JP3545210B2 - Method for manufacturing elastic member - Google Patents

Method for manufacturing elastic member Download PDF

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JP3545210B2
JP3545210B2 JP19451398A JP19451398A JP3545210B2 JP 3545210 B2 JP3545210 B2 JP 3545210B2 JP 19451398 A JP19451398 A JP 19451398A JP 19451398 A JP19451398 A JP 19451398A JP 3545210 B2 JP3545210 B2 JP 3545210B2
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elastic body
adhesive portion
base sheet
adhesive
adhered
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JP2000026015A (en
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拓明 原田
公二 斉藤
和之 前田
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Kao Corp
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Kao Corp
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  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、弾性体が基材シート上に貼着されてなる伸縮性部材を製造するに際して基材シートに損傷を与えることなく弾性体のみを切断し得る伸縮性部材の製造方法に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
シート上に貼着された糸状又は帯状の弾性体を切断する方法としては、例えば特許第２７６１１６６号公報に記載の方法が知られている。この方法では、シートの弾性体貼着面側から該シートに向けて圧縮空気を噴出することにより、弾性体切断位置に相当するシートを、該シートの弾性体非貼着面側へ変位させ、該シートと該弾性体との間に間隙を形成した後、該弾性体を切断刃によって切断している。しかし、この方法では、切断箇所でシートを一旦停止させる必要がある等の理由により生産性を高くすることは容易でない。
【０００３】
また、特開昭６０−１５１３０１号公報には、封水性シートに貼着された帯状弾性体をヒートカッターを用いて非接着位置で切断するときに、該弾性体として該封水性シートよりも低い融点の材質で形成されたものを用い且つ該ヒートカッターの切断用加熱温度を低く設定することによって、該弾性体のみを切断する方法が記載されている。しかし、この方法には、溶融物がカッターに付着するという欠点及びシートで被覆された弾性体はカット出来ないという欠点があった。
【０００４】
従って、本発明は、弾性体が基材シート上に貼着された伸縮性部材を製造するに際して、基材シートに損傷を与えることなく弾性体のみを容易に且つ高速で切断し得る伸縮性弾性部材の製造方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明は、基材シート上に糸状又は帯状の弾性体が伸張状態で貼着されてなる伸縮性部材の製造方法であって、該基材シート上に該弾性体を接着部及び非接着部を有するように貼着し、次いで該基材シート及び該弾性体からなる該非接着部を加圧して、該非接着部の該弾性体のみを加圧切断する伸縮性部材の製造方法を提供することにより上記目的を達成したものである。
また本発明は、基材シート上に糸状又は帯状の弾性体が伸張状態で貼着されてなる伸縮性部材の製造方法であって、該基材シート上に該弾性体を接着部及び非接着部を有するように貼着し、次いで該非接着部の該弾性体のみを加圧切断する伸縮性部材の製造方法であって、
上記弾性体の上記基材シートへの貼着後に、被覆シートによって又は上記基材シートの折り返しによって該弾性体を被覆し、両シート間又は折り返された上記基材シート間に該弾性体を挟持・貼着した後に該非接着部の該弾性体のみを加圧切断する伸縮性部材の製造方法を提供することにより上記目的を達成したものである。
【０００６】
また、本発明は上記製造方法に用いられる好ましい装置として、基材シート上に糸状又は帯状の弾性体が伸張状態で貼着されてなる伸縮性部材の製造装置であって、長尺状の上記基材シート上に接着剤を間欠的に塗工して接着部及び非接着部をその長手方向に亘り交互に且つ規則的に形成する接着剤塗工部と、上記弾性体を伸張状態下に上記接着部を介して上記基材シート上に貼着する弾性体貼着部と、互いに対向する、加熱可能な平滑ローラ及び幅方向に一本又は二本以上の突条が設けられた加熱可能なロールカッターからなり、該突条が一本の場合、該ロールカッターの周長が、隣り合う上記非接着部間の距離と同じになされており、該突条が二本以上の場合、該ロールカッターにおける隣り合う該突条間の円弧長が、隣り合う上記非接着部間の距離と同じになされている弾性体切断部とを備えた伸縮性部材の製造装置を提供するものである。

