JP2007083674A - Block copy sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a block copy sheet which reduces getting-in of air between a plate cylinder and the block copy sheet and causing of a wrinkle or a distortion due to mounting of the block copy sheet on the occasion when the sheet is mounted on the plate cylinder, and thus enables improvement of the efficiency of block copy sheet mounting work. <P>SOLUTION: The block copy sheet has an adhesive layer on at least one surface of a sheet main body and has a plurality of recessed lines in a parallel state in the adhesive layer. These recessed lines are preferably in parallel to one side of the sheet main body. Besides, the block copy sheet has preferably an auxiliary line being parallel to one side of the sheet main body or intersecting it perpendicularly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は版下シートに関し、更に詳しくは、版胴に版下シートを装着する際、版下シート下への空気の入り込みやしわや歪みの誘発を抑止し、もって版下シート装着作業の能率向上を図ることができる版下シートに関するものである。   More specifically, the present invention relates to an underlay sheet, and more particularly, when the underplate sheet is mounted on the plate cylinder, air intrusion under the underplate sheet and induction of wrinkles and distortions are suppressed, thereby reducing the efficiency of the underplate sheet mounting work. The present invention relates to a stencil sheet that can be improved.

平版印刷において印刷版を印刷機の版胴に装着するに際し、所謂咬え部によって印刷版の端部を固定する方式が採られている。この方式は、アルミニウム等の金属製支持体を用いた重印刷においては望ましいものであり、印刷中の印刷版のずれを防止できる。   In the planographic printing, when the printing plate is mounted on the plate cylinder of a printing press, a method is adopted in which the end portion of the printing plate is fixed by a so-called bite portion. This method is desirable in heavy printing using a metal support such as aluminum, and can prevent a printing plate from being displaced during printing.

しかしながら、紙やプラスチックフィルム等の金属以外の材料を支持体とする印刷版を用いる場合、支持体が柔らかいために版胴の先端への咬え位置が悪くなる傾向があり、そのような時には版胴の円周方向に沿った精度である縦位置精度が悪くなって、場合によっては斜めにずれて固定されることがある。更には、印刷中における版胴との摩擦等によって部分的に歪みが生じ、用紙に対する位置精度の低下を招くという問題があった。   However, when using a printing plate that uses a material other than metal such as paper or plastic film as a support, the support is so soft that the biting position to the tip of the plate cylinder tends to deteriorate. The vertical position accuracy, which is the accuracy along the circumferential direction of the cylinder, is deteriorated, and in some cases, it may be fixed while being shifted obliquely. Furthermore, there is a problem that distortion occurs partially due to friction with the plate cylinder during printing, and the positional accuracy with respect to the paper is reduced.

この問題により、金属以外の材料を支持体とする平版印刷版では、印刷物の見当精度が低くても問題を生じない少数枚の印刷に限って用いられ、多色で精巧な印刷や大型印刷機を用いた多数枚の印刷では、色ずれが起きることがある。   Due to this problem, lithographic printing plates using materials other than metals as a support are used only for a small number of prints that do not cause problems even if the registration accuracy of printed matter is low. Color misregistration may occur when printing a large number of sheets using.

そこで、この問題を解決するため、印刷版の裏面に磁性体層を設けておき、鉄製版胴に磁力によって付着させる試みがあるが、印刷による歪み等を抑止するほどの磁力を与えるためには磁性体層を相当厚くしなければならず、薄い印刷版としては不向きである。これとは逆に、版胴に磁力を持たせておき、鉄製支持体の印刷版を用いることも提案されているが、印刷版用支持体として鉄箔の適性とは別に、磁力に作用する鉄を支持体に用いなければならない点に制約を有する。   Therefore, in order to solve this problem, there is an attempt to provide a magnetic layer on the back side of the printing plate and attach it to the iron plate cylinder by magnetic force. The magnetic layer must be made considerably thick and is not suitable as a thin printing plate. On the contrary, it has been proposed to use a printing plate with an iron support while keeping the plate cylinder magnetic, but it acts on the magnetic force separately from the suitability of iron foil as a printing plate support. There are limitations in that iron must be used for the support.

また、印刷中の版ずれ防止と印刷終了時の脱着性を考慮して、印刷版の裏面に光剥離型粘着層を設けておき、印刷版装着時に版胴に接着させることにより、印刷による歪み等を抑止する方法も提案されている（例えば、特許文献１参照）。更に、印刷版裏面の粘着層の印刷版支持体と反対面に設けられた剥離フィルムを自動的に剥離すると共に版胴に付着装着させる版装着装置も提案されている（例えば、特許文献２参照）。これらにかかる印刷版は、裏面粘着層により版胴に固定されるので、印刷による歪み等は防止されるが、そもそも予め印刷版裏面に（光剥離型）粘着層と粘着保護層（剥離フィルム）を設けているので、強アルカリ現像処理のような画像形成方法には制約を有するし、印刷版装着時に印刷版が不用意に版胴等に接触すれば、咬わえ精度の悪化は避けられない。   In addition, in consideration of prevention of plate misalignment during printing and detachability at the end of printing, a photo-releasable adhesive layer is provided on the back side of the printing plate and adhered to the plate cylinder when the printing plate is mounted, thereby causing distortion due to printing. A method for suppressing the above has also been proposed (see, for example, Patent Document 1). Furthermore, a plate mounting apparatus has also been proposed in which a release film provided on the surface opposite to the printing plate support of the adhesive layer on the back side of the printing plate is automatically peeled and attached to the plate cylinder (see, for example, Patent Document 2). ). Since the printing plates according to these are fixed to the plate cylinder by the back surface adhesive layer, distortion due to printing is prevented, but in the first place, the back side of the printing plate (photo-release type) and the adhesive protective layer (release film) Therefore, if the printing plate is inadvertently brought into contact with the plate cylinder when the printing plate is mounted, deterioration of the biting accuracy can be avoided. Absent.

これらに対し、予め版胴に付着させて用いる版下シートがある（例えば、特許文献３〜５参照）。版下シートは、印刷版裏面との接触面側に滑り防止性を有し、版胴との接触面側に付着性を有するもので、予め版胴に装着させた上に画像形成した印刷版を版掛けすれば良いので、印刷版の画像形成には何ら制約を与えず、かつ印刷版の捻れや位置の修正が容易に行えるばかりか、印刷終了後の印刷版の脱着も容易である。   On the other hand, there is a stencil sheet that is used by adhering to a plate cylinder in advance (see, for example, Patent Documents 3 to 5). The under-plate sheet has anti-slip properties on the contact surface side with the printing plate back surface and has adhesiveness on the contact surface side with the plate cylinder. Therefore, the image formation of the printing plate is not restricted at all, and the twisting and position of the printing plate can be easily corrected, and the printing plate can be easily detached after the printing is completed.

