JP3202304B2 - Base paper for heat sensitive stencil - Google Patents
Base paper for heat sensitive stencilInfo
- Publication number
- JP3202304B2 JP3202304B2 JP04764892A JP4764892A JP3202304B2 JP 3202304 B2 JP3202304 B2 JP 3202304B2 JP 04764892 A JP04764892 A JP 04764892A JP 4764892 A JP4764892 A JP 4764892A JP 3202304 B2 JP3202304 B2 JP 3202304B2
- Authority
- JP
- Japan
- Prior art keywords
- sensitive stencil
- heat
- curl
- stencil sheet
- flow direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Printing Plates And Materials Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、感度、画質が優れ、し
かも取扱性、製版時の搬送性も向上した感熱孔版用原紙
及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive stencil sheet having excellent sensitivity and image quality, improved handling properties, and improved transportability during plate making, and a method for producing the same.
【０００２】[0002]
【従来の技術】赤外線、サーマルヘッド、レーザー光等
の手段を用いて原紙を穿孔製版し、これを印刷用の版と
して使う印刷方式は、簡便な印刷方式として広く普及し
ている。これら穿孔方式の中でも、サーマルヘッドを使
用したデジタル穿孔方式は、地汚れの発生が無いこと、
文字や図形のデジタル処理が可能なこと、簡便性が良い
ことなどの理由により、現在では穿孔方式の主流となり
大部分を占めている。また近年、ハードメーカーにおい
ては該製版機の差別化を図るための改良が行われ、サー
マルヘッドの微小化、高精細化（１６ｄｏｔ／ｍｍ以
上）が進められ、またサーマルヘッドを長寿命化するた
めの低エネルギー化が進められている。更に、市場ニー
ズに合った自動化が進められ、製版から印刷、排版まで
全自動でできる機種も出てきている。従来、この方式に
使用する感熱孔版用原紙は、薄葉紙、不織布、紗等の多
孔質支持体上に、通常は接着剤を用いて、１〜５μｍの
熱可塑性フィルムを積層した構成のものであり、前記し
たような製版機の改良が進むにつれ、感熱孔版用原紙も
サーマルヘッドの微小化、高精細化に対応した高画質
化、あるいはサーマルヘッドの低エネルギー化に対応し
た高感度化、更にはそれらを満足した上での自動機への
対応化等の検討がなされている。感熱孔版用原紙の感
度、画質を高める方法としては、感熱孔版用原紙表面の
平滑性を高める方法が既に知られている。これは、表面
の平滑性を上げることで、サーマルヘッドとの密着を良
くし、熱をより効率良く伝達させるという考え方に立っ
ている。従来の感熱孔版用原紙は、薄葉紙の様な表面平
滑性の低い多孔質支持体上に熱可塑性フィルムをラミネ
ートしたものであるが、この場合、支持体表面の凹凸に
沿ってフィルムも変形するため、通常は表面平滑性の低
いものしかできない。特に厚さが２μｍ以下で融点が低
く、熱収縮率の高い高感度フィルムを用いた場合は、フ
ィルムの剛度が低く、支持体の凹凸に沿った変形がより
現れ易くなる。この支持体の凹凸に沿った変形を防ぎ、
表面平滑性を高めるため、例えば鏡面ロールにフィルム
を密着させた状態で支持体とラミネートする方法（特公
平３−５２３５４号公報）が提案されているが、特殊な
製造設備が必要なこと、フィルムの取扱いに細心の注意
が必要なこと、更には鏡面ロールの清浄度を保つのが困
難なこと等の問題があり、しかも該発明をもってして
も、２μｍ以下の厚さで融点が低く熱収縮率の高い高感
度フィルムを使用した場合は、所望の感熱孔版用原紙を
得ることはできなかった。また、感熱孔版用原紙の、裁
断時の取扱性、製版印刷時の搬送適性を向上させる方法
としては、支持体とフィルムを接着剤を介してラミネー
トするときに、支持体あるいはフィルムを、水分あるい
は熱で伸縮させ、各々のバランスを取ることによりカー
ルを少なくする方法（特開平３−１６７９４号公報）が
提案されている。この方法では確かにカールが少なくな
り、裁断時の取扱性、製版時の搬送適性は良くなるが、
感熱孔版用原紙製造時の水分あるいは温度管理が複雑に
なること、更にはこのようにして作られた感熱孔版用原
紙は、前記したような支持体表面の凹凸に沿った変形が
フィルム表面に起こるため、表面平滑性が低く、感度、
画質の劣ったものしかできないという品質的問題点もあ
った。2. Description of the Related Art A printing method in which a base paper is perforated and made by using means such as an infrared ray, a thermal head, a laser beam and the like, and this is used as a printing plate is widely spread as a simple printing method. Among these perforation methods, the digital perforation method using a thermal head has no
At present, the perforation method has become the mainstream and occupies a large part because of the digital processing of characters and figures and the simplicity. In recent years, hardware manufacturers have made improvements for differentiating the plate making machine, miniaturizing and increasing the definition of the thermal head (16 dots / mm or more), and extending the life of the thermal head. Energy is being reduced. Furthermore, automation has been promoted to meet the needs of the market, and there are models that can perform fully automatic operations from plate making to printing and plate discharging. Conventionally, the heat-sensitive stencil base paper used in this method has a structure in which a thermoplastic film of 1 to 5 μm is laminated on a porous support such as thin paper, nonwoven fabric, or gauze, usually using an adhesive. As the plate making machine has been improved as described above, the heat-sensitive stencil base paper has also been miniaturized in the thermal head, has a high image quality corresponding to the high definition, or has a high sensitivity corresponding to the low energy of the thermal head. After satisfying these requirements, studies are being made on adapting to an automatic machine. As a method for improving the sensitivity and image quality of the heat-sensitive stencil sheet, a method for improving the smoothness of the surface of the heat-sensitive stencil sheet has already been known. This is based on the idea that by improving the smoothness of the surface, the contact with the thermal head is improved and heat is more efficiently transmitted. Conventional heat-sensitive stencil base paper is obtained by laminating a thermoplastic film on a porous support having a low surface smoothness such as thin paper, but in this case, the film also deforms along the unevenness of the support surface. Usually, only those having low surface smoothness can be obtained. In particular, when a high-sensitivity film having a thickness of 2 μm or less and a low melting point and a high heat shrinkage is used, the rigidity of the film is low, and deformation along the unevenness of the support is more likely to appear. Prevent deformation along the irregularities of this support,
