JP2021098002A - Absorber and manufacturing method therefor - Google Patents

Absorber and manufacturing method therefor Download PDF

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JP2021098002A
JP2021098002A JP2020198893A JP2020198893A JP2021098002A JP 2021098002 A JP2021098002 A JP 2021098002A JP 2020198893 A JP2020198893 A JP 2020198893A JP 2020198893 A JP2020198893 A JP 2020198893A JP 2021098002 A JP2021098002 A JP 2021098002A
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core
wrap sheet
sheet
absorber
sides
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JP7402147B2 (en
Inventor
小林　賢司
Kenji Kobayashi
賢司 小林
康泰 木崎
Yasuhiro Kizaki
康泰 木崎
祥悟 千葉
Shogo Chiba
祥悟 千葉
貴仁 伊藤
Takahito Ito
貴仁 伊藤
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Kao Corp
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Kao Corp
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Priority to PCT/JP2020/045952 priority Critical patent/WO2021131721A1/en
Priority to CN202080085627.5A priority patent/CN114786639B/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/535—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/535—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
    • A61F13/536—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes having discontinuous areas of compression

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

To provide an absorber that can secure sufficient absorption capacity even if a thickness is reduced, that is less likely to swell even if excrement is absorbed and that is flexible and excellent in shape retention.SOLUTION: An absorbent core 2 has a first core 3 and a second core 4 thinner than the first core 3. The first core 3 is interposed between a core wrap sheet 5 and the second core 4. The second core 4 includes two base sheets 4S opposite each other and a water absorbent polymer interposed between the base sheets 4S, and both the sheets 4S are bonded together by an adhesive. One or more pairs of joint portions 6 where the core wrap sheet 5 and the second core 4 are directly joined without interposing the first core 3 are present at least on either both sides in a longitudinal direction X or both sides in a lateral direction Y with the first core 3 between them. A portion sandwiched between the pair of joint portions 6 in the first core 3 is compressed in a thickness direction by the core wrap sheet 5 and the second core 4.SELECTED DRAWING: Figure 1

Description

本発明は、使い捨ておむつや生理用ナプキン等の吸収性物品に用いられる吸収体及びその製造方法に関する。 The present invention relates to an absorbent body used for an absorbent article such as a disposable diaper or a sanitary napkin, and a method for producing the same.

吸収性物品に用いられる吸収体として、木材パルプなどの繊維材料の積繊体からなるものが広く用いられており、該積繊体に吸水性ポリマーが含有させたものも広く知られている。このような繊維材料の積繊体からなる吸収体は、比較的嵩高で厚みが厚いため、クッション性等に優れる反面、嵩張るために、吸収性物品の外観がスッキリせず見栄えが悪くなる、吸収性物品の着用者にゴワゴワとした違和感を与える等の問題があった。特に、吸収性物品の着用中に着用者が尿や経血等の体液を***した場合、吸収体はその***物を吸収保持することで膨潤するため、斯かる問題は一層深刻なものとなる。そこで、吸収体の薄型化が検討されている。 As an absorber used for an absorbent article, one made of a fiber material such as wood pulp is widely used, and one in which the absorbent polymer is contained in the fiber is also widely known. Since the absorber made of a laminated fiber material of such a fiber material is relatively bulky and thick, it is excellent in cushioning property, etc., but because it is bulky, the appearance of the absorbent article is not refreshed and the appearance is deteriorated. There was a problem that the wearer of the sex article was given a stiff and uncomfortable feeling. In particular, when the wearer excretes body fluids such as urine and menstrual blood while wearing an absorbent article, the absorber swells by absorbing and retaining the excrement, and such a problem becomes more serious. .. Therefore, thinning of the absorber is being studied.

吸収体の薄型化に関する従来技術として、例えば特許文献１には、パルプ及び吸水性ポリマーからなる上層吸収体と、該上層吸収体の非肌対向面側に隣接して配置され、２層のシート間に吸水性ポリマーが配置されてなる下層吸収体とから構成された吸収体が記載されている。特許文献１に記載の吸収体によれば、ポリマーシートからなる前記下層吸収体を設けることで薄型でありながら十分な吸収量が確保できるようになり、また、前記上層吸収体にも吸水性ポリマーが含まれているため、パルプのみからなる場合の液保持しにくく逆戻りが生じるという問題が解決できるとされている。 As a conventional technique for reducing the thickness of an absorber, for example, in Patent Document 1, an upper layer absorber made of pulp and a water-absorbent polymer and a two-layer sheet arranged adjacent to the non-skin facing surface side of the upper layer absorber. An absorber composed of a lower layer absorber having a water-absorbent polymer arranged between them is described. According to the absorber described in Patent Document 1, by providing the lower layer absorber made of a polymer sheet, a sufficient amount of absorption can be secured while being thin, and the upper layer absorber is also a water-absorbent polymer. It is said that it can solve the problem that it is difficult to hold the liquid and relapse occurs when it is composed only of pulp.

特許文献２には、特許文献１に記載の下層吸収体と同様の構成のシート状吸水体の製造方法が記載されている。特許文献２に記載のシート状吸水体は、接着剤が塗布された基材シートと被覆シートとの間に、高吸水性樹脂粒子層が挟み込まれて接着一体化されてなるもので、該シート状吸水体の製造方法は、該基材シートと粉粒体層と該被覆シートとを、それぞれをロール面に抱かせた状態で移動させながら、該基材シートに該粉粒体層を転写させた後に、該基材シートと該粉粒体層と該被覆シートとを接着一体化する工程を有し、この接着一体化ではプレスロールを用いて各シートないし層を圧着している。 Patent Document 2 describes a method for producing a sheet-shaped water absorber having the same structure as the lower layer absorber described in Patent Document 1. The sheet-shaped water absorbent described in Patent Document 2 is formed by sandwiching a highly water-absorbent resin particle layer between a base sheet coated with an adhesive and a coating sheet and adhering and integrating the sheet. The method for producing a water-absorbent body is to transfer the powder or granular material layer to the base material sheet while moving the base material sheet, the powder or granular material layer, and the coating sheet while holding each of them on a roll surface. After that, there is a step of adhering and integrating the base sheet, the powder or granular material layer, and the coating sheet, and in this adhesive integration, each sheet or layer is pressure-bonded using a press roll.

特開２０１８−５０９８７号公報JP-A-2018-50987 特開２００５−５９５７９号公報Japanese Unexamined Patent Publication No. 2005-59579

本発明の課題は、厚みを薄くしても十分な吸収容量を確保することができ、且つ***物を吸収しても膨潤しにくく柔軟で保形性に優れる吸収体を提供することに関する。 An object of the present invention is to provide an absorber which can secure a sufficient absorption capacity even if the thickness is reduced, is hard to swell even when excrement is absorbed, is flexible, and has excellent shape retention.

本発明は、着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体である。
本発明の吸収体の一実施形態においては、前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有する。
本発明の吸収体の一実施形態においては、前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置される。
本発明の吸収体の一実施形態においては、前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されている。
本発明の吸収体の一実施形態においては、前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在している。
本発明の吸収体の一実施形態においては、前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている。 The present invention is used for an absorbent article having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, and covers an absorbent core containing a water-absorbent material and an outer surface of the absorbent core. It is an absorber having a liquid-permeable core wrap sheet.
In one embodiment of the absorber of the present invention, the absorbent core is in contact with at least a first core made of a fibrous material and a skin-facing or non-skin-facing surface of the first core. It has a second core that is thinner than one core.
In one embodiment of the absorber of the present invention, the first core is interposed between the core wrap sheet and the second core.
In one embodiment of the absorber of the present invention, the second core comprises two opposing base sheet sheets and a water-absorbing polymer interposed between the two base material sheets. The two base sheets are bonded to each other by an adhesive.
In one embodiment of the absorber of the present invention, the core wrap sheet is placed on both sides in the vertical direction across the first core and on at least one of both sides in the horizontal direction across the first core. There is one or more pairs of joints in which the second core and the second core are directly joined without interposing the first core.
In one embodiment of the absorber of the present invention, the portion of the first core sandwiched between the pair of joints is compressed by the core wrap sheet and the second core in the thickness direction. There is.

また本発明は、下記（製造目的物の説明）に記載の吸収体の製造方法であって、一方向に搬送される前記コアラップシート上に前記第１コアを配置する、第１コア配置工程と、前記第１コアが配置され一方向に搬送される前記コアラップシートに、該第１コア側から前記第２コアを供給し、該第１コアを覆うように該コアラップシート上に配置する、第２コア配置工程とを有する。
本発明の吸収体の製造方法の一実施形態においては、前記第１コア配置工程では、前記コアラップシート上に配置された前記第１コアを挟んで該コアラップシートの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、該コアラップシートの該第１コアとの非重複部が存在するように、該第１コアを配置する。
本発明の吸収体の製造方法の一実施形態においては、前記第２コア配置工程では、前記コアラップシート上に配置された前記第１コアを挟んで該コアラップシートの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、前記第２コアの該第１コアとの非重複部が存在するように、該第２コアを配置する。
本発明の吸収体の製造方法の一実施形態においては、前記第２コア配置工程では、前記第２コアで前記第１コアを前記コアラップシート側に押圧することで該第１コアを厚み方向に圧縮しつつ、該第１コアを挟んで前記搬送方向の両側及び該第１コアを挟んで前記搬送直交方向の両側のうちの少なくとも一方の両側にて、該コアラップシート及び該第２コアそれぞれの前記非重複部どうしを接合して前記接合部の対を形成する。 Further, the present invention is a method for manufacturing an absorber according to the following (description of a manufacturing object), wherein the first core is placed on the core wrap sheet transported in one direction. Then, the second core is supplied from the first core side to the core wrap sheet in which the first core is arranged and conveyed in one direction, and the second core is arranged on the core wrap sheet so as to cover the first core. It has a second core placement step.
In one embodiment of the method for producing an absorber of the present invention, in the first core arranging step, both sides of the core wrap sheet arranged on the core wrap sheet in the transport direction and the core wrap sheet are sandwiched. The first core so that a non-overlapping portion of the core wrap sheet with the first core exists on at least one of both sides in the transport orthogonal direction orthogonal to the transport direction with the first core in between. To place.
In one embodiment of the method for producing an absorber of the present invention, in the second core arranging step, both sides of the core wrap sheet arranged on the core wrap sheet in the transport direction and the core wrap sheet are sandwiched. The second core so that the non-overlapping portion of the second core with the first core exists on at least one of both sides of the transport orthogonal direction orthogonal to the transport direction with the first core in between. To place.
In one embodiment of the method for producing an absorber of the present invention, in the second core arranging step, the first core is pressed toward the core wrap sheet side by the second core to push the first core in the thickness direction. The core wrap sheet and the second core on both sides of the transport direction with the first core sandwiched between them and at least one of both sides of the transport orthogonal direction with the first core sandwiched between the two cores. The non-overlapping portions are joined to each other to form a pair of the joint portions.

また本発明は、下記（製造目的物の説明）に記載の吸収体の製造方法であって、一方向に搬送される前記第２コア上に前記第１コアを配置する、第１コア配置工程と、前記第１コアが配置され一方向に搬送される前記第２コアに、該第１コア側から前記コアラップシートを供給し、該第１コアを覆うように該第２コア上に配置する、コアラップシート配置工程とを有する。
本発明の吸収体の製造方法の一実施形態においては、前記第１コア配置工程では、前記第２コア上に配置された前記第１コアを挟んで該第２コアの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、該第２コアの該第１コアとの非重複部が存在するように、該第１コアを配置する。
本発明の吸収体の製造方法の一実施形態においては、前記コアラップシート配置工程では更に、前記第２コア上に配置された前記第１コアを挟んで該第２コアの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、前記コアラップシートの該第１コアとの非重複部が存在するように、該コアラップシートを配置する。
本発明の吸収体の製造方法の一実施形態においては、前記コアラップシート配置工程では更に、前記コアラップシートで前記第１コアを前記第２コア側に押圧することで該第１コアを厚み方向に圧縮しつつ、該第１コアを挟んで前記搬送方向の両側及び該第１コアを挟んで前記搬送直交方向の両側のうちの少なくとも一方の両側にて、該第２コア及び該コアラップシートそれぞれの前記非重複部どうしを接合して前記接合部の対を形成する。 Further, the present invention is a method for manufacturing an absorber according to the following (description of a manufacturing object), wherein the first core is placed on the second core transported in one direction. Then, the core wrap sheet is supplied from the first core side to the second core in which the first core is arranged and conveyed in one direction, and the core wrap sheet is arranged on the second core so as to cover the first core. It has a core wrap sheet arranging step.
In one embodiment of the method for producing an absorber of the present invention, in the first core arranging step, both sides of the first core arranged on the second core in the transport direction and the second core are sandwiched. The first core so that the non-overlapping portion of the second core with the first core exists on at least one of both sides of the transport orthogonal direction orthogonal to the transport direction with the first core in between. To place.
In one embodiment of the method for producing an absorber of the present invention, in the core wrap sheet arranging step, both sides of the first core arranged on the second core and both sides in the transport direction of the second core are further interposed. The core wrap so that a non-overlapping portion of the core wrap sheet with the first core exists on at least one of both sides in the transport orthogonal direction orthogonal to the transport direction with the first core in between. Place the sheet.
In one embodiment of the method for producing an absorber of the present invention, in the core wrap sheet arranging step, the first core is further thickened by pressing the first core toward the second core side with the core wrap sheet. The second core and the core wrap on both sides of the transport direction with the first core sandwiched and at least one of both sides of the transport orthogonal direction sandwiching the first core while compressing in the direction. The non-overlapping portions of the sheets are joined to each other to form a pair of the joint portions.

（製造目的物の説明）
着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体で、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている。 (Explanation of manufacturing object)
Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. With an absorber that has a core wrap sheet
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
The portion of the first core sandwiched between the pair of joints is in a state of being compressed in the thickness direction by the core wrap sheet and the second core.

本発明によれば、厚みを薄くしても十分な吸収容量を確保することができ、且つ***物を吸収しても膨潤しにくく柔軟で保形性に優れる吸収体が提供される。 According to the present invention, there is provided an absorber that can secure a sufficient absorption capacity even if the thickness is reduced, is hard to swell even if excrement is absorbed, is flexible, and has excellent shape retention.

図１は、本発明の製造方法によって製造される吸収体の一例の模式的な斜視図である。FIG. 1 is a schematic perspective view of an example of an absorber manufactured by the manufacturing method of the present invention. 図２は、図１のＩ−Ｉ線断面を模式的に示す横断面図である。FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 図３（ａ）及び図３（ｂ）は、それぞれ、本発明の吸収体におけるコアラップシートと第２コアとの接合部のパターンの一例を示す図であり、該吸収体の肌対向面側の模式的な平面図である。3 (a) and 3 (b) are views showing an example of the pattern of the joint portion between the core wrap sheet and the second core in the absorber of the present invention, respectively, and are on the skin-facing surface side of the absorber. It is a schematic plan view of. 図４は、本発明の製造方法の第１実施形態の実施に使用可能な装置の全体概略図である。FIG. 4 is an overall schematic view of an apparatus that can be used to carry out the first embodiment of the manufacturing method of the present invention. 図５は、図４に示す装置でのコアラップシートにおける接着剤の塗布パターンの一例を模式的に示す平面図である。FIG. 5 is a plan view schematically showing an example of an adhesive application pattern on the core wrap sheet in the apparatus shown in FIG. 図６は、図４に示す装置の第２コア製造部において、散布手段の下方で２枚の基材シートどうしが重ね合わされる直前の様子を模式的に示す平面図である。FIG. 6 is a plan view schematically showing a state immediately before the two base sheet sheets are overlapped with each other below the spraying means in the second core manufacturing section of the apparatus shown in FIG. 図７は、図４に示す装置の第２コア製造部での吸水性ポリマーの基材シートに対する散布パターンを模式的に示す平面図である。FIG. 7 is a plan view schematically showing a spraying pattern of the water-absorbent polymer on the base sheet in the second core manufacturing section of the apparatus shown in FIG. 図８は、図４の符号Ｐ１で示す位置（第１コアと第２コアとの合流位置）での被搬送物（コアラップシートと第１コアと第２コアとの積層物）の搬送直交方向に沿う断面を模式的に示す横断面図である。FIG. 8 shows the transport orthogonality of the object to be transported (the laminate of the core wrap sheet, the first core, and the second core) at the position indicated by the reference numeral P1 in FIG. 4 (the confluence position of the first core and the second core). It is a cross-sectional view which shows typically the cross section along the direction. 図９は、図４の符号Ｐ２で示す位置（コアラップシートの折り返し手段よりも搬送方向下流側）での被搬送物（長尺の吸収体）の搬送直交方向に沿う断面を模式的に示す横断面図である。FIG. 9 schematically shows a cross section of the object to be transported (long absorber) along the transport orthogonal direction at the position indicated by reference numeral P2 in FIG. 4 (downstream in the transport direction from the folding means of the core wrap sheet). It is a cross-sectional view. 図１０は、本発明の製造方法の第２実施形態の図８相当図であり、第１コアとコアラップシートとの合流位置での被搬送物（第２コアと第１コアとコアラップシートとの積層物）の搬送直交方向に沿う断面を模式的に示す横断面図である。FIG. 10 is a view corresponding to FIG. 8 of the second embodiment of the manufacturing method of the present invention, and the object to be transported at the confluence position of the first core and the core wrap sheet (the second core, the first core, and the core wrap sheet). It is a cross-sectional view schematically showing the cross section along the transport orthogonal direction of (the laminate with and). 図１１は、本発明の製造方法の第３実施形態の図８相当図であり、第１コアとコアラップシートとの合流位置での被搬送物（第２コアと第１コアとコアラップシートとの積層物）の搬送直交方向に沿う断面を模式的に示す横断面図である。FIG. 11 is a view corresponding to FIG. 8 of the third embodiment of the manufacturing method of the present invention, in which the object to be transported at the confluence position of the first core and the core wrap sheet (the second core, the first core, and the core wrap sheet). It is a cross-sectional view schematically showing the cross section along the transport orthogonal direction of (the laminate with and). 図１２は、各実施例及び比較例の吸収体を用いて作製されたパンツ型使い捨ておむつの展開且つ伸長状態における肌対向面側の模式的な展開平面図である。FIG. 12 is a schematic development plan view of the pants-type disposable diaper produced by using the absorbers of the respective examples and the comparative examples on the skin-facing surface side in the unfolded and stretched state.

以下、本発明をその好ましい実施形態に基づき図面を参照しながら説明する。なお、以下の図面の記載において、同一又は類似の部分には、同一又は類似の符号を付している。図面は基本的に模式的なものであり、各寸法の比率などは現実のものとは異なる場合がある。 Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. The drawings are basically schematic, and the ratio of each dimension may differ from the actual one.

図１及び図２には、本発明の製造方法の製造目的物である吸収体の一例である吸収体１が示され、図４には、本発明の製造方法の一例である吸収体１の製造方法の概略が示されている。吸収体１は、着用者の前後方向に対応する縦方向Ｘとこれに直交する横方向Ｙとを有する吸収性物品（図示せず）において、尿、便、経血、汗等の***物（体液）を吸収保持するのに用いられるもので、吸水性材料を含有する吸収性コア２と、該吸収性コア２の外面を被覆する液透過性のコアラップシート５とを有する。 1 and 2 show an absorber 1 which is an example of an absorber which is a manufacturing object of the manufacturing method of the present invention, and FIG. 4 shows an absorber 1 which is an example of a manufacturing method of the present invention. The outline of the manufacturing method is shown. The absorber 1 is an excrement (not shown) such as urine, stool, menstrual blood, and sweat in an absorbent article (not shown) having a vertical direction X corresponding to the front-back direction of the wearer and a horizontal direction Y orthogonal to the vertical direction X. It is used to absorb and retain body fluid), and has an absorbent core 2 containing a water-absorbent material and a liquid-permeable core wrap sheet 5 that covers the outer surface of the absorbent core 2.

吸収体１及びこれを構成する吸収性コア２は、図１に示すように、縦方向Ｘに長い形状をなし、両者の長手方向は縦方向Ｘに一致し、両者の幅方向（長手方向と直交する方向）は横方向Ｙに一致している。また縦方向Ｘは、吸収体１の製造時における搬送方向（以下、「ＭＤ」ともいう。Machine Directionの略である。）に一致し、横方向Ｙは、ＭＤと直交する搬送直交方向（以下、「ＣＤ」ともいう。Cross Machine Directionの略である。）に一致する。 As shown in FIG. 1, the absorber 1 and the absorbent core 2 constituting the absorber 1 have a long shape in the vertical direction X, the longitudinal direction of both coincides with the vertical direction X, and the width direction (longitudinal direction) of both The orthogonal direction) coincides with the lateral direction Y. Further, the vertical direction X corresponds to the transport direction at the time of manufacturing the absorber 1 (hereinafter, also referred to as “MD”, which is an abbreviation for Machine Direction), and the horizontal direction Y is the transport orthogonal direction (hereinafter, hereinafter, orthogonal to the MD). , Also called "CD". Abbreviation for Cross Machine Direction.)

吸収性コア２は、少なくとも繊維材料を形成材料とする第１コア３と、該第１コア３の肌対向面３ａ又は非肌対向面３ｂに接触し、該第１コア３よりも厚みが薄い第２コア４とを有する。本明細書において、「肌対向面」は、吸収体又はその構成部材（例えば第１コア３、第２コア４）における、使用時（吸収体が組み込まれた吸収性物品の着用時）に使用者の肌側に向けられる面、すなわち相対的に使用者の肌から近い側であり、「非肌対向面」は、吸収体又はその構成部材における、使用時に肌側とは反対側に向けられる面、すなわち相対的に使用者の肌から遠い側である。 The absorbent core 2 is in contact with at least the first core 3 made of a fiber material and the skin facing surface 3a or the non-skin facing surface 3b of the first core 3, and is thinner than the first core 3. It has a second core 4. In the present specification, the "skin facing surface" is used at the time of use (when wearing an absorbent article incorporating the absorber) in the absorber or its constituent members (for example, the first core 3 and the second core 4). The surface facing the skin side of the person, that is, the side relatively close to the skin of the user, and the "non-skin facing surface" is directed to the side of the absorber or its constituent members opposite to the skin side at the time of use. The surface, that is, the side relatively far from the user's skin.

本実施形態では、図１及び図２に示すように、第２コア４は、第１コア３の非肌対向面３ｂに接触している。すなわち本実施形態では、第１コア３の方が第２コア４よりも使用者の肌に近い側に配されており、したがって、第１コア３の方が第２コア４よりも先に、吸収体１が吸収すべき***物と接触する。 In the present embodiment, as shown in FIGS. 1 and 2, the second core 4 is in contact with the non-skin facing surface 3b of the first core 3. That is, in the present embodiment, the first core 3 is arranged closer to the user's skin than the second core 4, and therefore the first core 3 precedes the second core 4. The absorber 1 comes into contact with the excrement to be absorbed.

本実施形態では、コアラップシート５は１枚のシートであり、コアラップシート５の横方向Ｙの長さ（幅）は、吸収性コア２のそれの１．１倍以上３倍以下である。コアラップシート５は、吸収性コア２の肌対向面（第１コア３の肌対向面３ａ、第２コア４の肌対向面４ａ）の全域を被覆し、且つ吸収性コア２の縦方向Ｘに沿う両側縁から横方向Ｙの外方に延出し、その延出部が、吸収性コア２の非肌対向面側に巻きかけられて、吸収性コア２の非肌対向面（第２コア４の非肌対向面４ｂ）の全域を被覆している。図２に示すように、吸収性コア２の非肌対向面の横方向Ｙの中央部には、コアラップシート５の縦方向Ｘに沿う両側縁部（前記延出部の先端部）どうしが重なった重複部が形成されている。コアラップシート５としては、液透過性のシートを用いることができ、例えば、紙、不織布等が挙げられる。 In the present embodiment, the core wrap sheet 5 is a single sheet, and the length (width) of the core wrap sheet 5 in the lateral direction Y is 1.1 times or more and 3 times or less that of the absorbent core 2. .. The core wrap sheet 5 covers the entire skin-facing surface of the absorbent core 2 (skin-facing surface 3a of the first core 3 and skin-facing surface 4a of the second core 4), and the absorbent core 2 is X in the vertical direction. It extends outward in the lateral direction Y from both side edges along the above, and the extending portion is wound around the non-skin facing surface side of the absorbent core 2 so that the non-skin facing surface of the absorbent core 2 (second core). It covers the entire area of the non-skin facing surface 4b) of 4. As shown in FIG. 2, at the center of the non-skin facing surface of the absorbent core 2 in the lateral direction Y, both side edges (tips of the extending portions) along the vertical direction X of the core wrap sheet 5 are located. Overlapping overlaps are formed. As the core wrap sheet 5, a liquid-permeable sheet can be used, and examples thereof include paper and non-woven fabric.

第１コア３は、コアラップシート５と第２コア４との間に介在配置されている。第１コア３は、第２コア４に比べて、縦方向Ｘの長さ及び横方向Ｙの長さのうちの少なくとも一方が短く、第２コア４における第１コア３の配置面（図示の形態では肌対向面４ａ）の周縁部には、第１コア３が配置されずに第２コア４が露出している部分が存在している。本実施形態では、図１に示すように、第１コア３は、第２コア４に比べて、縦方向Ｘの長さ及び横方向Ｙの長さの双方が短く、第１コア３の周縁（輪郭線）の全体が、第２コア４の周縁（輪郭線）よりも内方に位置している。したがって、第２コア４の肌対向面４ａ（第１コア３の配置面）の周縁部（第１コア３の非配置部）は、コアラップシート５で被覆され、コアラップシート５と接触し得る状態にある。 The first core 3 is interposed between the core wrap sheet 5 and the second core 4. The first core 3 has at least one of the length X in the vertical direction and the length Y in the horizontal direction shorter than the second core 4, and the arrangement surface of the first core 3 in the second core 4 (not shown). In the form, there is a portion where the first core 3 is not arranged and the second core 4 is exposed on the peripheral edge portion of the skin facing surface 4a). In the present embodiment, as shown in FIG. 1, the first core 3 has a shorter length in both the vertical direction X and the length in the horizontal direction Y than the second core 4, and is a peripheral edge of the first core 3. The entire (contour line) is located inward of the peripheral edge (contour line) of the second core 4. Therefore, the peripheral edge portion (non-arranged portion of the first core 3) of the skin-facing surface 4a (arranged surface of the first core 3) of the second core 4 is covered with the core wrap sheet 5 and comes into contact with the core wrap sheet 5. It is in a state of gaining.

