JP2012177005A - Film with pressure-sensitive adhesive and method for producing the same - Google Patents
Film with pressure-sensitive adhesive and method for producing the same Download PDFInfo
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- JP2012177005A JP2012177005A JP2011039585A JP2011039585A JP2012177005A JP 2012177005 A JP2012177005 A JP 2012177005A JP 2011039585 A JP2011039585 A JP 2011039585A JP 2011039585 A JP2011039585 A JP 2011039585A JP 2012177005 A JP2012177005 A JP 2012177005A
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Abstract
Description
本発明は粘着剤付フィルム及びその製造方法に関する。 The present invention relates to a film with an adhesive and a method for producing the same.
近年、プラスチックフィルムはその加工性、透明性などに加えて、軽量、安価といったことから、種々の産業で使用されており、液晶ディスプレイやタッチパネル用としても広く用いられている。 In recent years, plastic films have been used in various industries because they are lightweight and inexpensive in addition to their processability and transparency, and are also widely used for liquid crystal displays and touch panels.
最近ではプラスチックフィルムの傷つき防止として、多官能アクリレートモノマーを主成分とした活性エネルギー線硬化型樹脂組成物をプラスチックフィルムに塗工したハードコートフィルムが用いられており、このようなフィルムを積層する目的で、背面に粘着層を設けたものが用いられている。このようなフィルムの加工においては、通常、ロール状の基材フィルムを巻き出し、連続的に活性エネルギー線硬化型樹脂組成物を塗布、硬化させた後、さらにロール状に巻き取るという方法が取られている。粘着剤の塗布も同様である。 Recently, a hard coat film in which an active energy ray-curable resin composition mainly composed of a polyfunctional acrylate monomer is applied to a plastic film is used to prevent damage to the plastic film. And what provided the adhesion layer in the back is used. In the processing of such a film, a method is usually employed in which a roll-shaped substrate film is unwound, the active energy ray-curable resin composition is continuously applied and cured, and further wound into a roll. It has been. The same applies to the application of the adhesive.
しかしながら、粘着剤は樹脂硬化物と比較して、相対的に柔らかいため、粘着塗布後に巻き取った際に、環境異物の混入による打痕や巻き締まりによるオレンジピールの発生が避けられない。このような問題を解決する目的で、粘着塗布後の巻き取りの際に、基材フィルム両端部にスペーサーを挿入し、フィルムを浮かせて巻くという方法が取られる。 However, since the pressure-sensitive adhesive is relatively soft compared to the cured resin, it is inevitable to generate dents due to the mixing of environmental foreign matter and orange peel due to tightening when wound after application of the pressure-sensitive adhesive. In order to solve such a problem, a method of inserting a spacer at both ends of the base film and winding the film while taking up after the adhesive coating is taken.
また、近年、ハードコートフィルムの傷つき防止性能の要求は高まっており、これに応えるため、樹脂組成物の塗布厚みを厚くするという方法があるが、塗布厚みが厚いと、表面張力の影響でフィルム両端部の厚みが著しく厚くなるため、巻姿が不安定になり、巻ずれが発生しやすくなる。これを回避するため、両端部をスリットする方法があるが、歩留まりが低下するためコストアップに繋がる。 In recent years, the demand for hard coat film damage prevention performance has increased, and in order to meet this demand, there is a method of increasing the coating thickness of the resin composition, but if the coating thickness is large, the film is affected by the surface tension. Since the thickness of both ends becomes extremely large, the winding form becomes unstable and winding deviation easily occurs. In order to avoid this, there is a method of slitting both ends, but the yield is lowered, leading to an increase in cost.
本発明は基材フィルムの片面に活性エネルギー線硬化型樹脂組成物を塗布、硬化させた後、他方の面に粘着剤を塗布し、離型フィルムを貼り合わせ、硬化させる粘着剤付フィルムにおいて、前記基材フィルムの両端部に前記活性エネルギー線硬化型樹脂組成物及び前記粘着剤の未塗布領域を設けて巻き取られてなることを特徴とする粘着剤付フィルム及びその製造方法である。 In the film with pressure-sensitive adhesive, the active energy ray-curable resin composition is applied to one side of the base film and cured, and then the pressure-sensitive adhesive is applied to the other side, the release film is bonded, and cured. A film with a pressure-sensitive adhesive and a method for producing the same, wherein the active energy ray-curable resin composition and the pressure-sensitive adhesive are not coated on both ends of the base film.