In order to enhance the surface smoothness, for example, a method of laminating the film with a support in a state where the film is in close contact with a mirror roll (Japanese Patent Publication No. 3-52354) has been proposed. Requires careful handling and furthermore, it is difficult to maintain the cleanliness of the mirror roll, and even with the invention, the thickness is less than 2 μm, the melting point is low and the heat shrinkage is low. When a high-sensitivity high-sensitivity film was used, a desired heat-sensitive stencil base paper could not be obtained. In addition, as a method of improving the handling property at the time of cutting and the transportability at the time of plate making printing of the heat-sensitive stencil base paper, when laminating the support and the film via an adhesive, the support or the film is treated with water or A method has been proposed in which the curl is reduced by expanding and contracting with heat to balance each other (JP-A-3-16794). This method certainly reduces the curl, improves the handling at the time of cutting, and the transport suitability at the time of plate making,
The moisture or temperature control during the production of the heat-sensitive stencil base paper becomes complicated, and furthermore, in the heat-sensitive stencil base paper thus produced, the deformation along the irregularities of the support surface as described above occurs on the film surface. Therefore, surface smoothness is low, sensitivity,
There was also a quality problem that only images with poor image quality could be made.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、従来の感熱
製版用原紙が有する欠点を解消し、表面平滑性の高い、
高感度、高画質で、しかも取扱性、製版時の搬送性が良
好な感熱孔版用原紙を提供することを目的としてなされ
たものである。DISCLOSURE OF THE INVENTION The present invention solves the drawbacks of the conventional heat-sensitive stencil sheet and has a high surface smoothness.
An object of the present invention is to provide a heat-sensitive stencil sheet having high sensitivity, high image quality, and excellent handling properties and transportability during plate making.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
検討した結果、流れ方向と幅方向のカールを少なくする
のでは無く、流れ方向（以下ＭＤと略す。）と幅方向
（以下ＣＤと略す。）のカールの比を規定することで、
支持体表面の凹凸の影響を受けない表面性を持ち、しか
も取扱性、搬送性が向上した感熱孔版用原紙を見いだ
し、本発明をなすに至った。即ち、本発明は、下記の特
徴をもつ感熱孔版用原紙及びその製造方法である。 １．ラミネート部及び／又はラミネート前後部で、多孔
質支持体及び／又は熱可塑性フィルムを、流れ方向と幅
方向に張った状態で、多孔質支持体上に熱可塑性フィル
ムを積層してなる感熱孔版用原紙であって、熱可塑性フ
ィルム側表面の王研式平滑度が１０００秒以上であり、
下記測定法で測定される幅方向と流れ方向とのカール比
が０．２〜５．０であることを特徴とする感熱孔版用原
紙。 測定法：感熱孔版用原紙を平坦な面の上に置き、この感
熱孔版用原紙の流れ方向に平行な１０ｃｍの直線を一辺
とする正方形の対角線上に切込みを入れる。切込みの入
った感熱孔版用原紙は、流れ方向、幅方向のカールの強
さにより、図１の様に変化する。このカールの強さを、
図１の流れ方向のａ点とｃ点間の長さ、及び幅方向のｂ
点とｄ点間の長さとし、流れ方向と幅方向のカールの比
を式１より求める。As a result of investigations to achieve the above object, it has been found that curling in the flow direction and width direction is not reduced, but in the flow direction (hereinafter abbreviated as MD) and width direction (hereinafter abbreviated as CD). )) By defining the curl ratio,
The present inventors have found a heat-sensitive stencil sheet having a surface property not affected by the unevenness of the surface of the support, and having improved handleability and transportability, and accomplished the present invention. That is, the present invention is a heat-sensitive stencil sheet having the following characteristics and a method for producing the same. 1. For a heat-sensitive stencil obtained by laminating a thermoplastic film on a porous support in a state where a porous support and / or a thermoplastic film is stretched in a flow direction and a width direction at a laminating part and / or before and after lamination. In the base paper, the Oken type smoothness of the thermoplastic film side surface is 1000 seconds or more,
A heat sensitive stencil sheet characterized in that the curl ratio between the width direction and the flow direction measured by the following measuring method is 0.2 to 5.0. Measurement method: A heat sensitive stencil sheet is placed on a flat surface, and a cut is made on a diagonal line of a square having a straight line of 10 cm parallel to the flow direction of the heat sensitive stencil sheet. The heat-sensitive stencil sheet with a cut changes as shown in FIG. 1 depending on the curl strength in the flow direction and the width direction. The strength of this curl
The length between points a and c in the flow direction in FIG. 1 and b in the width direction
Using the length between the point and the point d, the ratio of the curl in the flow direction and the curl in the width direction is obtained from Expression 1.
【０００５】[0005]
【図１】 FIG.
【０００６】[0006]
【式１】 (Equation 1)
【０００７】２．多孔質支持体と熱可塑性フィルムを積
層してなる感熱孔版用原紙を製造するに際して、ラミネ
ート部及び／又はラミネート前後部で、多孔質支持体及
び／又は熱可塑性フィルムを、流れ方向と幅方向に張っ
た状態でラミネートすることを特徴とし、更に好ましく
は、多孔質支持体及び／又は熱可塑性樹脂フィルムを幅
方向に張る装置に、エキスパンダーロール及び／又は弓
型バーを用いる１．記載の感熱孔版用原紙の製造方法。[0007] 2. When producing a heat-sensitive stencil sheet made by laminating a porous support and a thermoplastic film, the porous support and / or the thermoplastic film are moved in the flow direction and the width direction at the laminating part and / or before and after the lamination. It is characterized in that it is laminated in a stretched state, and more preferably, an expander roll and / or a bow bar is used for a device for stretching a porous support and / or a thermoplastic resin film in the width direction. The method for producing a heat-sensitive stencil sheet according to the above.