しかしながら、版下シートは腰が弱く、厚さも０．１０〜０．３０ｍｍ程度なので、版胴への貼り付け作業に際してシートにしわが生じたり、版胴との間への空気の巻き込みや付着途中でずれが誘発すれば、その上に装着した印刷版への悪影響は避けられず、印圧の不均一化等による印刷品質の低下ばかりか、ブランケットやインキロールをも破損させる可能性があって好ましくない。
特開平１−２１０３４３号公報 特開平５−５０４号公報 特開２０００−３１８３３９号公報 特開２００１−１３８６６１号公報 特開２００３−１５９８８２号公報 However, since the lower sheet is weak and has a thickness of about 0.10 to 0.30 mm, the sheet is wrinkled during the pasting operation to the plate cylinder, or air is caught or adhered to the plate cylinder. If the misalignment is induced, the adverse effect on the printing plate mounted thereon is unavoidable, and not only the printing quality deteriorates due to non-uniform printing pressure, but also the blanket and ink roll may be damaged. Absent.
JP-A-1-210343 JP-A-5-504 JP 2000-318339 A JP 2001-138661 A JP 2003-159882 A

本発明の目的は、版胴に版下シートを装着する際、版胴と版下シートの間への空気の入り込みや版下シートの装着じわや歪みの誘発を抑止し、もって版下シート装着作業の能率向上を図ることができる版下シートを提供することにある。   It is an object of the present invention to suppress the intrusion of air between the plate cylinder and the under-sheet and the induction of wrinkles and distortion of the under-sheet when mounting the under-sheet on the plate cylinder. An object of the present invention is to provide a stencil sheet that can improve the efficiency of mounting work.

本発明者は上記に鑑み鋭意研究した結果、本発明の版下シートを発明するに至った。
すなわち、本発明は、シート本体の少なくとも一方面に粘着層を有する版下シートであって、該粘着層に複数の凹状線を平行様に有することを特徴とする版下シートである。この凹状線はシート本体の１辺と平行様に有することが好ましい。また、上記版下シートには、シート本体の１辺と平行または直行する補助線を有することが好ましい。 As a result of intensive studies in view of the above, the present inventor has invented the stencil sheet of the present invention.
That is, the present invention is an underversion sheet having an adhesive layer on at least one surface of a sheet body, wherein the adhesive layer has a plurality of concave lines in parallel. The concave line is preferably parallel to one side of the sheet body. Moreover, it is preferable that the said underlay sheet has an auxiliary line parallel or orthogonal to one side of the sheet body.

本発明の版下シートは、版胴への装着の際に、版胴と版下シートの間に空気が入り込んでも凹状線に沿って空気を逃がすことができ、もって版下シート下への空気の入り込みや版下シートの装着じわの誘発を抑止することができ、版下シート装着の不具合による印刷版への悪影響、更には印圧の不均一化等による印刷品質の低下やブランケットやインキロールの破損の可能性も払拭し得る秀逸な効果を有する。   When the plate is placed on the plate cylinder, the air can escape along the concave line even when air enters between the plate cylinder and the plate, so that the air below the plate Intrusion of wrinkles and wrinkling of under-sheets can be prevented, bad effects on the printing plate due to improper under-sheet mounting, and printing quality deterioration due to uneven printing pressure, blankets and ink It has an excellent effect that can also eliminate the possibility of roll breakage.

また、上記粘着層がシート本体の１辺に平行様に有しているか、シート本体の１辺と平行または直行する補助線を有していれば、、版胴における版下シート装着開始位置にこの凹状線または補助線の１本を合せて貼り付け始めれば、版下シートの装着が斜めになったりすることを抑止することができる。また、隣り合った２本の凹状線間ごとに貼り付けていけば、貼り付けによる寄りや歪みを最小限度に抑えることができるし、許容限度を超えてしわが生じても、しわ発生部に最も近い凹状線で切断し、しわ発生部の版下シートを除去した後、切断端から貼り付け始めることもできる。   In addition, if the adhesive layer is parallel to one side of the sheet main body or has an auxiliary line parallel to or perpendicular to one side of the sheet main body, the underlay sheet mounting start position in the plate cylinder If this concave line or one of the auxiliary lines is put together and started to be attached, it is possible to prevent the attachment of the underlay sheet from being inclined. In addition, if it is pasted between every two adjacent concave lines, the deviation and distortion caused by pasting can be minimized, and even if wrinkles occur beyond the allowable limit, After cutting at the nearest concave line and removing the underlay sheet of the wrinkle generating part, it can be started from the cut end.

以下に本発明の版下シートを詳しく説明する。本発明の版下シートは、シート本体の少なくとも一方面に粘着層を有する版下シートであって、この粘着層に複数の凹状線を平行様に有する。   The undercut sheet of the present invention will be described in detail below. The underversion sheet of the present invention is an underversion sheet having an adhesive layer on at least one surface of a sheet body, and has a plurality of concave lines in parallel in the adhesive layer.

本発明の版下シートのシート本体としては、ポリエチレンテレフタレート（ＰＥＴ）、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリカーボネート、ポリプロピレン、変性ポリプロピレン、ポリエチレン、アクリル系樹脂等のプラスチック、またはアルミニウム、ＳＵＳ等の金属、または紙、合成紙、不織布、布帛等及びこれらの素材の２層以上の積層体が挙げられるが、粘着層と合せた版下シート全体の厚さを０．１０〜０．３０ｍｍ程度に止めつつ、版下シートの持ち運びに際する折れや版下シートの版胴への装着時に寄りや歪みが誘発し難く、かつ装着後の版下シート表面（印刷版接触側）の版胴の曲率に沿った平滑性に本発明に係る凹状線がの悪影響を及ぼさないなどの各種取扱い性を担保する腰の強さを有するものが好ましく、そのようなものとしてＰＥＴ、ポリカーボネート、及びアクリル系樹脂等のプラスチック、またはアルミニウム、ＳＵＳ等の金属が挙げられる。シート本体の厚さは、版下シート全体の厚さにもよるが、厚い方が好ましく、薄くとも５０μｍ以上でかつ版下シート全体の厚さの１／３以上が好ましい。   As the sheet main body of the underlay sheet of the present invention, polyethylene terephthalate (PET), polyvinyl chloride, polyvinylidene chloride, polycarbonate, polypropylene, modified polypropylene, polyethylene, plastics such as acrylic resin, or metals such as aluminum and SUS, Or, paper, synthetic paper, non-woven fabric, fabric, and the like, and a laminate of two or more layers of these materials may be mentioned, while the total thickness of the underlay sheet combined with the adhesive layer is kept at about 0.10 to 0.30 mm. In addition, it is difficult to induce folds or distortion when carrying the underlay sheet or mounting the underside sheet on the plate cylinder, and it follows the curvature of the plate cylinder on the underside sheet surface (printing plate contact side) after installation. It is preferable to have waist strength that ensures various handling properties such as the concave line according to the present invention does not adversely affect the smoothness, PET as Unamono, polycarbonate, and plastics such as acrylic resin or aluminum, and a metal such as SUS. Although the thickness of the sheet main body depends on the thickness of the entire under-plate sheet, it is preferable that the thickness is large, and it is preferably 50 μm or more at least and 1/3 or more of the total thickness of the under-sheet.

また、本発明の版下シートに係る粘着層としては、エラストマーを主要成分とする粘着剤が好ましい。粘着剤の主要成分であるエラストマーは、常温でゴム状弾性を有し、凝集性を与える高分子材料である。具体的には、ポリイソブレン（天然及び合成）、スチレン・ブタジエンゴム（ＳＢＲ）、サーモプラスチックラバー（ＳＢＳ、ＳＩＳ）、ブチルゴム、ポリイソブチレン、クロロプレンゴム、シリコーンゴム、再生ゴム、種々のポリアクリル酸エステル、ポリビニルエーテル等のポリマーが好適に用いられる。   The pressure-sensitive adhesive layer according to the present invention is preferably a pressure-sensitive adhesive mainly composed of an elastomer. An elastomer as a main component of the pressure-sensitive adhesive is a polymer material having rubber-like elasticity at room temperature and imparting cohesiveness. Specifically, polyisobrene (natural and synthetic), styrene-butadiene rubber (SBR), thermoplastic rubber (SBS, SIS), butyl rubber, polyisobutylene, chloroprene rubber, silicone rubber, recycled rubber, various polyacrylates, Polymers such as polyvinyl ether are preferably used.

