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JP4427144B2 - Adhesive sheet manufacturing method and dust removing device - Google Patents
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JP4427144B2 - Adhesive sheet manufacturing method and dust removing device - Google Patents

Adhesive sheet manufacturing method and dust removing device Download PDF

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JP4427144B2
JP4427144B2 JP32843299A JP32843299A JP4427144B2 JP 4427144 B2 JP4427144 B2 JP 4427144B2 JP 32843299 A JP32843299 A JP 32843299A JP 32843299 A JP32843299 A JP 32843299A JP 4427144 B2 JP4427144 B2 JP 4427144B2
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adhesive sheet
adhesive layer
pressure
base film
sensitive adhesive
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JP2001139896A (en
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糺 川島
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Dexerials Corp
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Sony Chemical and Information Device Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、粘着シートの技術分野にかかり、特に部分的に粘着層が形成された粘着シートの製造方法に関する。
【0002】
【従来の技術】
従来より、基体フィルムと、その表面に粘着層が形成された粘着シートは広く用いられており、この粘着シートを除塵器具に使用する場合、粘着層は平坦よりもその表面に凹凸が形成されているほうがゴミが付着しやすく、除塵効果が高いことが知られている。
【0003】
図6(a)〜(c)を参照し、従来技術での粘着シート製造方法を説明すると、先ず、同図符号111は長反状の基体フィルムを示している(図4(a))。この基体フィルム111上に粘着剤を塗付し粘着層114を形成し、これに、櫛状ナイフブレード130を基体フィルム111の長反方向とは垂直に押し当て、その先端部132が接着層114に埋没するような状態で固定する(同図(b))。次いで粘着層114を基体フィルム111と共に長手方向に送ると、櫛状ナイフブレード130の先端部132と接触した箇所ではその部分の粘着層114が削り取られ、長手方向に溝状の凹部118bが形成される。次いで乾燥すると、粘着層114に凸部118aと凹部118bが形成された粘着シート120が得られる(同図(c))。
【0004】
このように従来技術ではナイフブレードを用いて粘着剤の塗付量を制御している。この方法は簡易であるので、粘着シートの生産に用いられている。
【0005】
しかしながら、粘着層114は乾燥する前の段階では流動性を有するので、凸部118aから凹部118bへ粘着剤が流れ、これらの高低差は小さくなってしまう。特に櫛状ナイフブレード130で粘着層114を浅く削りとった場合には、凸部118aと凹部118bとの高低差が殆どなくなってしまう。この高低差を大きくするために、櫛状ナイフブレード130で粘着層114を深く削り取ろうとすると、櫛状ナイフブレード130の先端部132によって基体フィルム111が傷ついたり、甚だしい場合は破れたりする恐れがある。
【0006】
従って、従来技術では、粘着シートの粘着層に十分な高低差のある凹凸を形成するのは困難であった。
【0007】
【発明が解決しようとする課題】
本発明は上記従来技術の不都合を解決するために創作されたものであり、特に粘着層が部分的に形成された粘着シートを製造することを目的とする。
【0008】
【課題を解決するための手段】
上記課題を解決するために、請求項1記載の発明は、基体フィルム表面を摩擦手段によって擦り、摩擦処理面を形成した後、前記基体フィルムの摩擦処理面を部分的に加熱し、前記摩擦処理面に粘着層を形成し、前記粘着層表面に剥離手段を貼付した後、前記剥離手段を剥離させ、加熱された前記摩擦処理面上の前記粘着層を前記剥離手段に転着させ、部分的に粘着層が形成された粘着シートを得粘着シート製造方法である。
請求項2記載の発明は、請求項1記載の粘着シート製造方法であり、前記部分的な加熱は、昇温させた加熱手段を前記基体フィルムに接触させ、前記基体フィルムと前記加熱手段とを相対的に移動させながら行うことを特徴とする。
請求項3記載の発明は、請求項2記載の粘着シート製造方法であり、前記加熱手段の温度は60℃以上100℃以下にすることを特徴とする。
請求項4記載の発明は、請求項1及至請求項3のいずれか1項記載の粘着シート製造方法であり、前記基体フィルムの少なくとも前記摩擦処理面が形成される面には、脂肪族ポリエステルフィルムを配置しておくことを特徴とする。
請求項5記載の発明は、請求項4記載の粘着シート製造方法であり、前記脂肪族ポリエステルフィルムは、ポリ乳酸フィルムであることを特徴とする
請求項6記載の発明は、請求項1及至請求項5いずれか1項記載の粘着シート製造方法であって、前記基体フィルムの前記摩擦処理面には、ポリイソプレンゴムを主成分とする粘着層を形成することを特徴とする。
請求項7記載の発明は除塵器具であって、請求項1及至請求項6いずれか1項記載の粘着シート製造方法で作成された粘着シートと、前記粘着シートの基体フィルムがその表面に配置された基台とを有することを特徴とする。
請求項8記載の発明は、請求項7記載の除塵器具であって、前記基台は円筒形状であり、前記粘着シートが前記基台の外周に前記粘着層を外側に向けて巻かれたことを特徴とする。
【0009】
本発明は上記のように構成されており、先ず、基体フィルム表面を摩擦手段によって摩擦処理する。例えばポリ乳酸フィルムを摩擦処理した後、その表面に天然ゴムからなる粘着層を形成した場合、ポリ乳酸フィルムと粘着層とは1000g/2cm(測定対象は2cm幅のフィルム試験片)の力をかけても剥離しない。他方ポリ乳酸フィルムを摩擦処理せず、粘着層を形成した場合、ポリ乳酸フィルムと粘着層とは30g/2cmの力で剥離する。従って、基体フィルムの摩擦処理面では、粘着層との接着力が向上されている。