【０００８】以下に、本発明を更に詳しく説明する。本
発明で使用する多孔質支持体は、熱可塑性フィルムを支
持し、印刷時にインキが通過できる様な構成を持つもの
であり、例えば、木材パルプ、麻、みつまた、こうぞの
ような天然繊維、及びレーヨン、ビニロン、ナイロン、
ポリエステル、ポリフェニレンサルファイト、アクリロ
ニトリルなどのような化学繊維を、湿式あるいは乾式で
シート状にしたものである。米坪、厚さについては特に
限定されるものでは無いが、インキ消費量、あるいは強
度、取扱性の点より５〜２０ｇ／ｍ2 程度のものが適当
である。また、支持体表面の平滑性を高め、フィルムを
ラミネートした後の平滑性をより高めるため、スーパー
カレンダー処理がなされてもよい。Hereinafter, the present invention will be described in more detail. The porous support used in the present invention supports the thermoplastic film and has a configuration that allows the passage of ink at the time of printing.For example, wood pulp, hemp, mitsu, natural fibers such as mortar, And rayon, vinylon, nylon,
It is a sheet made of chemical fiber such as polyester, polyphenylene sulphite, acrylonitrile, etc. by a wet or dry method. The rice tsubo and thickness are not particularly limited, but those of about 5 to 20 g / m 2 are suitable in terms of ink consumption, strength, and handleability. Further, in order to increase the smoothness of the surface of the support and to further enhance the smoothness after laminating the film, a super calender treatment may be performed.
【０００９】本発明で使用する熱可塑性フィルムは、製
版時の加熱により穿孔、収縮するものであり、ポリエチ
レン、ポリプロピレン等のポリオレフィンフィルム、ポ
リスチレンフィルム、ポリエステルフィルム、ポリ塩化
ビニルフィルム、ポリ塩化ビニリデンフィルム、ポリフ
ッ化ビニリデン等が挙げられる。本発明において、フィ
ルムの組成あるいは特性は、特に限定されるものでは無
いが、本発明の目的である高感度感熱製版用原紙を得る
ためには、５μｍ以下、望ましくは２μｍ以下の厚さで
熱収縮率が高く、融点の低い高感度フィルムが好適であ
る。また、これらフィルムにあらかじめ、帯電防止剤、
スティック防止剤等の処理がなされても良い。The thermoplastic film used in the present invention is a film which is perforated and shrunk by heating at the time of plate making. Polyolefin films such as polyethylene and polypropylene, polystyrene films, polyester films, polyvinyl chloride films, polyvinylidene chloride films, And polyvinylidene fluoride. In the present invention, the composition or characteristics of the film are not particularly limited. However, in order to obtain the base paper for high-sensitivity thermosensitive plate making which is the object of the present invention, the thickness of the film is preferably 5 μm or less, preferably 2 μm or less. A high-sensitivity film having a high shrinkage and a low melting point is suitable. In addition, an antistatic agent,
A treatment with a stick preventing agent or the like may be performed.
【００１０】前記支持体及びフィルムを、通常は接着剤
を介してラミネートするのであるが、この接着剤として
は従来公知の接着剤が使え、例えば、ポリエステル系樹
脂、ポリ酢酸ビニル系樹脂、エチレン−酢酸ビニル系樹
脂、ポリアクリル酸エステル系樹脂、塩化ビニル−酢酸
ビニル共重合体樹脂等が挙げられる。接着剤の塗布量
は、量が多すぎると感度、画質の低下が起こり、少ない
と接着力が不足し印刷時の耐刷性が悪くなるため、これ
らの兼ね合いで決められ、０．１〜７ｇ／ｍ2 、好まし
くは０．３〜３ｇ／ｍ2 の範囲で用いるのがよい。また
必要に応じて帯電防止剤、塗工性改質剤の様な添加剤を
使用しても良い。The support and the film are usually laminated with an adhesive. As the adhesive, a conventionally known adhesive can be used, for example, polyester resin, polyvinyl acetate resin, ethylene-based resin. Examples include a vinyl acetate resin, a polyacrylate resin, and a vinyl chloride-vinyl acetate copolymer resin. If the amount of the adhesive applied is too large, the sensitivity and the image quality deteriorate. If the amount is too small, the adhesive strength is insufficient and the printing durability at the time of printing deteriorates. / M 2 , preferably in the range of 0.3 to 3 g / m 2 . If necessary, additives such as an antistatic agent and a coating property modifier may be used.
【００１１】本発明の、感熱孔版用原紙表面の王研式平
滑度が１０００秒以上で、前記測定法におけるカール比
が０．５〜２．０の感熱孔版用原紙は、ラミネート部及
び／又はラミネート前後部で、多孔質支持体及び／又は
熱可塑性フィルムを、ＭＤとＣＤに張った状態でラミネ
ートすることにより製造される。多孔質支持体と熱可塑
性フィルムをラミネートし、感熱孔版用原紙を製造する
ためのラミネーターにおいて、支持体または／及びフィ
ルム上に接着剤を塗布し、接着性を有する間に支持体と
フィルムをラミネートするのであるが、通常はラミネー
トを安定して行うため、ある程度の張力を持ってラミネ
ートされる。この張力は、通常、支持体あるいはフィル
ムのフィードロール、ガイドロール、あるいはラミネー
ト後のニップロールの差速を利用したＭＤに掛かる張力
であるが、本発明においては、以下の様な方法でＣＤに
も張力が掛かるようにする。The heat-sensitive stencil sheet of the present invention having a surface of the heat-sensitive stencil sheet having an Oken-type smoothness of 1000 seconds or more and a curl ratio of 0.5 to 2.0 in the above-mentioned measuring method may have a laminate portion and / or It is manufactured by laminating a porous support and / or a thermoplastic film on MD and CD before and after lamination. A laminator for laminating a porous support and a thermoplastic film to produce a heat-sensitive stencil sheet, applying an adhesive on the support or / and the film, and laminating the support and the film while having adhesiveness. Usually, in order to stably perform lamination, lamination is performed with a certain degree of tension. This tension is usually a tension applied to the MD using a differential speed of a support roll or a film feed roll, a guide roll, or a nip roll after lamination. In the present invention, the CD is also applied to the CD by the following method. Apply tension.