本実施形態では、第１コア３は、図１に示すように、横方向Ｙの長さ（幅）が縦方向Ｘの全長にわたって一定ではなく、縦方向Ｘの一端側が他端側に比べて横方向Ｙの長さが長く幅広である。吸収体１は通常、吸収性物品において、第１コア３の縦方向Ｘの両端部のうち、この相対的に幅広の縦方向端部が、吸収性物品の着用者の腹側（前側）に位置するように配置される。 In the present embodiment, as shown in FIG. 1, the length (width) of the first core 3 in the horizontal direction Y is not constant over the entire length of the vertical direction X, and one end side of the vertical direction X is compared with the other end side. The length of the lateral direction Y is long and wide. In an absorbent article, the absorber 1 usually has a relatively wide vertical end of both ends of the first core 3 in the longitudinal direction X on the ventral side (front side) of the wearer of the absorbent article. Arranged to be located.

第１コア３は、図２に示すように、繊維材料３Ｆを含有する。繊維材料３Ｆとしては吸水性繊維が好ましい。吸水性繊維としては、例えば、針葉樹パルプや広葉樹パルプ等の木材パルプ、綿パルプや麻パルプ等の非木材パルプ等の天然繊維；カチオン化パルプ、マーセル化パルプ等の変性パルプ（以上、セルロース系繊維）；親水性合成繊維等が挙げられ、これらの１種を単独で又は２種以上を混合して用いることができる。第１コア３は、典型的には、繊維材料３Ｆとしてセルロース系繊維を含有する。 As shown in FIG. 2, the first core 3 contains the fiber material 3F. As the fiber material 3F, a water-absorbent fiber is preferable. Examples of the water-absorbent fiber include wood pulp such as coniferous pulp and broadleaf pulp, natural fiber such as non-wood pulp such as cotton pulp and hemp pulp; and modified pulp such as cationized pulp and marcelled pulp (these are cellulosic fibers). ); Hydrophilic synthetic fibers and the like can be mentioned, and one of these can be used alone or in combination of two or more. The first core 3 typically contains a cellulosic fiber as the fiber material 3F.

本実施形態では、第１コア３は、繊維材料３Ｆに加えて更に、図２に示すように、吸水性ポリマー３Ｐを含有する。吸水性ポリマー３Ｐとしては、一般に粒子状のものが用いられるが、繊維状のものでもよい。粒子状の吸水性ポリマー３Ｐの形状は特に限定されず、例えば、球状、塊状、俵状、不定形状であり得る。吸水性ポリマー３Ｐは、典型的には、アクリル酸又はアクリル酸アルカリ金属塩の重合物又は共重合物を主体とする。 In the present embodiment, the first core 3 further contains a water-absorbent polymer 3P as shown in FIG. 2 in addition to the fiber material 3F. As the water-absorbent polymer 3P, a particulate polymer is generally used, but a fibrous polymer may also be used. The shape of the particulate water-absorbent polymer 3P is not particularly limited, and may be, for example, spherical, lumpy, bale-shaped, or indefinite. The water-absorbent polymer 3P is typically composed mainly of a polymer or copolymer of acrylic acid or an alkali metal salt of acrylic acid.

本実施形態では、第１コア３は、図１及び図２に示すように、該第１コア３の厚み方向の全域にわたって該第１コア３の形成材料が存在しない形成材料非存在部３Ｎを有している。図示の形態では、形成材料非存在部３Ｎは、第１コア３（吸収体１）を横方向Ｙに二等分して縦方向Ｘに延びる仮想直線（図示せず）を基準として対称に形成され、該仮想直線の両側に一対形成されている。この一対の形成材料非存在部３Ｎは、それぞれ、平面視において縦方向Ｘに長い形状（具体的には長方形形状）をなしている。形成材料非存在部３Ｎは、吸収体１の吸収対象である***物の流路として機能し、***物の面方向における拡散を促進し、吸収体１の吸収性能の有効活用に寄与し得るものである。また、形成材料非存在部３Ｎは、第１コア３が体圧等の外力を受けて屈曲するなどして変形する際の変形誘導部（可撓軸）として機能し、吸収体１を具備する吸収性物品の着用時の違和感を低減して、着用感及びフィット性を向上し得るものである。形成材料非存在部３Ｎはこのような役割を担うものであることから、第１コア３において***物が集中しやすく（最初に***物を受けやすく）且つ体圧等の外力を受けやすい部位に配置されることが好ましい。このような観点から、形成材料非存在部３Ｎは、吸収体１が組み込まれる吸収性物品の着用時に着用者の股間部に対応する部位、具体的には、少なくとも第１コア３の縦方向Ｘの中央部に配置されることが好ましい。 In the present embodiment, as shown in FIGS. 1 and 2, the first core 3 has a forming material non-existing portion 3N in which the forming material of the first core 3 does not exist over the entire area in the thickness direction of the first core 3. Have. In the illustrated form, the forming material non-existing portion 3N is formed symmetrically with reference to a virtual straight line (not shown) extending in the vertical direction X by bisecting the first core 3 (absorbent body 1) in the horizontal direction Y. And a pair is formed on both sides of the virtual straight line. Each of the pair of forming material non-existing portions 3N has a long shape (specifically, a rectangular shape) in the vertical direction X in a plan view. The forming material non-existent portion 3N functions as a flow path for excrement to be absorbed by the absorber 1, promotes diffusion of the excrement in the plane direction, and can contribute to effective utilization of the absorption performance of the absorber 1. Is. Further, the forming material non-existing portion 3N functions as a deformation guiding portion (flexible shaft) when the first core 3 is deformed by being bent by receiving an external force such as body pressure, and includes an absorber 1. It is possible to reduce the discomfort when wearing the absorbent article and improve the wearing feeling and the fit. Since the forming material non-existent portion 3N plays such a role, the excrement is easily concentrated in the first core 3 (the excrement is easily received first) and the external force such as body pressure is easily received. It is preferable to be arranged. From this point of view, the forming material non-existent portion 3N is a portion corresponding to the crotch portion of the wearer when wearing the absorbent article in which the absorber 1 is incorporated, specifically, at least the vertical X of the first core 3. It is preferably arranged in the central part of the.

形成材料非存在部３Ｎの縦方向Ｘの長さＬ（図１参照）は、好ましくは３０ｍｍ以上、より好ましくは５０ｍｍ以上、そして、好ましくは２５０ｍｍ以下、より好ましくは２００ｍｍ以下である。
形成材料非存在部３Ｎの横方向Ｙの長さすなわち幅Ｗ（図１及び図２参照）は、好ましくは３ｍｍ以上、より好ましくは５ｍｍ以上、そして、好ましくは３０ｍｍ以下、より好ましくは２０ｍｍ以下である。
横方向Ｙに隣り合う２個の形成材料非存在部３Ｎ，３Ｎどうしの間隔Ｇ（図１及び図２参照）は、好ましくは５ｍｍ以上、より好ましくは１０ｍｍ以上、そして、好ましくは１００ｍｍ以下、より好ましくは７０ｍｍ以下である。 The length L (see FIG. 1) of the forming material non-existing portion 3N in the longitudinal direction is preferably 30 mm or more, more preferably 50 mm or more, and preferably 250 mm or less, more preferably 200 mm or less.
The length or width W (see FIGS. 1 and 2) of the forming material non-existing portion 3N in the lateral direction is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 20 mm or less. is there.
The distance G (see FIGS. 1 and 2) between the two forming material non-existing portions 3N and 3N adjacent to each other in the lateral direction Y is preferably 5 mm or more, more preferably 10 mm or more, and preferably 100 mm or less. It is preferably 70 mm or less.

形成材料非存在部３Ｎは、第１コア３の製造時における、繊維材料３Ｆを含むコア形成材料の積繊工程において、該コア形成材料の積繊を意図的に阻害して形成された部位である。形成材料非存在部３Ｎを有する第１コア３は、従来公知の吸収性コアの製造方法に従って製造することができ、典型的には、空気流に乗せて供給したコア形成材料を、回転ドラムの外周面に形成された集積用凹部に吸引し堆積させて第１コア３を得る方法において、該集積用凹部として、該集積用凹部の底部における形成材料非存在部３Ｎに対応する部位が周辺部に比して該回転ドラムの径方向外方に突出しているものを用いることで製造することができる。斯かる方法で得られた第１コア３において、コア形成材料が存在していない部分が形成材料非存在部３Ｎである。 The forming material non-existing portion 3N is a portion formed by intentionally inhibiting the fiber stacking of the core forming material in the fiber stacking step of the core forming material including the fiber material 3F at the time of manufacturing the first core 3. is there. The first core 3 having the forming material non-existing portion 3N can be produced according to a conventionally known method for producing an absorbent core, and typically, the core forming material supplied on an air stream is used in a rotating drum. In the method of obtaining the first core 3 by sucking and accumulating in the accumulation recess formed on the outer peripheral surface, the portion corresponding to the forming material non-existing portion 3N at the bottom of the accumulation recess is the peripheral portion as the accumulation recess. It can be manufactured by using a rotating drum that protrudes outward in the radial direction as compared with the above. In the first core 3 obtained by such a method, the portion where the core forming material does not exist is the forming material non-existing portion 3N.

本実施形態では、図２に示すように、形成材料非存在部３Ｎにおいて、コアラップシート５と第２コア４（より具体的には後述する基材シート４Ｓ）とが接合されている。斯かる構成により、第１コア３の保形性が向上し、***物の吸収前後で第１コア３の形状が崩れ難いため、吸収体１の吸収性能の一層の向上が図られる。コアラップシート５と第２コア４（基材シート４Ｓ）とは、形成材料非存在部３Ｎと平面視で重複する部分の全域において互いに接合されている必要は無く、少なくとも該部分の一部で互いに接合されていればよい。形成材料非存在部３Ｎにおけるコアラップシート５と第２コア４との接合手段は特に制限されず、接着剤、ヒートシール等の公知の接合手段を用いることができる。本実施形態では、後述するように接着剤を用いている。 In the present embodiment, as shown in FIG. 2, the core wrap sheet 5 and the second core 4 (more specifically, the base material sheet 4S described later) are joined in the forming material non-existing portion 3N. With such a configuration, the shape retention of the first core 3 is improved, and the shape of the first core 3 is not easily deformed before and after the absorption of excrement, so that the absorption performance of the absorber 1 can be further improved. The core wrap sheet 5 and the second core 4 (base material sheet 4S) do not have to be joined to each other in the entire area overlapping the forming material non-existing portion 3N in a plan view, and at least a part of the portion. It suffices if they are joined to each other. The joining means between the core wrap sheet 5 and the second core 4 in the forming material non-existing portion 3N is not particularly limited, and known joining means such as an adhesive and a heat seal can be used. In this embodiment, an adhesive is used as described later.

本実施形態では、第１コア３と第２コア４（より具体的には後述する基材シート４Ｓ）とが接着剤によって接合されている。斯かる構成により、第１コア３と第２コア４とが一体化されるため、吸収性コア２の外形形状が安定し、所定の性能がより安定的に発現し得るようになる。また吸収体１が、吸収性物品において第１コア３の方が第２コア４よりも吸収性物品の着用者の肌から近くなるように配置された場合に、第１コア３と第２コア４とが接着剤によって接合されていると、吸収体１に着用者の体圧がかかったときに、該接着剤が該体圧を緩和する機能を果たし得るため、そのような外圧による第２コア４への影響を最小限に抑えることが可能となる。第１コア３と第２コア４との間に介在配置される接着剤としては、吸収性物品における構成部材どうしの接合に使用されているものを特に制限無く用いることができ、例えば、ホットメルト接着剤を用いることができる。第１コア３と第２コア４との間に介在配置される接着剤の坪量は、前述した体圧等の外力を緩和する機能を一層確実に奏させるようにする観点から、好ましくは１ｇ／ｍ２以上、より好ましくは２ｇ／ｍ２以上、そして、好ましくは１５ｇ／ｍ２以下、より好ましくは１０ｇ／ｍ２以下である。 In the present embodiment, the first core 3 and the second core 4 (more specifically, the base sheet 4S described later) are bonded by an adhesive. With such a configuration, since the first core 3 and the second core 4 are integrated, the outer shape of the absorbent core 2 is stabilized, and a predetermined performance can be exhibited more stably. Further, when the absorber 1 is arranged so that the first core 3 of the absorbent article is closer to the wearer's skin of the absorbent article than the second core 4, the first core 3 and the second core 3 are arranged. When the absorber 1 is joined with an adhesive, when the body pressure of the wearer is applied to the absorber 1, the adhesive can perform a function of relieving the body pressure. It is possible to minimize the influence on the core 4. As the adhesive interposed between the first core 3 and the second core 4, those used for joining the constituent members in the absorbent article can be used without particular limitation, and for example, hot melt can be used. Adhesives can be used. The basis weight of the adhesive intervening between the first core 3 and the second core 4 is preferably 1 g from the viewpoint of ensuring that the above-mentioned function of alleviating external forces such as body pressure is more reliably performed. / M 2 or more, more preferably 2 g / m 2 or more, and preferably 15 g / m 2 or less, more preferably 10 g / m 2 or less.

第１コア３の坪量は特に制限されないが、吸収容量と薄型化及び柔軟性とのバランスの観点から、好ましくは５０ｇ／ｍ２以上、より好ましくは８０ｇ／ｍ２以上、そして、好ましくは２５０ｇ／ｍ２以下、より好ましくは２００ｇ／ｍ２以下である。
同様の観点から、本実施形態のように第１コア３に吸水性ポリマー３Ｐを含有させる場合、第１コア３における吸水性ポリマー３Ｐの坪量は、好ましくは４０ｇ／ｍ２以上、より好ましくは６０ｇ／ｍ２以上、そして、好ましくは４５０ｇ／ｍ２以下、より好ましくは３５０ｇ／ｍ２以下である。 The basis weight of the first core 3 is not particularly limited, but from the viewpoint of the balance between absorption capacity, thinning and flexibility, it is preferably 50 g / m 2 or more, more preferably 80 g / m 2 or more, and preferably 250 g. / M 2 or less, more preferably 200 g / m 2 or less.
From the same viewpoint, when the water-absorbent polymer 3P is contained in the first core 3 as in the present embodiment, the basis weight of the water-absorbent polymer 3P in the first core 3 is preferably 40 g / m 2 or more, more preferably. It is 60 g / m 2 or more, preferably 450 g / m 2 or less, and more preferably 350 g / m 2 or less.

第２コア４は、図２に示すように、相対向する２枚の基材シート４Ｓと、該２枚の基材シート４Ｓ間に介在配置された吸水性ポリマー４Ｐとを含み、該２枚の基材シート４Ｓどうしは接着剤によって互いに接合されている。吸水性ポリマー４Ｐとしては、第１コア３に含有され得る吸水性ポリマー３Ｐと同様のものを用いることができる。第２コア４に使用される接着剤は、後述するように、２枚の基材シート４Ｓそれぞれの相対向する面（吸水性ポリマーの配置面）に所定のパターンで塗布されている。第２コア４に使用される接着剤としては、吸収性物品における構成部材どうしの接合に使用されているものを特に制限無く用いることができ、例えば、ホットメルト接着剤を用いることができる。 As shown in FIG. 2, the second core 4 includes two base sheets 4S facing each other and a water-absorbent polymer 4P interposed between the two base sheets 4S, and the two sheets. The base sheet 4S of the above is bonded to each other by an adhesive. As the water-absorbent polymer 4P, the same water-absorbent polymer 3P that can be contained in the first core 3 can be used. As will be described later, the adhesive used for the second core 4 is applied to the opposing surfaces (arrangement surfaces of the water-absorbing polymer) of the two base sheet 4S in a predetermined pattern. As the adhesive used for the second core 4, those used for joining the constituent members in the absorbent article can be used without particular limitation, and for example, a hot melt adhesive can be used.

基材シート４Ｓとしては、吸水性ポリマー４Ｐを固定可能なシート状物であればよく、液透過性でも液不透過性でもよい。基材シート４Ｓとしては、例えば、不織布、織布、編物、紙等の繊維構造体の他、樹脂フィルム、発泡体、ネットなどが挙げられ、これらの１種を単独で又は２種以上を積層して用いることができる。基材シート４Ｓは、典型的には、不織布を含んで構成される。基材シート４Ｓを構成する不織布としては、各種製法によるものを特に制限なく用いることができ、例えば、エアスルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、メルトブローン不織布、スパンボンド−メルトブローン−スパンボンド（ＳＭＳ）不織布が挙げられる。これらの不織布は、親水化処理が施された繊維からなる親水性不織布であってもよい。また、２枚の基材シート４Ｓどうしは、互いに同じであってもよく、異なっていてもよい。後者の場合、例えば、２枚の基材シート４Ｓのうち、相対的に吸収性物品の着用者の肌から近い（本実施形態では第１コア３に近い）ものが液透過性を有し、着用者の肌（第１コア３）から遠いものが液不透過性を有するという形態を採用できる。１枚の基材シート４Ｓの坪量は、吸収体の薄型化と実用上十分な強度とのバランス等の観点から、好ましくは５ｇ／ｍ２以上、より好ましくは７ｇ／ｍ２以上、そして、好ましくは５０ｇ／ｍ２以下、より好ましくは４０ｇ／ｍ２以下である。 The base sheet 4S may be a sheet-like material to which the water-absorbent polymer 4P can be fixed, and may be liquid-permeable or liquid-impermeable. Examples of the base sheet 4S include fiber structures such as non-woven fabrics, woven fabrics, knits, and papers, as well as resin films, foams, nets, etc., and one of these may be used alone or two or more thereof may be laminated. Can be used. The base sheet 4S is typically configured to include a non-woven fabric. As the non-woven fabric constituting the base sheet 4S, those produced by various manufacturing methods can be used without particular limitation. For example, air-through non-woven fabric, heat roll non-woven fabric, spunlace non-woven fabric, spunbond non-woven fabric, melt-blown non-woven fabric, spunbond-melt-blown-span Bond (SMS) non-woven fabric can be mentioned. These non-woven fabrics may be hydrophilic non-woven fabrics made of fibers that have been subjected to a hydrophilic treatment. Further, the two base sheet 4Ss may be the same as each other or may be different from each other. In the latter case, for example, of the two base sheet 4S, the one relatively close to the wearer's skin of the absorbent article (close to the first core 3 in the present embodiment) has liquid permeability. A form in which a material far from the wearer's skin (first core 3) has liquid impermeable property can be adopted. The basis weight of one base sheet 4S is preferably 5 g / m 2 or more, more preferably 7 g / m 2 or more, and from the viewpoint of a balance between thinning the absorber and sufficient strength for practical use. It is preferably 50 g / m 2 or less, more preferably 40 g / m 2 or less.

吸収体１は前述したとおり、吸水性を有する二層（第１コア３及び第２コア４）が積層された積層構造を有し、且つ該二層に吸水性ポリマー３Ｐ，４Ｐが含有されているところ、本実施形態の吸収体１では、該積層構造における吸水性ポリマーの分布に関し、第１コア３は、第２コア４に比べて、吸水性ポリマーの坪量（単位面積当たりの質量）が大きい。すなわち本実施形態の吸収体１では、吸水性ポリマーの坪量に関して、「第１コア３＞第２コア４」という大小関係が成立する。なお、ここでいう「吸水性ポリマーの坪量」は、当該コアが、形成材料非存在部３Ｎの如き、コア形成材料が存在しない部分を有する場合は、該部分以外の部分における吸水性ポリマーの坪量を意味する。 As described above, the absorber 1 has a laminated structure in which two water-absorbent layers (first core 3 and second core 4) are laminated, and the two layers contain water-absorbent polymers 3P and 4P. However, in the absorber 1 of the present embodiment, regarding the distribution of the water-absorbent polymer in the laminated structure, the first core 3 has a basis weight (mass per unit area) of the water-absorbent polymer as compared with the second core 4. Is big. That is, in the absorber 1 of the present embodiment, the magnitude relationship of "first core 3> second core 4" is established with respect to the basis weight of the water-absorbent polymer. When the core has a portion where the core forming material does not exist, such as the forming material non-existing portion 3N, the “water-absorbing polymer basis weight” referred to here refers to the portion of the water-absorbing polymer other than the portion. It means the basis weight.

吸収体１全体の液（***物）の吸収に伴う膨潤の程度を抑制し、吸収体１の膨潤後の柔軟性を確保しつつ、吸収体１の吸収性能の向上を図る観点からは、前記の「第１コア３＞第２コア４」という大小関係を満たすことがより好ましい。第１コア３は、典型的には、繊維材料３Ｆの集合体に吸水性ポリマー３Ｐが担持された構成を有しているところ、吸水性ポリマー３Ｐの液吸収に伴う膨潤の影響が第１コア３の全体に比較的反映されやすく、第１コア３は液吸収後に嵩張りやすい。一方第２コア４は、接着剤を介して接合された２枚の基材シート４Ｓ間に吸水性ポリマー４Ｐが介在配置された構成を有しているため、吸水性ポリマー４Ｐの液吸収に伴う膨潤の影響が第２コア４の全体に比較的反映されにくく、第２コア４は液吸収後に嵩張りにくい。前記「第１コア３＞第２コア４」という大小関係は、このような両コア３，４の特性の違いを考慮の上、本発明の所定の効果が一層確実に奏されるようにするために採用されたものである。 From the viewpoint of improving the absorption performance of the absorber 1 while suppressing the degree of swelling due to the absorption of the liquid (excrement) of the entire absorber 1 and ensuring the flexibility of the absorber 1 after swelling, the above-mentioned It is more preferable to satisfy the magnitude relationship of "first core 3> second core 4". The first core 3 typically has a structure in which the water-absorbent polymer 3P is supported on an aggregate of the fiber material 3F, and the influence of swelling due to liquid absorption of the water-absorbent polymer 3P is the first core. It is relatively easy to be reflected in the whole of 3, and the first core 3 is easy to be bulky after liquid absorption. On the other hand, since the second core 4 has a structure in which the water-absorbent polymer 4P is interposed between the two base sheet 4S bonded via an adhesive, it accompanies the liquid absorption of the water-absorbent polymer 4P. The effect of swelling is relatively difficult to be reflected in the entire second core 4, and the second core 4 is less bulky after liquid absorption. The magnitude relationship of "first core 3> second core 4" ensures that the predetermined effect of the present invention is more reliably achieved in consideration of such a difference in characteristics between the two cores 3 and 4. It was adopted for this purpose.

前記の「第１コア３＞第２コア４」という大小関係に関し、第１コア３の吸水性ポリマー３Ｐの坪量と第２コア４の吸水性ポリマー４Ｐの坪量との比率は、前者＞後者を前提として、前者／後者として、好ましくは１．１以上、より好ましくは１．５以上、そして、好ましくは３以下、より好ましくは２．５以下である。
第１コア３の吸水性ポリマー３Ｐの坪量は、好ましくは４０ｇ／ｍ２以上、より好ましくは６０ｇ／ｍ２以上、そして、好ましくは４５０ｇ／ｍ２以下、より好ましくは３５０ｇ／ｍ２以下である。
第２コア４の吸水性ポリマー４Ｐの坪量は、好ましくは５０ｇ／ｍ２以上、より好ましくは８０ｇ／ｍ２以上、そして、好ましくは２００ｇ／ｍ２以下、より好ましくは１５０ｇ／ｍ２以下である。 Regarding the magnitude relationship of "first core 3> second core 4", the ratio of the basis weight of the water-absorbent polymer 3P of the first core 3 to the basis weight of the water-absorbent polymer 4P of the second core 4 is the former>. On the premise of the latter, the former / latter is preferably 1.1 or more, more preferably 1.5 or more, and preferably 3 or less, more preferably 2.5 or less.
The basis weight of the water-absorbent polymer 3P of the first core 3 is preferably 40 g / m 2 or more, more preferably 60 g / m 2 or more, and preferably 450 g / m 2 or less, more preferably 350 g / m 2 or less. is there.
The basis weight of the water-absorbent polymer 4P of the second core 4 is preferably 50 g / m 2 or more, more preferably 80 g / m 2 or more, and preferably 200 g / m 2 or less, more preferably 150 g / m 2 or less. is there.

第１コア３及び第２コア４において、吸水性ポリマー３Ｐ，４Ｐの分布形態は特に制限されず、当該コアの全体に均一に分布してもよく、当該コアの一部に偏在してもよいが、液吸収性、柔軟性等の諸性能のさらなる向上の観点から、前者が好ましい。 In the first core 3 and the second core 4, the distribution form of the water-absorbent polymers 3P and 4P is not particularly limited, and may be uniformly distributed throughout the core or may be unevenly distributed in a part of the core. However, the former is preferable from the viewpoint of further improving various performances such as liquid absorption and flexibility.

吸収体１の主たる特徴の１つとして、図１及び図２に示すように、第１コア３を挟んで縦方向Ｘの両側及び第１コア３を挟んで横方向Ｙの両側のうちの少なくとも一方の両側に、コアラップシート５と第２コア４とが第１コア３を介在させずに直接接合された接合部６が、一組以上の対となって存在しており、且つ第１コア３における接合部６の対に挟まれた部分が、コアラップシート５と第２コア４とによって厚み方向に圧縮された状態となっている点が挙げられる。 As one of the main features of the absorber 1, as shown in FIGS. 1 and 2, at least one of both sides in the vertical direction X across the first core 3 and both sides in the horizontal direction Y across the first core 3 On both sides of one side, there are one or more pairs of joints 6 in which the core wrap sheet 5 and the second core 4 are directly joined without interposing the first core 3, and the first one. A point is that the portion of the core 3 sandwiched between the pairs of the joint portions 6 is in a state of being compressed in the thickness direction by the core wrap sheet 5 and the second core 4.