粘着剤として天然ゴムを用いる場合は、ロジン系樹脂や可塑剤等を添加し、通常ｎ−ヘキサンを溶媒として塗工する。また、スチレン・ブタジエンゴムを主原料とする場合は、溶融して塗工する。アクリル樹脂系においては、２−エチルヘキシルアクリレート、ブチルアクリレート、エチルアクリレート、アクリル酸、β−ヒドロキシエチルアクリレート等のアクリル系モノマーを重合して作る。重合の方法により、酢酸エチルやトルエン等の有機溶媒を用いたり、界面活性剤を用いて水中で乳化させながら重合したエマルジョンタイプを用いることができる。   When natural rubber is used as an adhesive, a rosin resin, a plasticizer, or the like is added, and coating is usually performed using n-hexane as a solvent. When styrene-butadiene rubber is used as the main raw material, it is melted and applied. In the acrylic resin system, it is made by polymerizing acrylic monomers such as 2-ethylhexyl acrylate, butyl acrylate, ethyl acrylate, acrylic acid, and β-hydroxyethyl acrylate. Depending on the polymerization method, an organic solvent such as ethyl acetate or toluene can be used, or an emulsion type polymerized while emulsifying in water using a surfactant can be used.

本発明の版下シートに係る粘着層の厚さは、版下シート全体の厚さを上記一定範囲に止めなければならない関係上、薄いとシート本体の厚さを厚くできる点では好ましいが、接着不良が誘発しやすくなるばかりか、何より粘着層に設ける凹状線の凹み深さが確保できず、凹状線に沿って空気を逃がしにくくなる。逆に、厚いと接着性や凹み深さの確保の点では好ましいが、シート本体の厚さを厚くできず、上記各種取扱い性を担保できなくなるので、３〜５０μｍ程度が好ましく、５〜４０μｍ程度がより好ましい。また、本発明の版下シートに係る粘着層の粘着強度は、ＪＩＳ Ｚ ０２３７による測定値を基準として２Ｎ／２５ｍｍ以上が好ましく、３〜２０Ｎ／２５ｍｍ程度がより好ましい。   The thickness of the pressure-sensitive adhesive layer related to the under-sheet of the present invention is preferable in that the thickness of the sheet body can be increased if it is thin, because the thickness of the entire under-sheet must be kept within the above-mentioned range. Not only is the defect easily induced, but above all, the depth of the concave line provided in the adhesive layer cannot be ensured, and it becomes difficult for air to escape along the concave line. On the contrary, if it is thick, it is preferable in terms of securing adhesiveness and the depth of the dent, but the thickness of the sheet body cannot be increased, and the above various handling properties cannot be secured, so about 3 to 50 μm is preferable, about 5 to 40 μm. Is more preferable. In addition, the adhesive strength of the adhesive layer according to the stencil sheet of the present invention is preferably 2 N / 25 mm or more, more preferably about 3 to 20 N / 25 mm, based on the measurement value according to JIS Z 0237.

本発明の版下シートには、その粘着層に複数の凹状線を平行様、好ましくはシート本体の１辺に平行様に有する。本発明でいう凹状線は、粘着層における線状に凹んだ部分を指し、その凹状形状はＵ字状、Ｖ字状、矩形状、サインカーブ状等、あるいはこれらを組合せた任意の形状で良い。また、本発明に係る凹状線は必ずしも直線性を問わず、三角波状、矩形波状、サインカーブ状等、あるいはこれらを組合せた任意の形状で良い。すなわち、本発明でいう「平行様」とは、凹状線が轍のごとく配置されたもので、隣接する２本の凹状線との間隔が一定であれば、凹状線が直線状でなくても本発明でいう平行様とみなす。   The underlay sheet of the present invention has a plurality of concave lines parallel to the adhesive layer, preferably parallel to one side of the sheet body. The concave line referred to in the present invention refers to a linearly recessed portion in the adhesive layer, and the concave shape may be a U-shape, V-shape, rectangular shape, sine curve shape, or any combination thereof. . In addition, the concave line according to the present invention does not necessarily have linearity, and may be a triangular wave shape, a rectangular wave shape, a sine curve shape, or any combination thereof. That is, the term “parallel” as used in the present invention means that concave lines are arranged like ridges, and if the distance between two adjacent concave lines is constant, the concave lines may not be linear. This is regarded as parallel in the present invention.

本発明に係る凹状線における凹み深さが浅すぎると、版下シート装着時に粘着層の凹みが潰れ、版胴と版下シートの間への空気が入り込んでも凹状線に沿って空気を逃がすことができないことがある。一方、凹み深さが深すぎると、平版印刷版の表面側に悪影響を与え、印刷物に非画像部の点状汚れ等の欠陥を生じる恐れがある。したがって、版下シート装着後の版下シートの版胴の曲率に沿った表面形状が平版印刷版の表面側に悪影響を及ぼさない範囲内で凹み深さは深い方が好ましい。具体的には、凹状線における凹み深さは、版下シート全体の厚さにもよるが、３μｍ〜粘着層の厚さであり、５μｍ〜粘着層の厚さの８割の深さがより好ましい。   If the dent depth in the concave line according to the present invention is too shallow, the dent of the adhesive layer will be crushed when the under-sheet is installed, and air will escape along the concave line even if air enters between the plate cylinder and the under-sheet. May not be possible. On the other hand, if the dent depth is too deep, the surface side of the lithographic printing plate may be adversely affected, and defects such as spot-like stains on non-image areas may occur on the printed matter. Accordingly, it is preferable that the dent depth is deep so long as the surface shape along the curvature of the plate cylinder of the underplate sheet after mounting the underplate sheet does not adversely affect the surface side of the planographic printing plate. Specifically, the depth of the dent in the concave line depends on the thickness of the entire under-sheet, but is 3 μm to the thickness of the adhesive layer, and more than 80 μm of the thickness of 5 μm to the thickness of the adhesive layer. preferable.

また、凹状線における凹みの幅は、凹状線の形状にもよるが、粘着層表面で５〜５００μｍ程度が好ましく、より好ましくは１０〜３００μｍ程度である。版胴粘着層界面の空気抜き作業性及び付着後の版下シート表面の平滑性の双方を考慮すれば、傾向として、凹状線における凹み深さを浅くする場合は凹みの幅は広く、凹み深さを深くする場合は凹みの幅は狭くした方が好ましい。   Moreover, although the width | variety of a dent in a concave line is based also on the shape of a concave line, about 5-500 micrometers is preferable at the adhesion layer surface, More preferably, it is about 10-300 micrometers. Considering both the air bleeding workability at the interface of the plate cylinder adhesive layer and the smoothness of the surface of the undersheet after adhesion, as a trend, the width of the dent is wide when the depth of the dent in the concave line is shallow, and the depth of the dent. In order to deepen the depth, it is preferable that the width of the dent is narrowed.