【００１２】即ち、ラミネート部または／及びラミネー
ト前後部に、エキスパンダーロールまたは／及び弓バー
の様なＣＤに張力が掛かる装置を取り付ける。ここでい
うエキスパンダーロールとは、曲率を持った軸に、摩擦
係数が大きく伸縮性のあるゴム状の材質のものを巻き付
けたロール、あるいは、いわゆるフラットエキスパンダ
ーロールと呼ばれているストレートな軸を持つものが挙
げられる。また、ここでいう弓バーとは曲率を持ったバ
ーのことであり、そのバーを滑りながら通過させること
でシートをＣＤに広げる効果を持つものである。本発明
においては、ＣＤに伸ばす効果の大きいエキスパンダー
ロールが有効であり、またシートに掛かる負荷を少なく
するための回転駆動装置が付いているものが好ましい。
ＣＤに伸ばす装置の取付位置としては、ラミネート部ま
たは／及びラミネート前後部が良い。ラミネート前後部
にそれらＣＤに伸ばす装置を取り付けた場合は、ラミネ
ート位置と離れているとＣＤに伸ばした効果が下がるた
め、可能な限りラミネート位置に近い方が良い。また、
支持体側及びフィルム側の両方、あるいは片方に取り付
け、各々のＣＤに広げる効果を調整できるようにするこ
とが望ましい。That is, a device for applying tension to the CD, such as an expander roll or / and a bow bar, is attached to the laminating section and / or the front and rear sections of the laminating section. The expander roll referred to here is a roll in which a rubbery material having a large coefficient of friction and elasticity is wound around a shaft having a curvature, or a straight shaft called a so-called flat expander roll. Things. The bow bar referred to here is a bar having a curvature, and has an effect of spreading a sheet to a CD by sliding through the bar. In the present invention, an expander roll having a large effect of stretching the CD is effective, and a roll having a rotation drive device for reducing the load applied to the sheet is preferable.
As a mounting position of the device for extending the CD, a laminating part and / or a laminating front and rear part are preferable. When a device for stretching the CD is attached to the front and rear portions of the laminate, the effect of stretching the CD is reduced if the device is far from the lamination position. Therefore, it is better to be as close as possible to the lamination position. Also,
It is desirable to attach to both or one of the support side and the film side so that the effect of spreading to each CD can be adjusted.
【００１３】これら方法によるＭＤに掛かる張力と、Ｃ
Ｄに掛かる張力のバランスは、使用する支持体、フィル
ムの強度、伸び等の物性、あるいは幅、厚さ等の形状に
より変わり、またできあがった感熱孔版用原紙の平滑
度、カールの数値を所望の数値にするため調整されるも
のであるが、ＭＤ、ＣＤ共に、ラミネート位置で０．０
３〜７％に伸びる程度の張力に調整されることが望まし
い。また、ラミネート部において、ニップロールを使っ
た加圧方法、あるいはニップロールを使わないでシート
の張力により加圧する方法等あるが、ラミネート部がエ
キスパンダーロールの場合はニップロールを使わない加
圧方法が好ましい。またラミネート部において、支持体
側を外にしても、フィルム側を外にしてもどちらの通紙
方法でも良く、その時のラミネートロールに抱かせる角
度も特に限定されるものではない。The tension applied to the MD by these methods and C
The balance of the tension applied to D varies depending on the support used, physical properties such as the strength and elongation of the film, or the shape such as the width and thickness, and the smoothness and curl values of the completed heat-sensitive stencil base paper are adjusted to the desired values. It is adjusted to obtain a numerical value.
It is desirable that the tension is adjusted to an extent of extending to 3 to 7%. Further, in the laminating section, there is a pressing method using a nip roll, or a pressing method using a sheet tension without using a nip roll. When the laminating section is an expander roll, a pressing method not using a nip roll is preferable. In the laminating section, either the paper passing method may be adopted regardless of whether the support side is removed or the film side is removed, and the angle held by the laminate roll at that time is not particularly limited.
【００１４】この様な方法により、ＭＤとＣＤの張力を
バランスさせ、表面平滑度が王研式で１０００秒以上、
及び前記測定法で測定されるカールの比が０．２〜５．
０の感熱孔版用原紙を得るのであるが、ＭＤまたは／及
びＣＤの張力が弱かった場合は、ラミネート後のフィル
ム面が、支持体表面の凹凸の影響を受け、感熱孔版用原
紙としての平滑度が１０００秒に達しなくなる。この時
にはサーマルヘッドとの密着が悪くなり、感度、画質が
劣る結果となる。また、ＭＤあるいはＣＤの張力バラン
スが相対的に大きく違っている場合は、感熱孔版用原紙
の平滑度としては１０００秒以上のものが得られるとき
もあるが、片方向のカールが強くなりすぎ、裁断時の取
扱性の低下、製版機への装着性の低下、及び特に全自動
印刷機においてジャムが起こる等の搬送性低下が見られ
る。片方向のみのカールが強くなった時にこのような問
題が起こるのであるが、これは片方向のみのカールだ
と、カールの原因である内部応力を抑制するような力が
働かず、その応力が無くなるまで自由にカールし、その
ため強いカールになる。本発明のようにＭＤとＣＤのカ
ールのバランスが良い場合には、実際はＭＤ、ＣＤに強
い内部応力（カール）が掛かっているのであるが、両者
で相殺しあい、見かけ上はそれ程大きなカールにならな
い。According to such a method, the MD and CD tensions are balanced, and the surface smoothness is 1000 seconds or more according to the Oken method.