【０００７】
また、本発明は基材シート上に、糸状又は帯状の弾性体を接着部及び非接着部を有するように貼着し、次いで該基材シート及び該弾性体からなる該非接着部を加圧して、該非接着部の該弾性体のみを加圧切断する弾性体の切断方法を提供するものである。

【０００８】
【発明の実施の形態】
以下、本発明の好ましい実施形態を、図面を参照しながら説明する。図１は、本発明に好ましく用いられる伸縮性部材の製造装置１を示す模式図であり、この製造装置１は接着剤塗工部Ａ、弾性体貼着部Ｂ、弾性体切断部Ｃ及び図示しない基材シート切断部を備えている。所定幅を有する長尺状の基材シート２は、図示しないロールから繰り出されて、矢印Ｄ方向に沿って接着剤塗工部Ａに搬送される。接着剤塗工部Ａでは、基材シート２の一面上に接着剤が塗付されて、接着部４が設けられる。接着部４は略矩形状をしており、基材シート２の左右両側部を除く幅方向全域に亘り且つその長手方向に関し所定の長さで規則的に設けられる。その結果、隣り合う２つの接着部４の間が非接着部５となる。接着部４の幅及び長さ並びに非接着部５の長さは、弾性体が貼着された基材シート２からなる伸縮性部材の用途に応じて適宜選択される。
【０００９】
接着剤塗工部Ａの下流側には弾性体貼着部Ｂが配されている。この弾性体貼着部Ｂにおいては、回転可能な円筒状の弾性体案内ローラ６が、その幅方向が基材シート２の搬送方向と直交するように配置されている。案内ローラ６は、その周面が基材シート２と当接するように配置されており、弾性体の接着部４への圧着ローラとして作用する。また、案内ローラ６には、その幅方向に所定間隔をおいて且つその円周方向に複数の案内溝７，７・・・が設けられている。図示しないロールから繰り出された複数の糸状又は帯状の弾性体８，８・・・は、伸張状態下に互いに平行になるように各案内溝７に案内される。そして弾性体８は、案内ローラ６による圧着で、接着部４を介して基材シート２上に貼着される。
【００１０】
弾性体貼着部Ｂの下流側には回転可能なターニングローラ９が配置されており、図示しないロールから繰り出された被覆シート１０が、このターニングローラ９に案内されて基材シート２に貼着された弾性体８上を被覆する。また、基材シート２の弾性体非貼着面側には、ターニングローラ９と対向するように回転可能な平滑ローラ１１が配置されており、これら２本のローラによる押圧によって、両シート間に弾性体８が挟持・貼着される。
【００１１】
ターニングローラ９の下流側には、弾性体切断部Ｃが配されている。この弾性体切断部Ｃにおいては、互いに異なる方向に回転している一対のローラ１２，１３が配置されており、弾性体８が貼着された基材シート２は、両ローラ１２，１３間に挿入される。これら２本のローラは何れも加熱可能であり、ロールカッター１２及び平滑ローラ（アンビルローラ）１３から成っている。そして、ロールカッター１２が被覆シート１０の側に配置され、平滑ローラ１３が基材シート２の側に配置されている。ロールカッター１２は、その幅方向に少なくとも１本（本実施形態においては１本）の突条１４が設けられている。突条１４の幅は接着部４の幅よりもやや大きく、またその上面は細長い矩形状の平面となっている。この上面の長さＷ〔図２（ａ）参照〕は一般に１．０〜５．０ｍｍであることが好ましい。また、ロールカッター１２における隣り合う突条間の円弧長は、隣り合う非接着部間の距離と同じになされている。本実施形態においては、上述の通り突条は１本のみ設けられているので、隣り合う突条間の円弧長はロールカッター１２の周長に等しい。即ち、本実施形態においては、ロールカッター１２の周長は、隣り合う非接着部５，５間の距離と同じになされている。
【００１２】
また、基材シートの搬送と両ローラ１２，１３の回転とは、ロールカッター１２における突条１４が平滑ローラ１３と対向すると同時に、基材シートの非接着部５が該突条１４と平滑ローラ１３との間に位置するように同期されている。その結果、突条１４と平滑ローラ１３との押圧によって非接着部５の弾性体８の加圧切断が行われる。
【００１３】
この切断の詳細について図２を参照しながら説明すると、先ず、図２（ａ）に示すように、両シート２，１０によって挟持・固定された弾性体８は矢印Ｄ方向に搬送される。このとき、ロールカッター１２及び平滑ローラ１３はそれぞれ所定温度に加熱されていてもよい。図２（ａ）に示す状態では、ロールカッター１２の突条１４と平滑ローラ１３とは対向しておらず、また、非接着部５は、ロールカッター１２の中心と平滑ローラ１３の中心とを結ぶ線上に達していない。
【００１４】
基材シートの搬送が更に進むと、図２（ｂ）に示すように、非接着部５がロールカッター１２の中心と平滑ローラ１３の中心とを結ぶ線上に達し、且つロールカッター１２の突条１４と平滑ローラ１３とが対向した状態となる。その結果、ロールカッター１２の突条１４と平滑ローラ１３との押圧により非接着部５が加圧及び必要に応じて加熱されて、非接着部５における弾性体８のみが切断される。弾性体８の切断は、非接着部５を長手方向に略二等分する線Ｓ（図１参照）上で行われるが、切断位置はこの位置に限られず、例えば非接着部５の前後端部のやや内側の位置であるＳ’やＳ”（それぞれ図１参照）の位置で切断が行われてもよい。上述の通り弾性体８は伸張状態で基材シート上に貼着されているので、上記の切断によって伸張状態下にあった弾性体８はその伸張状態が解放されて、切断位置からそれぞれ前後方向に収縮する。
【００１５】