本発明の製造方法に従えば、ロール状に巻き取った際の巻ずれを防止しながら、両端部に挿入されたスペーサーがフィルムを支えることで粘着面にかかる圧力が大幅に緩和され、粘着層の変形が抑えられ、さらに輸送中においても粘着層の変形が抑えられる表面平滑性の高い外観の優れた粘着剤付フィルムを提供することができる。 According to the production method of the present invention, the pressure applied to the adhesive surface is greatly relieved by supporting the film with the spacers inserted at both ends while preventing winding slippage when wound into a roll, and the adhesive layer Thus, it is possible to provide a film with a pressure-sensitive adhesive having an excellent appearance with high surface smoothness, in which the deformation of the pressure-sensitive adhesive layer is suppressed even during transportation.
本発明を図面に基づいて説明すれば、基材フィルムの片面に活性エネルギー線硬化型樹脂組成物を、硬化後の厚みが５μｍ以上となるように塗布、硬化させた後、もう一方の面に粘着剤を塗布し、離型フィルムを貼り合わせ、硬化させることによって粘着剤付フィルムの製造する際、図１のように、基材フィルムの両端部に活性エネルギー線硬化型樹脂組成物及び粘着剤の未塗布領域を設け、さらに、図２のように、粘着塗布後にロール状に巻き取る際に、上記未塗布領域にスペーサーを挟み込みながら巻き取る。 The present invention will be described with reference to the drawings. An active energy ray-curable resin composition is applied and cured on one side of a base film so that the thickness after curing is 5 μm or more, and then on the other side. When producing a film with a pressure-sensitive adhesive by applying a pressure-sensitive adhesive, bonding a release film, and curing, an active energy ray-curable resin composition and a pressure-sensitive adhesive are formed at both ends of the base film as shown in FIG. In addition, as shown in FIG. 2, when winding in a roll shape after application of adhesive, the uncoated region is wound while sandwiching a spacer in the uncoated region.
本発明に用いる基材フィルムの素材は特に限定されず、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレン、ポリプロピレン、ナイロン６、ナイロン６６、ジアセチルセルロース、トリアセチルセルロース、アセチルセルロースブチレート、セロファン、ポリスチレン、ポリアリレート、ポリカーボネート、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリメチルテルペン、ポリエーテルスルフォン、ポリメタクリル酸メチル、ポリビニルアルコール、ポリイミド、ポリシクロオレフィン、アクリル等を用いることができる。 The material of the base film used in the present invention is not particularly limited, and polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, nylon 6, nylon 66, diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, cellophane, polystyrene, polyarylate Polycarbonate, polyvinyl chloride, polyvinylidene chloride, polymethyl terpene, polyether sulfone, polymethyl methacrylate, polyvinyl alcohol, polyimide, polycycloolefin, acrylic and the like can be used.
本発明に用いる活性エネルギー線硬化型樹脂組成物は、多官能アクリレートまたは多官能アクリルオリゴマーなどのように、活性エネルギー線の照射によって硬化可能な化合物を含有し、必要に応じて光重合開始剤を配合する。また塗布外観を良くするために、溶剤で希釈してもよい。具体的な製品としてはアイカ工業株式会社製アイカアイトロンＺ−７２７（商品名）などが挙げられる。 The active energy ray-curable resin composition used in the present invention contains a compound that can be cured by irradiation with active energy rays, such as a polyfunctional acrylate or polyfunctional acrylic oligomer, and a photopolymerization initiator as necessary. Blend. In order to improve the coating appearance, it may be diluted with a solvent. Specific examples include Aika Eyetron Z-727 (trade name) manufactured by Aika Industry Co., Ltd.
活性エネルギー線硬化型樹脂組成物の塗布において、塗布厚みは硬化後５μｍ以上とし、フィルム両端部に５〜３０ｍｍ巾の未塗布領域を設ける。塗布方法は特に制限はなく、公知の方法、例えばグラビアコート法、バーコート法、ナイフコート法、ロールコート法、ブレードコート法、ダイコート法などを用いることができる。 In application | coating of an active energy ray hardening-type resin composition, application | coating thickness shall be 5 micrometers or more after hardening, and a 5-30 mm width non-application | coating area | region is provided in the film both ends. A coating method is not particularly limited, and a known method such as a gravure coating method, a bar coating method, a knife coating method, a roll coating method, a blade coating method, or a die coating method can be used.
本発明に用いる粘着剤は特に限定されず、アクリル系、ゴム系、または、シリコーン系粘着剤などを用いることができる。必要によって溶剤で希釈したものでもよい。 The pressure-sensitive adhesive used in the present invention is not particularly limited, and an acrylic, rubber-based, or silicone-based pressure-sensitive adhesive can be used. If necessary, it may be diluted with a solvent.