And a curl ratio of 0.2 to 5.
A heat-sensitive stencil sheet of 0 is obtained. If the MD or / and CD tension is low, the film surface after lamination is affected by the unevenness of the surface of the support, and the smoothness as the heat-sensitive stencil sheet is obtained. Does not reach 1000 seconds. At this time, the adhesion with the thermal head becomes poor, resulting in poor sensitivity and image quality. Further, when the tension balance of MD or CD is relatively largely different, the smoothness of the heat-sensitive stencil sheet may be 1000 seconds or more, but the curl in one direction becomes too strong. A reduction in handling at the time of cutting, a reduction in mountability to a plate making machine, and a reduction in transportability such as occurrence of a jam in a fully automatic printing machine are observed. Such a problem occurs when the curl in only one direction becomes strong.However, in the case of curl in only one direction, the force that suppresses the internal stress that causes the curl does not work, and the stress is reduced. It curls freely until it disappears, so it has a strong curl. When the curl of the MD and the CD is well-balanced as in the present invention, a strong internal stress (curl) is actually applied to the MD and the CD, but the two cancel each other out, and the curl is not so large apparently. .
【００１５】本発明の感熱孔版用原紙は、この様な方法
により製造されるのであるが、必要に応じて帯電防止
剤、スティック防止剤等のオーバーコート層、あるいは
水分調整のための加湿等がなされても良い。The heat-sensitive stencil sheet of the present invention is produced by such a method, and if necessary, an overcoat layer such as an antistatic agent and an anti-stick agent, or a humidifier for adjusting moisture is used. May be done.
【００１６】[0016]
【実施例】以下に本発明を実施例により詳細に説明する
が、本発明はこれらの実施例に限定されるものではな
い。尚、実施例における評価方法は以下の方法による。 １）カール 前記した測定法に準ずる。 ２）画質 サーマルヘッドの１ドットあたりの製版エネルギーを可
変できる画像試験機（株式会社大倉電機製：サーマルヘ
ッド印字装置ＴＨ−ＰＭＤ）にて、感熱孔版用原紙を製
版した後、感熱孔版用印刷機（理想化学工業（株）製リ
ソグラフＡＰ７２００）にて印刷スピード１００枚／分
で印刷し、１００枚めの印刷物について画質のきめ細か
さを調べ、実用上問題無いきめ細かい画質が得られた製
版エネルギーを、各感熱孔版用原紙の最低製版エネルギ
ーとして評価した。 ３）搬送性 感熱孔版原紙をデジタル穿孔方式の自動製版印刷機
（（株）リコー製プリポートＳＳ８６０）にて１００版
製版（各５００枚／１版印刷）を行ないその搬送不良率
（式２参照）を調べた。EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. In addition, the evaluation method in an Example is based on the following method. 1) Curl According to the measurement method described above. 2) Image quality After making a stencil sheet for heat-sensitive stencil using an image tester (manufactured by Okura Electric Co., Ltd .: Thermal head printer TH-PMD) that can vary the stencil energy per dot of the thermal head, the stencil printing machine is used. (Risograf AP7200 manufactured by Riso Chemical Industry Co., Ltd.), printing was performed at a printing speed of 100 sheets / min, and the fineness of the image quality of the 100th printed matter was examined. It was evaluated as the minimum plate making energy of each heat sensitive stencil sheet. 3) Conveyability The heat-sensitive stencil sheet is subjected to 100-plate stencil printing (500 sheets / one-plate printing) by a digital perforation type automatic stencil printing machine (Ricoh Preport SS860). Was examined.
【００１７】[0017]
【式２】 (Equation 2)
【００１８】実施例１ 厚さ２μの２軸延伸ポリエステルフィルムの片面に、ト
ルエンに溶解した塩化ビニルー酢酸ビニル共重合体樹脂
（サイビノールＬＧ−Ｌ３、サイデン化学（株）製）を
乾燥後約０．９ｇ／ｍ2 となるようにロールコーターで
塗布した後、この塗布面と反対面を連続的に回転駆動し
ているエキスパンダーロールに接触させ、その直後に、
１２ｇ／ｍ2 のマニラ麻１００％の多孔性支持体と貼り
合わせた。次いでこの、フィルムと多孔性支持体からな
る積層体のフィルム面にシリコーンオイルエマルジョン
（トーレダウコーニング・シリコーン（株）製、ＳＭ−
８７０１）を乾燥後約０．２ｇ／ｍ2 となるように塗布
し感熱孔版用原紙を作製した。ここで得られた感熱孔版
用原紙の王研式平滑度は４８００秒、カールの比は０．
７３であり、実際に製版印刷した結果、０．１２５ｍＪ
／ｄｏｔまできめ細かな画質が得られ搬送性も良好であ
った。結果を表１に示す。Example 1 A vinyl chloride-vinyl acetate copolymer resin (Sibinol LG-L3, manufactured by Seiden Chemical Co., Ltd.) dissolved in toluene was dried on one surface of a biaxially stretched polyester film having a thickness of 2 μm to a thickness of about 0.1 μm. After applying with a roll coater so as to be 9 g / m 2 , the surface opposite to the applied surface is brought into contact with an expander roll that is continuously rotating and driven, and immediately thereafter,
It was bonded to a 12 g / m 2 100% Manila hemp porous support. Next, a silicone oil emulsion (manufactured by Toray Dow Corning Silicone Co., Ltd., SM-) was applied to the film surface of the laminate comprising the film and the porous support.
