JP2009249582A - Pressure-sensitive adhesive film - Google Patents

Pressure-sensitive adhesive film Download PDF

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Publication number
JP2009249582A
JP2009249582A JP2008102043A JP2008102043A JP2009249582A JP 2009249582 A JP2009249582 A JP 2009249582A JP 2008102043 A JP2008102043 A JP 2008102043A JP 2008102043 A JP2008102043 A JP 2008102043A JP 2009249582 A JP2009249582 A JP 2009249582A
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Japan
Prior art keywords
film
pressure
sensitive adhesive
air
adhesive
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JP2008102043A
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Ryoichi Oguro
亮一 大黒
Shuji Kametani
修史 亀谷
Masaya Bessho
正也 別所
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Daiwa Kasei Shoji KK
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Daiwa Kasei Shoji KK
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Priority to JP2008102043A priority Critical patent/JP2009249582A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive film capable of preventing air from being caught between an adhered face and the pressure-sensitive adhesive film, or hardly catching the air, by solving problems wherein a protection film is bonded sometimes while catching the air when bonded onto the adhered face, wherein air bubbles are difficult to be fed out by a roll or the like when the large number of air bubbles is caught, and wherein air-free bonding is difficult, in the protection film bonded to prevent an article from being flawed until transferring the article to a final consumer, and separated by the final consumer or a final execution person. <P>SOLUTION: This pressure-sensitive adhesive film is a film 1 applied with an adhesive containing a particle 3 onto a base material film 2, wherein 50 wt.% or more of the particle has a diameter of 80-120% of an applied thickness of the adhesive 4, and a content of the particle is 5 to 30 pts.wt. per 100 pts.wt. of the adhesive. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、粘着フィルムに関するものである。   The present invention relates to an adhesive film.

粘着フィルムとは、プラスチックフィルムの裏面に粘着剤が塗布されたもので、基本的には最終的に剥離するものである。
これの代表例として保護フィルムがある。これは、商品が最終消費者の手に渡るまで、商品に傷がつかないように貼付しておき、最終消費者や最終施工者が剥離するものである。
The pressure-sensitive adhesive film is a film in which a pressure-sensitive adhesive is applied to the back surface of a plastic film and is basically peeled finally.
A representative example of this is a protective film. This means that the product is affixed so that the product is not damaged until the product reaches the hand of the final consumer, and the final consumer or the final contractor peels off.

例えば、液晶面を有する商品の液晶ディスプレイ構成材料には必ずと言っていいほど、この保護フィルムが貼付されている。   For example, this protective film is affixed to a liquid crystal display constituent material of a product having a liquid crystal surface.

この保護フィルムは、被保護面に貼付するのであるが、この時空気を巻き込んで貼付されることが多い。空気泡が多数巻き込まれると、ロール等で送り出そうとしても非常に難しい。また、空気を巻き込まないように貼ることも難しい。   This protective film is affixed to the surface to be protected. At this time, the protective film is often affixed by involving air. When many air bubbles are involved, it is very difficult to send them out with a roll or the like. It is also difficult to apply the air so that it does not get in the air.

このような空気泡を巻き込んだまま、長期に粘着フィルムを貼り続けると、その空気泡の形が被保護面に痕跡として残り、被保護面の機能を阻害することとなる。   If the adhesive film is continuously applied for a long time with such air bubbles being involved, the shape of the air bubbles remains as a trace on the protected surface, and the function of the protected surface is impaired.

そこで、本発明では、被接着面と粘着フィルムとの間に空気を巻き込まない又は巻き込みにくい粘着フィルムを提供する。   Therefore, the present invention provides an adhesive film that does not entrain air or is difficult to entrain between the adherend surface and the adhesive film.

