JP2004050486A

JP2004050486A - Laminating-bonding apparatus for integrated heat generating sheet and releasable sheet and laminating-bonding method using the same

Info

Publication number: JP2004050486A
Application number: JP2002208136A
Authority: JP
Inventors: Noriyasu Mizushima; 水島　紀恭
Original assignee: SANPO KAGAKU KK
Current assignee: SANPO KAGAKU KK
Priority date: 2002-07-17
Filing date: 2002-07-17
Publication date: 2004-02-19
Anticipated expiration: 2022-07-17
Also published as: JP4102128B2

Abstract

<P>PROBLEM TO BE SOLVED: To laminate and bond an integrated heat generating sheet and a releasable sheet by a pressure-sensitive adhesive and to properly punch a heat generating part to be wrapped in a succeeding die-cut process. <P>SOLUTION: The laminating-bonding apparatus for manufacturing a laminated and bonded sheet is constituted by opposedly arranging a first roll 1, which mutually bonds a long air permeable sheet a1 and a base sheet a2 and holding and covering the heat generating composition (h) arranged between the sheets a1 and a2 with a constant interval in the length direction of the sheets a1 and a2 and guiding a long integrated heat generating sheet A having a row H of the heat generating parts to be wrapped, and a second roll 2 for guiding the long releasable sheet B, with a desired clearance S3 between the rolls 1 and 2. A third roll 10 for guiding a long porous sheet K is provided with desired clearances S1 and S2 between the first and second rolls 1 and 2, and a pressure-sensitive adhesive supply head 3 for supplying the pressure-sensitive adhesive C to the gap between the third and second rolls 10 and 2 is provided. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、一体型発熱シートと剥離性シートの積層貼着装置並びにその積層貼着法に関する。
【０００２】
【従来の技術】
従来、発熱性貼着型製品を連続的に打ち抜き製造する製造装置の製造工程で使用される一体型発熱性シートと剥離性シートとを積層貼着する積層貼着装置とその積層貼着法を添付図面の図８〜図１１に基づいて説明する。
従来の装置は、長尺の一体型発熱性シートＡを案内する第１ロール１と長尺の剥離性シートＢを案内する第２ロール２とを、これら該一体型発熱性シートＡと該剥離性シートＢの夫々の厚さとこれらシートＡ，Ｂとの間に介在せしめる粘着剤Ｃの予定する厚さとを考慮して圧着するクリアランスＳを存して対向させて配設し、これら第１ロールと第２ロール２の上方に粘着剤供給ベルト３を配置して成るものである。
【０００３】
該一体型発熱性シートＡは、予め、前工程において次のようにして製造される。即ち、図９にその一部の拡大断面図に明示するように、長尺の不織布などの通気性シートａ１を移行させ乍ら、その上面に一定量の発熱性組成物ｈをそのシートａ１の長さ方向に一定の間隔〈ピッチ〉を存して配設した後、その上面に無孔又は不織布などの多孔性シートから成る長尺の基材シートａ２を重ね合わせ、これら上下シートａ１，ａ２を一体に結着し、該上下のシートａ１，ａ２間にその一定間隔〈ピッチ〉Ｄを存して、各発熱性組成物ｈが挟持被包された所望の一定形状の高さ０．５〜４ｍｍ程度の発熱性被包体部Ｈの多数個を一列に配設して構成したものである。その上下シートａ１，ａ２の一体結着は、通常、該長尺の該多孔性シートａ１の片面に予め施されたポリエチレンなどの熱可塑性合成樹脂フィルムｂ１と該長尺の基材シートａ２の片面に予め施されたポリエチレンなどの熱可塑性合成樹脂フィルムｂ２とを対面させ、ヒートシール装置を通過させて加圧熱融着させることによりなされる。尚、これらシートＡ，Ｂは、適当な同一の広幅を有することは言うまでもない。
また、前記装置の要部である加圧積層貼着部は、図１０の拡大側面図に明示のように、前記の対向する第１ロール１と第２ロール２との間に予め形成されるクリアランスＳは、第１ロール１により案内される一体型発熱性シートＡの該発熱性被包体部Ｈの厚さと第２ロール２により案内される剥離性シートＢの厚さとこれら該一体型発熱性シートＡと該剥離性シートＢの間に供給される粘着剤Ｃの塗工層の厚さの総和に対応する寸法に予め設定される。このクリアランスＳの寸法は、所望の寸法が得られるように、該第１ロール１に対し該第２ロールが前進、後退し、そのクリアランスＳの寸法を所望により調節できるような公知の機械的制御手段が、図示しないが、通常付設されている。
