JP2010077284A - Pressure-sensitive adhesive sheet roll - Google Patents

Pressure-sensitive adhesive sheet roll Download PDF

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JP2010077284A
JP2010077284A JP2008247292A JP2008247292A JP2010077284A JP 2010077284 A JP2010077284 A JP 2010077284A JP 2008247292 A JP2008247292 A JP 2008247292A JP 2008247292 A JP2008247292 A JP 2008247292A JP 2010077284 A JP2010077284 A JP 2010077284A
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pressure
sensitive adhesive
sheet
adhesive sheet
adhesive layer
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Yusuke Hashimoto
裕介 橋本
Takayuki Shibata
隆之 柴田
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive sheet roll which hardly causes a hit mark on a pressure-sensitive adhesive layer and can prevent displacement in winding. <P>SOLUTION: The pressure-sensitive adhesive sheet roll is obtained by winding on a core a belt-like pressure-sensitive adhesive sheet with release sheets separately laid on both surfaces of a pressure-sensitive adhesive layer, and slip sheets which are separately disposed near both ends of the pressure-sensitive adhesive sheet and are narrower than the pressure-sensitive adhesive sheet, wherein the pressure-sensitive adhesive sheet roll has at least one thickest part of the pressure-sensitive adhesive layer inside the slip sheets, and the ratio of the difference (S) between the thickest and thinnest parts of the pressure-sensitive adhesive layer to the thickness (T) of the slip sheets (S/T) is 0.1-0.5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、粘着シートロールに関し、さらに詳しくはPDP(プラズマディスプレイパネル)などのディスプレイの前面板等のガラス基体に貼り合わせて使用される、電磁波遮蔽フィルタ及び光学フィルタを含んでなる複合フィルタに用いるのに特に好適な粘着シートロールに関する。   The present invention relates to an adhesive sheet roll, and more particularly, to a composite filter including an electromagnetic wave shielding filter and an optical filter, which is used by being bonded to a glass substrate such as a front plate of a display such as a PDP (plasma display panel). It is related with the especially suitable adhesive sheet roll.

プラズマディスプレイパネルなどの画像表示装置の前面に配置される複合フィルタにおいて、各機能層を貼り合せるために用いられる粘着剤層は、多くの場合、粘着剤層を予め2枚の離型シート間に剥離可能に挟持した構成体から転写して形成される。以降、斯かる構成体を粘着シートと呼称する。そして、多くの場合、当該粘着シートは、連続帯状に製造され、一旦円筒型のロール状に巻き取られ保存される。   In a composite filter disposed on the front surface of an image display device such as a plasma display panel, the adhesive layer used to bond each functional layer is often the adhesive layer between two release sheets in advance. It is formed by transferring from a structure that is detachably held. Hereinafter, such a structure is referred to as an adhesive sheet. And in many cases, the said adhesive sheet is manufactured in the shape of a continuous belt, and is once wound up and preserve | saved at cylindrical roll shape.

上記粘着シートの製造工程において、異物が当該粘着シートの表面に付着した場合、当該粘着シートを巻き取った時に生じる圧力によって粘着剤層に塑性変形が生じ、回復しないまま、いわゆる打痕或は圧痕と呼ばれる凹部を生じる。当該打痕が存在する粘着シートを使用して、ディスプレイ前面に配置される複合フィルタなどを作製すると、当該打痕によって画像の微小な歪み等が生じ、ディスプレイの表示品位を低下させる要因となっていた。   In the manufacturing process of the pressure-sensitive adhesive sheet, when a foreign substance adheres to the surface of the pressure-sensitive adhesive sheet, a plastic deformation occurs in the pressure-sensitive adhesive layer due to the pressure generated when the pressure-sensitive adhesive sheet is wound up. A recess called is produced. If a composite filter or the like disposed on the front surface of the display is produced using an adhesive sheet having the dent, the image causes a slight distortion of the image, which is a factor that deteriorates the display quality of the display. It was.

そこで、連続帯状のフィルムの両端部に粘着シートよりも狭幅の帯状のスペーサー(合紙)を介して巻き芯に巻き重ねられたフィルムロールが知られている(特許文献1)。当該フィルムロールは、フィルムの両端部にスペーサーを挿入して、当該フィルムを浮かしながら巻き重ねていくため、当該フィルムロールの幅方向中央部には、隙間乃至フィルム間に圧力がかからない部分が形成される。そのため、当該フィルムの間に混入した異物による打痕を生じ難くすることができる。
しかしながら、当該フィルムの両端部にスペーサーを挿入することで、巻き重ねられたフィルム間に隙間ができるため、当該フィルム間の摩擦力が低減し、横滑りし易くなり巻きずれによる蛇行が発生し、粘着シートロールが筍状に変形するという問題があった。
Therefore, a film roll is known in which both ends of a continuous belt-like film are wound around a winding core via a belt-like spacer (interleaf) having a width narrower than that of an adhesive sheet (Patent Document 1). Since the film roll is inserted with spacers at both ends of the film and the film is rolled up while being floated, a gap or a portion where no pressure is applied between the films is formed at the center in the width direction of the film roll. The Therefore, it is possible to make it difficult to generate dents due to foreign matters mixed between the films.
However, by inserting spacers at both ends of the film, a gap is formed between the wound films, so that the frictional force between the films is reduced, the sides are easily slipped, and meandering due to winding deviation occurs. There was a problem that the sheet roll was deformed into a bowl shape.

また、粘着剤層を介して一対の離型シートが積層された構成の連続帯状の粘着シートにおいて、当該粘着シートに用いられる離型シートは、基材シートの一方の面に離型剤層が積層され、当該離型剤層を内側にしてロール状に巻き取られ保存される。そして、粘着シートロールを製造する際に、ロール状の離型シートを巻き戻すと、当該離型剤層と接触していた基材シートの面にも当該離型剤が転移され、当該面は滑りやすくなっている。従って、このような離型シートを用いて製造される粘着シートは、その両表面が離型剤の転写された滑りやすい面となるため、当該粘着シートをロール状に巻芯に巻き重ねる際に巻きずれが発生しやすくなる。   Moreover, in the continuous belt-like pressure-sensitive adhesive sheet having a configuration in which a pair of release sheets are laminated via a pressure-sensitive adhesive layer, the release sheet used for the pressure-sensitive adhesive sheet has a release agent layer on one surface of the base sheet. Laminated and wound up and stored in a roll shape with the release agent layer inside. And, when producing the pressure-sensitive adhesive sheet roll, when the roll-shaped release sheet is rewound, the release agent is also transferred to the surface of the base material sheet that has been in contact with the release agent layer, It is slippery. Accordingly, the pressure-sensitive adhesive sheet produced using such a release sheet has a slippery surface to which the release agent is transferred, so that when the pressure-sensitive adhesive sheet is wound around a roll core in a roll shape. Winding deviation is likely to occur.

特開2004−199643号公報Japanese Patent Laid-Open No. 2004-199643

本発明は上記問題点を鑑みてなされたものであり、粘着剤層に打痕を生じ難くするとともに、巻きずれを防止することができる粘着シートロールを提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a pressure-sensitive adhesive sheet roll that can hardly cause dents in the pressure-sensitive adhesive layer and can prevent winding slippage.