更に、本発明に係る粘着層における凹状線の間隔は、明きすぎると版下シートの間への空気が入り込んでも空気を逃がすことができないし、逆に狭すぎると版下シート装着に際してしわが誘発したり、版下シートの表面の平滑性が損なわれたりするので、１〜２５．４ｍｍが好ましく、より好ましくは２〜２０ｍｍであり、好適には３〜１０ｍｍである。   Furthermore, if the spacing between the concave lines in the pressure-sensitive adhesive layer according to the present invention is too bright, even if air enters between the under-sheets, the air cannot be released. Since it induces or the smoothness of the surface of the underlay sheet is impaired, it is preferably 1 to 25.4 mm, more preferably 2 to 20 mm, and preferably 3 to 10 mm.

本発明に係る凹状線は、版下シートの少なくとも１組は平行様に有していれば良い。すなわち、平行様に有する凹状線は、シート本体の１辺に平行様であっても、シート本体の１辺に１５〜７５度、より好ましくは３０〜６０度の角度を有する斜めの平行様線であっても良い。また、これ以外にこれと略直交する凹状線、または１５〜７５度、より好ましくは３０〜６０度の角度で交差する凹状線を有していても良い。また、これら凹状線についても必ずしも直線性を問わず、三角波状、矩形波状、サインカーブ状等、あるいはこれらを組合せた任意の形状で良い。特に、１５〜７５度、より好ましくは３０〜６０度の角度で交差する凹状線は、シート中央から両端に放射するＶ字状様であってもよい。   The concave line concerning this invention should just have at least 1 set of underlay sheets in parallel. That is, the concave line having a parallel shape is an oblique parallel line having an angle of 15 to 75 degrees, more preferably 30 to 60 degrees on one side of the sheet body, even if it is parallel to one side of the sheet body. It may be. Moreover, you may have the concave line which cross | intersects substantially orthogonal to this other than this, or the concave line which cross | intersects at an angle of 15 to 75 degree | times, More preferably, 30 to 60 degree | times. Further, these concave lines are not necessarily linear, and may be triangular waves, rectangular waves, sine curves, or any combination of these. In particular, the concave lines intersecting at an angle of 15 to 75 degrees, more preferably 30 to 60 degrees, may be V-shaped radiating from the sheet center to both ends.

本発明の版下シートの少なくとも平行様に複数有する凹状線を含む凹状線の凹み深さ、凹み幅、間隔、並びに形状はそれぞれ１本ごとに任意で良いが、版下シートの少なくとも平行様に複数有する凹状線以外の凹状線の凹み深さや間隔は、版下シートの少なくとも平行様に複数有する凹状線より深くなくかつ狭くない方が好ましい。   The concave line, the concave width, the interval, and the shape of the concave line including a plurality of concave lines having at least a plurality of parallel lines in the undercut sheet of the present invention may be arbitrary for each one. It is preferable that the depth and interval of the concave lines other than the plural concave lines are not deeper and narrower than the plural concave lines having at least a parallel shape of the underlay sheet.

粘着層の一般的形成方法としては、後述するような剥離用シートの剥離剤塗布面に粘着剤層を設け、この粘着剤層面と粘着シートを構成すべき支持体とを重ね、プレスロール等で圧着する方法や、粘着シートを構成すべき支持体に粘着剤を先に塗布し、その粘着剤層と剥離用シートと貼り合せる方法が挙げられるが、本発明においては、凹状線の設け易さ等から、予め剥離用シートの剥離剤塗布面に凹状線に対応する凸状線を設けておき、その上に表面が平滑になるように粘着剤層を設け、これと本発明に係るシート本体を重ね、プレスロール等で圧着する方法が好適である。   As a general method for forming the pressure-sensitive adhesive layer, a pressure-sensitive adhesive layer is provided on a release agent-coated surface of a release sheet as will be described later, and this pressure-sensitive adhesive layer surface and a support that constitutes the pressure-sensitive adhesive sheet are stacked, and a press roll or the like. Examples include a method of pressure bonding and a method in which a pressure-sensitive adhesive is first applied to a support to form a pressure-sensitive adhesive sheet, and the pressure-sensitive adhesive layer and the peeling sheet are bonded together. In the present invention, it is easy to provide a concave line. From the above, a convex line corresponding to the concave line is provided in advance on the release agent application surface of the release sheet, and an adhesive layer is provided thereon so that the surface is smooth, and the sheet main body according to the present invention A method of stacking and pressing with a press roll or the like is preferable.

本発明の版下シートにおける粘着層には、それに対向して離形用シートを積層させることが好ましい。離形用シートは、シート状の支持体上に、剥離剤を０．０４〜０．３ｇ／ｍ²、厚さ数μｍ程度塗布して形成される。剥離剤としては、長鎖アルキル基を有する共重合体、天然または合成ポリマーの長鎖アルキル化、パーフルオロアルキル基含有化合物、珪素その他の金属含有物、長鎖アルキル基を含まない低接着性ポリマー等が挙げられる。これらのものが、単独で、または複数種混合され、若しくはバインダーとしてのポリマー中に混合され、シート状支持体上に塗布される。 It is preferable that a release sheet is laminated on the pressure-sensitive adhesive layer in the underlay sheet of the present invention so as to face it. The release sheet is formed on a sheet-like support by applying a release agent in an amount of 0.04 to 0.3 g / m ² and a thickness of several μm. Examples of release agents include copolymers having long-chain alkyl groups, long-chain alkylation of natural or synthetic polymers, perfluoroalkyl group-containing compounds, silicon and other metal-containing materials, and low-adhesion polymers that do not contain long-chain alkyl groups. Etc. These are singly or mixed, or mixed in a polymer as a binder and coated on a sheet-like support.

本発明の版下シートには、シート本体の１辺と平行または直行する補助線を有していることが好ましい。これにより、版下シートを版胴に装着する際の位置決めをスケールを準備することなく容易にしかも正確に行えるし、版下シートの装着作業中、版下シートが斜めになったり歪んだりすれば、それに伴って補助線も斜めになったり歪んだりするので、版下シートの端等で確認するよりいち早く装着の不具合を発見できる。本発明に係る補助線は、装着不具合発見容易性の点で直線状が好ましい。凹状線が直線状でない場合であっても、凹状線は版下シートの１辺に平行様に設けるので、その１辺に平行または直行するように補助線を設ければ凹状線と平行または直行しているものとする。   The underlay sheet of the present invention preferably has an auxiliary line that is parallel or perpendicular to one side of the sheet body. This allows easy and accurate positioning without placing a scale when mounting the underblock sheet on the plate cylinder, and if the undersheet is skewed or distorted during the installation of the undersheet As a result, the auxiliary line also becomes slanted and distorted, so that it is possible to find a mounting defect earlier than checking at the end of the underlay sheet. The auxiliary line according to the present invention is preferably linear in terms of ease of finding a mounting defect. Even if the concave line is not linear, the concave line is provided so as to be parallel to one side of the underlay sheet. Therefore, if an auxiliary line is provided so as to be parallel or perpendicular to the one side, the concave line is parallel or perpendicular to the concave line. Suppose you are.

