JP3997464B2

JP3997464B2 - Adhesive handle

Info

Publication number: JP3997464B2
Application number: JP2001369307A
Authority: JP
Inventors: 幸雄豊田
Original assignee: 平紐工業株式会社
Priority date: 2001-10-30
Filing date: 2001-10-30
Publication date: 2007-10-24
Anticipated expiration: 2021-10-30
Also published as: JP2003137312A

Description

【０００１】
【発明の属する技術分野】
本発明は、商品買い物用紙袋とか商品等の入った段ボール箱その他の紙器に粘着、後付けして、これら紙器の手提げ運搬を可能にする粘着式取っ手であって、しかも該粘着式取っ手としての使用後における紙器と取っ手の分別廃棄、回収又はリサイクル使用のための剥離除去作業を容易にする構成を有する粘着式取っ手に関する技術分野に属する。
【０００２】
【従来の技術】
従来、紙器例えば紙袋とか段ボール箱等の運搬用粘着式取っ手は、ポリプロピレン製等の台紙の片面全面に塗布された粘着剤の表面に、ポリプロピレン製等の帯状手提げ紐を逆Ｕ字形状に曲げてその両端部を粘着固定し、更に該塗布面全面を覆う離型紙を貼着したものであり、離型紙を剥離除去し、被粘着対象物の紙器に粘着、固定されて使用されて来た。
【０００３】
例えば特開平３−７９２６号公報においては、ポリプロピレンを主原料とし、これに無機質充填材と少量の添加剤を配合してなる組成物を使用して二軸延伸フィルム成形法により製造した多層構造の合成紙が台紙として使用され、これにポリプロピレン製紐が前記同様に取り付けられた粘着式取っ手が開示されている。
【０００４】
一方、環境保全の観点から、取っ手付き紙袋等の使用後に不要になった時点における上記取り付けられた合成樹脂製粘着式取っ手の剥離除去の必要性が高くなり、紙袋とか段ボール箱等のセルロース系材料及び合成樹脂製取っ手の分別廃棄、分別回収、更には分別リサイクル使用技術が重要視されはじめた。
このような推移により、運搬用取っ手としての使用中はその役目上粘着力は高く、容易には剥離されず、取っ手としての用途が終わった時点では上記分別のために容易に剥離することのできる技術の出現が望まれてきた。
なお剥離、分離することなく全体を焼却処理することは、合成樹脂の高温下の焼却に基づく焼却炉の損傷を招き易く、この点からも紙器からの取っ手の容易な剥離除去処理技術の出現は重要視されて来た。
【０００５】
従来のこの取っ手の剥離除去作業の困難性に関する認識は、紙器への台紙の粘着、固定態様に起因するものではないかと考えられる。即ち、台紙の周囲全端縁は爪先とか剥離用ナイフ刃先が簡単には挿入できないほどに台紙全体が紙器に密着しており、このために上記手段では台紙の周囲全端縁には指先等に拠る剥離のための把持部分、例えば把持の容易な浮き上がり等が容易には得られなかったことにあったものと考えられる。
【０００６】
【発明が解決しようとする課題】
従って本発明の課題は、粘着式取っ手が紙器に粘着固定され、取っ手付き紙器として使用に供された後、例えば廃棄処分に付される場合、合成樹脂製の該粘着式取っ手の剥離除去作業のための指等による把持が容易な部分を構成することのできる粘着式取っ手を提供することにある。
【０００７】
【課題を解決するための手段】
本発明者は、上記課題を解決するためも鋭意研究をした結果、台紙の構成基材に熱変形温度が７０℃以上１３０℃以下である特定の再生ポリエステル（ポリエチレンテレフタレート）製シートを用い、粘着式取っ手を構成する台紙への粘着剤塗布にあたっては台紙の周辺部のうち少なくとも長辺部の一部に粘着剤の非塗布部を作り、該非塗布部の上記熱変形に基づく易把持部の構成により解決できることを見出し、本発明を完成するに至った。以下、本発明の要旨を述べる。
【０００８】
即ち本発明は、粘着剤が塗布された台紙の当該粘着剤部分に逆Ｕ字状に変形された帯状手提げ片の両端部分が粘着されてなり、前記粘着剤部分全体を覆うように離型紙が貼着され、該離型紙が剥離除去されて紙器に粘着貼付されて取っ手として使用される粘着式取っ手において、台紙はポリエステル製ボトル成形品が再成形用原料化されて使用されてなる、熱変形温度が７０〜１３０℃、厚みが５０〜２００μｍの押し出し成形アモルファスポリエステルシートで構成され、台紙への粘着剤の塗布は、台紙の周辺部のうち少なくとも長辺部の一部に２〜１０ｍｍの非塗布部を残した態様であり、該非塗布部は粘着式取っ手が紙器に粘着貼付されてなる状態下において７０℃〜１３０℃の加熱による変形現象により形成される、紙器からの台紙の剥離除去のための易把持部を構成する粘着式取っ手に関する。