接合部６において、コアラップシート５と第２コア４とを接合する手段は特に制限されず、接着剤、ヒートシール等の公知の接合手段を用いることができる。本実施形態では、後述するように接着剤を用いている。接合部６を構成する接着剤としては、吸収性物品における構成部材どうしの接合に使用されているものを特に制限無く用いることができ、例えば、ホットメルト接着剤を用いることができる。 In the joining portion 6, the means for joining the core wrap sheet 5 and the second core 4 is not particularly limited, and known joining means such as an adhesive and a heat seal can be used. In this embodiment, an adhesive is used as described later. As the adhesive constituting the joint portion 6, those used for joining the constituent members in the absorbent article can be used without particular limitation, and for example, a hot melt adhesive can be used.

第１コア３を挟んで縦方向Ｘの両側及び第１コア３を挟んで横方向Ｙの両側それぞれにおいて、接合部６の対が一組存在するか、複数組存在するかは、接合部６を形成する接着剤の塗布形態によって定まる。例えば図３（ａ）に示すように、接合部６（縦接合部６Ｘ）を形成する接着剤（後述する製造方法における接着剤３５Ａ，４６Ａ）が、第１コア３を挟んで横方向Ｙの両側それぞれにおいて、吸収体１の縦方向Ｘの全長にわたって連続的に塗布されている場合、該第１コア３を挟んで横方向Ｙの両側には接合部６の対が一組存在する。また図３（ｂ）に示すように、接合部６（縦接合部６Ｘ）を形成する接着剤が、第１コア３を挟んで横方向Ｙの両側それぞれにおいて、縦方向Ｘに所定間隔を置いて３カ所に間欠的に塗布されている場合、該第１コア３を挟んで横方向Ｙの両側には接合部６の対が三組存在する。以上、「第１コア３を挟んで横方向Ｙの両側」を例にとって説明したが、「第１コア３を挟んで縦方向Ｘの両側」についても同じであり、前述の説明が適用される。 Whether there is one pair of joints 6 or a plurality of pairs of joints 6 on both sides of the vertical direction X across the first core 3 and on both sides of the horizontal direction Y across the first core 3 is determined by the joint portion 6. It is determined by the application form of the adhesive that forms the above. For example, as shown in FIG. 3A, the adhesives (adhesives 35A, 46A in the manufacturing method described later) forming the joint portion 6 (vertical joint portion 6X) are located in the lateral direction Y with the first core 3 interposed therebetween. When the absorber 1 is continuously applied over the entire length of the absorber 1 on both sides in the vertical direction X, a pair of joints 6 exists on both sides in the horizontal direction Y with the first core 3 in between. Further, as shown in FIG. 3 (b), the adhesive forming the joint portion 6 (vertical joint portion 6X) places a predetermined interval in the vertical direction X on both sides of the horizontal direction Y with the first core 3 in between. When the coating is applied intermittently at three locations, there are three pairs of joints 6 on both sides of the first core 3 in the lateral direction Y. The above description has been made by taking "both sides of the horizontal direction Y across the first core 3" as an example, but the same applies to "both sides of the vertical direction X across the first core 3", and the above description is applied. ..

本実施形態では、図１に示すように、第１コア３が接合部６によって包囲されており、第１コア３の全体がコアラップシート５と第２コア４とによって厚み方向に圧縮された状態となっている。すなわち本実施形態では、後述するように、コアラップシート５及び第２コア４それぞれにおける第１コア３側の面の略全域に、接合部６を形成する接着剤（接着剤３５Ａ，４６Ａ）が塗布されており、該接着剤は第１コア３の周縁に沿って実質的に連続しているので、第１コア３は接合部６によって包囲されている。換言すれば、第１コア３の横方向Ｙの両外方に、第１コア３を挟んで横方向Ｙに相対向する一組の縦接合部６Ｘ，６Ｘの対が存在するとともに、第１コア３の縦方向Ｘの両外方に、第１コア３を挟んで縦方向Ｘに相対向する一組の横接合部６Ｙ，６Ｙの対が存在し、且つこれら二組の接合部６Ｘ，６Ｙは互いに連結し、その接合部６Ｘ，６Ｙの連結体が第１コア３を包囲している。なお、以下では、縦接合部６Ｘ、横接合部６Ｙを総合して「接合部６」ともいう。特に断らない限り、接合部６についての説明は、縦接合部６Ｘ及び横接合部６Ｙに適用される。 In the present embodiment, as shown in FIG. 1, the first core 3 is surrounded by the joint portion 6, and the entire first core 3 is compressed in the thickness direction by the core wrap sheet 5 and the second core 4. It is in a state. That is, in the present embodiment, as will be described later, the adhesives (adhesives 35A, 46A) forming the joint 6 form the joint portion 6 in substantially the entire area of the surface on the first core 3 side of each of the core wrap sheet 5 and the second core 4. The first core 3 is surrounded by the joint 6 because it is applied and the adhesive is substantially continuous along the periphery of the first core 3. In other words, on both outer sides of the first core 3 in the lateral direction Y, there is a pair of vertical joints 6X and 6X that face each other in the lateral direction Y with the first core 3 in between, and the first On both outer sides of the core 3 in the vertical direction X, there is a pair of horizontal joints 6Y and 6Y facing each other in the vertical direction X with the first core 3 in between, and these two sets of joints 6X, The 6Ys are connected to each other, and the connecting portions 6X and 6Y surround the first core 3. In the following, the vertical joint portion 6X and the horizontal joint portion 6Y are collectively referred to as “joint portion 6”. Unless otherwise specified, the description of the joint portion 6 applies to the vertical joint portion 6X and the horizontal joint portion 6Y.

吸収体１は前述したように、吸収性コア２が、第１コア３と、吸水性ポリマーを必須成分とする第２コア４との積層構造を有し、且つ第１コア３におけるコアラップシート５と第２コア４との接合部６の対に挟まれた部分が、コアラップシート５と第２コア４とによって厚み方向に圧縮された状態となっていることにより、吸収体１全体として高い吸収容量を有しつつも、***物吸収に伴う膨潤、特に第１コア３の膨潤が適度に抑制されるため、***物を吸収しても膨潤しにくく柔軟で保形性に優れる。つまり本発明では、吸収体の主体をなす吸収性コアを、本来的に膨潤度が高い（***物吸収後に嵩張りやすい）第１コアと、本来的に膨潤度が低い（***物吸収後に嵩張りにくい）第２コアとに区分し、且つ該第１コアを常時厚み方向に圧縮された状態にすることで、該吸収体全体として***物吸収後の膨潤を抑制しつつ、十分な吸収容量を確保できるようにした。このような技術思想に基づく本発明によれば、吸収体薄型化の要望にも十分に対応でき、比較的厚みが薄いにもかかわらず吸収容量が多く、且つ***物を吸収しても膨潤しにくく柔軟で保形性に優れる吸収体が得られる。 As described above, in the absorber 1, the absorbent core 2 has a laminated structure of the first core 3 and the second core 4 containing the water-absorbing polymer as an essential component, and the core wrap sheet in the first core 3 The portion sandwiched between the pair of the joint portion 6 between the 5 and the second core 4 is in a state of being compressed in the thickness direction by the core wrap sheet 5 and the second core 4, so that the absorber 1 as a whole Although it has a high absorption capacity, swelling due to excrement absorption, particularly swelling of the first core 3 is appropriately suppressed, so that it is difficult to swell even if excrement is absorbed, and it is flexible and has excellent shape retention. That is, in the present invention, the absorptive core, which is the main component of the absorber, has a first core having a high degree of swelling (easy to become bulky after absorption of excrement) and an inherently low degree of swelling (bulky after absorption of excrement). By dividing the first core into a second core (which is difficult to stretch) and keeping the first core always compressed in the thickness direction, the entire absorber suppresses swelling after excrement absorption and has a sufficient absorption capacity. I made it possible to secure. According to the present invention based on such a technical idea, it is possible to sufficiently meet the demand for thinning the absorber, the absorption capacity is large despite the relatively thin thickness, and the excrement is swollen even if it is absorbed. An absorber that is difficult, flexible, and has excellent shape retention can be obtained.

また本実施形態では、図１及び図２に示すように、第１コア３は、該第１コア３における接合部６（６Ｘ，６Ｙ）の対に挟まれた部分に、該第１コア３の厚み方向の全域にわたって該第１コア３の形成材料が存在しない形成材料非存在部３Ｎを有し、該形成材料非存在部３Ｎにおいて、コアラップシート５と第２コア４（基材シート４Ｓ）とが接合されているため、接合部６の対に挟まれた部分において第１コア３が一層確実に厚み方向に圧縮され、且つその圧縮状態の安定性が向上しており、そのため、第１コア３が圧縮された状態であることによる作用効果がより一層確実に奏される。 Further, in the present embodiment, as shown in FIGS. 1 and 2, the first core 3 is formed in a portion of the first core 3 sandwiched between pairs of joints 6 (6X, 6Y). The core wrap sheet 5 and the second core 4 (base sheet 4S) have a forming material non-existing portion 3N in which the forming material of the first core 3 does not exist over the entire area in the thickness direction of the first core 3. ) Is joined, so that the first core 3 is more reliably compressed in the thickness direction at the portion sandwiched between the pairs of the joint portions 6, and the stability of the compressed state is improved. The action and effect of the compressed state of 1 core 3 is more reliably achieved.

吸収体１において、第１コア３における接合部６（６Ｘ，６Ｙ）の対に挟まれた部分（以下、「接合部対間存在部」とも言う。）は前述したとおり、コアラップシート５と第２コア４とによって常時厚み方向に圧縮された状態であるので、該接合部対間存在部をその圧縮された状態から解放したときの、吸収体１の該接合部対間存在部での厚み（吸収体１の平面視における該接合部対間存在部と重複する部分の厚み）は、該圧縮された状態からの解放前に比べて厚くなる。つまり、「第１コア３の前記接合部対間存在部が圧縮された状態から解放される前の、吸収体１の該接合部対間存在部での厚み」をＴ１、「第１コア３の前記接合部対間存在部が圧縮された状態から解放された後の、吸収体１の該接合部対間対応部での厚み」をＴ２とした場合、Ｔ２＞Ｔ１の大小関係が成立し、且つ厚み差Ｔ２−Ｔ１は、誤差範囲を超えた有意差のある数値となる。 In the absorber 1, the portion sandwiched between the pairs of the joint portions 6 (6X, 6Y) in the first core 3 (hereinafter, also referred to as “joint portion paired existing portion”) is the core wrap sheet 5 as described above. Since it is in a state of being constantly compressed in the thickness direction by the second core 4, when the joint portion paired existing portion is released from the compressed state, the absorber 1 is in the joint interpaired existing portion. The thickness (thickness of the portion of the absorber 1 that overlaps the inter-paired portion in the plan view) is thicker than that before the release from the compressed state. That is, the "thickness of the absorber 1 at the joint-to-pair existence portion of the first core 3 before being released from the compressed state" is set to T1 and "first core 3". When the "thickness of the absorber 1 at the joint-to-joint correspondence portion after being released from the compressed state" is T2, the magnitude relationship of T2> T1 is established. Moreover, the thickness difference T2-T1 is a numerical value having a significant difference beyond the error range.

なお、前記の「圧縮された状態からの解放」は、第１コア３と厚み方向に隣接してこれを同方向に圧縮している第２コア４及びコアラップシート５どうしの接合部６（６Ｘ，６Ｙ）を破壊するなどして、第２コア４及び／又はコアラップシート５の残留応力を除去することで実施できる。典型的には、コアラップシート５における、第１コア３の周縁（例えば、第１コア３の縦方向Ｘに沿う両側縁）からの延出部を切断することで、第１コア３（前記接合部対間存在部）を圧縮された状態から解放することができる。 The above-mentioned "release from the compressed state" is the joint portion 6 between the second core 4 and the core wrap sheet 5 which are adjacent to the first core 3 in the thickness direction and are compressed in the same direction. It can be carried out by removing the residual stress of the second core 4 and / or the core wrap sheet 5 by breaking 6X, 6Y) or the like. Typically, by cutting the extending portion of the core wrap sheet 5 from the peripheral edge of the first core 3 (for example, both side edges of the first core 3 along the longitudinal direction X), the first core 3 (for example, the above). It is possible to release the joint (inter-to-interval part) from the compressed state.

厚み差Ｔ２−Ｔ１の数値が大きいほど、第１コア３の圧縮の程度が大きくなるため、第１コア３の***物吸収に伴う膨潤の抑制効果が向上し得るが、厚み差Ｔ２−Ｔ１が大きすぎると、第１コア３の吸収容量が低下することが懸念される。このような点を考慮すると、厚み差Ｔ２−Ｔ１は、Ｔ２＞Ｔ１を前提として、好ましくは０．０８ｍｍ以上、より好ましくは０．１ｍｍ以上、そして、好ましくは１．００ｍｍ以下、より好ましくは０．９５ｍｍ以下である。
Ｔ１，Ｔ２をはじめとする吸収体の各部の厚みは、以下の方法で測定することができる。下記の測定方法は、吸収性物品の各部の厚みの測定にも利用できる。 The larger the value of the thickness difference T2-T1, the greater the degree of compression of the first core 3, so that the effect of suppressing swelling due to the absorption of excrement of the first core 3 can be improved. If it is too large, there is a concern that the absorption capacity of the first core 3 will decrease. Considering these points, the thickness difference T2-T1 is preferably 0.08 mm or more, more preferably 0.1 mm or more, and preferably 1.00 mm or less, more preferably 0, on the premise of T2> T1. It is .95 mm or less.
The thickness of each part of the absorber including T1 and T2 can be measured by the following method. The following measuring method can also be used to measure the thickness of each part of the absorbent article.

＜厚みの測定方法＞
測定対象物（例えば吸収体）を水平な場所にシワや折れ曲がりがないように静置し、測定対象物における厚み測定対象部位（例えば吸収体における前記接合部対間存在部）に３．７ｇｆ／ｃｍ２（０．３６ｋＰａ）の圧力をかけつつ厚みを測定する。厚みの測定には、市販の厚み測定器（例えば、ＴＥＣＬＯＣＫ社製、定圧厚さ測定器、型式ＰＧ−１１）を用いる。１つの測定対象部位につき５回測定し、５回の測定値の平均値における０．００１ｍｍ未満の値を四捨五入したものを、当該測定対象部位の厚みとする。 <Thickness measurement method>
The object to be measured (for example, the absorber) is placed on a horizontal surface so as not to be wrinkled or bent, and the thickness of the object to be measured is 3.7 gf / The thickness is measured while applying a pressure of cm 2 (0.36 kPa). A commercially available thickness measuring device (for example, a constant pressure thickness measuring device manufactured by TECLOCK, model PG-11) is used for measuring the thickness. The thickness of the measurement target part is defined as the thickness of the measurement target part, which is measured 5 times for one measurement target part and rounded off to the value of less than 0.001 mm in the average value of the 5 measurement values.

厚み差Ｔ２−Ｔ１の調整は、後述する吸収体１の製造方法において、第１コア３に重ねて第２コア４又はコアラップシート５を配置する工程（第２コア配置工程又はコアラップシート配置工程）で、第１コア３に対する第２コア４又はコアラップシート５による押圧力を調整する等することで実施可能である。 The adjustment of the thickness difference T2-T1 is a step of arranging the second core 4 or the core wrap sheet 5 on the first core 3 in the method of manufacturing the absorber 1 described later (second core arranging step or core wrap sheet arranging). In the step), it can be carried out by adjusting the pressing force of the second core 4 or the core wrap sheet 5 with respect to the first core 3.

第１コア３の第２コア４との接触圧（形成材料非存在部３Ｎ以外の部分での接触圧）は、好ましくは０．０５ｋＰａ以上、より好ましくは０．０７ｋＰａ以上である。すなわち吸収体１は、該吸収体１の製造工程において第１コア３と第２コア４との接触圧が０．０５ｋＰａ以上となるように調整されたものである。前記接触圧が前記範囲にあることで、本発明の所定の効果（第１コア３が常時厚み方向に圧縮された状態にあることによる効果）がより一層確実に奏される。特に本実施形態のように、第１コア３が形成材料非存在部３Ｎを有している場合、液吸収に伴う膨潤後の保形性の低下が懸念されるが、前記接触圧が前記範囲にあることで斯かる懸念は払拭され得る。
前記接触圧の上限は特に制限されないが、第１コア３の吸収性能や保形性等の諸性能のバランスの観点から、好ましくは０．２ｋＰａ以下、より好ましくは０．１ｋＰａ以下である。
前記接触圧は、吸収体の製造ラインにおいて、市販の接触圧測定器（例えば、（株）エイエムアイテクノ製のエアパック式接触圧測定器（測定操作：AMI3037-2））を用い、該測定器のマニュアルに従って測定することができる。例えば、後述する吸収体の製造方法の第１実施形態では、一方向に搬送されるコアラップシート５上に第１コア３を配置し（第１コア配置工程）、更に該第１コア３を覆うように第２コア４を配置する（第２コア配置工程）ところ、この第２コア４の配置直後に前記接触圧を測定する。また、後述する吸収体の製造方法の第２実施形態では、一方向に搬送される第２コア４上に第１コア３を配置し（第１コア配置工程）、更に該第１コア３を覆うようにコアラップシート５を配置する（コアラップシート配置工程）ところ、このコアラップシート５の配置直後に前記接触圧を測定する。
前記接触圧は、後述する吸収体の製造方法の第１実施形態において、第２コア４で第１コア３をコアラップシート５側に押圧する際（第２コア配置工程）の押圧力を調整することで調整可能である。また前記接触圧は、後述する吸収体の製造方法の第２実施形態において、コアラップシート５で第１コア３を第２コア４側に押圧する際（コアラップシート配置工程）の押圧力を調整することで調整可能である。 The contact pressure of the first core 3 with the second core 4 (contact pressure at a portion other than the portion where the forming material does not exist 3N) is preferably 0.05 kPa or more, more preferably 0.07 kPa or more. That is, the absorber 1 is adjusted so that the contact pressure between the first core 3 and the second core 4 is 0.05 kPa or more in the manufacturing process of the absorber 1. When the contact pressure is in the above range, the predetermined effect of the present invention (the effect of the first core 3 being always compressed in the thickness direction) is more reliably achieved. In particular, when the first core 3 has the forming material non-existing portion 3N as in the present embodiment, there is a concern that the shape retention after swelling due to liquid absorption may decrease, but the contact pressure is within the above range. Such concerns can be dispelled by being in.
The upper limit of the contact pressure is not particularly limited, but is preferably 0.2 kPa or less, more preferably 0.1 kPa or less, from the viewpoint of balancing various performances such as absorption performance and shape retention of the first core 3.
The contact pressure is measured by using a commercially available contact pressure measuring device (for example, an air pack type contact pressure measuring device manufactured by AMI Techno Co., Ltd. (measurement operation: AMI3037-2)) in the absorber production line. It can be measured according to the manual of the vessel. For example, in the first embodiment of the absorber manufacturing method described later, the first core 3 is arranged on the core wrap sheet 5 conveyed in one direction (first core arrangement step), and the first core 3 is further arranged. When the second core 4 is arranged so as to cover it (second core arrangement step), the contact pressure is measured immediately after the arrangement of the second core 4. Further, in the second embodiment of the absorber manufacturing method described later, the first core 3 is arranged on the second core 4 conveyed in one direction (first core arrangement step), and the first core 3 is further arranged. When the core wrap sheet 5 is arranged so as to cover it (core wrap sheet arrangement step), the contact pressure is measured immediately after the arrangement of the core wrap sheet 5.
The contact pressure adjusts the pressing force when the first core 3 is pressed toward the core wrap sheet 5 by the second core 4 in the first embodiment of the absorber manufacturing method described later (second core arranging step). It can be adjusted by doing. Further, the contact pressure is the pressing force when pressing the first core 3 toward the second core 4 side with the core wrap sheet 5 (core wrap sheet arranging step) in the second embodiment of the absorber manufacturing method described later. It can be adjusted by adjusting.

吸収体１は吸収性物品の吸収体として使用される。ここでいう「吸収性物品」には、人体から排出される体液（尿、軟便、経血、汗等）の吸収に用いられる物品が広く包含され、例えば、使い捨ておむつ、生理用ナプキン、生理用ショーツ、失禁パッド等が包含される。吸収性物品は、典型的には、吸収体と、該吸収体よりも着用者の肌から近い側に配される液透過性の表面シートと、該吸収体よりも着用者の肌から遠い側に配される液難透過性ないし不透過性の裏面シートとを含んで構成されている。 The absorber 1 is used as an absorber of an absorbent article. The term "absorbable article" as used herein broadly includes articles used for absorbing body fluids (urine, loose stool, menstrual blood, sweat, etc.) discharged from the human body, and includes, for example, disposable diapers, sanitary napkins, and sanitary napkins. Includes shorts, incontinence pads, etc. Absorbent articles typically include an absorber, a liquid permeable surface sheet located closer to the wearer's skin than the absorber, and a side farther from the wearer's skin than the absorber. It is configured to include a poorly permeable or impermeable back sheet to be arranged in the water.

次に、本発明の吸収体の製造方法について、前述した吸収体１の製造方法を例にとり図面を参照しながら説明する。図４には、吸収体１の製造方法の第１実施形態の実施に使用可能な製造装置の一実施形態である製造装置１０の概略構成が示されている。製造装置１０は、第１コア３を製造する第１コア製造部２０と、該第１コア製造部２０で製造された第１コア３を受け取って搬送する第１搬送部３０と、第２コア４を製造する第２コア製造部４０と、該第２コア製造部４０で製造された第２コア４を受け取って搬送する第２搬送部５０とを含んで構成されている。なお、以下では、コアラップシート５（吸収体１）の搬送方向（流れ方向）をＭＤ１、基材シート４Ｓ（４Ｓ１，４Ｓ２）の搬送方向（流れ方向）をＭＤ２，ＭＤ３、第２コア４の搬送方向（流れ方向）をＭＤ４ともいう。 Next, the method for producing the absorber of the present invention will be described with reference to the drawings, taking the above-mentioned method for producing the absorber 1 as an example. FIG. 4 shows a schematic configuration of a manufacturing apparatus 10 which is an embodiment of a manufacturing apparatus that can be used in the embodiment of the first embodiment of the manufacturing method of the absorber 1. The manufacturing apparatus 10 includes a first core manufacturing unit 20 that manufactures the first core 3, a first transport unit 30 that receives and transports the first core 3 manufactured by the first core manufacturing unit 20, and a second core. It is configured to include a second core manufacturing unit 40 for manufacturing 4 and a second transporting unit 50 for receiving and transporting the second core 4 manufactured by the second core manufacturing unit 40. In the following, the transport direction (flow direction) of the core wrap sheet 5 (absorbent 1) is MD1, the transport direction (flow direction) of the base sheet 4S (4S1, 4S2) is MD2, MD3, and the second core 4. The transport direction (flow direction) is also referred to as MD4.

第１コア製造部２０は、外周面２１Ｓに複数の集積用凹部（図示せず）が所定の間隔で形成された積繊ドラム２１と、コア形成材料（第１実施形態の製造方法では繊維材料３Ｆ及び吸水性ポリマー３Ｐ）を、空気流に随伴させて、積繊ドラム２１の外周面に供給するダクト２２とを備えている。ダクト２２は、その内部を流れる空気流の上流側端（図示せず）が繊維材料導入装置（図示せず）に接続され、下流側端が積繊ドラム２１の外周面２１Ｓの一部を覆っている。前記繊維材料導入装置は、繊維材料３Ｆを主体とする原料シート（図示せず）を解繊し、ダクト２２内に該繊維材料３Ｆを供給するものである。また、ダクト２２における前記上流側端と前記下流側端との間に位置する部分には、吸水性ポリマー３Ｐをダクト２２の内部に導入する導入装置（図示せず）が設けられている。 The first core manufacturing unit 20 includes a fiber drum 21 in which a plurality of accumulation recesses (not shown) are formed on the outer peripheral surface 21S at predetermined intervals, and a core forming material (fiber material in the manufacturing method of the first embodiment). 3F and the water-absorbent polymer 3P) are provided with a duct 22 that accompanies the air flow and supplies it to the outer peripheral surface of the fiber stacking drum 21. The upstream end (not shown) of the air flow flowing inside the duct 22 is connected to the fiber material introduction device (not shown), and the downstream end covers a part of the outer peripheral surface 21S of the fiber stacking drum 21. ing. The fiber material introduction device defibrate a raw material sheet (not shown) mainly composed of the fiber material 3F, and supplies the fiber material 3F into the duct 22. Further, an introduction device (not shown) for introducing the water-absorbent polymer 3P into the inside of the duct 22 is provided at a portion of the duct 22 located between the upstream end and the downstream end.

積繊ドラム２１は、金属製の剛体からなる円筒状のドラム本体２１０と、該ドラム本体２１０の外周部に重ねて配され、積繊ドラム２１の外周面２１Ｓを形成する外周部材２１１とを含んで構成されている。外周部材２１１は、モータ等の原動機からの動力を受けて、水平な回転軸を回転中心として、図４中の矢印Ｒ１方向に回転駆動されるようになされているが、ドラム本体２１０は、固定されていて回転しない。ドラム本体２１０の内部は、その周方向に複数の空間Ａ，Ｂ，Ｃに仕切られている。また、ドラム本体２１０には、その内部を減圧する減圧機構（図示せず）が接続されており、該減圧機構の駆動により、空間ＡないしＣを負圧に維持可能になされている。 The fiber stacking drum 21 includes a cylindrical drum body 210 made of a rigid metal body, and an outer peripheral member 211 which is arranged so as to overlap the outer peripheral portion of the drum body 210 and forms the outer peripheral surface 21S of the fiber stacking drum 21. It is composed of. The outer peripheral member 211 receives power from a prime mover such as a motor and is rotationally driven in the direction of arrow R1 in FIG. 4 with a horizontal rotation axis as a rotation center, but the drum body 210 is fixed. It is done and does not rotate. The inside of the drum body 210 is divided into a plurality of spaces A, B, and C in the circumferential direction thereof. Further, a depressurizing mechanism (not shown) for depressurizing the inside of the drum main body 210 is connected, and the space A to C can be maintained at a negative pressure by driving the depressurizing mechanism.