【0010】
ところが、本発明の発明者等は、表面を摩擦処理した基体フィルムを加熱後、粘着層を形成すると、接着力の向上効果が消失するということを見出した。例えば、ポリ乳酸フィルムの摩擦処理した表面に、加熱した半田ごて状の棒を押し当てた後、その表面に天然ゴムから成る粘着層を形成した場合、ポリ乳酸フィルムと粘着層とは30g/2cmの力で剥離した。
【0011】
従って、基体フィルム表面の広い面積を摩擦処理して摩擦処理面を形成し、その摩擦処理面を部分的に加熱した後、摩擦処理面全体に粘着層を形成すると、摩擦処理面の加熱された部分では、粘着層と基体フィルムとの接着強度が弱くなり、その部分の粘着層を除去することが容易になる。
【0012】
例えば、シート状の剥離手段を上記のような粘着層に貼着した後、剥離すると、粘着層と基体フィルムとの間の接着力の差を利用して、粘着層を部分的に剥離することができる。この場合、剥離手段と粘着層との間の接着力が、摩擦処理された基体フィルムと粘着層との間の接着力よりは小さく、摩擦処理面の加熱された部分の基体フィルムと粘着層との間の接着力よりは大きいと、摩擦処理面の加熱処理された部分の粘着層のみをきれいに剥離することができる。
【0013】
本発明に用いることができる剥離手段は、例えば、剥離シートのようなシート状のものでも、ロール形状のものでもよい。また剥離手段は単層構造でも複数層の積層構造でもよく、また、接着層に貼着される面には粘着層を形成しておいてもよい。
【0014】
基体フィルムの部分的加熱に用いる加熱手段は、ロール形状のもの、歯車形状のもの、半田ごて形状のものなどを用いることができる。これらの加熱手段を基体フィルムに接触した状態で、基体フィルムを走行させると、連続して加熱処理を行うことができる。
【0015】
基体フィルムの摩擦処理面は60℃未満の温度に加熱されても摩擦処理効果が消失しないが、60℃以上の加熱では消失する。他方、基体フィルムの摩擦処理面にポリ乳酸フィルムを用いた場合、100℃を超えて加熱すると収縮してしまう。従って、本発明では加熱手段を60℃以上100℃以下の温度範囲で昇温し部分的加熱に用いると、基体フィルムを傷めずに摩擦処理効果を消失させることができる。
【0016】
本発明の基体フィルムにポリ乳酸フィルムや脂肪族ポリエステルフィルムのような生分解性を有する樹脂フィルムを用い、同様に粘着層にも天然ゴムや合成ポリイソプレンのように、ポリイソプレンを主成分とする、生分解性の粘着剤を用いると、粘着シートの廃棄処理が容易になる。
【0017】
従って、本発明の製造方法で作成した粘着シートを用いると、除塵効果が高く、廃棄も用意な除塵器具を作成することができる。
【0018】
【発明の実施の形態】
本発明の粘着シート製造方法の実施例を図面を用いて説明する。
図1を参照し、長反状のポリ乳酸フィルム(島津製作所(株)製商品名ラクティを二軸延伸したフィルム)を巻き取った繰り出しロール3と、ロール本体表面に綿布等の柔軟性がある摩擦布が設けられた摩擦手段7とを用意し、繰り出しロール3からポリ乳酸フィルム9を引き出し、摩擦手段7に掛け渡し、巻き取りロール4で巻き取る。このとき、摩擦手段7を、ポリ乳酸フィルム9の進行方向とは逆向きに回転させ、ポリ乳酸フィルム9表面が乾燥雰囲気(常温、常圧、大気中)中で摩擦されるようにすると、摩擦手段7の幅は、ポリ乳酸フィルム9のテープ幅より大きいので、ポリ乳酸フィルム9はその全面が摩擦処理される。
【0019】
図2(a)符号11は上記の工程で摩擦処理された基体フィルムを示しており、同図符号18はその基体フィルム11の摩擦手段によって擦られた摩擦処理面を示している。
【0020】
次に、半田ごて状の金属からなる棒13を1cm間隔で複数本配置し、これらを80℃に加熱した後、基体フィルム11の摩擦処理面18に押し当てる。棒13に押し当てられ、加熱された部分18bでは摩擦処理による接着力の向上効果が消失し、他の部分18aでは摩擦処理による接着力の向上効果が維持される。
【0021】
上記のような基体フィルム11を一般的な粘着層形成装置内を移動させ、有機溶剤中にポリイソプレンを主成分とする天然ゴム系粘着剤が溶解された粘着層原料液を基体フィルム11の摩擦処理面18の全面に塗布・乾燥し、厚さ10μmの粘着層14を形成する(同図(c))。
【0022】
次に、シート状の剥離手段30を用意する。この剥離手段30のポリ乳酸フィルムからなる基体フィルム31の表面は上記摩擦処理工程と同様の工程で全面が摩擦処理され、摩擦処理された表面全体に天然ゴムから成る粘着層34が形成されている。この剥離手段30の粘着層34と上記粘着層14とを向かい合わせ、次いでこれらを貼着した後、剥離手段30を剥離すると(同図(d))、上記摩擦処理面18の加熱された部分18bでは、基体フィルム11と粘着層14との接着力が粘着層同士14、34の接着力よりも小さいので、粘着層14は基体フィルム11から剥離され、剥離手段30に転着される。また、他の部分18aでは、基体フィルム11と粘着層14との接着力が粘着層同士14、34の接着力よりも大きいので、剥離手段は粘着層同士14、34の界面で剥離し、粘着層14は基体フィルム11上に保持される(同図(d))。
【0023】
同図(e)符号20は上記の工程で形成された粘着シートを示している。この粘着シート20の粘着層14は基体フィルム11上に部分的に形成されているので、粘着層14の凹凸の高低差hは粘着層の厚さ(この場合は約10μm)に等しくなる。従って、従来技術の粘着シート120に比べ、高低差の大きい凹凸形状の粘着層34を有する粘着シート20を製造することができる。
【0024】
上記実施例ではポリ乳酸フィルムの表面を摩擦処理し、基体フィルム11として用いたが、本発明はこれに限定されるものではなく、生分解性を有し、表面を摩擦処理したフィルムを広く用いることができる。ポリ乳酸フィルム以外の生分解性フィルムの例として、ビオノーレフィルムを用いた粘着テープについて説明する。
【0025】
ビオノーレは、1,4−ブタンジオールのようなグリコールと、コハク酸やアジピン酸のような脂肪族ジカルボン酸の重縮合反応によって得られる高分子量の脂肪族ポリエステルであり、生分解性を有している。
【0026】
その分子構造は次の化学式で表される。
【0027】
【化1】

Figure 0004427144
【0028】
ビオノーレフィルムは上記化学式のmとnの組合せにより、ポリブチレンサクシネート(PBS)とポリブチレンサクシネート・アジペート(PBSA)の二種類に分類される。
【0029】
ビオノーレフィルム(PBSとPBSA)の物性を汎用樹脂と比較して下記表に示す。
【0030】
【表1】
Figure 0004427144
【0031】