【０００９】
【発明の実施の形態】
本発明に係る粘着式取っ手を構成する台紙には、後述の剥離除去時における易把持性付与等の観点から熱変形温度が７０〜１３０℃である、後述の特定のポリエステル製シートが使用される。
ここに言う熱変形温度とは実用的、外観的には加熱による該シートの平面性の喪失、具体的には波打ち曲面化、めくれ返り状曲面化、シート自由端縁部分の巻き込みによる円筒状曲面化等を実質的に起こし始める温度を指すが、熱変形温度の数値的表現のためには所定幅と長さを有する短冊形テストピースについて、その設定温度を可変状態とし、所定の静的荷重を加え、一定の時間の後、所定の伸度を得る温度を指し、具体的には１０ｍｍ幅、チャック間距離２００ｍｍのテストピースを使用し、２００ｇの荷重下に１分後に１０ｍｍの伸度を示す温度を指す。なお、サンプルの都合によってはチャック間距離１００ｍｍのテストピースも使用可能であるが、伸度はテストピースの長さに比例するからこの場合は５ｍｍの伸度を示す温度となることは言うまでもない。
【００１０】
本発明に係るアモルファスポリエステルは、ブロー成形（延伸ブロー成形を含む）用ポリエステルであり、より具体的にはポリエステルの分子量の調節、共重合成分の少なくとも一方を複数種使用したヘテロ共重合体化、異種ポリエステルのブレンド等の手段を用いて得たブロー成形用ポリエステル原料をブロー成形して得た容器をその目的に使用後、又は該成形中若しくは成形後に容器として使用するには至らなかったものを粉末化するなどして再成形用原料化して得られるアモルファスポリエステルを指し、プラスチックのリサイクル使用上又は廃棄に基づく環境破壊等の防止上好ましい原料と言える。
【００１１】
本発明において台紙に使用されるアモルファスポリエステル製シートに係るポリエステル原料としては、上記のごとく熱変形温度が７０〜１３０℃のものが使用される。下限温度が４０℃又は６０℃程度のものも使用しうる場合もあるが、年間の外気温、室温等を考慮すると、本発明に係る粘着式取っ手がその目的とする紙器への粘着力を保持しつつ、しかも台紙からの剥離除去を容易にする温度という観点からはやや不安な温度であり好ましくない。
【００１２】
本発明に係る紙器からの台紙の剥離除去という単純な作業の内容を考えると、精密高度な技術、高価な装置の使用は産業としては通常適しない。従って、前記アモルファスポリエステルの熱変形温度が１３０℃を超える高温熱変形性のポリエステルを使用して前記非粘着部分の熱変形を起こさせるには、例えば家庭にあるようなヘアードライアーのごとき簡易な熱風発生装置では達成でき難いので、該粘着式取っ手の剥離除去作業を簡単な作業として又は家内工業的に行うことは困難になり、産業として成り立ち難い。
【００１３】
なお、本発明において台紙の原料として使用される上記アモルファスポリエステルのシートは剛性が高いため、粘着式取っ手として紙器に貼着された後に該取っ手の台紙の粘着剤非塗布部分を把持して指で剥離除去する際、加熱変形させることなく直ちに該粘着剤非塗布部分の周辺部の自由端縁部と台紙の間に指を入れようとすると、該高剛性を有する該自由端縁が指に強く接触することは避けられず、往々にしてアモルファスポリエステルシートにより負傷（切り傷）することもあり、台紙の原料としてのシートをそのままの状態で剥離除去に付することには安全性の点で不安が存在する。
本発明はこのような不安を解消しようとするものであり、押し出し成形で得られたアモルファスポリエステルシートの長辺部である自由端縁部の少なくとも一部を前記適切な温度で加熱変形（具体的変形例としては、波打ち形状、めくれ上がり形状、熱収縮形状等）させて指先等に対する安全な易把持部を形成、提供するという、材料選択及び加熱変形という両面から構成された粘着式取っ手の提供と言える。
【００１４】
本発明に係る粘着式取っ手の台紙の厚さは特に限定されるものではいが、薄きに過ぎると紙器への粘着性台紙の貼着時における皺入り等の問題が起こり易く、取っ手として扱い難くなると共に、把手としての強度上問題が残り、逆に厚きに過ぎると粘着剤塗布等の加工作業性が悪くなるほか、薄い紙器に貼着使用した場合、台紙の粘着剤塗布部分とその周辺部分の紙器との間の剛性の差が大となり過ぎて該紙器の周辺部に破壊的応力が集中し、紙器の破損を招く恐れがあり好ましくない。これらの諸点から５０〜２００μｍのシートが最適である。