上記の加圧切断における圧力は、弾性体及び基材シートの厚み、弾性体の本数並びに基材シートの搬送速度等にもよるが、一般に線圧で１００〜３０００Ｎ／ｃｍ、特に１０００〜２０００Ｎ／ｃｍとすることが好ましい。斯かる範囲で加圧することによって、基材シートに損傷を与えることなく弾性体８のみを一層容易に切断することができる。また、基材シートの搬送を止めることなく切断が行えるので生産性も向上する。
【００１６】
上記の切断に際しては、上述の通り、上記加圧と同時に、必要に応じて、ロールカッター１２及び／又は平滑ローラ１３の加熱により非接着部５を加熱してもよい。ロールカッター１２及び／又は平滑ローラ１３の加熱温度は、弾性体及び基材シートの材質、弾性体の本数並びに基材シートの搬送速度等にもよるが、一般に３０〜２５０℃、特に５０〜１５０℃とすることが好ましい。このような加熱を行うことで、非接着部５における弾性体８のみを一層高速で効果的に切断することができる。
【００１７】
基材シート２の搬送速度にも多少影響されるが、搬送速度が極端に速い場合を除き、加熱された非接着部５の温度はロールカッター１２及び／又は平滑ローラ１３の加熱温度とほぼ等しい。非接着部５の厳密な温度は、赤外線温度計等の測定装置を用いて測定することができる。
【００１８】
ロールカッター１２及び平滑ローラ１３を加熱する場合、その温度は同じでも異なっていてもよい。平滑ローラ１３の加熱温度は、基材シート２の損傷防止の点から、基材シート２の構成物質の融点付近またはそれ以下が好ましい。
【００１９】
本発明の弾性体の切断方法に用いられる基材シートとしては、織布、不織布、編物、フィルム及び紙等が用いられる。これらの構成材料としては各種合成樹脂、パルプなどの天然繊維及びレーヨンなどの再生繊維等が用いられる。基材シートの坪量は一般に１０〜５０ｇ／ｍ２ 、特に１５〜３０ｇ／ｍ２ であることが好ましい。
【００２０】
弾性体８としては、各種エラストマー樹脂が用いられる。用途にもよるが、弾性体８が糸状である場合、その太さは一般に１００〜１０００デニール、特に５００〜１０００デニールであることが好ましい。一方、弾性体８が帯状である場合、その厚みは一般に０．０１〜０．１ｍｍ、特に０．０２〜０．０５ｍｍであることが好ましい。
【００２１】
上述のようにして弾性体８のみが切断された基材シートは、弾性体８の切断に引き続く次工程である基材シート切断部（図示せず）において、公知の切断手段によって非接着部５の基材シートが切断されて毎葉の伸縮性部材が得られる。別法として、一旦巻き取られた後に、別工程において非接着部５の基材シートが公知の切断手段によって切断されて伸縮性部材となる。或いはそのまま加工され、最終製品の段階で公知の手段で切断される。尚、非接着部５の基材シートの切断は、得られる伸縮性部材の用途に応じて各非接着部５ごとに行われてよく、或いは以下に述べる図３に示す例のように幾つかの非接着部おきに規則的に行われてもよい。
【００２２】
このようにして得られた伸縮性部材１５は、例えば図３に示すように、使い捨ておむつ１６のウエスト部におけるトップシート１７とバックシート１８との間に固定されたウエスト部ギャザーとして用いられる。この伸縮性部材１５では各非接着部５において弾性体が切断されているが、基材シートは１個の非接着部５おきに切断されている。その結果、該ウエスト部ギャザーは間欠ギャザーを形成している。
【００２３】
本発明の範囲は上記実施形態に制限されず本発明の趣旨を逸脱しない範囲において種々の変更が可能である。
例えば、上記実施形態においては２枚の基材シートを用いたが、これに代えて基材シートを１枚のみ用いてもよい。この場合には、基材シートの弾性体貼着面側にロールカッター１２を配し、弾性体非貼着面側に平滑ローラ１３を配することが、弾性体８を効果的に切断し得る点から好ましい。
また、図４に示すように、１枚の基材シート２を用い、該基材シート２に弾性体８を貼着し、次いで該基材シート２をその長手方向に沿って折り返して（二つ折りして）該弾性体８上を被覆して、折り返された該基材シート２間に該弾性体８を挟持・貼着した後に、該弾性体８のみを切断してもよい。
また、ロールカッター１２の突条１４の形状は上述のものに限られず、例えば、突条１４の幅は接着部４の幅よりも小さくてもよく、或いは突条１４がロールカッター１２の幅方向に断続的に設けられていてもよい。突条１４をこのような形状とすることで任意の弾性体のみの切断が可能となり、得られる伸縮性部材に用途に応じた種々のバリエーションを付与することができる。
また、図１に示す切断装置１のロールカッター１２として２本以上の突条を設けたものを用いてもよい。
また、上記加圧切断を一層効果的に行うために、一対のヒートローラやオーブンヒータ等を用い、該加圧切断の前に非接着部５を所定温度に予備加熱してもよい。
【００２４】
【発明の効果】
本発明によれば、基材シートに損傷を与えることなく弾性体のみを容易に且つ高速で切断することができる。
また、複雑な装置が不要なので容易に且つ安価に切断を行うことができる。
また、ロールカッターの突条の形状を適宜変更することによって、任意の弾性体のみを切断できる。
【図面の簡単な説明】
【図１】本発明に好ましく用いられる伸縮性部材の製造装置１を示す模式図である。
【図２】図２（ａ）及び図２（ｂ）はそれぞれ弾性体の切断状態を示す模式図である。
【図３】本発明により得られた伸縮性部材を使い捨ておむつに適用した例を示す模式図である。
【図４】本発明の別の実施形態を示す模式図（図１相当図）である。
【符号の説明】
１ 伸縮性部材の製造装置
２ 基材シート
４ 接着部
５ 非接着部
８ 弾性体
１０ 被覆シート