本発明に係る補助線は、版下シートにおけるシート本体が各種プラスチックシート等の透明シートを用いる場合は、シート本体の何れか面、あるいは粘着層を設けた面と反対面に後述するような何らかの層を設ける場合は、最上層表面か、その最上層が透明層であればその下層であって不透明層の内の最上層の何れか１層以上に設ければ良いが、シート本体の粘着層を設けた面と反対面の最上層表面に設けることが好ましい。また、シート本体としてアルミニウムやＳＵＳ等の金属シートや不透明ＰＥＴシート等の不透明シートを用いる場合は、粘着層を設けた面と反対側の最上層表面か、その最上層が透明層であればその下層であって不透明層の内の最上層、に補助線を設ける。   The auxiliary line according to the present invention, when the sheet body in the underlay sheet uses a transparent sheet such as various plastic sheets, is as described later on either side of the sheet body or the surface opposite to the surface provided with the adhesive layer When the layer is provided, it may be provided on the surface of the uppermost layer or at least one of the uppermost layers of the opaque layer if the uppermost layer is a transparent layer. It is preferable to provide it on the surface of the uppermost layer opposite to the surface provided with. Moreover, when using an opaque sheet such as a metal sheet such as aluminum or SUS or an opaque PET sheet as the sheet body, the uppermost layer surface opposite to the surface provided with the adhesive layer or the uppermost layer is a transparent layer An auxiliary line is provided in the lower layer and the uppermost layer of the opaque layer.

本発明に係る補助線の間隔は１〜５０ｍｍが好ましい。凹状線と平行する補助線と直交する補助線の双方を設ける場合は、両者の間隔、線幅、または補助線の色は必ずしも一致させなくても良い。また、５ｍｍ、１０ｍｍ、５０ｍｍ等の間隔の補助線をそれぞれより狭い間隔の補助線より太くするか、線の色を変えると、寸法の読取りが容易になると共に、位置決め作業能率の向上を図ることができる。更に、特定の版胴のサイズに合わせた補助線を設けても良い。複数種の補助線を設ける場合は、版下シートを構成する複数の層にそれぞれ設けても良い。   The distance between the auxiliary lines according to the present invention is preferably 1 to 50 mm. When both the auxiliary line parallel to the concave line and the auxiliary line orthogonal to the concave line are provided, the distance between them, the line width, or the color of the auxiliary line may not necessarily match. Also, if the auxiliary lines with intervals of 5 mm, 10 mm, 50 mm, etc. are made thicker than the auxiliary lines with narrower intervals, or the color of the lines is changed, the dimensions can be easily read and the positioning work efficiency can be improved. Can do. Furthermore, an auxiliary line that matches the size of a specific plate cylinder may be provided. When providing a plurality of types of auxiliary lines, they may be provided in a plurality of layers constituting the underlay sheet.

本発明の版下シートの粘着層を設ける面と反対面には、上に凸（すなわち、スキューネスＳＫが正）の凹凸を有することが好ましい。その凸高さは３〜３０μｍであることが好ましい。凸高さが３μｍ未満であると、印刷版を版胴上の所定の位置に保持する力が小さく、十分な位置ずれ防止効果が得られ難い。一方、凸高さが３０μｍを超えると、印刷版の表面側に悪影響を与え、印刷物に非画像部の点状汚れ等の欠陥を生じる恐れがある。   It is preferable that the surface opposite to the surface on which the pressure-sensitive adhesive layer of the underlay sheet of the present invention is provided has an upwardly convex (that is, skewness SK is positive) unevenness. The convex height is preferably 3 to 30 μm. When the convex height is less than 3 μm, the force for holding the printing plate at a predetermined position on the plate cylinder is small, and it is difficult to obtain a sufficient misalignment preventing effect. On the other hand, if the convex height exceeds 30 μm, the surface side of the printing plate may be adversely affected, and defects such as spot-like stains on non-image areas may occur on the printed matter.

版下シートの粘着層を設ける面と反対面への凹凸の形成方法としては、微小粒子をバインダーに分散させた液を塗布乾燥させる方法、結着剤層形成後に微小粒子を機械的圧力でバインダーフィルム中に押し込む方法、結着剤層形成後に微小粒子を電着する方法等のシート本体またはその上層に微小粒子を固定する方法や、ブラスト処理による方法、金属溶射処理による方法、放電またはレーザ加工による方法、外周面に微小突起の形成された圧延ローラにより圧延する方法等のシート本体表面を直接加工して凹凸を形成する方法、フォトレジストを塗布し、微小突起パターンを露光した後、現像によってレジスト除去を行い、エッチングする方法等が挙げられる。   As a method for forming irregularities on the surface opposite to the surface on which the pressure-sensitive adhesive layer is provided, a method of applying and drying a liquid in which fine particles are dispersed in a binder, and binding the fine particles to the binder by mechanical pressure after forming the binder layer A method of pressing into a film, a method of fixing fine particles on a sheet body or an upper layer thereof such as a method of electrodepositing fine particles after forming a binder layer, a method of blasting, a method of metal spraying, electric discharge or laser processing A method of directly processing the surface of the sheet body, such as a method of rolling with a rolling roller having microprojections formed on the outer peripheral surface, a method of forming irregularities by applying a photoresist, exposing a microprojection pattern, and then developing Examples include a method of removing the resist and etching.

上記微小粒子としては、無機及び有機の固体微粒子が用いられる。その平均粒子径は１０μｍ以上が好ましく、１５μｍ以上がより好ましく、２０μｍ以上が更に好ましい。上限は６０μｍ程度である。微小粒子の材質としては、シリカ、アルミナ、二酸化チタン、酸化亜鉛、炭酸カルシウム、各種ガラスのような無機微小粒子、ポリエチレン、ポリプロピレン、ポリスチレン、アクリル系樹脂、ポリウレタン樹脂のような有機微粒子が用いられる。版下シートに付与する微小粒子の量は、０．５〜２０ｇ／ｍ²程度が適当である。また、微小粒子は真球状をはじめ各種形状が選択できる。微小粒子は、その組成、形状は固より平均粒径や粒度分布の異なる複数種を併用しても良い。 As the fine particles, inorganic and organic solid fine particles are used. The average particle diameter is preferably 10 μm or more, more preferably 15 μm or more, and still more preferably 20 μm or more. The upper limit is about 60 μm. As the material of the fine particles, inorganic fine particles such as silica, alumina, titanium dioxide, zinc oxide, calcium carbonate, and various glasses, and organic fine particles such as polyethylene, polypropylene, polystyrene, acrylic resin, and polyurethane resin are used. The amount of fine particles to be applied to the packing sheet is about 0.5 to 20 g / m ² are suitable. The fine particles can be selected from various shapes including a spherical shape. The fine particles may be used in combination with a plurality of types having different average particle diameters and particle size distributions from the solid composition and shape.

また、版下シートの粘着層を設ける面と反対面にも粘着層を設けても良い。反対側粘着層の粘着強度は、ＪＩＳ Ｚ ０２３７による測定値を基準として、１．５〜１５Ｎ／２５ｍｍ程度、より好ましくは２〜１０Ｎ／２５ｍｍ程度であるが、版胴接着側粘着層の粘着力はその反対側粘着層のそれと同等以上であることがより好ましい。また、このように、版下シートの粘着層を設ける面と反対面にも粘着層を設けた場合は、上記離形用シートの両面に剥離剤を付与しておくか、別々の離形用シートを用いる。   Moreover, you may provide an adhesion layer also on the surface opposite to the surface which provides the adhesion layer of an underversion sheet. The adhesive strength of the opposite side adhesive layer is about 1.5 to 15 N / 25 mm, more preferably about 2 to 10 N / 25 mm, based on the measured value according to JIS Z 0237, but the adhesive strength of the plate cylinder adhesion side adhesive layer Is more preferably equal to or greater than that of the opposite adhesive layer. In addition, in this way, when an adhesive layer is provided on the surface opposite to the surface on which the adhesive layer of the underlay sheet is provided, either a release agent is applied to both surfaces of the release sheet, or for separate release Use a sheet.