本発明者らは、鋭意検討の結果、粘着シートの両端部近傍に合紙を設け、且つ、粘着剤層の幅方向の膜厚分布を特定の範囲とすることにより、上記課題が解決されるという知見を見出し、本発明を完成させるに至った。
すなわち、本発明に係る粘着シートロールは、粘着剤層の両面に離型シートが積層された帯状の粘着シートと、当該粘着シートの両端部近傍に設けられた当該粘着シートよりも狭幅の合紙とが巻き芯に巻き重ねられた粘着シートロールにおいて、
前記合紙より内側に、前記粘着剤層の膜厚の最も厚い部分を少なくとも1つ以上有し、且つ、当該粘着剤層の膜厚の最も厚い部分と最も薄い部分との差(S)と、前記合紙の厚み(T)との比(S/T)が0.1〜0.5であることを特徴とする。
As a result of intensive studies, the present inventors have solved the above problem by providing a slip sheet in the vicinity of both ends of the pressure-sensitive adhesive sheet and setting the thickness distribution in the width direction of the pressure-sensitive adhesive layer to a specific range. As a result, the present invention has been completed.
That is, the pressure-sensitive adhesive sheet roll according to the present invention includes a belt-shaped pressure-sensitive adhesive sheet in which release sheets are laminated on both sides of a pressure-sensitive adhesive layer, and a narrower width than the pressure-sensitive adhesive sheet provided near both ends of the pressure-sensitive adhesive sheet. In the pressure-sensitive adhesive sheet roll in which paper is wound around the core,
The difference (S) between the thickest part and the thinnest part of the pressure-sensitive adhesive layer having at least one thickest part of the pressure-sensitive adhesive layer on the inner side of the slip sheet The ratio (S / T) to the thickness (T) of the slip sheet is 0.1 to 0.5.

本発明の粘着シートロールは、粘着シートの両端部近傍に合紙を設けることで、当該合紙より内側において、隣接する粘着シート間に隙間が生じる。また、当該合紙より内側において、粘着剤層の膜厚の最も厚い部分を少なくとも1つ以上設け、且つ、当該粘着剤層の膜厚の最も厚い部分と最も薄い部分との差(S)と、前記合紙の厚み(T)との比(S/T)を上記特定の範囲とすることにより、当該粘着シート間に生じた隙間に、隣接する粘着シート同士が接触する部分ができ、当該粘着シート間の摩擦力が適度に付与される。これにより、当該粘着シートを巻き芯に巻き重ねる際に、当該粘着シートの間に混入した異物による打痕を生じ難くするとともに、横滑りによる巻きずれを防止することができる。   In the pressure-sensitive adhesive sheet roll of the present invention, a gap is formed between adjacent pressure-sensitive adhesive sheets on the inner side of the slip sheet by providing a slip sheet near both ends of the pressure-sensitive adhesive sheet. Further, on the inner side of the interleaving paper, at least one or more thickest part of the pressure-sensitive adhesive layer is provided, and the difference (S) between the thickest part and the thinnest part of the pressure-sensitive adhesive layer By setting the ratio (S / T) to the thickness (T) of the slip sheet as the above specific range, there is a portion where the adjacent adhesive sheets contact each other in the gap generated between the adhesive sheets, A frictional force between the pressure-sensitive adhesive sheets is moderately applied. Thereby, when winding up the said adhesive sheet on a core, it can make difficult to produce the dent by the foreign material mixed between the said adhesive sheets, and can prevent winding slip by side slip.

本発明に係る粘着シートロールにおいては、前記合紙より内側の領域において、前記粘着剤層の幅方向の全長に対する、当該合紙を挟む前記粘着シート同士が接触する長さ比が、0.01〜0.6の範囲内であることが、粘着剤層への打痕防止と巻きずれ防止を両立する点から好ましい。   In the pressure-sensitive adhesive sheet roll according to the present invention, in the region inside the slip sheet, the length ratio of the pressure-sensitive adhesive sheets sandwiching the slip sheet to the total length in the width direction of the pressure-sensitive adhesive layer is 0.01. It is preferable that it is in the range of ~ 0.6 from the viewpoint of achieving both prevention of dents on the pressure-sensitive adhesive layer and prevention of winding deviation.

本発明に係る粘着シートロールにおいては、前記合紙の厚みが6μm〜12μmの範囲内であることが、粘着剤層への打痕防止と巻きずれ防止を両立する点から好ましい。   In the pressure-sensitive adhesive sheet roll according to the present invention, it is preferable that the thickness of the slip sheet is in the range of 6 μm to 12 μm from the viewpoint of achieving both the prevention of dents on the pressure-sensitive adhesive layer and the prevention of winding slippage.

本発明の粘着シートロールは、粘着シートの両端部近傍に合紙を設け、且つ、粘着剤層の幅方向の膜厚分布を特定の範囲とすることにより、粘着シート間に生じた隙間に、隣接する粘着シート同士が接触する部分が生じ、当該粘着シート間の摩擦力が適度に付与される。これにより、当該粘着シートを巻き芯に巻き重ねる際に、当該粘着シートの間に混入した異物による打痕を生じ難くするとともに、横滑りによる巻きずれを防止することができる。   The pressure-sensitive adhesive sheet roll of the present invention is provided in the vicinity of both ends of the pressure-sensitive adhesive sheet, and by setting the thickness distribution in the width direction of the pressure-sensitive adhesive layer to a specific range, The part which adjacent adhesive sheets contact will arise, and the frictional force between the said adhesive sheets is provided moderately. Thereby, when winding up the said adhesive sheet on a core, it can make difficult to produce the dent by the foreign material mixed between the said adhesive sheets, and can prevent winding slip by side slip.

以下において、本発明を詳しく説明する。
<粘着シートロール>
本発明に係る粘着シートロールは、粘着剤層の両面に離型シートが剥離可能に積層された帯状の粘着シートと、当該粘着シートの両端部近傍に設けられた合紙とが巻き芯に巻き重ねられた粘着シートロールにおいて、
前記合紙より内側に、前記粘着剤層の膜厚の最も厚い部分を少なくとも1つ以上有し、且つ、当該粘着剤層の膜厚の最も厚い部分と最も薄い部分との差(S)と、前記合紙の厚み(T)との比(S/T)が0.1〜0.5であることを特徴とする。
In the following, the present invention will be described in detail.
<Adhesive sheet roll>
In the pressure-sensitive adhesive sheet roll according to the present invention, a belt-shaped pressure-sensitive adhesive sheet in which a release sheet is releasably laminated on both surfaces of a pressure-sensitive adhesive layer, and a slip sheet provided near both ends of the pressure-sensitive adhesive sheet are wound around a winding core. In the stacked adhesive sheet roll,
The difference (S) between the thickest part and the thinnest part of the pressure-sensitive adhesive layer having at least one thickest part of the pressure-sensitive adhesive layer on the inner side of the slip sheet The ratio (S / T) to the thickness (T) of the slip sheet is 0.1 to 0.5.

本発明の粘着シートロールは、離型シートの両端部近傍に合紙を設けることで、当該合紙より内側において、隣接する粘着シート間に隙間が生じる。また、当該合紙より内側において、粘着剤層の膜厚の最も厚い部分を少なくとも1つ以上設け、且つ、当該粘着剤層の膜厚の最も厚い部分と最も薄い部分との差(S)と、前記合紙の厚み(T)との比(S/T)を0.1〜0.5とすることにより、当該粘着シート間に生じた隙間に、隣接する粘着シート同士が接触する部分ができ、当該粘着シート間の摩擦力が適度に付与される。これにより、当該粘着シートを巻き芯に巻き重ねる際に、当該粘着シートの間に混入した異物による打痕を生じ難くする効果と、横滑りによる巻きずれを防止する効果という本来相反する効果を両立することができる。   In the pressure-sensitive adhesive sheet roll of the present invention, a gap is formed between adjacent pressure-sensitive adhesive sheets inside the slip sheet by providing the slip sheet in the vicinity of both ends of the release sheet. Further, on the inner side of the interleaving paper, at least one or more thickest part of the pressure-sensitive adhesive layer is provided, and the difference (S) between the thickest part and the thinnest part of the pressure-sensitive adhesive layer By setting the ratio (S / T) to the thickness (T) of the slip sheet to be 0.1 to 0.5, a portion where adjacent adhesive sheets are in contact with each other in a gap generated between the adhesive sheets is provided. The frictional force between the pressure-sensitive adhesive sheets is moderately applied. Thus, when the pressure-sensitive adhesive sheet is wound around the core, both the effect of making it difficult to produce a dent due to foreign matter mixed between the pressure-sensitive adhesive sheets and the effect of contradictory to each other such as the effect of preventing winding slippage due to skidding are achieved. be able to.