尚、該粘着剤供給ヘッド３としては、これに収容される粘着剤Ｃが組成物である場合は、例えば、流動性のゲル化組成物である場合は、ヘッド３としてその組成成分を混合するミキシングヘッドが使用される。
【０００４】
【発明が解決しようとする課題】
上記の積層貼着装置を用い、長尺の該一体発熱性シートＡと長尺の該剥離性シートＢとが積層貼着された長尺の発熱性積層貼着シートＰを製造する場合は、次のような不都合を伴う。
即ち、対設した第１ロール１と第２ロール２とを矢示のように回転させ、該第１ロール１と第２ロール２により該一体発熱性シートＡと該剥離性シートＢとを対向させ、上方から両ロール１，２間に導入するように移送させるようにする一方、同時に、このように移送される該一体発熱性シートＡと該剥離性シートＢの間に、その上方の該ヘッド３から、流動性ゲル化組成物などの粘着剤Ｃを連続的に吐出供給する。この場合、シートＡ，Ｂを該クリアランスＳを通過せしめて該第１ロール１と該第２ロール２により加圧し発熱性積層貼着シートＰが連続的に得られるように該クリアランスＳの上方のシートＡ，Ｂ間の谷間に、図示のように該粘着剤Ｃの溜りＣ′が常時生成するように、該ヘッド３から該流動性粘着剤Ｃが連続的に吐出されるようにする。
而して、図８及び特に図１０に明示するように、該第１ロール１により案内されて該クリアランスＳへ導入される一体発熱性シートＡの発熱性被包体部Ｈのないシート部ａ、即ち、各相隣る発熱性被包体部Ｈ，Ｈ間の各シート部ａでは、そのシート部ａと該第１ロール１の周面との間に該発熱性被包体部Ｈの高さに対応する空隙Ｇが形成されるので、前記の粘着剤の溜りＣ′の重圧や該溜りＣ′の外側に圧接している該第２ロール２の作用により、各該シート部ａは押されて、図示のように、該空隙Ｇ内へ弯曲してへこみ、そのへこんだ分、粘着物Ｃが余分に入り込んで来る。従って、該第１ロール１と該第２ロール２間の該クリアランスＳを通過して得られる発熱性積層貼着シートＬは、図８、特に図１１に明示するように、相互に貼着された該一体発熱性シートＡと該剥離性シートＢ間の粘着剤塗工層の全長に亘る厚さは不均一となる。すなわち、各発熱性被包体部Ｈがある部位では、所定の該クリアランスＳで定めた通りの粘着剤塗工層の厚さｔ_１が得られるが、該発熱性被包体部Ｈのない部位ａ′では、該一体発熱性シートＡが図示のように本来の所定の厚さｔ_１であるべき仮想線で示す位置より前記のように該シート部ａが該発熱性被包体部Ｈ，Ｈ間の間隙内に垂れ下がった分、粘着剤が充填され、その塗工層の厚さｔ_２は、所定の厚さｔ_１より厚くなり、それだけ粘着剤の使用量が無駄に消費され、製造コストが増大した不経済な積層貼着シートＬとして製造される不都合をもたらす。
更に、これに加え、次のような不都合をもたらす。即ち、該発熱性被包体部Ｈのない各シート部ａ、即ち、相隣る該発熱性被包体部Ｈ，Ｈ間のシート部ａは前記のようにたるむので、一体発熱性シートＡで定めた一定間隔で配設した積層貼着前の該各発熱性被包体部Ｈ，Ｈ間の一定の距離Ｄ、即ちピッチＤは、そのたるんだ分だけ短くなり、ピッチの寸法に狂いを生じ距離Ｄ′となり、該積層貼着シートＬに配置された夫々の該発熱性被包体部Ｈ，Ｈ，…間の距離〈ピッチ〉Ｄ′は僅かづつ短くなり、後のダイカット工程において配設したダイカットに対し、累積的な位置ずれを生ずる。従って、該第１ロール１と該第２ロール２を通過した該積層貼着シートＬは、その後引き続きニップロール４，４や案内ロール５などを介し牽引装置（図示しない）により前方へ移送され、次のダイカット工程で一対のダイカットロールを通し、一定の間隔を置いて１ショット毎その各一定形状の発熱性被包体部Ｈを次々とその所定形状に沿いその周囲を打ち抜き、発熱性貼着型パッド製品を次々と連続生産するが、このダイカット工程でその一定の外周面形状を有する各発熱性被包体部Ｈの周囲輪郭形状の通りの適正な打ち抜きが行われなくなり、しばしば不良製品をもたらす。
更には、該ダイカット工程で刃の入る各発熱性被包体部Ｈのないたるんだシート部分に比較的多量の粘着剤が塗工されているため、刃に粘着剤が付着し易く、ダイカットされた製品の抜けが悪く、また、刃の掃除が頻繁に必要となる。
更にまた、打ち抜かれた製品は、その周縁に本来の塗工厚さよりは肉厚のシート部が随伴してくるので、製品を端面から見た場合、商品価値が低下するなどの不都合を伴う。
本発明は、上記の従来の装置の課題を解決し、長尺の一体発熱性シートと長尺の剥離性シートを粘着剤を介して一対の案内ロールで加圧し互いに積層貼着したとき、発熱性被包体部のないシート部のたるみを生ずることなく、該シート部の粘着剤の塗工層の厚さは、発熱性被包体部と剥離性シート間の塗工層と実質上同じ厚さで発熱性被包体部のある部分とない部分とに関係なく均一な塗工層が得られると同時に、粘着剤の使用量を少なくして経済的な積層貼着シートが得られると共に、各発熱性被包体部間のピッチは、積層貼着前のピッチと変わらないので、所定の形状の各発熱性被包体部のダイカットによる一定間隔毎の打ち抜きをその一定形状の輪郭形状に沿い正確に行うことができ、商品価値を向上した一体発熱性シートと剥離性シートとの積層貼着装置とその積層貼着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】
上記従来の課題を解決した本発明の一体型発熱シートと剥離性シートの積層貼着装置は、長尺の通気性シートと長尺の基材シートとを互いに結着すると共に、そのシート間にその長さ方向において一定間隔を存して介在させた発熱性組成物を挟持被包して発熱性被包体部を少なくとも一列に配設して成る長尺の一体型発熱シートを案内する第１ロールと、長尺の剥離性シートを案内する第２ロールとを、所望のクリアランスを存して対向配設すると共に、該第１ロールとの間並びに該第２ロールとの間に夫々所望のクリアランスを存した位置に長尺の多孔性シートを案内する第３ロールを設け、且つ該第３ロール及び該第２ロール間に粘着剤を供給する粘着剤供給用ヘッドを設けたことを特徴とする。