上記表1から分かるように、ビオノーレは引張り伸びが大きく、粘り強く柔らかである。従って、柔軟性が求められるフィルム、シート、不織布等の用途に適している。
【0032】
基体フィルム11にはビオノ―レフィルムやポリ乳酸フィルムを単層で用いるだけではなく、上記のような生分解性を有するフィルムを2層以上積層させてもよい。
【0033】
摩擦処理による基体フィルム11と粘着層14との間の接着力の向上効果はポリエステルフィルムやポリイミドフィルム等の樹脂フィルムでも得られるので、このような生分解性を有しない合成樹脂フィルムを基体フィルムとして用いることができるが、環境保全の見地からは、生分解性を有する樹脂フィルムを用いることが望ましい。
【0034】
摩擦処理効果を部分的に消失させるために、上記実施例では加熱した棒13を基体フィルム11の摩擦処理面18に押し当てたが、摩擦処理面18の反対側の面に棒13を押し当ててもよい。
【0035】
なお、粘着層14を形成するために用いることができる粘着剤には、上記実施例のようにポリイソプレンを主成分とする天然ゴムの他、合成イソプレンゴムや、ニトリルゴム、SBRゴム等の種々のゴム系粘着剤を用いることができる。但し、生分解性の観点からは上記基体フィルム11と同様に、天然ゴムや合成イソプレンゴムを使用することが望ましく、また、粘着層14に不透明化のための充填剤や着色剤を添加する場合も、粘着層14の生分解性を阻害しないものを用いるとよい。
【0036】
また、上記実施例では基体フィルム11の摩擦処理面18に直接粘着層14を形成したが、先ずプライマー層を形成し、その上に粘着層を積層してもよい。この場合もプライマー層原料に生分解性のものを用いるとよい。
【0037】
このように、本発明による粘着シート20は全体が生分解性を有する物質で構成されているので、廃棄の問題や、焼却の際のダイオキシンの問題が無くなる。
【0038】
次に、上記実施例で作成された粘着シート20を用いた除塵器具の一例を説明する。図3符号50はローラー型の除塵器具(粘着ローラー)を示しており、この除塵器具50は、支軸52と、腕部53と、基台51と、粘着シート20とを有している。支軸52は円柱形状の金属で構成されており、腕部53は棒状の金属で構成されている。この腕部53一端には把持部54が取り付けられており、他端は支軸52の底面に互いに回転可能に取り付けられている。
【0039】
基台51は中空円筒形状のダンボール紙で構成されており、その内部には支軸52が腕部53が取り付けられた底面とは反対の底面から挿入されている。支軸52の外周と基台51の内周とはほぼ等しく形成されているので、支軸52が基台51内に挿入された状態では、基台51内周の表面には支軸52外周の表面が密着され、支軸52は基台51内から容易に抜け落ちないようになっている。基台51外周には、粘着層14を外側にした状態で、粘着シート20が複数周巻かれている。この粘着シート20を基台51に取り付ける場合、粘着層14の溝形状は基台51の中心軸線と垂直方向でも水平方向でも構わない。
【0040】
本発明の除塵器具50は上記のように構成されており、これを使用して床面の塵を清掃する場合には、把持部54を把持した状態で粘着シート20の粘着層14を床面に密着させ、支軸52および基台51の中心軸線と垂直方向に動かすと、粘着シート20は基台51及び支軸52と共に回転し、粘着シート20表面の粘着層14に床面の塵が付着する。
【0041】
本発明の除塵器具50はその粘着シート20の粘着性を失った部分を切り取って廃棄することができる。この粘着シート20の基体フィルム11と粘着層14とは生分解性を有する物質で構成されているので、その廃棄が容易である。また、基台51をダンボール等の生分解性を有する材料で構成させておくと、新しい粘着シート20を基台51と共に装着するとき、古い基台51を廃棄するのも容易である。
【0042】
また本発明の粘着シート20を用いた除塵器具は、ローラー型のものに限定されず、例えば、粘着シート20の基体フィルム11をマット状の基台上に配置した除塵器具(ダストマット)を作成することもできる。
【0043】
なお、上記実施例では、基体フィルム11の全面を摩擦処理したが、本発明はこれに限定されるものではなく、例えば、摩擦手段7の幅を狭くすれば、基体フィルム11の中心部のみを摩擦処理することができ、逆に端部のみを摩擦処理することも可能である。
【0044】
上記実施例では、棒13を加熱手段として用いる場合について説明したが、本発明はこれに限定されるものではなく、それぞれ図4の符号60、と図5の符号80に示したような加熱手段を用いることもできる。
【0045】
図4に示した加熱手段60は、支軸62と複数の金属からなる円板64(図面上では17個示している)とを有している。各円板64は間隔を空けて配置されており、それらの中心部に支軸62が挿入されている。各円板64は支軸62を中心軸として回転可能に取り付けられている。支軸62は図示されていない発熱装置に接続されている。
【0046】
この加熱手段60を用いて上記実施例の図1と同様の工程で摩擦処理した基体フィルム71を加熱処理する工程を説明すると、先ず、加熱手段60を所定温度に加熱し、基体フィルム71の摩擦処理面78に押し当てる。この状態で基体フィルム71を加熱手段60の支軸62と垂直方向に走行させると共に、各円板64を基体フィルム78から離さずに回転させると、摩擦処理面78の各円板64に接触した部分が連続的に加熱され、その結果、基体フィルム78の摩擦処理面78には、基体フィルム71の長手方向と平行に加熱された部分78bが円板64と同じ個数形成される。
【0047】
他方、図5で示した加熱手段80は金属からなる歯車84と支軸82とを有しており、歯車84の中心部には支軸82が挿入されている。この歯車84表面には歯86が設けられている。歯車84は支軸82を中心軸として回転可能にとりつけられている。
【0048】
この加熱手段80を用いて上記実施例の図1と同様の工程で摩擦処理した基体フィルム91を加熱処理する工程を説明すると、先ず、加熱手段80を図示されていない発熱手段を用いて所定温度に加熱し、基体フィルム91の摩擦処理面98に押し当てる。この状態で基体フィルム91を加熱手段80の中心軸線と垂直方向に走行させると共に、歯車84を基体フィルム91から離さず、等速度で回転させると、摩擦処理面98の歯車84の歯86に接触した部分が連続して加熱される。その結果、基体フィルム91の摩擦処理面98には、長手方向と垂直に加熱された部分98bが歯86と同じ個数形成される。
【0049】
従って、上記のような加熱手段60、80によって加熱処理された基体フィルム71、91の摩擦処理面78、98に、粘着層を形成し、図2(d)で示したように、剥離シートを用いてこの粘着層を部分的に剥離すると、図4の加熱手段60で加熱処理された基体フィルム71では粘着シートの長手方向と平行な溝状の粘着層が形成され、図5の加熱手段80で加熱処理された基体フィルム91では粘着シートの長手方向と垂直な溝状に粘着層が形成される。いずれの加熱手段も基体フィルムを連続して加熱処理することができるので、大量生産に用いることができる。