本発明に係る粘着シートロールは、幅が500mm〜1500mmの連続帯状の粘着シートを巻き芯に巻き重ねたものである。
以下、本発明の好適な実施の形態を図面に基づいて説明する。
図1は、本発明の粘着シートを、その幅方向両端部に合紙を備えて、巻き芯に巻き重ねられた状態を示したものである。粘着シート10は、矢印方向に供給され、当該帯状の粘着シート10の幅方向両端部近傍に当該粘着シートの全幅よりも狭幅で帯状の合紙11が、ロール状の原反(図示略)から巻き戻されて矢印方向に供給される。当該粘着シート10が、両端部近傍に合紙11を介在した状態で巻き芯12に巻き重ねられることにより、粘着シートロール1が形成される。
ここで、「端部近傍」とは、粘着シート10の端部から10mm乃至50mmの範囲内を意味する。上記範囲内とすることで、当該粘着シート10をロール状態から巻き戻して引き伸ばした時に、合紙11の跡がつき外観不良となる粘着シート面積が小さく有効製品面積を大きくすることができる。
The pressure-sensitive adhesive sheet roll according to the present invention is obtained by winding a continuous belt-shaped pressure-sensitive adhesive sheet having a width of 500 mm to 1500 mm around a winding core.
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
FIG. 1 shows a state in which the pressure-sensitive adhesive sheet of the present invention is provided on both ends in the width direction with interleaf and wound on a winding core. The pressure-sensitive adhesive sheet 10 is supplied in the direction of the arrow, and a belt-like interleaf paper 11 having a width narrower than the entire width of the pressure-sensitive adhesive sheet is provided in the vicinity of both ends in the width direction of the belt-like pressure-sensitive adhesive sheet 10 (not shown). Is unwound and supplied in the direction of the arrow. The pressure-sensitive adhesive sheet 10 is formed by winding the pressure-sensitive adhesive sheet 10 around the winding core 12 with the interleaf paper 11 interposed between both ends.
Here, “in the vicinity of the end” means within the range of 10 mm to 50 mm from the end of the adhesive sheet 10. By setting it within the above range, when the pressure-sensitive adhesive sheet 10 is unwound from the roll state and stretched, the area of the pressure-sensitive adhesive sheet with a trace of the interleaf paper 11 and a poor appearance can be reduced and the effective product area can be increased.

図2は、図1におけるA−A’断面の一部拡大図である。尚、図2に示す断面図において、説明の容易化のために、厚み方向(図の上下方向)の縮尺を幅方向(図の左右方向)の縮尺よりも大幅に拡大誇張して図示してある。粘着シート10は、粘着剤層13を介して一対の離型シート14が剥離可能に積層されている。隣接する粘着シート10の離型シート14間の両端部には、合紙11が設けられている。また、粘着シート10の両端部近傍に設けられた合紙11より内側において、隣接する粘着シート10の間に隙間15が形成されるとともに、粘着剤層13の膜厚の最も厚い部分が形成されており、当該隣接する粘着シート10の離型シート14同士が幅方向中央部近傍に於いて接触している。   FIG. 2 is a partially enlarged view of the A-A ′ cross section in FIG. 1. In the cross-sectional view shown in FIG. 2, the scale in the thickness direction (vertical direction in the figure) is greatly enlarged and exaggerated from the scale in the width direction (horizontal direction in the figure) for ease of explanation. is there. The pressure-sensitive adhesive sheet 10 is laminated such that a pair of release sheets 14 can be peeled through a pressure-sensitive adhesive layer 13. Interleaving paper 11 is provided at both ends between the release sheets 14 of the adjacent adhesive sheets 10. In addition, a gap 15 is formed between the adjacent adhesive sheets 10 and the thickest part of the adhesive layer 13 is formed inside the interleaf paper 11 provided in the vicinity of both ends of the adhesive sheet 10. The release sheets 14 of the adjacent pressure-sensitive adhesive sheets 10 are in contact with each other in the vicinity of the central portion in the width direction.

図3は、合紙11より内側における、粘着剤層13の膜厚分布の一例を示す模式的縦断面図である。図3も厚み方向の縮尺を幅方向の縮尺よりも大幅に拡大誇張して図示してある。粘着剤層13は、合紙11より内側において、膜厚の最も厚い部分(Sa)と膜厚の最も薄い部分(Sb)とを有する。例えば、合紙11より内側において、図3(a)に示す、端付近が最も膜厚の薄い部分(Sb)であり、且つ中央部付近に最も厚い部分(Sa)を有する山型形状、図3(b)に示す、端付近が最も膜厚の薄い部分(Sb)であり、且つ当該端付近と中央部付近との間に最も厚い部分(Sa)を有する山型形状、及び、図3(c)に示す、膜厚の厚い部分(Sa)を2つ有し、その間に最も膜厚の薄い部分(Sb)を有する2山からなる形状などが挙げられる。
本発明においては、粘着剤層13の膜厚の最も厚い部分(Sa)と最も薄い部分(Sb)との差(S)と、合紙の厚み(T)との比(S/T)が0.1〜0.5、好ましくは0.2〜0.4とする。上記の比(S/T)が0.1未満の場合、隣接する粘着シート同士が接触する面積が小さく、当該粘着シート間の摩擦力が不充分となり、当該粘着シートを巻き芯に巻き重ねる際に、横滑りによる巻きずれを発生する恐れがある。また、上記の比(S/T)が0.5超過の場合、隣接する粘着シート同士が接触する面積が大きく、当該粘着シートを巻き芯に巻き重ねた際に、当該粘着シートにかかる圧力が大きくなり、当該粘着シートの間に混入した異物による打痕を十分に防止することができない。
FIG. 3 is a schematic longitudinal sectional view showing an example of the film thickness distribution of the pressure-sensitive adhesive layer 13 inside the interleaf sheet 11. FIG. 3 also shows the scale in the thickness direction in a greatly enlarged and exaggerated manner in comparison with the scale in the width direction. The pressure-sensitive adhesive layer 13 has a thickest part (Sa) and a thinnest part (Sb) inside the interleaf sheet 11. For example, on the inner side of the slip sheet 11, as shown in FIG. 3A, a chevron shape having a thinnest part (Sb) near the edge and a thickest part (Sa) near the center, 3 (b), the chevron shape having the thinnest part (Sb) near the end and the thickest part (Sa) between the end and the central part, and FIG. Examples of the shape include two crests having two thick portions (Sa) shown in (c) and the thinnest portion (Sb) between them.
In the present invention, the ratio (S / T) between the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the adhesive layer 13 and the thickness (T) of the slip sheet is 0.1 to 0.5, preferably 0.2 to 0.4. When the ratio (S / T) is less than 0.1, the area where the adjacent adhesive sheets are in contact with each other is small, the frictional force between the adhesive sheets is insufficient, and the adhesive sheet is wound around the core. In addition, there is a risk of winding slippage due to skidding. Moreover, when said ratio (S / T) exceeds 0.5, the area which adjacent adhesive sheets contact is large, and when the said adhesive sheet is wound around a winding core, the pressure concerning the said adhesive sheet is It becomes large and the dent by the foreign material mixed between the said adhesive sheets cannot fully be prevented.