【００１５】
本発明に係る台紙への粘着剤の塗布は、台紙の一面の全面ではなくて前記熱変形による易把持部形成のための非塗布部を残した態様のものでなければならない。
易把持部を形成する粘着剤非塗布部分は、台紙の少なくとも一の隅に設けることでもその目的は達成できるが、連続生産においては断続的な特殊形状の塗布となるので全工程的にはこの態様は必ずしも効率的ではない。むしろ、長方形の台紙の少なくとも一辺に沿って非塗布部分を形成することが容易である。従って本発明においては、台紙には押し出し成形による長尺のアモルファスポリエステルシートから得られる長方形状のものが好ましく使用され、その長辺部の少なくとも一部を残し、その部分が非塗布部を構成する。
本発明に係る上記非塗布部の幅は２〜１０ｍｍの範囲が、取っ手として使用後の加熱作業性に加え、加熱変形による易把持部形成に最も効率的な幅である。
なお、上記長尺シートの長さ方向に沿っての粘着剤の部分的塗布等の加工手段には公知の各種手段が適宜使用できる。
【００１６】
なお、本発明において使用される粘着剤は特に限定されるものではないが、特定のポリエステル製シートからなる台紙と帯状手提げ片及び紙器との間において運搬物の荷重に耐える粘着強度を有することが必要であることは当然であり、ホットメルト型、非ホットメルト型、溶剤型、エマルジョン型等いずれの型の粘着剤であるかを問わず、公知の各種の粘着剤の中から適宜選択使用することができ、スチレン−イソプレン共重合体、スチレン−ブタジエン共重合体、ポリイソプレン等の合成ゴム系並びに天然ゴム系粘着剤、アクリル酸エステル−メタクリル酸エステル共重合体等のアクリル系粘着剤、エチレン−酢酸ビニル共重合体、エチレン−イソブチルアクリレート共重合体、ポリビニルエーテル系、ポリウレタン系、ポリアミド系等の各種粘着剤を例示することができる。
【００１７】
本発明に係る離型紙は、台紙の一面の粘着剤塗布部分全体を覆うように台紙に貼着される。この場合、離型紙は台紙の粘着剤塗布部分のみではなくて、粘着剤非塗布部分をも含めて、台紙の可及的全面を覆うように貼着されるのが好ましい。
【００１８】
本発明に係る粘着式取っ手が紙器に取り付けられた状態における台紙の非塗布部分の加熱変形方法としては特に限定されるものではないが、非塗布部分が可及的広く加熱されて台紙からの浮き上がりが広く、かつ大になるほど好ましい。
この観点から、熱風を例えばスリットから、台紙に平行に且つ粘着剤非塗布部に向かって噴出させると共に熱風を可及的多く台紙の粘着剤非塗布部と粘着対象物の紙器との間に吹き込ませ、熱変形に伴う台紙の粘着剤非塗布部を浮き上がりを推進させる方法が好ましい。もっとも上記のごとく台紙に平行な吹き付けが困難な場合は、該非塗布部分に垂直に吹き付けてもよい。
このような加熱により簡単に台紙の粘着剤非塗布部分は波状化、めくれ上がり化、該粘着剤非塗布部分の長辺部の熱収縮等による巻き込み円柱化又は円筒化等の変形を起こして指先による易把持部が形成される。
【００１９】
以下、本発明の実施例を示して本発明の効果について説明する。
【実施例１】
粘着式取っ手の台紙としては、ポリエチレンテレフタレートの中空成形で得られたボトルに商品の飲料水を入れて使用した後回収して粉砕したものを再成形用原料に供したものを使用した。ここに得られた再成形用原料のポリエステルは熱変形温度９０℃のアモルファスポリエステルであった。
該原料を使用して厚さ１２０μｍのシートを押し出し成形し、該シートから幅４１ｍｍ、長さ１８０ｍｍの短冊片を切り出して台紙用に供し、該台紙の長さ方向に沿う両長辺部には幅３ｍｍの粘着剤非塗布部を残し、スチレン−イソプレン共重合体を主成分とする粘着剤を塗布した。なお、粘着剤の塗布厚さは３０μｍであった。
この粘着剤塗布面に、全長３９０μｍ、幅１３ｍｍ、厚さ５００μｍの一軸延伸された発泡ポリプロピレン製帯状手提げ片を逆Ｕ字状に曲げてその両端部を粘着固定し、次に上記粘着剤非塗布部も含む台紙全面を覆う離型紙で被覆して粘着式取っ手を作成した。
続いて、上記取っ手の離型紙を除去し、その両端部分を段ボール箱の相対する側面の外面に貼着し、中に錘を収納して箱との合計荷重が７ｋｇとなるようにし、６時間宙吊り状態に保ったが、取っ手の剥離分離はなかった。
上記宙吊り実験の行われた取っ手付き箱の取っ手の粘着部分に、且つ該取っ手分に平行に、ヘアードライアーを用いて扁平な流れの９０℃の熱風を吹きつけた。この熱風の４０秒にわたる吹きつけにより台紙の粘着剤非塗布部分は、波打ちを伴うめくれ上がり変形を起こし、指先による把持部が形成され、該把持部を把持した状態で剥離を行ったところ、台紙は紙器から容易に１８０度剥離をすることができた。
