JP4971109B2 - Disposable diapers - Google Patents

Disposable diapers Download PDF

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Publication number
JP4971109B2
JP4971109B2 JP2007295027A JP2007295027A JP4971109B2 JP 4971109 B2 JP4971109 B2 JP 4971109B2 JP 2007295027 A JP2007295027 A JP 2007295027A JP 2007295027 A JP2007295027 A JP 2007295027A JP 4971109 B2 JP4971109 B2 JP 4971109B2
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main body
layer sheet
outer packaging
packaging material
inner layer
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JP2009118986A (en
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明男 高橋
純 佐々木
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Kao Corp
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Kao Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/087—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using both a rotary sonotrode and a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Description

本発明は、吸収性コアを含む吸収性本体と該吸収性本体の非肌当接面側に接合された外包材とを備えた使い捨ておむつに関する。   The present invention relates to a disposable diaper including an absorbent main body including an absorbent core and an outer packaging material bonded to the non-skin contact surface side of the absorbent main body.

従来、図９に示すように、表面シート３２、裏面シート３３及び両シート３２，３３間に介在配置された液保持性の吸収性コア３４を含む縦長の吸収性本体３と、該吸収性本体３の非肌当接面側に接合された外包材２とを備え、該外包材２が、該吸収性本体３の長手方向両端縁３ａ，３ａそれぞれから本体長手方向に延出する長さを有している使い捨ておむつが知られている。外包材２は、通常、外層シート２１、内層シート２２及び両シート２１，２２間に配された複数本の弾性部材４２を含んで構成されており、該複数本の弾性部材４２それぞれは、その伸縮方向をおむつ幅方向に一致させておむつ長手方向に間欠的に配されている。外包材２は吸収性本体３側に折り返されており、この外包材２の折り返し部２Ａによって、吸収性本体３の長手方向端部における肌当接面側が被覆されており、これにより、おむつの着用中に吸収性コア３４が着用者の肌に直接触れる、あるいは吸収性コア３４から吸収性ポリマーが脱落する、等の不都合を回避している。   Conventionally, as shown in FIG. 9, a vertically long absorbent main body 3 including a top sheet 32, a back sheet 33, and a liquid-retaining absorbent core 34 disposed between both sheets 32 and 33, and the absorbent main body 3 and the outer packaging material 2 joined to the non-skin contact surface side, and the outer packaging material 2 has a length extending in the longitudinal direction of the main body from both longitudinal edges 3a, 3a of the absorbent main body 3. Disposable diapers are known. The outer packaging material 2 is usually configured to include an outer layer sheet 21, an inner layer sheet 22, and a plurality of elastic members 42 disposed between both sheets 21, 22. It is arranged intermittently in the longitudinal direction of the diaper, with the expansion / contraction direction matched to the diaper width direction. The outer packaging material 2 is folded back to the absorbent main body 3 side, and the skin contact surface side at the longitudinal end portion of the absorbent main body 3 is covered by the folded portion 2A of the outer packaging material 2, whereby the diaper Inconveniences such as the absorbent core 34 directly touching the wearer's skin during wearing or the absorbent polymer dropping off from the absorbent core 34 are avoided.

このような構成の従来の使い捨ておむつにおいては、図９に示すように、折り返し部２Ａの存在領域Ｈの略全域に接着剤７３が塗布され、折り返し部２Ａの構成部材間を強固に接合させていた。このため、従来の使い捨ておむつにおける折り返し部２Ａは、接着剤７３の影響により柔軟性に乏しく硬かった。折り返し部２Ａは、おむつのウエスト部を構成する部位であるため、折り返し部２Ａが硬いと、着用者の腰周りを中心に着用者に違和感を与え、良好な着用感が得られないという問題があった。
また、特に幼児用の使い捨ておむつにおいて、折り返し部２Ａが硬いと、ウエスト部の折れが生じるという問題があった。幼児は、成人に比して腹部が極端に突出した体型を有し且つ腹囲の変動が激しいため、特におむつ着用中の座位において、ウエスト開口部の開口周縁端（ウエスト部の先端）が突出した腹部の下に入り込み、該開口周縁端が腹部から下方向に圧迫され、これにより、ウエスト部の折れが生じる。 In the conventional disposable diaper having such a configuration, as shown in FIG. 9, an adhesive 73 is applied to substantially the entire region H of the folded portion 2A, and the constituent members of the folded portion 2A are firmly joined. It was. For this reason, the folding | returning part 2A in the conventional disposable diaper was hard to lack a softness | flexibility by the influence of the adhesive agent 73, and was hard. Since the folded part 2A is a part constituting the waist part of the diaper, if the folded part 2A is hard, there is a problem that the wearer feels uncomfortable around the waist of the wearer and a good wearing feeling cannot be obtained. there were.
Moreover, in the disposable diaper for infants in particular, there is a problem that if the folded portion 2A is hard, the waist portion is bent. Infants have a body shape in which the abdomen protrudes extremely compared to adults, and the abdominal circumference fluctuates significantly, so that the opening peripheral edge of the waist opening (tip of the waist) protrudes, especially in the sitting position while wearing a diaper It enters under the abdomen, and the peripheral edge of the opening is pressed downward from the abdomen, thereby causing the waist to bend.

特許文献１には、ウエスト部の風合いを改善することを目的として、ウエスト部を構成する不織布シートの折り返し部の存在領域に、接着剤を、おむつ長手方向に線状に且つおむつ幅方向に間欠的にストライプ状に塗布する技術が記載されている。
しかしながら、特許文献１に記載の前記技術は、ウエスト部の風合いをある程度は改善できるものの、充分とは言えず、また、上述したウエスト部の折れに関しては、おむつ長手方向に線状に塗布された接着剤により、折り返し部に、おむつ長手方向に延びる高剛性領域が生じるため、依然としてウエスト部が折れ易く、未解決のままであった。 In Patent Document 1, for the purpose of improving the texture of the waist part, an adhesive is linearly arranged in the longitudinal direction of the diaper and intermittent in the width direction of the diaper in the region where the non-woven sheet constituting the waist part exists. In particular, a technique for coating in stripes is described.
However, although the technique described in Patent Document 1 can improve the texture of the waist part to some extent, it cannot be said to be sufficient, and the above-described fold of the waist part was applied linearly in the diaper longitudinal direction. Since the adhesive has a high-rigidity region extending in the longitudinal direction of the diaper at the folded portion, the waist portion is still easily broken and remains unsolved.

実開平４−７１９２２号公報Japanese Utility Model Publication No. 4-71922

従って、本発明の目的は、ウエスト部の柔軟性及び風合いに優れ、ウエスト部の折れを生じ難い使い捨ておむつを提供することにある。   Therefore, the objective of this invention is providing the disposable diaper which is excellent in the softness | flexibility and texture of a waist part, and does not produce a fold of a waist part easily.

本発明は、吸収性コアを含む縦長の吸収性本体と該吸収性本体の非肌当接面側に接合された外包材とを備え、該外包材が、該吸収性本体の長手方向両端それぞれから外方に延出する長さを有している使い捨ておむつであって、前記外包材は、前記吸収性本体の長手方向両端から外方に延出する部分それぞれが、該吸収性本体の長手方向端縁より外方に位置し本体幅方向に延びる折曲線において、前記吸収性本体側に折り返されており、この外包材の折り返し部によって、該吸収性本体の長手方向両端部における肌当接面側が被覆されており、前記折り返し部の存在領域における相対向する外包材間に、本体幅方向に延びる複数の線状の接着剤塗布部が、本体長手方向に間欠的に配されており、該接着剤塗布部を介して、該相対向する外包材間及び該折り返し部と前記吸収性本体との間がそれぞれ接合されている使い捨ておむつを提供することにより前記目的を達成したものである。   The present invention comprises a vertically long absorbent main body including an absorbent core and an outer packaging material joined to the non-skin contact surface side of the absorbent main body, and the outer packaging material has both longitudinal ends of the absorbent main body. A disposable diaper having a length extending outward from the outer packaging material, wherein each of the portions extending outward from both longitudinal ends of the absorbent main body has a longitudinal length of the absorbent main body. In the folding line that is located outward from the edge in the direction and extends in the width direction of the main body, it is folded back to the absorbent main body side, and the skin contact at the both longitudinal ends of the absorbent main body by the folded portion of the outer packaging material A plurality of linear adhesive application portions extending in the width direction of the main body are intermittently disposed in the longitudinal direction of the main body between the outer packaging materials facing each other in the region where the folded portion is present, Between the opposing outer packaging materials through the adhesive application part Fine between the folded portion and the absorbent body is one that has achieved the above object by providing a disposable diaper are joined respectively.

本発明の使い捨ておむつによれば、ウエスト部の柔軟性及び風合いに優れ、幼児のような、腹部が極端に突出している者が着用した場合でもウエスト部の折れを生じ難い。   According to the disposable diaper of this invention, it is excellent in the softness | flexibility of a waist part, and a texture, and even when a person like the infant who the abdomen protrudes extremely wears, it is hard to produce a fold of a waist part.

以下、本発明の使い捨ておむつについて、その好ましい一実施形態であるパンツ型使い捨ておむつに基づき、図面を参照しながら説明する。
本実施形態のパンツ型使い捨ておむつ１は、図１〜図４に示すように、縦長の吸収性コア３４を含む縦長の吸収性本体３と、該吸収性本体３の非肌当接面側に接合された外包材２とを備え、外包材２は長手方向に腹側部Ａ、股下部Ｃ及び背側部Ｂに区分されており、外包材２における腹側部Ａ及び背側部Ｂの両側縁部同士が接合されて、一対のサイドシール部１１、ウエスト開口部１２及び一対のレッグ開口部１３が形成されているパンツ型使い捨ておむつである。 Hereinafter, the disposable diaper of this invention is demonstrated, referring drawings based on the pants type disposable diaper which is the preferable embodiment.
As shown in FIGS. 1 to 4, the pants-type disposable diaper 1 of the present embodiment has a vertically long absorbent main body 3 including a vertically long absorbent core 34, and a non-skin contact surface side of the absorbent main body 3. And the outer packaging material 2 is divided in the longitudinal direction into an abdominal side A, a crotch C, and a back side B. A pants-type disposable diaper in which a pair of side seal parts 11, a waist opening part 12, and a pair of leg opening parts 13 are formed by joining both side edges.

また、外包材２は、外層シート２１、内層シート２２及び両シート２１，２２間に配された複数本の弾性部材２３，２４，２５，２６を含んで構成されており、複数本の弾性部材２３，２４，２５，２６それぞれは、その伸縮方向を本体幅方向に一致させて本体長手方向に間欠的に配されている。外層シート２１はおむつ１の外面をなし、内層シート２２は外層シート２１の内面側に配されている。外包材２の腹側部Ａ及び背側部Ｂにおける胴回り部Ｄ及びウエスト部Ｆには、それぞれ、複合伸縮部４（図７参照）から形成された胴回りギャザーＧ１及びウエストギャザーＧ２が設けられている。   The outer packaging material 2 includes an outer layer sheet 21, an inner layer sheet 22, and a plurality of elastic members 23, 24, 25, and 26 disposed between both sheets 21 and 22. Each of 23, 24, 25, and 26 is intermittently arranged in the longitudinal direction of the main body with its expansion / contraction direction coincided with the width direction of the main body. The outer layer sheet 21 forms the outer surface of the diaper 1, and the inner layer sheet 22 is disposed on the inner surface side of the outer layer sheet 21. The waistline portion D and the waist portion F in the ventral side portion A and the back side portion B of the outer packaging material 2 are respectively provided with a waistline gather G1 and a waist gather G2 formed from the composite stretchable portion 4 (see FIG. 7). Yes.

詳述すると、本実施形態の使い捨ておむつ１は、図１〜図４に示すように、液透過性の表面シート３２、液不透過性又は撥水性の裏面シート３３及び両シート３２，３３間に介在配置された液保持性の吸収性コア３４を有する実質的に縦長の吸収性本体３と、吸収性本体３の裏面シート３３側（非肌当接面側）に接合された外包材２とを備えている。吸収性本体３は、外包材２の腹側部Ａから背側部Ｂに跨って配され、吸収性本体３の長手方向端部は、外包材２の長手方向端部よりも長手方向内方に後退している。吸収性本体３は、接着剤、ヒートシール、超音波シール等による本体接合部１５によって、外包材２を構成する内層シート２２の肌当接面に接合されている。   More specifically, the disposable diaper 1 of the present embodiment includes a liquid-permeable top sheet 32, a liquid-impermeable or water-repellent back sheet 33, and both sheets 32, 33 as shown in FIGS. A substantially vertically long absorbent main body 3 having a liquid-retaining absorbent core 34 disposed therebetween, and an outer packaging material 2 joined to the back sheet 33 side (non-skin contact surface side) of the absorbent main body 3 It has. The absorbent main body 3 is arranged across the ventral side A to the back side B of the outer packaging material 2, and the longitudinal end portion of the absorbent main body 3 is longer inward in the longitudinal direction than the longitudinal end portion of the outer packaging material 2. Have retreated. The absorptive main body 3 is bonded to the skin contact surface of the inner layer sheet 22 constituting the outer packaging material 2 by a main body bonding portion 15 such as an adhesive, a heat seal, and an ultrasonic seal.

尚、本明細書において、「長手方向」は、使い捨ておむつ又は各種部材の長辺に沿う方向であり、「幅方向」は、長手方向と直交する方向である。「本体長手方向」は、縦長の吸収性本体３の長辺に沿う方向（図２では上下方向）であり、「本体幅方向」は、本体長手方向と直交する方向（図２では左右方向）である。
また、「肌当接面」は、おむつ着用時に着用者の肌側に向けられる面であり、「非肌当接面」は、おむつ着用時に下着側（着用者の肌側とは反対側）に向けられる面である。 In the present specification, the “longitudinal direction” is a direction along the long side of the disposable diaper or various members, and the “width direction” is a direction orthogonal to the longitudinal direction. The “main body longitudinal direction” is a direction along the long side of the vertically long absorbent main body 3 (vertical direction in FIG. 2), and the “main body width direction” is a direction orthogonal to the main body longitudinal direction (left and right direction in FIG. 2). It is.
The “skin contact surface” is the surface that faces the wearer's skin when wearing a diaper, and the “non-skin contact surface” is the underwear side (the side opposite to the wearer's skin) when wearing a diaper. It is the surface that is directed to.

外包材２は、その両側縁が、長手方向中央部において内方に括れた砂時計型の形状を有しており、おむつの輪郭を画成している。外包材２は、その長手方向に、着用者の腹側に配される腹側部Ａ、背側に配される背側部Ｂ及びその間に位置する股下部Ｃに区分される。腹側部Ａ及び背側部Ｂは、それぞれ外包材２の長手方向前後部に相当し、股下部Ｃは外包材２の長手方向中央部に相当する。外包材２は、その腹側部Ａの両側縁部と背側部Ｂの両側縁部とが互いに接合され、使い捨ておむつ１にはウエスト開口部１２及び一対のレッグ開口部１３が形成されている。この接合によって、使い捨ておむつ１の左右両側縁部には一対のサイドシール部１１，１１が形成され、パンツ型を形成している。この接合には、ヒートシール、高周波シール、超音波シール等が用いられる。   The outer wrapping material 2 has an hourglass shape in which both side edges are bound inward in the central portion in the longitudinal direction, and defines the outline of the diaper. The outer packaging material 2 is divided in the longitudinal direction into an abdominal side A disposed on the abdomen side of the wearer, a back side B disposed on the back side, and a crotch C positioned therebetween. The ventral side A and the back side B correspond to the longitudinal front and rear portions of the outer packaging material 2, respectively, and the crotch portion C corresponds to the longitudinal central portion of the outer packaging material 2. As for the outer packaging material 2, the both-sides edge part of the ventral | abdominal side part A and the both-sides edge part of the back side part B are mutually joined, and the waist opening part 12 and a pair of leg opening part 13 are formed in the disposable diaper 1. . By this joining, a pair of side seal parts 11 and 11 are formed on the left and right side edges of the disposable diaper 1 to form a pant-type. For this joining, heat sealing, high frequency sealing, ultrasonic sealing or the like is used.