１２ ロールカッター
１３ 平滑ローラ
１４ 突条[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a stretchable member that can cut only an elastic body without damaging a base sheet when manufacturing a stretchable member in which an elastic body is stuck on a base sheet.
[0002]
Problems to be solved by the prior art and the invention
As a method of cutting a thread-like or band-like elastic body stuck on a sheet, for example, a method described in Japanese Patent No. 2761166 is known. In this method, the sheet corresponding to the elastic body cutting position is displaced to the elastic body non-adhering surface side by ejecting compressed air toward the sheet from the elastic body attaching surface side of the sheet, After forming a gap between the sheet and the elastic body, the elastic body is cut by a cutting blade. However, in this method, it is not easy to increase the productivity because the sheet needs to be temporarily stopped at the cutting position.
[0003]
Also, Japanese Patent Application Laid-Open No. 60-151301 discloses that when a band-shaped elastic body attached to a water-sealing sheet is cut at a non-adhering position using a heat cutter, the elastic body is lower than the water-sealing sheet. A method of cutting only the elastic body by using a material formed of a material having a melting point and setting a low heating temperature for cutting of the heat cutter is described. However, this method has the disadvantage that the melt adheres to the cutter and that the elastic material covered with the sheet cannot be cut.
[0004]
Therefore, the present invention provides a stretchable elastic member that can easily and quickly cut only the elastic body without damaging the base sheet when manufacturing the elastic member in which the elastic body is stuck on the base sheet. An object is to provide a method for manufacturing a member.
[0005]
[Means for Solving the Problems]
The present invention is a method for producing a stretchable member in which a thread-like or band-like elastic body is adhered in an extended state on a base sheet, and the elastic body is formed on the base sheet with an adhesive portion and a non-adhesive portion. And a method for producing a stretchable member that presses the non-adhesive portion composed of the base sheet and the elastic body to cut only the elastic body of the non-adhesive portion under pressure. Thus, the above object has been achieved.