更に本発明は、上記の装置を用いた上記の目的を達成した一体型発熱シートと剥離性シートの積層貼着法を提供するもので、該第３ロールにより案内される長尺の多孔性シートと該第２ロールにより案内される長尺の該剥離性シートとの間に、該粘着剤供給用ヘッドから粘着剤を供給し、該多孔性シートと該剥離性シートとの間に該粘着剤を連続的に供給し乍ら該第３ロールと該第２ロール間の該クリアランスを通過させ、粘着剤層を挟持した複合シートを形成した後、該複合シートと該第１ロールにより案内される一体型発熱シートとを、該第１ロールと該第２ロールとの間の該クリアランスを通過させて該多孔性シートを介して圧着し、積層貼着するようにしたことを特徴とする。
【０００６】
【作用】
該第３ロールにより案内された多孔性シートと該第３ロールと対向する第２ロールにより案内された剥離性シートとの間に粘着剤供給ヘッドから連続的に供給される粘着剤は、該第３ロールと該第２ロールとの回転により対向する両シートが両ロール間のクリアランスに導入通過する過程で、該両シートの移行に隋伴し、且つ両シートに連続的に挟まれて該クリアランスを通過したとき、両シートは粘着剤塗工層を挟持した状態の複合シートに形成された後、該複合シートは、その前方の、即ち、下方の対向する第１ロールと該第２ロール間の所定のクリアランス間に移行し、該第１ロールにより案内された一体型発熱性シートの基材シートの外面に、その該多孔性シート側で積層されると共に両ロールにより互いに圧着され、更に、その積層状態で該多孔性シートの微多孔を介し該粘着剤塗工層の一部は滲透し、該一体型発熱性シートの基材シートとの接着をもたらし、全体として全長に亘り実質上均一な粘着剤塗工層で互いに積層貼着された積層貼着シートが得られる。更に詳細には、この積層貼着工程において、該多孔性シートが該一体型発熱性シートと該粘着剤塗工層との間に介在しているので、一体型発熱性シートに一定の間隔〈ピッチ〉で配設された発熱性被包体部がないシート部は該第１ロールとの間に空隙が存するにも拘わらず、その空隙内へへこむことが防止され、当初の平坦な状態が確保される。また、かくして該発熱性被包体部のある個所と同じ厚さの肉薄の粘着剤塗工層が得られると同時に、該第１ロールと該第２ロールを通過して得られた積層貼着シートにおける該発熱性被包体部間の間隔〈ピッチ〉は、積層貼着前の一体型発熱性シートにおける間隔〈ピッチ〉と変わらないので、その後のダイカット工程において位置ずれがなく、各発熱性被包体部を適正な打ち抜きを連続的に行うことができ、外観上、体裁の良い商品価値を向上した発熱性貼着型製品が得られる。
【０００７】
【発明の実施の形態】
本発明の実施の形態例を、図１乃至図４に基づき説明するが、図示するその実施の１例の積層貼着装置において、上記従来の装置の構成部材と同じ構成部材は同じ参照符号を用いた。また、本発明の積層貼着法で用いられる一体型発熱性シート、剥離性シート及び粘着剤は、同じものを用いるので、同じ参照符号を用いて説明する。
【０００８】
図示の本発明の積層貼着装置は、一体型発熱性シートＡを案内する第１ロールと剥離性シートＢを案内する第２ロール２とを対向させて配設することは、従来装置の構成と変わりないが、その特徴構成は、多孔性シートＫを案内する第３ロール１０を該第１ロール１の上方に、該第１ロール１との間に該一体型発熱性シートＡを通過するに足る所望の寸法のクリアランスＳ１を存せしめると共に、該第２ロール２との間に所望の寸法のクリアランスＳ２を存せしめて配設し、その第３ロール１０と該第２ロール２の上方に、ミキシングヘッドなどの粘着剤供給ヘッド３を設けたことに在る。
【０００９】
該第３ロール１０と該第２ロール２との間のクリアランスＳ２の寸法は、貼着積層に使用されるべき、該一体型発熱性シートＡの厚さと該剥離性シートＢの厚さとこれらシートＡ，Ｂ間に介在せしめる粘着剤塗工層の厚さとの総和である。そのクリアランスＳ２の寸法の調節は、該第２ロール２及び該第３ロール１０のいずれか一方を他のロールに対し前進、後退動自在に可動し得る調節装置〈図示しない〉を付設することが好ましい。
また、該クリアランスＳ３の寸法は、該一体型発熱性シートＡの厚さと該多孔性シートＫの厚さと該剥離性シートＢの厚さと該シートＫ，Ｂ間に形成するべき所望の粘着剤塗工層に対応する厚さの総和である。そのクリアランスＳ３の寸法の調節は、該第１ロール１又は該第２ロール２のいずれか一方を前進、後退動せしめる調節装置〈図示しない〉を付設することにより行われる。
【００１０】
多孔性シートＫとしては、粘着剤が滲透するに適した無数の微多孔が開いた無機又は有機繊維から成る不織布や多孔性合成樹脂フィルムなどが使用され、その肉厚は、１０〜１０００μｍ程度の範囲の肉薄のものを使用することが一般である。
【００１１】
粘着剤Ｃとしては、ゴム系エラストマーやアクリル樹脂を主体とした粘着剤や架橋型の流動性ゲル化組成物などが選択使用される。
流動性ゲル化組成物としては、例えば、ポリアクリル酸ナトリウムなどの架橋剤、酒石酸などの架橋促進剤、グリセリンなどの潤滑剤、水分蒸発を防止する吸水性ポリマー、ベントナイトなどの保水剤及び精製水を夫々適宜の配合量で配合したものであり、架橋反応により保水粘着性ゲルとなるものである。また、身体の所要部を加熱する発熱性貼着型カイロ製品の他に、化粧用、医療用などの用途に応じ、美顔その他の美容用、医薬用などの発熱性貼着型パック製品を製造する場合には、このゲル化組成物に、その夫々の用途に応じた所望の材料を添加配合したものを使用する。例えば、香料、コラーゲンなどの老化防止剤、消臭剤などを添加配合する。
【００１２】
一体型発熱性シートＡの発熱性被包体Ｈ内に充填被包される発熱性組成物ｈとしては、代表的には、還元鉄粉又はアトマイズ鉄粉などの鉄粉を主体とし、これに活性炭、高吸水性樹脂粉、バーミキュライトなどの保水剤、塩化カルシウムなどの塩類及び水を適当に配合し、混合して成る発熱性混合粉体が使用される。
【００１３】
而して、上記本発明の装置を用い、以下のようにして本発明の積層貼着シートＬ′を製造する。