積繊ドラム２１は、外周部がダクト２２で覆われている空間Ａが、内部側からの吸引によってコア形成材料の積繊が可能な積繊ゾーンとなされている。空間Ａを負圧に維持した状態で、外周部材２１１を矢印Ｒ１方向に回転させると、外周部材２１１に形成された集積用凹部（図示せず）が空間Ａ上を通過している間、該集積用凹部の底部に空間Ａ内の負圧が作用し、該底部に形成された多数の吸引孔を通じた空気の吸引が行われる。この吸引孔を通じた吸引により、ダクト２２内を搬送されてきたコア形成材料が、該集積用凹部へと導かれてその底部上に積繊し、その積繊物である第１コア３が形成される。一方、通常、積繊ドラム２１の空間Ｂは、空間Ａよりも弱い負圧又は圧力ゼロ（大気圧）に設定され、また、空間Ｃは、該集積用凹部内の積繊物の転写位置及びその前後を含む領域であるので、圧力ゼロ又は陽圧に設定される。前記集積用凹部は、製造する第１コア３に付与すべき形状に対応した形状を有している。第１実施形態の製造方法では前述したように、第１コア製造部２０の製造目的物である第１コア３が形成材料非存在部３Ｎを有しているので、前記集積用凹部の底部における形成材料非存在部３Ｎに対応する部位は、周辺部に比して積繊ドラム２１の径方向外方に突出しており、これにより、該部位にコア形成材料が積繊することが阻害される。 In the fiber stacking drum 21, the space A whose outer peripheral portion is covered with the duct 22 is formed as a fiber stacking zone in which the core forming material can be laminated by suction from the inside. When the outer peripheral member 211 is rotated in the direction of arrow R1 while the space A is maintained at a negative pressure, the accumulation recess (not shown) formed in the outer peripheral member 211 passes over the space A. A negative pressure in the space A acts on the bottom of the accumulation recess, and air is sucked through a large number of suction holes formed in the bottom. By suction through the suction holes, the core forming material conveyed in the duct 22 is guided to the accumulation recess and is laminated on the bottom thereof, and the first core 3 which is the laminated fiber is formed. Will be done. On the other hand, normally, the space B of the fiber stacking drum 21 is set to a negative pressure or a pressure of zero (atmospheric pressure) weaker than the space A, and the space C is the transfer position and the transfer position of the fiber stack in the accumulation recess. Since it is a region including before and after that, the pressure is set to zero or positive pressure. The integration recess has a shape corresponding to the shape to be imparted to the first core 3 to be manufactured. In the manufacturing method of the first embodiment, as described above, since the first core 3 which is the manufacturing target of the first core manufacturing section 20 has the forming material non-existing portion 3N, it is located at the bottom of the accumulation recess. The portion corresponding to the portion 3N in which the forming material does not exist protrudes outward in the radial direction of the fiber stacking drum 21 as compared with the peripheral portion, which prevents the core forming material from stacking in the portion. ..

前記集積用凹部に形成された第１コア３は、外周部材２１１の回転により積繊ドラム２１の下部へ搬送され、エアー吐出装置２３からのエアーの吐出によって、該集積用凹部から離型されて第１搬送部３０へと移行する。 The first core 3 formed in the accumulation recess is conveyed to the lower part of the fiber stacking drum 21 by the rotation of the outer peripheral member 211, and is separated from the integration recess by the air discharge from the air discharge device 23. It shifts to the first transport unit 30.

第１搬送部３０は、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段３１を備え、該搬送手段３１は、図４中の矢印Ｒ２方向に周回する無端状のコンベアベルト３２と、該コンベアベルト３２の周回軌道内に設置された吸引手段としてのサクションボックス３３とを含んで構成されている。コンベアベルト３２は被搬送物の搬送面を形成するもので、通気性を有している。コンベアベルト３２は例えば、多数の吸引孔（図示せず）を有するメッシュベルトからなる。サクションボックス３３は、コンベアベルト３２を挟んで、エアー吐出装置２３と対向する位置に設置されており、エアー吐出装置２３から吹き出された空気を吸引できるようになっている。コンベアベルト３２上には、第１コア３が前記集積用凹部から離型されてコンベアベルト３２上に配置される前に予めコアラップシート５が供給されており、前記集積用凹部から離型された第１コア３は、コアラップシート５上に配置された状態で、第２搬送部５０へと搬送される。また第１搬送部３０は、コアラップシート５上に配置された第１コア３をコアラップシート５側に押圧する押圧ロール３６を備えており、第１コア３は、第２搬送部５０に供給される前（第２コア４が重ねられる前）に、押圧ロール３６によって厚み方向に圧縮される。 The first transport unit 30 includes a transport means 31 capable of sucking and transporting an object to be transported on the transport surface, and the transport means 31 includes an endless conveyor belt 32 orbiting in the direction of arrow R2 in FIG. The conveyor belt 32 includes a suction box 33 as a suction means installed in the orbit. The conveyor belt 32 forms a transport surface for the object to be transported, and has air permeability. The conveyor belt 32 is composed of, for example, a mesh belt having a large number of suction holes (not shown). The suction box 33 is installed at a position facing the air discharge device 23 with the conveyor belt 32 interposed therebetween, and can suck the air blown out from the air discharge device 23. A core wrap sheet 5 is supplied to the conveyor belt 32 in advance before the first core 3 is separated from the accumulation recess and placed on the conveyor belt 32, and is released from the integration recess. The first core 3 is transported to the second transport unit 50 in a state of being arranged on the core wrap sheet 5. Further, the first transport unit 30 includes a pressing roll 36 that presses the first core 3 arranged on the core wrap sheet 5 toward the core wrap sheet 5, and the first core 3 is attached to the second transport unit 50. Before being supplied (before the second core 4 is stacked), it is compressed in the thickness direction by the pressing roll 36.

製造装置１０では、図４に示すように、長尺のコアラップシート５がロール状に巻回された原反５Ｒからコアラップシート５を連続的に巻き出し、第１搬送部３０のコンベアベルト３２上に供給するところ、そのコンベアベルト３２への供給途中で、コアラップシート５におけるコンベアベルト３２上にて第１コア３が配置される面（上面）に、塗布手段３４，３５により接着剤３４Ａ，３５Ａを塗布する（接着剤塗布工程）。前記接着剤塗布工程は、一方向に搬送されるコアラップシート５上に第１コア３を配置する前（第１コア配置工程の実施前）に、コアラップシート５における第１コア３の配置面（上面）に接着剤３４Ａ，３５Ａを塗布する工程である。具体的には前記接着剤塗布工程では、図４に示すように、コアラップシート５の一方の面（コンベアベルト３２上での上面）におけるＣＤの両側部５Ｂ，５Ｂに、塗布手段３４により接着剤３４Ａを連続的に塗布し、また、該一方の面におけるＣＤの中央部５Ａに、塗布手段３５により接着剤３５Ａを連続的に塗布する。第１実施形態の製造方法では、塗布手段３４が塗布手段３５よりもＭＤ１の上流側に配置されており、したがって、接着剤３４Ａが接着剤３５Ａよりも先にコアラップシート５に塗布される。コアラップシート５のＣＤの中央部５Ａは、第１コア製造部２０で製造された第１コア３が配置される部分であり、両側部５Ｂ，５Ｂは、それぞれ、第１コア３側に折り返されて第１コア３に重ねられる部分である（図５参照）。 In the manufacturing apparatus 10, as shown in FIG. 4, the core wrap sheet 5 is continuously unwound from the original fabric 5R in which the long core wrap sheet 5 is wound in a roll shape, and the conveyor belt of the first transport unit 30 is used. When the adhesive is supplied onto the conveyor belt 32, the adhesive is applied to the surface (upper surface) of the core wrap sheet 5 on which the first core 3 is arranged on the conveyor belt 32 by the coating means 34 and 35. Apply 34A and 35A (adhesive application step). In the adhesive application step, the first core 3 is arranged on the core wrap sheet 5 before the first core 3 is arranged on the core wrap sheet 5 conveyed in one direction (before the implementation of the first core arrangement step). This is a step of applying the adhesives 34A and 35A to the surface (upper surface). Specifically, in the adhesive coating step, as shown in FIG. 4, the coating means 34 adheres to both side portions 5B and 5B of the CD on one surface (upper surface on the conveyor belt 32) of the core wrap sheet 5. The agent 34A is continuously applied, and the adhesive 35A is continuously applied to the central portion 5A of the CD on one surface by the coating means 35. In the manufacturing method of the first embodiment, the coating means 34 is arranged on the upstream side of the MD1 with respect to the coating means 35, and therefore the adhesive 34A is applied to the core wrap sheet 5 before the adhesive 35A. The central portion 5A of the CD of the core wrap sheet 5 is a portion where the first core 3 manufactured by the first core manufacturing unit 20 is arranged, and both side portions 5B and 5B are folded back to the first core 3 side, respectively. It is a part that is overlapped with the first core 3 (see FIG. 5).

第１実施形態の前記接着剤塗布工程では、コアラップシート５の第１コア３の配置面（上面）におけるＣＤの中央部５Ａと両側部５Ｂ，５Ｂとで、接着剤３４Ａ，３５Ａの塗布パターンを異ならせている。具体的には図５に示すように、接着剤３４Ａは、両側部５Ｂ，５Ｂにおいて平面視でＭＤ１（コアラップシート５の長手方向）に延びる連続線状に塗布され、接着剤３５Ａは、中央部５Ａにおいて平面視でＭＤ１に延びるスパイラル状に塗布される。接着剤３４Ａ，３５Ａが塗布された後のコアラップシート５の一方の面において、両側部５Ｂ，５Ｂそれぞれには、平面視連続線状の接着剤３４Ａの塗布部がＣＤに複数（図５では４本）並べて配置され、中央部５Ａには、平面視スパイラル状の接着剤３５Ａの塗布部がＣＤに複数（図５では５本）並べて配置される。コアラップシート５における接着剤３４Ａが連続線状に塗布された部分は、接着剤３４Ａがいわゆる「べた塗り」された部分であり、該部分の全域に接着剤３４Ａが付着している。一方、コアラップシート５における接着剤３５Ａがスパイラル状に塗布された部分は、接着剤３５Ａが螺旋を描くようにＭＤ１に延在しており、接着剤３５Ａの付着部と非付着部とがＭＤ１に交互に存在している。なお、接着剤３４Ａ，３５Ａの塗布パターンは図示のものに制限されず、任意に設定し得る。 In the adhesive coating step of the first embodiment, the coating patterns of the adhesives 34A and 35A are formed on the central portion 5A and the side portions 5B and 5B of the CD on the arrangement surface (upper surface) of the first core 3 of the core wrap sheet 5. Is different. Specifically, as shown in FIG. 5, the adhesive 34A is applied in a continuous line extending in the MD1 (longitudinal direction of the core wrap sheet 5) in a plan view on both side portions 5B and 5B, and the adhesive 35A is applied to the center. In part 5A, it is applied in a spiral shape extending to MD1 in a plan view. On one surface of the core wrap sheet 5 after the adhesives 34A and 35A have been applied, a plurality of continuous linear adhesive 34A application portions in a plan view are provided on the CD on both side portions 5B and 5B (in FIG. 5). (4) are arranged side by side, and in the central portion 5A, a plurality of coating portions of the adhesive 35A having a spiral shape in a plan view (5 in FIG. 5) are arranged side by side. The portion of the core wrap sheet 5 to which the adhesive 34A is applied in a continuous linear manner is a portion where the adhesive 34A is so-called "solid coating", and the adhesive 34A adheres to the entire area of the portion. On the other hand, in the core wrap sheet 5, the portion where the adhesive 35A is applied in a spiral shape extends to the MD1 so that the adhesive 35A spirals, and the adhesive portion and the non-adhesive portion of the adhesive 35A extend to the MD1. It exists alternately in. The coating patterns of the adhesives 34A and 35A are not limited to those shown in the figure, and can be set arbitrarily.

第２コア製造部４０で実施される第２コア４の製造工程は、図４に示すように、一方向に搬送される長尺の基材シート４Ｓの一方の面に接着剤を付与した後、更に吸水性ポリマー４Ｐを散布し付着させる吸水性ポリマー散布工程と、該基材シート４Ｓの一方の面に別の長尺の基材シートを重ね合わせて長尺の第２コア４を得る工程とを有する。この「別の長尺の基材シート」にも吸水性ポリマーを散布してもよい。 As shown in FIG. 4, the manufacturing process of the second core 4 carried out by the second core manufacturing unit 40 is performed after applying an adhesive to one surface of the long base sheet 4S transported in one direction. Further, a step of spraying the water-absorbent polymer 4P and adhering the water-absorbent polymer 4P, and a step of superimposing another long base material sheet on one surface of the base material sheet 4S to obtain a long second core 4. And have. The water-absorbent polymer may also be sprayed on this "another long base sheet".

更に説明すると、第２コア製造部４０では、第２コア４を構成する２枚の基材シート４Ｓそれぞれに塗布手段４１，４２により接着剤４１Ａ，４２Ａを塗布した後、両シート４Ｓのうちの少なくとも一方の接着剤塗布面に、散布手段４３により吸水性ポリマー４Ｐを散布し、しかる後、両シート４Ｓどうしをそれぞれの接着剤塗布面を内側にして重ね合わせて、長尺の第２コア４を製造する。なお、図４では、２枚の基材シート４Ｓのうちの一方（第１コア３と接触する基材シート）を４Ｓ１、他方を４Ｓ２としている。 Further, in the second core manufacturing unit 40, after applying the adhesives 41A and 42A to the two base sheet 4S constituting the second core 4 by the coating means 41 and 42, respectively, of the two sheets 4S. The water-absorbent polymer 4P is sprayed on at least one adhesive-coated surface by the spraying means 43, and then the two sheets 4S are overlapped with each adhesive-coated surface on the inside to form a long second core 4 To manufacture. In FIG. 4, one of the two base sheet 4S (the base sheet in contact with the first core 3) is 4S1 and the other is 4S2.

より具体的には第２コア製造部４０では、図４に示すように、長尺の基材シート４Ｓ１がロール状に巻回された原反４Ｒ１から基材シート４Ｓ１を連続的に巻き出し、基材シート４Ｓ１の一方の面（他方の基材シート４Ｓ２との対向面）に塗布手段４１により接着剤４１Ａを塗布する。また、これと並行して、長尺の基材シート４Ｓ２がロール状に巻回された原反４Ｒ２から基材シート４Ｓ２を連続的に巻き出し、基材シート４Ｓ２の一方の面（他方の基材シート４Ｓ１との対向面）に塗布手段４２により接着剤４２Ａを塗布する。第１実施形態の製造方法では、図６に示すように、第１コア３と接触する基材シート４Ｓ１に塗布される接着剤４１Ａは、平面視で基材シート４Ｓ１の搬送方向（長手方向）ＭＤ２に延びるスパイラル状に塗布され、吸水性ポリマー４Ｐが直接散布される基材シート４Ｓ２に塗布される接着剤４２Ａは、該シート４Ｓ２の一方の面のほぼ全域に塗布（いわゆるべた塗り）される。接着剤４１Ａが塗布された後の基材シート４Ｓ１の一方の面には、平面視スパイラル状の接着剤４１Ａの塗布部がＣＤに複数（図８では８本）並べて配置され、該一方の面の略全域に接着剤４１Ａがスパイラル状に塗布される。なお、接着剤４１Ａ，４２Ａの塗布パターンは図示のものに制限されず、任意に設定し得る。 More specifically, in the second core manufacturing unit 40, as shown in FIG. 4, the base sheet 4S1 is continuously unwound from the raw fabric 4R1 in which the long base sheet 4S1 is wound in a roll shape. The adhesive 41A is applied to one surface of the base sheet 4S1 (the surface facing the other base sheet 4S2) by the coating means 41. Further, in parallel with this, the base sheet 4S2 is continuously unwound from the original fabric 4R2 in which the long base sheet 4S2 is wound in a roll shape, and one surface (the other base) of the base sheet 4S2 is continuously unwound. The adhesive 42A is applied to the material sheet 4S1) by the application means 42. In the manufacturing method of the first embodiment, as shown in FIG. 6, the adhesive 41A applied to the base sheet 4S1 in contact with the first core 3 is the transport direction (longitudinal direction) of the base sheet 4S1 in a plan view. The adhesive 42A, which is applied in a spiral shape extending to the MD2 and is applied to the base sheet 4S2 on which the water-absorbent polymer 4P is directly sprayed, is applied to almost the entire surface of one surface of the sheet 4S2 (so-called solid coating). .. On one surface of the base sheet 4S1 after the adhesive 41A is applied, a plurality of coated portions of the adhesive 41A in a plan view spiral shape (8 in FIG. 8) are arranged side by side on the CD, and the one surface is arranged. The adhesive 41A is spirally applied to substantially the entire area of the above. The coating patterns of the adhesives 41A and 42A are not limited to those shown in the figure, and can be set arbitrarily.

散布手段４３は、吸水性ポリマー４Ｐの散布対象（基材シート４Ｓ）から上方に所定距離離間した位置に配置されている。散布手段４３から散布された吸水性ポリマー４Ｐは、自重により落下して、散布手段４３の下方を搬送中の基材シート４Ｓ（４Ｓ２）の一方の面に付着する。なお、第１実施形態の製造方法では、両シート４Ｓ１，４Ｓ２のうちの一方に吸水性ポリマーを散布しているが、本発明では、両方に吸水性ポリマーを散布してもよい。散布手段４３は、搬送中の基材シート４Ｓの所定位置に所定量の吸水性ポリマー４Ｐの粒子を精度よく散布し得るものであればよく、その構成は特に制限されない。第１実施形態の製造方法では、散布手段４３として、「内部に粉粒体を貯蔵可能であり且つ該粉粒体の排出口を有するホッパーと、該ホッパーの下方に位置し且つ該排出口から排出された該粉粒体を散布位置まで搬送して散布する搬送手段とを備え、該搬送手段が、該排出口から排出された該粉粒体を受け取る受取手段と、該受取手段を振動させる振動発生手段とを有し、該振動発生手段により該受取手段を振動させることによって、該受取手段上の該粉粒体を該散布位置まで搬送可能になされている、粉粒体散布装置」を採用している。ここでいう「粉粒体」は、吸水性ポリマー４Ｐに言い換えることができる。斯かる粉粒体散布装置としては、例えば、特開２０１７−７０９４４号公報及び特開２０１９−４３７３５号公報に記載の粉粒体散布装置や特表２０１３−５１２０４７号公報に記載の粒子状材料を移送するための装置を用いることができる。 The spraying means 43 is arranged at a position separated by a predetermined distance from the spray target (base sheet 4S) of the water-absorbent polymer 4P. The water-absorbent polymer 4P sprayed from the spraying means 43 falls due to its own weight and adheres to one surface of the base sheet 4S (4S2) being transported under the spraying means 43. In the production method of the first embodiment, the water-absorbent polymer is sprayed on one of the sheets 4S1 and 4S2, but in the present invention, the water-absorbent polymer may be sprayed on both sheets. The spraying means 43 may be any as long as it can accurately spray a predetermined amount of particles of the water-absorbent polymer 4P at a predetermined position on the base sheet 4S during transportation, and its configuration is not particularly limited. In the production method of the first embodiment, as the spraying means 43, "a hopper capable of storing powder or granular material inside and having a discharge port of the powder or granular material, and a hopper located below the hopper and from the discharge port" A transport means for transporting and spraying the discharged powder or granular material to a spraying position is provided, and the transport means vibrates the receiving means for receiving the powder or granular material discharged from the discharge port and the receiving means. A powder / granular material spraying device having a vibration generating means and capable of transporting the powder / granular material on the receiving means to the spraying position by vibrating the receiving means by the vibration generating means. It is adopted. The "powder and granular material" here can be rephrased as a water-absorbent polymer 4P. Examples of such a powder or granular material spraying device include the powder or granular material spraying device described in JP-A-2017-709944 and JP-A-2019-43735 and the particulate material described in JP-A-2013-512047. A device for transfer can be used.

第２コア製造部４０では、図４に示すように、散布手段４３による吸水性ポリマー４Ｐの散布工程を経て得られた長尺の第２コア４を、ニップロール４４，４５間に導入して厚み方向に圧縮した後、該第２コア４の一方の面（第１コア３との対向面）に、塗布手段４６により接着剤４６Ａを塗布する。第１実施形態の製造方法では、接着剤４６Ａは、平面視で第２コア４の搬送方向（長手方向）ＭＤ４に延びるスパイラル状に塗布される。接着剤４６Ａが塗布された後の第２コア４の一方の面には、平面視スパイラル状の接着剤４６Ａの塗布部がＣＤに複数（図８及び図９に示す形態では５本）並べて配置される。なお、接着剤４６Ａの塗布パターンは図示のものに制限されず、任意に設定し得る。こうして一方の面に接着剤４６Ａが塗布された長尺の第２コア４は、第２搬送部５０へ搬送され、第１コア３に重ね合わされる。 In the second core manufacturing unit 40, as shown in FIG. 4, the long second core 4 obtained through the spraying step of the water-absorbent polymer 4P by the spraying means 43 is introduced between the nip rolls 44 and 45 to have a thickness. After compression in the direction, the adhesive 46A is applied to one surface of the second core 4 (the surface facing the first core 3) by the coating means 46. In the manufacturing method of the first embodiment, the adhesive 46A is applied in a spiral shape extending in the transport direction (longitudinal direction) MD4 of the second core 4 in a plan view. On one surface of the second core 4 after the adhesive 46A is applied, a plurality of application portions of the adhesive 46A in a plan view spiral shape are arranged side by side on the CD (five in the form shown in FIGS. 8 and 9). Will be done. The coating pattern of the adhesive 46A is not limited to the one shown in the figure, and can be set arbitrarily. In this way, the long second core 4 coated with the adhesive 46A on one surface is conveyed to the second conveying portion 50 and superposed on the first core 3.

ところで、第１実施形態の製造方法では、第２コア製造部４０で行われる吸水性ポリマー散布工程において、図７に示すように、基材シート４Ｓ２の一方の面に吸水性ポリマー４Ｐの非付着領域４Ｎが該シート４Ｓ２の搬送方向ＭＤ３に間欠配置されるように、吸水性ポリマー４Ｐを間欠的に散布する。斯かる吸水性ポリマー４Ｐの間欠散布により、基材シート４Ｓ２の一方の面には、吸水性ポリマー４Ｐの付着領域４Ｍと非付着領域４Ｎとが搬送方向ＭＤ３（基材シート４Ｓ２の長手方向）に交互に配置される。このように、基材シート４Ｓ（４Ｓ２）に吸水性ポリマー４Ｐを間欠的に散布する理由は、この散布工程後に実施される第２コア４（吸収体１）の切断をスムーズに行うためである。すなわち、長尺の第２コア４を得た後の工程としては、１）長尺の第２コア４をそのまま第２搬送部５０へ搬送し、後述する折り返し手段５６によるコアラップシート５の折り返し工程を経て長尺の吸収体１を得、該長尺の吸収体１を所定の製品単位長さに切断する工程、又は２）第２コア製造部４０において、長尺の第２コア４がニップロール４４，４５間を通過した後で且つ接着剤４６Ａを塗布した後に、該長尺の第２コア４を所定の製品単位長さに切断して枚葉の第２コア４を得、該枚葉の第２コア４を第２搬送部５０へ搬送する工程があり得るところ、一般に吸水性ポリマー４Ｐは非常に硬いため、前記１）又は２）における第２コア４（吸収体１）の切断位置に吸水性ポリマー４Ｐが存在すると、切断不良が起こり得る。そこで第１実施形態の製造方法では、第２コア４（吸収体１）の切断不良を未然に防止するために、長尺の第２コア４における切断予定位置には吸水性ポリマー４Ｐを散布しないようにしている。つまり、前記１）又は２）において長尺の第２コア４を切断する際には、吸水性ポリマー４Ｐの非付着領域４Ｎにて切断する。なお、第１実施形態の製造方法では、図４に示すように、長尺の第２コア４を切断せずにそのまま第２搬送部５０へ搬送しており、前記１）を採用している。 By the way, in the manufacturing method of the first embodiment, in the water-absorbent polymer spraying step performed in the second core manufacturing unit 40, as shown in FIG. 7, the water-absorbent polymer 4P is not adhered to one surface of the base sheet 4S2. The water-absorbent polymer 4P is intermittently sprayed so that the region 4N is intermittently arranged in the transport direction MD3 of the sheet 4S2. By intermittent spraying of the water-absorbent polymer 4P, the adhesive region 4M and the non-adhesive region 4N of the water-absorbent polymer 4P are transferred to the transport direction MD3 (longitudinal direction of the base sheet 4S2) on one surface of the base sheet 4S2. Arranged alternately. As described above, the reason why the water-absorbent polymer 4P is intermittently sprayed on the base sheet 4S (4S2) is to smoothly cut the second core 4 (absorbent 1) carried out after this spraying step. .. That is, as a step after obtaining the long second core 4, 1) the long second core 4 is directly conveyed to the second conveying portion 50, and the core wrap sheet 5 is folded back by the folding means 56 described later. A step of obtaining a long absorber 1 through a step and cutting the long absorber 1 to a predetermined product unit length, or 2) in the second core manufacturing unit 40, the long second core 4 is After passing between the nip rolls 44 and 45 and after applying the adhesive 46A, the long second core 4 is cut to a predetermined product unit length to obtain a single-wafered second core 4, and the sheet is obtained. Although there may be a step of transporting the second core 4 of the leaf to the second transport portion 50, since the water-absorbent polymer 4P is generally very hard, the second core 4 (absorber 1) in the above 1) or 2) is cut. The presence of the water-absorbent polymer 4P at the position can lead to poor cutting. Therefore, in the manufacturing method of the first embodiment, in order to prevent cutting defects of the second core 4 (absorbent 1), the water-absorbent polymer 4P is not sprayed at the planned cutting position in the long second core 4. I am trying to do it. That is, when cutting the long second core 4 in the above 1) or 2), it is cut in the non-adhesive region 4N of the water-absorbent polymer 4P. In the manufacturing method of the first embodiment, as shown in FIG. 4, the long second core 4 is directly transported to the second transport unit 50 without being cut, and the above 1) is adopted. ..