表面シート３２、裏面シート３３及び吸収性コア３４は、それぞれ平面視において矩形形状を有し、一体化されて、縦長の吸収性本体３を形成している。吸収性本体３の長手方向の全長は、吸収性コア３４の長手方向の全長に略一致しており、吸収性本体３の長手方向両端３ａ，３ａは、吸収性コア３４の長手方向両端（図示せず）に略一致している。表面シート３２、裏面シート３３及び吸収性コア３４としては、それぞれ、従来からこの種のおむつに用いられているものと同様のものを用いることができる。例えば、吸収性コア３４としては、吸収性ポリマーの粒子及び繊維材料から構成され、ティッシュペーパ（図示せず）によって被覆されているものを用いることができる。本実施形態における吸収性コア３４は、砂時計型の中央吸収体と、該中央吸収体の両側方に対称的に設けられた一対のサイド吸収体とを具備し、該中央吸収体と該一対のサイド吸収体との間それぞれに、刳り貫かれた形状の切離部が形成されている。但し、吸収性コア３４の平面視における形状は、これに制限されず、例えば、矩形形状、砂時計形状等、任意に設定可能である。   The top sheet 32, the back sheet 33, and the absorbent core 34 have a rectangular shape in plan view, and are integrated to form a vertically long absorbent main body 3. The total length in the longitudinal direction of the absorbent main body 3 substantially matches the total length in the longitudinal direction of the absorbent core 34, and the longitudinal ends 3 a, 3 a of the absorbent main body 3 are both longitudinal ends of the absorbent core 34 (see FIG. (Not shown). As the surface sheet 32, the back surface sheet 33, and the absorptive core 34, the thing similar to what was conventionally used for this kind of diaper can be used, respectively. For example, the absorbent core 34 may be made of absorbent polymer particles and a fiber material and covered with tissue paper (not shown). The absorbent core 34 in the present embodiment includes an hourglass-shaped central absorber and a pair of side absorbers provided symmetrically on both sides of the central absorber, and the central absorber and the pair of side absorbers. A cut-out portion having a hollow shape is formed between each side absorber. However, the shape of the absorbent core 34 in plan view is not limited to this, and can be arbitrarily set, for example, a rectangular shape, an hourglass shape, or the like.

吸収性本体３の長手方向両側部には、図２〜図４に示すように、液抵抗性又は撥水性で且つ通気性の素材から構成された側方カフス３５、３５が設けられている。各側方カフス３５の自由端部近傍には、側方カフス弾性部材３６が伸長状態で配されている。これにより、使い捨ておむつ１を着用する際に、側方カフス弾性部材３６が収縮することによって側方カフス３５が起立して、吸収性本体３の幅方向への液の流出が阻止される。側方カフス３５の形成用の側方カフス形成シート３７は、図３及び図４に示すように、おむつの展開状態において、吸収性本体３の幅方向外側の所定幅の部分３７Ａが、裏面シート３３の肌当接面側に巻き下げられ、吸収性コア３４と裏面シート３３との間に固定されている。   As shown in FIGS. 2 to 4, side cuffs 35 and 35 made of a liquid-resistant or water-repellent and breathable material are provided on both sides in the longitudinal direction of the absorbent main body 3. In the vicinity of the free end of each side cuff 35, a side cuff elastic member 36 is disposed in an expanded state. Accordingly, when the disposable diaper 1 is worn, the side cuff elastic member 36 contracts, whereby the side cuff 35 is raised, and the outflow of the liquid in the width direction of the absorbent main body 3 is prevented. As shown in FIGS. 3 and 4, the side cuff forming sheet 37 for forming the side cuff 35 has a predetermined width portion 37 </ b> A on the outer side in the width direction of the absorbent main body 3 in the developed state of the diaper. It is wound down to the skin contact surface side of 33 and is fixed between the absorbent core 34 and the back sheet 33.

外包材２は、図５及び図６に示すように、吸収性本体３の長手方向両端３ａ，３ａそれぞれから本体長手方向の外方に延出する長さを有している。本実施形態においては、外包材２を構成する外層シート２１及び内層シート２２の何れも、吸収性本体３の長手方向両端３ａ，３ａそれぞれから本体長手方向の外方に延出する長さを有しており、且つ外層シート２１の方が内層シート２２よりも延出する長さが長くなっている。   As shown in FIGS. 5 and 6, the outer packaging material 2 has a length that extends outward in the longitudinal direction of the main body from each of the longitudinal ends 3 a and 3 a of the absorbent main body 3. In the present embodiment, both the outer layer sheet 21 and the inner layer sheet 22 constituting the outer packaging material 2 have a length that extends outwardly in the longitudinal direction of the main body 3 from both longitudinal ends 3a, 3a. In addition, the length of the outer layer sheet 21 extending longer than that of the inner layer sheet 22 is longer.

外包材２は、吸収性本体３の長手方向両端３ａ，３ａから外方に延出する部分（図５中、符号Ｌで示す部分）それぞれが、該吸収性本体３の長手方向端縁〔吸収性本体３の長手方向一端（他端）３ａを含むその近傍〕より本体長手方向の外方に位置し本体幅方向に延びる折曲線３０において、吸収性本体３側に折り返されており、この外包材２の折り返し部２Ａ，２Ａによって、図２及び図６に示すように、吸収性本体３の長手方向両端部における肌当接面側が被覆されている。
折り返し部２Ａの存在領域Ｈは、図２に示すように、ウエスト部Ｆの全域及び胴回り部Ｄの一部に亘っている。折曲線３０は、ウエスト開口部周縁端１２ａに略一致し、折曲線３０を含む外包材２の折曲部２Ｂは、ウエスト開口部１２の開口周縁部を構成する。 Each of the outer packaging materials 2 has a longitudinal end portion [absorption indicated by a symbol L in FIG. 5] that extends outward from both longitudinal ends 3a, 3a of the absorbent main body 3. In the fold line 30 that is located outward in the longitudinal direction of the main body and extends in the width direction of the main body from its one end (the other end) 3a in the longitudinal direction of the absorbent main body 3), it is folded back to the absorbent main body 3 side. As shown in FIG. 2 and FIG. 6, the skin contact surface side at both longitudinal ends of the absorbent main body 3 is covered with the folded portions 2 </ b> A and 2 </ b> A of the material 2.
As shown in FIG. 2, the region H where the folded portion 2A exists extends over the entire area of the waist portion F and a part of the waistline portion D. The folding line 30 substantially coincides with the peripheral edge 12 a of the waist opening, and the bent part 2 </ b> B of the outer packaging material 2 including the folding line 30 constitutes the opening peripheral part of the waist opening 12.

本実施形態においては、折り返し部２Ａは、図６に示すように、外層シート２１の折り返し部２１Ａと内層シート２２の折り返し部２２Ａとから構成され、吸収性本体３の長手方向両端部における肌当接面側は、外層シート２１の折り返し部２１Ａのみによって被覆されている。内層シート２２の折り返し部２２Ａは、吸収性本体３の長手方向一端（他端）３ａよりも本体長手方向外方に位置している。
このように、吸収性本体３の長手方向両端部における肌当接面側が、外包材２の折り返し部２Ａ（本実施形態では外層シート２１の折り返し部２１Ａ）によって被覆されていることにより、吸収性本体３の長手方向両端部が着用者に直接接触することを防止し、且つ吸収性本体３の長手方向両端部からの吸収性コア３４の吸収性ポリマーの漏れを防止することができる。 In the present embodiment, the folded portion 2A is composed of a folded portion 21A of the outer layer sheet 21 and a folded portion 22A of the inner layer sheet 22, as shown in FIG. The contact surface side is covered only by the folded portion 21 </ b> A of the outer layer sheet 21. The folded portion 22A of the inner layer sheet 22 is located on the outer side in the longitudinal direction of the main body with respect to the longitudinal direction one end (the other end) 3a of the absorbent main body 3.
Thus, the skin contact surface side at both longitudinal ends of the absorbent main body 3 is covered with the folded portion 2A of the outer packaging material 2 (in this embodiment, the folded portion 21A of the outer layer sheet 21), thereby absorbing the skin. It can prevent that the longitudinal direction both ends of the main body 3 contact a wearer directly, and can prevent the absorption polymer of the absorptive core 34 from the longitudinal direction both ends of the absorptive main body 3 from leaking.

折曲線３０は、図５に示すように外包材２（外層シート２１及び内層シート２２）を折り返さずに本体長手方向に延ばした状態において、外層シート２１と内層シート２２との間に配された複数本の弾性部材２３，２４，２５，２６のうち、最も本体長手方向外方に位置する弾性部材２４（ウエスト弾性部材２４）よりも本体長手方向外方で、且つ外包材２を構成するシートのうち、最も本体長手方向に沿った長さが短いシート（内層シート２２）の本体長手方向一端（他端）よりも本体長手方向内方に位置している。折曲線３０は、吸収性本体３の長手方向一端（他端）３ａから本体長手方向外方に、３０〜５０ｍｍ、特に３５〜４５ｍｍ離間した位置にあることが好ましい。   The folding line 30 is arranged between the outer layer sheet 21 and the inner layer sheet 22 in a state where the outer packaging material 2 (the outer layer sheet 21 and the inner layer sheet 22) extends in the longitudinal direction of the main body without being folded back as shown in FIG. Among the plurality of elastic members 23, 24, 25, 26, a sheet that constitutes the outer packaging material 2 on the outer side in the main body longitudinal direction than the elastic member 24 (waist elastic member 24) located most outward in the main body longitudinal direction Among them, the sheet (inner layer sheet 22) having the shortest length along the longitudinal direction of the main body is positioned inward in the longitudinal direction of the main body from one end (the other end) in the main body longitudinal direction. The folding line 30 is preferably located 30 to 50 mm, particularly 35 to 45 mm away from the longitudinal direction one end (the other end) 3 a of the absorbent body 3 outward in the longitudinal direction of the body.

折り返し部２Ａの存在領域Ｈにおける相対向する外包材間（折り返し部２Ａと、外包材２における該折り返し部２Ａと相対向する部位との間）には、図５及び図６に示すように、本体幅方向に延びる複数の線状の接着剤塗布部７０，７１が、本体長手方向に間欠的に配されており、該接着剤塗布部７０，７１を介して、該相対向する外包材間及び該折り返し部２Ａと吸収性本体３との間がそれぞれ接合されている。接着剤塗布部７０，７１は、ホットメルト型接着剤等の接着剤が所定箇所に塗布されることにより形成されており、本実施形態においては、平面視において直線状である。隣り合う接着剤塗布部間（複数の接着剤塗布部７０の間、複数の接着剤塗布部７１の間、及び接着剤塗布部７０と接着剤塗布部７１との間）は、接着剤が塗布されていない接着剤非塗布部となっている。
このように、外包材２の折り返し部２Ａを固定するための接着剤塗布部として、本体幅方向に延びる複数の線状の接着剤塗布部７０，７１を採用し、且つ該接着剤塗布部７０，７１を本体長手方向に間欠的に配することにより、図９に示すように折り返し部２Ａの存在領域Ｈの略全域に接着剤７３を塗布した場合に比して、ウエスト部Ｆの柔軟性及び風合いが向上し、着用感が良好なおむつが得られる。 As shown in FIGS. 5 and 6, between the opposing outer packaging materials in the region H where the folded portion 2A exists (between the folded portion 2A and the portion facing the folded portion 2A in the outer packaging material 2), as shown in FIGS. A plurality of linear adhesive application portions 70 and 71 extending in the width direction of the main body are intermittently arranged in the longitudinal direction of the main body, and between the opposing outer packaging materials via the adhesive application portions 70 and 71. The folded portion 2A and the absorbent main body 3 are joined to each other. The adhesive application portions 70 and 71 are formed by applying an adhesive such as a hot-melt adhesive at a predetermined location. In the present embodiment, the adhesive application portions 70 and 71 are linear in a plan view. Adhesive is applied between adjacent adhesive application parts (between a plurality of adhesive application parts 70, between a plurality of adhesive application parts 71, and between the adhesive application part 70 and the adhesive application part 71). It is an adhesive non-application part which is not done.
As described above, a plurality of linear adhesive application portions 70 and 71 extending in the width direction of the main body are employed as the adhesive application portion for fixing the folded portion 2A of the outer packaging material 2, and the adhesive application portion 70 is used. , 71 are intermittently arranged in the longitudinal direction of the main body, so that the flexibility of the waist portion F is greater than when the adhesive 73 is applied to substantially the entire region H of the folded portion 2A as shown in FIG. And a texture improves and a diaper with a favorable feeling of wear is obtained.

また、特に、おむつ１の着用者が、幼児のように、腹部が極端に突出した体型を有している場合には、ウエスト開口部周縁端１２ａが、突出した腹部の下に入り込み、該腹部から下方向に圧迫される傾向があり、従来のおむつにおいては、この圧迫によりウエスト部Ｆがおむつの外面側に折れ曲がるという問題があった。
これに対し、本実施形態のように、ウエスト部Ｆにおける接着剤塗布パターンとして、本体幅方向に延びる複数の線状の接着剤塗布部７０，７１を本体長手方向に間欠的に配してなるパターンを採用することにより、突出した腹部によってウエスト開口部周縁端１２ａが下方向に圧迫されても、ウエスト部Ｆには、接着剤が塗布されておらずシート（外包材２）が本来有している柔軟性が損なわれていない、前記接着剤非塗布部が、圧迫方向に間欠的に配されているため、圧迫力を緩和させることができ、これにより、ウエスト部Ｆの折れを防止することができる。
一方、ウエスト部Ｆにおける接着剤塗布パターンが、特許文献１に記載されているようなパターン、即ち、本体長手方向に延びる複数の線状の接着剤塗布部を本体幅方向に間欠的に配してなるパターンである場合は、ウエスト部Ｆに、本体長手方向に延びる接着剤塗布部に対応する高剛性領域が生じるため、ウエスト部Ｆに掛かる上からの圧迫力を充分に緩和させることはできず、ウエスト部Ｆが折れ曲がりやすい。 In particular, when the wearer of the diaper 1 has a body shape in which the abdomen protrudes extremely like an infant, the waist opening peripheral edge 12a enters under the protruding abdomen, and the abdomen The conventional diaper has a problem that the waist portion F bends to the outer surface side of the diaper due to the compression.
On the other hand, as in this embodiment, as the adhesive application pattern in the waist portion F, a plurality of linear adhesive application portions 70 and 71 extending in the main body width direction are intermittently arranged in the main body longitudinal direction. By adopting the pattern, even if the waist opening peripheral edge 12a is pressed downward by the protruded abdomen, the adhesive is not applied to the waist F and the sheet (outer packaging material 2) originally has. The adhesive non-applied part, which is not damaged, is intermittently arranged in the compression direction, so that the compression force can be relaxed, thereby preventing the waist part F from being broken. be able to.
On the other hand, the adhesive application pattern in the waist part F is a pattern as described in Patent Document 1, that is, a plurality of linear adhesive application parts extending in the longitudinal direction of the main body are intermittently arranged in the main body width direction. In the case of the pattern, a high-rigidity region corresponding to the adhesive application portion extending in the longitudinal direction of the main body is generated in the waist portion F. Therefore, it is possible to sufficiently relieve the compression force applied to the waist portion F from above. The waist part F is easy to bend.

柔軟性及び風合いの更なる向上の観点から、折曲線３０を含む外包材２の折曲部２Ｂ、即ち、ウエスト開口部周縁端１２ａを含むウエスト開口部１２の開口周縁部（ウエスト部Ｆの先端部）は、４層以上の不織布の積層体を含んで構成されていることが好ましい。
本実施形態においては、後述するように、外包材２を構成する外層シート２１及び内層シート２２は何れも不織布からなり、また上述したように、これら２枚のシート２１，２２が折曲線３０において吸収性本体３側に折り返されることによって、折曲部２Ｂ及びこれに連なる折り返し部２Ａが形成されているため、折曲部２Ｂは、図６に示すように、４層の不織布の積層体を含んで構成されており、斯かる構成により、ウエスト開口部１２の開口周縁部の柔軟性及び風合いの更なる向上が図られている。
上記効果を確実に奏させる観点から、ウエスト開口部周縁端１２ａから下方に（折曲線３０から本体長手方向内方に）１０ｍｍ以内、特に５ｍｍ以内の領域は、４層以上の不織布の積層体を含んで構成されていることが好ましい。 From the viewpoint of further improvement in flexibility and texture, the bent portion 2B of the outer packaging material 2 including the folding line 30, that is, the opening peripheral portion of the waist opening 12 including the waist opening peripheral edge 12a (the tip of the waist portion F) Part) is preferably configured to include a laminate of four or more layers of nonwoven fabric.
In the present embodiment, as will be described later, the outer layer sheet 21 and the inner layer sheet 22 constituting the outer packaging material 2 are both made of non-woven fabric, and as described above, these two sheets 21 and 22 are in the folding line 30. Since the folded part 2B and the folded part 2A connected to the folded part 2B are formed by folding back to the absorbent main body 3 side, the folded part 2B includes a laminate of four layers of nonwoven fabric as shown in FIG. With this configuration, the flexibility and texture of the opening peripheral edge of the waist opening 12 are further improved.
From the viewpoint of surely achieving the above effect, a region of 10 mm or less, particularly 5 mm or less downward from the waist opening peripheral edge 12a (inward from the folding line 30 in the main body longitudinal direction) is a laminate of four or more layers of nonwoven fabric. It is preferable that it is comprised.