8701) was dried and applied so as to be about 0.2 g / m 2 to prepare a heat-sensitive stencil sheet. The Oken-type smoothness of the heat-sensitive stencil sheet obtained here was 4,800 seconds, and the curl ratio was 0.1.
73, which was 0.125 mJ as a result of actual plate making printing.
The fine image quality was obtained up to / dot, and the transportability was also good. Table 1 shows the results.
【００１９】[0019]
【表１】 [Table 1]
【００２０】実施例２ 厚さ１．５μの低融点２軸延伸ポリエステル系フィルム
の片面に、トルエン７５部、酢酸エチル２５部の溶剤に
溶解した飽和ポリエステル樹脂（ボンドＫＶ−３５、コ
ニシ（株）製）を乾燥後約１．５ｇ／ｍ2 となるように
ロールコーターで塗布した後、この塗布面と反対面を曲
率を持った弓バーに接触させ、その直後に、マニラ麻８
０％・ポリエステル繊維２０％からなる多孔性支持体と
貼り合わせた。次いで、このフィルムと多孔性支持体か
らなる積層体のフィルム面に実施例１で用いたシリコー
ンオイルエマルジョンを乾燥後約０．２ｇ／ｍ2 となる
ように塗布し感熱孔版用原紙を作製した。ここで得られ
た感熱孔版用原紙の王研式平滑度は、２０００秒，カー
ルの比は０．４２であり、実際に製版印刷した結果、
０．０９ｍＪ／ｄｏｔまできめ細かな画質が得られ搬送
性も良好であった。結果を表１に示す。Example 2 A low-melting point biaxially stretched polyester film having a thickness of 1.5 μm was coated on one side with a saturated polyester resin (Bond KV-35, Konishi Co., Ltd.) dissolved in a solvent containing 75 parts of toluene and 25 parts of ethyl acetate. Was dried and applied with a roll coater to a weight of about 1.5 g / m 2, and the surface opposite to the applied surface was brought into contact with a bow bar having a curvature.
It was bonded to a porous support composed of 0% and 20% polyester fiber. Next, the silicone oil emulsion used in Example 1 was applied to the film surface of the laminate comprising the film and the porous support so as to have a concentration of about 0.2 g / m 2 after drying to prepare a heat-sensitive stencil sheet. The obtained stencil sheet for heat-sensitive stencils had an Oken-type smoothness of 2000 seconds and a curl ratio of 0.42.
Fine image quality was obtained up to 0.09 mJ / dot, and the transportability was also good. Table 1 shows the results.
【００２１】実施例３ 厚さ２．０μの低晶質低融点高収縮性の高感度２軸延伸
ポリエステル系フィルムの片面に、メタノールに溶解し
た酢酸ビニル樹脂（セビアンＡー７１２、ダイセル化学
工業（株）製）を乾燥後約１．２ｇ／ｍ2 となるように
ロールコーターで塗布した後、この塗布面と反対面をフ
ラットエキスパンダーロールに接触させ、このロール上
にて同時にマニラ麻８０％・ポリエステル繊維２０％か
らなる多孔性支持体と貼り合わせた。次いで、このフィ
ルムと多孔性支持体からなる積層体のフィルム面にイソ
プロピレンアルコールに溶解したシリコーンオイル（ト
ーレダウコーニング・シリコーン（株）製、ＳＦ−８４
２１）を乾燥後約０．２ｇ／ｍ2 となるように塗布し感
熱孔版用原紙を作製した。ここで得られた感熱孔版用原
紙の王研式平滑度は３８００秒、カールの比は２．８２
であり、実際に、製版印刷した結果、０．０６５ｍＪ／
ｄｏｔまできめ細かな画質が得られ搬送性も良好であっ
た。結果を表１に示す。Example 3 A low-crystalline, low-melting, high-shrink, high-sensitivity biaxially stretched polyester film having a thickness of 2.0 μm was coated on one surface with a vinyl acetate resin dissolved in methanol (Sebian A-712, Daicel Chemical Industries, Ltd.). Co., Ltd.) was dried and applied with a roll coater so as to have a weight of about 1.2 g / m 2, and the surface opposite to the coated surface was brought into contact with a flat expander roll. It was bonded to a porous support consisting of 20% of fibers. Then, a silicone oil dissolved in isopropylene alcohol (manufactured by Toray Dow Corning Silicone Co., Ltd., SF-84) was applied to the film surface of the laminate comprising the film and the porous support.
21) was dried and applied so as to be about 0.2 g / m 2 to prepare a heat-sensitive stencil sheet. The Oken-type smoothness of the heat-sensitive stencil sheet thus obtained was 3,800 seconds, and the curl ratio was 2.82.
As a result of plate making printing, 0.065 mJ /
Dot and fine image quality were obtained, and transportability was also good. Table 1 shows the results.
【００２２】実施例４ 厚さ２．０μの低晶質低融点高収縮性の高感度２軸延伸
ポリエステル系フィルムの片面に、メタノールに溶解し
た酢酸ビニル樹脂を乾燥後約１．２ｇ／ｍ2 となるよう
にロールコーターで塗布した後、この塗布面と反対面を
フラットエキスパンダーロールに接触させ、ガイドロー
ル１本を経てマニラ麻８０％・ポリエステル繊維２０％
からなる多孔性支持体と貼り合わせた。次いでこの、フ
ィルムと多孔性支持体からなる積層体のフィルム面にイ
ソプロピレンアルコールに溶解したシリコーンオイルを
乾燥後約０．２ｇ／ｍ2 となるように塗布し感熱孔版用
原紙を作製した。ここで得られた感熱孔版用原紙の王研
式平滑度は１２００秒、カールの比は０．２４であり、
実際に製版印刷した結果、０．０９ｍＪ／ｄｏｔまでき
め細かな画質が得られ搬送性も良好であった。結果を表
１に示す。Example 4 A low-crystalline, low-melting, high-shrink, highly sensitive biaxially stretched polyester film having a thickness of 2.0 μm was dried on one side with a vinyl acetate resin dissolved in methanol, and dried to about 1.2 g / m 2. After applying with a roll coater, the opposite side to this application surface was brought into contact with a flat expander roll, and passed through one guide roll, 80% of Manila hemp and 20% of polyester fiber
And a porous support consisting of Next, a silicone oil dissolved in isopropylene alcohol was applied to the film surface of the laminate comprising the film and the porous support so as to have a concentration of about 0.2 g / m 2 after drying to prepare a heat-sensitive stencil sheet. The Oken-type smoothness of the heat-sensitive stencil sheet obtained here was 1200 seconds, the curl ratio was 0.24,
As a result of actual plate-making printing, fine image quality down to 0.09 mJ / dot was obtained, and transportability was also good. Table 1 shows the results.