また、本発明においては、前記合紙より内側の領域において、前記粘着剤層の幅方向の全長に対する、当該合紙を挟む前記粘着シート同士が接触する長さ比が、0.01〜0.6の範囲内であることが好ましく、更に、0.2〜0.5の範囲内であることが好ましい。上記長さ比が0.01未満の場合、隣接する粘着シート同士が接触する面積が小さく、当該粘着シート間の摩擦力が不充分となり、当該粘着シートを巻き芯に巻き重ねる際に、横滑りによる巻きずれを発生する恐れがある。また、上記長さ比が0.6超過の場合、隣接する粘着シート同士が接触する面積が大きく、当該粘着シートを巻き芯に巻き重ねた際に、当該粘着シートにかかる圧力が大きくなり、当該粘着シートの間に混入した異物による打痕を十分に防止することができない。 Moreover, in this invention, in the area | region inside the said slip sheet, the length ratio which the said adhesive sheet which pinches | interposes the said slip sheet with respect to the full length of the width direction of the said adhesive layer contacts 0.01-0. Preferably, it is within the range of 6, and more preferably within the range of 0.2 to 0.5. When the length ratio is less than 0.01, the area where the adjacent adhesive sheets are in contact with each other is small, the frictional force between the adhesive sheets becomes insufficient, and when the adhesive sheet is wound around the winding core, it is caused by skidding. There is a risk of miswinding. In addition, when the length ratio is more than 0.6, the area where the adjacent adhesive sheets are in contact with each other is large, and when the adhesive sheet is wound around a core, the pressure applied to the adhesive sheet increases, It is not possible to sufficiently prevent dents due to foreign matters mixed between the adhesive sheets.

以下、本発明の粘着シートロールについて、離型シートから順に説明する。
(離型シート)
本発明で用いる離型シートは、基材シートの一方の面に、離型剤層が積層されている。当該離型シートの基材シートは、通常粘着剤層の支持体として使用できるものであればいずれでもよく、例えば、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、ポリエチレンナフタレート、テレフタル酸−イソフタル酸−エチレングリコール共重合体、テレフタル酸−シクロヘキサンジメタノール−エチレングリコール共重合体などのポリエステル系樹脂、ナイロン6などのポリアミド系樹脂、ポリプロピレン、ポリメチルペンテン、シクロオレフィン重合体などのポリオレフィン系樹脂、上質紙、パーチメント紙、硫酸紙等の紙等が挙げられる。
なお、これらの樹脂は、単独、又は複数種類の混合樹脂(ポリマーアロイを含む)として用いられ、基材シートの層構成は、以上の材料層の単層、又は2層以上の積層体として用いられる。
Hereinafter, the pressure-sensitive adhesive sheet roll of the present invention will be described in order from the release sheet.
(Release sheet)
The release sheet used in the present invention has a release agent layer laminated on one surface of a base sheet. The base sheet of the release sheet may be any material as long as it can be used as a support for the pressure-sensitive adhesive layer. For example, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, terephthalic acid-isophthalic acid-ethylene glycol copolymer Polymers, polyester resins such as terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer, polyamide resins such as nylon 6, polyolefin resins such as polypropylene, polymethylpentene, and cycloolefin polymers, fine paper, parchment paper And paper such as sulfuric acid paper.
These resins are used alone or as a plurality of types of mixed resins (including polymer alloys), and the layer structure of the base sheet is used as a single layer of the above material layers or a laminate of two or more layers. It is done.

基材シートの厚みは特に限定されないが、10μm〜100μmが好ましい。また基材シートと離型剤層との接着性を向上させるため、必要に応じて基材表面にコロナ放電処理、プラズマ処理、プライマーコート、脱脂処理、表面粗面化処理等の易接着性処理を行うこともできる。   Although the thickness of a base material sheet is not specifically limited, 10 micrometers-100 micrometers are preferable. In addition, in order to improve the adhesion between the base sheet and the release agent layer, easy adhesion treatment such as corona discharge treatment, plasma treatment, primer coating, degreasing treatment, surface roughening treatment, etc. is performed on the substrate surface as necessary. Can also be done.

離型シートの離型剤層は粘着剤層に対して離型性(剥離性)の材料により形成することができる。例えば、フッ素系樹脂、パラフィンワックス、モンタンワックス、合成ワックス等のワックス類や、ポリシロキサン、シリコーン等の珪素系樹脂、メラミン系樹脂、ポリオレフィン系樹脂、多官能アクリレート、エポキシ樹脂等の離型剤を単体で、或はこれをアクリル樹脂、セルロース系樹脂又はビニル系樹脂等の樹脂バインダー中に添加して塗工液を調製し、その塗工液を離型シート用基材に塗布して乾燥し、或は架橋乃至重合させて離型剤層を形成することにより行うことができる。また、上記の樹脂をエクストルージョンコート等により離型シート用基材にラミネートして離型剤層を形成することにより行うこともできる。   The release agent layer of the release sheet can be formed of a material having releasability (peelability) with respect to the pressure-sensitive adhesive layer. For example, release agents such as waxes such as fluorine resin, paraffin wax, montan wax, synthetic wax, silicon resins such as polysiloxane and silicone, melamine resins, polyolefin resins, polyfunctional acrylates, epoxy resins, etc. Prepare a coating solution by itself or in a resin binder such as acrylic resin, cellulose resin, or vinyl resin, and apply the coating solution to a release sheet substrate and dry it. Alternatively, it can be carried out by crosslinking or polymerizing to form a release agent layer. Moreover, it can also carry out by laminating | stacking said resin to the base material for release sheets by an extrusion coat etc., and forming a release agent layer.

(粘着剤層)
本発明で用いる粘着剤層は、透明基材と光学フィルタ或いは電磁波遮蔽フィルタ等とを貼り合わせる際に粘着性を有し、更に、貼り合せ可能な接着性を有する。更に必要に応じて、剥離後に当該透明基材の再利用を可能とする(リワーク性ともいう)再剥離性を有するものを選択しても良い。
(Adhesive layer)
The pressure-sensitive adhesive layer used in the present invention has adhesiveness when the transparent substrate and the optical filter or the electromagnetic wave shielding filter are bonded together, and further has adhesive properties that can be bonded. Further, if necessary, a material having removability (also referred to as reworkability) that enables reuse of the transparent substrate after peeling may be selected.

(1)粘着剤
粘着剤とは、接着剤の1種をいい、接着の際に室温下(例えば、15〜40℃)で、単に適度な、通常、軽く手で押圧する程度の加圧のみにより、表面の粘着性のみで接着可能なものをいう。
本発明において用いられる粘着剤は、成膜性と透明性と粘着性を実現するものであれば特に限定されるものではなく、従来公知の各種粘着剤を適宜選択して用いることができる。粘着剤層としての透明性は、高いほどよいが、好ましくは可視光域380〜780nmにおける波長平均光線透過率が70%以上、より好ましくは80%以上となる光透過性が良い。
(1) Pressure-sensitive adhesive Pressure-sensitive adhesive refers to one type of adhesive, and is only moderately pressured, usually lightly pressed by hand at room temperature (for example, 15 to 40 ° C.) during bonding. According to the above, it can be adhered only by the tackiness of the surface.
The pressure-sensitive adhesive used in the present invention is not particularly limited as long as it achieves film forming properties, transparency, and pressure-sensitive adhesive properties, and various conventionally known pressure-sensitive adhesives can be appropriately selected and used. The higher the transparency as the pressure-sensitive adhesive layer, the better. However, the light transmittance is preferably such that the wavelength average light transmittance in the visible light region of 380 to 780 nm is 70% or more, more preferably 80% or more.