【００２０】
【実施例２】
台紙の幅を８２ｍｍ、長さを２４０ｍｍとした以外は実施例１と同じ台紙を使用し、粘着剤の種類及び台紙への塗布態様も実施例１と同じとした。
又、帯状手提げ片は、台紙と同じ材質のアモルファスポリエステルであって、全長５４０ｍｍ、幅２０ｍｍ、厚さ１５０μｍの無延伸のものを使用した他は実施例１と同じ条件とした。
このような粘着式取っ手を使用し、合計荷重を１３ｋｇとした以外は実施例１と同様の宙吊り試験を行い、又台紙の剥離処理は実施例１と同様に行ったところ、実施例１と同様の結果を得た。
【００２１】
【比較例１】
台紙としては、二軸延伸ポリプロピレンを含む三層構造の合成紙（王子油化合成紙（株）の合成紙「ユポ」を使用）であって、厚さ１１０μｍ、幅４１ｍｍ、長さ１８０ｍｍのシートを使用し、粘着剤の種類及び塗布態様は実施例１と同じ条件とし、帯状手提げ片は実施例１で使用されたものと同じものを使用した。
実施例１と同じ荷重下の宙吊り試験をしたが、剥離異常はなかった。続いて粘着剤非塗布部分に、取っ手面に平行に１００℃の熱風を１分間、実施例１と同様に吹きつけたが、台紙の変形は起こらず、従って把持可能なめくれ上がり等の変形は全く見られなかった。
【００２２】
【比較例２】
台紙として、二軸延伸ポリプロピレンフィルムであって、厚さ６０μｍ、幅４１ｍｍ、長さ１８０ｍｍのものを使用し、粘着剤の種類及びその塗布態様は実施例１と同じとし、帯状手提げ片も実施例１と同様とし、実施例１と同様の宙吊り試験をしたが異常はなかった。続いて粘着剤非塗布部分に、比較例１同様に熱風を吹きつけたが、同様に台紙の変形は起こらず、従って把持可能なめくれ上がり等の変形は全く見られなかった。
【００２３】
【比較例３】
台紙として、二軸延伸処理のされたポリエステルを使用した以外は実施例１と同様とし、粘着剤の種類及び塗布態様も実施例１と同様とし、又帯状手提げ片の材質、サイズ共に実施例１と同じ条件とし、実施例１と同様の宙吊り試験をしたが、粘着状態に異常変化は見られなかった。
更に、実施例１の場合同様に熱風を吹きつけたが、台紙の粘着剤非塗布部分に何ら変形が起こらず、手提げ片の剥離処理のための把持を容易にする変形は全く見られなかった。
【００２４】
【比較例４】
台紙としては比較例１同様の二軸延伸ポリプロピレンを含む多層構造のユポ（商品名）であって、厚さ１３０μｍ、幅４１ｍｍ、長さ１８０ｍｍのサイズのものを使用した以外、比較例１と同様とした。帯状手提げ片は実施例１と同じものを使用した。
粘着剤の種類及び非塗布部分の態様も比較例１と同様とした。その結果、比較例３同様に把持部分の形成ができなかった。
【００２５】
【発明の効果】
以上の詳細な説明、特に実施例、比較例から明らかなように、ブロー成形に利用されたアモルファスポリエステルが再成形用原料化され、押し出し成形されたシートであって、熱変形温度が７０〜１３０℃、厚みが５０〜２００μｍのポリエステルシートを台紙として使用した粘着式取っ手において、長方形の該台紙に粘着剤を塗布するにあたり、該長方形の長辺部に沿って、その少なくとも一部に粘着剤非塗布部分を形成した状態の取っ手を紙器に粘着貼付することにより、該非塗布部分が加熱変形に現象に基づく、紙器からの台紙等の剥離除去のための易把持部を構成し得て紙器と把手との剥離、除去、分離が容易になるという効果を得た。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adhesive handle that can be attached and retrofitted to a cardboard box or other paper container containing merchandise shopping paper bags or products, etc., and enables the paper containers to be carried by hand, and used as the adhesive handle The present invention belongs to a technical field related to an adhesive handle having a configuration that facilitates a separation and removal operation for later disposal, collection, or recycling of paper containers and handles.