基材シート４Ｓに対して吸水性ポリマー４Ｐを間欠的に散布する方法は特に制限されず、例えば、Ａ）散布手段４３の動作を制御して、散布手段４３からの吸水性ポリマー４Ｐの散布自体を間欠的なものとする方法でもよく、あるいはＢ）散布手段４３からの吸水性ポリマー４Ｐの散布自体は連続的なものとする代わりに、散布手段４３から基材シート４Ｓに向かう吸水性ポリマー４Ｐの流れを適宜遮断する方法でもよい。第１実施形態の製造方法では前記Ｂ）の方法が採用されている。 The method of intermittently spraying the water-absorbent polymer 4P on the base sheet 4S is not particularly limited. For example, A) the operation of the spraying means 43 is controlled to spray the water-absorbent polymer 4P from the spraying means 43 itself. Or B) the spraying of the water-absorbent polymer 4P from the spraying means 43 is continuous, but the water-absorbing polymer 4P from the spraying means 43 toward the base sheet 4S is used. A method of appropriately blocking the flow of In the manufacturing method of the first embodiment, the method B) is adopted.

より具体的には、第１実施形態の第２コア製造部４０では、吸水性ポリマー散布工程において、基材シート４Ｓ（４Ｓ２）から所定距離離間した位置に配置された吸水性ポリマー４Ｐの散布手段４３から基材シート４Ｓ（４Ｓ２）に向けて吸水性ポリマー４Ｐを連続的に散布しつつ、散布手段４３から散布された吸水性ポリマー４Ｐの一部を基材シート４Ｓ（４Ｓ２）に付着する前に採取する操作を所定の時間間隔を置いて繰り返し実施することで、吸水性ポリマー４Ｐを間欠的に散布している。そして、斯かる操作によって採取された吸水性ポリマー４Ｐを、第１コア３の製造工程及び／又は第２コア４の製造工程に供給している。第２コア製造部４０は、図４に示すように、散布手段４３とその下方を搬送される基材シート４Ｓ（４Ｓ２）との間に、吸水性ポリマー４Ｐの回収手段４７を備えており、該回収手段４７は、散布手段４３から散布された吸水性ポリマー４Ｐを所定のタイミングで採取するとともに、その採取した吸水性ポリマー４Ｐを、該回収手段４７と第１コア製造部２０及び散布手段４３とを結ぶ吸水性ポリマー供給路４８を介して、第１コア製造部２０及び／又は散布手段４３に供給する。第１実施形態の製造方法ではこのように、吸水性ポリマー４Ｐの間欠散布を実施することで、第２コア４（吸収体１）の切断不良の問題を未然に防止するとともに、その間欠塗布の実施に起因して生じる余剰の吸水性ポリマー４Ｐを再利用している。吸水性ポリマー４Ｐの回収手段４７、及び吸水性ポリマー供給路４８を含む、回収した吸水性ポリマー４Ｐの再利用システムは、この種の粉粒体の間欠散布に関する公知の技術を適宜用いて構成することができる。 More specifically, in the second core manufacturing unit 40 of the first embodiment, in the water-absorbent polymer spraying step, the water-absorbent polymer 4P spraying means arranged at a position separated from the base sheet 4S (4S2) by a predetermined distance. While continuously spraying the water-absorbent polymer 4P from 43 toward the base sheet 4S (4S2), before a part of the water-absorbent polymer 4P sprayed from the spraying means 43 adheres to the base sheet 4S (4S2). The water-absorbent polymer 4P is intermittently sprayed by repeating the operation of collecting the water-absorbing polymer at predetermined time intervals. Then, the water-absorbent polymer 4P collected by such an operation is supplied to the manufacturing process of the first core 3 and / or the manufacturing process of the second core 4. As shown in FIG. 4, the second core manufacturing unit 40 includes a means for recovering the water-absorbent polymer 4P 47 between the spraying means 43 and the base sheet 4S (4S2) conveyed below the spraying means 43. The recovery means 47 collects the water-absorbent polymer 4P sprayed from the spraying means 43 at a predetermined timing, and collects the collected water-absorbent polymer 4P from the recovery means 47, the first core manufacturing unit 20, and the spraying means 43. It is supplied to the first core manufacturing unit 20 and / or the spraying means 43 via the water-absorbent polymer supply path 48 connecting the two. In the production method of the first embodiment, by intermittently spraying the water-absorbent polymer 4P in this way, the problem of poor cutting of the second core 4 (absorbent 1) can be prevented, and the intermittent coating thereof can be prevented. The surplus water-absorbing polymer 4P generated due to the practice is reused. The reuse system of the recovered water-absorbent polymer 4P, which includes the recovery means 47 of the water-absorbent polymer 4P and the water-absorbent polymer supply path 48, is constructed by appropriately using a known technique for intermittent spraying of this kind of powder or granular material. be able to.

第２搬送部５０は、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段５１を備えている。第２搬送部５０の搬送手段５１は、所定の周回軌道を図４中の矢印Ｒ３方向に移動する通気性のコンベアベルト５２と、該周回軌道内に設置された吸引手段としてのサクションボックス５３，５４とを含んで構成されている。コンベアベルト５２は被搬送物の搬送面を形成し、コンベアベルト５２の上面に被搬送物（コアラップシート５、第１コア３及び第２コア４の積層物）が載置される。コンベアベルト５２は例えば、多数の吸引孔（図示せず）を有するメッシュベルトからなる。サクションボックス５３，５４を作動させると、コンベアベルト５２（搬送面）上の被搬送物が吸引孔（図示せず）を介して吸引されるようになされている。 The second transport unit 50 includes a transport means 51 capable of sucking and transporting the object to be transported on the transport surface. The transport means 51 of the second transport unit 50 includes a breathable conveyor belt 52 that moves a predetermined orbit in the direction of arrow R3 in FIG. 4, and a suction box 53 as suction means installed in the orbit. It is configured to include 54 and. The conveyor belt 52 forms a transport surface for the object to be transported, and the object to be transported (a laminate of the core wrap sheet 5, the first core 3 and the second core 4) is placed on the upper surface of the conveyor belt 52. The conveyor belt 52 is composed of, for example, a mesh belt having a large number of suction holes (not shown). When the suction boxes 53 and 54 are operated, the object to be transported on the conveyor belt 52 (conveyor surface) is sucked through the suction holes (not shown).

また第２搬送部５０は、図４に示すように、第２コア製造部４０で製造された第２コア４が第１コア３上に供給された後に、その両コア３，４の積層物を第２コア４側（上面側）から押圧する押圧ロール５５を備えている。押圧ロール５５は、コアラップシート５の搬送路における第２コア４の合流地点又はその近傍において、搬送中のコアラップシート５（第１コア３）を挟んでサクションボックス５３とは反対側に配置されている。 Further, as shown in FIG. 4, the second transport unit 50 is a laminate of both cores 3 and 4 after the second core 4 manufactured by the second core manufacturing unit 40 is supplied onto the first core 3. Is provided with a pressing roll 55 that presses from the second core 4 side (upper surface side). The pressing roll 55 is arranged on the side opposite to the suction box 53 with the core wrap sheet 5 (first core 3) being transported sandwiched at the confluence of the second core 4 or its vicinity in the transport path of the core wrap sheet 5. Has been done.

また第２搬送部５０は、図４に示すように、押圧ロール５５よりもＭＤの下流側に、コアラップシート５の折り返し手段５６を備えている。折り返し手段５６は、コンベアベルト５２の周回軌道の一部に設置され、サクションボックス５４の設置箇所に対応して配置されている。折り返し手段５６は、搬送中のコアラップシート５の両側部５Ｂ，５Ｂ、すなわちコアラップシート５上に載置された吸収性コア２（第１コア３と第２コア４との積層物）のＭＤに沿う両側縁からの延出部を、該吸収性コア２側に折り返すための公知の折り返し機構を備えている。 Further, as shown in FIG. 4, the second transport unit 50 is provided with a folding means 56 for the core wrap sheet 5 on the downstream side of the MD with respect to the pressing roll 55. The folding means 56 is installed in a part of the orbit around the conveyor belt 52, and is arranged corresponding to the installation location of the suction box 54. The folding means 56 is a stack of absorbent cores 2 (a laminate of the first core 3 and the second core 4) placed on both side portions 5B and 5B of the core wrap sheet 5 being conveyed, that is, the core wrap sheet 5. It is provided with a known folding mechanism for folding the extending portions from both side edges along the MD toward the absorbent core 2 side.

前述の如き構成の製造装置１０を用いた吸収体１の製造方法では、先ず、一方向に搬送されるコアラップシート５上に第１コア３を配置する（第１コア配置工程）。より具体的には、図４に示すように、第１コア製造部２０で製造された複数の第１コア３を、第１搬送部３０によって一方向（符号ＭＤ１で示す方向）に搬送中の長尺のコアラップシート５の上面に、ＭＤ１に間欠的に配置する。このコアラップシート５の上面の略全域には、塗布手段３４，３５によって接着剤３４Ａ，３５Ａが図５に示す如くに予め塗布されており、第１コア製造部２０の積繊ドラム２１の前記集積用凹部から離型された第１コア３は、コアラップシート５の上面のＣＤの中央部５Ａに配置され、該中央部５Ａに塗布された接着剤３５Ａと接触する。 In the method for manufacturing the absorber 1 using the manufacturing apparatus 10 having the above-described configuration, first, the first core 3 is arranged on the core wrap sheet 5 which is conveyed in one direction (first core arrangement step). More specifically, as shown in FIG. 4, a plurality of first cores 3 manufactured by the first core manufacturing unit 20 are being transported in one direction (direction indicated by reference numeral MD1) by the first transport unit 30. The MD1 is intermittently arranged on the upper surface of the long core wrap sheet 5. Adhesives 34A and 35A are pre-coated by the coating means 34 and 35 on substantially the entire upper surface of the core wrap sheet 5 as shown in FIG. 5, and the fiber stacking drum 21 of the first core manufacturing unit 20 is said to have been coated in advance. The first core 3 separated from the accumulation recess is arranged in the central portion 5A of the CD on the upper surface of the core wrap sheet 5, and comes into contact with the adhesive 35A applied to the central portion 5A.

前記第１コア配置工程では、コアラップシート５上に配置された第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側のうちの少なくとも一方の両側に、「コアラップシート５の第１コア３との非重複部」（以下、単に、「コアラップシート５の非重複部」ともいう。）、すなわち、「コアラップシート５における平面視（厚み方向の投影視）で第１コア３と重ならない部分」が存在するように、第１コア３を配置する。第１実施形態では図５に示すように、コアラップシート５の非重複部（第１コア３で被覆されずに露出している部分）が１個の第１コア３を包囲するように配置されており、したがって、第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側の双方に該非重複部が存在するように、第１コア３がコアラップシート５上に配置されている。そして、第１コア３を包囲するコアラップシート５の非重複部における第１コア３の配置面には接着剤３５Ａ，３５Ｂが塗布されている。こうして第１コア３が配置されたコアラップシート５は、第２搬送部５０へ搬送される。 In the first core arranging step, "core wraps" are placed on both sides of the MD1 sandwiching the first core 3 arranged on the core wrap sheet 5 and on at least one of both sides of the CD sandwiching the first core 3. "Non-overlapping portion of the sheet 5 with the first core 3" (hereinafter, also simply referred to as "non-overlapping portion of the core wrap sheet 5"), that is, "plan view (projective view in the thickness direction) of the core wrap sheet 5) The first core 3 is arranged so that there is a portion that does not overlap with the first core 3. In the first embodiment, as shown in FIG. 5, the non-overlapping portion (the portion exposed without being covered by the first core 3) of the core wrap sheet 5 is arranged so as to surround one first core 3. Therefore, the first core 3 is placed on the core wrap sheet 5 so that the non-overlapping portions are present on both sides of the MD1 sandwiching the first core 3 and both sides of the CD sandwiching the first core 3. Have been placed. Adhesives 35A and 35B are applied to the arrangement surface of the first core 3 in the non-overlapping portion of the core wrap sheet 5 surrounding the first core 3. The core wrap sheet 5 on which the first core 3 is arranged is conveyed to the second conveying unit 50 in this way.

製造装置１０を用いた吸収体１の製造方法では、前記第１コア配置工程後で且つコアラップシート５上に配置された第１コア３上に第２コア４を配置する前（第２コア配置工程の実施前）に、第１コア３をコアラップシート５側に押圧する。より具体的には、図４に示すように、コアラップシート５上に配置された第１コア３を、第１搬送部３０が備える押圧ロール３６によってコアラップシート５側に押圧することで、該第１コア３を厚み方向に圧縮する。なお本発明では、この第２コア配置工程前の第１コア３の圧縮工程は必須ではない。 In the method for manufacturing the absorber 1 using the manufacturing apparatus 10, after the first core placement step and before the second core 4 is placed on the first core 3 placed on the core wrap sheet 5 (second core). Before the placement step is performed), the first core 3 is pressed toward the core wrap sheet 5. More specifically, as shown in FIG. 4, the first core 3 arranged on the core wrap sheet 5 is pressed toward the core wrap sheet 5 by the pressing roll 36 provided in the first transport unit 30. The first core 3 is compressed in the thickness direction. In the present invention, the compression step of the first core 3 before the second core placement step is not essential.

次いで、第１コア３が配置され一方向に搬送されるコアラップシート５に、該第１コア３側から第２コア４を供給し、該第１コア３を覆うように該コアラップシート５上に配置する（第２コア配置工程）。より具体的には、図４に示すように、第２搬送部５０によって一方向（符号ＭＤ１で示す方向）に搬送中の長尺のコアラップシート５の上面に、第２コア製造部４０で製造された長尺の第２コア４を供給し、該上面に配置されている第１コア３に重ね合わせて、コアラップシート５と第１コア３と第２コア４との積層物を得る。図８には、図４の符号Ｐ１で示す位置、すなわち第１コア３と第２コア４との合流位置での前記積層物の状態（第１コア３上に第２コア４を重ね合わせた直後の状態）が示されている。前述したように、第２コア４における第１コア３との対向面には、塗布手段４６によって接着剤４６Ａが予め塗布されており、第１コア３と第２コア４とは接着剤４６Ａを介して接合される。第１コア３に重ね合わされる第２コア４のＣＤの長さ（幅）は、該第１コア３が配置されているコアラップシート５のＣＤの中央部５Ａの幅と略同じである。 Next, the second core 4 is supplied from the first core 3 side to the core wrap sheet 5 in which the first core 3 is arranged and conveyed in one direction, and the core wrap sheet 5 covers the first core 3. Place on top (second core placement step). More specifically, as shown in FIG. 4, the second core manufacturing unit 40 is placed on the upper surface of the long core wrap sheet 5 being transported in one direction (direction indicated by reference numeral MD1) by the second transport unit 50. The manufactured long second core 4 is supplied and superposed on the first core 3 arranged on the upper surface thereof to obtain a laminate of the core wrap sheet 5, the first core 3 and the second core 4. .. In FIG. 8, the state of the laminate at the position indicated by the reference numeral P1 in FIG. 4, that is, the confluence position of the first core 3 and the second core 4 (the second core 4 is superposed on the first core 3). Immediately after) is shown. As described above, the adhesive 46A is pre-coated on the surface of the second core 4 facing the first core 3 by the coating means 46, and the adhesive 46A is applied to the first core 3 and the second core 4. Joined through. The length (width) of the CD of the second core 4 superimposed on the first core 3 is substantially the same as the width of the central portion 5A of the CD of the core wrap sheet 5 on which the first core 3 is arranged.

前記第２コア配置工程では、コアラップシート５上に配置された第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側のうちの少なくとも一方の両側に、「第２コア４の第１コア３との非重複部」（以下、単に、「第２コア４の非重複部」ともいう。）、すなわち「第２コア４における平面視（厚み方向の投影視）で第１コア３と重ならない部分」が存在するように、第２コア４を配置する。第１実施形態の製造方法では、第１コア３を挟んでＭＤ１の両側と第１コア３を挟んでＣＤの両側との双方に、第２コア４の非重複部が存在するように、第２コア４が配置される。図８では、第１コア３を挟んでＣＤの両側に、第２コア４の非重複部（第２コア４における第１コア３のＭＤ１に沿う両側縁からの延出部）が存在する様子が示されている。この第２コア４の非重複部における第１コア３との対向面には接着剤４６Ａが塗布されている。 In the second core arranging step, "second core 3 is sandwiched between the first core 3 arranged on the core wrap sheet 5 and both sides of the MD1 and at least one of both sides of the CD sandwiching the first core 3 are "second". In the "non-overlapping portion of the core 4 with the first core 3" (hereinafter, also simply referred to as "non-overlapping portion of the second core 4"), that is, in the plan view (projective view in the thickness direction) of the second core 4. The second core 4 is arranged so that there is a portion that does not overlap with the first core 3. In the manufacturing method of the first embodiment, the non-overlapping portions of the second core 4 are present on both sides of the MD1 sandwiching the first core 3 and both sides of the CD sandwiching the first core 3. 2 cores 4 are arranged. In FIG. 8, non-overlapping portions of the second core 4 (extending portions from both side edges of the first core 3 along the MD1 in the second core 4) are present on both sides of the CD with the first core 3 in between. It is shown. Adhesive 46A is applied to the surface of the second core 4 facing the first core 3 in the non-overlapping portion.

なお、図８及び後述する図９では、理解容易の観点から、前記積層物において実際には互いに近接ないし接触（接合）している層（シート）どうしを敢えて離間させた状態で示している。例えば、第１コア３と第２コア４との合流位置では、第１コア３を挟んで相対向する第２コア４（基材シート４Ｓ１）とコアラップシート５のＣＤの中央部５Ａとは、実際には通常、両者の第１コア３との非重複部において互いに近接ないし接触（接合）しているが、図８では、両者を離間させた状態で記載している。また、図８及び図９では、べた塗りされた接着剤（接着剤４２Ａ）と、べた塗りされずに搬送方向に延在するように塗布された接着剤（接着剤３４Ａ，３５Ａ，４１Ａ，４６Ａ）との区別を容易にするために後者の接着剤どうしのＣＤの間隔を意図的に長くとっているが、実際の接着剤どうしの間隔とは無関係である。 In addition, in FIG. 8 and FIG. 9 described later, from the viewpoint of easy understanding, the layers (sheets) that are actually close to each other or are in contact (bonded) with each other in the laminate are shown in a state of being intentionally separated from each other. For example, at the confluence position of the first core 3 and the second core 4, the second core 4 (base sheet 4S1) facing each other across the first core 3 and the central portion 5A of the CD of the core wrap sheet 5 are Actually, they are usually close to each other or in contact (join) with each other at the non-overlapping portion with the first core 3, but in FIG. 8, they are described in a state of being separated from each other. Further, in FIGS. 8 and 9, a solid-coated adhesive (adhesive 42A) and an adhesive (adhesives 34A, 35A, 41A, 46A) applied so as to extend in the transport direction without being solid-coated. ), The distance between the CDs of the latter adhesives is intentionally long, but it is irrelevant to the actual distance between the adhesives.

そして、前記第２コア配置工程では、第２コア４で第１コア３をコアラップシート５側に押圧することで第１コア３を厚み方向に圧縮しつつ、第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側のうちの少なくとも一方の両側にて、コアラップシート５及び第２コア４それぞれの非重複部どうしを接合して、図１に示す如き接合部６の対を形成する。第１実施形態の製造方法では、第１コア３を挟んでＭＤ１の両側にてコアラップシート５及び第２コア４それぞれの非重複部どうしを接合して、第１コア３を挟んで縦方向Ｘに相対向する一組の横接合部６Ｙ，６Ｙの対（図１参照）を形成するとともに、第１コア３を挟んでＣＤの両側にて、コアラップシート５及び第２コア４それぞれの前記非重複部どうしを接合して、第１コア３を挟んで横方向Ｙに相対向する一組の縦接合部６Ｘ，６Ｘの対（図１参照）を形成する。 Then, in the second core arranging step, the first core 3 is pressed toward the core wrap sheet 5 by the second core 4, so that the first core 3 is compressed in the thickness direction while the first core 3 is sandwiched between the MD1s. The non-overlapping portions of the core wrap sheet 5 and the second core 4 are joined to each other on both sides of the CD and at least one of the two sides of the CD with the first core 3 in between. Form 6 pairs. In the manufacturing method of the first embodiment, the core wrap sheets 5 and the non-overlapping portions of the second core 4 are joined to each other on both sides of the MD1 with the first core 3 sandwiched therein, and the first core 3 is sandwiched in the vertical direction. A pair of lateral joints 6Y and 6Y facing each other (see FIG. 1) is formed, and the core wrap sheet 5 and the second core 4 are formed on both sides of the CD with the first core 3 sandwiched between them. The non-overlapping portions are joined to form a pair of vertically joined portions 6X and 6X (see FIG. 1) facing each other in the lateral direction Y with the first core 3 interposed therebetween.

前記第２コア配置工程で実施される、前述の「第２コア４による第１コア３の圧縮」は、典型的には、第２コア４に搬送時の張力がかかっている状態で該第２コア４にて第１コア３を押圧する方法によって実施できる。第１実施形態の製造方法では、この典型的な方法に加えて更に、図４に示すように押圧ロール５５を用い、第１コア３上に第２コア４を重ねつつ、該第２コア４を押圧ロール５５で該第１コア３側に押圧する方法を採用している。押圧ロール５５のＣＤの長さ（回転軸方向の長さ）は、第１コア３と第２コア４との積層物の同方向の長さよりも長く、押圧ロール５５による押圧によって、第１コア３を含めた該積層物の全体を厚み方向に圧縮することができる。 The above-mentioned "compression of the first core 3 by the second core 4" performed in the second core arrangement step is typically performed in a state where the second core 4 is under tension during transportation. This can be carried out by a method of pressing the first core 3 with the two cores 4. In the manufacturing method of the first embodiment, in addition to this typical method, a pressing roll 55 is used as shown in FIG. 4, and the second core 4 is superposed on the first core 3 while the second core 4 is superposed. Is pressed toward the first core 3 side by the pressing roll 55. The length of the CD of the pressing roll 55 (the length in the rotation axis direction) is longer than the length of the laminate of the first core 3 and the second core 4 in the same direction, and the first core is pressed by the pressing roll 55. The entire laminate including 3 can be compressed in the thickness direction.

第１実施形態の製造方法では、前記第２コア配置工程が実施される第２搬送部５０が、前述したように、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段５１を備えており、コアラップシート５は、該搬送面を形成するコンベアベルト３２上に配置されて搬送されるところ、前記第２コア配置工程では、図８に示すように、搬送手段５１（サクションボックス５３）による吸引力Ｖにより、コアラップシート５をコンベアベルト３２上に吸着させるとともに、第２コア４の第１コア３との非重複部を、コンベアベルト３２上に吸着されたコアラップシート５に吸着させ、コアラップシート５及びこれに吸着する第２コア４の少なくとも一方に予め付与された接着剤によって両者を接合して、接合部６（６Ｘ，６Ｙ）の対を形成する。第１実施形態の製造方法では、この接合部６の対を形成する接着剤は、コアラップシート５のＣＤの中央部５Ａに塗布された接着剤３５Ａ、及び第２コア４に塗布された接着剤４６Ａである。また、第１実施形態の製造方法では前述したように、押圧ロール５５を用いて第２コア４を第１コア３側に押圧しているところ、この押圧ロール５５による押圧によってコアラップシート５と第２コア４との近接ないし接触が促進され得るため、押圧ロール５５による押圧も接合部６の形成に寄与し得る。 In the manufacturing method of the first embodiment, the second transport unit 50 on which the second core arrangement step is carried out includes, as described above, the transport means 51 capable of sucking and transporting the object to be transported on the transport surface. The core wrap sheet 5 is arranged and conveyed on the conveyor belt 32 forming the conveying surface. In the second core arranging step, as shown in FIG. 8, the conveying means 51 (suction box 53) is conveyed. ), The core wrap sheet 5 is attracted to the conveyor belt 32, and the non-overlapping portion of the second core 4 with the first core 3 is attached to the core wrap sheet 5 attracted to the conveyor belt 32. A pair of joint portions 6 (6X, 6Y) is formed by adsorbing and joining the core wrap sheet 5 and at least one of the second core 4 adsorbed to the core wrap sheet 5 with an adhesive previously applied to the core wrap sheet 5. In the manufacturing method of the first embodiment, the adhesive forming the pair of the joint portions 6 is the adhesive 35A applied to the central portion 5A of the CD of the core wrap sheet 5 and the adhesive applied to the second core 4. Agent 46A. Further, in the manufacturing method of the first embodiment, as described above, the second core 4 is pressed toward the first core 3 by using the pressing roll 55, and the core wrap sheet 5 is pressed by the pressing by the pressing roll 55. Since the proximity or contact with the second core 4 can be promoted, the pressing by the pressing roll 55 can also contribute to the formation of the joint portion 6.

また第１実施形態の製造方法では、前述したとおり図２に示す如くに、第１コア３の形成材料非存在部３Ｎにおいてコアラップシート５と第２コア４（基材シート４Ｓ１）とが接合されているところ、斯かる接合も、前述の接合部６の形成と同様に、搬送手段５１による吸引と、コアラップシート５のＣＤの中央部５Ａに塗布された接着剤３５Ａ及び第２コア４に塗布された接着剤４６Ａとによってなされる。また、押圧ロール５５による押圧も斯かる接合に寄与し得る。特に例えば、押圧ロール５５の周面（被押圧物との接触面）における形成材料非存在部３Ｎに対応する位置に凸部（図示せず）が配置されている場合、押圧ロール５５で第２コア４を押圧したときに、第２コア４における形成材料非存在部３Ｎに対応する部分（平面視において形成材料非存在部３Ｎと重複する部分）が該凸部によって押圧されて形成材料非存在部３Ｎに入り込むため、その形成材料非存在部３Ｎに入り込んだ第２コア４とコアラップシート５とが接着剤３５Ａ，４６Ａを介して接合されやすくなる。 Further, in the manufacturing method of the first embodiment, as shown in FIG. 2, as described above, the core wrap sheet 5 and the second core 4 (base material sheet 4S1) are bonded at the portion 3N where the forming material of the first core 3 does not exist. As a result, such joining is also performed by suction by the transport means 51 and the adhesive 35A and the second core 4 applied to the central portion 5A of the CD of the core wrap sheet 5, similarly to the formation of the joint portion 6 described above. It is made by the adhesive 46A applied to. Further, pressing by the pressing roll 55 can also contribute to such joining. In particular, for example, when a convex portion (not shown) is arranged at a position corresponding to the forming material non-existing portion 3N on the peripheral surface (contact surface with the object to be pressed) of the pressing roll 55, the pressing roll 55 is used for the second. When the core 4 is pressed, the portion of the second core 4 corresponding to the forming material non-existing portion 3N (the portion overlapping the forming material non-existing portion 3N in a plan view) is pressed by the convex portion and the forming material does not exist. Since it enters the portion 3N, the second core 4 and the core wrap sheet 5 that have entered the portion 3N in which the forming material does not exist are easily joined via the adhesives 35A and 46A.