粘着剤の構成材料としては、例えば、天然ゴム系、合成ゴム系、アクリル樹脂系(以後、アクリル系とも略称)、シリコーン樹脂系、ポリエステル樹脂系等が挙げられる。合成ゴム系の具体例としては、スチレン−ブタジエンゴム、アクリロニトリル−ブタジエンゴム、ポリイソブチレンゴムが挙げられる。これらの粘着剤は、1種単独で又は2種以上を組み合わせて用いることができる。   Examples of the constituent material of the pressure-sensitive adhesive include natural rubber, synthetic rubber, acrylic resin (hereinafter also abbreviated as acrylic), silicone resin, and polyester resin. Specific examples of synthetic rubbers include styrene-butadiene rubber, acrylonitrile-butadiene rubber, and polyisobutylene rubber. These pressure-sensitive adhesives can be used alone or in combination of two or more.

好適に用いられる粘着剤としては、アクリル系粘着剤が挙げられる。アクリル系粘着剤は、少なくとも(メタ)アクリル酸アルキルエステルモノマーを含んで重合させたものである。炭素原子数1〜18程度のアルキル基を有する(メタ)アクリル酸アルキルエステルモノマーとカルボキシル基を有するモノマーとの共重合体や、炭素原子数1〜18程度のアルキル基を有する(メタ)アクリル酸アルキルエステルモノマーの2種以上を用いた共重合体であるのが一般的である。なお、本発明において(メタ)アクリル酸とは、アクリル酸及び/又はメタクリル酸をいう。   An acrylic adhesive is mentioned as an adhesive suitably used. The acrylic pressure-sensitive adhesive is a polymer containing at least a (meth) acrylic acid alkyl ester monomer. A copolymer of a (meth) acrylic acid alkyl ester monomer having an alkyl group having about 1 to 18 carbon atoms and a monomer having a carboxyl group, or (meth) acrylic acid having an alkyl group having about 1 to 18 carbon atoms A copolymer using two or more kinds of alkyl ester monomers is generally used. In the present invention, (meth) acrylic acid means acrylic acid and / or methacrylic acid.

ここで使用される(メタ)アクリル酸アルキルエステルモノマーの例としては、(メタ)アクリル酸メチル、(メタ)アクリル酸エチル、(メタ)アクリル酸n-プロピル、(メタ)アクリル酸n-ブチル等を挙げることができる。   Examples of (meth) acrylic acid alkyl ester monomers used here include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, etc. Can be mentioned.

(2)その他の成分
本発明における粘着剤層には、所望に応じて、イソシアネート化合物等の架橋剤、粘着付与剤等が含まれていても良い。その他、粘着剤層には、各種界面活性剤、シランカップリング剤等が含まれていても良い。
(2) Other components The pressure-sensitive adhesive layer in the present invention may contain a crosslinking agent such as an isocyanate compound, a tackifier, and the like as desired. In addition, the surface-sensitive adhesive layer may contain various surfactants, silane coupling agents, and the like.

(合紙)
本発明で用いる合紙は、粘着シートが密着するのを防止する機能を有し、当該合紙を粘着シート上に設けることにより、当該粘着シートを巻き重ねた時に、当該粘着シート同士にかかる圧力(主に粘着シートロールの直径方向(法線方向)に向かって作用する)を、当該合紙部分以外の領域に於いて、小さくすることができる。尚、当該合紙部分に接する領域に於いては、逆に当該粘着シート同士に加わる圧力は増加し、粘着剤層に当該合紙の打痕が刻印されることにはなる。但し、斯かる部分は粘着シートロールの幅方向両端部であり、通常、此処は切除して捨てられる部分になる為、特に不都合は無い。
上記合紙の材質に関しては特に限定はないが、粘着シートをロール状態で放置した時に、粘着シートの離型シートと粘着又は接着を生じないことが必要である。例えば、ポリエチレンテレフタレート等のポリエステル系樹脂、ナイロン等のポリアミド系樹脂、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、ポリ塩化ビニル、ポリスチレン、等の硬質の熱可塑性樹脂、上質の和紙、不織布、ウレタン発泡シート、ポリエチレン発泡体シート等の弾力性に優れた材料が挙げられる。弾力性に優れた材料を合紙として使用すると、合紙の端部において筋状の打痕が生じ難いため、粘着シートの有効領域を広くすることができるので、好ましい。
(Interleaf)
The interleaf used in the present invention has a function of preventing the adhesive sheets from sticking to each other. By providing the interleaf on the adhesive sheet, the pressure applied to the adhesive sheets when the adhesive sheets are rolled up. (Mainly acting in the diameter direction (normal direction) of the pressure-sensitive adhesive sheet roll) can be reduced in the region other than the slip-sheet portion. In the region in contact with the slip sheet portion, the pressure applied between the pressure sensitive adhesive sheets increases, and the slip marks of the slip sheet are imprinted on the pressure sensitive adhesive layer. However, such portions are both end portions in the width direction of the pressure-sensitive adhesive sheet roll, and usually this is a portion that is cut out and discarded, so there is no particular inconvenience.
The material of the slip sheet is not particularly limited. However, when the pressure-sensitive adhesive sheet is left in a roll state, it is necessary that the pressure-sensitive adhesive sheet does not stick or adhere to the release sheet. For example, polyester resins such as polyethylene terephthalate, polyamide resins such as nylon, polyolefin resins such as polyethylene and polypropylene, rigid thermoplastic resins such as polyvinyl chloride and polystyrene, high quality Japanese paper, nonwoven fabric, urethane foam sheet, Examples thereof include materials having excellent elasticity such as polyethylene foam sheets. It is preferable to use a material having excellent elasticity as interleaving paper because a streak-like dent is hardly generated at the end of the interleaving paper, so that the effective area of the adhesive sheet can be widened.

合紙の厚みは、5μm〜12μmの範囲内であることが好ましく、更に6μm〜10μmの範囲内であることが好ましい。当該合紙の厚みが5μm未満の場合、打痕発生を抑制する効果が十分に得られず、12μm超過の場合、横滑りによる巻きずれ防止効果が十分に得られない。   The thickness of the slip sheet is preferably in the range of 5 μm to 12 μm, and more preferably in the range of 6 μm to 10 μm. When the thickness of the slip sheet is less than 5 μm, the effect of suppressing the occurrence of dents is not sufficiently obtained, and when it exceeds 12 μm, the effect of preventing the winding slippage due to skidding cannot be sufficiently obtained.

合紙の幅は、粘着シートの全幅が500〜1500mmの場合、5mm〜100mmの範囲内であることが好ましく、更に10mm〜60mmの範囲内であることが好ましい。合紙の幅が5mm未満の場合、粘着シートにかかる圧力を十分に低減することができないため、粘着剤層に打痕が生じやすくなる。また、合紙の幅が100mm超過の場合、製品である粘着シートを、ロール状態から巻き戻して引き伸ばした時に、合紙の跡がつき、外観不良となるシート面積が大きくなるために有効製品面積が小さくなり、好ましくない。   When the total width of the pressure-sensitive adhesive sheet is 500 to 1500 mm, the width of the interleaf is preferably within a range of 5 mm to 100 mm, and more preferably within a range of 10 mm to 60 mm. When the width of the interleaving paper is less than 5 mm, the pressure applied to the pressure-sensitive adhesive sheet cannot be sufficiently reduced, so that a dent is easily generated in the pressure-sensitive adhesive layer. In addition, when the width of the slip sheet exceeds 100 mm, when the adhesive sheet that is the product is unwound from the roll state and stretched, the slip sheet marks are left, and the effective product area increases because the sheet area that causes poor appearance is increased. Becomes small and is not preferable.