即ち、該第３ロール１０と該第２ロール２とを矢示のように互いに反対方向に回転させ、多孔性シートＫと剥離性シートＢとを、夫々のロール１０，２間のクリアランスＳ２に向かい導入移送する一方、該ミキシングヘッド３から上記の例えば流動性ゲル化組成物から成る粘着剤Ｃをそのロール１０，２の周面に沿い対向して導入移送されるこれらシートＫ，Ｂ２間に形成される谷間に粘着剤の溜りＣ′が常時生成するように連続的に供給する。かくして、該粘着剤Ｃは、移送されるシートＫ，Ｂに挟まれて、そのクリアランスＳ２を通過するとき、両シートＫ，Ｂ間に粘着剤塗工層Ｃが介在した複合シートＥが形成される。次いで、この複合シートＥを、引き続く移送によりその前方の、即ち、その下方の該第１ロール１と該第２ロール２間のクリアランスＳ３に移送される、そのクリアランスＳ３において、該複合シートＥは、矢示の方向に回転する第１ロール１により、前記の該第３ロール１０との間のクリアランスＳ１を通過して案内導入される該一体型発熱性シートＡの基材シートａ２の外面にその多孔性シートＫを介して積層されると共に、その積層シート全体は、該第１ロール１と該第２ロール２とにより加圧され乍ら該クリアランスＳ３を通過し、本発明の積層貼着シートＬ′が得られる。
一方、該積層シートは、クリアランスＳ３を通過し移行する過程において、該粘着剤塗工層Ｃの一部は、図４に矢示するように、該多孔性シートＫを滲透し、該一体型発熱性シートＡの基材シートａ２との結着をもたらす。
その後、引き続き、その下方の一対のニップロール４，４間を通過させ下方へ導き、更に案内ロール５を介し水平方向に移行させ、次の工程のダイカット工程に導くよう図示しない牽引装置により牽引され、そのダイカット工程で所定の一定間隔で配設したダイカットを具備した一対のダイカットローラーを通し、各発熱性被包体部Ｈを順次切り抜き発熱性貼着型製品を連続製造する。
【００１４】
このように、本発明によれば、該複合シートＥを作成した後、これをその多孔性シートＫを介して、該一体型発熱性シートＡに積層させたので、該一体型発熱性シートＡの該発熱性被包体部Ｈのない該包体部Ｈ，Ｈ間のシート部ａ（ａ１，ａ２）は、その各相隣る発熱性被包体部Ｈ，Ｈの空隙Ｇ内へへこみ弯曲されることが防止され、従って、図３及び図４に明示するように、該発熱性被包体部Ｈのあるところの厚さｔ_１は、該発熱性被包体部Ｈの部分である塗工厚さｔ_１と実質上同じ厚さｔ_１で得られるので、従来に比し、粘着剤の使用量が節約でき、而も該粘着剤塗工層の厚さは全長に亘り肉薄で且つ実質上均一であり、外観上体裁の良く、商品価値の向上した長尺の積層貼着シートＬ′をもたらす。また、該一体型発熱性シートＡの該発熱性被包体部Ｈのないシート部ａは、該包体部Ｈ，Ｈ間の間隙空間内に変位しないので、積層貼着後の各相隣る発熱性被包体部Ｈ，Ｈ間の距離Ｄは、積層貼着前の距離Ｄと変わらないので、その前方のダイカット工程時に、ダイカットによる一定間隔又は時間間隔による適正な打ち抜きが連続的に得られ、ロスのない発熱性貼着型パッドの連続生産が円滑に得られる。
【００１５】
図５は、前記の積層貼着シートＬ′から打ち抜かれて得られた１例の発熱性貼着型製品Ｐ１の上面図、図６は、図５のＶＩ−ＶＩ線断面図である。
【００１６】
図７は、他の実施例で得られた美顔用マスク型の発熱性貼着型製品Ｐ２を示す。該製品Ｐ２の発熱性被包体部Ｈは、シート部ａにより多数の小区劃に分割されて構成したもので、その使用に当たり、該剥離性シートＢを剥がして、その粘着剤塗工Ｃ面でその中央を顔の鼻に当て乍ら顔に貼着したとき、該発熱性包体部Ｈのないシート部ａで折り曲げ自由であるので、その多数の小区劃の発熱性被包体部Ｈ１，Ｈ２，…Ｈ６は、顔の曲面形状に密着し、使用中に発熱性組成物が発熱硬化したときでも、各区劃部Ｈは、顔面から容易に剥がれることなく、長期に亘り安定良好な加熱作用を維持することができる。
【００１７】
尚、長尺の一体型発熱性シートＡ、長尺の剥離性シートＢ、長尺の多孔性シートＫは夫々所望の幅を有するものが使用され、また、一定の間隔Ｄで一列に配設した発熱性被包体部Ｈ，Ｈ，…は、所望によりその幅方向に一定の間隔を存して長さ方向に同様に一列に配設し、複数列規則的に並んだ発熱性被包体部を具備せしめた長尺の一体型発熱性シートＡを、前工程で作製しておき、これを、同幅の長尺の剥離性シート、長尺の多孔性シートを用い、同様に本発明によりその積層貼着シートを製造するようにしてもよいことは言うまでもない。
【００１８】
【発明の効果】
上記から明らかなように、請求項１に係る発明により構成した積層貼着装置を用い、請求項２に係る発明の積層貼着方法を実施するときは、該一体型発熱性シートと該剥離性シートとの間に全長に亘り実質上同一厚さの肉薄の粘着剤塗工層が得られるので、粘着剤の使用量を節約できるばかりでなく、該発熱性被包体部間の当初の一定の距離〈ピッチ〉が保たれた長尺の積層貼着シートが得られるので、後のダイカット工程において、発熱性被包体部の打ち抜きを次々と適正に行うことができ、製造ロスのない連続生産をもたらし、且つ得られた発熱性貼着型製品の商品価値の向上をもたらす。
【図面の簡単な説明】
【図１】本発明の実施の１例の積層貼着装置とこれによる長尺の積層貼着シートの製造方法を説明する側面図。
【図２】該装置の要部の拡大側面図。
【図３】該装置により製造された長尺の積層貼着シートの一部の拡大断面模写図。
【図４】図３の一部の拡大断面模写図。
【図５】該長尺の積層貼着シートから所定形状の発熱性被包体部をその外周形状に沿い打ち抜かれた発熱性貼着型製品の１例の一部を裁除した平面図。
【図６】図５のＶＩ−ＶＩ線裁断面図。
【図７】本発明で製造された他例の長尺の積層貼着シートから所定形状の発熱性被包体部をその外周形状に沿い打ち抜かれた美顔用の発熱性貼着型製品の一部を裁除した平面図。
【図８】従来の積層貼着装置とこれによる長尺の積層貼着シートの製造方法を説明する側面図。
【図９】一体型発熱性シートの一部の断面模写図。
【図１０】該装置の要部の側面図。
【図１１】該装置で製造された長尺の積層貼着シートの一部分の拡大側面図。
【符号の説明】
１　第１ロール
２　第２ロール
３　粘着剤供給ヘッド
１０　第３ロール
Ａ　長尺の一体型発熱性シート
Ｂ　長尺の剥離性シート
Ｃ　粘着剤
Ｋ　多孔性シート
Ｌ′　本発明の積層貼着シート[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for laminating an integrated heat generating sheet and a releasable sheet and a method for laminating the same.