以下、本発明の優位性を実施例を用いて実証するが、本発明は以下の実施例に限定されるものではない。   Hereinafter, although the superiority of the present invention is demonstrated using an example, the present invention is not limited to the following example.

実施例１
厚さ１００μｍのＰＥＴからなるシート本体の一方面の巻き取り方向及び幅方向に、それぞれ線幅０．５ｍｍの補助線を１０ｍｍ間隔で、またその５本ごとの補助線は線幅１．０ｍｍとした補助線を印刷した。 Example 1
In the winding direction and the width direction of one side of a sheet main body made of PET having a thickness of 100 μm, auxiliary lines with a line width of 0.5 mm are arranged at intervals of 10 mm, and every five auxiliary lines have a line width of 1.0 mm. Printed auxiliary lines.

上記シート本体の補助線印刷面側に、下記の処方をホモジナイザーで分散させた液を、ローラーコートにより塗布して粒子層を形成した。デュロ硬度５８、６０、６５の低密度ポリエチレン粒子（住友精化製；フロービーズＬＥ−１０８０、フロービーズＣＬ−２５０７、フロービーズＣＬ−２０８０の３種類）を粉体用遠心分離器により３〜３００μｍのサイズに分級し、大サイズ粒子を得た。また、デュロ硬度１００以上のガラスビーズ（東芝ガラス製；ＧＢ７３１）を、粉体用遠心分離器により１．５〜１００μｍのサイズに分級し、小サイズ粒子を得た。   On the auxiliary line printing surface side of the sheet body, a liquid in which the following formulation was dispersed with a homogenizer was applied by roller coating to form a particle layer. Low density polyethylene particles with Duro hardness 58, 60, 65 (Sumitomo Seika; 3 types of Flow Beads LE-1080, Flow Beads CL-2507, Flow Beads CL-2080) are 3 to 300 μm using a powder centrifuge. To obtain a large-sized particle. Further, glass beads having a durometer of 100 or more (manufactured by Toshiba Glass; GB731) were classified to a size of 1.5 to 100 μm by a powder centrifuge to obtain small size particles.

混合に際しては、各平均粒径の大粒子だけで予め面積占有率が１．５％となる処方を作り、これに小粒子を添加し、超音波分散して塗布液を得た。また、バインダーはアクリル系樹脂を用いた。尚、小粒子の面積占有率が３．０％となるように処方を作った。   At the time of mixing, a formulation having an area occupancy ratio of 1.5% in advance was made only with large particles of each average particle diameter, and small particles were added thereto and ultrasonically dispersed to obtain a coating solution. Further, an acrylic resin was used as the binder. The formulation was made so that the area occupancy of the small particles was 3.0%.

低密度ポリエチレン：大粒子（直径３〜２９０μｍ） Ｘｇ
平均粒径 ３μｍ ０．１０ｇ
平均粒径 ５μｍ ０．１１ｇ
平均粒径 ４５μｍ ０．１７ｇ
平均粒径１０５μｍ ０．２０ｇ
平均粒径１９０μｍ ０．２３ｇ
平均粒径２９０μｍ ０．３０ｇ Low density polyethylene: large particles (diameter 3 to 290 μm) Xg
Average particle size 3μm 0.10g
Average particle size 5μm 0.11g
Average particle size 45μm 0.17g
Average particle size 105μm 0.20g
Average particle size 190μm 0.23g
Average particle size 290μm 0.30g

ガラスビーズ：小粒子（直径１．５〜１００μｍ）
Ｘと同量混合
平均粒径 １．５μｍ ０．２０ｇ
平均粒径 ２０μｍ ０．５１ｇ
平均粒径 ３０μｍ ０．６２ｇ
平均粒径 ４２μｍ ０．７３ｇ
平均粒径１００μｍ ０．８２ｇ
アクリル樹脂（４０％トルエン溶液） ２０ｇ
トルエン ８０ｇ Glass beads: small particles (diameter 1.5-100 μm)
Same amount as X
Average particle size 1.5μm 0.20g
Average particle size 20μm 0.51g
Average particle size 30μm 0.62g
Average particle size 42μm 0.73g
Average particle size 100μm 0.82g
Acrylic resin (40% toluene solution) 20g
Toluene 80g

次いで、粘着剤塗布方向と直角方向に１０ｍｍ間隔で、山深さ５μｍ、山の幅２０μｍ、山の断面形状がサインカーブ状の直線状凸状線を剥離面側に平行に複数有する剥離用シートの剥離面側に水性アクリル系エマルジョン型粘着剤（東亞合成製；アロンタックＨＶＣ−３３００）を乾燥塗工量１０ｇ／ｍ²となるように塗布し、１００℃で２分乾燥させた後、この粘着剤塗布面と上記シート本体の粒子層形成面と反対面をプレスロールで貼り合せて、実施例１の版下シートを得た。尚、剥離用シートを剥離した際に粘着層に形成されていた凹状線は、上記凸状線の大きさ等と対応していた。 Next, a peeling sheet having a plurality of straight convex lines parallel to the peeling surface side at intervals of 10 mm in the direction perpendicular to the adhesive application direction, with a mountain depth of 5 μm, a mountain width of 20 μm, and a mountain cross-sectional shape having a sine curve shape. A water-based acrylic emulsion-type pressure-sensitive adhesive (manufactured by Toagosei Co., Ltd .; Arontack HVC-3300) was applied to the release surface side of the film so as to have a dry coating amount of 10 g / m ² and dried at 100 ° C. for 2 minutes. The surface on which the agent was applied and the surface opposite to the particle layer forming surface of the sheet main body were bonded together with a press roll to obtain the underlay sheet of Example 1. The concave line formed on the adhesive layer when the release sheet was peeled corresponded to the size of the convex line.

上記で作製した版下シートの凹状線の１本に沿って切断し、版胴の版下シート装着開始位置にこの凹状線の１本を合せ、剥離用シートを剥がしながら一定間隔ごとに軽く押し付けて版下シートを貼り付けて行き、版胴と版下シートの間への気泡混入がないことを確認してから、強く押し付けて貼ったところ、当然のことながら版胴と版下シートの間への空気の入り込みはなかったが、そればかりでなく、貼り付けによる寄りや歪みも誘発していないことが補助線から容易に見て取れ、版胴に沿って滑らかに貼り付けることができた。   Cut along one of the concave lines of the under-plate sheet produced above, align one of the concave lines with the under-sheet installation start position of the plate cylinder, and press lightly at regular intervals while peeling off the release sheet. Paste the stencil sheet and make sure that there are no air bubbles between the stencil cylinder and the stencil sheet. There was no air intrusion, but not only that, but it was also easy to see from the auxiliary lines that there was no slippage or distortion caused by sticking, and it was possible to stick it smoothly along the plate cylinder.

そこで、上記と同様に版下シートの凹状線の１本に沿って切断し、別の版胴において版下シート装着開始位置にこの凹状線の１本を合せ、一定間隔ごとに軽く押し付けて版下シートを貼り付けて行き、貼り付け途中で意識的に版胴と版下シートの間への空気を入り込ませたが、入り込んだ空気は凹状線に沿って逃がすことができ、貼り付けによる寄りや歪みもなく、上記と同様に版胴に沿って滑らかに貼り付けることができた。   Therefore, in the same manner as described above, cut along one of the concave lines of the under-sheet, align one of the concave lines with the under-sheet attachment start position in another plate cylinder, and press it lightly at regular intervals. The lower sheet was pasted, and air was admitted between the plate cylinder and the lower sheet consciously during the pasting, but the air that entered could escape along the concave line. There was no distortion and it could be smoothly applied along the plate cylinder as described above.