(粘着シートロールの製造方法)
本発明の粘着シートロールは、1層の離型シートに粘着剤層を形成する工程と、形成した粘着剤層に更に別の1層の離型シートを積層するラミネート工程を含む製造方法により製造することができる。粘着剤層を形成する工程は、塗工液を塗布する塗工工程と、塗布した塗膜を乾燥させる乾燥工程とを有する。具体的には、支持体となる一方の離型シートが巻き取られている供給ロールから繰り出された離型シートに、塗工部で粘着剤塗工液が塗布される。ここで、粘着剤塗工液は、良好な塗膜を形成すべく、予め粘着剤を希釈溶剤により希釈して所望粘度に調製する。次いで、乾燥工程後に、他方の離型シートを粘着剤層に積層させ、更に、当該離型シートの両端部近傍に図1の如く合紙を挿入して巻き取りロールに巻き取ることにより粘着シートロールを製造する。
(Method for producing adhesive sheet roll)
The pressure-sensitive adhesive sheet roll of the present invention is produced by a production method including a step of forming a pressure-sensitive adhesive layer on one layer of release sheet and a lamination step of laminating another layer of release sheet on the formed pressure-sensitive adhesive layer. can do. The step of forming the pressure-sensitive adhesive layer has a coating step of applying a coating liquid and a drying step of drying the applied coating film. Specifically, the pressure-sensitive adhesive coating liquid is applied to the release sheet fed from the supply roll on which one release sheet serving as the support is wound up at the coating unit. Here, the pressure-sensitive adhesive coating solution is prepared to have a desired viscosity by previously diluting the pressure-sensitive adhesive with a diluent solvent in order to form a good coating film. Next, after the drying step, the other release sheet is laminated on the pressure-sensitive adhesive layer, and a slip sheet is inserted in the vicinity of both ends of the release sheet as shown in FIG. Manufacture rolls.

(用途)
本発明の粘着シートロールの代表的な用途としては、PDP等の各種画像表示装置(ディスプレイ)用複合フィルタの積層粘着剤層として、電磁波遮蔽フィルタ、光学フィルタ、及び其の他機能層から選ばれる2層以上の機能層層間に形成される。電磁波遮蔽フィルタとしては、金属メッシュ、透明導電体薄膜等を用いた公知の各種仕様のものが挙げられる。光学フィルタとしては、近赤外線吸収フィルタ、反射防止フィルタ、防眩フィルタ、着色フィルタ、紫外線吸収フィルタ等公知のフィルタが挙げられる。又、其の他機能層としては、帯電防止層、耐擦傷性ハードコート層、防汚層、耐衝撃層等が挙げられる。例えば、防眩フィルムや反射防止フィルムの最表面にくるフィルムの貼り付け面(裏面)として用いることができる。また、電磁波遮蔽フィルタとPDP又は透明基材とを貼り付けるために用いることができる。
或いは、ディスプレイ用複合フィルタの積層粘着剤層以外の用途に本発明の粘着シートロールを適用することも可能である。例えば、建築物、車両、船舶、航空機の窓硝子に遮光フィルム、飛散防止フィルム、広告宣伝用フィルム等を貼着する為の積層粘着剤層用途、写真、絵画、印刷物等の表面に透明保護シートを貼着する粘着剤層等が挙げられる。
(Use)
A typical application of the pressure-sensitive adhesive sheet roll of the present invention is selected from an electromagnetic wave shielding filter, an optical filter, and other functional layers as a laminated pressure-sensitive adhesive layer of a composite filter for various image display devices (displays) such as PDP. It is formed between two or more functional layer layers. Examples of the electromagnetic wave shielding filter include those of various known specifications using a metal mesh, a transparent conductor thin film, and the like. Examples of the optical filter include known filters such as a near infrared absorption filter, an antireflection filter, an antiglare filter, a coloring filter, and an ultraviolet absorption filter. Examples of other functional layers include an antistatic layer, a scratch-resistant hard coat layer, an antifouling layer, and an impact resistant layer. For example, it can be used as the affixing surface (back surface) of the film that comes to the outermost surface of the antiglare film or antireflection film. Moreover, it can be used for attaching an electromagnetic wave shielding filter and a PDP or a transparent substrate.
Or it is also possible to apply the adhesive sheet roll of this invention for uses other than the laminated adhesive layer of the composite filter for a display. For example, laminated adhesive layer for sticking light-shielding film, anti-scattering film, advertising film, etc. to window glass of buildings, vehicles, ships, aircraft, transparent protective sheet on the surface of photographs, paintings, printed materials, etc. A pressure-sensitive adhesive layer or the like for adhering to the surface.

なお、本発明は、上記実施形態に限定されるものではない。上記実施形態は例示であり、本発明の特許請求の範囲に記載された技術的思想と実質的に同一な構成を有し、同様な作用効果を奏するものは、いかなるものであっても本発明の技術的範囲に包含される。   The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and that exhibits the same effects. Are included in the technical scope.

以下、実施例を挙げて、本発明を更に具体的に説明する。これらの記載により本発明を制限するものではない。尚、実施例中、部は特に特定しない限り重量部を表す。   Hereinafter, the present invention will be described more specifically with reference to examples. These descriptions do not limit the present invention. In the examples, parts represent parts by weight unless otherwise specified.

(実施例1)
厚さ38μm、幅1330mmの離型フィルム(第一基材)(SP−PET−03−BU:商品名、東セロ(株)製)を用意し、当該離型フィルムの離型剤層面上に、平均膜厚25μm、幅1300mmのアクリル系粘着剤層を形成した。次いで、厚さ38μm、幅1330mmの離型フィルム(第二基材)(セラピール MFA:商品名、東レフィルム加工(株)製)を用意し、当該離型フィルムの離型剤層面と、上記第一基材上の粘着剤層面とを向き合わせて貼り合せることにより粘着シートを得た。
上記粘着剤層は、膜厚の最も厚い部分(Sa)を、上記粘着シートの一方の端部から340mm以上960mm以下の範囲内に、膜厚の最も薄い部分(Sb)を、上記粘着シートの一方の端部から340mm未満の範囲内と、同端部から960mm超過1330mm未満の範囲内に形成し、且つ、当該膜厚の最も厚い部分(Sa)と当該膜厚の最も薄い部分(Sb)との差(S)が2.6μmとなるように形成した。
得られた粘着シートの両端部に幅10mm、厚さ6μmのポリエステルフィルム(ルミラー:商品名、東レ(株)製を上記幅に裁断したもの)を合紙として挿入しながら、千代田興業(株)製の巻芯に1000m巻き取り、粘着シートロールとした。
尚、上記粘着剤層の膜厚の最も厚い部分(Sa)と最も薄い部分(Sb)との差(S)と、上記合紙の厚み(T)との比(S/T)は、0.43であり、上記合紙より内側の領域において、上記粘着剤層の幅方向の全長に対する当該合紙を挟む上記粘着シート同士が接触する長さ比は、0.47であった。
Example 1
A release film (first substrate) having a thickness of 38 μm and a width of 1330 mm (SP-PET-03-BU: trade name, manufactured by Tosero Co., Ltd.) is prepared, and on the release agent layer surface of the release film, An acrylic pressure-sensitive adhesive layer having an average film thickness of 25 μm and a width of 1300 mm was formed. Next, a release film (second base material) having a thickness of 38 μm and a width of 1330 mm (therapeutic MFA: trade name, manufactured by Toray Film Processing Co., Ltd.) is prepared, and the release agent layer surface of the release film and the first The pressure-sensitive adhesive sheet was obtained by facing and bonding the pressure-sensitive adhesive layer surface on one substrate.
The pressure-sensitive adhesive layer has the thickest part (Sa) within the range of 340 mm to 960 mm from one end of the pressure-sensitive adhesive sheet, and the thinnest part (Sb) of the pressure-sensitive adhesive sheet. Formed within a range of less than 340 mm from one end and within a range of more than 960 mm and less than 1330 mm from the same end, and the thickest part (Sa) and the thinnest part (Sb) And the difference (S) was 2.6 μm.
While inserting a polyester film having a width of 10 mm and a thickness of 6 μm into both ends of the obtained pressure-sensitive adhesive sheet (Lumirror: trade name, manufactured by Toray Industries, Inc., cut into the above width) as a slip sheet, Chiyoda Kogyo Co., Ltd. The wound core was wound up by 1000 m to form an adhesive sheet roll.
The ratio (S / T) between the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer and the thickness (T) of the slip sheet is 0. In the region inside the slip sheet, the length ratio of the pressure-sensitive adhesive sheets contacting the slip sheet to the total length in the width direction of the pressure-sensitive adhesive layer was 0.47.