【0050】
【発明の効果】
基体フィルム上に部分的に粘着層が形成された粘着シートを製造できる。またこの粘着シートは生分解性を有する物質で構成されているので、この粘着シートを用いると、除塵効果が高く、廃棄の容易な除塵器具を得ることができる。
【図面の簡単な説明】
【図1】本発明の粘着テープ製造方法を説明するための図
【図2】(a)〜(e):本発明の粘着テープ製造方法を説明するための図
【図3】本発明の除塵器具の一例である粘着ローラーの斜視図
【図4】本発明に用いられる加熱手段を説明するための図
【図5】上記の加熱手段と異なる加熱手段を説明するための図
【図6】(a)〜(c):従来技術での粘着テープ製造方法を説明するための図
【符号の説明】
11……基体フィルム
13……棒
14、34……粘着層
18……摩擦処理面
18a……加熱された部分
18b……他の部分
20……粘着シート
30……剥離手段
50……除塵器具
51……基台[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the technical field of pressure-sensitive adhesive sheets, and particularly relates to a method for producing a pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer is partially formed.
[0002]
[Prior art]
Conventionally, a base film and an adhesive sheet having an adhesive layer formed on the surface thereof have been widely used. When this adhesive sheet is used for a dust removing device, the adhesive layer has an uneven surface on its surface rather than flat. It is known that dust adheres more easily and has a higher dust removal effect.
[0003]
Referring to FIGS. 6A to 6C, the pressure-sensitive adhesive sheet manufacturing method according to the prior art will be described. First, the reference numeral 111 indicates a long substrate film (FIG. 4A). An adhesive is applied on the base film 111 to form an adhesive layer 114, and a comb-shaped knife blade 130 is pressed against the base film 111 in a direction perpendicular to the longitudinal direction of the base film 111, and the tip 132 thereof is the adhesive layer 114. It is fixed in such a state that it is buried in (Fig. 2 (b)). Next, when the adhesive layer 114 is sent in the longitudinal direction together with the base film 111, the adhesive layer 114 at that portion is scraped off at the place where it comes into contact with the tip portion 132 of the comb-shaped knife blade 130, and a groove-like recess 118b is formed in the longitudinal direction. The Next, when dried, the pressure-sensitive adhesive sheet 120 in which the convex portion 118a and the concave portion 118b are formed on the pressure-sensitive adhesive layer 114 is obtained ((c) in the figure).
[0004]
Thus, in the prior art, the amount of adhesive applied is controlled using a knife blade. Since this method is simple, it is used for the production of pressure-sensitive adhesive sheets.
[0005]
However, since the pressure-sensitive adhesive layer 114 has fluidity before drying, the pressure-sensitive adhesive flows from the convex portion 118a to the concave portion 118b, and the height difference between them becomes small. In particular, when the adhesive layer 114 is sharply shaved with the comb-shaped knife blade 130, there is almost no difference in height between the convex portion 118a and the concave portion 118b. In order to increase the height difference, if the adhesive layer 114 is deeply scraped off with the comb-shaped knife blade 130, the base film 111 may be damaged by the tip portion 132 of the comb-shaped knife blade 130 or may be torn in a severe case. is there.