上述したように、折り返し部２Ａの存在領域Ｈにおける相対向する外包材間に配されている複数の線状の接着剤塗布部は、吸収性本体３の長手方向一端（他端）３ａを境界として、本体長手方向の外方に位置する接着剤塗布部７０と、内方に位置する接着剤塗布部７１とを含んで構成されている。
図６に示すように、接着剤塗布部７０は、折り返し部２Ａの存在領域Ｈにおける相対向する外包材間を接合しており、接着剤塗布部７１は、折り返し部２Ａと吸収性本体３の長手方向両端部における肌当接面側との間を接合している。 As described above, the plurality of linear adhesive application portions arranged between the facing outer packaging materials in the region H where the folded portion 2A exists are bounded by one end (the other end) 3a in the longitudinal direction of the absorbent main body 3. As shown, the adhesive application part 70 located outward in the longitudinal direction of the main body and the adhesive application part 71 located inward are included.
As shown in FIG. 6, the adhesive application part 70 joins the outer packaging materials facing each other in the region H where the folded part 2 </ b> A exists, and the adhesive application part 71 is formed between the folded part 2 </ b> A and the absorbent main body 3. The skin contact surface side at both ends in the longitudinal direction is joined.

接着剤塗布部７０，７１は、何れも複数本（図５及び図６ではそれぞれ３本）配されている。接着剤塗布部７０，７１それぞれの本体幅方向に沿った長さは、外包材２の本体幅方向に沿った長さ（外包材２の最大幅）に対して、好ましくは７０〜１００％、更に好ましくは８０〜１００％である。本実施形態においては、この割合は１００％であり、接着剤塗布部７０，７１の何れも、外包材２の最大幅を有する部分の全幅に亘って連続的に配されている。   A plurality of adhesive application sections 70 and 71 are provided (three in each of FIGS. 5 and 6). The length along the main body width direction of each of the adhesive application portions 70 and 71 is preferably 70 to 100% with respect to the length along the main body width direction of the outer packaging material 2 (maximum width of the outer packaging material 2). More preferably, it is 80 to 100%. In this embodiment, this ratio is 100%, and all of the adhesive application portions 70 and 71 are continuously arranged over the entire width of the portion having the maximum width of the outer packaging material 2.

接着剤塗布部７０の幅（本体長手方向に沿った長さ）は、好ましくは１〜１０ｍｍ、更に好ましくは２〜６ｍｍである。
接着剤塗布部７１の幅は、好ましくは１〜１０ｍｍ、更に好ましくは２〜６ｍｍである。
接着剤塗布部７０の幅と接着剤塗布部７１の幅とは、同一でもよく、異なっていても良い。 The width (length along the longitudinal direction of the main body) of the adhesive application part 70 is preferably 1 to 10 mm, and more preferably 2 to 6 mm.
The width | variety of the adhesive application part 71 becomes like this. Preferably it is 1-10 mm, More preferably, it is 2-6 mm.
The width of the adhesive application part 70 and the width of the adhesive application part 71 may be the same or different.

接着剤塗布部７０の幅と接着剤塗布部７１の幅とが異なる場合、接着剤塗布部７１の方が、接着剤塗布部７０よりも幅広であることが、吸収性本体３の長手方向端部を確実に被覆するという点で好ましい。この場合、接着剤塗布部７０の幅Ｗ１と接着剤塗布部７１の幅Ｗ２との比（Ｗ１／Ｗ２）は、好ましくは０．２５〜１、更に好ましくは０．４〜１である。   When the width of the adhesive application part 70 and the width of the adhesive application part 71 are different, the adhesive application part 71 is wider than the adhesive application part 70 so that the longitudinal end of the absorbent body 3 This is preferable in that the portion is reliably covered. In this case, the ratio (W1 / W2) of the width W1 of the adhesive application part 70 and the width W2 of the adhesive application part 71 is preferably 0.25 to 1, and more preferably 0.4 to 1.

複数の接着剤塗布部７０の配置ピッチＰ４は、好ましくは１〜１０ｍｍ、更に好ましくは２〜５ｍｍである。
複数の接着剤塗布部７１の配置ピッチＰ５は、好ましくは１〜６ｍｍ、更に好ましくは１〜４ｍｍである。
隣り合う接着剤塗布部７０と接着剤塗布部７１との間の間隔Ｐ６は、好ましくは３〜１５ｍｍ、更に好ましくは５〜１０ｍｍである。
前記Ｐ４、Ｐ５、Ｐ６は、全て同じ値でも良く、一部が同じ値でも良く、全て異なる値でも良い。 The arrangement pitch P4 of the plurality of adhesive application portions 70 is preferably 1 to 10 mm, more preferably 2 to 5 mm.
The arrangement pitch P5 of the plurality of adhesive application portions 71 is preferably 1 to 6 mm, and more preferably 1 to 4 mm.
The interval P6 between the adjacent adhesive application part 70 and the adhesive application part 71 is preferably 3 to 15 mm, more preferably 5 to 10 mm.
P4, P5, and P6 may all be the same value, some may be the same value, or all may be different values.

本実施形態においては、折曲線３０を含む外包材２の折曲部２Ｂに接着剤が塗布されていない。即ち、図６に示すように、ウエスト開口部周縁端１２ａを含むウエスト開口部１２の開口周縁部（ウエスト部Ｆの先端部）には、接着剤が実質的に塗布されていない。ここで、「接着剤が実質的に塗布されていない」とは、接着剤が全く塗布されていない場合のみならず、少量の接着剤が塗布されている場合（接着剤塗布量が好ましくは１ｇ／ｍ2以下の場合）を含む。斯かる構成により、ウエスト部Ｆの先端部の柔軟性及び風合いがより一層高まり、おむつの着用感の更なる向上が図られると共に、おむつを履かせる母親が感じる感触も向上させることができる。
上記効果を確実に奏させる観点から、図５に示すように外包材２（外層シート２１及び内層シート２２）を折り返さずに本体長手方向に延ばした状態において、折曲線３０から本体長手方向の内方及び外方（図５では上下方向）それぞれに１０ｍｍ以内、特に５ｍｍ以内の領域には、接着剤を実質的に塗布しないことが好ましい。 In the present embodiment, no adhesive is applied to the bent portion 2 </ b> B of the outer packaging material 2 including the folding line 30. That is, as shown in FIG. 6, the adhesive is not substantially applied to the opening peripheral portion (the front end portion of the waist portion F) of the waist opening portion 12 including the waist opening peripheral edge 12 a. Here, “substantially no adhesive is applied” means not only when no adhesive is applied, but also when a small amount of adhesive is applied (adhesive application amount is preferably 1 g). / M 2 or less). With such a configuration, the flexibility and texture of the front end portion of the waist portion F are further increased, and the feeling of wearing the diaper can be further improved, and the feeling felt by the mother wearing the diaper can also be improved.
From the viewpoint of ensuring the above effects, the outer packaging material 2 (the outer layer sheet 21 and the inner layer sheet 22) extends in the longitudinal direction of the main body without being folded as shown in FIG. It is preferable that the adhesive is not substantially applied to a region within 10 mm, particularly within 5 mm in each of the outer side and the outer side (vertical direction in FIG. 5).

また、本実施形態においては、図６に示すように、折り返し部２Ａの先端部２Ａａ（本実施形態では、外層シート２１の折り返し部２１Ａの先端部２１Ａａ）に接着剤が実質的に塗布されていない。ここで、「接着剤が実質的に塗布されていない」とは、接着剤が全く塗布されていない場合のみならず、少量の接着剤が塗布されている場合（接着剤塗布量が好ましくは１ｇ／ｍ2以下の場合）を含む。斯かる構成により、折り返し部２Ａの先端部２Ａａが接着剤により硬くなることがなく、着用感を更に向上することができる。
上記効果を確実に奏させる観点から、外包材２における折り返し部２Ａの先端から本体長手方向に２０ｍｍ以内、特に１０ｍｍ以内の領域には、接着剤を実質的に塗布しないことが好ましい。 In the present embodiment, as shown in FIG. 6, the adhesive is substantially applied to the leading end 2 </ b> Aa of the folded portion 2 </ b> A (in this embodiment, the leading end 21 </ b> Aa of the folded portion 21 </ b> A of the outer layer sheet 21). Absent. Here, “substantially no adhesive is applied” means not only when no adhesive is applied, but also when a small amount of adhesive is applied (adhesive application amount is preferably 1 g). / M 2 or less). With such a configuration, the tip portion 2Aa of the folded portion 2A is not hardened by the adhesive, and the wearing feeling can be further improved.
From the viewpoint of ensuring the above effects, it is preferable that the adhesive is not substantially applied to a region within 20 mm, particularly within 10 mm, in the longitudinal direction of the main body from the tip of the folded portion 2A of the outer packaging material 2.

折り返し部２Ａの存在領域Ｈにおける接着剤の好ましい塗布形態（接着剤塗布部７０，７１の形態）としては、例えば、下記の接着剤塗布形態が挙げられる。   Examples of a preferable application form of the adhesive in the region H where the folded portion 2A exists (forms of the adhesive application parts 70 and 71) include the following adhesive application forms.

接着剤塗布形態：複数の接着剤塗布部７０，７１はそれぞれ幅が同じであり、且つ吸収性本体３の長手方向一端（他端）３ａより本体長手方向の外方に位置する複数の接着剤塗布部７０の配置ピッチＰ４が、該長手方向一端（他端）３ａより本体長手方向の内方に位置する複数の接着剤塗布部７１の配置ピッチＰ５よりも大きい。
前記接着剤塗布形態の採用により、上述したウエスト部Ｆの折れ防止効果を損なうことなく、折り返し部２Ａに本来の役割（吸収性コア３４がおむつ着用者の肌に直接触れることの防止、及び吸収性ポリマーの吸収性コア３４からの脱落防止）を果たさせることが可能となる。また、後述する複合伸縮部４の襞４３の成型性を一層良好に保つことができる。
前記接着剤塗布形態において、配置ピッチＰ４と配置ピッチＰ５との比（Ｐ４／Ｐ５）は、好ましくは１〜５、更に好ましくは１〜３である。 Adhesive application mode: The plurality of adhesive application portions 70 and 71 have the same width, and a plurality of adhesives positioned outward in the longitudinal direction of the main body from one longitudinal end (the other end) 3a of the absorbent main body 3 The arrangement pitch P4 of the application part 70 is larger than the arrangement pitch P5 of the plurality of adhesive application parts 71 located inward in the longitudinal direction of the main body from the one end (other end) 3a in the longitudinal direction.
By adopting the adhesive application mode, the original role of the folded portion 2A (prevention and absorption of the absorbent core 34 directly against the diaper wearer's skin is obtained without impairing the above-described folding prevention effect of the waist F. It is possible to prevent the release of the functional polymer from the absorbent core 34. Moreover, the moldability of the collar 43 of the composite elastic part 4 to be described later can be kept better.
In the adhesive application mode, the ratio (P4 / P5) between the arrangement pitch P4 and the arrangement pitch P5 is preferably 1 to 5, and more preferably 1 to 3.

少なくとも折り返し部２Ａの存在領域Ｈの近傍においては、外包材２の幅方向両端部（本体幅方向の両端部）２ｂ，２ｂを除き、外層シート２１と内層シート２２との間における隣り合う弾性部材間（複数の弾性部材２３の間）に、接着剤が実質的に塗布されていないことが好ましい。ここで、「折り返し部の存在領域の近傍」とは、折り返し部２Ａの先端部２Ａａから本体長手方向の内方に３０ｍｍ以内の領域である。また、「接着剤が実質的に塗布されていない」とは、接着剤が全く塗布されていない場合のみならず、少量の接着剤が塗布されている場合（接着剤塗布量が好ましくは１ｇ／ｍ2以下の場合）を含む。
斯かる領域における外層シート２１と内層シート２２との間の隣り合う弾性部材間に接着剤が実質的に塗布されていないことにより、ウエスト部Ｆの柔軟性及び風合いの一層の向上が図られ、ウエスト部Ｆの折れをより効果的に防止することができる。 At least in the vicinity of the region H where the folded portion 2A exists, the elastic members adjacent to each other between the outer layer sheet 21 and the inner layer sheet 22 except for both end portions in the width direction (both end portions in the body width direction) 2b, 2b of the outer packaging material 2. It is preferable that the adhesive is not substantially applied between the gaps (between the plurality of elastic members 23). Here, “in the vicinity of the region where the folded portion is present” is a region within 30 mm from the front end 2Aa of the folded portion 2A in the longitudinal direction of the main body. Further, “substantially no adhesive is applied” means not only when no adhesive is applied, but also when a small amount of adhesive is applied (adhesive application amount is preferably 1 g / m 2 or less).
Since the adhesive is not substantially applied between the elastic members adjacent to each other between the outer layer sheet 21 and the inner layer sheet 22 in such a region, the flexibility of the waist portion F and the texture can be further improved. The bending of the waist part F can be prevented more effectively.

上述したように、折り返し部２Ａの存在領域Ｈの近傍における外包材２の幅方向両端部２ｂ，２ｂにおいては、外層シート２１と内層シート２２との間における隣り合う弾性部材間に、接着剤が実質的に塗布されており、これにより所定幅の塗布部（図示せず）が形成されている。この塗布部の幅（塗布部の本体幅方向に沿った長さ）は、好ましくは５〜１５ｍｍである。また、本実施形態においては、この塗布部は、折り返し部２Ａの存在領域Ｈの近傍のみならず、該存在領域Ｈにも形成されており、胴回り部Ｄ及びウエスト部Ｆに亘って形成されている。   As described above, the adhesive is between the elastic members adjacent to each other between the outer layer sheet 21 and the inner layer sheet 22 at both ends 2b and 2b in the width direction of the outer packaging material 2 in the vicinity of the region H where the folded portion 2A exists. It is substantially applied, thereby forming an application part (not shown) having a predetermined width. The width of the application part (length along the main body width direction of the application part) is preferably 5 to 15 mm. Further, in the present embodiment, the application portion is formed not only in the vicinity of the existence region H of the folded portion 2A but also in the existence region H, and is formed over the waistline portion D and the waist portion F. Yes.

また、本実施形態における折り返し部２Ａの存在領域Ｈにおいては、吸収性本体３の存在領域（吸収性本体３が配置されている領域）及び前記外包材２の幅方向両端部２ｂ，２ｂを除き、外層シート２１と内層シート２２との間における隣り合う弾性部材間（複数の弾性部材２３の間、複数の弾性部材２４の間、及び弾性部材２３と弾性部材２４との間）に、接着剤が実質的に塗布されていない。ここで、「接着剤が実質的に塗布されていない」とは、接着剤が全く塗布されていない場合のみならず、少量の接着剤が塗布されている場合（接着剤塗布量が好ましくは１ｇ／ｍ2以下の場合）を含む。
斯かる領域における外層シート２１と内層シート２２との間の隣り合う弾性部材間に接着剤が実質的に塗布されていないことにより、ウエスト部Ｆの柔軟性及び風合いの一層の向上が図られ、ウエスト部Ｆの折れをより効果的に防止することができる。 Further, in the existence area H of the folded portion 2A in the present embodiment, excluding the existence area of the absorbent main body 3 (area where the absorbent main body 3 is disposed) and the widthwise both ends 2b and 2b of the outer packaging material 2 Adhesive agent between adjacent elastic members between the outer layer sheet 21 and the inner layer sheet 22 (between the plurality of elastic members 23, between the plurality of elastic members 24, and between the elastic member 23 and the elastic member 24). Is not substantially applied. Here, “substantially no adhesive is applied” means not only when no adhesive is applied, but also when a small amount of adhesive is applied (adhesive application amount is preferably 1 g). / M 2 or less).
Since the adhesive is not substantially applied between the elastic members adjacent to each other between the outer layer sheet 21 and the inner layer sheet 22 in such a region, the flexibility of the waist portion F and the texture can be further improved. The bending of the waist part F can be prevented more effectively.