粘着剤の塗布においても、基材フィルム両端部に未塗布領域を設ける。塗布方法、塗布厚みに関しては、特に制限はなく、公知の方法、例えばグラビアコート法、バーコート法、ナイフコート法、ロールコート法、ブレードコート法、ダイコート法などを用いることができる。 Even in the application of the adhesive, uncoated areas are provided at both ends of the base film. There are no particular restrictions on the coating method and coating thickness, and known methods such as gravure coating, bar coating, knife coating, roll coating, blade coating, and die coating can be used.
粘着塗布後、ロール状に巻き取る際は、活性エネルギー線硬化型樹脂組成物の両端部の未塗布領域にスペーサーを挿入しながら巻き取る。スペーサーの素材はクッション性があれば特に限定されず、ポリエステル、ポリエチレン、ポリプロピレン、セロファン、ジアセチルセルロース、トリアセチルセルロース、ポリカーボネート、アクリルなどのプラスチックフィルム、銅箔、ステンレス箔などの金属箔、紙、あるいはこれらの積層体などを用いることができる。なかでもプラスチックフィルムがクッション性があり、巻きほどく際の離型がよく好ましい。スペーサーは未塗布領域よりも幅の狭いものを用いる。スペーサーの厚みは活性エネルギー線硬化型樹脂硬化物と粘着剤の合計厚みよりも、厚いもの、上限は合計厚みの２倍未満、を用いてクッション性を持たせる。 After winding the adhesive, when winding it into a roll, it is wound while inserting spacers in the uncoated areas at both ends of the active energy ray-curable resin composition. The material of the spacer is not particularly limited as long as it has cushioning properties, polyester, polyethylene, polypropylene, cellophane, diacetyl cellulose, triacetyl cellulose, polycarbonate, acrylic and other plastic films, copper foil, stainless steel foil and other metal foil, paper, or These laminates can be used. Among these, a plastic film has cushioning properties, and release during winding is good and preferable. A spacer having a width smaller than that of the uncoated area is used. The spacer is thicker than the total thickness of the active energy ray-curable resin cured product and the pressure-sensitive adhesive, and the upper limit is less than twice the total thickness to provide cushioning properties.
以下、本発明について実施例、比較例を挙げてより詳細に説明するが、具体例を示すものであって特にこれらに限定するものではない。 EXAMPLES Hereinafter, although an Example and a comparative example are given and demonstrated in detail about this invention, a specific example is shown and it does not specifically limit to these.
実施例１
ポリエステルフィルム（東レ株式会社製、商品名 １２５Ｕ４８３、厚み１２５μｍ、幅１３２０ｍｍ）に、乾燥、硬化後の厚みが８μｍとなるように活性エネルギー線硬化型樹脂組成物（アイカ工業株式会社製、商品名 アイカアイトロンＺ−７２７、不揮発分５０％）を塗布した。塗布方法はグラビアコート法を用い、上記樹脂組成物を不揮発分４２％に希釈した上で、８５線のグラビアロールを使用し、ライン速度２２ｍ／ｍｉｎ、周速比５０〜７０％の条件で塗布した。この際、フィルム両端部より２０ｍｍを未塗布領域とした。該フィルムを乾燥させ、紫外線を照射することでフィルムの片面に樹脂硬化物が塗布されたフィルムを得た。該フィルムの反対面に粘着剤を乾燥後の厚みが１８μｍとなるように塗布した。この際、フィルム両端部より２０ｍｍを未塗布領域とした。該フィルムを乾燥させた後、離型フィルムを貼り合わせ、巻き取りの際に未塗布領域にスペーサーとして、厚み５０μｍ、幅１０ｍｍのポリエステルフィルムを挿入しながら巻き取り、５００ｍ巻のロールを作製した。続いて常温で１週間の養生を行い、粘着剤を硬化させた。
Example 1
Active energy ray-curable resin composition (trade name: Aika Kogyo Co., Ltd., manufactured by Toray Industries, Inc., trade name: 125U483, thickness: 125 μm, width: 1320 mm) so that the thickness after drying and curing is 8 μm. Itron Z-727 (non-volatile content 50%) was applied. The application method is a gravure coating method, after diluting the resin composition to a non-volatile content of 42%, using an 85-line gravure roll, and applying at a line speed of 22 m / min and a peripheral speed ratio of 50 to 70%. did. At this time, 20 mm from both ends of the film was defined as an uncoated region. The film was dried and irradiated with ultraviolet rays to obtain a film having a cured resin applied on one side of the film. The pressure-sensitive adhesive was applied to the opposite surface of the film so that the thickness after drying was 18 μm. At this time, 20 mm from both ends of the film was defined as an uncoated region. After the film was dried, a release film was bonded, and the film was wound up while inserting a polyester film having a thickness of 50 μm and a width of 10 mm as a spacer in an uncoated area at the time of winding to prepare a roll of 500 m. Subsequently, curing was carried out at room temperature for 1 week to cure the adhesive.