[0006]
Therefore, with the conventional technology, it has been difficult to form unevenness having a sufficient level difference in the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet.
[0007]
[Problems to be solved by the invention]
The present invention has been created to solve the above-described disadvantages of the prior art, and in particular, an object of the present invention is to produce an adhesive sheet in which an adhesive layer is partially formed.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, an invention according to claim 1, rubbing the base film surface by friction means, after forming the rubbing surfaces, the rubbing surface is partially heated in the base film, the rubbing After forming an adhesive layer on the surface and attaching a peeling means to the surface of the adhesive layer, the peeling means is peeled off, and the adhesive layer on the heated friction-treated surface is transferred to the peeling means, and partially it is obtained Ru adhesive sheet manufacturing method an adhesive sheet having the adhesive layer formed on.
A second aspect of the present invention is the pressure-sensitive adhesive sheet manufacturing method according to the first aspect, wherein the partial heating is performed by bringing a heated heating means into contact with the base film, and the base film and the heating means. It is characterized by being performed while relatively moving.
A third aspect of the invention is the pressure-sensitive adhesive sheet manufacturing method according to the second aspect, wherein the temperature of the heating means is 60 ° C. or higher and 100 ° C. or lower.
Invention of Claim 4 is an adhesive sheet manufacturing method of any one of Claim 1 to Claim 3, Comprising: An aliphatic polyester film is provided in the surface in which the said friction treatment surface is formed at least of the said base film. It is characterized by arranging.
The invention according to claim 5 is the pressure-sensitive adhesive sheet manufacturing method according to claim 4 , wherein the aliphatic polyester film is a polylactic acid film .
Invention according to claim 6, a pressure-sensitive adhesive sheet production method of any one of claims 1及至claim 5, the rubbing surface of the base film is composed mainly of polyisoprene rubber adhesive A layer is formed.
The invention of claim 7, wherein, there is provided a dedusting device, a pressure-sensitive adhesive sheet created by the pressure-sensitive adhesive sheet production method of any one of claims 1及至claim 6, the substrate film of the adhesive sheet on the surface thereof And an arranged base .
The invention according to claim 8 is the dust removing device according to claim 7, wherein the base is cylindrical, and the adhesive sheet is wound around an outer periphery of the base with the adhesive layer facing outward. It is characterized by.
[0009]
The present invention is configured as described above. First, the surface of the base film is subjected to friction treatment by a friction means. For example, when an adhesive layer made of natural rubber is formed on the surface of a polylactic acid film after friction treatment, the polylactic acid film and the adhesive layer are applied with a force of 1000 g / 2 cm (measurement target is a 2 cm wide film test piece). Even if it does not peel. On the other hand, when the polylactic acid film is not subjected to friction treatment and an adhesive layer is formed, the polylactic acid film and the adhesive layer are peeled off with a force of 30 g / 2 cm. Therefore, the adhesive force with the pressure-sensitive adhesive layer is improved on the friction-treated surface of the base film.
[0010]
However, the inventors of the present invention have found that the effect of improving the adhesive strength disappears when the pressure-sensitive adhesive layer is formed after heating the base film whose surface has been subjected to friction treatment. For example, when a heated soldering iron-like bar is pressed against the friction-treated surface of a polylactic acid film and then an adhesive layer made of natural rubber is formed on the surface, the polylactic acid film and the adhesive layer are 30 g / Peeling with a force of 2 cm.
[0011]
Accordingly, a friction treatment surface is formed by rubbing a large area of the base film surface, and after the friction treatment surface is partially heated, an adhesive layer is formed on the entire friction treatment surface. In the portion, the adhesive strength between the pressure-sensitive adhesive layer and the base film becomes weak, and it becomes easy to remove the pressure-sensitive adhesive layer in that portion.
[0012]
For example, after the sheet-like peeling means is adhered to the adhesive layer as described above and then peeled off, the adhesive layer is partially peeled using the difference in adhesive strength between the adhesive layer and the base film. Can do. In this case, the adhesive force between the peeling means and the adhesive layer is smaller than the adhesive force between the friction-treated base film and the adhesive layer, and the base film and adhesive layer in the heated part of the friction-treated surface When the adhesive force is larger than the adhesive force, only the pressure-sensitive adhesive layer in the heat-treated portion of the friction-treated surface can be peeled cleanly.
[0013]
The peeling means that can be used in the present invention may be, for example, a sheet-like sheet such as a peeling sheet or a roll-shaped one. The peeling means may be a single layer structure or a laminated structure of a plurality of layers, and an adhesive layer may be formed on the surface to be attached to the adhesive layer.
[0014]
The heating means used for partial heating of the base film may be a roll shape, a gear shape, a soldering iron shape, or the like. When the base film is run in a state where these heating means are in contact with the base film, the heat treatment can be continuously performed.
[0015]
Even if the friction-treated surface of the base film is heated to a temperature of less than 60 ° C., the friction treatment effect does not disappear, but it disappears when heated to 60 ° C. or higher. On the other hand, when a polylactic acid film is used for the friction-treated surface of the base film, it will shrink if heated above 100 ° C. Therefore, in the present invention, when the heating means is heated in the temperature range of 60 ° C. or higher and 100 ° C. or lower and used for partial heating, the effect of friction treatment can be lost without damaging the base film.