一方、外層シート２１と内層シート２２との間に配されている弾性部材２３，２４，２５，２６には、接着剤が塗布されていても良い。即ち、外層シート２１と内層シート２２との間に配されている弾性部材に接着剤が塗布されており、該弾性部材と外層シート２１及び内層シート２２それぞれとの間が該接着剤により接合されていても良い。斯かる形態を採用しても、ウエスト部Ｆの柔軟性及び風合い、並びにウエスト部Ｆの折れ防止の点で、満足できる結果が得られる。   On the other hand, an adhesive may be applied to the elastic members 23, 24, 25, and 26 disposed between the outer layer sheet 21 and the inner layer sheet 22. That is, an adhesive is applied to an elastic member disposed between the outer layer sheet 21 and the inner layer sheet 22, and the elastic member and each of the outer layer sheet 21 and the inner layer sheet 22 are joined by the adhesive. May be. Even if such a form is adopted, satisfactory results can be obtained in terms of flexibility and texture of the waist portion F and prevention of breakage of the waist portion F.

本実施形態においては、外層シート２１と内層シート２２とは、後述する複合伸縮部４に対応する領域（胴回りギャザーＧ１及びウエストギャザーＧ２の形成領域）の略全域、及び股下部Ｃに対応する領域の略全域においては、接着剤を用いずに熱融着によって互いに部分的に接合されている。従って、斯かる領域における両シート２１，２２間の隣り合う弾性部材間には、接着剤は塗布されていない。
また、本実施形態においては、両シート２１，２２間に配されている複数本の弾性部材のうち、後述する複合伸縮部４に対応する領域に配されている弾性部材２３，２４は、上述したように、その長さ方向の両端部（外包材２の幅方向両端部２ｂ，２ｂ）及び折り返し部２Ａの存在領域Ｈにおける吸収性本体３の存在領域においてのみ、両シート２１，２２に接着剤によって固定されており、これら以外の部分には接着剤は塗布されていないため、両シート２１，２２間における接着剤の使用量が、従来に比してかなり低減されている。このような、接着剤の使用量の少ない形態は、通気性や透湿性の点で好ましい。 In the present embodiment, the outer layer sheet 21 and the inner layer sheet 22 are substantially the entire region corresponding to the composite stretchable portion 4 described later (the region where the waistline gather G1 and the waist gather G2 are formed) and the region corresponding to the crotch part C. In substantially the whole area, the parts are partially joined to each other by heat fusion without using an adhesive. Therefore, the adhesive is not applied between the adjacent elastic members between the sheets 21 and 22 in such a region.
Moreover, in this embodiment, the elastic members 23 and 24 distribute | arranged to the area | region corresponding to the composite expansion-contraction part 4 mentioned later among the several elastic members distribute | arranged between both the sheets 21 and 22 are mentioned above. As described above, both the sheets 21 and 22 are bonded only in both ends in the length direction (the width direction both ends 2b and 2b of the outer packaging material 2) and the region where the absorbent main body 3 exists in the region H where the folded portion 2A exists. Since the adhesive is fixed by the agent and no adhesive is applied to the other portions, the amount of the adhesive used between the sheets 21 and 22 is considerably reduced as compared with the prior art. Such a form with a small amount of adhesive used is preferable in terms of air permeability and moisture permeability.

本実施形態の使い捨ておむつ１について更に詳述する。
外包材２の腹側部Ａ及び背側部Ｂにおけるウエスト部Ｆには、それぞれウエストギャザーＧ２が設けられている。ウエスト部Ｆとは、ウエスト開口部１２の周縁端１２ａから下方に３０ｍｍ離間した位置までの領域をいい、例えば、腹側のウエスト開口部１２の周縁端１２ａの位置と、背側のウエスト開口部１２の周縁端１２ａの位置とがずれている場合（図示せず）においては、ずれて延出している領域がないものと仮定した上で、ウエスト部Ｆの範囲を定める。 The disposable diaper 1 of this embodiment is further explained in full detail.
Waist gathers G <b> 2 are provided in the waist portions F of the ventral side A and the back side B of the outer packaging material 2. The waist portion F refers to a region from the peripheral edge 12a of the waist opening 12 to a position spaced 30 mm downward, for example, the position of the peripheral edge 12a of the abdominal waist opening 12 and the back waist opening. In the case where the position of the peripheral edge 12a of 12 is shifted (not shown), the range of the waist portion F is determined on the assumption that there is no shifted and extended region.

腹側部Ａ及び背側部Ｂそれぞれにおけるウエスト部Ｆには、ウエスト開口部１２の周縁部に沿って、複数本のウエスト弾性部材（弾性部材）２４が配されている。そして、外層シート２１、内層シート２２及びウエスト弾性部材２４を主体として複合伸縮部４（詳細は後述）が形成されており、この複合伸縮部４により、一対のサイドシール部１１の間に亘って（ウエスト部Ｆの全周に亘って）ウエストギャザーＧ２が形成されている。   A plurality of waist elastic members (elastic members) 24 are arranged along the peripheral edge of the waist opening 12 in the waist F of each of the ventral side A and the back side B. A composite stretchable part 4 (details will be described later) is formed mainly of the outer layer sheet 21, the inner layer sheet 22 and the waist elastic member 24. The composite stretchable part 4 extends between the pair of side seal parts 11. A waist gather G2 is formed (over the entire circumference of the waist portion F).

外包材２には一対のレッグ開口部１３に沿ってレッグギャザーＧ３が設けられている。詳述すると、股下部Ｃにおいて湾曲したレッグ開口部１３には、各周縁部に沿って、複数本のレッグ弾性部材（弾性部材）２５が配されている。レッグ弾性部材２５は、接着剤を介して外層シート２１と内層シート２２との間に伸長状態で固定されている。これにより、レッグ開口部１３に沿ってレッグギャザーＧ３が形成されている。   The outer packaging material 2 is provided with a leg gather G3 along a pair of leg openings 13. More specifically, a plurality of leg elastic members (elastic members) 25 are arranged along each peripheral edge of the leg opening 13 curved in the crotch part C. The leg elastic member 25 is fixed in an extended state between the outer layer sheet 21 and the inner layer sheet 22 via an adhesive. Thereby, a leg gather G3 is formed along the leg opening 13.

外包材２の腹側部Ａ及び背側部Ｂにおける胴回り部Ｄには、複合伸縮部４（詳細は後述）から形成された胴回りギャザーＧ１が設けられている。胴回り部Ｄとは、ウエスト部Ｆの下方からレッグ開口部１３の上端までの領域をいう。胴回り部Ｄについて詳述すると、胴回り部Ｄには、幅方向に沿って複数本の胴回り弾性部材（弾性部材）２３が配されている。胴回り弾性部材２３は、吸収性本体３の側縁部近傍とサイドシール部１１との間に亘っており、吸収性本体３の側縁部近傍同士の間には配されていない。   A waistline gather D1 formed of a composite stretchable part 4 (details will be described later) is provided on the waistline part D of the abdomen A and back side B of the outer packaging material 2. The waistline portion D is a region from the lower portion of the waist portion F to the upper end of the leg opening 13. The waistline portion D will be described in detail. The waistline portion D is provided with a plurality of waistline elastic members (elastic members) 23 along the width direction. The waistline elastic member 23 extends between the vicinity of the side edge of the absorbent main body 3 and the side seal portion 11, and is not disposed between the vicinity of the side edge of the absorbent main body 3.

そして、外層シート２１、内層シート２２及び胴回り弾性部材２３を主体として複合伸縮部４が形成されており、この複合伸縮部４により、吸収性本体３の側縁部近傍とサイドシール部１１との間に亘って幅方向に配された胴回りギャザーＧ１が、幅方向に一対形成されている。胴回りギャザーＧ１は、吸収性本体３の側縁部近傍同士の間には配されていない。尚、「吸収性本体３の側縁部近傍」とは、吸収性本体３の側縁から幅方向内方に３０ｍｍ以内、幅方向外方に２０ｍｍ以内の領域をいう。   And the composite elastic part 4 is formed mainly by the outer layer sheet 21, the inner layer sheet 22, and the waistline elastic member 23. By this composite elastic part 4, the vicinity of the side edge part of the absorbent main body 3 and the side seal part 11 are formed. A pair of waistline gathers G1 arranged in the width direction is formed in the width direction. The waistline gather G1 is not disposed between the side edge portions of the absorbent main body 3. The “near side edge of the absorbent main body 3” refers to a region within 30 mm inward in the width direction and within 20 mm outward in the width direction from the side edge of the absorbent main body 3.

前股間部Ｅについて説明すると、前股間部Ｅとは、股下部Ｃを長手方向に４分したときにおける最も前側の領域をいう。前股間部Ｅには、複数本の前股間弾性部材（弾性部材）２６が幅方向全域に亘って配されている。前股間弾性部材２６は、接着剤を介して外層シート２１と内層シート２２との間に伸長状態で固定されている。これにより、前股間部Ｅに前股間ギャザーＧ４が形成されている。   The front crotch portion E will be described. The front crotch portion E refers to the foremost region when the crotch portion C is divided into four in the longitudinal direction. In the front crotch part E, a plurality of front crotch elastic members (elastic members) 26 are arranged over the entire width direction. The front crotch elastic member 26 is fixed in an extended state between the outer layer sheet 21 and the inner layer sheet 22 via an adhesive. Thus, a front crotch gather G4 is formed in the front crotch part E.

外包材２における吸収性本体３との対向領域には、図３に示すように、弾性部材の収縮力を発現させなくしてなる非機能化領域５１が形成されている。本実施形態における非機能化領域５１は、胴回り弾性部材２３及び前股間弾性部材２６の収縮力を発現させなくして形成されている。非機能化領域５１は、素材状態では外包材２の幅方向全域に亘って配設されている胴回り弾性部材２３及び前股間弾性部材２６について、部分的に収縮力を発現させなくして形成される領域である。収縮力を発現させなくするには、例えば、弾性部材を分断する多数の凸部やカッター刃、弾性部材を熱シールによって硬化させる多数のエンボスピン等が用いられる。   As shown in FIG. 3, a non-functionalized region 51 that prevents the elastic member from contracting is formed in a region of the outer packaging material 2 facing the absorbent main body 3. The non-functionalized region 51 in the present embodiment is formed without expressing the contraction force of the waistline elastic member 23 and the front crotch elastic member 26. The non-functionalized region 51 is formed in the material state without partially expressing the contraction force with respect to the waistline elastic member 23 and the front crotch elastic member 26 disposed over the entire width direction of the outer packaging material 2. It is an area. In order to prevent the contraction force from appearing, for example, a large number of convex portions and cutter blades that divide the elastic member, a large number of emboss pins that harden the elastic member by heat sealing, and the like are used.

非機能化領域５１が形成されることにより、外包材２の幅方向全域に亘って配設されている胴回り弾性部材２３及び前股間弾性部材２６から、幅方向に分離した一対の胴回りギャザーＧ１及び前股間ギャザーＧ４が形成される。
幅方向に一対の胴回りギャザーＧ１の間に位置する非機能化領域５１は、外層シート２１及び内層シート２２に接合されている胴回り弾性部材２３について、その一部の収縮力を発現させなくして形成されるものであり、これに対し、幅方向に一対の前股間ギャザーＧ４の間に位置する非機能化領域５１は、外層シート２１及び内層シート２２に接合されている前股間弾性部材２６について、その一部の収縮力を発現させなくして形成されるものである。これにより、吸収性本体３の収縮を防止することができ、吸収性本体３の良好な外観及び吸収性能を実現することができる。 By forming the non-functionalized region 51, a pair of waistline gathers G1 separated in the width direction from the waistline elastic member 23 and the front crotch elastic member 26 disposed over the entire width direction of the outer packaging material 2 and A front crotch gather G4 is formed.
The non-functionalized region 51 located between the pair of waistline gathers G1 in the width direction is formed without causing the partial contraction force of the waistline elastic member 23 joined to the outer layer sheet 21 and the inner layer sheet 22 to be expressed. In contrast, the non-functionalized region 51 positioned between the pair of front crotch gathers G4 in the width direction is the front crotch elastic member 26 joined to the outer layer sheet 21 and the inner layer sheet 22. A part of the contraction force is not expressed. Thereby, shrinkage | contraction of the absorptive main body 3 can be prevented, and the favorable external appearance and absorption performance of the absorptive main body 3 can be implement | achieved.

股下部Ｃの幅方向中央部となる位置には、レッグ弾性部材切断領域５２が形成されている。レッグ弾性部材切断領域５２は、素材状態では外包材２の幅方向全域に湾曲状に亘って配設されているレッグ弾性部材２５の連続体２５Ｓについて、股下部Ｃの幅方向中央部となる位置で切断した領域である。レッグ弾性部材切断領域５２を形成するには、例えば、弾性部材を分断する多数の凸部やカッター刃が用いられる。
レッグ弾性部材切断領域５２が形成されることにより、外包材２の幅方向全域に湾曲状に亘って配設されているレッグ弾性部材２５の連続体２５Ｓから、股下部Ｃの幅方向中央において幅方向に分離した一対のレッグ弾性部材２５，２５が形成される。 A leg elastic member cutting region 52 is formed at a position that is the center of the crotch C in the width direction. The leg elastic member cutting region 52 is a position that becomes the central portion in the width direction of the crotch part C with respect to the continuous body 25S of the leg elastic member 25 disposed in a curved shape over the entire width direction of the outer packaging material 2 in the raw material state. This is the area cut by. In order to form the leg elastic member cutting region 52, for example, a large number of convex portions and cutter blades that divide the elastic member are used.
By forming the leg elastic member cutting region 52, the width in the center of the crotch part C in the width direction is increased from the continuous body 25S of the leg elastic member 25 arranged in a curved shape over the entire width direction of the outer packaging material 2. A pair of leg elastic members 25, 25 separated in the direction is formed.

本実施形態においては、外包材２の股下部Ｃには後述する複合伸縮部４が設けられていない。これにより、吸収性本体３の前方にて***された尿が、後方へスムーズに移行することが可能となり、吸収性能が格段に改善される。
レッグ弾性部材２５及び前股間弾性部材２６としては、それぞれ、天然ゴム、ポリウレタン系樹脂、発泡ウレタン系樹脂、ホットメルト系伸縮部材等の伸縮性素材を糸状（糸ゴム）又は帯状（平ゴム）に形成したものが好ましく用いられる。 In the present embodiment, the crotch part C of the outer packaging material 2 is not provided with a composite stretchable part 4 described later. Thereby, the urine excreted in front of the absorbent main body 3 can be smoothly transferred to the rear, and the absorption performance is remarkably improved.
As the leg elastic member 25 and the front crotch elastic member 26, elastic materials such as natural rubber, polyurethane resin, foamed urethane resin, and hot-melt elastic member are formed into a thread shape (thread rubber) or a belt shape (flat rubber), respectively. Those formed are preferably used.

次に、本実施形態において胴回りギャザーＧ１及びウエストギャザーＧ２を形成する複合伸縮部４について詳述する。複合伸縮部４は、図７及び図８に示すように、下記（１）〜（３）の構成を具備している。
（１）外層シート２１及び内層シート２２は、複合伸縮部４の伸縮方向（Ｘ方向）及びそれに直交する方向（Ｙ方向）において間欠的な接合部４１により互いに接合されている。
（２）弾性部材４２は、接合部４１を通らないように配されると共に、弾性部材４２の長さ方向の両端部を除いた部分において外層シート２１及び内層シート２２に固定されていない。
（３）外層シート２１及び内層シート２２それぞれは、各々複数本の弾性部材４２に亘って連続して延びる複数本の襞４３を形成している。 Next, the composite elastic part 4 which forms the waistline gather G1 and the waist gather G2 in this embodiment is explained in full detail. As shown in FIGS. 7 and 8, the composite stretchable part 4 has the following configurations (1) to (3).
(1) The outer layer sheet 21 and the inner layer sheet 22 are joined to each other by an intermittent joining portion 41 in the stretching direction (X direction) of the composite stretchable portion 4 and the direction (Y direction) perpendicular thereto.
(2) The elastic member 42 is arranged so as not to pass through the joint portion 41, and is not fixed to the outer layer sheet 21 and the inner layer sheet 22 in a portion excluding both end portions in the length direction of the elastic member 42.
(3) Each of the outer layer sheet 21 and the inner layer sheet 22 forms a plurality of ridges 43 extending continuously over a plurality of elastic members 42.

吸収性本体３の長手方向に隣接する、ウエストギャザーＧ２を形成する複合伸縮部４及び胴回りギャザーＧ１を形成する複合伸縮部４において、複数本の襞４３は、複合伸縮部４の伸縮方向に直交する方向全域に亘って連続している。このように襞４３が複合伸縮部４の伸縮方向に直交する方向全域に亘っていると、おむつ幅方向のサイド部分〔吸収性本体３の側縁部とサイドシール部１１との間の領域（但し、サイドシール部１１自体は含まない）〕の全域において外観、クッション性及び通気性に優れる。   In the composite stretchable part 4 that forms the waist gather G2 and the composite stretchable part 4 that forms the waistline gather G1, which are adjacent to the longitudinal direction of the absorbent main body 3, the plurality of ridges 43 are orthogonal to the stretch direction of the composite stretchable part 4. It is continuous over the entire direction. As described above, when the flange 43 extends over the entire region orthogonal to the expansion / contraction direction of the composite expansion / contraction part 4, the side part in the diaper width direction [the region between the side edge of the absorbent main body 3 and the side seal part 11 ( However, the side seal portion 11 itself is not included)], and the appearance, cushioning properties and air permeability are excellent.