第１実施形態の製造方法ではこのように、コアラップシート５及び第２コア４それぞれの第１コア３との非重複部どうしを、これらの積層物の配置面（コンベアベルト３２）側から吸引することで確実に重ね合わせ、両非重複部の少なくとも一方に予め付与された接着剤（接着剤３５Ａ，４６Ａ）を介して接合することで、接合部６（６Ｘ，６Ｙ）の対を形成し、更には、形成材料非存在部３Ｎでのコアラップシート５と第２コア４との接合を実現している。 In the manufacturing method of the first embodiment, the non-overlapping portions of the core wrap sheet 5 and the second core 4 with the first core 3 are sucked from the arrangement surface (conveyor belt 32) side of these laminates in this way. By doing so, they are surely overlapped and joined via an adhesive (adhesives 35A, 46A) previously applied to at least one of both non-overlapping portions to form a pair of joining portions 6 (6X, 6Y). Furthermore, the core wrap sheet 5 and the second core 4 are joined at the forming material non-existing portion 3N.

第２搬送部５０では、こうして長尺のコアラップシート５のＣＤの中央部５Ａに配置された第１コア３上に長尺の第２コア４を配置した後、折り返し手段５６によってコアラップシート５のＣＤの両側部５Ｂ，５Ｂを、該第２コア４に巻きかける（巻き上げる）ように、中央部５Ａ側（第２コア４側）に折り返し、長尺の吸収体１を得る。図９には、この長尺の吸収体１のＣＤに沿う断面が示されている。なお前述したとおり、図９は、理解容易性を重視して作成されており、必ずしも実際の状態を示しているわけではない。以上のようにして得られた長尺の吸収体１は、その後、図示しない切断手段により所定の製品単位長さに切断され、図１に示す如き吸収体１が製造される。前述したように、長尺の吸収体１における切断予定位置には、第２コア４を構成する吸水性ポリマー４Ｐの間欠散布により、吸水性ポリマー４Ｐの非付着領域４Ｎが存在しており、該非付着領域４Ｎにて長尺の吸収体１を切断するので、切断不良が生じ難く、製品単位長さに切断する作業をスムーズに行うことができる。 In the second transport unit 50, after arranging the long second core 4 on the first core 3 arranged in the central portion 5A of the CD of the long core wrap sheet 5, the core wrap sheet is placed by the folding means 56. Both side portions 5B and 5B of the CD of 5 are folded back toward the central portion 5A side (second core 4 side) so as to be wound (rolled up) around the second core 4, and a long absorber 1 is obtained. FIG. 9 shows a cross section of the long absorber 1 along the CD. As described above, FIG. 9 is created with an emphasis on ease of understanding, and does not necessarily show the actual state. The long absorber 1 obtained as described above is then cut to a predetermined product unit length by a cutting means (not shown) to produce the absorber 1 as shown in FIG. As described above, the non-adhesive region 4N of the water-absorbent polymer 4P is present at the planned cutting position in the long absorber 1 by intermittent spraying of the water-absorbent polymer 4P constituting the second core 4. Since the long absorber 1 is cut at the adhesion region 4N, cutting defects are unlikely to occur, and the work of cutting to the product unit length can be smoothly performed.

第１実施形態の製造方法では、前述したとおり図４に示すように、搬送中のコアラップシート５上に第１コア３及び第２コア４をこの順で配置することで吸収体１を製造していたが、本発明の吸収体の製造方法では、コアラップシート５と第２コア４とを入れ替えることもできる。すなわち、搬送中の第２コア４上に第１コア３及びコアラップシート５をこの順で配置することで吸収体１を製造することもできる（第２実施形態の製造方法）。
以下、本発明の吸収体の製造方法の他の実施形態について、図１０及び図１１を参照して説明する。後述する他の実施形態については、第１実施形態と異なる構成を主として説明し、第１実施形態と同様の構成は同一の符号を付して説明を省略する。後述する他の実施形態の特に説明しない構成については、第１実施形態の説明が適宜適用される。 In the manufacturing method of the first embodiment, as shown in FIG. 4, as described above, the absorber 1 is manufactured by arranging the first core 3 and the second core 4 in this order on the core wrap sheet 5 being transported. However, in the method for producing an absorber of the present invention, the core wrap sheet 5 and the second core 4 can be replaced with each other. That is, the absorber 1 can also be manufactured by arranging the first core 3 and the core wrap sheet 5 on the second core 4 being transported in this order (the manufacturing method of the second embodiment).
Hereinafter, other embodiments of the method for producing an absorber of the present invention will be described with reference to FIGS. 10 and 11. Regarding other embodiments described later, configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The description of the first embodiment is appropriately applied to the configurations of other embodiments described later which are not particularly described.

第２実施形態の製造方法では、先ず、一方向に搬送される長尺の第２コア４上に第１コア３を配置する（第１コア配置工程）。この長尺の第２コア４は、前述した、第１実施形態において第２コア製造部４０で実施される第２コア４の製造工程と同様の製造工程を経て製造することができる。例えば図４を参照して、コアラップシート５に代えて、第２コア製造部４０で製造された長尺の第２コア４を、一方向（符号ＭＤ１で示す方向）に搬送し、その搬送中の長尺の第２コア４の上面に、第１コア製造部２０で製造された複数の第１コア３を、第１搬送部３０によってＭＤ１に間欠的に配置する。 In the manufacturing method of the second embodiment, first, the first core 3 is arranged on the long second core 4 conveyed in one direction (first core arrangement step). The long second core 4 can be manufactured through the same manufacturing process as the manufacturing process of the second core 4 carried out by the second core manufacturing unit 40 in the first embodiment described above. For example, referring to FIG. 4, instead of the core wrap sheet 5, the long second core 4 manufactured by the second core manufacturing unit 40 is transported in one direction (the direction indicated by the reference numeral MD1), and the transport thereof is performed. On the upper surface of the long second core 4 inside, a plurality of first cores 3 manufactured by the first core manufacturing unit 20 are intermittently arranged in the MD1 by the first transport unit 30.

第２実施形態の製造方法において、前記第１コア配置工程では、第２コア４上に配置された第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側のうちの少なくとも一方の両側に、「第２コア４の第１コア３との非重複部」、すなわち、「第２コア４における平面視（厚み方向の投影視）で第１コア３と重ならない部分」が存在するように、第１コア３を配置する。 In the manufacturing method of the second embodiment, in the first core arranging step, the first core 3 arranged on the second core 4 is sandwiched between both sides of the MD1 and the first core 3 is sandwiched between both sides of the CD. On at least one of the two sides, "a non-overlapping portion of the second core 4 with the first core 3", that is, "a portion of the second core 4 that does not overlap with the first core 3 in a plan view (projection view in the thickness direction)". The first core 3 is arranged so that is present.

第１実施形態の製造方法では、図４に示すように、第１コア配置工程後で且つ第２コア配置工程の実施前に、コアラップシート５上に配置された第１コア３を、第１搬送部３０が備える押圧ロール３６によってコアラップシート５側に押圧したが、第２実施形態の製造方法でも斯かる押圧工程を採用することができる。すなわち、第２コア４上に配置された第１コア３を、押圧ロール３６によって第２コア４側に押圧することで、該第１コア３を厚み方向に圧縮することができる。 In the manufacturing method of the first embodiment, as shown in FIG. 4, the first core 3 arranged on the core wrap sheet 5 is placed after the first core arrangement step and before the second core arrangement step is performed. Although the core wrap sheet 5 is pressed by the pressing roll 36 provided in the transport unit 30, such a pressing step can also be adopted in the manufacturing method of the second embodiment. That is, by pressing the first core 3 arranged on the second core 4 toward the second core 4 side by the pressing roll 36, the first core 3 can be compressed in the thickness direction.

第２実施形態の製造方法においては、次いで、第１コア３が配置され一方向に搬送される第２コア４に、該第１コア３側からコアラップシート５を供給し、該第１コア３を覆うように該コアラップシート５上に配置する（コアラップシート配置工程）。例えば図４を参照して、一方向（符号ＭＤ１で示す方向）に搬送中の長尺の第２コア４の上面に、原反５Ｒから連続的に巻き出した長尺のコアラップシート５を供給し、該上面に配置されている第１コア３に重ね合わせて、第２コア４と第１コア３とコアラップシート５との積層物を得る。図１０には、図４の符号Ｐ１で示す位置での前記積層物の状態、すなわち第１コア３上にコアラップシート５を重ね合わせた直後の状態の一例が示されている。 In the manufacturing method of the second embodiment, the core wrap sheet 5 is then supplied from the first core 3 side to the second core 4 in which the first core 3 is arranged and conveyed in one direction, and the first core is supplied. It is arranged on the core wrap sheet 5 so as to cover 3 (core wrap sheet arrangement step). For example, referring to FIG. 4, a long core wrap sheet 5 continuously unwound from the original fabric 5R is placed on the upper surface of the long second core 4 being conveyed in one direction (direction indicated by reference numeral MD1). It is supplied and superposed on the first core 3 arranged on the upper surface to obtain a laminate of the second core 4, the first core 3, and the core wrap sheet 5. FIG. 10 shows an example of the state of the laminate at the position indicated by the reference numeral P1 of FIG. 4, that is, the state immediately after the core wrap sheet 5 is superposed on the first core 3.

第２実施形態の製造方法における前記コアラップシート配置工程では、第２コア４上に配置された第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側のうちの少なくとも一方の両側に、「コアラップシート５の第１コア３との非重複部」、すなわち「コアラップシート５における平面視（厚み方向の投影視）で第１コア３と重ならない部分」が存在するように、コアラップシート５を配置する。 In the core wrap sheet arranging step in the manufacturing method of the second embodiment, at least one of both sides of the MD1 sandwiching the first core 3 arranged on the second core 4 and both sides of the CD sandwiching the first core 3 On both sides of one side, there are "non-overlapping parts of the core wrap sheet 5 with the first core 3", that is, "a part of the core wrap sheet 5 that does not overlap with the first core 3 in a plan view (projection view in the thickness direction)". The core wrap sheet 5 is arranged so as to do so.

第２実施形態の製造方法において、前記コアラップシート配置工程では、コアラップシート５で第１コア３を第２コア４側に押圧することで第１コア３を厚み方向に圧縮しつつ、第１コア３を挟んでＭＤ１の両側及び第１コア３を挟んでＣＤの両側のうちの少なくとも一方の両側にて、第２コア４及びコアラップシート５それぞれの非重複部どうしを接合して、図１に示す如き接合部６の対を形成する。 In the manufacturing method of the second embodiment, in the core wrap sheet arranging step, the first core 3 is pressed toward the second core 4 side by the core wrap sheet 5, so that the first core 3 is compressed in the thickness direction, and the first core 3 is compressed. The non-overlapping portions of the second core 4 and the core wrap sheet 5 are joined to each other on both sides of the MD1 sandwiching the 1 core 3 and at least one of the both sides of the CD sandwiching the first core 3. A pair of joints 6 is formed as shown in FIG.

第１実施形態の製造方法における前記第２コア配置工程では、図８に示すように、搬送手段５１（サクションボックス５３）による吸引力Ｖを利用して、コアラップシート５と第２コア４との接合部６（６Ｘ，６Ｙ）の対を形成していたが、第２実施形態の製造方法における前記コアラップシート配置工程でも、斯かる搬送手段の吸引力を利用して接合部の対を形成することができる。すなわち前記コアラップシート配置工程では、図１０に示すように、搬送手段５１（サクションボックス５３）による吸引力Ｖにより、第２コア４をコンベアベルト３２上に吸着させるとともに、コアラップシート５の第１コア３との非重複部を、コンベアベルト３２上に吸着された第２コア４に吸着させ、第２コア４及びこれに吸着するコアラップシート５の少なくとも一方に予め付与された接着剤によって両者を接合して、接合部６（６Ｘ，６Ｙ）の対を形成することができる。 In the second core arranging step in the manufacturing method of the first embodiment, as shown in FIG. 8, the core wrap sheet 5 and the second core 4 are formed by utilizing the suction force V generated by the conveying means 51 (suction box 53). The pair of the joints 6 (6X, 6Y) was formed, but also in the core wrap sheet arranging step in the manufacturing method of the second embodiment, the pair of the joints is formed by utilizing the suction force of the conveying means. Can be formed. That is, in the core wrap sheet arranging step, as shown in FIG. 10, the second core 4 is attracted to the conveyor belt 32 by the suction force V of the transport means 51 (suction box 53), and the core wrap sheet 5 is the first. The non-overlapping portion with the 1 core 3 is adsorbed on the second core 4 adsorbed on the conveyor belt 32, and the adhesive previously applied to at least one of the second core 4 and the core wrap sheet 5 adsorbed on the second core 4 is used. Both can be joined to form a pair of joints 6 (6X, 6Y).

第２実施形態の製造方法においては、以上のようにして長尺の第２コア４のＣＤの中央部に配置された第１コア３上に長尺のコアラップシート５を配置した後（図１０参照）、図４に示す折り返し手段５６の如き装置を用いて、コアラップシート５のＣＤの両側部５Ｂ，５Ｂを、該第２コア４に巻きかける（巻き下げる）ように、中央部５Ａ側（第２コア４側）に折り返し、長尺の吸収体１を得る。 In the manufacturing method of the second embodiment, after the long core wrap sheet 5 is arranged on the first core 3 arranged at the center of the CD of the long second core 4 as described above (FIG. 10), using a device such as the folding means 56 shown in FIG. 4, the central portion 5A so as to wind (roll down) both side portions 5B and 5B of the CD of the core wrap sheet 5 around the second core 4. Fold back to the side (second core 4 side) to obtain a long absorber 1.

図１１には、本発明の吸収体の製造方法の第３実施形態の図１０相当図が示されている。第３実施形態の製造方法では、第２コア４を構成する２枚の基材シート４Ｓ１，４Ｓ２のうち、前記第１コア配置工程で第１コア３が配置される面とは反対側の面を形成する一方の基材シート４Ｓ２の方が、他方の基材シート４Ｓ１に比べて、ＣＤの長さ（幅）が長く、一方の基材シート４Ｓ２は、他方の基材シート４Ｓ１のＭＤに沿う両側縁からＣＤの外方に延出する、延出部４９を有している。そして、第３実施形態の製造方法では、前記コアラップシート配置工程の後に、この一方の基材シート４Ｓ２の一対の延出部４９，４９をコアラップシート５に巻きかける（巻き上げる）。こうして得られた長尺の吸収体１においては、コアラップシート５のＭＤに沿う両側部が、基材シート４Ｓ２（延出部４９）によって被覆されている。 FIG. 11 shows a diagram corresponding to FIG. 10 according to a third embodiment of the method for producing an absorber of the present invention. In the manufacturing method of the third embodiment, of the two base sheet sheets 4S1 and 4S2 constituting the second core 4, the surface opposite to the surface on which the first core 3 is arranged in the first core arrangement step. The length (width) of the CD of one base sheet 4S2 forming the above is longer than that of the other base sheet 4S1, and one base sheet 4S2 is used as the MD of the other base sheet 4S1. It has an extension 49 that extends outward from the edges along both sides. Then, in the manufacturing method of the third embodiment, after the core wrap sheet arranging step, the pair of extending portions 49, 49 of the one base sheet 4S2 are wound (rolled up) around the core wrap sheet 5. In the long absorber 1 thus obtained, both side portions of the core wrap sheet 5 along the MD are covered with the base material sheet 4S2 (extending portion 49).

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は前記実施形態に何ら制限されるものではなく、本発明の趣旨を逸脱しない範囲で適宜変更可能である。
図１に示す吸収体１では、第１コア３を挟んで縦方向Ｘの両側及び第１コア３を挟んで横方向Ｙの両側の双方に接合部６の対が存在していたが、どちらか一方の側のみに接合部６の対が存在してもよい。
第１コア３は形成材料非存在部３Ｎを有していなくてもよく、また、第１コア３が形成材料非存在部３Ｎを有している場合でも、該形成材料非存在部３Ｎにおいてコアラップシート５と第２コア４とが接合されている必要は無い。しかし前記実施形態のように、形成材料非存在部３Ｎにおいてコアラップシート５と第２コア４とが接合されていることが、本発明の所定の効果を発現させる上では有効である。
前記実施形態では、第１コア３は、少なくとも繊維材料３Ｆを含む積繊タイプの吸収性コアであったが、第２コア４と同様のシートタイプの吸収性コアであってもよい。すなわち第１コア３は、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された繊維材料及び吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されていてもよい。
また、本発明の吸収体の製造方法において、第２コア４の製造工程は必須ではない。
前記第２コア配置工程において、第１コア３が配置され一方向に搬送されるコアラップシート５に、該第１コア３側から枚葉の第２コア４を供給し、該第１コア３を覆うように該コアラップシート５上に配置してもよい。
前記コアラップシート配置工程において、第１コア３が配置され一方向に搬送される第２コア４に、該第１コア３側から枚葉のコアラップシート５を供給し、該第１コア３を覆うように該第２コア４上に配置してもよい。
前述した本発明の実施形態に関し、更に以下の付記を開示する。 Although the present invention has been described above based on the preferred embodiment, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the spirit of the present invention.
In the absorber 1 shown in FIG. 1, a pair of joints 6 existed on both sides in the vertical direction X across the first core 3 and on both sides in the horizontal direction Y with the first core 3 in between. A pair of joints 6 may be present on only one side.
The first core 3 does not have to have the forming material non-existing portion 3N, and even when the first core 3 has the forming material non-existing portion 3N, the core in the forming material non-existing portion 3N It is not necessary that the lap sheet 5 and the second core 4 are joined. However, as in the above-described embodiment, it is effective that the core wrap sheet 5 and the second core 4 are joined in the forming material non-existing portion 3N in order to exhibit the predetermined effect of the present invention.
In the above embodiment, the first core 3 is a product fiber type absorbent core containing at least the fiber material 3F, but may be a sheet type absorbent core similar to the second core 4. That is, the first core 3 contains two base sheets facing each other, a fiber material and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are connected to each other. They may be bonded to each other by an adhesive.
Further, in the method for producing an absorber of the present invention, the manufacturing process of the second core 4 is not essential.
In the second core arranging step, the single-wafered second core 4 is supplied from the first core 3 side to the core wrap sheet 5 in which the first core 3 is arranged and conveyed in one direction, and the first core 3 is supplied. May be placed on the core wrap sheet 5 so as to cover the core wrap sheet 5.
In the core wrap sheet arranging step, a single-wafer core wrap sheet 5 is supplied from the first core 3 side to the second core 4 in which the first core 3 is arranged and conveyed in one direction, and the first core 3 is provided. It may be arranged on the second core 4 so as to cover the second core 4.
The following additional notes will be further disclosed with respect to the above-described embodiments of the present invention.

＜１＞
着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体であって、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている吸収体。
＜２＞
前記第１コアにおける前記接合部の対に挟まれた部分で且つ該第１コアの形成材料が存在する部分を前記圧縮された状態から解放したときの、前記吸収体の該部分での厚みは、該圧縮された状態からの解放前に比べて厚く、両者の厚み差が、０．０８ｍｍ以上１．００ｍｍ以下である、前記＜１＞に記載の吸収体。 <1>
Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. An absorber having a core wrap sheet of
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
An absorber in which a portion of the first core sandwiched between pairs of joints is compressed in the thickness direction by the core wrap sheet and the second core.
<2>
The thickness of the absorber at the portion when the portion of the first core sandwiched between the pairs of the joint portions and the portion where the forming material of the first core exists is released from the compressed state is The absorber according to <1>, wherein the absorber is thicker than before being released from the compressed state, and the thickness difference between the two is 0.08 mm or more and 1.00 mm or less.

＜３＞
前記第１コアを挟んで前記横方向の両側に、前記接合部（縦接合部）の対が一組存在するか、又は
前記第１コアを挟んで前記横方向の両側に、前記接合部（縦接合部）の対が複数組存在し、且つその複数の接合部（縦接合部）の対が前記縦方向に間欠配置されているか、又は
前記第１コアを挟んで前記縦方向の両側に、前記接合部（横接合部）の対が一組存在するか、又は
前記第１コアを挟んで前記縦方向の両側に、前記接合部（横接合部）の対が複数組存在し、且つその複数の接合部（横接合部）の対が前記横方向に間欠配置されている、前記＜１＞又は＜２＞に記載の吸収体。
＜４＞
前記第１コアが前記接合部によって包囲され、該第１コアの全体が前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている、前記＜１＞〜＜３＞の何れか１項に記載の吸収体。 <3>
There is a pair of the joints (longitudinal joints) on both sides of the first core in the lateral direction, or the joints ( There are a plurality of pairs of vertical joints), and the pairs of the plurality of joints (longitudinal joints) are intermittently arranged in the vertical direction, or on both sides of the first core in the vertical direction. , There is one pair of the joints (horizontal joints), or there are a plurality of pairs of the joints (horizontal joints) on both sides of the first core in the vertical direction. The absorber according to <1> or <2>, wherein a pair of the plurality of joints (horizontal joints) is intermittently arranged in the lateral direction.
<4>
The first core is surrounded by the joint, and the entire first core is compressed in the thickness direction by the core wrap sheet and the second core. <1> to <3> The absorber according to any one of the above items.

＜５＞
前記第１コアは、該第１コアにおける前記接合部の対に挟まれた部分に、該第１コアの厚み方向の全域にわたって該第１コアの形成材料が存在しない形成材料非存在部を有し、
前記形成材料非存在部において、前記コアラップシートと前記第２コアとが接合されている、前記＜１＞〜＜４＞の何れか１項に記載の吸収体。
＜６＞
前記形成材料非存在部の前記縦方向の長さが、好ましくは３０ｍｍ以上、より好ましくは５０ｍｍ以上、そして、好ましくは２５０ｍｍ以下、より好ましくは２００ｍｍ以下である、前記＜５＞に記載の吸収体。
＜７＞
前記形成材料非存在部の前記横方向の長さ（幅）が、好ましくは３ｍｍ以上、より好ましくは５ｍｍ以上、そして、好ましくは３０ｍｍ以下、より好ましくは２０ｍｍ以下である、前記＜５＞又は＜６＞に記載の吸収体。
＜８＞
前記横方向に隣り合う２個の前記形成材料非存在部どうしの間隔が、好ましくは５ｍｍ以上、より好ましくは１０ｍｍ以上、そして、好ましくは１００ｍｍ以下、より好ましくは７０ｍｍ以下である、前記＜５＞〜＜７＞の何れか１項に記載の吸収体。 <5>
The first core has a forming material non-existing portion in a portion of the first core sandwiched between pairs of the joining portions, in which the forming material of the first core does not exist over the entire area in the thickness direction of the first core. And
The absorber according to any one of <1> to <4>, wherein the core wrap sheet and the second core are joined in the non-existent portion of the forming material.
<6>
The absorber according to <5>, wherein the length of the non-existent portion of the forming material in the longitudinal direction is preferably 30 mm or more, more preferably 50 mm or more, and preferably 250 mm or less, more preferably 200 mm or less. ..
<7>
The length (width) of the non-existent portion of the forming material in the lateral direction is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 20 mm or less. 6> The absorber according to.
<8>
The distance between the two non-existing portions of the forming material adjacent to each other in the lateral direction is preferably 5 mm or more, more preferably 10 mm or more, and preferably 100 mm or less, more preferably 70 mm or less. The absorber according to any one of ~ <7>.

＜９＞
前記第１コアに吸水性ポリマーが含有されている、前記＜１＞〜＜８＞の何れか１項に記載の吸収体。
＜１０＞
前記第１コアにおける吸水性ポリマーの坪量が、好ましくは４０ｇ／ｍ２以上、より好ましくは６０ｇ／ｍ２以上、そして、好ましくは４５０ｇ／ｍ２以下、より好ましくは３５０ｇ／ｍ２以下である、前記＜９＞に記載の吸収体。
＜１１＞
前記第１コアは、前記第２コアに比べて、吸水性ポリマーの坪量（単位面積当たりの質量）が大きい、前記＜９＞又は＜１０＞に記載の吸収体。
＜１２＞
前記第１コアの吸水性ポリマーの坪量と前記第２コアの吸水性ポリマーの坪量との比率が、前者／後者として、好ましくは１．１以上、より好ましくは１．５以上、そして、好ましくは３以下、より好ましくは２．５以下である、前記＜１１＞に記載の吸収体。
＜１３＞
前記第２コアの吸水性ポリマーの坪量が、好ましくは５０ｇ／ｍ２以上、より好ましくは８０ｇ／ｍ２以上、そして、好ましくは２００ｇ／ｍ２以下、より好ましくは１５０ｇ／ｍ２以下である、前記＜１０＞〜＜１２＞の何れか１項に記載の吸収体。 <9>
The absorber according to any one of <1> to <8>, wherein the first core contains a water-absorbent polymer.
<10>
The basis weight of the water-absorbent polymer in the first core is preferably 40 g / m 2 or more, more preferably 60 g / m 2 or more, and preferably 450 g / m 2 or less, more preferably 350 g / m 2 or less. , The absorber according to <9> above.
<11>
The absorber according to <9> or <10>, wherein the first core has a larger basis weight (mass per unit area) of the water-absorbent polymer than the second core.
<12>
The ratio of the basis weight of the water-absorbent polymer of the first core to the basis weight of the water-absorbent polymer of the second core is preferably 1.1 or more, more preferably 1.5 or more as the former / latter, and The absorber according to <11>, preferably 3 or less, more preferably 2.5 or less.
<13>
The basis weight of the water-absorbent polymer of the second core is preferably 50 g / m 2 or more, more preferably 80 g / m 2 or more, and preferably 200 g / m 2 or less, more preferably 150 g / m 2 or less. , The absorber according to any one of <10> to <12>.