The present invention also relates to a method for producing a stretchable member in which a thread-like or band-like elastic body is adhered in an extended state on a base sheet, wherein the elastic body is bonded to the base sheet with a bonded portion and a non-bonded part. A method of manufacturing a stretchable member that is pressure-cut only by sticking the elastic body of the non-adhered portion,
After attaching the elastic body to the base sheet, cover the elastic body with a covering sheet or by folding the base sheet, and sandwich the elastic body between both sheets or between the folded base sheets. -The above object has been achieved by providing a method for producing a stretchable member in which only the elastic body of the non-adhered portion is pressure-cut after sticking.
[0006]
Further, the present invention is a preferable apparatus used in the above-mentioned manufacturing method, which is an apparatus for manufacturing a stretchable member in which a string-like or band-like elastic body is adhered in an extended state on a base material sheet. An adhesive-coated portion that intermittently coats an adhesive on a base sheet to form an adhesive portion and a non-adhesive portion alternately and regularly over its longitudinal direction, and that the elastic body is stretched. An elastic body sticking portion to be stuck on the base sheet via the bonding portion, and a heatable smooth roller opposed to each other and provided with one or two or more ridges in the width direction that can be heated. When the number of the ridges is one, the circumference of the roll cutter is the same as the distance between the adjacent non-adhesive portions, and when the number of the ridges is two or more, The arc length between the adjacent ridges in the roll cutter is different from the adjacent non-contact There is provided an apparatus for manufacturing a stretchable member having an elastic body cutting portion are made equal to the distance between the parts.

[0007]
Further, the present invention, on the substrate sheet, a thread-shaped or band-shaped elastic body is attached so as to have an adhesive portion and a non-adhesive portion, and then the non-adhesive portion made of the substrate sheet and the elastic material is pressed. Another object of the present invention is to provide a method for cutting an elastic body, which press-cuts only the elastic body of the non-adhesive portion .

[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing a manufacturing apparatus 1 for a stretchable member preferably used in the present invention. The manufacturing apparatus 1 includes an adhesive coating section A, an elastic body attaching section B, an elastic body cutting section C, and an illustration. Not provided with a base sheet cutting part. The long base sheet 2 having a predetermined width is unwound from a roll (not shown), and is conveyed to the adhesive coating section A along the direction of arrow D. In the adhesive application section A, an adhesive is applied on one surface of the base sheet 2 to provide an adhesive section 4. The bonding portion 4 has a substantially rectangular shape, and is provided regularly over the entire region in the width direction except for the left and right side portions of the base sheet 2 and at a predetermined length in the longitudinal direction. As a result, a non-adhesion portion 5 is formed between two adjacent adhesion portions 4. The width and length of the bonding part 4 and the length of the non-bonding part 5 are appropriately selected according to the use of the elastic member made of the base sheet 2 to which the elastic body is adhered.
[0009]
An elastic body sticking section B is disposed downstream of the adhesive coating section A. In this elastic body sticking section B, a rotatable cylindrical elastic body guide roller 6 is arranged so that the width direction thereof is orthogonal to the conveying direction of the base sheet 2. The guide roller 6 is arranged so that its peripheral surface is in contact with the base sheet 2, and acts as a pressure roller for the elastic body to the bonding portion 4. The guide roller 6 is provided with a plurality of guide grooves 7, 7,... At predetermined intervals in the width direction and in the circumferential direction. The plurality of thread-like or band-like elastic bodies 8, 8,... Drawn out from a roll (not shown) are guided by the respective guide grooves 7 so as to be parallel to each other in an extended state. Then, the elastic body 8 is stuck on the base sheet 2 via the bonding portion 4 by pressure bonding by the guide roller 6.
[0010]
A rotatable turning roller 9 is disposed downstream of the elastic body attaching portion B, and the covering sheet 10 fed from a roll (not shown) is guided by the turning roller 9 and adheres to the base sheet 2. The elastic body 8 is covered. In addition, a smooth roller 11 that can rotate so as to face the turning roller 9 is disposed on the elastic body non-sticking surface side of the base sheet 2, and is pressed between the two sheets by pressing by the two rollers. The elastic body 8 is pinched and adhered.