このような現状に鑑み、本発明者は鋭意研究の結果本発明粘着フィルムを完成したものであり、その特徴とするところは、基材フィルムに粒子を含有する粘着剤を塗布したフィルムであって、該粒子の50重量%以上は、該粘着剤の塗布厚みの80〜120%の直径を有するものであり、且つ該粒子の含有量は、粘着剤100重量部に対して5重量部から30重量部である点にある。   In view of the current situation, the present inventor has completed the adhesive film of the present invention as a result of earnest research, and the feature thereof is a film in which an adhesive containing particles is applied to a base film. 50% by weight or more of the particles have a diameter of 80 to 120% of the coating thickness of the pressure-sensitive adhesive, and the content of the particles is 5 to 30 parts by weight with respect to 100 parts by weight of the pressure-sensitive adhesive. It is in the point which is a weight part.

基材フィルムは、基本的にどのようなフィルムでもよい。透明でも不透明でもよい。着色されていても、半透明でもよい。
材質としては、ポリエステル、ポリエチレン等のポリオレフィン、ポリ塩化ビニル系、セルロース系等どのようなものでもよい。また厚みは自由であるが、10μm〜1mm程度である。
The base film may be basically any film. It may be transparent or opaque. It may be colored or translucent.
As the material, any material such as polyester, polyolefin such as polyethylene, polyvinyl chloride, or cellulose may be used. Moreover, although thickness is free, it is about 10 micrometers-1 mm.

粘着剤も特別なものである必要はなく従来のものでよい。例えば、ポリアクリル酸エステル系樹脂、ポリウレタン系、天然ゴム系、合成ゴム系、ポリシリコン系などである。   The pressure-sensitive adhesive need not be special and may be a conventional one. For example, polyacrylic ester resin, polyurethane, natural rubber, synthetic rubber, and polysilicon.

本発明では、この粘着剤に粒子を混合している。この粒子のサイズと粘着剤層の厚みとの関係が本発明のポイントである。
この粒子の50重量%以上は、粘着剤の塗布厚みの80〜120%の直径を有するものである。
In the present invention, particles are mixed in this pressure-sensitive adhesive. The relationship between the size of the particles and the thickness of the pressure-sensitive adhesive layer is the point of the present invention.
50% by weight or more of the particles have a diameter of 80 to 120% of the coating thickness of the pressure-sensitive adhesive.

この大半の粒子のサイズが、粘着剤の塗布厚みの80〜120%であるということが重要である。これによって、従来粘着剤に骨材やフィラーとして含有されている微粒子(0.1〜1μm程度)とはまったく別のものであることが明らかである。   It is important that the size of most of the particles is 80 to 120% of the coating thickness of the adhesive. As a result, it is clear that the fine particles (about 0.1 to 1 μm) conventionally contained as aggregates and fillers in the pressure-sensitive adhesive are completely different.

この80〜120という数字は、いろいろ変えて実験したが、80以下になると効果が小さくなり、120以上になると粘着性が悪くなる。勿論、90〜110%程度がより好適であり、理論的には100%が最高である。   This number of 80 to 120 was experimentally changed in various ways, but when it was 80 or less, the effect was reduced, and when it was 120 or more, the tackiness was deteriorated. Of course, about 90 to 110% is more preferable, and theoretically 100% is the highest.

また、微粒子は通常、単一の粒度のものは理論的に可能であっても、実際には入手困難である。ここでは、できるだけ粒度分布の狭い、即ちシャープな粒度曲線を有するものがいいことは間違いない。少なくとも、全量の50重量%以上は上記したサイズであることが必須である。これも種々実験したが、50重量%以下では、効果が小さかった。勿論、これは多くなればなるほど効果が上がるため、70重量%、80重量%のものがより好適である。   In addition, fine particles are usually difficult to obtain even though a single particle size is theoretically possible. Here, there is no doubt that a narrow particle size distribution, that is, a sharp particle size curve is preferable. At least 50% by weight or more of the total amount must be the above-mentioned size. Various experiments were conducted, but the effect was small at 50% by weight or less. Of course, since the effect increases as the amount increases, those of 70% by weight and 80% by weight are more preferable.