得られた粘着シートロールの巻き形状は良好であり、横ずれによる両端部の変形などは発生しなかった。
また、上記粘着シートロールを3日間経過した後に、巻き戻して、蛍光灯下で目視検査を行い、当該ロール中の無作為に選択した長さ50m分につき、目視で判別可能な打痕によると判断される欠点の数を計数し、検査した粘着シートの面積(幅×長さ)で割り算して当該欠点の面密度で評価したところ、打痕発生率は0.01個/mであった。
The wound shape of the obtained pressure-sensitive adhesive sheet roll was good, and deformation of both end portions due to lateral displacement did not occur.
In addition, after the adhesive sheet roll has been unwound for 3 days, it is rewound and visually inspected under a fluorescent lamp, and according to a dent that can be visually discriminated for a randomly selected length of 50 m in the roll. When the number of defects to be judged was counted and divided by the area (width × length) of the inspected adhesive sheet and evaluated by the surface density of the defects, the dent occurrence rate was 0.01 / m 2. It was.

(実施例2)
前記実施例1において、上記粘着剤層の膜厚の最も厚い部分(Sa)と膜厚の最も薄い部分(Sb)との差(S)が0.6μmとなるように粘着剤層を形成した以外は、前記実施例1と同様にして粘着シートロールを得た。
尚、上記粘着剤層の膜厚の最も厚い部分(Sa)と最も薄い部分(Sb)との差(S)と、上記合紙の厚み(T)との比(S/T)は、0.1であり、上記合紙より内側の領域において、上記粘着剤層の幅方向の全長に対する当該合紙を挟む上記粘着シート同士が接触する長さ比は、0.47であった。
(Example 2)
In Example 1, the pressure-sensitive adhesive layer was formed so that the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer was 0.6 μm. Except for the above, an adhesive sheet roll was obtained in the same manner as in Example 1.
The ratio (S / T) between the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer and the thickness (T) of the slip sheet is 0. In the region inside the slip sheet, the length ratio at which the pressure-sensitive adhesive sheets sandwiching the slip sheet with respect to the overall length in the width direction of the pressure-sensitive adhesive layer was 0.47.

得られた粘着シートロールの巻き形状は良好であり、横ずれによる両端部の変形などは発生しなかった。
また、上記粘着シートロールを3日間経過した後に、巻き戻して、蛍光灯下で目視検査を行ったところ、打痕発生率は0.007個/mであった。
The wound shape of the obtained pressure-sensitive adhesive sheet roll was good, and deformation of both end portions due to lateral displacement did not occur.
Further, after a lapse of the adhesive sheet roll 3 days, rewind, was subjected to visual inspection under a fluorescent lamp, the dents incidence was 0.007 units / m 2.

(実施例3)
前記実施例1において、上記粘着剤層の膜厚の最も厚い部分(Sa)と膜厚の最も薄い部分(Sb)との差(S)が4.1μmとなるように粘着剤層を形成した以外は、前記実施例1と同様にして粘着シートを得た。
得られた粘着シートの両端部に幅10mm、厚さ9μmのポリエステルフィルム(ルミラー:商品名、東レ(株)製を上記幅に裁断したもの)を合紙として挿入しながら、千代田興業(株)製の巻芯に1000m巻き取り、粘着シートロールとした。
尚、上記粘着剤層の膜厚の最も厚い部分(Sa)と最も薄い部分(Sb)との差(S)と、上記合紙の厚み(T)との比(S/T)は、0.46であり、上記合紙より内側の領域において、上記粘着剤層の幅方向の全長に対する当該合紙を挟む上記粘着シート同士が接触する長さ比は、0.47であった。
(Example 3)
In Example 1, the pressure-sensitive adhesive layer was formed so that the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer was 4.1 μm. Except for the above, an adhesive sheet was obtained in the same manner as in Example 1.
Chiyoda Kogyo Co., Ltd. was inserted into both ends of the obtained adhesive sheet while inserting a polyester film having a width of 10 mm and a thickness of 9 μm as a slip sheet (Lumirror: trade name, manufactured by Toray Industries, Inc.). The wound core was wound up by 1000 m to form an adhesive sheet roll.
The ratio (S / T) between the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer and the thickness (T) of the slip sheet is 0. In the region on the inner side of the slip sheet, the length ratio at which the pressure-sensitive adhesive sheets sandwiching the slip sheet with respect to the total length in the width direction of the pressure-sensitive adhesive layer was 0.47.

得られた粘着シートロールの巻き形状は良好であり、横ずれによる両端部の変形などは発生しなかった。
また、上記粘着シートロールを3日間経過した後に、巻き戻して、蛍光灯下で目視検査を行ったところ、打痕発生率は0.012個/mであった。
The wound shape of the obtained pressure-sensitive adhesive sheet roll was good, and deformation of both end portions due to lateral displacement did not occur.
Further, after a lapse of the adhesive sheet roll 3 days, rewind, was subjected to visual inspection under a fluorescent lamp, the dents incidence was 0.012 units / m 2.

(実施例4)
前記実施例3において、上記粘着剤層の膜厚の最も厚い部分(Sa)と膜厚の最も薄い部分(Sb)との差(S)が0.9μmとなるように粘着剤層を形成した以外は、前記実施例3と同様にして粘着シートロールを得た。
尚、上記粘着剤層の膜厚の最も厚い部分(Sa)と最も薄い部分(Sb)との差(S)と、上記合紙の厚み(T)との比(S/T)は、0.1であり、上記合紙より内側の領域において、上記粘着剤層の幅方向の全長に対する当該合紙を挟む上記粘着シート同士が接触する長さ比は、0.47であった。
Example 4
In Example 3, the pressure-sensitive adhesive layer was formed so that the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer was 0.9 μm. Except for the above, an adhesive sheet roll was obtained in the same manner as in Example 3.
The ratio (S / T) between the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer and the thickness (T) of the slip sheet is 0. In the region inside the slip sheet, the length ratio at which the pressure-sensitive adhesive sheets sandwiching the slip sheet with respect to the overall length in the width direction of the pressure-sensitive adhesive layer was 0.47.

得られた粘着シートロールの巻き形状は良好であり、横ずれによる両端部の変形などは発生しなかった。
また、上記粘着シートロールを3日間経過した後に、巻き戻して、蛍光灯下で目視検査を行ったところ、打痕発生率は0.009個/mであった。
The wound shape of the obtained pressure-sensitive adhesive sheet roll was good, and deformation of both end portions due to lateral displacement did not occur.
Further, after a lapse of the adhesive sheet roll 3 days, rewind, was subjected to visual inspection under a fluorescent lamp, the dents incidence was 0.009 units / m 2.