【００２３】比較例１ 実施例１で用いたエキスパンダーロールをとり外した以
外は全て実施例１と同じ方法にて感熱孔版用原紙を得
た。ここで得られた感熱孔版用原紙の王研式平滑度は、
８８０秒、カールの比は０．１８であり、実際に製版印
刷した結果、０．１２５ｍＪ／ｄｏｔにおいても白抜け
状の斑点が目だち、がさついた画質であった。また、若
干搬送不良も生じた。結果を表１に示す。Comparative Example 1 A heat sensitive stencil sheet was obtained in the same manner as in Example 1 except that the expander roll used in Example 1 was removed. The Oken type smoothness of the heat-sensitive stencil sheet obtained here is
At 880 seconds, the curl ratio was 0.18. As a result of actual plate making printing, white spots were noticeable even at 0.125 mJ / dot, and the image quality was rough. In addition, some transport failures occurred. Table 1 shows the results.
【００２４】比較例２ 実施例２で用いた弓バーをとり外した以外は全て実施例
２と同じ方法にて感熱孔版用原紙を得た。ここで得られ
た感熱孔版用原紙の王研式平滑度は、７２０秒、カール
の比は０．１６であり、実際に製版印刷した結果、０．
１２５ｍＪ／ｄｏｔにおいても白抜け上の斑点が目だ
ち、がさついた画質であった。また、製版中搬送不良が
生じた。結果を表１に示す。Comparative Example 2 A heat-sensitive stencil sheet was obtained in the same manner as in Example 2 except that the bow bar used in Example 2 was removed. The Oken-type smoothness of the heat-sensitive stencil sheet thus obtained was 720 seconds, and the curl ratio was 0.16.
Even at 125 mJ / dot, spots on white spots were noticeable, and the image quality was rough. In addition, conveyance failure occurred during plate making. Table 1 shows the results.
【００２５】比較例３ 実施例３で用いたフラットエキスパンダーロールをとり
外した以外は全て実施例３と同じ方法にて感熱孔版用原
紙を得た。ここで得られた感熱孔版用原紙の王研式平滑
度は５２０秒、カールの比は０．０８であり、実際に製
版印刷した結果、０．１２５ｍＪ／ｄｏｔにおいても白
抜け上の斑点が目だち、がさついた画質であった。ま
た、製版中搬送不良が生じた。結果を表１に示す。Comparative Example 3 A heat sensitive stencil sheet was obtained in the same manner as in Example 3 except that the flat expander roll used in Example 3 was removed. The heat-sensitive stencil sheet thus obtained had an Oken-type smoothness of 520 seconds and a curl ratio of 0.08. As a result of actual plate-making printing, spots on white spots were observed even at 0.125 mJ / dot. The image quality was rough. In addition, conveyance failure occurred during plate making. Table 1 shows the results.
【００２６】比較例４ ニップロールの差速を大きくしフィルムにかかる張力を
最大限強くした以外は比較例２と全く同じ方法で感熱孔
版用原紙を得た。ここで得られた感熱孔版用原紙の王研
式平滑度は１０３０秒、カールの比は０．０２であり、
実際に製版印刷した結果、０．０９ｍＪ／ｄｏｔまでき
め細やかな画質が得られた。しかしながら、製版時、印
刷時の搬送不良が多く、ＭＤ方向カールが強いため取扱
性も非常に悪かった。結果を表１に示す。Comparative Example 4 A heat-sensitive stencil sheet was obtained in exactly the same manner as in Comparative Example 2, except that the differential speed of the nip rolls was increased and the tension applied to the film was maximized. The Oken-type smoothness of the heat-sensitive stencil sheet obtained here was 1030 seconds, and the curl ratio was 0.02.
As a result of actual plate-making printing, a fine image quality of 0.09 mJ / dot was obtained. However, there were many conveyance failures during plate making and printing, and the curl in the MD was strong, so that the handleability was very poor. Table 1 shows the results.
【００２７】比較例５ ニップロールの差速を利用しフィルムにかかる張力を最
小限弱くした他は比較例２と全く同じ方法で感熱孔版用
原紙を得た。ここで得られた感熱孔版用原紙の王研式平
滑度は４８０秒、カールの比は０．２７であり、実際に
製版印刷した結果、搬送性は問題無かったが０．１２５
ｍＪ／ｄｏｔにおいても白抜け状の斑点がめだち、がさ
ついた画質であった。結果を表１に示す。Comparative Example 5 A heat-sensitive stencil sheet was obtained in exactly the same manner as in Comparative Example 2, except that the tension applied to the film was reduced to a minimum by utilizing the speed difference between the nip rolls. The heat-sensitive stencil sheet thus obtained had an Oken-type smoothness of 480 seconds and a curl ratio of 0.27. As a result of actual plate-making printing, there was no problem with transportability, but 0.125.
Even at mJ / dot, white spots were noticeable and the image quality was rough. Table 1 shows the results.