[0011]
An elastic body cutting portion C is disposed downstream of the turning roller 9. In the elastic body cutting portion C, a pair of rollers 12 and 13 rotating in directions different from each other are arranged, and the base sheet 2 on which the elastic body 8 is stuck is placed between the rollers 12 and 13. Inserted. Each of these two rollers is heatable and comprises a roll cutter 12 and a smooth roller (anvil roller) 13. Then, the roll cutter 12 is arranged on the side of the covering sheet 10, and the smooth roller 13 is arranged on the side of the base sheet 2. The roll cutter 12 is provided with at least one (in this embodiment, one) ridge 14 in the width direction. The width of the ridge 14 is slightly larger than the width of the bonding portion 4, and its upper surface is an elongated rectangular flat surface. The length W of the upper surface (see FIG. 2A) is generally preferably 1.0 to 5.0 mm. The arc length between adjacent ridges on the roll cutter 12 is the same as the distance between adjacent non-adhesive portions. In the present embodiment, since only one ridge is provided as described above, the arc length between adjacent ridges is equal to the circumferential length of the roll cutter 12. That is, in the present embodiment, the circumferential length of the roll cutter 12 is the same as the distance between the adjacent non-adhesive portions 5.
[0012]
The transfer of the base sheet and the rotation of the rollers 12 and 13 mean that the ridge 14 of the roll cutter 12 is opposed to the smooth roller 13 and that the non-adhesive portion 5 of the base sheet is 13 is synchronized. As a result, the elastic body 8 of the non-adhesive portion 5 is cut under pressure by the pressing between the ridge 14 and the smooth roller 13.
[0013]
The details of this cutting will be described with reference to FIG. 2. First, as shown in FIG. 2A, the elastic body 8 sandwiched and fixed between the sheets 2 and 10 is transported in the direction of arrow D. At this time, the roll cutter 12 and the smooth roller 13 may each be heated to a predetermined temperature. In the state shown in FIG. 2A, the ridge 14 of the roll cutter 12 and the smooth roller 13 are not opposed to each other, and the non-adhesion portion 5 connects the center of the roll cutter 12 and the center of the smooth roller 13. It has not reached the connecting line.
[0014]
When the transport of the base sheet further proceeds, as shown in FIG. 2B, the non-adhesive portion 5 reaches a line connecting the center of the roll cutter 12 and the center of the smooth roller 13, and the ridge of the roll cutter 12. 14 and the smoothing roller 13 face each other. As a result, the non-adhesive portion 5 is heated by pressing between the ridges 14 of the roll cutter 12 and the smooth roller 13 and, if necessary, is cut, so that only the elastic body 8 in the non-adhesive portion 5 is cut off. The cutting of the elastic body 8 is performed on a line S (see FIG. 1) that substantially bisects the non-adhesive portion 5 in the longitudinal direction, but the cutting position is not limited to this position. The cutting may be performed at the position of S ′ or S ″ (each shown in FIG. 1) which is a position slightly inside the portion. As described above, the elastic body 8 is attached to the base material sheet in the stretched state. Therefore, the elastic body 8 which has been in the expanded state by the above cutting is released from the expanded state, and contracts in the front-rear direction from the cutting position.
[0015]
The pressure in the pressure cutting described above depends on the thickness of the elastic body and the base sheet, the number of the elastic bodies, the conveying speed of the base sheet, and the like, but is generally 100 to 3000 N / cm in linear pressure, particularly 1000 to 2000 N / cm. cm is preferable. By applying pressure in such a range, only the elastic body 8 can be cut more easily without damaging the base sheet. Further, since the cutting can be performed without stopping the conveyance of the base sheet, the productivity is also improved.
[0016]
At the time of the cutting, as described above, simultaneously with the pressurization, the non-adhesive portion 5 may be heated by heating the roll cutter 12 and / or the smooth roller 13 as necessary. The heating temperature of the roll cutter 12 and / or the smoothing roller 13 depends on the materials of the elastic body and the base sheet, the number of the elastic bodies, the conveying speed of the base sheet, and the like, but is generally 30 to 250 ° C., particularly preferably 50 to 150 ° C. It is preferably set to ° C. By performing such heating, only the elastic body 8 in the non-bonded portion 5 can be cut more effectively at higher speed.
[0017]
The temperature of the heated non-adhesive portion 5 is substantially equal to the heating temperature of the roll cutter 12 and / or the smooth roller 13 except for a case where the transport speed is extremely high, though slightly affected by the transport speed of the base sheet 2. . The exact temperature of the non-bonded portion 5 can be measured using a measuring device such as an infrared thermometer.
[0018]
When heating the roll cutter 12 and the smooth roller 13, the temperatures may be the same or different. The heating temperature of the smoothing roller 13 is preferably around or below the melting point of the constituent material of the base sheet 2 from the viewpoint of preventing the base sheet 2 from being damaged.