＜１４＞
前記第１コアと前記第２コアとが接着剤によって接合されている、前記＜１＞〜＜１３＞の何れか１項に記載の吸収体。
＜１５＞
前記コアラップシートは１枚のシートであり、該コアラップシートの前記横方向の長さ（幅）が、前記吸収性コアの該横方向の長さ（幅）の１．１倍以上３倍以下である、前記＜１＞〜＜１４＞の何れか１項に記載の吸収体。
＜１６＞
前記コアラップシートは、前記吸収性コアの肌対向面の全域を被覆し、且つ該吸収性コアの前記縦方向に沿う両側縁から前記横方向の外方に延出し、そのコアラップシートの延出部が、該吸収性コアの非肌対向面側に巻きかけられて、該吸収性コアの非肌対向面の全域を被覆している、前記＜１５＞に記載の吸収体。
＜１７＞
前記吸収性コアの非肌対向面の前記横方向の中央部には、前記コアラップシートの前記縦方向に沿う両側縁部どうしが重なった重複部が形成されている、前記＜１５＞又は＜１６＞に記載の吸収体。
＜１８＞
前記第１コアは、前記横方向の長さ（幅）が前記縦方向の全長にわたって一定ではなく、該第１コアの該縦方向の一端側は、他端側に比べて該横方向の長さが長く幅広である、前記＜１＞〜＜１７＞の何れか１項に記載の吸収体。
＜１９＞
前記第１コアの坪量が、好ましくは５０ｇ／ｍ２以上、より好ましくは８０ｇ／ｍ２以上、そして、好ましくは２５０ｇ／ｍ２以下、より好ましくは２００ｇ／ｍ２以下である、前記＜１＞〜＜１８＞の何れか１項に記載の吸収体。
＜２０＞
１枚の前記基材シートの坪量が、好ましくは５ｇ／ｍ２以上、より好ましくは７ｇ／ｍ２以上、そして、好ましくは５０ｇ／ｍ２以下、より好ましくは４０ｇ／ｍ２以下である、前記＜１＞〜＜１９＞の何れか１項に記載の吸収体。
＜２１＞
・前記第１コアの前記第２コアとの接触圧が、０．０５ｋＰａ以上である、前記＜１＞〜＜２０＞の何れか１項に記載の吸収体。
・前記吸収体の製造工程において前記第１コアと前記第２コアとの接触圧が０．０５ｋＰａ以上となるように調整されている、前記＜１＞〜＜２０＞の何れか１項に記載の吸収体。
＜２２＞
前記第１コアの前記第２コアとの接触圧が、好ましくは０．０５ｋＰａ以上、より好ましくは０．０７ｋＰａ以上、そして、好ましくは０．２ｋＰａ以下、より好ましくは０．１ｋＰａ以下である、前記＜１＞〜＜２１＞の何れか１項に記載の吸収体。 <14>
The absorber according to any one of <1> to <13>, wherein the first core and the second core are bonded by an adhesive.
<15>
The core wrap sheet is a single sheet, and the lateral length (width) of the core wrap sheet is 1.1 times or more and 3 times the lateral length (width) of the absorbent core. The absorber according to any one of <1> to <14> below.
<16>
The core wrap sheet covers the entire surface of the absorbent core facing the skin, and extends outward from both side edges of the absorbent core along the longitudinal direction in the lateral direction, and the core wrap sheet extends. The absorber according to <15>, wherein the protruding portion is wrapped around the non-skin facing surface side of the absorbent core to cover the entire non-skin facing surface of the absorbent core.
<17>
An overlapping portion in which both side edges of the core wrap sheet along the vertical direction overlap each other is formed in the central portion of the non-skin facing surface of the absorbent core in the lateral direction. 16>.
<18>
The length (width) of the first core in the horizontal direction is not constant over the entire length in the vertical direction, and one end side of the first core in the vertical direction is longer in the horizontal direction than the other end side. The absorber according to any one of <1> to <17>, which is long and wide.
<19>
The basis weight of the first core is preferably 50 g / m 2 or more, more preferably 80 g / m 2 or more, and preferably 250 g / m 2 or less, more preferably 200 g / m 2 or less. > To the absorber according to any one of <18>.
<20>
The basis weight of one base sheet is preferably 5 g / m 2 or more, more preferably 7 g / m 2 or more, and preferably 50 g / m 2 or less, more preferably 40 g / m 2 or less. The absorber according to any one of <1> to <19>.
<21>
The absorber according to any one of <1> to <20>, wherein the contact pressure of the first core with the second core is 0.05 kPa or more.
The item according to any one of <1> to <20>, wherein the contact pressure between the first core and the second core is adjusted to be 0.05 kPa or more in the manufacturing process of the absorber. Absorber.
<22>
The contact pressure of the first core with the second core is preferably 0.05 kPa or more, more preferably 0.07 kPa or more, and preferably 0.2 kPa or less, more preferably 0.1 kPa or less. The absorber according to any one of <1> to <21>.

＜２３＞
着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体で、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている、吸収体の製造方法であって、
一方向に搬送される前記コアラップシート上に前記第１コアを配置する、第１コア配置工程と、
前記第１コアが配置され一方向に搬送される前記コアラップシートに、該第１コア側から前記第２コアを供給し、該第１コアを覆うように該コアラップシート上に配置する、第２コア配置工程とを有し、
前記第１コア配置工程では、前記コアラップシート上に配置された前記第１コアを挟んで該コアラップシートの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、該コアラップシートの該第１コアとの非重複部が存在するように、該第１コアを配置し、
前記第２コア配置工程では、前記コアラップシート上に配置された前記第１コアを挟んで該コアラップシートの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、前記第２コアの該第１コアとの非重複部が存在するように、該第２コアを配置し、且つ
前記第２コアで前記第１コアを前記コアラップシート側に押圧することで該第１コアを厚み方向に圧縮しつつ、該第１コアを挟んで前記搬送方向の両側及び該第１コアを挟んで前記搬送直交方向の両側のうちの少なくとも一方の両側にて、該コアラップシート及び該第２コアそれぞれの前記非重複部どうしを接合して前記接合部の対を形成する、吸収体の製造方法。
＜２４＞
前記コアラップシートは、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段の該搬送面上に配置されて搬送され、
前記第２コア配置工程では、前記搬送手段による吸引により、前記コアラップシートを前記搬送面に吸着させるとともに、前記第２コアの前記第１コアとの非重複部を、該搬送面に吸着された該コアラップシートに吸着させ、該コアラップシート及びこれに吸着する該第２コアの少なくとも一方に予め付与された接着剤によって両者を接合する、前記＜２３＞に記載の吸収体の製造方法。
＜２５＞
前記第２コア配置工程では、前記第２コアによる前記第１コアの圧縮を、搬送時の張力がかかっている状態の該第２コアで該第１コアを押圧することによって実施する、前記＜２３＞又は＜２４＞に記載の吸収体の製造方法。
＜２６＞
前記第２コア配置工程では、前記第２コアによる前記第１コアの圧縮を、該第１コア上に該第２コアを重ねつつ、該第２コアを押圧ロールで該第１コア側に押圧することによって実施する、前記＜２３＞〜＜２５＞の何れか１項に記載の吸収体の製造方法。
＜２７＞
一方向に搬送される前記コアラップシート上に前記第１コアを配置する前に、該コアラップシートにおける該第１コアの配置面に接着剤を塗布する接着剤塗布工程を有し、
前記接着剤塗布工程では、前記第１コアの配置面の少なくとも一部に、接着剤を、平面視で前記コアラップシートの搬送方向に延びるスパイラル状に塗布する、前記＜２３＞〜＜２６＞の何れか１項に記載の吸収体の製造方法。
＜２８＞
一方向に搬送される前記コアラップシート上に前記第１コアを配置する前に、該コアラップシートにおける該第１コアの配置面に接着剤を塗布する接着剤塗布工程を有し、
前記接着剤塗布工程では、前記第１コアの配置面における前記コアラップシートの搬送方向と直交する方向（ＣＤ）の中央部と両側部とで、接着剤の塗布パターンを異ならせる、前記＜２３＞〜＜２７＞の何れか１項に記載の吸収体の製造方法。
＜２９＞
前記第１コア配置工程後で且つ前記コアラップシート上に配置された前記第１コア上に前記第２コアを配置する前に、該第１コアを該コアラップシート側に押圧する、前記＜２３＞〜＜２８＞の何れか１項に記載の吸収体の製造方法。 <23>
Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. With an absorber that has a core wrap sheet
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
A method for producing an absorber, wherein a portion of the first core sandwiched between pairs of joints is compressed in the thickness direction by the core wrap sheet and the second core.
A first core arranging step of arranging the first core on the core wrap sheet conveyed in one direction, and
The second core is supplied from the first core side to the core wrap sheet in which the first core is arranged and conveyed in one direction, and the second core is arranged on the core wrap sheet so as to cover the first core. Has a second core placement process
In the first core arranging step, both sides of the core wrap sheet arranged on the core wrap sheet in the transport direction and the transport orthogonal direction orthogonal to the transport direction across the first core. The first core is arranged so that the non-overlapping portion of the core wrap sheet with the first core exists on both sides of at least one of the two sides of the core wrap sheet.
In the second core arranging step, both sides of the core wrap sheet in the transport direction sandwiching the first core arranged on the core wrap sheet and the transport orthogonal direction orthogonal to the transport direction across the first core. The second core is arranged so that the non-overlapping portion of the second core with the first core exists on both sides of at least one of the two sides of the second core, and the first core is formed by the second core. While compressing the first core in the thickness direction by pressing against the core wrap sheet side, the first core is sandwiched between both sides in the transport direction and the first core is sandwiched between both sides in the transport orthogonal direction. A method for producing an absorber, in which the core wrap sheet and the non-overlapping portions of the second core are joined to each other to form a pair of the joint portions on both sides of at least one of the two cores.
<24>
The core wrap sheet is arranged and transported on the transport surface of the transport means capable of sucking and transporting the object to be transported on the transport surface.
In the second core arranging step, the core wrap sheet is adsorbed on the transport surface by suction by the transport means, and the non-overlapping portion of the second core with the first core is sucked on the transport surface. The method for producing an absorber according to <23>, wherein the adsorbent is adsorbed on the core wrap sheet and the two are bonded to the core wrap sheet and at least one of the second core adsorbed on the core wrap sheet with an adhesive previously applied. ..
<25>
In the second core arranging step, compression of the first core by the second core is performed by pressing the first core with the second core in a state where tension is applied during transportation. 23> or <24>. The method for producing an absorber.
<26>
In the second core arranging step, the compression of the first core by the second core is performed by superimposing the second core on the first core and pressing the second core toward the first core side with a pressing roll. The method for producing an absorber according to any one of <23> to <25>, which is carried out by the above.
<27>
It has an adhesive application step of applying an adhesive to the arrangement surface of the first core in the core wrap sheet before arranging the first core on the core wrap sheet conveyed in one direction.
In the adhesive application step, the adhesive is applied to at least a part of the arrangement surface of the first core in a spiral shape extending in the transport direction of the core wrap sheet in a plan view. The method for producing an absorber according to any one of the above items.
<28>
It has an adhesive application step of applying an adhesive to the arrangement surface of the first core in the core wrap sheet before arranging the first core on the core wrap sheet conveyed in one direction.
In the adhesive application step, the adhesive application pattern is different between the central portion and both side portions in the direction (CD) orthogonal to the transport direction of the core wrap sheet on the arrangement surface of the first core. > To the method for producing an absorber according to any one of <27>.
<29>
After the first core arranging step and before arranging the second core on the first core arranged on the core wrap sheet, the first core is pressed toward the core wrap sheet side. 23> The method for producing an absorber according to any one of <28>.

＜３０＞
着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体で、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている、吸収体の製造方法であって、
一方向に搬送される前記第２コア上に前記第１コアを配置する、第１コア配置工程と、
前記第１コアが配置され一方向に搬送される前記第２コアに、該第１コア側から前記コアラップシートを供給し、該第１コアを覆うように該第２コア上に配置する、コアラップシート配置工程とを有し、
前記第１コア配置工程では、前記第２コア上に配置された前記第１コアを挟んで該第２コアの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、該第２コアの該第１コアとの非重複部が存在するように、該第１コアを配置し、
前記コアラップシート配置工程では、前記第２コア上に配置された前記第１コアを挟んで該第２コアの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、前記コアラップシートの該第１コアとの非重複部が存在するように、該コアラップシートを配置し、且つ
前記コアラップシートで前記第１コアを前記第２コア側に押圧することで該第１コアを厚み方向に圧縮しつつ、該第１コアを挟んで前記搬送方向の両側及び該第１コアを挟んで前記搬送直交方向の両側のうちの少なくとも一方の両側にて、該第２コア及び該コアラップシートそれぞれの前記非重複部どうしを接合して前記接合部の対を形成する、吸収体の製造方法。
＜３１＞
前記第２コアは、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段の該搬送面上に配置されて搬送され、
前記コアラップシート配置工程では、前記搬送手段による吸引により、前記第２コアを前記搬送面に吸着させるとともに、前記コアラップシートの前記第１コアとの非重複部を、該搬送面に吸着された該第２コアに吸着させ、該第２コア及びこれに吸着する該コアラップシートの少なくとも一方に予め付与された接着剤によって両者を接合する、前記＜３０＞に記載の吸収体の製造方法。
＜３２＞
前記第２コアを構成する２枚の前記基材シートのうち、前記第１コア配置工程で前記第１コアが配置される面とは反対側の面を形成する一方の基材シートの方が、他方の基材シートに比べて、前記搬送直交方向の長さが長く、該一方の基材シートは、該他方の基材シートの前記搬送方向に沿う両側縁から該搬送直交方向の外方に延出する、延出部を有しており、
前記コアラップシート配置工程の後に、前記一方の基材シートの前記延出部を前記コアラップシートに巻きかける、前記＜３０＞又は＜３１＞に記載の吸収体の製造方法。 <30>
Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. With an absorber that has a core wrap sheet
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
A method for producing an absorber, wherein a portion of the first core sandwiched between pairs of joints is compressed in the thickness direction by the core wrap sheet and the second core.
A first core arranging step of arranging the first core on the second core conveyed in one direction, and
The core wrap sheet is supplied from the first core side to the second core in which the first core is arranged and conveyed in one direction, and is arranged on the second core so as to cover the first core. Has a core wrap sheet placement process
In the first core arranging step, both sides of the first core arranged on the second core in the transport direction of the second core and the transport orthogonal direction orthogonal to the transport direction across the first core. The first core is arranged so that the non-overlapping portion of the second core with the first core exists on both sides of at least one of the two sides of the second core.
In the core wrap sheet arranging step, both sides of the first core arranged on the second core in the transport direction of the second core and the transport orthogonal direction orthogonal to the transport direction across the first core. The core wrap sheet is arranged so that the non-overlapping portion of the core wrap sheet with the first core exists on both sides of at least one of the two sides of the core wrap sheet, and the first core is formed by the core wrap sheet. While compressing the first core in the thickness direction by pressing it toward the second core side, the first core is sandwiched between both sides in the transport direction and the first core is sandwiched between both sides in the transport orthogonal direction. A method for producing an absorber, wherein the non-overlapping portions of the second core and the core wrap sheet are joined to each other to form a pair of the joint portions on both sides of at least one of the two.
<31>
The second core is arranged and transported on the transport surface of the transport means capable of sucking and transporting the object to be transported on the transport surface.
In the core wrap sheet arranging step, the second core is adsorbed on the conveying surface by suction by the conveying means, and the non-overlapping portion of the core wrap sheet with the first core is adsorbed on the conveying surface. The method for producing an absorber according to <30>, wherein the adsorbent is adsorbed on the second core and the two cores and at least one of the core wrap sheets adsorbed on the second core are bonded to each other with an adhesive previously applied. ..
<32>
Of the two base sheet sheets constituting the second core, one of the base sheet sheets forming the surface opposite to the surface on which the first core is arranged in the first core arrangement step is the one. , The length in the transport orthogonal direction is longer than that of the other base sheet, and the one base sheet is outward from both side edges of the other base sheet along the transport direction in the transport orthogonal direction. Has an extension part that extends to
The method for producing an absorber according to <30> or <31>, wherein after the core wrap sheet arranging step, the extending portion of the one base sheet is wound around the core wrap sheet.

＜３３＞
更に前記第２コアの製造工程を有し、
前記第２コアの製造工程は、一方向に搬送される長尺の基材シートの一方の面に接着剤を付与した後、更に吸水性ポリマーを散布し付着させる吸水性ポリマー散布工程と、該基材シートの一方の面に別の長尺の基材シートを重ね合わせて長尺の第２コアを得る工程とを有する、前記＜２３＞〜＜３２＞の何れか１項に記載の吸収体の製造方法。
＜３４＞
前記吸水性ポリマー散布工程では、前記基材シートの一方の面に前記吸水性ポリマーの非付着領域が該基材シートの搬送方向に間欠配置されるように、該吸水性ポリマーを間欠的に散布し、
前記長尺の第２コアを切断する際には、前記吸水性ポリマーの非付着領域にて該長尺の第２コアを切断する、前記＜３３＞に記載の吸収体の製造方法。
＜３５＞
前記吸水性ポリマー散布工程では、前記基材シートから所定距離離間した位置に配置された前記吸水性ポリマーの散布手段から該基材シートに向けて該吸水性ポリマーを連続的に散布しつつ、該散布手段から散布された該吸水性ポリマーの一部を該基材シートに付着する前に採取する操作を所定の時間間隔を置いて繰り返し実施することで、該吸水性ポリマーを間欠的に散布しており、
前記操作によって採取された吸水性ポリマーを、前記第１コアの製造工程及び／又は前記第２コアの製造工程に供給する、前記＜３４＞に記載の吸収体の製造方法。
＜３６＞
前記長尺の第２コアの一方の面（前記第１コアとの対向面）に、接着剤を、平面視で該長尺の第２コアの搬送方向に延びるスパイラル状に塗布する、前記＜３３＞〜＜３５＞の何れか１項に記載の吸収体の製造方法。
＜３７＞
前記長尺の第２コアの一方の面（前記第１コアとの対向面）に、接着剤を、平面視スパイラル状の該接着剤の塗布部が、該長尺の第２コアの搬送方向と直交する方向（ＣＤ）に複数並べて配置されるように塗布する、前記＜３３＞〜＜３６＞の何れか１項に記載の吸収体の製造方法。 <33>
Further, it has the manufacturing process of the second core.
The manufacturing process of the second core includes a water-absorbent polymer spraying step of applying an adhesive to one surface of a long base sheet transported in one direction and then further spraying and adhering a water-absorbent polymer. The absorption according to any one of <23> to <32>, which comprises a step of superimposing another long base sheet on one surface of the base sheet to obtain a long second core. How to make a body.
<34>
In the water-absorbent polymer spraying step, the water-absorbent polymer is intermittently sprayed so that the non-adherent region of the water-absorbent polymer is intermittently arranged on one surface of the base material sheet in the transport direction of the base material sheet. And
The method for producing an absorber according to <33>, wherein when the long second core is cut, the long second core is cut at a non-adherent region of the water-absorbent polymer.
<35>
In the water-absorbent polymer spraying step, the water-absorbent polymer is continuously sprayed from the water-absorbent polymer spraying means arranged at a predetermined distance from the base material sheet toward the base material sheet, and the water-absorbent polymer is continuously sprayed. The water-absorbent polymer is intermittently sprayed by repeatedly performing an operation of collecting a part of the water-absorbent polymer sprayed from the spraying means before adhering to the base material sheet at predetermined time intervals. And
The method for producing an absorber according to <34>, wherein the water-absorbent polymer collected by the operation is supplied to the manufacturing process of the first core and / or the manufacturing process of the second core.
<36>
The adhesive is applied to one surface of the long second core (the surface facing the first core) in a spiral shape extending in the transport direction of the long second core in a plan view. 33> The method for producing an absorber according to any one of <35>.
<37>
An adhesive is applied to one surface of the long second core (the surface facing the first core), and the coating portion of the adhesive in a spiral shape in a plan view is in a transport direction of the long second core. The method for producing an absorber according to any one of <33> to <36>, wherein a plurality of the absorbents are applied side by side in a direction (CD) orthogonal to the above.

以下、本発明を実施例により更に具体的に説明するが、本発明は斯かる実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to such Examples.

〔実施例１〕
前述した吸収体１と同様の構成の吸収体、すなわち、「第１コア及び第２コアの積層構造からなる吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有し、且つ該第１コアの周縁の全体が該第２コアの周縁よりも内方に位置し、該第１コアが配されていない該第２コアの肌対向面の周縁部に、記コアラップシートと該第２コアとが該第１コアを介在させずに直接接合された接合部が一組以上の対となって存在している構成の吸収体」を、前述した第１実施形態の製造方法（図４参照）と同様の方法で製造し、実施例１の吸収体とした。実施例１の吸収体において、第１コアは、木材パルプからなる繊維集合体に吸水性ポリマー粒子を担持させた構成を有する、いわゆる積繊タイプの吸収性コアであり、第１コアの坪量３３０ｇ／ｍ２、吸水性ポリマーの坪量１９０ｇ／ｍ２であった。また第２コアは、坪量１０ｇ／ｍ２のＳＭＳ不織布と坪量１６ｇ／ｍ２の紙からなる２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマー粒子とを含み、該２枚の基材シートどうしが接着剤によって互いに接合された構成を有する、いわゆるシートタイプの吸収性コアであり、第２コアの坪量１３６ｇ／ｍ２、吸水性ポリマーの坪量１１０ｇ／ｍ２であった。また、コアラップシートとして、坪量１０ｇ／ｍ２のＳＭＳ不織布を用いた。 [Example 1]
An absorber having the same configuration as that of the absorber 1 described above, that is, "an absorbent core having a laminated structure of a first core and a second core, and a liquid-permeable core wrap sheet that covers the outer surface of the absorbent core. The entire peripheral edge of the first core is located inward of the peripheral edge of the second core, and the peripheral edge of the skin-facing surface of the second core is not arranged with the first core. The above-mentioned first absorber has a structure in which one or more pairs of joints in which the core wrap sheet and the second core are directly joined without interposing the first core are present. It was produced by the same method as the production method of the embodiment (see FIG. 4), and used as the absorber of Example 1. In the absorber of Example 1, the first core is a so-called stacking type absorbent core having a structure in which water-absorbing polymer particles are supported on a fiber aggregate made of wood pulp, and has a basis weight of the first core. The basis weight of the water-absorbent polymer was 330 g / m 2 , and the basis weight was 190 g / m 2 . The second core has a basis weight 10 g / and two base sheet made of paper SMS nonwoven fabric and basis weight 16g / m 2 of m 2, interposed water-absorbing polymer between the two base sheet It is a so-called sheet-type absorbent core containing particles and having a structure in which the two base sheets are bonded to each other by an adhesive, and has a basis weight of the second core of 136 g / m 2 , which is a water-absorbing polymer. The basis weight was 110 g / m 2 . Further, as the core wrap sheet, an SMS non-woven fabric having a basis weight of 10 g / m 2 was used.

〔比較例１〕
第１コア及び第２コアの積層構造からなる吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体において、第１コア及び第２コアの双方が、木材パルプからなる繊維集合体に吸水性ポリマー粒子を担持させた構成を有する積繊タイプの吸収性コアであるものを製造し、比較例１の吸収体とした。比較例１の吸収体において、第１コアは坪量３００ｇ／ｍ２、吸収性ポリマーの坪量１００ｇ／ｍ２、第２コアは坪量２４０ｇ／ｍ２、吸収性ポリマーの坪量１３０ｇ／ｍ２であり、コアラップシートは坪量１６ｇ／ｍ２の紙であった。比較例１について特に説明しない点については、実施例１についての説明が適宜適用される。 [Comparative Example 1]
In an absorber having an absorbent core having a laminated structure of a first core and a second core and a liquid-permeable core wrap sheet that covers the outer surface of the absorbent core, both the first core and the second core are , A fiber-type absorbent core having a structure in which water-absorbent polymer particles were supported on a fiber aggregate made of wood pulp was produced and used as an absorber of Comparative Example 1. In the absorber of Comparative Example 1, the first core has a basis weight of 300 g / m 2 , the absorbent polymer has a basis weight of 100 g / m 2 , the second core has a basis weight of 240 g / m 2 , and the absorbent polymer has a basis weight of 130 g / m. The core wrap sheet was a paper having a basis weight of 16 g / m 2. The description of Example 1 is appropriately applied to the points not particularly described with reference to Comparative Example 1.