本実施形態においては、吸収性本体３の長手方向に隣接する、ウエストギャザーＧ２を形成する複合伸縮部４及び胴回りギャザーＧ１を形成する複合伸縮部４は、前述したように、吸収性本体３の側縁部近傍とサイドシール部１１との間に亘って幅方向に配されているが、吸収性本体３の側縁部近傍同士の間には配されていない。換言すると、吸収性本体３の側縁部近傍同士の間には、胴回りギャザーＧ１は設けられておらず、ウエストギャザーＧ２のみが設けられている。   In the present embodiment, the composite stretchable part 4 that forms the waist gather G2 and the composite stretchable part 4 that forms the waistline gather G1 that are adjacent to each other in the longitudinal direction of the absorbent main body 3 are as described above. Although it distribute | arranges in the width direction between the side edge part vicinity and the side seal part 11, it is not distribute | arranged between the side edge part vicinity of the absorptive main body 3. FIG. In other words, the waistline gather G1 is not provided between the side edge portions of the absorbent main body 3, and only the waist gather G2 is provided.

本実施形態においては、複合伸縮部４から形成された胴回りギャザーＧ１は、外層シート２１、内層シート２２及び胴回り弾性部材２３を主体として構成されており、複合伸縮部４から形成されたウエストギャザーＧ２は、外層シート２１、内層シート２２及びウエスト弾性部材２４を主体として構成されている。このように、ギャザーによってそれを構成する弾性部材が異なるが、以下の複合伸縮部４の説明においては、複合伸縮部４を構成する弾性部材を「弾性部材４２」として説明する。   In the present embodiment, the waistline gather G1 formed from the composite stretchable part 4 is composed mainly of the outer layer sheet 21, the inner layer sheet 22, and the waistline elastic member 23, and the waist gather G2 formed from the composite stretchable part 4. Is mainly composed of an outer layer sheet 21, an inner layer sheet 22, and a waist elastic member 24. Thus, although the elastic member which comprises it changes with gathers, in the following description of the composite expansion-contraction part 4, the elastic member which comprises the composite expansion-contraction part 4 is demonstrated as the "elastic member 42".

複合伸縮部４においては、全ての弾性部材４２が全ての接合部４１を通らないように構成されていることが好ましいが、例えば、製造誤差上、若干の弾性部材４２が一部の接合部４１を通ってしまうことがある。また、若干の弾性部材４２が一部の接合部４１を通ったとしても、本発明の効果は十分に達成される。従って、複合伸縮部４に設けられた接合部４１のうち、７０％（個／個）以上の接合部４１を弾性部材４２が通っていない場合には、弾性部材４２が接合部４１を通らないように構成されているものとする。   In the composite stretchable part 4, it is preferable that all the elastic members 42 do not pass through all the joints 41. However, for example, some elastic members 42 are part of the joints 41 due to manufacturing errors. May pass through. Even if some elastic members 42 pass through some of the joint portions 41, the effects of the present invention are sufficiently achieved. Therefore, when the elastic member 42 does not pass through 70% (pieces / pieces) or more of the joint portions 41 provided in the composite stretchable portion 4, the elastic member 42 does not pass through the joint portion 41. It shall be comprised as follows.

複合伸縮部４を構成する外層シート２１及び内層シート２２は、図７及び図８に示すように、複合伸縮部４の伸縮方向（Ｘ方向）及びそれに直交する方向（Ｙ方向）のそれぞれにおいて、接合部４１により間欠的に互いに接合されている。接合部４１は、好ましくは熱融着により形成される。
複数本の弾性部材４２は、互いに平行に配されており、それぞれ複合伸縮部４の長手方向に沿って延びるように配されている。本実施形態のように複数本の弾性部材４２が互いに平行に配されている場合においては、複合伸縮部４の伸縮方向は、弾性部材４２が延びる方向と同じ方向である。複数本の弾性部材４２が互いに平行に配されていない場合においては、複合伸縮部４の伸縮方向は、複数本の弾性部材４２に亘って延びる襞４３（後述）における、襞４３が延びる方向に直交する方向とする。 As shown in FIGS. 7 and 8, the outer layer sheet 21 and the inner layer sheet 22 constituting the composite stretchable part 4 are respectively in the stretch direction (X direction) of the composite stretchable part 4 and the direction (Y direction) orthogonal thereto. The joints 41 are intermittently joined together. The joint portion 41 is preferably formed by heat sealing.
The plurality of elastic members 42 are arranged in parallel to each other, and are arranged so as to extend along the longitudinal direction of the composite stretchable part 4. When a plurality of elastic members 42 are arranged in parallel to each other as in the present embodiment, the expansion / contraction direction of the composite expansion / contraction part 4 is the same direction as the direction in which the elastic member 42 extends. When the plurality of elastic members 42 are not arranged in parallel to each other, the expansion / contraction direction of the composite expansion / contraction part 4 is in the direction in which the flange 43 extends in a flange 43 (described later) extending over the plurality of elastic members 42. The direction is orthogonal.

図８は、接合部４１の配列パターンを示す図である。接合部４１は、複合伸縮部４の伸縮方向（Ｘ方向）及びそれに直交する方向（Ｙ方向）にそれぞれ列をなすように形成されており、該直交する方向の列を構成する接合部４１が各弾性部材４２同士の間毎に形成されている。そして、自然状態（外力を加えない状態）において、弾性部材４２が収縮して、外層シート２１及び内層シート２２のそれぞれが、各々複数本の弾性部材４２に亘って連続して延びる複数本の襞（ギャザー）４３を形成している。本実施形態においては、複合伸縮部４の伸縮方向（Ｘ方向）において相隣接する接合部４１，４１間に、それぞれ１本の襞４３が形成されている。   FIG. 8 is a diagram illustrating an arrangement pattern of the joint portions 41. The joint portions 41 are formed so as to form rows in the stretching direction (X direction) of the composite stretchable portion 4 and the direction (Y direction) perpendicular thereto, and the joint portions 41 constituting the row in the perpendicular direction are formed. It is formed between each elastic member 42. In a natural state (a state in which no external force is applied), the elastic member 42 contracts, and each of the outer layer sheet 21 and the inner layer sheet 22 continuously extends over the plurality of elastic members 42. (Gather) 43 is formed. In the present embodiment, one ridge 43 is formed between the joint portions 41, 41 adjacent to each other in the expansion / contraction direction (X direction) of the composite expansion / contraction portion 4.

複数本の弾性部材４２に亘って連続して延びる襞４３を確実に形成させる観点から、複合伸縮部４の伸長時において、複合伸縮部４の伸縮方向（Ｘ方向）における接合部４１のピッチＰ２（図８参照）は、１〜２０ｍｍ、特に３〜１０ｍｍであることが好ましく、各接合部４１の長さＬ２（図８参照）は、０．１〜５ｍｍ、特に０．２〜１．５ｍｍであることが好ましい。前記ピッチＰ２と前記長さＬ２との比（Ｐ２／Ｌ２）は、１．１〜２００、特に２〜５０であることが好ましい。   From the viewpoint of reliably forming the flanges 43 extending continuously over the plurality of elastic members 42, the pitch P <b> 2 of the joint portions 41 in the expansion / contraction direction (X direction) of the composite expansion / contraction portion 4 when the composite expansion / contraction portion 4 extends. (See FIG. 8) is preferably 1 to 20 mm, particularly 3 to 10 mm, and the length L2 (see FIG. 8) of each joint 41 is 0.1 to 5 mm, particularly 0.2 to 1.5 mm. It is preferable that The ratio (P2 / L2) between the pitch P2 and the length L2 is preferably 1.1 to 200, particularly 2 to 50.

複合伸縮部４において、その伸縮方向に直交する方向（Ｙ方向）における接合部４１のピッチＰ３（図８参照）は、１〜４０ｍｍ、特に２〜１５ｍｍであることが好ましく、各接合部４１の長さＬ３（図８参照）は、０．５〜２０ｍｍ、特に１〜１０ｍｍであることが好ましい。また、前記ピッチＰ３と前記長さＬ３との比（Ｐ３／Ｌ３）は、１．０５〜８０、特に１．０５〜１５であることが好ましい。   In the composite stretchable part 4, the pitch P3 (see FIG. 8) of the joints 41 in the direction (Y direction) orthogonal to the stretch direction is preferably 1 to 40 mm, particularly 2 to 15 mm. The length L3 (see FIG. 8) is preferably 0.5 to 20 mm, particularly 1 to 10 mm. The ratio (P3 / L3) between the pitch P3 and the length L3 is preferably 1.05 to 80, particularly 1.05 to 15.

複合伸縮部４において、外層シート２１及び内層シート２２は、接合部４１以外の部位においては互いに接合されていないことが好ましい。各弾性部材４２は、外層シート２１及び内層シート２２同士の接合部４１を通らないように複合伸縮部４に配されており、弾性部材４２の両端部を除いた部分において外層シート２１及び内層シート２２に固定されていない。即ち、各弾性部材４２は、その両端部においてのみ、外層シート２１及び内層シート２２に固定されている。   In the composite stretchable part 4, the outer layer sheet 21 and the inner layer sheet 22 are preferably not joined to each other at a part other than the joint part 41. Each elastic member 42 is disposed in the composite stretchable part 4 so as not to pass through the joint part 41 between the outer layer sheet 21 and the inner layer sheet 22, and the outer layer sheet 21 and the inner layer sheet are excluded from the portions excluding both ends of the elastic member 42. 22 is not fixed. That is, each elastic member 42 is fixed to the outer layer sheet 21 and the inner layer sheet 22 only at both ends thereof.

弾性部材４２の両端部は、複合伸縮部４の両端部４４（一方のみ図示）において、外層シート２１及び内層シート２２に挟まれた状態で外層シート２１と内層シート２２との間に固定されている。複合伸縮部４の両端部４４は、それによって形成されるギャザーによって異なる。図１に示す実施形態においては、胴回りギャザーＧ１を形成する複合伸縮部４の両端部４４は、吸収性本体３の側縁部近傍及びサイドシール部１１であり、ウエストギャザーＧ２を形成する複合伸縮部４の両端部４４は、両サイドシール部１１，１１である。尚、複合伸縮部４の両端部４４は伸縮可能に形成してもよい。   Both end portions of the elastic member 42 are fixed between the outer layer sheet 21 and the inner layer sheet 22 in a state sandwiched between the outer layer sheet 21 and the inner layer sheet 22 at both end portions 44 (only one is shown) of the composite stretchable portion 4. Yes. Both end portions 44 of the composite stretchable portion 4 differ depending on the gathers formed thereby. In the embodiment shown in FIG. 1, both end portions 44 of the composite stretchable part 4 that forms the waistline gather G1 are the vicinity of the side edge of the absorbent main body 3 and the side seal part 11, and the composite stretchable part that forms the waist gather G2. Both end portions 44 of the portion 4 are both side seal portions 11, 11. In addition, you may form the both ends 44 of the composite expansion-contraction part 4 so that expansion-contraction is possible.

外層シート２１及び内層シート２２における各襞４３は、複合伸縮部４の両面それぞれに突出するように形成されており、各襞４３の突出方向の先端部には、断面円弧状の凸曲面が形成されている。この凸曲面は、複合伸縮部４の伸縮方向に直交する方向（Ｙ方向）に連続的に延びている。本実施形態においては、複合伸縮部４の伸縮方向（Ｘ方向）において相隣接する接合部４１，４１間に、それぞれ１本の襞４３が形成されており、それらの襞４３は、弾性部材４２と重なる箇所において分断されることなく、複合伸縮部４の伸縮方向に直交する方向（Ｙ方向）に連続的に延びている。   Each ridge 43 in the outer layer sheet 21 and the inner layer sheet 22 is formed so as to protrude from both surfaces of the composite stretchable portion 4, and a convex curved surface having an arcuate cross section is formed at the tip in the protruding direction of each ridge 43. Has been. The convex curved surface continuously extends in a direction (Y direction) orthogonal to the expansion / contraction direction of the composite expansion / contraction part 4. In the present embodiment, one ridge 43 is formed between the joint portions 41, 41 adjacent to each other in the expansion / contraction direction (X direction) of the composite expansion / contraction portion 4, and these ridges 43 are elastic members 42. Without being divided at the overlapping portion, and continuously extending in the direction (Y direction) orthogonal to the expansion / contraction direction of the composite expansion / contraction part 4.

弾性部材４２は、好ましくは１２０〜１１００％、特に好ましくは１５０〜５００％の伸長状態にて、外層シート２１と内層シート２２との間に導入され、弾性部材４２と重ならない領域で外層シート２１と内層シート２２とが接合される。そして、弾性部材４２が収縮し、収縮した部分の外層シート２１及び内層シート２２が余り、余った外層シート２１及び内層シート２２が、接合部４１の貼り合わせ面とは反対側の方向に（外側に）断面凸形状に変形することによって襞４３が形成される。   The elastic member 42 is introduced between the outer layer sheet 21 and the inner layer sheet 22 in a stretched state of preferably 120 to 1100%, particularly preferably 150 to 500%, and the outer layer sheet 21 does not overlap the elastic member 42. And the inner layer sheet 22 are joined. Then, the elastic member 42 contracts, the contracted portions of the outer layer sheet 21 and the inner layer sheet 22 remain, and the remaining outer layer sheet 21 and inner layer sheet 22 extend in the direction opposite to the bonding surface of the joint portion 41 (outside). (Ii) The ridge 43 is formed by deforming into a convex cross section.

本実施形態における複合伸縮部４は、弾性部材４２の収縮により形成された多数の襞４３，４３のそれぞれが、複合伸縮部４の伸縮方向に直交する方向（Ｙ方向）に連続的に延びているため、見た目が非常に美しい。   In the composite stretchable part 4 in this embodiment, each of a large number of ridges 43, 43 formed by contraction of the elastic member 42 extends continuously in a direction (Y direction) perpendicular to the stretchable direction of the composite stretchable part 4. So it looks very beautiful.

また、本実施形態における複合伸縮部４は、剛性の増加を防止できると共に、外力に対する襞４３の変形自由度が向上している。この剛性の増加の防止及び襞４３の変形自由度の向上は、弾性部材４２が、外層シート２１における襞４３と襞４３との間の谷部と、内層シート２２における襞４３と襞４３との間の谷部との間に挟まれた状態で存在し、それらの谷部同士間に挟まれた部分を含めて、外層シート２１及び内層シート２２の何れにも接合されていない状態で存在すること、並びに複合伸縮部４における外層シート２１及び内層シート２２が、複合伸縮部４の伸縮方向（Ｘ方向）及びそれに直交する方向（Ｙ方向）の何れの方向においても連続的に接合されていないことに基づいている。
更に、襞４３の先端部が凸曲面を形成していることとの相乗効果により、外層シート２１及び内層シート２２の厚み方向にボリュームが出ると共に、複合伸縮部４の表面に触れたときの感触が極めて柔らかく、肌触りが極めて良好である。 Moreover, the composite elastic part 4 in this embodiment can prevent the increase in rigidity, and the degree of freedom of deformation of the flange 43 with respect to external force is improved. The prevention of the increase in rigidity and the improvement of the degree of freedom of deformation of the flange 43 are such that the elastic member 42 is formed between the valley between the flange 43 and the flange 43 in the outer layer sheet 21 and the flange 43 and the flange 43 in the inner layer sheet 22. It exists in a state of being sandwiched between the valleys between them, and is present in a state where it is not joined to any of the outer layer sheet 21 and the inner layer sheet 22 including the portion sandwiched between those valleys. In addition, the outer layer sheet 21 and the inner layer sheet 22 in the composite stretchable part 4 are not continuously joined in any direction of the stretchable direction (X direction) of the composite stretchable part 4 and the direction (Y direction) perpendicular thereto. Is based on that.
Furthermore, a volume is generated in the thickness direction of the outer layer sheet 21 and the inner layer sheet 22 due to a synergistic effect with the tip part of the collar 43 forming a convex curved surface, and the touch when the surface of the composite stretchable part 4 is touched. Is very soft and very soft to the touch.