[0016]
The base film of the present invention is a biodegradable resin film such as a polylactic acid film or an aliphatic polyester film, and the adhesive layer is also composed mainly of polyisoprene, such as natural rubber or synthetic polyisoprene. When a biodegradable pressure-sensitive adhesive is used, disposal of the pressure-sensitive adhesive sheet is facilitated.
[0017]
Therefore, when the pressure-sensitive adhesive sheet prepared by the production method of the present invention is used, it is possible to create a dust removal device that has a high dust removal effect and is ready for disposal.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the pressure-sensitive adhesive sheet manufacturing method of the present invention will be described with reference to the drawings.
Referring to FIG. 1, a roll-out poly roll 3 (a film obtained by biaxially stretching a product name Lacti manufactured by Shimadzu Corporation) and a roll body surface has flexibility such as cotton cloth. Friction means 7 provided with a friction cloth is prepared, the polylactic acid film 9 is pulled out from the feeding roll 3, is passed over the friction means 7, and is taken up by the take-up roll 4. At this time, the friction means 7 is rotated in the direction opposite to the traveling direction of the polylactic acid film 9 so that the surface of the polylactic acid film 9 is rubbed in a dry atmosphere (normal temperature, normal pressure, in the air). Since the width of the means 7 is larger than the tape width of the polylactic acid film 9, the entire surface of the polylactic acid film 9 is subjected to friction treatment.
[0019]
2A shows a base film that has been subjected to friction processing in the above-described process, and reference numeral 18 shows a friction-treated surface that is rubbed by the friction means of the base film 11. FIG.
[0020]
Next, a plurality of rods 13 made of soldering iron metal are arranged at 1 cm intervals, heated to 80 ° C., and then pressed against the friction-treated surface 18 of the base film 11. The effect of improving the adhesive force by the friction treatment disappears in the heated portion 18b pressed against the rod 13, and the effect of improving the adhesive force by the friction treatment is maintained in the other portion 18a.
[0021]
The base film 11 as described above is moved in a general adhesive layer forming apparatus, and an adhesive layer raw material solution in which a natural rubber-based adhesive mainly composed of polyisoprene is dissolved in an organic solvent is used to rub the base film 11. It is applied and dried on the entire treated surface 18 to form an adhesive layer 14 having a thickness of 10 μm ((c) in the figure).
[0022]
Next, a sheet-like peeling means 30 is prepared. The entire surface of the base film 31 made of a polylactic acid film of the peeling means 30 is subjected to a friction process in the same process as the friction process, and an adhesive layer 34 made of natural rubber is formed on the entire surface subjected to the friction process. . When the pressure-sensitive adhesive layer 34 of the peeling means 30 and the pressure-sensitive adhesive layer 14 are faced to each other and then adhered, the peeling means 30 is peeled off ((d) in the same figure). In 18b, since the adhesive force between the base film 11 and the adhesive layer 14 is smaller than the adhesive force between the adhesive layers 14 and 34, the adhesive layer 14 is peeled off from the base film 11 and transferred to the peeling means 30. Moreover, in the other part 18a, since the adhesive force between the base film 11 and the adhesive layer 14 is larger than the adhesive force between the adhesive layers 14 and 34, the peeling means peels off at the interface between the adhesive layers 14 and 34. The layer 14 is held on the base film 11 ((d) in the figure).
[0023]
(E) The code | symbol 20 has shown the adhesive sheet formed at said process. Since the pressure-sensitive adhesive layer 14 of the pressure-sensitive adhesive sheet 20 is partially formed on the base film 11, the height difference h of the unevenness of the pressure-sensitive adhesive layer 14 is equal to the thickness of the pressure-sensitive adhesive layer (in this case, about 10 μm). Therefore, the pressure-sensitive adhesive sheet 20 having the concavo-convex-shaped pressure-sensitive adhesive layer 34 having a large difference in height can be produced as compared with the pressure-sensitive adhesive sheet 120 of the prior art.
[0024]
In the above embodiment, the surface of the polylactic acid film was subjected to friction treatment and used as the base film 11. However, the present invention is not limited to this, and a film having biodegradability and friction treatment on the surface is widely used. be able to. As an example of a biodegradable film other than a polylactic acid film, an adhesive tape using a bionore film will be described.
[0025]
Bionore is a high molecular weight aliphatic polyester obtained by polycondensation reaction of glycol such as 1,4-butanediol and aliphatic dicarboxylic acid such as succinic acid and adipic acid, and has biodegradability. Yes.
[0026]
Its molecular structure is represented by the following chemical formula.
[0027]
[Chemical 1]
Figure 0004427144
[0028]
Bionore films are classified into two types, polybutylene succinate (PBS) and polybutylene succinate adipate (PBSA), depending on the combination of m and n in the above chemical formula.
[0029]
The physical properties of Bionore films (PBS and PBSA) are shown in the following table in comparison with general-purpose resins.
[0030]
[Table 1]
Figure 0004427144
[0031]
As can be seen from Table 1 above, Bionore has a large tensile elongation and is tenacious and soft. Therefore, it is suitable for applications such as films, sheets, and nonwoven fabrics that require flexibility.
[0032]
As the base film 11, not only a single layer of a bionore film or a polylactic acid film may be used, but two or more films having the above biodegradability may be laminated.
[0033]
Since the effect of improving the adhesive force between the base film 11 and the pressure-sensitive adhesive layer 14 by the friction treatment can also be obtained with a resin film such as a polyester film or a polyimide film, such a synthetic resin film having no biodegradability is used as the base film. Although it can be used, it is desirable to use a biodegradable resin film from the viewpoint of environmental conservation.
[0034]
In order to partially eliminate the friction treatment effect, the heated rod 13 is pressed against the friction treatment surface 18 of the base film 11 in the above embodiment, but the rod 13 is pressed against the surface opposite to the friction treatment surface 18. May be.