[0002]
[Prior art]
Conventionally, adhesive handles for transporting paper containers such as paper bags and cardboard boxes have been made by bending a belt-like hand strap made of polypropylene into an inverted U shape on the surface of an adhesive applied to the entire surface of one side of a mount made of polypropylene or the like. The both ends are adhered and fixed, and a release paper covering the entire coated surface is further adhered. The release paper is peeled and removed, and has been used after being adhered and fixed to a paper container of an object to be adhered.
[0003]
For example, in JP-A-3-7926, a multilayer structure produced by a biaxially stretched film molding method using a composition comprising polypropylene as a main raw material and an inorganic filler and a small amount of additives added thereto. An adhesive handle is disclosed in which synthetic paper is used as a mount, and a polypropylene string is attached to the same as described above.
[0004]
On the other hand, from the viewpoint of environmental conservation, the necessity of peeling and removing the attached synthetic resin adhesive handle when it is no longer necessary after use, such as a paper bag with a handle, is increased. Cellulosic materials such as a paper bag or a cardboard box In addition, separation and collection of synthetic resin handles, separation and collection, and separation and recycling technology have begun to be emphasized.
Due to such transition, the adhesive strength is high during use as a handle for transportation, it is not easily peeled off, and can be easily peeled off for the above-mentioned separation when the use as a handle ends. The advent of technology has been desired.
Incineration of the whole without separation and separation is likely to cause damage to the incinerator based on incineration of synthetic resin at high temperatures. From this point of view, the emergence of technology for easy removal and removal from paper containers It has been emphasized.
[0005]
It is considered that the conventional recognition regarding the difficulty in removing and removing the handle is caused by the sticking and fixing of the mount to the paper container. That is, the entire edge of the mount is in close contact with the paper container so that the tip of the toe or the peeling knife edge cannot be easily inserted. It is considered that the gripping part for the separation to be relied upon, for example, easy lifting of gripping, etc. was not easily obtained.
[0006]
[Problems to be solved by the invention]
Therefore, the problem of the present invention is that when the adhesive handle is adhesively fixed to a paper container and used as a paper container with a handle, for example, when it is subjected to disposal, the adhesive handle made of synthetic resin is peeled and removed. An object of the present invention is to provide an adhesive handle that can constitute a portion that can be easily held by a finger or the like.
[0007]
[Means for Solving the Problems]
As a result of earnest research to solve the above problems, the present inventor used a specific recycled polyester (polyethylene terephthalate) sheet having a thermal deformation temperature of 70 ° C. or higher and 130 ° C. or lower as a base material of the mount, In the application of the adhesive to the mount constituting the type handle, a non-applied part of the adhesive is formed on at least a part of the long side of the periphery of the mount, and the structure of the easy gripping part based on the thermal deformation of the non-applied part As a result, the present invention was completed. Hereinafter, the gist of the present invention will be described.
[0008]
That is, according to the present invention, both end portions of the strip-shaped hand-shaped piece deformed in an inverted U shape are adhered to the adhesive portion of the backing sheet coated with the adhesive, and the release paper is covered so as to cover the entire adhesive portion. In the adhesive type handle that is attached and peeled and removed from the release paper and then used as a handle by sticking it to a paper container, the mount is made by using a polyester bottle molded product as a raw material for re-molding. It is composed of an extrusion-molded amorphous polyester sheet having a temperature of 70 to 130 ° C. and a thickness of 50 to 200 μm, and the adhesive is applied to the mount on a part of the long side of at least a part of the long side of the mount. It is a mode in which the coating part is left, and the non-coating part is formed by a deformation phenomenon caused by heating at 70 ° C. to 130 ° C. in a state where the adhesive handle is adhered and stuck to the paper container. About Adhesive handle constituting the easily grip portion for peeling removal.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
For the mount constituting the adhesive handle according to the present invention, a specific polyester sheet described later having a thermal deformation temperature of 70 to 130 ° C. is used from the viewpoint of easy gripping at the time of peeling and removing described later. .