この粒子の含有量(粘着剤と粒子の混合比率)は、粘着剤100重量部に対して5重量部から30重量部である。これも実験から求めたもので、5以下では空気の泡の抜けが悪く、30以上では接着性が悪くなった。中でも、10重量部から25重量部が好適であった。
この粒子の効果は、数に依存すると思われるため、比重の大きいガラス等では重量混合比率は大きくなり、軽量のプラスチック粒等では重量混合比率は小さくなる。限定はしないが、ガラスでは15〜30重量%が好適であり、プラスチック製では5〜25重量%が好適であった。
The content of the particles (the mixing ratio of the pressure-sensitive adhesive and the particles) is 5 to 30 parts by weight with respect to 100 parts by weight of the pressure-sensitive adhesive. This was also obtained from an experiment. When it was 5 or less, air bubbles were not easily removed, and when it was 30 or more, adhesion was poor. Among these, 10 to 25 parts by weight was suitable.
Since the effect of the particles seems to depend on the number, the weight mixing ratio is large for a glass having a large specific gravity, and the weight mixing ratio is small for a lightweight plastic particle or the like. Although not limited, 15 to 30% by weight is suitable for glass, and 5 to 25% by weight is suitable for plastic.

この混合量も上記した粒子のサイズも、本発明効果を生じる保護フィルムの部分であり、基材フィルムの一部に本発明のような粘着剤を塗布し、一部は通常の粘着剤を塗布してもよい。   Both the amount of the mixture and the size of the particles described above are part of the protective film that produces the effect of the present invention. The adhesive as in the present invention is applied to a part of the base film, and the normal adhesive is applied in part. May be.

また、本発明の目的である、貼付時の空気の巻き込み防止という目的を持ったものも存在しない。即ち、このような観点から粘着シートを開発したものがないということである。
本発明フィルムは、空気の巻き込みが少ないだけでなく、巻き込んだ空気泡が簡単に抜けることも大きな特徴である。これらの理由や理論は定かではないが、大きな粒子が存在するため、それによって空気泡が細かく分断され被貼付物と粘着剤との間の各所から抜けていくと考えられる。
There is also no object with the object of preventing air entrainment at the time of sticking, which is an object of the present invention. In other words, no adhesive sheet has been developed from such a viewpoint.
The film of the present invention is not only less entrained with air but also has a great feature that the entrained air bubbles can be easily removed. Although these reasons and theories are not clear, it is considered that air bubbles are finely divided by the presence of large particles and escape from various places between the adherend and the adhesive.

このような粒子は完全に球形である必要なないが、鱗片状や棒状のものは好ましくない、少なくとも球に近い多角形状のようなものである。   Such particles need not be completely spherical, but scales and rods are not preferred, and are at least polygonal shapes close to spheres.

この粒子の材質は、自由であるがプラスチック製のものや無機質のものが好適である。プラスチックとしては、ポリメタクリレート系、ポリエチレンメタクリレート系、ポリスチレン系、ポリスチレンアクリル系、ポリエチレン系、ポリプロピレン系、ポリスチレンブタジエン系、ポリスチレンジビニルベンゼン系、ポリウレタン系、ポリベンゾグアナミン系、メラミン系等がよい。
また、無機質としては、ガラス、シリカ(ケイ酸塩鉱物)、炭酸カルシウム等が好適である。
The material of the particles is free but is preferably made of plastic or inorganic. As the plastic, polymethacrylate, polyethylene methacrylate, polystyrene, polystyrene acrylic, polyethylene, polypropylene, polystyrene butadiene, polystyrene divinylbenzene, polyurethane, polybenzoguanamine, melamine, and the like are preferable.
Further, as the inorganic material, glass, silica (silicate mineral), calcium carbonate and the like are preferable.

本発明粘着フィルムは、上記説明した保護フィルムとしてだけでなく、種々の用途に使用できる。   The adhesive film of the present invention can be used not only as the protective film described above but also for various applications.