[0035]
The pressure-sensitive adhesive that can be used to form the pressure-sensitive adhesive layer 14 includes various natural rubbers such as synthetic isoprene rubber, nitrile rubber, and SBR rubber in addition to natural rubber mainly composed of polyisoprene as in the above-described embodiment. The rubber-based pressure-sensitive adhesive can be used. However, from the viewpoint of biodegradability, it is desirable to use natural rubber or synthetic isoprene rubber as in the case of the base film 11, and a case where a filler or colorant for opacification is added to the adhesive layer 14. Also, a material that does not inhibit the biodegradability of the adhesive layer 14 may be used.
[0036]
Moreover, in the said Example, although the adhesion layer 14 was directly formed in the friction processing surface 18 of the base film 11, a primer layer may be formed first and an adhesion layer may be laminated | stacked on it. Also in this case, it is preferable to use a biodegradable primer layer material.
[0037]
Thus, since the pressure-sensitive adhesive sheet 20 according to the present invention is entirely composed of a biodegradable substance, the problem of disposal and the problem of dioxin during incineration are eliminated.
[0038]
Next, an example of a dust removal tool using the pressure-sensitive adhesive sheet 20 created in the above embodiment will be described. 3 indicates a roller-type dust removing device (adhesive roller). The dust removing device 50 includes a support shaft 52, an arm portion 53, a base 51, and an adhesive sheet 20. The support shaft 52 is made of a cylindrical metal, and the arm portion 53 is made of a rod-shaped metal. A grip portion 54 is attached to one end of the arm portion 53, and the other end is attached to the bottom surface of the support shaft 52 so as to be rotatable relative to each other.
[0039]
The base 51 is composed of a hollow cylindrical corrugated cardboard, and a support shaft 52 is inserted into the inside from the bottom surface opposite to the bottom surface to which the arm portion 53 is attached. Since the outer periphery of the support shaft 52 and the inner periphery of the base 51 are formed to be substantially equal, when the support shaft 52 is inserted into the base 51, the outer periphery of the support shaft 52 is formed on the surface of the inner periphery of the base 51. The support shaft 52 is prevented from easily falling off from the inside of the base 51. A plurality of adhesive sheets 20 are wound around the outer periphery of the base 51 with the adhesive layer 14 facing outward. When the pressure-sensitive adhesive sheet 20 is attached to the base 51, the groove shape of the pressure-sensitive adhesive layer 14 may be perpendicular or horizontal to the center axis of the base 51.
[0040]
The dust removing device 50 of the present invention is configured as described above, and when the dust on the floor surface is cleaned using the dust removing device 50, the adhesive layer 14 of the adhesive sheet 20 is placed on the floor surface while the grip portion 54 is gripped. When the adhesive sheet 20 is moved in a direction perpendicular to the central axis of the support shaft 52 and the base 51, the adhesive sheet 20 rotates together with the base 51 and the support shaft 52, and dust on the floor surface is deposited on the adhesive layer 14 on the surface of the adhesive sheet 20. Adhere to.
[0041]
The dust removing device 50 of the present invention can cut and discard the part of the adhesive sheet 20 that has lost its adhesiveness. Since the base film 11 and the pressure-sensitive adhesive layer 14 of the pressure-sensitive adhesive sheet 20 are made of a biodegradable substance, the disposal thereof is easy. Further, if the base 51 is made of a biodegradable material such as cardboard, the old base 51 can be easily discarded when the new adhesive sheet 20 is mounted together with the base 51.
[0042]
Further, the dust removing device using the pressure sensitive adhesive sheet 20 of the present invention is not limited to the roller type, and for example, a dust removing device (dust mat) in which the base film 11 of the pressure sensitive adhesive sheet 20 is arranged on a mat-like base is created. You can also
[0043]
In the above embodiment, the entire surface of the base film 11 is subjected to the friction treatment. However, the present invention is not limited to this. For example, if the width of the friction means 7 is reduced, only the central portion of the base film 11 is applied. Friction processing can be performed, and conversely, only the end portion can be subjected to friction processing.
[0044]
In the above embodiment, the case where the rod 13 is used as the heating means has been described. However, the present invention is not limited to this, and the heating means as shown by reference numeral 60 in FIG. 4 and reference numeral 80 in FIG. 5 respectively. Can also be used.
[0045]
The heating means 60 shown in FIG. 4 has a support shaft 62 and a plurality of discs 64 (shown in the drawing are 17 pieces). Each disk 64 is arranged at intervals, and a support shaft 62 is inserted in the center thereof. Each disk 64 is attached to be rotatable about a support shaft 62 as a central axis. The support shaft 62 is connected to a heat generating device (not shown).
[0046]
The process of heat-treating the base film 71 friction-treated in the same process as in FIG. 1 of the above embodiment using this heating means 60 will be described. First, the heating means 60 is heated to a predetermined temperature, and the base film 71 is rubbed. Press against the processing surface 78. In this state, when the base film 71 travels in a direction perpendicular to the support shaft 62 of the heating means 60 and each disk 64 is rotated without being separated from the base film 78, it comes into contact with each disk 64 of the friction processing surface 78. The portion is continuously heated, and as a result, the same number of portions 78 b heated in parallel with the longitudinal direction of the base film 71 are formed on the friction treatment surface 78 of the base film 78.
[0047]
On the other hand, the heating means 80 shown in FIG. 5 has a gear 84 made of metal and a support shaft 82, and the support shaft 82 is inserted into the center of the gear 84. Teeth 86 are provided on the surface of the gear 84. The gear 84 is rotatably mounted with the support shaft 82 as a central axis.