(比較例1)
前記実施例1において、上記粘着剤層の膜厚の最も厚い部分(Sa)と膜厚の最も薄い部分(Sb)との差(S)が3.2μmとなるように粘着剤層を形成した以外は、前記実施例1と同様にして粘着シートロールを得た。
尚、上記粘着剤層の膜厚の最も厚い部分(Sa)と最も薄い部分(Sb)との差(S)と、上記合紙の厚み(T)との比(S/T)は、0.53であり、上記合紙より内側の領域において、上記粘着剤層の幅方向の全長に対する当該合紙を挟む上記粘着シート同士が接触する長さ比は、0.47であった。
(Comparative Example 1)
In Example 1, the pressure-sensitive adhesive layer was formed so that the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer was 3.2 μm. Except for the above, an adhesive sheet roll was obtained in the same manner as in Example 1.
The ratio (S / T) between the difference (S) between the thickest part (Sa) and the thinnest part (Sb) of the pressure-sensitive adhesive layer and the thickness (T) of the slip sheet is 0. .53, and the length ratio of the pressure-sensitive adhesive sheets in contact with each other with respect to the total length in the width direction of the pressure-sensitive adhesive layer in the region on the inner side of the pressure-sensitive adhesive layer was 0.47.

得られた粘着シートロールの巻き形状は良好であり、横ずれによる両端部の変形などは発生しなかった。
また、上記粘着シートロールを3日間経過した後に、巻き戻して、蛍光灯下で目視検査を行ったところ、打痕発生率は0.341個/mであった。
The wound shape of the obtained pressure-sensitive adhesive sheet roll was good, and deformation of both end portions due to lateral displacement did not occur.
Further, after a lapse of the adhesive sheet roll 3 days, rewind, was subjected to visual inspection under a fluorescent lamp, the dents incidence was 0.341 units / m 2.

(比較例2)
厚さ38μm、幅1330mmの離型フィルム(第一基材)(上記第一基材と同じ物)を用意し、当該離型フィルムの離型剤層面上に、平均膜厚25μm、幅1300mmのアクリル系粘着剤層を形成した。次いで、厚さ38μm、幅1330mmの離型フィルム(第二基材)(上記第二基材と同じ物)を用意し、当該離型フィルムの離型剤層面と、上記第一基材の粘着剤層面とを向き合わせて貼り合せることにより粘着シートを得た。
得られた粘着シートを、千代田興業(株)製の巻芯に1000m巻き取り、粘着シートロールとした。
(Comparative Example 2)
A release film (first substrate) having a thickness of 38 μm and a width of 1330 mm (same as the first substrate) is prepared, and an average film thickness of 25 μm and a width of 1300 mm is formed on the release agent layer surface of the release film. An acrylic pressure-sensitive adhesive layer was formed. Next, a release film (second base material) having a thickness of 38 μm and a width of 1330 mm (the same as the second base material) is prepared, and the release agent layer surface of the release film and the adhesion of the first base material are prepared. The pressure-sensitive adhesive sheet was obtained by facing and pasting the agent layer surface.
The obtained pressure-sensitive adhesive sheet was wound up by 1000 m on a core made by Chiyoda Kogyo Co., Ltd. to obtain a pressure-sensitive adhesive sheet roll.

得られた粘着シートロールは、幅方向の厚みの差にかかわらず、巻き形状が良好であり、横ずれによる両端部の変形などは発生しなかった。
また、上記粘着シートロールを3日間経過した後に、巻き戻して、蛍光灯下で目視検査を行ったところ、打痕発生率は0.5個/m以上であった。
Regardless of the difference in thickness in the width direction, the obtained pressure-sensitive adhesive sheet roll had a good winding shape, and deformation at both ends due to lateral displacement did not occur.
Moreover, after the said adhesive sheet roll passed for 3 days, when it rewound and visual inspection was performed under the fluorescent lamp, the dent occurrence rate was 0.5 piece / m < 2 > or more.

本発明の粘着シートを長尺ロール状に巻き取った状態の概略図である。It is the schematic of the state which wound up the adhesive sheet of this invention in the shape of a long roll. 図1におけるA−A’断面の拡大図である。It is an enlarged view of the A-A 'cross section in FIG. 本発明の粘着剤層の膜厚分布の一例を示す模式的縦断面図である。It is a typical longitudinal section showing an example of film thickness distribution of an adhesive layer of the present invention.

符号の説明Explanation of symbols

1 粘着シートロール
10 粘着シート
11 合紙
12 巻き芯
13 粘着剤層
14 離型シート
15 隙間
DESCRIPTION OF SYMBOLS 1 Adhesive sheet roll 10 Adhesive sheet 11 Insert paper 12 Winding core 13 Adhesive layer 14 Release sheet 15 Crevice

Claims (3)

粘着剤層の両面に離型シートが積層された帯状の粘着シートと、当該粘着シートの両端部近傍に設けられた当該粘着シートよりも狭幅の合紙とが巻き芯に巻き重ねられた粘着シートロールにおいて、
前記合紙より内側に、前記粘着剤層の膜厚の最も厚い部分を少なくとも1つ以上有し、且つ、当該粘着剤層の膜厚の最も厚い部分と最も薄い部分との差(S)と、前記合紙の厚み(T)との比(S/T)が0.1〜0.5である粘着シートロール。
A pressure-sensitive adhesive in which a strip-shaped pressure-sensitive adhesive sheet having release sheets laminated on both sides of a pressure-sensitive adhesive layer and a paper sheet narrower than the pressure-sensitive adhesive sheet provided in the vicinity of both ends of the pressure-sensitive adhesive sheet are wound around a core. In the sheet roll,
The difference (S) between the thickest part and the thinnest part of the pressure-sensitive adhesive layer having at least one thickest part of the pressure-sensitive adhesive layer on the inner side of the slip sheet A pressure-sensitive adhesive sheet roll having a ratio (S / T) of 0.1 to 0.5 with respect to the thickness (T) of the slip sheet.
前記合紙より内側の領域において、前記粘着剤層の幅方向の全長に対する、当該合紙を挟む前記粘着シート同士が接触する長さ比が、0.01〜0.6の範囲内である、請求項1に記載の粘着シートロール。   In the region inside the slip sheet, the length ratio of the pressure-sensitive adhesive layers contacting the slip sheet to the total length in the width direction of the pressure-sensitive adhesive layer is within a range of 0.01 to 0.6. The pressure-sensitive adhesive sheet roll according to claim 1. 前記合紙の厚みが6μm〜12μmの範囲内である、請求項1又は2に記載の粘着シートロール。   The pressure sensitive adhesive sheet roll according to claim 1 or 2 whose thickness of said slip sheet is in the range of 6 micrometers-12 micrometers.
JP2008247292A 2008-09-26 2008-09-26 Pressure-sensitive adhesive sheet roll Pending JP2010077284A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012163834A (en) * 2011-02-08 2012-08-30 Dainippon Printing Co Ltd Sheet roll, manufacturing method of sheet role, manufacturing method of optical sheet, and manufacturing method of display device
JP2012247737A (en) * 2011-05-31 2012-12-13 Dainippon Printing Co Ltd Sheet roll, manufacturing method of sheet roll, manufacturing method of optical sheet, and manufacturing method of display device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812556U (en) * 1981-07-15 1983-01-26 東洋紡績株式会社 roll-shaped winding body
JP2004199643A (en) * 2002-10-22 2004-07-15 Nitto Denko Corp Conductive film roll and its manufacturing method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812556U (en) * 1981-07-15 1983-01-26 東洋紡績株式会社 roll-shaped winding body
JP2004199643A (en) * 2002-10-22 2004-07-15 Nitto Denko Corp Conductive film roll and its manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012163834A (en) * 2011-02-08 2012-08-30 Dainippon Printing Co Ltd Sheet roll, manufacturing method of sheet role, manufacturing method of optical sheet, and manufacturing method of display device
JP2012247737A (en) * 2011-05-31 2012-12-13 Dainippon Printing Co Ltd Sheet roll, manufacturing method of sheet roll, manufacturing method of optical sheet, and manufacturing method of display device

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