本発明には次のような利点がある。
(1)被貼付物に本発明粘着フィルムを貼るときに、空気を巻き込むことがほとんどなく、非常に綺麗に貼ることができる。
(2)空気泡を巻き込んだ場合であっても、簡単に除去できる。
(3)空気泡を巻き込まないので、空気泡の痕跡が被貼付物に残らない。
The present invention has the following advantages.
(1) When sticking the pressure-sensitive adhesive film of the present invention on an object to be stuck, the air is hardly involved and can be put very neatly.
(2) Even when air bubbles are involved, they can be easily removed.
(3) Since air bubbles are not involved, traces of air bubbles do not remain on the adherend.

以下実施例に従って本発明をより詳細に説明する。   Hereinafter, the present invention will be described in more detail with reference to examples.

図1は、本発明粘着フィルム1の1例を示す概略断面図である。基材フィルム2に、粒子3を含有する粘着剤4を塗布したものである。粒子の直径と粘着剤の塗布厚みが同じである様子がわかる。しかし、実際にはこのように揃った微粒子はほとんど存在しないため、これは理想の図である。また、粒子の密度(フィルム上の単位面積中の数)も理想的に描いている。   FIG. 1 is a schematic sectional view showing an example of the pressure-sensitive adhesive film 1 of the present invention. An adhesive 4 containing particles 3 is applied to the base film 2. It can be seen that the diameter of the particles and the thickness of the adhesive applied are the same. However, in reality, there are almost no such fine particles, and this is an ideal view. Also ideally depicted is the density of the particles (number in unit area on the film).

図1が本発明の理想の状態であり、これで貼付時の空気の巻き込みがほとんどなくなる。上記した通り理由は定かではないが、実験結果から効果は明らかである。   FIG. 1 shows an ideal state of the present invention, and air entrainment at the time of sticking is almost eliminated. The reason is not clear as described above, but the effect is clear from the experimental results.

図1の例の基材フィルムはPET(ポリエチレンテレフタレート)の50μmのものであり、アクリル樹脂系粘着剤100重量部にアクリル製粒子(粒度の分布は4〜40μmであり、12〜14μmが54重量%のものを使用した)を15g混合したものを使用した。ここで塗工厚みは、15μmを目標に行なった。ほぼその厚みで塗布されていた。
ここで粒子の混合量を変化させて種々実験したが、樹脂100重量部に対して5g未満、また30gを越えると急激に効果が小さくなった。ここでも10gから25gの範囲が効果が大きかった。
The base film in the example of FIG. 1 is 50 μm of PET (polyethylene terephthalate), 100 parts by weight of acrylic resin-based adhesive and acrylic particles (particle size distribution is 4-40 μm, 12-14 μm is 54 weight) % Used) was used. Here, the coating thickness was set to 15 μm. It was applied at almost that thickness.
Various experiments were conducted by changing the mixing amount of the particles, but the effect was drastically reduced when the amount was less than 5 g or more than 30 g with respect to 100 parts by weight of the resin. Again, the range of 10 g to 25 g was very effective.

また、粒子径と塗布厚みを変えて実験した。粒子の粒度分布は1−〜70μmで、21〜27μmが52重量%のものを用いた。塗布厚みは25μmであった。樹脂に対する混合量も同じであった。
この例も大きな効果があった。
同様に混合量を変化させて行なったが、前記同様樹脂100重量部に対して5g未満、また30gを越えると効果が急激に小さくなり、10gから25gの範囲が効果が大きかった。
In addition, the experiment was performed by changing the particle diameter and the coating thickness. The particle size distribution of the particles was 1 to 70 μm, and 21 to 27 μm was 52% by weight. The coating thickness was 25 μm. The mixing amount with respect to the resin was the same.
This example also had a great effect.
Similarly, the mixing amount was changed, but the effect was drastically reduced when the amount was less than 5 g or 30 g with respect to 100 parts by weight of the resin, and the effect ranged from 10 g to 25 g.