[0019]
As the base sheet used in the method for cutting an elastic body of the present invention, a woven fabric, a nonwoven fabric, a knit, a film, a paper, or the like is used. As these constituent materials, various synthetic resins, natural fibers such as pulp, and recycled fibers such as rayon are used. The basis weight of the base sheet is generally 10 to 50 g / m 2 , particularly preferably 15 to 30 g / m 2 .
[0020]
As the elastic body 8, various elastomer resins are used. Although it depends on the application, when the elastic body 8 is in the form of a thread, its thickness is generally preferably 100 to 1000 denier, particularly preferably 500 to 1000 denier. On the other hand, when the elastic body 8 is in the shape of a band, the thickness is generally preferably 0.01 to 0.1 mm, particularly preferably 0.02 to 0.05 mm.
[0021]
The base sheet from which only the elastic body 8 has been cut as described above is cut into a non-adhesive section 5 by a known cutting means in a base sheet cutting section (not shown) which is the next step following the cutting of the elastic body 8. Is cut to obtain a stretchable member for each leaf. Alternatively, after being wound once, the base sheet of the non-adhesive portion 5 is cut by a known cutting means into a stretchable member in a separate step. Alternatively, it is processed as it is and cut by a known means at the stage of a final product. The cutting of the base sheet of the non-adhesive portion 5 may be performed for each non-adhesive portion 5 depending on the use of the obtained elastic member, or some of the cuts may be performed as shown in FIG. 3 described below. May be performed regularly at every non-adhesive portion.
[0022]
The elastic member 15 obtained in this manner is used as a waist gather fixed between the top sheet 17 and the back sheet 18 at the waist of the disposable diaper 16 as shown in FIG. 3, for example. In this stretchable member 15, the elastic body is cut at each non-adhesive portion 5, but the base sheet is cut every other non-adhesive portion 5. As a result, the waist gathers form intermittent gathers.
[0023]
The scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.
For example, in the above embodiment, two base sheets are used, but instead, only one base sheet may be used. In this case, arranging the roll cutter 12 on the elastic member sticking surface side of the base sheet and disposing the smooth roller 13 on the elastic member non-sticking surface side can effectively cut the elastic member 8. Preferred from the point.
Also, as shown in FIG. 4, one base sheet 2 is used, an elastic body 8 is adhered to the base sheet 2, and then the base sheet 2 is folded back along its longitudinal direction (2 The elastic body 8 may be cut off (only folded) after the elastic body 8 is covered, and the elastic body 8 is sandwiched and adhered between the folded base sheets 2.
In addition, the shape of the ridge 14 of the roll cutter 12 is not limited to the above-described one. For example, the width of the ridge 14 may be smaller than the width of the bonding portion 4 or the width of the ridge 14 in the width direction of the roll cutter 12. May be provided intermittently. By forming the ridge 14 in such a shape, it is possible to cut only an arbitrary elastic body, and it is possible to impart various variations to the obtained elastic member according to the application.
Further, as the roll cutter 12 of the cutting apparatus 1 shown in FIG. 1, a cutter provided with two or more ridges may be used.
In order to more effectively perform the pressure cutting, a non-adhesive portion 5 may be preheated to a predetermined temperature before the pressure cutting by using a pair of heat rollers, an oven heater, or the like.
[0024]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it can cut | disconnect only an elastic body easily and at high speed, without damaging a base material sheet.
Further, since a complicated device is unnecessary, cutting can be performed easily and at low cost.
Also, by appropriately changing the shape of the ridge of the roll cutter, only an arbitrary elastic body can be cut.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a stretchable member manufacturing apparatus 1 preferably used in the present invention.
FIGS. 2A and 2B are schematic views showing cut states of an elastic body, respectively.
FIG. 3 is a schematic view showing an example in which the elastic member obtained by the present invention is applied to a disposable diaper.