[0048]
A process of heat-treating the base film 91 subjected to the friction process in the same process as in FIG. 1 of the above-described embodiment using the heating means 80 will be described. First, the heating means 80 is heated to a predetermined temperature using a heating means not shown. To the friction-treated surface 98 of the base film 91. In this state, when the base film 91 is moved in a direction perpendicular to the central axis of the heating means 80 and the gear 84 is rotated at a constant speed without being separated from the base film 91, it contacts the teeth 86 of the gear 84 on the friction processing surface 98. The heated part is continuously heated. As a result, the same number of teeth 98 b as the teeth 86 are formed on the friction-treated surface 98 of the base film 91.
[0049]
Therefore, an adhesive layer is formed on the friction treatment surfaces 78 and 98 of the base films 71 and 91 heated by the heating means 60 and 80 as described above, and the release sheet is formed as shown in FIG. When this adhesive layer is partially peeled off, a groove-like adhesive layer parallel to the longitudinal direction of the adhesive sheet is formed on the base film 71 heat-treated by the heating means 60 of FIG. 4, and the heating means 80 of FIG. In the base film 91 that has been heat-treated in step 1, an adhesive layer is formed in a groove shape perpendicular to the longitudinal direction of the adhesive sheet. Any of the heating means can continuously heat-treat the substrate film and can be used for mass production.
[0050]
【The invention's effect】
An adhesive sheet in which an adhesive layer is partially formed on the substrate film can be produced. Further, since this pressure-sensitive adhesive sheet is composed of a biodegradable substance, the use of this pressure-sensitive adhesive sheet provides a dust removal device that has a high dust removal effect and can be easily discarded.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a method for producing an adhesive tape of the present invention. FIG. 2 (a) to (e): a diagram for explaining a method for producing an adhesive tape of the present invention. FIG. 4 is a diagram for explaining a heating means used in the present invention. FIG. 5 is a diagram for explaining a heating means different from the above heating means. a) to (c): diagrams for explaining a method for producing an adhesive tape according to the prior art
DESCRIPTION OF SYMBOLS 11 ... Base film 13 ... Rod 14, 34 ... Adhesive layer 18 ... Friction processing surface 18a ... Heated part 18b ... Other part 20 ... Adhesive sheet 30 ... Peeling means 50 ... Dust removal tool 51 …… Base

Claims (8)

基体フィルム表面を摩擦手段によって擦り、摩擦処理面を形成した後、前記基体フィルムの摩擦処理面を部分的に加熱し、前記摩擦処理面に粘着層を形成し、前記粘着層表面に剥離手段を貼付した後、前記剥離手段を剥離させ、加熱された前記摩擦処理面上の前記粘着層を前記剥離手段に転着させ、部分的に粘着層が形成された粘着シートを得る粘着シート製造方法。Rubbing the base film surface by friction means, after forming the rubbing surface, said rubbing surface of the base film partially heated, the adhesive layer is formed on the rubbing surfaces, the separating means to the adhesive layer surface after sticking, the peeling means is peeling, heated the said adhesive layer on rubbing surfaces is transferred onto the peeling means, partly adhesive layer Ru obtained a PSA sheet is formed a pressure-sensitive adhesive sheet production method . 前記部分的な加熱は、昇温させた加熱手段を前記基体フィルムに接触させ、前記基体フィルムと前記加熱手段とを相対的に移動させながら行うことを特徴とする請求項1記載の粘着シート製造方法。  2. The pressure-sensitive adhesive sheet production according to claim 1, wherein the partial heating is performed while bringing the heated heating means into contact with the base film and relatively moving the base film and the heating means. Method. 前記加熱手段の温度は60℃以上100℃以下にすることを特徴とする請求項2記載の粘着シート製造方法。  The pressure-sensitive adhesive sheet manufacturing method according to claim 2, wherein the temperature of the heating means is 60 ° C. or higher and 100 ° C. or lower. 前記基体フィルムの少なくとも前記摩擦処理面が形成される面には、脂肪族ポリエステルフィルムを配置しておくことを特徴とする請求項1及至請求項3のいずれか項記載の粘着シート製造方法。At least wherein the surface rubbing surface is formed, according to claim 1及至adhesive sheet manufacturing method of any one of claims 3, characterized in that you place the aliphatic polyester film of the base film. 前記脂肪族ポリエステルフィルムは、ポリ乳酸フィルムであることを特徴とする請求項4記載の粘着シート製造方法。 The pressure-sensitive adhesive sheet manufacturing method according to claim 4, wherein the aliphatic polyester film is a polylactic acid film . 前記基体フィルムの前記摩擦処理面には、ポリイソプレンゴムを主成分とする粘着層を形成することを特徴とする請求項1及至請求項5いずれか項記載の粘着シート製造方法。The substrates are the rubbing surface of the film, according to claim 1及至adhesive sheet manufacturing method of any one of claims 5, characterized in that to form an adhesive layer mainly composed of polyisoprene rubber. 請求項1及至請求項6いずれか1項記載の粘着シート製造方法で作成された粘着シートと、
前記粘着シートの基体フィルムがその表面に配置された基台とを有する除塵器具。
A pressure-sensitive adhesive sheet created by the pressure-sensitive adhesive sheet production method of any one of claims 1及至claim 6,
A dust remover having a base on which a base film of the pressure-sensitive adhesive sheet is disposed.
前記基台は円筒形状であり、前記粘着シートが前記基台の外周に前記粘着層を外側に向けて巻かれた請求項7記載の除塵器具。  The dust removing device according to claim 7, wherein the base is cylindrical, and the adhesive sheet is wound around an outer periphery of the base with the adhesive layer facing outward.
JP32843299A 1999-11-18 1999-11-18 Adhesive sheet manufacturing method and dust removing device Expired - Fee Related JP4427144B2 (en)

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