図2は、塗布厚みより粒子が大きい例を示す。これでは、被貼付物に粘着剤が十分接触せず、粘着力が小さすぎて使用できなかった。
また、図3は、塗布厚みに対して粒子が小さい例を示す。これは、粘着剤に細かい骨材を入れた従来品に相当する。従来の粘着フィルムと同様、空気の巻き込みが多かった。
FIG. 2 shows an example in which the particles are larger than the coating thickness. With this, the adhesive did not sufficiently contact the adherend, and the adhesive strength was too small to be used.
FIG. 3 shows an example in which the particles are small with respect to the coating thickness. This corresponds to a conventional product in which fine aggregate is put in an adhesive. As with the conventional adhesive film, there was much air entrainment.

本発明粘着フィルムの1例を示す概略断面図である。It is a schematic sectional drawing which shows an example of this invention adhesive film. 粒子の大きすぎる例を示す概略断面図である。It is a schematic sectional drawing which shows the example with a too large particle | grain. 粒子の小さすぎる例を示す概略断面図である。It is a schematic sectional drawing which shows the example in which a particle | grain is too small.

符号の説明Explanation of symbols

1 本発明粘着フィルム
2 基材フィルム
3 粒子
4 粘着剤
1 Adhesive film of the present invention 2 Base film 3 Particle 4 Adhesive

Claims (1)

基材フィルムに粒子を含有する粘着剤を塗布したフィルムであって、該粒子の50重量%以上は、該粘着剤の塗布厚みの80〜120%の直径を有するものであり、且つ該粒子の含有量は、粘着剤100重量部に対して5重量部から30重量部であることを特徴とする粘着フィルム。
A film in which a pressure-sensitive adhesive containing particles is applied to a base film, wherein 50% by weight or more of the particles have a diameter of 80 to 120% of the coating thickness of the pressure-sensitive adhesive. Content is 5 to 30 weight part with respect to 100 weight part of adhesives, The adhesive film characterized by the above-mentioned.
JP2008102043A 2008-04-10 2008-04-10 Pressure-sensitive adhesive film Pending JP2009249582A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013130854A (en) * 2011-12-21 2013-07-04 Samsung Display Co Ltd Window for mobile device and mobile device including the same
EP2754705A1 (en) * 2013-01-09 2014-07-16 Uzin Tyro AG Self-adhesive film for bonding a covering

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08113768A (en) * 1994-10-06 1996-05-07 Minnesota Mining & Mfg Co <3M> Film capable of excluding air bubble
JP2000117861A (en) * 1998-10-15 2000-04-25 Bando Chem Ind Ltd Bonding sheet and its production
JP2001207154A (en) * 2000-01-27 2001-07-31 Toyo Chem Co Ltd Covering tape
JP2001240812A (en) * 2000-03-01 2001-09-04 Tombow Pencil Co Ltd Pressure-sensitive transfer adhesive tape
US20070248817A1 (en) * 2004-10-26 2007-10-25 Uzin Tyro Ag Self-Adhesive Film with Air Channels and/or Air Chambers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08113768A (en) * 1994-10-06 1996-05-07 Minnesota Mining & Mfg Co <3M> Film capable of excluding air bubble
JP2000117861A (en) * 1998-10-15 2000-04-25 Bando Chem Ind Ltd Bonding sheet and its production
JP2001207154A (en) * 2000-01-27 2001-07-31 Toyo Chem Co Ltd Covering tape
JP2001240812A (en) * 2000-03-01 2001-09-04 Tombow Pencil Co Ltd Pressure-sensitive transfer adhesive tape
US20070248817A1 (en) * 2004-10-26 2007-10-25 Uzin Tyro Ag Self-Adhesive Film with Air Channels and/or Air Chambers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013130854A (en) * 2011-12-21 2013-07-04 Samsung Display Co Ltd Window for mobile device and mobile device including the same
EP2754705A1 (en) * 2013-01-09 2014-07-16 Uzin Tyro AG Self-adhesive film for bonding a covering

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