また、複合伸縮部４における弾性部材４２が、外層シート２１及び内層シート２２に接合されていない状態で存在するため、ホットメルト型接着剤の使用量をゼロ又は少量に抑制することができる。特に本実施形態のように、外層シート２１及び内層シート２２同士の接合部４１による接合を熱融着によって行なった場合には、接着剤の使用量の低減効果は一層顕著である。ホットメルト型接着剤の使用量が少ないので、通気性や透湿性を損なうこともない。   Moreover, since the elastic member 42 in the composite stretchable part 4 is present in a state where it is not joined to the outer layer sheet 21 and the inner layer sheet 22, the amount of hot melt adhesive used can be suppressed to zero or a small amount. In particular, as in the present embodiment, when the outer layer sheet 21 and the inner layer sheet 22 are joined to each other by the joining portion 41 by heat fusion, the effect of reducing the amount of adhesive used is more remarkable. Since the amount of hot-melt adhesive used is small, air permeability and moisture permeability are not impaired.

本実施形態における複合伸縮部４の形成材料について説明する。
外層シート２１及び内層シート２２としては、見た目が美しく、感触の良い柔軟な襞４３を形成させる観点から、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、スパンボンドとメルトブローンを重ね合わせた複合不織布等であることが好ましい。 The material for forming the composite stretchable part 4 in this embodiment will be described.
As the outer layer sheet 21 and the inner layer sheet 22, air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, spunbond and meltblown are used from the viewpoint of forming a flexible ridge 43 having a beautiful appearance and good touch. It is preferable that the composite non-woven fabric is superposed.

外層シート２１の無荷重下における厚みは、好ましくは０．２５〜２．０ｍｍ、更に好ましくは０．３〜１．０ｍｍである。外層シート２１の厚みが薄過ぎると、襞４３が尖りやすく、ふっくらとした襞４３が得られにくい。一方、外層シート２１の厚みが厚過ぎると、襞４３の断面形状が綺麗な曲線状とならず、襞４３が尖りやすい。
内層シート２２の無荷重下における厚みは、好ましくは０．１〜１．５ｍｍ、更に好ま しくは０．１〜１．０ｍｍである。
また、上述したように、外層シート２１及び内層シート２２としては不繊布が好ましく用いられる。不織布の坪量は、好ましくは５〜５０ｇ／ｍ2、特に好ましくは１０〜３０ｇ／ｍ2である。 The thickness of the outer layer sheet 21 under no load is preferably 0.25 to 2.0 mm, more preferably 0.3 to 1.0 mm. When the thickness of the outer layer sheet 21 is too thin, the ridges 43 are easy to be sharpened, and the plump ridges 43 are difficult to obtain. On the other hand, when the thickness of the outer layer sheet 21 is too thick, the cross-sectional shape of the ridge 43 does not become a beautiful curved shape, and the ridge 43 tends to be sharp.
The thickness of the inner layer sheet 22 under no load is preferably 0.1 to 1.5 mm, and more preferably 0.1 to 1.0 mm.
Further, as described above, non-woven cloth is preferably used as the outer layer sheet 21 and the inner layer sheet 22. The basis weight of the nonwoven fabric is preferably 5 to 50 g / m 2 , particularly preferably 10 to 30 g / m 2 .

また、外層シート２１及び内層シート２２は、熱融着による接合（接合部４１の形成）を容易にする観点から、その形成素材（不織布の場合は繊維）が熱融着性の樹脂からなることが好ましい。熱融着性の樹脂としては、ポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）、ポリエチレンテレフタレート（ＰＥＴ）等が挙げられる。繊維は、鞘が熱融着性の樹脂からなる芯鞘型の複合繊維等であってもよい。   In addition, the outer layer sheet 21 and the inner layer sheet 22 are made of a heat-fusible resin from the viewpoint of facilitating joining by heat-sealing (formation of the joining portion 41). Is preferred. Examples of the heat-fusible resin include polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). The fiber may be a core-sheath type composite fiber whose sheath is made of a heat-fusible resin.

外層シート２１には、外包材２の風合い向上や外観向上（弾性部材４２との一体化による隠蔽性）の点から、シートの風合い及び配向性が要求されている。従って、外層シート２１には、エアスルー法により製造されたエアスルー不織布が適している。特に好ましくはポリエチレン及びポリエチレンテレフタレートからなるエアスルー不織布である。
内層シート２２には、外包材２の強度、特に伸長時の破断強度が要求されている。従って、内層シート２２には、スパンボンド法により製造されたスパンボンド不織布が適している。特に好ましくはポリエチレン及びポリエチレンテレフタレートからなるスパンボンド不織布である。 The outer layer sheet 21 is required to have a texture and orientation of the sheet from the viewpoint of improving the texture and appearance of the outer packaging material 2 (concealment by integration with the elastic member 42). Therefore, an air-through nonwoven fabric manufactured by an air-through method is suitable for the outer layer sheet 21. Particularly preferred is an air-through nonwoven fabric made of polyethylene and polyethylene terephthalate.
The inner layer sheet 22 is required to have the strength of the outer packaging material 2, particularly the breaking strength when stretched. Therefore, a spunbond nonwoven fabric manufactured by a spunbond method is suitable for the inner layer sheet 22. Particularly preferred is a spunbonded nonwoven fabric made of polyethylene and polyethylene terephthalate.

複合伸縮部４における弾性部材４２の形成材料としては、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各種公知の弾性材料を特に制限なく用いることができる。弾性材料としては、例えば、スチレン−ブタジエン、ブタジエン、イソプレン、ネオプレン等の合成ゴム、天然ゴム、ＥＶＡ、伸縮性ポリオレフィン、ポリウレタン等を挙げることができる。弾性部材４２の形態としては、断面が矩形、正方形、円形、多角形状等の糸状（糸ゴム等）若しくは紐状（平ゴム等）のもの、又はマルチフィラメントタイプの糸状のもの等を用いることができる。   As a material for forming the elastic member 42 in the composite stretchable part 4, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the elastic material include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member 42, a thread-like (thread rubber etc.) or string-like (flat rubber etc.) having a cross section of a rectangle, square, circle, polygon or the like, or a multifilament type thread-like one or the like is used. it can.

以上の構成を有する本実施形態のパンツ型使い捨ておむつ１によれば、ウエスト部Ｆの構成部材である外包材２の折り返し部２Ａの存在領域Ｈにおける接着剤の塗布パターンとして、本体幅方向に延びる複数の線状の接着剤塗布部７０，７１を本体長手方向に間欠的に配してなるパターンを採用しているため、ウエスト部Ｆの柔軟性及び風合いに優れ、着用感が良好で、ウエスト部Ｆの折れを生じ難い。また、上述したように、外包材２に複合伸縮部４から形成されたギャザーＧ１，Ｇ２を設けることにより、複合伸縮部４の素材本来の質感や柔らかさ等により、ウエスト部Ｆの柔軟性及び風合い並びに着用感及びウエスト部の折れが更に改善される。
また、本実施形態のおむつ１によれば、吸収性本体３の長手方向両端部における肌当接面側が、外包材２の折り返し部２Ａによって被覆されているため、該長手方向両端部が着用者に直接接触すること、及び吸収性コア３４の長手方向両端部からの吸収性ポリマーの漏れを効果的に防止することができる。 According to the pants-type disposable diaper 1 of the present embodiment having the above-described configuration, it extends in the body width direction as an adhesive application pattern in the region H of the folded portion 2A of the outer packaging material 2 that is a constituent member of the waist portion F. Since a pattern formed by intermittently arranging a plurality of linear adhesive application portions 70 and 71 in the longitudinal direction of the main body is adopted, the waist portion F is excellent in flexibility and texture, has a good wearing feeling, and has a waist. It is difficult for the part F to be broken. Further, as described above, by providing the outer packaging material 2 with the gathers G1 and G2 formed from the composite stretchable portion 4, the material of the composite stretchable portion 4 can be made soft and flexible due to the original texture and softness of the material. The texture, the feeling of wearing and the folding of the waist are further improved.
Moreover, according to the diaper 1 of this embodiment, since the skin contact surface side in the longitudinal direction both ends of the absorptive main body 3 is coat | covered with the folding | turning part 2A of the outer packaging material 2, this longitudinal direction both ends are a wearer. It is possible to effectively prevent the leakage of the absorbent polymer from the both ends in the longitudinal direction of the absorbent core 34.

また、本実施形態のおむつ１によれば、主として複合伸縮部４の作用により、上述した効果に加えて更に下記効果も奏される。
即ち、胴回りギャザーＧ１及びウエストギャザーＧ２が複合伸縮部４から形成されており、ホットメルト型接着剤を実質的に用いなくても、ギャザーの伸縮性を発現させることができるため、腹側部Ａ及び背側部Ｂにおける通気性に優れている。また、外包材２の外層シート２１及び内層シート２２の素材本来の質感を活かすことができ、柔らかでゴワゴワしない。 Moreover, according to the diaper 1 of the present embodiment, the following effects are further exhibited in addition to the effects described above mainly by the action of the composite stretchable portion 4.
That is, the waist gather G1 and the waist gather G2 are formed from the composite stretchable part 4, and the stretchability of the gather can be expressed without substantially using a hot melt adhesive. And the breathability in the back side part B is excellent. Moreover, the raw material original texture of the outer-layer sheet 21 and the inner-layer sheet 22 of the outer packaging material 2 can be utilized, and it is soft and not stiff.

また、複合伸縮部４においては、弾性部材４２の収縮力が全く（又はほとんど）阻害されないため、収縮力が最大限活用される。例えば、横軸に胴回り部Ｄの周長、縦軸に胴回り部Ｄの引張荷重をとって伸縮特性をグラフ化すると、その特性曲線の傾きは緩く、即ち、伸長性が高いことがわかる。また、伸長時の特性曲線と収縮時の特性曲線との荷重差が小さく、即ち、周長の変動に対する荷重変動が小さく、お腹周りが小さい幼児も大きい幼児も同等な装着圧が得られるため、比較的お腹周りが小さい幼児に対するずれ落ち、比較的お腹周りが大きい子に対するゴム跡付き等の問題が解消され、着用者のサイズ適用範囲が大きくなることがわかる。   Moreover, in the composite elastic part 4, since the contraction force of the elastic member 42 is not inhibited at all (or almost), the contraction force is utilized to the maximum. For example, when the expansion / contraction characteristics are graphed by taking the circumference of the waistline D on the horizontal axis and the tensile load of the waistline D on the vertical axis, it can be seen that the slope of the characteristic curve is gentle, that is, the stretchability is high. In addition, since the load difference between the characteristic curve at the time of expansion and the characteristic curve at the time of contraction is small, that is, the load fluctuation with respect to the fluctuation of the circumference is small, and the same wearing pressure can be obtained for both small and large infants. It can be seen that problems such as slippage of an infant with a relatively small stomach circumference and rubber marks on a child with a relatively large stomach circumference are eliminated, and the size application range of the wearer is increased.

従って、収縮力が高いため、着用者に優しくフィットし、ずれ落ちにくい。また、おむつ全体として最大限収縮するため、コンパクトに見えるという利点がある。また、弾性部材４２の使用量を削減できるので、コスト面でも有利である。
複合伸縮部４の外面に襞４３が形成されており、襞４３が着用者との接触面となるため、着用時に複合伸縮部４のクッション性が高く、優しくフィットし、着用者の肌へのダメージが少ない。また、襞４３は外包材２の外面（着用時の外面）にも配されるため、外面の触感にも優れる。 Therefore, since the shrinkage force is high, it fits gently to the wearer and is difficult to slip off. Moreover, since the whole diaper shrinks to the maximum extent, there is an advantage that it looks compact. Moreover, since the usage-amount of the elastic member 42 can be reduced, it is advantageous also in terms of cost.
Since the heel 43 is formed on the outer surface of the composite stretchable portion 4 and the heel 43 is a contact surface with the wearer, the composite stretchable portion 4 has a high cushioning property when worn and fits gently to the wearer's skin. Less damage. Moreover, since the collar 43 is also arranged on the outer surface of the outer packaging material 2 (the outer surface when worn), the outer surface feels excellent.

また、吸収性本体３の長手方向に隣接する、ウエストギャザーＧ２を形成する複合伸縮部４及び胴回りギャザーＧ１を形成する複合伸縮部４において、複数本の襞４３は、複合伸縮部４の伸縮方向に直交する方向に亘って連続しており、複合伸縮部４の伸縮方向（Ｘ方向）と外層シート２１の構成繊維の配向方向とが実質的に一致している。そのため、外包材２の外観が優れ、特に外層シート２１からその内側の弾性部材（ウエスト弾性部材２４、胴回り弾性部材２３等）が視認されにくく、該弾性部材の隠蔽性が高い。   Moreover, in the composite elastic part 4 which forms the waist gather G2, and the composite elastic part 4 which forms the waistline gather G1, adjacent to the longitudinal direction of the absorptive main body 3, the multiple ridges 43 are in the elastic direction of the composite elastic part 4. The stretching direction (X direction) of the composite stretchable part 4 and the orientation direction of the constituent fibers of the outer layer sheet 21 substantially coincide with each other. Therefore, the outer appearance of the outer packaging material 2 is excellent, and in particular, the elastic members (the waist elastic member 24, the waistline elastic member 23, etc.) inside the outer layer sheet 21 are hardly visible, and the concealability of the elastic member is high.

以下、図１に示すパンツ型使い捨ておむつを連続的に生産する一製造方法について、図面を参照しながら説明する。図１０は、本製造方法の全容を示す斜視図である。図１１は、本製造方法のうち、複合伸縮部、非機能化領域及びレッグ弾性部材切断領域を形成する工程を中心として示す概念図である。図１２は、本製造方法のうち、複合伸縮部を形成する工程を中心として示す概念図である。   Hereinafter, one manufacturing method for continuously producing the pants-type disposable diaper shown in FIG. 1 will be described with reference to the drawings. FIG. 10 is a perspective view showing the entire manufacturing method. FIG. 11 is a conceptual diagram showing mainly the steps of forming the composite stretchable part, the non-functionalized region, and the leg elastic member cutting region in the present manufacturing method. FIG. 12 is a conceptual diagram showing mainly the step of forming the composite stretchable part in the present manufacturing method.

本製造方法は、図１０〜図１２に示すように、外層シート２１と内層シート２２とを接合部４１により接合して複合伸縮部４を形成する工程と、弾性部材２３，２６の収縮力を発現させなくして非機能化領域５１を形成する工程とを、同一のロール６２を用いて行っている。
本製造方法は、図１０に示すように、外層シート２１の連続体２１Ｓと内層シート２２の連続体２２Ｓとをその間に各弾性部材２３，２４，２５，２６の各連続体２３Ｓ，２４Ｓ，２５Ｓ，２６Ｓを挟持接合して、外包材２の連続体２Ｓを形成し、次に、外包材連続体２Ｓにおける内層シート連続体２２Ｓ側に吸収性本体３を本体接合部１５（図３参照）によって接合して、おむつ連続体１Ｓを形成し、次いで、おむつ連続体１Ｓを分断して個々のおむつ１を形成するパンツ型使い捨ておむつの製造方法である。 As shown in FIGS. 10 to 12, the manufacturing method includes a step of joining the outer layer sheet 21 and the inner layer sheet 22 by the joint portion 41 to form the composite stretchable portion 4, and the contraction force of the elastic members 23 and 26. The same roll 62 is used for the step of forming the non-functionalized region 51 without making it appear.
In this manufacturing method, as shown in FIG. 10, a continuous body 21S of the outer layer sheet 21 and a continuous body 22S of the inner layer sheet 22 are interposed between the continuous bodies 23S, 24S, 25S of the elastic members 23, 24, 25, 26. , 26S are sandwiched and joined to form a continuous body 2S of the outer packaging material 2, and the absorbent main body 3 is then attached to the inner layer sheet continuous body 22S side of the outer packaging material continuous body 2S by the main body joining portion 15 (see FIG. 3). It is the manufacturing method of the underpants type disposable diaper which joins and forms the diaper continuous body 1S, and then divides the diaper continuous body 1S and forms each diaper 1.

本製造方法について詳述する。外層シート２１の原反として外層シート連続体２１Ｓを使用し、内層シート２２の原反として内層シート連続体２２Ｓを使用する。
各弾性部材２３，２４，２５，２６の各連続体２３Ｓ，２４Ｓ，２５Ｓ，２６Ｓは、伸長された状態で、外層シート連続体２１Ｓと内層シート連続体２２Ｓとの間にそれらの長手方向に沿って導入される。 This manufacturing method will be described in detail. The outer layer sheet continuous body 21 </ b> S is used as the original sheet of the outer layer sheet 21, and the inner layer sheet continuous body 22 </ b> S is used as the original sheet of the inner layer sheet 22.
The continuous members 23S, 24S, 25S, and 26S of the elastic members 23, 24, 25, and 26 are stretched along the longitudinal direction between the outer layer continuous sheet 21S and the inner layer continuous sheet 22S. Introduced.