FIG. 4 is a schematic view (corresponding to FIG. 1) showing another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus of elastic member 2 Base sheet 4 Adhesive part 5 Non-adhesive part 8 Elastic body 10 Covering sheet 12 Roll cutter 13 Smooth roller 14 Protrusion

Claims (5)

基材シート上に糸状又は帯状の弾性体が伸張状態で貼着されてなる伸縮性部材の製造方法であって、該基材シート上に該弾性体を接着部及び非接着部を有するように貼着し、次いで該基材シート及び該弾性体からなる該非接着部を加圧して、該非接着部の該弾性体のみを加圧切断する伸縮性部材の製造方法。A method for producing a stretchable member in which a thread-like or band-like elastic body is adhered in an extended state on a substrate sheet, wherein the elastic body has an adhesive portion and a non-adhesive portion on the substrate sheet. A method for producing a stretchable member, wherein the non-adhesive portion composed of the base sheet and the elastic body is pressed, and then only the elastic body of the non-adhesive portion is cut under pressure. 上記基材シート上に上記接着部及び上記非接着部をそれぞれ設け、上記弾性体を該接着部を介して該基材シートに伸張状態で貼着し、次いで、該非接着部の該弾性体のみを加圧切断する請求項１記載の伸縮性部材の製造方法。The adhesive portion and the non-adhesive portion are respectively provided on the base sheet, the elastic body is attached to the base sheet in an extended state through the adhesive portion, and then only the elastic body of the non-adhesive portion is provided. 2. The method for producing an elastic member according to claim 1, wherein the cutting is performed under pressure. 基材シート上に糸状又は帯状の弾性体が伸張状態で貼着されてなる伸縮性部材の製造方法であって、該基材シート上に該弾性体を接着部及び非接着部を有するように貼着し、次いで該非接着部の該弾性体のみを加圧切断する伸縮性部材の製造方法であって、
上記弾性体の上記基材シートへの貼着後に、被覆シートによって又は上記基材シートの折り返しによって該弾性体を被覆し、両シート間又は折り返された上記基材シート間に該弾性体を挟持・貼着した後に該非接着部の該弾性体のみを加圧切断する伸縮性部材の製造方法。A method for producing a stretchable member in which a thread-like or band-like elastic body is adhered in an extended state on a substrate sheet, wherein the elastic body has an adhesive portion and a non-adhesive portion on the substrate sheet. A method for producing a stretchable member, which comprises applying pressure and then cutting only the elastic body of the non-adhered portion under pressure,
After attaching the elastic body to the base sheet, cover the elastic body with a covering sheet or by folding the base sheet, and sandwich the elastic body between both sheets or between the folded base sheets. A method for producing a stretchable member in which only the elastic body of the non-adhered portion is cut under pressure after being attached. 基材シート上に糸状又は帯状の弾性体が伸張状態で貼着されてなる伸縮性部材の製造装置であって、長尺状の上記基材シート上に接着剤を間欠的に塗工して接着部及び非接着部をその長手方向に亘り交互に且つ規則的に形成する接着剤塗工部と、上記弾性体を伸張状態下に上記接着部を介して上記基材シート上に貼着する弾性体貼着部と、互いに対向する、加熱可能な平滑ローラ及び幅方向に一本又は二本以上の突条が設けられた加熱可能なロールカッターからなり、該突条が一本の場合、該ロールカッターの周長が、隣り合う上記非接着部間の距離と同じになされており、該突条が二本以上の場合、該ロールカッターにおける隣り合う該突条間の円弧長が、隣り合う上記非接着部間の距離と同じになされている弾性体切断部とを備えた伸縮性部材の製造装置。An apparatus for manufacturing a stretchable member in which a thread-like or band-like elastic body is adhered in an extended state on a base sheet, and an adhesive is intermittently applied on the long base sheet. An adhesive coating portion that forms an adhesive portion and a non-adhesive portion alternately and regularly in the longitudinal direction thereof, and the elastic body is adhered to the base sheet via the adhesive portion in an extended state through the adhesive portion. The elastic body affixing portion, opposed to each other, is composed of a heatable smooth roller and a heatable roll cutter provided with one or two or more protrusions in the width direction, and when the protrusion is one, The circumferential length of the roll cutter is the same as the distance between the adjacent non-adhesive portions, and when the number of the ridges is two or more, the arc length between the adjacent ridges on the roll cutter is equal to the adjacent length. Elasticity with an elastic cutting part which is made the same as the distance between the non-adhered parts to be fitted Manufacturing apparatus member. 基材シート上に、糸状又は帯状の弾性体を接着部及び非接着部を有するように貼着し、次いで該基材シート及び該弾性体からなる該非接着部を加圧して、該接着部の該弾性体のみを加圧切断する弾性体の切断方法。On the base sheet, a thread-shaped or band-shaped elastic body is adhered so as to have an adhesive portion and a non-adhesive portion, and then the non-adhesive portion made of the base sheet and the elastic material is pressed to form An elastic body cutting method for cutting only the elastic body under pressure.
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CN105283157A (en) * 2013-08-20 2016-01-27 尤妮佳股份有限公司 Method for producing covered body for absorbent body of absorbent article, and device for producing same
CN105283157B (en) * 2013-08-20 2019-07-09 尤妮佳股份有限公司 The manufacturing method and manufacturing device of the nappe of the absorber of absorbent commodity

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