[0002]
[Prior art]
Conventionally, a laminating apparatus and a laminating method for laminating and laminating an integrated exothermic sheet and a releasable sheet used in a manufacturing process of a manufacturing apparatus for continuously punching and manufacturing exothermic laminating products are described. This will be described with reference to FIGS.
The conventional apparatus includes a first roll 1 for guiding a long integrated heat-generating sheet A and a second roll 2 for guiding a long peelable sheet B. In consideration of the respective thicknesses of the adhesive sheets B and the expected thickness of the adhesive C interposed between the sheets A and B, the first rolls are disposed facing each other with a clearance S for crimping. And an adhesive supply belt 3 disposed above the second roll 2.
[0003]
The integrated heat-generating sheet A is manufactured in advance in the preceding step as follows. That is, as shown in an enlarged cross-sectional view of a part of FIG. 9, a fixed amount of the heat-generating composition h is applied to the upper surface of the sheet a1 while transferring the air-permeable sheet a1 such as a long nonwoven fabric. After arranging at a certain interval <pitch> in the length direction, a long base sheet a2 made of a porous sheet such as a non-porous or non-woven fabric is overlaid on the upper surface thereof, and these upper and lower sheets a1, a2 And the heat generating composition h is sandwiched and wrapped with a predetermined height <0.5 between the upper and lower sheets a1 and a2. A large number of exothermic envelope portions H of about 4 mm are arranged in a row. The integral bonding of the upper and lower sheets a1 and a2 is usually performed by bonding a thermoplastic synthetic resin film b1 such as polyethylene previously applied to one surface of the long porous sheet a1 and one surface of the long base sheet a2. Is made by facing a thermoplastic synthetic resin film b2 of polyethylene or the like which has been applied in advance, passing through a heat sealing device, and heat-fusing under pressure. It is needless to say that these sheets A and B have the same suitable wide width.
In addition, the pressure laminating part, which is a main part of the apparatus, is formed in advance between the opposed first roll 1 and second roll 2 as clearly shown in the enlarged side view of FIG. The clearance S is determined by the thickness of the heat-generating envelope portion H of the integrated heat-generating sheet A guided by the first roll 1, the thickness of the peelable sheet B guided by the second roll 2, and the thickness of the integrated heat-generating sheet A. The size corresponding to the total thickness of the coating layer of the pressure-sensitive adhesive C supplied between the adhesive sheet A and the release sheet B is set in advance. The size of the clearance S is controlled by a known mechanical control such that the second roll advances and retreats with respect to the first roll 1 so that a desired size can be obtained, and the size of the clearance S can be adjusted as desired. Means are usually provided, though not shown.
When the pressure-sensitive adhesive C accommodated in the pressure-sensitive adhesive supply head 3 is a composition, for example, when the pressure-sensitive adhesive C is a fluid gelling composition, the composition components are mixed as the head 3. A mixing head is used.
[0004]
[Problems to be solved by the invention]
Using the above-mentioned laminating apparatus, when manufacturing a long heat-generating laminated sheet P in which the long integral heat-generating sheet A and the long peelable sheet B are laminated and bonded, It involves the following inconveniences.
That is, the opposing first roll 1 and second roll 2 are rotated as shown by the arrows, and the first heat-generating sheet A and the peelable sheet B are opposed by the first roll 1 and the second roll 2. And the sheet is transferred so as to be introduced between the two rolls 1 and 2 from above, and at the same time, between the integrated heat-generating sheet A and the peelable sheet B thus transferred, The pressure-sensitive adhesive C such as a fluid gelling composition is continuously discharged and supplied from the head 3. In this case, the sheets A and B are passed through the clearance S and pressurized by the first roll 1 and the second roll 2 so that the heat-generating laminated adhesive sheet P is continuously obtained. The fluid pressure-sensitive adhesive C is continuously discharged from the head 3 so that the pool C 'of the pressure-sensitive adhesive C is always generated as shown in the valley between the sheets A and B.
Thus, as clearly shown in FIG. 8 and particularly in FIG. 10, the sheet part a without the heat-generating envelope part H of the integral heat-generating sheet A guided by the first roll 1 and introduced into the clearance S. That is, in each sheet portion a between the adjacent heat-generating envelope portions H, H, the heat-generating envelope portion H is located between the sheet portion a and the peripheral surface of the first roll 1. Since the gap G corresponding to the height is formed, each sheet portion a is formed by the pressure of the pressure-sensitive adhesive pool C 'and the action of the second roll 2 pressed against the outside of the pool C'. As shown in the drawing, the adhesive C is bent and bent into the gap G, and the adhesive C is excessively inserted into the gap G. Therefore, the exothermic laminated adhesive sheets L obtained by passing through the clearance S between the first roll 1 and the second roll 2 are adhered to each other as clearly shown in FIG. 8, particularly FIG. The thickness of the pressure-sensitive adhesive coating layer between the integrated heat-generating sheet A and the peelable sheet B over the entire length becomes non-uniform. That is, in the site where there is the exothermic be the envelope portion H, the thickness t ₁ of the pressure-sensitive adhesive coating layer as defined in predetermined said clearance S is obtained, without said pyrogenic Hitsutsumitai portion H at location a ', the integral heating sheet a is the original predetermined thickness the sheet portion a as the from the position shown in phantom should be t ₁ is said pyrogenic Hitsutsumitai portion H as shown , H, the adhesive is filled to the extent that it hangs down, and the thickness t ₂ of the coating layer becomes thicker than the predetermined thickness t ₁ , so that the amount of the adhesive used is wasted and consumed. This leads to a disadvantage of manufacturing as an uneconomical laminated adhesive sheet L whose manufacturing cost has increased.