The heat deformation temperature mentioned here is practical, in terms of appearance, loss of flatness of the sheet due to heating, specifically, a wavy curved surface, a turned-up curved surface, and a cylindrical curved surface due to entrainment of the sheet free edge portion. However, for the numerical expression of the heat distortion temperature, the test temperature of a strip-shaped test piece having a predetermined width and length is made variable and a predetermined static load is applied. The temperature at which a predetermined elongation is obtained after a certain period of time is used. Specifically, a test piece having a width of 10 mm and a distance between chucks of 200 mm is used, and an elongation of 10 mm is obtained after 1 minute under a load of 200 g. Indicates the indicated temperature. A test piece having a distance between chucks of 100 mm can be used depending on the convenience of the sample. However, since the elongation is proportional to the length of the test piece, it goes without saying that in this case, the temperature shows an elongation of 5 mm.
[0010]
The amorphous polyester according to the present invention is a polyester for blow molding (including stretch blow molding), more specifically, adjustment of the molecular weight of the polyester, formation of a heterocopolymer using a plurality of at least one of copolymerization components, A container obtained by blow molding a polyester material for blow molding obtained by means of blending different kinds of polyesters, etc., which has not been used as a container after use for that purpose, or during or after the molding It refers to amorphous polyester obtained by re-formation as a raw material for re-molding, and can be said to be a preferable raw material for recycling of plastics or prevention of environmental destruction based on disposal.
[0011]
As the polyester raw material for the amorphous polyester sheet used for the mount in the present invention, those having a heat deformation temperature of 70 to 130 ° C. are used as described above. In some cases, a lower limit temperature of about 40 ° C. or 60 ° C. may be used, but considering the annual outside air temperature, room temperature, etc., the adhesive handle according to the present invention retains the adhesive strength to the intended paper container. However, the temperature is somewhat uneasy from the viewpoint of the temperature that facilitates peeling and removal from the mount, which is not preferable.
[0012]
Considering the content of a simple operation of peeling and removing the mount from the paper container according to the present invention, the use of precise and sophisticated technology and expensive equipment is usually not suitable for industry. Therefore, in order to cause thermal deformation of the non-adhesive portion using a high temperature heat deformable polyester having a heat deformation temperature of 130 ° C. or higher, the hot air such as a hair dryer in a home is used. Since it is difficult to achieve with the generator, it is difficult to carry out the peeling and removing operation of the adhesive handle as a simple operation or in the home industry, and it is difficult to establish as an industry.
[0013]
Since the amorphous polyester sheet used as a raw material for the mount in the present invention has high rigidity, after being attached to a paper container as an adhesive handle, grip the non-adhesive portion of the mount of the handle with a finger. When peeling and removing, if an attempt is made to immediately insert a finger between the free edge of the peripheral part of the adhesive-uncoated part and the mount without causing heat deformation, the high-rigidity free edge strongly resists the finger. Contact is unavoidable, and the amorphous polyester sheet is often injured (scratched), and it is uneasy from the viewpoint of safety to remove the sheet as the raw material of the mount as it is. Exists.
The present invention is intended to eliminate such anxiety, and at least a part of a free edge which is a long side of an amorphous polyester sheet obtained by extrusion molding is heated and deformed at the appropriate temperature (specifically, As a modified example, it is possible to form and provide a safe easy gripping part for fingertips, etc. by providing a wavy shape, a flipped shape, a heat shrinking shape, etc. It can be said.
[0014]
The thickness of the adhesive handle mount according to the present invention is not particularly limited, but if it is too thin, problems such as wrinkles at the time of sticking the adhesive mount to the paper container are likely to occur and it is difficult to handle as a handle. At the same time, the problem of strength as a handle remains, and conversely, if it is too thick, the workability of adhesive application etc. will deteriorate, and if it is stuck on a thin paper container, the adhesive application part of the mount and its surroundings This is not preferable because the difference in rigidity between the paper containers becomes too large, and destructive stress concentrates on the periphery of the paper containers, which may cause damage to the paper containers. From these points, a sheet of 50 to 200 μm is optimal.