外層シート連続体２１Ｓは、その長手方向に沿って、その構成繊維が配向している。同様に、内層シート連続体２２Ｓもその長手方向に沿って、その構成繊維が配向している。本製造方法は、いわゆる横流れ方式でおむつ１を製造する。従って、本製造方法によって製造されるおむつ（製品）１における外包材２においては、複合伸縮部４の伸縮方向（幅方向）と、外層シート２１及び内層シート２２の構成繊維の配向方向が実質的に一致することになる。   In the outer layer continuous sheet 21S, the constituent fibers are oriented along the longitudinal direction. Similarly, the constituent fibers of the inner layer sheet continuous body 22S are oriented along the longitudinal direction. This manufacturing method manufactures the diaper 1 by what is called a transverse flow system. Therefore, in the outer packaging material 2 in the diaper (product) 1 manufactured by this manufacturing method, the expansion / contraction direction (width direction) of the composite expansion / contraction part 4 and the orientation direction of the constituent fibers of the outer layer sheet 21 and the inner layer sheet 22 are substantially different. Will match.

尚、図１１においては、前股間弾性部材２６の連続体２６Ｓの図示を省略している。外層シート連続体２１Ｓと内層シート連続体２２Ｓとが合流する前には、それぞれの対向面側に、接着剤塗工装置６４（図１１参照）等によって、所定の塗工位置にホットメルト型接着剤が塗工される。また、レッグ弾性部材２５の連続体２５Ｓは、揺動ガイド６５（図１１参照）によりレッグ開口部１３の形状に沿うように揺動されながら、外層シート連続体２１Ｓと内層シート連続体２２Ｓとの間に導入される。   In addition, in FIG. 11, illustration of the continuous body 26S of the front crotch elastic member 26 is abbreviate | omitted. Before the outer layer sheet continuum 21S and the inner layer sheet continuum 22S merge, the hot melt adhesive is bonded to a predetermined coating position by an adhesive coating device 64 (see FIG. 11) or the like on each facing surface side. The agent is applied. Further, the continuum 25S of the leg elastic member 25 is swung along the shape of the leg opening 13 by the swing guide 65 (see FIG. 11), while the outer layer sheet continuum 21S and the inner layer sheet continuum 22S. Introduced between.

両シート連続体２１Ｓ，２２Ｓは、各弾性部材連続体２３Ｓ，２４Ｓ，２５Ｓ，２６Ｓを挟んだ状態で、一対のニップロール６１，６１間で狭圧される。その結果、両シート連続体２１Ｓ，２２Ｓ間に各弾性部材連続体２３Ｓ，２４Ｓ，２５Ｓ，２６Ｓが挟持接合されてなる外包材連続体２Ｓが得られる。ここで、胴回り弾性部材２３は、吸収性本体３の側縁部近傍とサイドシール部１１との間となる領域においては、ホットメルト型接着剤によって接合されていない。同様に、ウエスト弾性部材２４は、一対のサイドシール部１１の間となる領域においては、ホットメルト型接着剤によって接合されていない。
この時点では、外包材連続体２Ｓには、複合伸縮部４、非機能化領域５１及びレッグ弾性部材切断領域５２は形成されていない。 Both sheet continuums 21S and 22S are compressed between the pair of nip rolls 61 and 61 with the elastic member continuums 23S, 24S, 25S, and 26S sandwiched therebetween. As a result, an outer packaging material continuum 2S is obtained in which the elastic member continuums 23S, 24S, 25S, and 26S are sandwiched and joined between the sheet continuums 21S and 22S. Here, the waistline elastic member 23 is not joined by the hot-melt adhesive in the region between the side edge portion of the absorbent main body 3 and the side seal portion 11. Similarly, the waist elastic member 24 is not joined by a hot melt adhesive in a region between the pair of side seal portions 11.
At this time, the composite stretchable part 4, the non-functionalized region 51, and the leg elastic member cutting region 52 are not formed in the outer packaging material continuous body 2S.

次に、複合伸縮部４等が形成されていない外包材連続体２Ｓは、複合伸縮部形成ロール６２とアンビルロール６３との間に導入される。複合伸縮部形成ロール６２は、その周面に、複合伸縮部４を形成する複合伸縮部形成部６２Ａを備えると共に、非機能化領域５１を形成する非機能化領域形成部６２Ａ及びレッグ弾性部材切断領域５２を形成するレッグ弾性部材切断領域形成部６２Ｃを備えている。
アンビルロール６３は複合伸縮部形成ロール６２の受けロールであり、その周面は平滑面となっている。 Next, the outer wrapping material continuous body 2 </ b> S in which the composite stretchable part 4 or the like is not formed is introduced between the composite stretchable part forming roll 62 and the anvil roll 63. The composite stretchable part forming roll 62 includes a composite stretchable part forming part 62A that forms the composite stretchable part 4 on its peripheral surface, and a non-functionalized region forming part 62A that forms the nonfunctionalized region 51 and leg elastic member cutting. A leg elastic member cutting region forming part 62 </ b> C that forms the region 52 is provided.
The anvil roll 63 is a receiving roll for the composite stretchable part forming roll 62, and its peripheral surface is a smooth surface.

複合伸縮部形成ロール６２の複合伸縮部形成部６２Ａには、複合伸縮部４の接合部４１に対応して多数のエンボスピン６２Ｄ（図１２参照）が設けられており、複合伸縮部形成部６２Ａによれば、複合伸縮部４が形成されていない外包材連続体２Ｓにおける複合伸縮部４に対応する領域に、接合部４１を形成することができる。エンボスピン６２Ｄは、ヒートエンボスピンでもよく、超音波エンボスピンでもよい。尚、図１２は、複合伸縮部４を形成する工程に密接した要素のみを抜き出して示す概念図である。従って、例えば、複合伸縮部形成ロール６２の周面には複合伸縮部形成部６２Ａのみを図示してあり、外包材連続体２Ｓについては複合伸縮部４のみを図示してある。   A plurality of embossed pins 62D (see FIG. 12) are provided in the composite stretchable part forming part 62A of the composite stretchable part forming roll 62 in correspondence with the joint part 41 of the composite stretchable part 4, and the composite stretchable part forming part 62A. According to this, the joining part 41 can be formed in the area | region corresponding to the composite expansion-contraction part 4 in the outer packaging material continuous body 2S in which the composite expansion-contraction part 4 is not formed. The emboss spin 62D may be a heat emboss spin or an ultrasonic emboss spin. FIG. 12 is a conceptual diagram showing only elements closely related to the process of forming the composite stretchable part 4. Therefore, for example, only the composite stretchable part forming part 62A is illustrated on the peripheral surface of the composite stretchable part forming roll 62, and only the composite stretchable part 4 is illustrated for the outer packaging material continuous body 2S.

そして、図１３に示すように、弾性部材４２（本製造方法では胴回り弾性部材２３、ウエスト弾性部材２４が該当する）を収縮させて両シート連続体２１Ｓ，２２Ｓのそれぞれに複数本の襞４３を形成させることにより、外包材連続体２Ｓの所定領域には、胴回りギャザーＧ１及びウエストギャザーＧ２を形成する複合伸縮部４が得られる。尚、図１３は、折り返し部２Ａの存在領域Ｈ以外の領域における複合伸縮部４を示す断面図である。   And as shown in FIG. 13, the elastic member 42 (it corresponds to the waist elastic member 23 and the waist elastic member 24 in this manufacturing method) is shrunk, and the plurality of ridges 43 are formed on each of the sheet continuous bodies 21S and 22S. By forming, the composite expansion-contraction part 4 which forms the waistline gather G1 and the waist gather G2 is obtained in the predetermined area | region of the outer packaging material continuous body 2S. FIG. 13 is a cross-sectional view showing the composite stretchable portion 4 in a region other than the region H where the folded portion 2A exists.

複合伸縮部形成ロール６２の非機能化領域形成部６２Ａは、弾性部材の収縮力を発現させなくする部位であり、外包材連続体２Ｓに非機能化領域５１を形成することができる。非機能化領域形成部６２Ａは、弾性部材を分断する多数の凸部やカッター刃、弾性部材を熱シールによって硬化させる多数のエンボスピン等から構成されている。   The non-functionalized region forming part 62A of the composite stretchable part forming roll 62 is a part that prevents the elastic member from contracting, and can form the nonfunctionalized region 51 in the outer packaging material continuous body 2S. The non-functionalized region forming part 62A is composed of a large number of convex portions and cutter blades that divide the elastic member, a large number of emboss pins that harden the elastic member by heat sealing, and the like.

複合伸縮部形成ロール６２のレッグ弾性部材切断領域形成部６２Ｃは、股下部Ｃの幅方向中央部となる位置に存するレッグ弾性部材連続体２５Ｓを切断する部位であり、レッグ弾性部材切断領域５２を形成することができる。レッグ弾性部材切断領域形成部６２Ｃは、例えば、多数の凸部やカッター刃から構成されている。レッグ弾性部材切断領域形成部６２Ｃによれば、レッグ弾性部材連続体２５Ｓを切断することにより、股下部Ｃの幅方向中央において幅方向に分離したレッグ弾性部材２５，２５を得ることができる。   The leg elastic member cutting region forming part 62C of the composite stretchable part forming roll 62 is a part for cutting the leg elastic member continuous body 25S existing at the position of the crotch part C in the center in the width direction. Can be formed. The leg elastic member cutting region forming part 62C is composed of, for example, a large number of convex parts and cutter blades. According to the leg elastic member cutting region forming portion 62C, the leg elastic members 25, 25 separated in the width direction at the center in the width direction of the crotch C can be obtained by cutting the leg elastic member continuous body 25S.

以上の構成を有する複合伸縮部形成ロール６２と、アンビルロール６３との間に、複合伸縮部４、非機能化領域５１及びレッグ弾性部材切断領域５２が形成されていない外包材連続体２Ｓを挿通させることにより、所定領域に複合伸縮部４、非機能化領域５１及びレッグ弾性部材切断領域５２が形成された外包材連続体２Ｓが得られる。   Between the composite stretchable part forming roll 62 having the above configuration and the anvil roll 63, the outer envelope material continuous body 2S in which the composite stretchable part 4, the non-functionalized area 51, and the leg elastic member cutting area 52 are not formed is inserted. By doing so, the outer packaging material continuous body 2S in which the composite stretchable part 4, the non-functionalized region 51, and the leg elastic member cutting region 52 are formed in a predetermined region is obtained.

前記実施形態のパンツ型使い捨ておむつ１は、複合伸縮部４、非機能化領域５１及びレッグ弾性部材切断領域５２が形成された外包材連続体２Ｓを用いて、それ以降の各工程を、従来のいわゆる横流れ方式のパンツ型使い捨ておむつの製造方法における各工程と同様に行うことにより、製造することができる。
例えば、図１０に示すように、外包材連続体２Ｓ上に、吸収性本体連続体３Ｓを切断して得た吸収性本体３を、それぞれ流れ方向に対して９０度回転させた後、本体接合部１５（図３参照）により間欠的に接合固定する。吸収性本体３の外包材連続体２Ｓへの固定は、外包材連続体２Ｓの伸長状態を維持したままで行う。換言すれば、外包材連続体２Ｓが複合伸縮部４等の収縮力により縮まないように維持しながら、吸収性本体３を固定する。 The pants-type disposable diaper 1 of the above embodiment uses the outer packaging material continuum 2S in which the composite stretchable part 4, the non-functionalized region 51, and the leg elastic member cutting region 52 are formed. It can manufacture by performing similarly to each process in the manufacturing method of what is called a cross-flow type underpants type disposable diaper.
For example, as shown in FIG. 10, the absorbent main body 3 obtained by cutting the absorbent main body continuous body 3 </ b> S on the outer packaging material continuous body 2 </ b> S is rotated 90 degrees with respect to the flow direction. The parts 15 (see FIG. 3) are joined and fixed intermittently. The absorbent main body 3 is fixed to the outer packaging material continuum 2S while maintaining the extended state of the outer packaging material continuum 2S. In other words, the absorbent main body 3 is fixed while maintaining the outer wrapping material continuous body 2 </ b> S so as not to shrink due to the shrinkage force of the composite stretchable part 4 or the like.

次に、図１２に示すように、外包材連続体２Ｓの両側部を、吸収性本体３の両端部を覆うように折り返して、吸収性本体３の両端部に外包材連続体２Ｓの両側部を固定した後、外包材連続体２Ｓを吸収性本体３と共に２つ折りする。外包材連続体２Ｓにおける折り返し部２Ａの存在領域Ｈとなる領域の内面側及び／又は該内面側に対向する内層シート連続体２２Ｓ、吸収性本体３等の所定位置には、予め接着剤を塗布しておく。   Next, as shown in FIG. 12, both sides of the outer packaging material continuum 2S are folded back so as to cover both ends of the absorbent main body 3, and both sides of the outer packaging material continuum 2S are formed at both ends of the absorbent main body 3. Then, the outer packaging material continuum 2S is folded in two with the absorbent main body 3. An adhesive is preliminarily applied to a predetermined position of the inner sheet side continuous body 22S, the absorbent main body 3 and the like facing the inner surface side and / or the inner surface side of the region where the folded portion 2A exists in the outer packaging material continuous body 2S. Keep it.

また、図１０及び図１１に示すように、ロータリーカッター、レーザーカッター等により、外包材連続体２Ｓからレッグ開口部形成用のトリム１３Ｓを除去して、おむつ連続体１Ｓを得る。
その後、おむつ連続体１Ｓをその幅方向（使い捨ておむつ１の長手方向）に折り返して２つ折りする。次いで、サイドシール部１１，１１を、ヒートシール、超音波シール、高周波シール等により形成した後、又はサイドシール部１１，１１を形成すると同時に、個々のおむつに分断することにより、前記実施形態のパンツ型使い捨ておむつ１を得ることができる。 Moreover, as shown in FIG.10 and FIG.11, the trim 13S for leg opening part formation is removed from the outer packaging material continuous body 2S with a rotary cutter, a laser cutter, etc., and the diaper continuous body 1S is obtained.
Then, the diaper continuous body 1S is folded back in the width direction (longitudinal direction of the disposable diaper 1) and folded in two. Next, after forming the side seal portions 11 and 11 by heat sealing, ultrasonic sealing, high frequency sealing or the like, or simultaneously with the formation of the side seal portions 11 and 11, the side seal portions 11 and 11 are divided into individual diapers. A pants-type disposable diaper 1 can be obtained.

このように得られた前記実施形態のパンツ型使い捨ておむつ１は、外包材２において、複合伸縮部４の伸縮方向（幅方向）と、外層シート２１及び内層シート２２の構成繊維の配向方向とが実質的に一致している。   The pants-type disposable diaper 1 of the embodiment obtained in this way has the expansion / contraction direction (width direction) of the composite stretchable part 4 and the orientation direction of the constituent fibers of the outer layer sheet 21 and the inner layer sheet 22 in the outer packaging material 2. It is substantially consistent.

吸収性本体３を９０度回転して外包材連続体２Ｓ上に間欠固定する方法としては、例えば、特開平４−１６６１５０号公報に記載の方法を用いることができる。また、吸収性本体３を外包材連続体２Ｓに固定する本体接合部１５（図３参照）は、吸収性本体３及び外包材連続体２Ｓの何れか一方又は両方に塗工しておくことができる。また、レッグ開口部形成用のトリム１３Ｓの除去は、外包材連続体２Ｓに吸収性本体３を固定する前に行うこともできる。   As a method of intermittently fixing the absorbent main body 3 by 90 degrees and intermittently fixing it on the outer packaging material continuum 2S, for example, a method described in JP-A-4-166150 can be used. Moreover, the main body joint portion 15 (see FIG. 3) for fixing the absorbent main body 3 to the outer packaging material continuous body 2S may be applied to one or both of the absorbent main body 3 and the outer packaging material continuous body 2S. it can. The trim 13S for forming the leg opening can be removed before the absorbent main body 3 is fixed to the outer packaging material continuous body 2S.

本製造方法によれば、外層シート２１と内層シート２２とを接合部４１により接合して複合伸縮部４を形成する工程と、弾性部材２３，２６の収縮力を発現させなくして非機能化領域５１を形成する工程とを、同一のロール６２を用いて行っているため、複合伸縮部４及び非機能化領域５１を備えたパンツ型使い捨ておむつを効率的に生産することができる。   According to this manufacturing method, the outer layer sheet 21 and the inner layer sheet 22 are joined by the joining part 41 to form the composite stretchable part 4, and the contraction force of the elastic members 23 and 26 is not expressed and the non-functionalized region Since the process of forming 51 is performed using the same roll 62, the underpants type disposable diaper provided with the composite expansion-contraction part 4 and the non-functionalization area | region 51 can be produced efficiently.