＜評価試験：第１コアの圧縮状態の確認試験＞
各実施例及び比較例の吸収体を用いて使い捨ておむつを作製した。具体的には、市販のパンツ型使い捨ておむつを用意し、用意したおむつの吸収体を、実施例及び比較例の吸収体のうちの１つに変更することで、おむつを作製した。図１２には、こうして作製したパンツ型使い捨ておむつ１１の展開且つ伸長状態における肌対向面側（表面シート側）が示されている。図１２中、符号１２で示す吸収体が、実施例及び比較例の吸収体のうちの１つである。吸収体１２における前述した吸収体１と同様の構成には、吸収体１と同じ符号を付している。
おむつ１１は、吸収体１２以外は、基本的にこの種のパンツ型使い捨ておむつと同様に構成されている。おむつ１１の基本構成について説明すると、おむつ１１は、着用者の前後方向に対応する縦方向Ｘと、該縦方向Ｘに直交する横方向Ｙとを有し、着用者の股間部に配され、着用者の陰茎等の***部に対向する***部対向部を含む股下部Ｂと、該股下部Ｂよりも着用者の腹側（前側）に配される腹側部Ａと、該股下部Ｂよりも着用者の背側（後側）に配される背側部Ｃとの３つに区分される。おむつ１１は、吸収体１２を含む吸収性本体１３と、該吸収性本体１３の非肌対向面側に配置された外装体１４とを備える。吸収性本体１３は、着用者の肌から相対的に近い位置に配置された液透過性の表面シート１５、着用者の肌から相対的に遠い位置に配置された液不透過性若しくは液難透過性又は撥水性の裏面シート（図示せず）、及び表面シート１５と該裏面シートとの間に介在配置された吸収体１２を含む。おむつ１１に使用される材料はこの種のパンツ型おむつに一般的に用いられる材料を適宜用いることができる。
おむつ１１を図１２に示す如き展開且つ伸長状態（パンツ型使い捨ておむつをサイドシール部で切り離して展開状態とし、その展開状態のおむつを各部の弾性部材を伸長させて設計寸法となるまで拡げた状態）とし、符号Ｓａで示す１箇所の測定対象部位の厚みＴ１ｐを前記＜厚みの測定方法＞により測定する。測定対象部位Ｓａは、平面視で４５ｍｍ四方の正方形形状をなし、前記接合部対間存在部（第１コア３における接合部６（６Ｘ，６Ｙ）の対に挟まれた部分）を含む。測定対象部位Ｓａの位置は、第１コアの腹側部側の縦方向端部の横方向中央部であり、具体的には図１２に示すように、第１コア３の腹側部Ａ側の縦方向端３Ｘａから縦方向Ｘの内方に５ｍｍ離間した位置で、且つ吸収性コア２を横方向Ｙに二等分して縦方向Ｘに延びる横中心線ＣＬｙが、測定対象部位Ｓａの横方向Ｙの中央を通る位置である。横中心線ＣＬｙは、展開且つ伸長状態のおむつ１１を横方向Ｙに二等分する直線でもある。前記厚みＴ１ｐは、「第１コア３の前記接合部対間存在部が圧縮された状態から解放される前の、おむつ１１の該接合部対間存在部での厚み」であり、前述した厚みＴ１との違いは、実質的にその厚みを有しているのが吸収体であるか（厚みＴ１）、おむつであるか（厚みＴ１ｐ）だけである。
次に、おむつ１１から測定対象部位Ｓａを厚み方向の全域にわたって切り出し、その切り出した測定対象部位Ｓａの厚みＴ２ｐを前記＜厚みの測定方法＞により測定する。おむつ１１から測定対象部位Ｓａを切り出すことで、前記接合部対間存在部は圧縮された状態から解放される。切り出した測定対象部位Ｓａの外装体の弾性体は切断されており襞の発生はない。前記厚みＴ２ｐは、「第１コア３の前記接合部対間存在部が圧縮された状態から解放された後の、おむつ１１の該接合部対間対応部での厚み」であり、前述した厚みＴ２との違いは、実質的にその厚みを有しているのが吸収体であるか（厚みＴ２）、おむつであるか（厚みＴ２ｐ）だけである。
そして、測定対象部位Ｓａについて、厚み差Ｔ２ｐ−Ｔ１ｐを算出した。その結果を下記表１に示す。 <Evaluation test: Confirmation test of the compressed state of the first core>
Disposable diapers were prepared using the absorbers of each example and comparative example. Specifically, a commercially available pants-type disposable diaper was prepared, and the prepared diaper absorber was changed to one of the absorbers of Examples and Comparative Examples to prepare a diaper. FIG. 12 shows the skin-facing surface side (surface sheet side) of the pants-type disposable diaper 11 thus produced in the unfolded and stretched state. In FIG. 12, the absorber represented by reference numeral 12 is one of the absorbers of Examples and Comparative Examples. The same configuration as that of the absorber 1 described above in the absorber 12 is designated by the same reference numerals as that of the absorber 1.
The diaper 11 is basically configured in the same manner as this type of pants-type disposable diaper except for the absorber 12. Explaining the basic configuration of the diaper 11, the diaper 11 has a vertical direction X corresponding to the front-back direction of the wearer and a horizontal direction Y orthogonal to the vertical direction X, and is arranged in the crotch portion of the wearer. The inseam B including the excretion part facing the excretion part such as the wearer's penis, the ventral part A arranged on the ventral side (anterior side) of the wearer from the crotch part B, and the inseam B. It is divided into three parts, the back side portion C arranged on the back side (rear side) of the wearer. The diaper 11 includes an absorbent main body 13 including an absorbent body 12 and an exterior body 14 arranged on the non-skin facing surface side of the absorbent main body 13. The absorbent body 13 is a liquid-permeable surface sheet 15 arranged at a position relatively close to the wearer's skin, and a liquid-impermeable or impermeable surface sheet placed at a position relatively far from the wearer's skin. Includes a property or water repellent back sheet (not shown) and an absorber 12 interposed between the front surface sheet 15 and the back sheet. As the material used for the diaper 11, a material generally used for this type of pants-type diaper can be appropriately used.
The diaper 11 is in the unfolded and stretched state as shown in FIG. 12 (the pants-type disposable diaper is separated by the side seal portion to be in the unfolded state, and the unfolded diaper is expanded until the elastic members of each part are stretched to reach the design dimensions. ), And the thickness T1p of one measurement target portion indicated by the symbol Sa is measured by the above <thickness measuring method>. The measurement target portion Sa has a square shape of 45 mm square in a plan view, and includes the joint portion paired existing portion (a portion sandwiched between pairs of joint portions 6 (6X, 6Y) in the first core 3). The position of the measurement target portion Sa is the lateral central portion of the vertical end portion on the ventral side of the first core, and specifically, as shown in FIG. 12, the ventral side A side of the first core 3 The horizontal center line CLy extending in the vertical direction X by bisecting the absorbent core 2 in the horizontal direction Y at a position 5 mm inward in the vertical direction X from the vertical end 3Xa of the measurement target portion Sa. It is a position that passes through the center of the lateral direction Y. The horizontal center line CLy is also a straight line that bisects the unfolded and extended diaper 11 in the horizontal direction Y. The thickness T1p is "the thickness of the diaper 11 at the joint-to-pair existence portion of the diaper 11 before the joint-to-interval presence portion of the first core 3 is released from the compressed state", and is the above-mentioned thickness. The only difference from T1 is whether it is the absorber (thickness T1) or the diaper (thickness T1p) that has substantially that thickness.
Next, the measurement target portion Sa is cut out from the diaper 11 over the entire area in the thickness direction, and the thickness T2p of the cut out measurement target portion Sa is measured by the above <thickness measuring method>. By cutting out the measurement target portion Sa from the diaper 11, the joint portion paired existing portion is released from the compressed state. The elastic body of the outer body of the cut-out measurement target portion Sa is cut and no folds are generated. The thickness T2p is "the thickness of the diaper 11 at the joint-to-pair correspondence portion of the diaper 11 after the joint-to-pair existence portion of the first core 3 is released from the compressed state", and is the above-mentioned thickness. The only difference from T2 is whether it is the absorber (thickness T2) or the diaper (thickness T2p) that has substantially that thickness.
Then, the thickness difference T2p-T1p was calculated for the measurement target portion Sa. The results are shown in Table 1 below.

Figure 2021098002
Figure 2021098002

表１に示すとおり、実施例１は、吸収性コアを構成する第１コアが積繊タイプ、第２コアがとシートタイプであるため、両コアが積繊タイプである比較例１に比べて、厚み差Ｔ２ｐ−Ｔ１ｐが大きい結果となった。この結果から、実施例１の吸収体では、第１コア３における接合部６（６Ｘ，６Ｙ）の対に挟まれた部分（前記接合部対間存在部）が、コアラップシート５と第２コア４とによって厚み方向に圧縮された状態となっていたことがわかる。したがって、実施例１の吸収体は、吸収体薄型化の要望にも十分に対応でき、比較的厚みが薄いにもかかわらず吸収容量が多く、且つ***物を吸収しても膨潤しにくく柔軟で保形性に優れる吸収体であると言える。 As shown in Table 1, in Example 1, since the first core constituting the absorbent core is a fiber stack type and the second core is a sheet type, as compared with Comparative Example 1 in which both cores are a product fiber type. The result was that the thickness difference T2p-T1p was large. From this result, in the absorber of Example 1, the portion sandwiched between the pair of the joint portions 6 (6X, 6Y) in the first core 3 (the portion existing between the joint portions) is the core wrap sheet 5 and the second. It can be seen that the core 4 and the core 4 were in a compressed state in the thickness direction. Therefore, the absorber of Example 1 can sufficiently meet the demand for thinner absorbers, has a large absorption capacity despite being relatively thin, and is flexible and does not swell even when excrement is absorbed. It can be said that it is an absorber with excellent shape retention.

１ 吸収体
２ 吸収性コア
３ 第１コア
３Ｎ 形成材料非存在部
３Ｆ 繊維材料
３Ｐ 吸水性ポリマー
４ 第２コア
４Ｓ，４Ｓ１，４Ｓ２ 基材シート
４Ｐ 吸水性ポリマー
４Ｍ 吸水性ポリマーの付着領域
４Ｎ 吸水性ポリマーの非付着領域
５ コアラップシート
６ コアラップシートと第２コアとの接合部
６Ｘ 縦接合部
６Ｙ 横接合部
１０ 吸収体の製造装置
２０ 第１コア製造部
２１ 積繊ドラム
２２ ダクト
２３ エアー吐出装置
３０ 第１搬送部
３１ 搬送手段
３２ コンベアベルト
３３ サクションボックス（吸引手段）
３４，３５ 接着剤の塗布手段
３４Ａ，３５Ａ 接着剤
３６ 押圧ロール
４０ 第２コア製造部
４１，４２，４６ 接着剤の塗布手段
４１Ａ，４２Ａ，４６Ａ 接着剤
４３ 吸水性ポリマーの散布手段
４４，４５ ニップロール
４７ 吸水性ポリマーの回収手段
５０ 第２搬送部
５１ 搬送手段
５２ コンベアベルト
５３，５４ サクションボックス（吸引手段）
５５ 押圧ロール
５６ 折り返し手段
1 Absorbent 2 Absorbent core 3 1st core 3N Non-existent part of forming material 3F Fiber material 3P Water-absorbent polymer 4 2nd core 4S, 4S1, 4S2 Base sheet 4P Water-absorbent polymer 4M Adhesion area of water-absorbent polymer 4N Water-absorbent Non-adhesive area of polymer 5 Core wrap sheet 6 Joint between core wrap sheet and 2nd core 6X Vertical joint 6Y Horizontal joint 10 Absorbent manufacturing equipment 20 1st core manufacturing 21 Stacked fiber drum 22 Duct 23 Air discharge Equipment 30 1st transport unit 31 Transport means 32 Conveyor belt 33 Suction box (suction means)
34,35 Adhesive application means 34A, 35A Adhesive 36 Pressing roll 40 Second core manufacturing unit 41, 42, 46 Adhesive application means 41A, 42A, 46A Adhesive 43 Water-absorbent polymer spraying means 44, 45 Nip roll 47 Water-absorbent polymer recovery means 50 Second transport section 51 Transport means 52 Conveyor belt 53,54 Suction box (suction means)
55 Pressing roll 56 Folding means

Claims (15)

着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体であって、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている吸収体。 Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. An absorber having a core wrap sheet of
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
An absorber in which a portion of the first core sandwiched between pairs of joints is compressed in the thickness direction by the core wrap sheet and the second core. 前記第１コアにおける前記接合部の対に挟まれた部分で且つ該第１コアの形成材料が存在する部分を前記圧縮された状態から解放したときの、前記吸収体の該部分での厚みは、該圧縮された状態からの解放前に比べて厚く、両者の厚み差が、０．０８ｍｍ以上１．００ｍｍ以下である、請求項１に記載の吸収体。 The thickness of the absorber at the portion when the portion of the first core sandwiched between the pairs of the joint portions and the portion where the forming material of the first core exists is released from the compressed state is The absorber according to claim 1, which is thicker than before being released from the compressed state, and the thickness difference between the two is 0.08 mm or more and 1.00 mm or less. 前記第１コアが前記接合部によって包囲され、該第１コアの全体が前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている、請求項１又は２に記載の吸収体。 The first or second aspect of the present invention, wherein the first core is surrounded by the joint, and the entire first core is compressed in the thickness direction by the core wrap sheet and the second core. Absorber. 前記第１コアは、該第１コアにおける前記接合部の対に挟まれた部分に、該第１コアの厚み方向の全域にわたって該第１コアの形成材料が存在しない形成材料非存在部を有し、
前記形成材料非存在部において、前記コアラップシートと前記第２コアとが接合されている、請求項１〜３の何れか１項に記載の吸収体。 The first core has a forming material non-existing portion in a portion of the first core sandwiched between pairs of the joining portions, in which the forming material of the first core does not exist over the entire area in the thickness direction of the first core. And
The absorber according to any one of claims 1 to 3, wherein the core wrap sheet and the second core are joined in the non-existent portion of the forming material. 前記第１コアに吸水性ポリマーが含有されている、請求項１〜４の何れか１項に記載の吸収体。 The absorber according to any one of claims 1 to 4, wherein the first core contains a water-absorbent polymer. 前記第１コアと前記第２コアとが接着剤によって接合されている、請求項１〜５の何れか１項に記載の吸収体。 The absorber according to any one of claims 1 to 5, wherein the first core and the second core are bonded by an adhesive. 着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体で、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている、吸収体の製造方法であって、
一方向に搬送される前記コアラップシート上に前記第１コアを配置する、第１コア配置工程と、
前記第１コアが配置され一方向に搬送される前記コアラップシートに、該第１コア側から前記第２コアを供給し、該第１コアを覆うように該コアラップシート上に配置する、第２コア配置工程とを有し、
前記第１コア配置工程では、前記コアラップシート上に配置された前記第１コアを挟んで該コアラップシートの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、該コアラップシートの該第１コアとの非重複部が存在するように、該第１コアを配置し、
前記第２コア配置工程では、前記コアラップシート上に配置された前記第１コアを挟んで該コアラップシートの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、前記第２コアの該第１コアとの非重複部が存在するように、該第２コアを配置し、且つ
前記第２コアで前記第１コアを前記コアラップシート側に押圧することで該第１コアを厚み方向に圧縮しつつ、該第１コアを挟んで前記搬送方向の両側及び該第１コアを挟んで前記搬送直交方向の両側のうちの少なくとも一方の両側にて、該コアラップシート及び該第２コアそれぞれの前記非重複部どうしを接合して前記接合部の対を形成する、吸収体の製造方法。 Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. With an absorber that has a core wrap sheet
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
A method for producing an absorber, wherein a portion of the first core sandwiched between pairs of joints is compressed in the thickness direction by the core wrap sheet and the second core.
A first core arranging step of arranging the first core on the core wrap sheet conveyed in one direction, and
The second core is supplied from the first core side to the core wrap sheet in which the first core is arranged and conveyed in one direction, and the second core is arranged on the core wrap sheet so as to cover the first core. Has a second core placement process
In the first core arranging step, both sides of the core wrap sheet arranged on the core wrap sheet in the transport direction and the transport orthogonal direction orthogonal to the transport direction across the first core. The first core is arranged so that the non-overlapping portion of the core wrap sheet with the first core exists on both sides of at least one of the two sides of the core wrap sheet.
In the second core arranging step, both sides of the core wrap sheet in the transport direction sandwiching the first core arranged on the core wrap sheet and the transport orthogonal direction orthogonal to the transport direction across the first core. The second core is arranged so that the non-overlapping portion of the second core with the first core exists on both sides of at least one of the two sides of the second core, and the first core is formed by the second core. While compressing the first core in the thickness direction by pressing against the core wrap sheet side, the first core is sandwiched between both sides in the transport direction and the first core is sandwiched between both sides in the transport orthogonal direction. A method for producing an absorber, in which the core wrap sheet and the non-overlapping portions of the second core are joined to each other to form a pair of the joint portions on both sides of at least one of the two cores. 前記コアラップシートは、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段の該搬送面上に配置されて搬送され、
前記第２コア配置工程では、前記搬送手段による吸引により、前記コアラップシートを前記搬送面に吸着させるとともに、前記第２コアの前記第１コアとの非重複部を、該搬送面に吸着された該コアラップシートに吸着させ、該コアラップシート及びこれに吸着する該第２コアの少なくとも一方に予め付与された接着剤によって両者を接合する、請求項７に記載の吸収体の製造方法。 The core wrap sheet is arranged and transported on the transport surface of the transport means capable of sucking and transporting the object to be transported on the transport surface.
In the second core arranging step, the core wrap sheet is adsorbed on the transport surface by suction by the transport means, and the non-overlapping portion of the second core with the first core is sucked on the transport surface. The method for producing an absorber according to claim 7, wherein the adsorbent is adsorbed on the core wrap sheet, and the two are bonded to the core wrap sheet and at least one of the second core adsorbed on the core wrap sheet with an adhesive previously applied. 前記第２コア配置工程では、前記第２コアによる前記第１コアの圧縮を、搬送時の張力がかかっている状態の該第２コアで該第１コアを押圧することによって実施する、請求項７又は８に記載の吸収体の製造方法。 The second core arranging step is claimed by performing compression of the first core by the second core by pressing the first core with the second core in a state where tension is applied during transportation. 7. The method for producing an absorber according to 7. 着用者の前後方向に対応する縦方向とこれに直交する横方向とを有する吸収性物品に用いられ、吸水性材料を含有する吸収性コアと、該吸収性コアの外面を被覆する液透過性のコアラップシートとを有する吸収体で、
前記吸収性コアは、少なくとも繊維材料を形成材料とする第１コアと、該第１コアの肌対向面又は非肌対向面に接触し、該第１コアよりも厚みが薄い第２コアとを有し、
前記第１コアは、前記コアラップシートと前記第２コアとの間に介在配置され、
前記第２コアは、相対向する２枚の基材シートと、該２枚の基材シート間に介在配置された吸水性ポリマーとを含み、該２枚の基材シートどうしは接着剤によって互いに接合されており、
前記第１コアを挟んで前記縦方向の両側及び該第１コアを挟んで前記横方向の両側のうちの少なくとも一方の両側に、前記コアラップシートと前記第２コアとが該第１コアを介在させずに直接接合された接合部が、一組以上の対となって存在しており、
前記第１コアにおける前記接合部の対に挟まれた部分が、前記コアラップシートと前記第２コアとによって厚み方向に圧縮された状態となっている、吸収体の製造方法であって、
一方向に搬送される前記第２コア上に前記第１コアを配置する、第１コア配置工程と、
前記第１コアが配置され一方向に搬送される前記第２コアに、該第１コア側から前記コアラップシートを供給し、該第１コアを覆うように該第２コア上に配置する、コアラップシート配置工程とを有し、
前記第１コア配置工程では、前記第２コア上に配置された前記第１コアを挟んで該第２コアの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、該第２コアの該第１コアとの非重複部が存在するように、該第１コアを配置し、
前記コアラップシート配置工程では、前記第２コア上に配置された前記第１コアを挟んで該第２コアの搬送方向の両側及び該第１コアを挟んで該搬送方向に直交する搬送直交方向の両側のうちの少なくとも一方の両側に、前記コアラップシートの該第１コアとの非重複部が存在するように、該コアラップシートを配置し、且つ
前記コアラップシートで前記第１コアを前記第２コア側に押圧することで該第１コアを厚み方向に圧縮しつつ、該第１コアを挟んで前記搬送方向の両側及び該第１コアを挟んで前記搬送直交方向の両側のうちの少なくとも一方の両側にて、該第２コア及び該コアラップシートそれぞれの前記非重複部どうしを接合して前記接合部の対を形成する、吸収体の製造方法。 Used for absorbent articles having a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction, the absorbent core containing a water-absorbent material and the liquid permeability covering the outer surface of the absorbent core. With an absorber that has a core wrap sheet
The absorbent core includes at least a first core made of a fiber material and a second core that is in contact with a skin-facing surface or a non-skin-facing surface of the first core and is thinner than the first core. Have and
The first core is interposed and arranged between the core wrap sheet and the second core.
The second core contains two base sheets facing each other and a water-absorbing polymer interposed between the two base sheets, and the two base sheets are adhered to each other by an adhesive. It is joined and
The core wrap sheet and the second core form the first core on both sides of the first core in the vertical direction and on both sides of at least one of the sides in the horizontal direction sandwiching the first core. There are one or more pairs of joints that are directly joined without intervention.
A method for producing an absorber, wherein a portion of the first core sandwiched between pairs of joints is compressed in the thickness direction by the core wrap sheet and the second core.
A first core arranging step of arranging the first core on the second core conveyed in one direction, and
The core wrap sheet is supplied from the first core side to the second core in which the first core is arranged and conveyed in one direction, and is arranged on the second core so as to cover the first core. Has a core wrap sheet placement process
In the first core arranging step, both sides of the first core arranged on the second core in the transport direction of the second core and the transport orthogonal direction orthogonal to the transport direction across the first core. The first core is arranged so that the non-overlapping portion of the second core with the first core exists on both sides of at least one of the two sides of the second core.
In the core wrap sheet arranging step, both sides of the first core arranged on the second core in the transport direction of the second core and the transport orthogonal direction orthogonal to the transport direction across the first core. The core wrap sheet is arranged so that the non-overlapping portion of the core wrap sheet with the first core exists on both sides of at least one of the two sides of the core wrap sheet, and the first core is formed by the core wrap sheet. While compressing the first core in the thickness direction by pressing it toward the second core side, the first core is sandwiched between both sides in the transport direction and the first core is sandwiched between both sides in the transport orthogonal direction. A method for producing an absorber, wherein the non-overlapping portions of the second core and the core wrap sheet are joined to each other to form a pair of the joint portions on both sides of at least one of the two. 前記第２コアは、搬送面上の被搬送物を吸引しつつ搬送可能な搬送手段の該搬送面上に配置されて搬送され、
前記コアラップシート配置工程では、前記搬送手段による吸引により、前記第２コアを前記搬送面に吸着させるとともに、前記コアラップシートの前記第１コアとの非重複部を、該搬送面に吸着された該第２コアに吸着させ、該第２コア及びこれに吸着する該コアラップシートの少なくとも一方に予め付与された接着剤によって両者を接合する、請求項１０に記載の吸収体の製造方法。 The second core is arranged and transported on the transport surface of the transport means capable of sucking and transporting the object to be transported on the transport surface.
In the core wrap sheet arranging step, the second core is adsorbed on the conveying surface by suction by the conveying means, and the non-overlapping portion of the core wrap sheet with the first core is adsorbed on the conveying surface. The method for producing an absorber according to claim 10, wherein the adsorbent is adsorbed on the second core, and the two cores and at least one of the core wrap sheets adsorbed on the second core are bonded to each other with an adhesive previously applied. 前記第２コアを構成する２枚の前記基材シートのうち、前記第１コア配置工程で前記第１コアが配置される面とは反対側の面を形成する一方の基材シートの方が、他方の基材シートに比べて、前記搬送直交方向の長さが長く、該一方の基材シートは、該他方の基材シートの前記搬送方向に沿う両側縁から該搬送直交方向の外方に延出する、延出部を有しており、
前記コアラップシート配置工程の後に、前記一方の基材シートの前記延出部を前記コアラップシートに巻きかける、請求項１０又は１１に記載の吸収体の製造方法。 Of the two base sheet sheets constituting the second core, one of the base sheet sheets forming the surface opposite to the surface on which the first core is arranged in the first core arrangement step is the one. , The length in the transport orthogonal direction is longer than that of the other base sheet, and the one base sheet is outward from both side edges of the other base sheet along the transport direction in the transport orthogonal direction. Has an extension part that extends to
The method for producing an absorber according to claim 10 or 11, wherein after the core wrap sheet arranging step, the extending portion of the one base sheet is wound around the core wrap sheet. 更に前記第２コアの製造工程を有し、
前記第２コアの製造工程は、一方向に搬送される長尺の基材シートの一方の面に接着剤を付与した後、更に吸水性ポリマーを散布し付着させる吸水性ポリマー散布工程と、該基材シートの一方の面に別の長尺の基材シートを重ね合わせて長尺の第２コアを得る工程とを有する、請求項７〜１２の何れか１項に記載の吸収体の製造方法。 Further, it has the manufacturing process of the second core.
The manufacturing process of the second core includes a water-absorbent polymer spraying step of applying an adhesive to one surface of a long base sheet transported in one direction and then further spraying and adhering a water-absorbent polymer. The absorber according to any one of claims 7 to 12, further comprising a step of superimposing another long base sheet on one surface of the base sheet to obtain a long second core. Method. 前記吸水性ポリマー散布工程では、前記基材シートの一方の面に前記吸水性ポリマーの非付着領域が該基材シートの搬送方向に間欠配置されるように、該吸水性ポリマーを間欠的に散布し、
前記長尺の第２コアを切断する際には、前記吸水性ポリマーの非付着領域にて該長尺の第２コアを切断する、請求項１３に記載の吸収体の製造方法。 In the water-absorbent polymer spraying step, the water-absorbent polymer is intermittently sprayed so that the non-adherent region of the water-absorbent polymer is intermittently arranged on one surface of the base material sheet in the transport direction of the base material sheet. And
The method for producing an absorber according to claim 13, wherein when the long second core is cut, the long second core is cut at a non-adherent region of the water-absorbent polymer. 前記吸水性ポリマー散布工程では、前記基材シートから所定距離離間した位置に配置された前記吸水性ポリマーの散布手段から該基材シートに向けて該吸水性ポリマーを連続的に散布しつつ、該散布手段から散布された該吸水性ポリマーの一部を該基材シートに付着する前に採取する操作を所定の時間間隔を置いて繰り返し実施することで、該吸水性ポリマーを間欠的に散布しており、
前記操作によって採取された吸水性ポリマーを、前記第１コアの製造工程及び／又は前記第２コアの製造工程に供給する、請求項１４に記載の吸収体の製造方法。
In the water-absorbent polymer spraying step, the water-absorbent polymer is continuously sprayed from the water-absorbent polymer spraying means arranged at a predetermined distance from the base material sheet toward the base material sheet, and the water-absorbent polymer is continuously sprayed. The water-absorbent polymer is intermittently sprayed by repeatedly performing an operation of collecting a part of the water-absorbent polymer sprayed from the spraying means before adhering to the base material sheet at predetermined time intervals. And
The method for producing an absorber according to claim 14, wherein the water-absorbent polymer collected by the operation is supplied to the manufacturing process of the first core and / or the manufacturing process of the second core.
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