[0015]
Application of the pressure-sensitive adhesive to the mount according to the present invention should be in a form in which the non-applied portion for forming the easy-to-hold portion by thermal deformation is left, not the entire surface of the mount.
The purpose of the non-adhesive part that forms the easy gripping part can be achieved by providing it in at least one corner of the mount. The embodiment is not always efficient. Rather, it is easy to form the non-coated portion along at least one side of the rectangular mount. Therefore, in the present invention, a rectangular shape obtained from a long amorphous polyester sheet by extrusion molding is preferably used as the mount, and at least a part of the long side portion is left, and that portion constitutes a non-coated portion. .
The width of the non-application portion according to the present invention is in the range of 2 to 10 mm, which is the most efficient width for forming an easy grip portion by heat deformation in addition to the heating workability after use as a handle.
In addition, various known means can be appropriately used as processing means such as partial application of the pressure-sensitive adhesive along the length direction of the long sheet.
[0016]
The pressure-sensitive adhesive used in the present invention is not particularly limited, but may have a pressure-sensitive adhesive strength that can withstand the load of the transported material between the mount made of a specific polyester sheet, the belt-like hand piece, and the paper container. Needless to say, it is necessary to select from various types of known pressure-sensitive adhesives regardless of whether they are hot-melt type, non-hot-melt type, solvent type, emulsion type, or the like. Synthetic rubbers such as styrene-isoprene copolymer, styrene-butadiene copolymer, polyisoprene, and natural rubber adhesives, acrylic adhesives such as acrylic ester-methacrylic ester copolymers, ethylene -Vinyl acetate copolymer, ethylene-isobutyl acrylate copolymer, polyvinyl ether, polyurethane, polyamide, etc. It can be exemplified various adhesives.
[0017]
The release paper according to the present invention is attached to the mount so as to cover the entire adhesive-coated portion on one side of the mount. In this case, it is preferable that the release paper is pasted so as to cover not only the adhesive-applied portion of the mount but also the entire surface of the mount including the non-adhesive portion.
[0018]
The method for heating and deforming the non-applied portion of the mount in the state where the adhesive handle according to the present invention is attached to the paper container is not particularly limited, but the non-applied portion is heated as widely as possible to lift from the mount. Is wider and larger.
From this point of view, hot air is blown from the slit, for example, in parallel to the mount and toward the non-adhesive part, and as much hot air as possible is blown between the non-adhesive part of the mount and the paper container of the adhesive object. And a method of promoting the lifting of the adhesive non-applied portion of the mount accompanying thermal deformation is preferable. However, if it is difficult to spray parallel to the mount as described above, it may be sprayed perpendicularly to the non-coated portion.
Such heating easily causes the adhesive-uncoated portion of the mount to be waved, turned up, and deformed such as entrained columnar or cylindrical due to thermal contraction of the long side of the adhesive-uncoated portion, etc. An easy gripping part is formed.
[0019]
Examples of the present invention will be described below to explain the effects of the present invention.
[Example 1]
As the adhesive handle mount, a bottle obtained by hollow molding of polyethylene terephthalate was used after putting drinking water of the product, recovered and pulverized into a remolding raw material. The polyester as the raw material for remolding obtained here was an amorphous polyester having a heat distortion temperature of 90 ° C.
A 120 μm thick sheet is extruded using the raw material, a strip of 41 mm width and 180 mm length is cut out from the sheet and used for a mount, and on both long sides along the length direction of the mount, A pressure sensitive adhesive mainly composed of a styrene-isoprene copolymer was applied, leaving a non-adhesive part having a width of 3 mm. In addition, the application | coating thickness of the adhesive was 30 micrometers.
On the adhesive-coated surface, a uniaxially stretched polypropylene-made strip-shaped handpiece piece having a total length of 390 μm, a width of 13 mm, and a thickness of 500 μm is bent in an inverted U shape, and both ends thereof are adhesively fixed, and then the adhesive is not applied. An adhesive handle was prepared by covering with a release paper covering the entire surface of the mount including the part.
Subsequently, the release paper of the handle is removed, and both end portions thereof are adhered to the outer surfaces of the opposite side surfaces of the cardboard box, and the weight is accommodated therein so that the total load with the box becomes 7 kg. Although kept suspended, there was no peeling separation of the handle.
A flat flow of hot air of 90 ° C. was blown onto the adhesive part of the handle of the box with the handle in which the suspension experiment was performed and in parallel with the handle using a hair dryer. When the hot air is blown for 40 seconds, the adhesive-uncoated portion of the mount is turned up with undulation and a gripping portion is formed by the fingertip. When the gripping portion is gripped, peeling is performed. Was easily peeled from the paper container by 180 degrees.