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制限されるものではない。
例えば、接着剤塗布部７０，７１は、前記実施形態のように平面視で直線状に制限されず、波線状であっても良い。また、接着剤塗布部７０，７１の数は、前記実施形態に制限されず、適宜設定可能である。
また、前記実施形態では、本発明の使い捨ておむつの適用例の一つとして予めパンツ型に成形されたパンツ型の使い捨ておむつを挙げたが、止着用のファスニングテープを具備する、いわゆる展開型の使い捨ておむつにも適用することができる。 As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment.
For example, the adhesive application portions 70 and 71 are not limited to a linear shape in plan view as in the above-described embodiment, but may be wavy. Further, the number of the adhesive application portions 70 and 71 is not limited to the above embodiment, and can be set as appropriate.
Moreover, in the said embodiment, although the underpants type disposable diaper previously shape | molded by the underpants type was mentioned as one of the application examples of the disposable diaper of this invention, what is called a deployment type disposable provided with the fastening tape of fixation. It can also be applied to diapers.

また、前記実施形態は、外包材２に複合伸縮部４が形成されていたが、複合伸縮部４は無くても良い。また、外包材２は、前記実施形態のように、別体の複数枚のシート（前記実施形態では外層シート２１及び内層シート２２）から構成されていなくても良く、１枚のシートから構成されていても良い。この場合、１枚のシートを折り曲げて相対向する２面を形成し、一方の面を構成する部分を外層シート２１、他方の面を構成する部分を内層シート２２とすることもできる。   In the embodiment, the composite stretchable part 4 is formed on the outer packaging material 2, but the composite stretchable part 4 may not be provided. Moreover, the outer packaging material 2 does not need to be composed of a plurality of separate sheets (in the embodiment, the outer layer sheet 21 and the inner layer sheet 22) as in the embodiment, and is composed of a single sheet. May be. In this case, it is also possible to fold one sheet to form two opposing surfaces, the part constituting one surface being the outer layer sheet 21 and the part constituting the other surface being the inner layer sheet 22.

また、複合伸縮部４は、股下部Ｃのギャザー（例えば、レッグギャザーＧ３、前股間ギャザーＧ４）にも適用することができる。股下部Ｃのギャザーを複合伸縮部４から形成した場合には、股下部Ｃのギャザーにおける複合伸縮部４の襞４３は、外包材２の長手方向に沿って、胴回りギャザーＧ１における複合伸縮部４の襞４３と連続していることが好ましく、レッグ開口部１３まで延びていることが更に好ましい。
また、複合伸縮部４における弾性部材４２の本数は、複合伸縮部４の寸法や用途に応じて適宜に決定し得るが、例えば５〜３０本とすることができる。また、接合部４１は、熱融着以外にも、超音波接合、ホットメルト型接着剤等の接着剤による接合によって形成することができる。しかし、接着剤による接合は、柔軟性や風合いの観点から、望ましくない。
また、接合部４１の配列パターンは適宜変更することができ、例えば千鳥状にすることもできる。また、接合部４１の形状は、矩形状、長円状、円状、菱形状等の適宜の形状とすることができる。 Moreover, the composite expansion-contraction part 4 is applicable also to the gathers (for example, leg gather G3, front crotch gather G4) of the crotch part C. When the gathers of the crotch part C are formed from the composite stretchable part 4, the heel 43 of the composite stretchable part 4 in the gathers of the crotch part C extends along the longitudinal direction of the outer packaging material 2, and the composite stretchable part 4 in the waistline gather G1. It is preferable that it is continuous with the heel 43 of the above, and it is more preferable that it extends to the leg opening 13.
Moreover, although the number of the elastic members 42 in the composite elastic | stretch part 4 can be determined suitably according to the dimension and application of the composite elastic part 4, it can be 5-30, for example. Further, the joining portion 41 can be formed by joining with an adhesive such as ultrasonic joining or hot-melt adhesive other than heat fusion. However, bonding with an adhesive is not desirable from the viewpoint of flexibility and texture.
In addition, the arrangement pattern of the joint portions 41 can be changed as appropriate, and can be, for example, staggered. Moreover, the shape of the junction part 41 can be made into appropriate shapes, such as a rectangular shape, an ellipse shape, a circular shape, and a rhombus shape.

図１は、本発明の使い捨ておむつの一実施形態を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the disposable diaper of the present invention. 図２は、図１に示す使い捨ておむつを展開し、伸長した状態を示す平面図である。FIG. 2 is a plan view showing a state in which the disposable diaper shown in FIG. 1 is developed and extended. 図３は、図２に示す使い捨ておむつの分解斜視図である。FIG. 3 is an exploded perspective view of the disposable diaper shown in FIG. 図４は、図２に示すＩ−Ｉ線断面を模式的に示す横断面図である。FIG. 4 is a cross-sectional view schematically showing a cross section taken along line II shown in FIG. 図５は、図１に示す使い捨ておむつの外包材の肌当接面側を示す展開平面図である。FIG. 5 is a developed plan view showing the skin contact surface side of the outer packaging material of the disposable diaper shown in FIG. 1. 図６は、図２に示すＩＩ−ＩＩ線断面を模式的に示す縦断面図である。6 is a longitudinal sectional view schematically showing a section taken along line II-II shown in FIG. 図７は、図１に示す使い捨ておむつの複合伸縮部を一部破断して示す斜視図である。FIG. 7 is a perspective view showing a composite stretchable part of the disposable diaper shown in FIG. 図８は、図７に示す複合伸縮部を伸長状態で示す平面図である。FIG. 8 is a plan view showing the composite stretchable part shown in FIG. 7 in an expanded state. 図９は、従来の使い捨ておむつを示す図６相当図である。FIG. 9 is a view corresponding to FIG. 6 showing a conventional disposable diaper. 図１０は、図１に示すパンツ型使い捨ておむつの一製造方法の全容を示す斜視図である。FIG. 10 is a perspective view showing the entire contents of one manufacturing method of the pants-type disposable diaper shown in FIG. 図１１は、図１０に示すパンツ型使い捨ておむつの製造方法のうち、複合伸縮部、非機能化領域及びレッグ弾性部材切断領域を形成する工程を中心として示す概念図である。FIG. 11 is a conceptual diagram centering on the steps of forming the composite stretchable part, the non-functionalized region, and the leg elastic member cutting region in the manufacturing method of the pants-type disposable diaper shown in FIG. 10. 図１２は、図１０に示すパンツ型使い捨ておむつの製造方法のうち、複合伸縮部を形成する工程を中心として示す概念図である。FIG. 12 is a conceptual diagram centering on the step of forming the composite stretchable part of the method for manufacturing the pants-type disposable diaper shown in FIG. 10. 図１３は、複合伸縮部の縦断面の部分拡大図で、（ａ）は伸長状態を示す図、（ｂ）は収縮し、襞が形成された状態を示す図である。FIGS. 13A and 13B are partially enlarged views of a longitudinal section of the composite stretchable portion, where FIG. 13A is a diagram showing an expanded state, and FIG.

符号の説明Explanation of symbols

１ 使い捨ておむつ
１１ サイドシール部
１２ ウエスト開口部
１２ａ ウエスト開口部周縁端
１３ レッグ開口部
２ 外包材
２Ａ 外包材の折り返し部
２Ａａ 外包材の折り返し部の先端部
２Ｂ 外包材の折曲部
２１ 外層シート
２１Ａ 外層シートの折り返し部
２１Ａａ 外層シートの折り返し部の先端部
２２ 内層シート
２２Ａ 内層シートの折り返し部
２３ 胴回り弾性部材
２４ ウエスト弾性部材
２５ レッグ弾性部材
２６ 前股間弾性部材
３ 吸収性本体
３ａ 吸収性本体の長手方向一端又は他端
３ｂ 吸収性本体の長手方向側縁
３０ 折曲線
３２ 表面シート
３３ 裏面シート
３４ 吸収性コア
４ 複合伸縮部
４１ 接合部
４２ 弾性部材
４３ 襞
５１ 非機能化領域
５２ レッグ弾性部材切断領域
７０，７１ 接着剤塗布部
Ｇ１ 胴回りギャザー
Ｇ２ ウエストギャザー
Ｇ３ レッグギャザー
Ｇ４ 前股間ギャザー
Ａ 腹側部
Ｂ 背側部
Ｃ 股下部
Ｄ 胴回り部
Ｅ 前股間部
Ｆ ウエスト部
Ｈ 折り返し部の存在領域 DESCRIPTION OF SYMBOLS 1 Disposable diaper 11 Side seal part 12 Waist opening part 12a Waist opening peripheral edge 13 Leg opening part 2 Outer packaging material 2A Outer packaging material folding | turning part 2Aa Outer packaging material folding part 2B Outer packaging material bending part 21 Outer layer sheet 21A Folding part 21Aa of outer layer sheet Folding part 22 of inner layer sheet Inner layer sheet 22A Folding part 23 of inner layer sheet waist elastic member 24 waist elastic member 25 leg elastic member 26 front crotch elastic member 3 absorbent main body 3a longitudinal length of absorbent main body One end or the other end 3b Longitudinal side edge 30 of the absorbent main body 30 Curved line 32 Top sheet 33 Back sheet 34 Absorbent core 4 Composite stretchable part 41 Joint part 42 Elastic member 43 襞 51 Non-functionalized area 52 Leg elastic member cutting area 70, 71 Adhesive application part G1 Girth gather G2 Waist gather G3 Leg gather G4 Front crotch gather A Abdominal side B Back side C Crotch part D Girth part E Front crotch part F Waist part H Folding area

Claims (7)

吸収性コアを含む縦長の吸収性本体と該吸収性本体の非肌当接面側に接合された外包材とを備え、該外包材が、該吸収性本体の長手方向両端それぞれから外方に延出する長さを有している使い捨ておむつであって、
前記外包材は、前記吸収性本体の長手方向両端から外方に延出する部分それぞれが、該吸収性本体の長手方向端縁より外方に位置し本体幅方向に延びる折曲線において、前記吸収性本体側に折り返されており、この外包材の折り返し部によって、該吸収性本体の長手方向両端部における肌当接面側が被覆されており、
前記折り返し部の存在領域における相対向する外包材間に、本体幅方向に延びる複数の線状の接着剤塗布部が、本体長手方向に間欠的に配されており、該接着剤塗布部を介して、該相対向する外包材間及び該折り返し部と前記吸収性本体との間がそれぞれ接合されており、
前記折り返し部の存在領域における相対向する外包材間に配されている複数の線状の前記接着剤塗布部は、該存在領域に存する前記吸収性本体の長手方向一端又は他端を境界として、本体長手方向の外方に位置する第１の接着剤塗布部と、内方に位置する第２の接着剤塗布部とを含んで構成されており、該第１の接着剤塗布部は、該存在領域における相対向する外包材間を接合しており、該第２の接着剤塗布部は、該折り返し部と該吸収性本体の長手方向両端部における肌当接面側との間を接合している使い捨ておむつ。 A vertically long absorbent main body including an absorbent core and an outer packaging material joined to the non-skin contact surface side of the absorbent main body, and the outer packaging material is outward from both longitudinal ends of the absorbent main body. A disposable diaper having a length to extend,
The outer wrapping material is configured such that each of the portions extending outward from both longitudinal ends of the absorbent main body is located outside the longitudinal edge of the absorbent main body and extends in the width direction of the main body. The skin contact surface side at both ends in the longitudinal direction of the absorbent main body is covered by the folded portion of the outer packaging material.
A plurality of linear adhesive applicators extending in the width direction of the main body are intermittently arranged in the longitudinal direction of the main body between the outer packaging materials facing each other in the region where the folded portion exists, and the adhesive applicator passes through the adhesive applicator. The opposing outer packaging materials and between the folded portion and the absorbent main body, respectively ,
The plurality of linear adhesive application portions disposed between the outer packaging materials facing each other in the region where the folded portion exists, with one end or the other end in the longitudinal direction of the absorbent main body existing in the region as a boundary, A first adhesive application part located outward in the longitudinal direction of the main body and a second adhesive application part located inward, the first adhesive application part comprising: The outer packaging materials facing each other in the existing region are joined, and the second adhesive application portion joins the folded portion and the skin contact surface side at both longitudinal ends of the absorbent main body. and are disposable diapers. 前記外包材が、外層シート、内層シート及び両シート間に配された複数本の弾性部材を含んで構成されており、該複数本の弾性部材それぞれは、その伸縮方向を本体幅方向に一致させて本体長手方向に間欠的に配されており、
少なくとも前記折り返し部の存在領域の近傍においては、前記外包材の幅方向両端部を除き、前記外層シートと前記内層シートとの間における隣り合う前記弾性部材間に、接着剤が実質的に塗布されていない請求項１記載の使い捨ておむつ。 The outer packaging material is configured to include an outer layer sheet, an inner layer sheet, and a plurality of elastic members disposed between the two sheets, and each of the plurality of elastic members has its expansion / contraction direction aligned with the body width direction. Are arranged intermittently in the longitudinal direction of the main body,
At least in the vicinity of the region where the folded portion is present, an adhesive is substantially applied between the adjacent elastic members between the outer layer sheet and the inner layer sheet except for both ends in the width direction of the outer packaging material. The disposable diaper of Claim 1 which is not. 前記外包材に複合伸縮部から形成されたギャザーが設けられており、該複合伸縮部は、前記外層シート及び前記内層シートが該複合伸縮部の伸縮方向及びそれに直交する方向において間欠的な接合部により互いに接合され、前記弾性部材が該接合部を通らないように配されると共に該弾性部材の両端部を除いた部分において該外層シート及び該内層シートに固定されておらず、該外層シート及び該内層シートそれぞれが各々複数本の該弾性部材に亘って連続して延びる複数本の襞を形成することにより構成されている請求項２記載の使い捨ておむつ。   The outer packaging material is provided with a gather formed from a composite stretchable portion, and the composite stretchable portion is formed by intermittently joining the outer layer sheet and the inner layer sheet in the stretch direction of the composite stretchable portion and in a direction perpendicular thereto. And the elastic member is arranged so as not to pass through the joint portion, and is not fixed to the outer layer sheet and the inner layer sheet except for both ends of the elastic member, and the outer layer sheet and The disposable diaper according to claim 2, wherein each of the inner layer sheets is formed by forming a plurality of ridges extending continuously over a plurality of the elastic members. 前記外層シート及び前記内層シートの何れも、前記吸収性本体の長手方向両端それぞれから本体長手方向の外方に延出する長さを有しており、且つ該外層シートの方が該内層シートよりも延出する長さが長い請求項２又は３記載の使い捨ておむつ。Each of the outer layer sheet and the inner layer sheet has a length extending outwardly in the longitudinal direction of the main body from each of the longitudinal ends of the absorbent main body, and the outer layer sheet is more than the inner layer sheet. The disposable diaper according to claim 2 or 3, wherein the extending length is long. 前記折り返し部は、前記外層シートの折り返し部と前記内層シートの折り返し部とから構成され、前記吸収性本体の長手方向両端部における肌当接面側は、該外層シートの折り返し部のみによって被覆され、該内層シートの折り返し部は、該吸収性本体の長手方向一端又は他端よりも本体長手方向外方に位置している請求項４記載の使い捨ておむつ。The folded portion is composed of a folded portion of the outer layer sheet and a folded portion of the inner layer sheet, and the skin contact surface side at both longitudinal ends of the absorbent main body is covered only by the folded portion of the outer layer sheet. The disposable diaper according to claim 4, wherein the folded portion of the inner layer sheet is located on the outer side in the longitudinal direction of the absorbent body relative to one or the other end in the longitudinal direction of the absorbent main body. 前記折曲線を含む前記外包材の折曲部が、４層以上の不織布の積層体を含んで構成されている請求項１〜５の何れか一項に記載の使い捨ておむつ。 The disposable diaper as described in any one of Claims 1-5 by which the bending part of the said outer packaging material containing the said bending curve is comprised including the laminated body of four or more layers of nonwoven fabrics. 前記折曲線を含む前記外包材の折曲部に、接着剤が実質的に塗布されていない請求項１〜６の何れか一項に記載の使い捨ておむつ。 The disposable diaper as described in any one of Claims 1-6 to which the adhesive agent is not substantially apply | coated to the bending part of the said outer packaging material containing the said bending curve.
JP2007295027A 2007-11-14 2007-11-14 Disposable diapers Active JP4971109B2 (en)

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