次に、印刷版として、三菱製紙製のシルバーディジプレートＳＤＰ−ＦＲを用い、走査露光装置（イメージセッター）として大日本スクリーン製造製の赤色ＬＤレーザー搭載のＦＴ−Ｒ５０５５を用いて走査露光した。次に、三菱製紙製の自動現像装置Ｐ−５１０Ｒで現像処理して製版した。現像液はＳＬＭ−ＡＣ、安定液はＳＬＭ−ＳＴIII（両者とも三菱製紙製）を用いた。   Next, a silver digital plate SDP-FR manufactured by Mitsubishi Paper Industries was used as a printing plate, and scanning exposure was performed using a FT-R 5055 equipped with a red LD laser manufactured by Dainippon Screen Manufacturing as a scanning exposure device (image setter). Next, it was subjected to development processing with an automatic developing device P-510R manufactured by Mitsubishi Paper making to make a plate. The developer used was SLM-AC, and the stabilizer used was SLM-STIII (both manufactured by Mitsubishi Paper Industries).

次に、得られた平版印刷版を版下シートを貼り付けた版胴上に装着し、三菱重工業社製３Ｈ−４片面印刷機にて２０００枚印刷した。   Next, the obtained lithographic printing plate was mounted on a plate cylinder on which a base sheet was pasted, and 2000 sheets were printed by a 3H-4 single-sided printing machine manufactured by Mitsubishi Heavy Industries, Ltd.

印刷後、印刷開始直後の印刷物に印刷された罫線の位置と、２０００枚印刷後の印刷物に印刷された罫線の位置とを比較し、印刷開始直後及び２０００枚印刷後での版胴上における平版印刷版の位置ずれを測定したところ、版ずれ、版ずれの差とも極めて良い結果が得られた。また、２０００枚印刷後の印刷物で印刷ムラを評価したところ、印刷ムラは全く発生しておらず、良好な印刷物が得られた。   After printing, the position of the ruled line printed on the printed material immediately after the start of printing is compared with the position of the ruled line printed on the printed material after printing 2000 sheets, and the lithographic plate on the plate cylinder immediately after starting printing and after printing 2000 sheets When the positional deviation of the printing plate was measured, extremely good results were obtained for both the plate deviation and the plate deviation. Further, when printing unevenness was evaluated on the printed material after printing 2000 sheets, no printing unevenness occurred, and a good printed material was obtained.

比較例１
厚さ１００μｍのＰＥＴからなるシート本体の一方面に、実施例１で用いた粒子分散液を実施例１と同様にして塗布し、粒子層を設けた。 Comparative Example 1
The particle dispersion used in Example 1 was applied to one side of a sheet main body made of PET having a thickness of 100 μm in the same manner as in Example 1 to provide a particle layer.

次に、剥離面側に凸状線を有さない平滑な剥離用シートの剥離面側に実施例１で用いた粘着剤を乾燥塗工量１０ｇ／ｍ²となるように塗布し、１００℃で２分乾燥させた後、この粘着剤塗布面と上記で作製したシート本体の粒子層形成面と反対面をプレスロールで貼り合せて、比較例１の版下シートを得た。 Next, the pressure-sensitive adhesive used in Example 1 was applied to the release surface side of a smooth release sheet having no convex line on the release surface side so that the dry coating amount was 10 g / m ^2, and 100 ° C. Then, the pressure-sensitive adhesive-coated surface and the surface opposite to the particle layer forming surface of the sheet body prepared above were bonded together with a press roll to obtain an underversion sheet of Comparative Example 1.

上記で作製した比較例１の版下シートの剥離用シートを剥がしながら一定間隔ごとに軽く押し付けて版下シートを貼り付けて行き、貼り付け途中で意識的に版胴と版下シートの間への空気を入り込ませたところ、入り込んだ空気を逃がすことができず、その部分が盛り上がってしまった。更に、空気混入部を押して空気を抜こうとすると、盛り上がりはなくすことができたが、その部分に寄りや歪みが誘発した。   While peeling off the release sheet of the underlay sheet of Comparative Example 1 produced above, it was lightly pressed at regular intervals to attach the underlay sheet, and consciously between the plate cylinder and underplate sheet during the attachment. When I let the air in, I couldn't let the air in, and that part got excited. Furthermore, when the air mixing part was pushed to remove air, the swell could be eliminated, but a shift or distortion was induced in that part.

次に、実施例１で用いた平版印刷版及び印刷機を用い、比較例１の版下シートを貼り付けた版胴上に平版印刷版を装着し、三菱重工業社製３Ｈ−４片面印刷機にて２０００枚印刷した。   Next, using the planographic printing plate and printing machine used in Example 1, the planographic printing plate was mounted on the plate cylinder on which the underlay sheet of Comparative Example 1 was attached, and a 3H-4 single-sided printing machine manufactured by Mitsubishi Heavy Industries, Ltd. Printed 2000 sheets.

印刷後、印刷開始直後の印刷物に印刷された罫線の位置と、２０００枚印刷後の印刷物に印刷された罫線の位置とを比較し、印刷開始直後及び２０００枚印刷後での版胴上における平版印刷版の位置ずれを測定したところ、版ずれ、版ずれの差とも極めて良い結果が得られた。しかしながら、２０００枚印刷後の印刷物上で印刷ムラを評価したところ、版下シートの寄りや歪みが誘発した位置に対応する部分に印刷ムラが発生し、良好な印刷物は得られなかった。   After printing, the position of the ruled line printed on the printed material immediately after the start of printing is compared with the position of the ruled line printed on the printed material after printing 2000 sheets, and the lithographic plate on the plate cylinder immediately after starting printing and after printing 2000 sheets When the positional deviation of the printing plate was measured, extremely good results were obtained for both the plate deviation and the plate deviation. However, when printing unevenness was evaluated on a printed material after printing 2,000 sheets, printing unevenness occurred in a portion corresponding to a position where a deviation or distortion of the underlay sheet was induced, and a good printed material could not be obtained.

実施例２
粘着剤塗布方向と３０度及び１５０度の角度でそれぞれ交差する、１０ｍｍ間隔で、山深さ５μｍ、山の幅２０μｍ、山の断面形状が逆Ｕ字状の２組の直線状凸状線を剥離面側にそれぞれ平行に複数有する剥離用シートの剥離面側に、実施例１で用いた粘着剤を乾燥塗工量１０ｇ／ｍ²となるように塗布し、１００℃で２分乾燥させた後、この粘着剤塗布面と実施例１で作製した補助線及び粒子層を有するシート本体の粒子層形成面と反対面をプレスロールで貼り合せて、実施例２の版下シートを得た。 Example 2
Two sets of linear convex lines having a mountain depth of 5 μm, a mountain width of 20 μm, and a mountain cross-sectional shape of an inverted U-shape are intersected with the adhesive application direction at angles of 30 degrees and 150 degrees, respectively. The pressure-sensitive adhesive used in Example 1 was applied to the release surface side of a release sheet having a plurality in parallel with the release surface side so as to have a dry coating amount of 10 g / m ² and dried at 100 ° C. for 2 minutes. Then, the pressure-sensitive adhesive-coated surface and the surface opposite to the particle layer forming surface of the sheet main body having the auxiliary line and the particle layer produced in Example 1 were bonded together with a press roll to obtain an underlay sheet of Example 2.