【００２８】[0028]
【発明の効果】本発明方法により得られた感熱孔版用原
紙は、表面平滑性が高いため、サーマルヘッドとの密着
が良好となり、高感度、高画質であり、また、極端な片
方向のみのカールが無いため取扱性が良好であり、製版
時の搬送性も良好である。The heat-sensitive stencil sheet obtained by the method of the present invention has a high surface smoothness, so that it has good adhesion to the thermal head, has high sensitivity and high image quality, and has only one extreme direction. Since there is no curl, handleability is good, and transportability during plate making is also good.
【図１】本発明におけるカール測定の概図である。FIG. 1 is a schematic diagram of curl measurement in the present invention.
ａ，ｃ ＭＤの測定点 ｂ，ｄ ＣＤの測定点 a, c Measurement point of MD b, d Measurement point of CD
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B41N 1/24 102 B41C 1/055 511 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) B41N 1/24 102 B41C 1/055 511
Claims (2)
部で、多孔質支持体及び／又は熱可塑性フィルムを、流
れ方向と幅方向に張った状態で、多孔質支持体上に熱可
塑性フィルムを積層してなる感熱孔版用原紙であって、
熱可塑性フィルム側表面の王研式平滑度が１０００秒以
上であり、下記測定法で測定される幅方向と流れ方向と
のカール比が０．２〜５．０であることを特徴とする感
熱孔版用原紙。 測定法：感熱孔版用原紙を平坦な面の上に置き、この感
熱孔版用原紙の流れ方向に平行な１０ｃｍの直線を一辺
とする正方形の対角線上に切込みを入れる。切込みの入
った感熱孔版用原紙は、流れ方向、幅方向のカールの強
さにより、図１の様に変化する。このカールの強さを、
図１の流れ方向のａ点とｃ点間の長さ、及び幅方向のｂ
点とｄ点間の長さとし、流れ方向と幅方向のカールの比
を式１より求める。 【図１】 【式１】 1. A thermoplastic film is laminated on a porous support in a state where the porous support and / or the thermoplastic film is stretched in a flow direction and a width direction at a laminating part and / or a part before and after lamination. Heat-sensitive stencil base paper,
Oken type smoothness of the thermoplastic film side surface is 1000 seconds or more, and the curl ratio between the width direction and the flow direction measured by the following measurement method is 0.2 to 5.0. Stencil paper. Measurement method: A heat sensitive stencil sheet is placed on a flat surface, and a cut is made on a diagonal line of a square having a straight line of 10 cm parallel to the flow direction of the heat sensitive stencil sheet. The heat-sensitive stencil sheet with a cut changes as shown in FIG. 1 depending on the curl strength in the flow direction and the width direction. The strength of this curl
The length between points a and c in the flow direction in FIG. 1 and b in the width direction
Using the length between the point and the point d, the ratio of the curl in the flow direction and the curl in the width direction is obtained from Expression 1. FIG. (Equation 1)
してなり、熱可塑性フィルム側表面の王研式平滑度が１
０００秒以上であり、下記測定法で測定される幅方向と
流れ方向とのカール比が０．２〜５．０である感熱孔版
用原紙の製造方法であって、多孔質支持体上に熱可塑性
フィルムを積層するに際し、ラミネート部及び／又はラ
ミネート前後部で、多孔質支持体及び／又は熱可塑性フ
ィルムを、流れ方向と幅方向に張った状態でラミネート
することを特徴とする感熱孔版用原紙の製造方法。 測定法：感熱孔版用原紙を平坦な面の上に置き、この感
熱孔版用原紙の流れ方向に平行な１０ｃｍの直線を一辺
とする正方形の対角線上に切込みを入れる。切込みの入
った感熱孔版用原紙は、流れ方向、幅方向のカールの強
さにより、図１の様に変化する。このカールの強さを、
図１の流れ方向のａ点とｃ点間の長さ、及び幅方向のｂ
点とｄ点間の長さとし、流れ方向と幅方向のカールの比
を式１より求める。 【図１】 【式１】 2. A laminate comprising a porous support and a thermoplastic film, wherein the surface of the thermoplastic film has an Oken-type smoothness of 1
2,000 seconds or more, and a curl ratio between the width direction and the flow direction measured by the following measurement method is 0.2 to 5.0. In laminating a plastic film, a heat-sensitive stencil sheet is characterized in that a porous support and / or a thermoplastic film are laminated in a laminating part and / or a part before and after lamination in a state of stretching in a flow direction and a width direction. Manufacturing method. Measuring method: A heat sensitive stencil sheet is placed on a flat surface, and a cut is made on a diagonal of a square having a straight line of 10 cm parallel to the flow direction of the heat sensitive stencil sheet. The heat-sensitive stencil sheet with a cut changes as shown in FIG. 1 depending on the curl strength in the flow direction and the width direction. The strength of this curl
The length between points a and c in the flow direction in FIG. 1 and b in the width direction
Using the length between the point and the point d, the ratio of the curl in the flow direction and the curl in the width direction is obtained from Expression 1. FIG. (Equation 1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04764892A JP3202304B2 (en) | 1992-02-04 | 1992-02-04 | Base paper for heat sensitive stencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04764892A JP3202304B2 (en) | 1992-02-04 | 1992-02-04 | Base paper for heat sensitive stencil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05212983A JPH05212983A (en) | 1993-08-24 |
| JP3202304B2 true JP3202304B2 (en) | 2001-08-27 |
Family
ID=12781072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04764892A Expired - Lifetime JP3202304B2 (en) | 1992-02-04 | 1992-02-04 | Base paper for heat sensitive stencil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3202304B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3632056B2 (en) * | 1997-07-10 | 2005-03-23 | 株式会社リコー | Master for thermal stencil printing and its plate making method |
| GB2327129B (en) * | 1997-07-10 | 2000-11-08 | Ricoh Kk | Heat-sensitive stencil,process of fabricating same and method of producing printing master using same |
-
1992
- 1992-02-04 JP JP04764892A patent/JP3202304B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05212983A (en) | 1993-08-24 |
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