Further, in addition to the above, the following disadvantages are brought. That is, since each sheet portion a without the heat-generating envelope portion H, that is, the sheet portion a between the adjacent heat-generating envelope portions H, H sags as described above, the integrated heat-generating sheet A The constant distance D between the heat-generating encapsulating body parts H, H, which are arranged at a constant interval determined in the above, and before the lamination, ie, the pitch D, is shortened by the amount of the sag, and the pitch dimension is irregular. , And the distance <Pitch> D ′ between each of the heat-generating envelope portions H, H,... Disposed on the laminated adhesive sheet L is gradually reduced, and the distance D ′ is reduced in a later die cutting step. Cumulative displacement occurs with respect to the arranged die cut. Therefore, the laminated adhesive sheet L that has passed through the first roll 1 and the second roll 2 is subsequently transferred forward by a pulling device (not shown) via the nip rolls 4, 4 and the guide roll 5, and the like. In a die-cutting step, a pair of die-cut rolls are passed through, and at a fixed interval, each of the heat-generating wrapping portions H having a certain shape are punched out one by one along the predetermined shape for each shot, thereby forming a heat-generating adhesive die. Pad products are continuously produced one after another. However, in this die cutting process, appropriate punching is not performed according to the peripheral contour shape of each of the heat-generating envelope portions H having the constant outer peripheral surface shape, often resulting in defective products. .
Furthermore, since a relatively large amount of adhesive is applied to the loose sheet portion without each exothermic envelope portion H into which the blade enters in the die cutting step, the adhesive easily adheres to the blade, and the die cutting is performed. The product is not easily removed, and the blade needs to be cleaned frequently.
Furthermore, since the punched product is accompanied by a sheet portion having a greater thickness than the original coating thickness at the periphery thereof, when the product is viewed from the end face, there is a disadvantage that the commercial value is reduced.
The present invention solves the above-mentioned problems of the conventional apparatus, and when a long integrated heat-generating sheet and a long peelable sheet are laminated and adhered to each other by pressing with a pair of guide rolls via an adhesive. The thickness of the coating layer of the pressure-sensitive adhesive of the sheet portion is substantially the same as the thickness of the coating layer between the heat-generating envelope portion and the peelable sheet without causing sagging of the sheet portion without the heat-resistant envelope portion. At the same time, a uniform coating layer can be obtained regardless of the thickness of the heat-generating envelope portion and the portion without the heat-generating envelope portion, and at the same time, an economical laminated adhesive sheet can be obtained by reducing the amount of the adhesive used. Since the pitch between the heat-generating encapsulation portions is not different from the pitch before laminating, the punching of each heat-generating encapsulation portion having a predetermined shape at regular intervals by die cutting is performed in a contour shape of the predetermined shape. The integrated heat-generating sheet and the peeling And to provide the door with laminated sticking apparatus of the deposition process the laminate bonded.
[0005]
[Means for Solving the Problems]
The laminating apparatus of the integrated heat generating sheet and the peelable sheet of the present invention which has solved the above-mentioned conventional problems binds a long breathable sheet and a long base material sheet to each other, and between the sheets. A second guide that guides a long integrated heating sheet comprising a heat-generating composition sandwiched at predetermined intervals in the length direction and having a heat-generating envelope portion arranged in at least one line. One roll and a second roll for guiding a long peelable sheet are disposed to face each other with a desired clearance, and a desired roll is provided between the first roll and the second roll. Characterized in that a third roll for guiding a long porous sheet is provided at a position where the clearance exists, and an adhesive supply head for supplying an adhesive is provided between the third roll and the second roll. And
Further, the present invention provides a method for laminating and attaching an integrated heating sheet and a peelable sheet, which achieves the above-mentioned object using the above-mentioned apparatus, and comprises a long porous sheet guided by the third roll. And supplying the pressure-sensitive adhesive from the pressure-sensitive adhesive supply head between the elongate peelable sheet guided by the second roll, and the pressure-sensitive adhesive between the porous sheet and the peelable sheet. Is continuously passed through the clearance between the third roll and the second roll to form a composite sheet sandwiching the pressure-sensitive adhesive layer, and then guided by the composite sheet and the first roll. An integrated heat generating sheet is characterized in that the sheet is passed through the clearance between the first roll and the second roll, is pressed through the porous sheet, and is laminated and adhered.
[0006]
[Action]
The pressure-sensitive adhesive continuously supplied from the pressure-sensitive adhesive supply head between the porous sheet guided by the third roll and the peelable sheet guided by the second roll opposed to the third roll is the pressure-sensitive adhesive. In the process in which the two sheets facing each other due to the rotation of the three rolls and the second roll are introduced and passed through the clearance between the two rolls, the clearance between the two sheets is accompanied by the transition of the two sheets, and the two sheets are continuously sandwiched by the two sheets. After passing through, the two sheets are formed into a composite sheet sandwiching the pressure-sensitive adhesive coating layer, and then the composite sheet is located in front of, that is, between the first and second opposed lower rolls and the second roll. Between the predetermined clearance, the outer surface of the base sheet of the integrated heat generating sheet guided by the first roll, laminated on the porous sheet side and pressed together by both rolls, further, The product In this state, a part of the pressure-sensitive adhesive coating layer penetrates through the microporosity of the porous sheet to cause adhesion to the base sheet of the integrated heat-generating sheet, so that substantially uniform adhesion over the entire length is obtained. A laminated adhesive sheet laminated with the agent coating layer is obtained. More specifically, in the laminating step, since the porous sheet is interposed between the integrated heat-generating sheet and the pressure-sensitive adhesive coating layer, a certain distance < The sheet portion having no heat-generating envelope portion disposed at <pitch> is prevented from being depressed into the gap despite the presence of the gap between the sheet and the first roll, and the initial flat state is maintained. Secured. In addition, a thin pressure-sensitive adhesive coating layer having the same thickness as the place where the heat-generating envelope portion is provided is obtained, and at the same time, the laminated adhesive obtained by passing through the first roll and the second roll. Since the interval <pitch> between the exothermic encapsulating portions in the sheet is not different from the interval <pitch> in the integrated exothermic sheet before laminating, there is no displacement in the subsequent die cutting step, and each exothermic It is possible to continuously perform appropriate punching of the encapsulating body portion, and to obtain an exothermic adhesive product with good appearance and improved commercial value.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the illustrated laminating and sticking apparatus of one embodiment of the present invention, the same constituent members as those of the above-described conventional apparatus are denoted by the same reference numerals. Using. Further, since the same heat-generating sheet, peelable sheet and pressure-sensitive adhesive used in the laminating method of the present invention are the same, they will be described using the same reference numerals.