比較例１
実施例１において、活性エネルギー線硬化型樹脂組成物の未塗布領域を設けないこと以外は実施例１と同様に実施した。
Comparative Example 1
In Example 1, it implemented like Example 1 except not providing the uncoated area | region of an active energy ray hardening-type resin composition.
比較例２
実施例１において、粘着塗布後の巻き取り時にスペーサーを挿入せずに巻き取った以外は実施例１と同様に実施した。
Comparative Example 2
In Example 1, it carried out like Example 1 except having wound up without inserting a spacer at the time of winding up after adhesion application.
比較例３
実施例１において、樹脂組成物の未塗布領域を設けないこと、及び粘着塗布後の巻き取り時にスペーサーを挿入せずに巻き取ったこと以外は実施例１と同様に実施した。
Comparative Example 3
In Example 1, it carried out similarly to Example 1 except not providing the non-application area | region of a resin composition, and having wound up without inserting a spacer at the time of winding after adhesive application.
凹み欠陥
ロールから長さ１ｍのシートサンプルを切り出し、蛍光灯下目視にて凹み欠陥の個数を数えた。
Indentation defect A sheet sample having a length of 1 m was cut out from the roll, and the number of indentation defects was counted by visual observation under a fluorescent lamp.
オレンジピール
ロールから長さ１ｍのシートサンプルを切り出し、蛍光灯下目視にて粘着面を観察し、オレンジピール状の凹凸感のある面荒れを、強、中、弱、無し、の４段階で評価した。
Cut out a 1m long sheet sample from the orange peel roll and visually observe the adhesive surface under a fluorescent lamp. did.
巻ずれ発生率
同一条件でロールを１０本作製し、巻き取り時に２０ｍｍ以上の巻ずれが発生したロールの割合を算出した。
Winding occurrence rate Ten rolls were produced under the same conditions, and the ratio of rolls in which winding deviation of 20 mm or more occurred during winding was calculated.
実施例１、比較例１は巻き取り時にスペーサーを挿入することにより、比較例２、３と比較し、凹み欠陥、オレンジピールが大幅に低減している。比較例１はフィルム両端部まで樹脂組成物が塗布された状態でスペーサーを挿入したため、実施例１と比較し、巻ずれ発生率が増加している。 In Example 1 and Comparative Example 1, by inserting a spacer at the time of winding, compared to Comparative Examples 2 and 3, dent defects and orange peel are greatly reduced. In Comparative Example 1, since the spacer was inserted in a state where the resin composition was applied to both ends of the film, the occurrence rate of winding deviation was increased as compared with Example 1.
１ 未塗工領域
1 Uncoated area
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011039585A JP2012177005A (en) | 2011-02-25 | 2011-02-25 | Film with pressure-sensitive adhesive and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011039585A JP2012177005A (en) | 2011-02-25 | 2011-02-25 | Film with pressure-sensitive adhesive and method for producing the same |
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| Publication Number | Publication Date |
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| JP2012177005A true JP2012177005A (en) | 2012-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2011039585A Withdrawn JP2012177005A (en) | 2011-02-25 | 2011-02-25 | Film with pressure-sensitive adhesive and method for producing the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015066769A (en) * | 2013-09-27 | 2015-04-13 | 凸版印刷株式会社 | Heat-sensitive transfer sheet and intermediate in winding form thereof |
| JP2017171849A (en) * | 2016-03-25 | 2017-09-28 | リンテック株式会社 | Adhesive film roll and manufacturing method therefor, method for suppressing deviation in winding of adhesive film and method for predicting size of deviation in winding of adhesive film |
-
2011
- 2011-02-25 JP JP2011039585A patent/JP2012177005A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015066769A (en) * | 2013-09-27 | 2015-04-13 | 凸版印刷株式会社 | Heat-sensitive transfer sheet and intermediate in winding form thereof |
| JP2017171849A (en) * | 2016-03-25 | 2017-09-28 | リンテック株式会社 | Adhesive film roll and manufacturing method therefor, method for suppressing deviation in winding of adhesive film and method for predicting size of deviation in winding of adhesive film |
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