[0020]
[Example 2]
The same mount as in Example 1 was used except that the width of the mount was 82 mm and the length was 240 mm, and the type of adhesive and the manner of application to the mount were also the same as in Example 1.
The strip-shaped hand-carrying piece was made of the same material as that of the mount, and the same conditions as in Example 1 were used except that a non-stretched material having a total length of 540 mm, a width of 20 mm, and a thickness of 150 μm was used.
A suspension test similar to that of Example 1 was performed except that such an adhesive handle was used and the total load was set to 13 kg, and the peeling treatment of the mount was performed in the same manner as in Example 1. As in Example 1, The result was obtained.
[0021]
[Comparative Example 1]
The mount is a three-layer synthetic paper containing biaxially stretched polypropylene (uses the synthetic paper “YUPO” from Oji Yuka Synthetic Paper Co., Ltd.), a sheet having a thickness of 110 μm, a width of 41 mm, and a length of 180 mm. The type and application mode of the pressure-sensitive adhesive were the same as those in Example 1, and the same strip-shaped handpiece as that used in Example 1 was used.
A suspension test under the same load as in Example 1 was performed, but there was no peeling abnormality. Subsequently, hot air at 100 ° C. was blown on the non-adhesive part in parallel with the handle surface for 1 minute in the same manner as in Example 1. However, the mount was not deformed. It was not seen at all.
[0022]
[Comparative Example 2]
As the mount, a biaxially stretched polypropylene film having a thickness of 60 μm, a width of 41 mm, and a length of 180 mm is used. The type of adhesive and its application mode are the same as those in Example 1, and the band-shaped handpiece is also an example. 1 and the same suspension test as in Example 1 was performed, but there was no abnormality. Subsequently, hot air was blown onto the non-adhesive part in the same manner as in Comparative Example 1, but the mount was not deformed in the same manner, and therefore no deformation such as turning up that could be gripped was observed.
[0023]
[Comparative Example 3]
The same as Example 1 except that the biaxially stretched polyester was used as the mount, and the type and application mode of the pressure-sensitive adhesive were also the same as those of Example 1, and the material and size of the belt-like hand piece were as in Example 1. And the same suspension test as in Example 1, but no abnormal change was observed in the adhesive state.
Furthermore, hot air was blown in the same manner as in Example 1, but no deformation occurred in the adhesive-uncoated portion of the mount, and no deformation that facilitates gripping for peeling the handpiece was observed. .
[0024]
[Comparative Example 4]
The mount is a YUPO (trade name) having a multilayer structure including biaxially oriented polypropylene similar to that in Comparative Example 1, and is the same as Comparative Example 1 except that a sheet having a thickness of 130 μm, a width of 41 mm, and a length of 180 mm is used. It was. The same strip-shaped handbag as in Example 1 was used.
The type of the pressure-sensitive adhesive and the mode of the non-coated part were also the same as in Comparative Example 1. As a result, the grip portion could not be formed as in Comparative Example 3.
[0025]
【The invention's effect】
As is clear from the above detailed description, particularly the examples and comparative examples, the amorphous polyester used for blow molding is a remolded raw material and extruded, and has a heat deformation temperature of 70 to 130. In an adhesive handle using a polyester sheet having a thickness of 50 to 200 μm as a mount, when applying the adhesive to the rectangular mount, along the long side of the rectangle, at least part of the adhesive By sticking the handle with the coated part formed on the paper container, the non-coated part can constitute an easy gripping part for peeling and removing the mount etc. from the paper container based on the phenomenon caused by heat deformation. The effect that peeling, removal, and separation from and became easy.

Claims

Both end portions of the band-shaped handpiece piece deformed in an inverted U shape are adhered to the adhesive portion of the backing sheet coated with the adhesive, and release paper is attached so as to cover the entire adhesive portion, In an adhesive handle that is used as a handle after the release paper is peeled and removed and adhesively attached to a paper container, the mount is made by using a polyester bottle molded product as a raw material for remolding, and has a heat deformation temperature of 70 to 130. It is composed of an extruded amorphous polyester sheet having a thickness of 50 to 200 μm and the application of the adhesive to the mount leaves a non-applied portion of 2 to 10 mm in at least a part of the long side portion of the periphery of the mount. The non-applied part is formed by a deformation phenomenon caused by heating at 70 ° C. to 130 ° C. in a state in which the adhesive handle is adhesively attached to the paper container. Adhesive handle, characterized in that it constitutes the easy-grip portion.