[0008]
In the illustrated laminating and sticking apparatus of the present invention, the first roll for guiding the integrated heat-generating sheet A and the second roll 2 for guiding the peelable sheet B are disposed so as to face each other. The characteristic structure is that the third roll 10 for guiding the porous sheet K is passed above the first roll 1 and between the first roll 1 and the integrated exothermic sheet A. A clearance S1 of a desired size that is sufficient and a clearance S2 of a desired size is disposed between the second roll 2 and the third roll 10 and above the second roll 2. And an adhesive supply head 3 such as a mixing head.
[0009]
The size of the clearance S2 between the third roll 10 and the second roll 2 is determined by the thickness of the integrated heat-generating sheet A, the thickness of the releasable sheet B, and the thickness of the sheet to be used for lamination. It is the sum of the thickness of the pressure-sensitive adhesive coating layer interposed between A and B. In order to adjust the size of the clearance S2, an adjusting device (not shown) capable of moving one of the second roll 2 and the third roll 10 forward and backward with respect to the other roll may be provided. preferable.
The dimensions of the clearance S3 are determined by the thickness of the integrated heat-generating sheet A, the thickness of the porous sheet K, the thickness of the releasable sheet B, and the desired adhesive coating to be formed between the sheets K and B. This is the sum of the thicknesses corresponding to the working layers. The dimension of the clearance S3 is adjusted by providing an adjusting device (not shown) for moving one of the first roll 1 and the second roll 2 forward and backward.
[0010]
As the porous sheet K, a nonwoven fabric or a porous synthetic resin film made of an inorganic or organic fiber with innumerable microporosity suitable for penetrating an adhesive is used, and its thickness is about 10 to 1000 μm. It is common to use a thin material in the range.
[0011]
As the pressure-sensitive adhesive C, a pressure-sensitive adhesive mainly composed of a rubber-based elastomer or an acrylic resin, a crosslinkable fluid gelling composition, or the like is selectively used.
Fluid gelling compositions include, for example, a crosslinking agent such as sodium polyacrylate, a crosslinking accelerator such as tartaric acid, a lubricant such as glycerin, a water-absorbing polymer for preventing water evaporation, a water retention agent such as bentonite, and purified water. Are blended in appropriate amounts, respectively, to form a water-retention adhesive gel by a crosslinking reaction. In addition to heat-generating adhesive cairo products that heat the required parts of the body, we manufacture heat-generating adhesive-type pack products for cosmetics, medical use, etc. In such a case, a gel composition obtained by adding and blending a desired material according to each use to the gel composition is used. For example, fragrances, anti-aging agents such as collagen, deodorants, etc. are added and blended.
[0012]
The exothermic composition h filled and encapsulated in the exothermic envelope H of the integrated exothermic sheet A is typically composed mainly of iron powder such as reduced iron powder or atomized iron powder. An exothermic mixed powder obtained by appropriately blending and mixing activated carbon, a superabsorbent resin powder, a water retention agent such as vermiculite, salts such as calcium chloride, and water is used.
[0013]
Thus, using the apparatus of the present invention, the laminated adhesive sheet L 'of the present invention is manufactured as follows.
That is, the third roll 10 and the second roll 2 are rotated in opposite directions as indicated by arrows, and the porous sheet K and the peelable sheet B are moved to the clearance S2 between the respective rolls 10 and 2. On the other hand, the pressure-sensitive adhesive C composed of, for example, the flowable gelling composition is transferred from the mixing head 3 between the sheets K and B2 which are guided and transferred along the peripheral surfaces of the rolls 10 and 2 while facing each other. The adhesive is continuously supplied so that a pool C 'of the adhesive is always generated between the formed valleys. Thus, when the adhesive C is sandwiched between the conveyed sheets K and B and passes through the clearance S2, a composite sheet E in which the adhesive coating layer C is interposed between the sheets K and B is formed. You. Next, the composite sheet E is transferred to a clearance S3 between the first roll 1 and the second roll 2 in front of the composite sheet E by a subsequent transfer, that is, below the composite sheet E. In the clearance S3, the composite sheet E , On the outer surface of the base sheet a2 of the integrated exothermic sheet A guided and introduced by passing through the clearance S1 between the first roll 1 and the third roll 10 by the first roll 1 rotating in the direction of the arrow. The laminated sheet is laminated via the porous sheet K, and the entire laminated sheet passes through the clearance S3 while being pressed by the first roll 1 and the second roll 2, and the laminated adhesive sheet according to the present invention. A sheet L 'is obtained.
On the other hand, in the process in which the laminated sheet passes through the clearance S3, a part of the pressure-sensitive adhesive applied layer C permeates the porous sheet K as shown by an arrow in FIG. The heat-generating sheet A is bonded to the base sheet a2.
Thereafter, the nip rolls are successively passed through a pair of nip rolls 4 and 4 therebelow, guided downward, further moved in a horizontal direction via guide rolls 5, and are pulled by a pulling device (not shown) so as to lead to the next die cutting step. In the die-cutting step, each heat-generating envelope part H is cut out sequentially through a pair of die-cut rollers provided with die-cuts arranged at predetermined regular intervals to continuously produce heat-generating adhesive products.
[0014]
As described above, according to the present invention, after the composite sheet E is formed, the composite sheet E is laminated on the integral heat generating sheet A via the porous sheet K. The sheet portions a (a1, a2) between the envelope portions H, H without the exothermic envelope portions H are dented into the gaps G of the adjacent exothermic envelope portions H, H. The thickness t ₁ where the exothermic envelope portion H is located is less than the thickness of the exothermic envelope portion H, as clearly shown in FIGS. 3 and 4. since coating is obtained with a thickness t ₁ and substantially the same thickness t _1, compared with the prior art, saves the amount of the adhesive, Thus the thickness of the even pressure sensitive adhesive coating layer over the entire length thin In addition, the present invention provides a long laminated adhesive sheet L 'which is substantially uniform, has a good appearance in appearance, and has an improved commercial value. Further, since the sheet portion a of the integrated heat generating sheet A without the heat generating envelope portion H is not displaced in the gap space between the envelope portions H, H, each adjacent portion after laminating and adhering. Since the distance D between the heat-generating encapsulation body portions H, H is not different from the distance D before lamination, proper punching at a constant interval or time interval by die cutting is continuously performed during the die cutting process in front of the portion. As a result, continuous production of the heat-generating adhesive pad without loss can be smoothly obtained.