この版下シートの粘着剤塗布方向と直角に切断し、版下シート装着開始位置にこの切断線を合せ、一定間隔ごとに軽く押し付けて版下シートを貼り付けて行き、貼り付け途中で意識的に版胴と版下シートの間への空気を入り込ませたが、入り込んだ空気は凹状線に沿って逃がすことができ、また貼り付けによる寄りや歪みも誘発していないことが補助線から容易に見て取れ、実施例１と同様に版胴に沿って滑らかに貼り付けることができた。   Cut this underlay sheet at right angles to the adhesive application direction, align this cutting line at the start position of the undersheet attachment, and lightly press it at regular intervals to attach the underlay sheet. The air entered between the plate cylinder and the under-plate sheet was allowed to escape along the concave line, and it was easy from the auxiliary line that no slippage or distortion was caused by sticking. As in Example 1, it could be applied smoothly along the plate cylinder.

次に、実施例１で用いた平版印刷版及び印刷機を用い、実施例２の版下シートを貼り付けた版胴上に平版印刷版を装着し、三菱重工業社製３Ｈ−４片面印刷機にて２０００枚印刷した。   Next, using the planographic printing plate and printing machine used in Example 1, the planographic printing plate was mounted on the plate cylinder on which the underlay sheet of Example 2 was attached, and a 3H-4 single-sided printing machine manufactured by Mitsubishi Heavy Industries, Ltd. Printed 2000 sheets.

印刷後、印刷開始直後の印刷物に印刷された罫線の位置と、２０００枚印刷後の印刷物に印刷された罫線の位置とを比較し、印刷開始直後及び２０００枚印刷後での版胴上における平版印刷版の位置ずれを測定したところ、実施例１と同様に、版ずれ、版ずれの差とも極めて良い結果が得られた。また、２０００枚印刷後の印刷物で印刷ムラを評価したところ、印刷ムラは全く発生しておらず、良好な印刷物が得られた。   After printing, the position of the ruled line printed on the printed material immediately after the start of printing is compared with the position of the ruled line printed on the printed material after printing 2000 sheets, and the lithographic plate on the plate cylinder immediately after starting printing and after printing 2000 sheets When the positional deviation of the printing plate was measured, as in Example 1, extremely good results were obtained for both the plate deviation and the plate deviation. Further, when printing unevenness was evaluated on the printed material after printing 2000 sheets, no printing unevenness occurred, and a good printed material was obtained.

実施例３
粘着剤塗布方向と直角方向に１０ｍｍ間隔で、山深さ５μｍ、山の幅２０μｍ、山の断面形状がΛ字状の直線状凸状線、及びこれと４５度及び１３５度の角度でそれぞれ交差する、１０ｍｍ間隔で、山深さ５μｍ、山の幅２０μｍ、山の断面形状が逆Ｕ字状の２組の直線状凸状線を剥離面側にそれぞれ平行に複数有する剥離用シートの剥離面側に、実施例１で用いた粘着剤を乾燥塗工量１０ｇ／ｍ²となるように塗布し、１００℃で２分乾燥させた後、この粘着剤塗布面と実施例１で作製した補助線及び粒子層を有するシート本体の粒子層形成面と反対面をプレスロールで貼り合せて、実施例３の版下シートを得た。 Example 3
A linear convex line with a mountain depth of 5 μm, a mountain width of 20 μm, and a mountain cross-sectional shape of Λ-shaped at intervals of 10 mm in a direction perpendicular to the adhesive application direction, and intersects at an angle of 45 degrees and 135 degrees, respectively. The peeling surface of the peeling sheet having a plurality of two straight convex lines parallel to each other on the peeling surface side at intervals of 10 mm, having a mountain depth of 5 μm, a mountain width of 20 μm, and a cross-sectional shape of the mountain inverted U-shaped. On the side, the pressure-sensitive adhesive used in Example 1 was applied to a dry coating amount of 10 g / m ² , dried at 100 ° C. for 2 minutes, and then the pressure-sensitive adhesive-coated surface and the auxiliary prepared in Example 1 The surface opposite to the particle layer forming surface of the sheet main body having the line and the particle layer was bonded with a press roll to obtain an underlay sheet of Example 3.

この版下シートの粘着剤塗布方向と直角方向の凹状線の１本に沿って切断し、版下シート装着開始位置にこの凹状線の１本を合せ、一定間隔ごとに軽く押し付けて版下シートを貼り付けて行き、貼り付け途中で意識的に版胴と版下シートの間への空気を入り込ませたが、入り込んだ空気は凹状線に沿って逃がすことができ、また貼り付けによる寄りや歪みも誘発していないことが補助線から容易に見て取れ、実施例１と同様に版胴に沿って滑らかに貼り付けることができた。   Cut along one of the concave lines in the direction perpendicular to the adhesive application direction of the under-sheet, align one of the concave lines at the starting position of the under-sheet, and press it lightly at regular intervals. In the middle of pasting, the air between the plate cylinder and the lower sheet was consciously entrapped, but the entrapped air can escape along the concave line. It was easily seen from the auxiliary line that no distortion was induced, and it was possible to smoothly apply it along the plate cylinder as in Example 1.

次に、実施例１で用いた平版印刷版及び印刷機を用い、実施例３の版下シートを貼り付けた版胴上に平版印刷版を装着し、三菱重工業社製３Ｈ−４片面印刷機にて２０００枚印刷した。   Next, using the planographic printing plate and printing machine used in Example 1, the planographic printing plate was mounted on the plate cylinder on which the underlay sheet of Example 3 was attached, and a 3H-4 single-sided printing machine manufactured by Mitsubishi Heavy Industries, Ltd. Printed 2000 sheets.

印刷後、印刷開始直後の印刷物に印刷された罫線の位置と、２０００枚印刷後の印刷物に印刷された罫線の位置とを比較し、印刷開始直後及び２０００枚印刷後での版胴上における平版印刷版の位置ずれを測定したところ、実施例１と同様に、版ずれ、版ずれの差とも極めて良い結果が得られた。また、２０００枚印刷後の印刷物で印刷ムラを評価したところ、印刷ムラは全く発生しておらず、良好な印刷物が得られた。   After printing, the position of the ruled line printed on the printed material immediately after the start of printing is compared with the position of the ruled line printed on the printed material after printing 2000 sheets, and the lithographic plate on the plate cylinder immediately after starting printing and after printing 2000 sheets When the positional deviation of the printing plate was measured, as in Example 1, extremely good results were obtained for both the plate deviation and the plate deviation. Further, when printing unevenness was evaluated on the printed material after printing 2000 sheets, no printing unevenness occurred, and a good printed material was obtained.

Claims (3)

シート本体の少なくとも一方面に粘着層を有する版下シートであって、該粘着層に複数の凹状線を平行様に有することを特徴とする版下シート。   An underprint sheet having an adhesive layer on at least one surface of a sheet body, wherein the adhesive layer has a plurality of concave lines in parallel. 上記凹状線がシート本体の１辺と平行様に有する請求項１記載の版下シート。   2. The underlay sheet according to claim 1, wherein the concave line is parallel to one side of the sheet body. 上記シート本体の１辺と平行または直行する補助線を有する請求項１または２記載の版下シート。   The underlay sheet according to claim 1, further comprising an auxiliary line parallel to or perpendicular to one side of the sheet main body.