[0015]
FIG. 5 is a top view of one example of the exothermic adhesive product P1 obtained by punching from the laminated adhesive sheet L ′, and FIG. 6 is a sectional view taken along line VI-VI of FIG.
[0016]
FIG. 7 shows a mask-type heat-generating adhesive product P2 for facial beauty obtained in another example. The exothermic envelope portion H of the product P2 is configured by being divided into a number of small sections by a sheet portion a. In use, the exfoliable sheet B is peeled off, and the pressure-sensitive adhesive-coated C surface When the sheet is affixed to the face while the center is applied to the nose of the face, the sheet can be folded freely by the sheet portion a without the heat-generating package portion H. , H2,..., H6 adhere to the curved surface of the face, and even when the exothermic composition is cured by heat during use, each section H is not easily peeled off from the face and has a stable and stable heating for a long period of time. The effect can be maintained.
[0017]
The long integrated heat-generating sheet A, the long peelable sheet B, and the long porous sheet K each having a desired width are used, and are arranged in a line at a constant interval D. Are arranged in a line in the length direction at a predetermined interval in the width direction as required, and the heat generation envelopes H, H, H,. A long integrated heat-generating sheet A having a body portion was prepared in the previous step, and this was formed using a long peelable sheet and a long porous sheet of the same width. It goes without saying that the laminated adhesive sheet may be manufactured according to the present invention.
[0018]
【The invention's effect】
As is clear from the above, when using the laminating apparatus constructed according to the first aspect of the present invention and performing the laminating method according to the second aspect, the integrated heat-generating sheet and the releasable Since a thin pressure-sensitive adhesive coating layer having substantially the same thickness over the entire length can be obtained between the sheet and the sheet, not only can the amount of the pressure-sensitive adhesive used be saved, but also the initial heat-generating envelope portion can be kept constant. A long laminated adhesive sheet maintaining the distance <pitch> can be obtained, so that in the subsequent die-cutting process, the heat-generating encapsulant can be punched out one after another, and continuous production without production loss This leads to production and an increase in the commercial value of the resulting exothermic adhesive product.
[Brief description of the drawings]
FIG. 1 is a side view for explaining a laminating apparatus according to an embodiment of the present invention and a method for producing a long laminating sheet using the laminating apparatus.
FIG. 2 is an enlarged side view of a main part of the device.
FIG. 3 is an enlarged cross-sectional schematic view of a part of a long laminated adhesive sheet manufactured by the apparatus.
FIG. 4 is an enlarged cross-sectional schematic view of a part of FIG. 3;
FIG. 5 is a plan view in which a part of an example of a heat-generating adhesive product obtained by punching a heat-generating encapsulant portion having a predetermined shape from the long laminated adhesive sheet along an outer peripheral shape thereof is cut away.
FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;
FIG. 7 shows an example of a heat-generating adhesive product for a face obtained by punching a heat-generating envelope of a predetermined shape from the other long laminated adhesive sheet manufactured according to the present invention along the outer peripheral shape thereof. The top view which cut out the part.
FIG. 8 is a side view for explaining a conventional laminating apparatus and a method for producing a long laminating sheet using the apparatus.
FIG. 9 is a schematic cross-sectional view of a part of the integrated heat generating sheet.
FIG. 10 is a side view of a main part of the device.
FIG. 11 is an enlarged side view of a part of a long laminated adhesive sheet manufactured by the apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st roll 2 2nd roll 3 Adhesive supply head 10 3rd roll A Elongated integrated heat generating sheet B Elongated peelable sheet C Adhesive K Porous sheet L 'The laminated adhesive sheet of this invention

Claims

長尺の通気性シートと長尺の基材シートとを互いに結着すると共に、そのシート間にその長さ方向において一定間隔を存して介在させた発熱性組成物を挟持被包して発熱性被包体部を少なくとも一列に配設して成る長尺の一体型発熱シートを案内する第１ロールと、長尺の剥離性シートを案内する第２ロールとを、所望のクリアランスを存して対向配設すると共に、該第１ロールとの間並びに該第２ロールとの間に夫々所望のクリアランスを存した位置に長尺の多孔性シートを案内する第３ロールを設け、且つ該第３ロール及び該第２ロール間に粘着剤を供給する粘着剤供給用ヘッドを設けたことを特徴とする一体型発熱シートと剥離性シートの積層貼着装置。A long air-permeable sheet and a long base material sheet are bound to each other, and the exothermic composition interposed at a certain interval in the length direction between the sheets is sandwiched and covered to generate heat. The first roll that guides a long integrated heat generating sheet having at least one row of the conductive encapsulating members arranged in at least one row, and the second roll that guides a long peelable sheet have a desired clearance. And a third roll for guiding the long porous sheet at a position where a desired clearance exists between the first roll and the second roll, and An apparatus for laminating and laminating an integrated heat generating sheet and a peelable sheet, comprising an adhesive supply head for supplying an adhesive between the three rolls and the second roll.

該第３ロールにより案内される長尺の多孔性シートと該第２ロールにより案内される長尺の該剥離性シートとの間に、該粘着剤供給用ヘッドから粘着剤を供給し、該多孔性シートと該剥離性シートとの間に該粘着剤を連続的に供給し乍ら該第３ロールと該第２ロール間の該クリアランスを通過させ、粘着剤層を挟持した複合シートを形成した後、該複合シートと該第１ロールにより案内される一体型発熱シートとを、該第１ロールと該第２ロールとの間の該クリアランスを通過させて該多孔性シートを介して圧着し、積層貼着するようにしたことを特徴とする一体型発熱シートと剥離性シートの積層貼着法。Supplying an adhesive from the adhesive supply head between the long porous sheet guided by the third roll and the long peelable sheet guided by the second roll; While continuously supplying the pressure-sensitive adhesive between the adhesive sheet and the peelable sheet, the pressure-sensitive adhesive was passed through the clearance between the third roll and the second roll to form a composite sheet sandwiching the pressure-sensitive adhesive layer. Thereafter, the composite sheet and the integrated heat generating sheet guided by the first roll are pressed through the porous sheet by passing through the clearance between the first roll and the second roll, A method of laminating an integrated heat generating sheet and a releasable sheet, the method comprising laminating and laminating.