JPS5933197A - Improved heat-sensitive stencil paper - Google Patents

Abstract

PURPOSE:To provide the titled stencil paper for flash stencil-making process which is excellent in perforatability and resolution of printed matter, by a method wherein a porous tissue paper comprised mainly of thermoplastic synthetic fibers having a specified melt-cutting temperature is used as a base, and a thermoplastic film is adhered thereto. CONSTITUTION:Not less than 80% of thermoplastic synthetic fibers (preferably polyester base fibers) having a single yawn finness of not larger than 3 denier, preferably 0.5-1.5 denior, a length of 1-5mm. and a melt-cutting temperature of 125-260 deg.C are formed into a paper, together with natural cellulosic fibers if required, and the paper is heated for several seconds by heating rolls of preferably rolls of preferably 80-180 deg.C to obtain a porous tissue paper, which is used as a base. The thermoplastic film (e.g., a vinylidene chloride resin, PVC, PS) is adhered to the base by heat or an adhesive to obtain the objective stencil paper. EFFECT:Excellent in tensile strength and durability in printing.

Description

[Detailed Description of the Invention] The present invention. is a heat-sensitive stencil. For printing. This is related to the improvement of base paper, and in detail, porous thin paper is used as a support and support, and thermoplastic plastic is applied to this. Khufu. Improving the perforation of thermal stencil printing base paper with a laminated film and the resolution of printed matter KpA. It is something that ．． ．．・1 Conventionally, the base paper for thermal stencil printing does not change with the perforation temperature of the film, and the printing temperature. N.K. ．． good". A permeable porous thin paper is used as a support, and this is a plastic made of a copolymer of K-polyvinylidene chloride and polyvinyl chloride. It is known that the film is laminated with a thermal adhesive.

This will be explained below with reference to FIG. A base carpet 4 is closely attached and laminated to the side of the plastic film 1 so that it can be easily peeled off, and the original 2 is sandwiched between the film and the base and passed to a plate-making machine. ′ What about a thermal plate making machine? A rod-shaped infrared lamp? The one using a xenon flash tube is J=general VIL==.
Is it high in a very short time? After irradiating “Intense Light Energy” Homare? How to use the flash of light: Is the method of irradiation better? ·but?
Got it? It will be done. ? ...?・? The perforation and filling of the original paper [is the original 1 and the fugilum side of the paper?
1.?・Close to manuscript 2? difference? Se J? When a light beam is irradiated from the side of the porous thin paper 3, the light beam that has passed through the base paper is ?1 is absorbed by the black image/image area of the manuscript, and ``m8c'' in that area suddenly rises and rises, making it appear that it is in close contact with the image.
Is heat conducted to your friend? What to do if the part is heated: shrinks: softens, melts? Melt? It is thought that the hole is drilled by

Traditional feeling? For hot stencil printing: Porous thin paper as a support for base paper.Paper is made of natural materials such as honeysuckle, Manila hemp, wood and wood pulp. Main raw materials: Accompanied by the above: In Mehara 1, film ``il''``n'' is made of finome that shrinks into a porous tissue paper that does not change due to heat during plate making.
The paper tends to smudge, making the perforations more likely to be uneven, and when printing on old paper, the characters on the printed matter may be cut off, resulting in an unsharpened image.

Solve this. with a support to determine. Porous tissue paper mixed with synthetic fibers or chemical fibers such as rayon, silk, nylon, polyester, etc. I like Esther and others. 40 to 300 mesh (preferably 80
Attempts have been made to use a screen of ~120 mesh), but this method has not been successful in reducing entanglement of heat-shrinkable films and improving ink permeability.
Even if effective, due to the use of an inherently heat resistant support, the fibers making up the support are not perforated during thermal plate making.

So the film is perforated faithfully to the original? ．． hand·
Also, the fibers that make up the support are ink. ．． Tooru. ! One step. Because it interferes with the print clarity? To? I couldn't improve it.

? In addition, there is a significant difference in Batani using Sukuo≠ji.・As stores increase, the low cost and cost advantages of stencil printing are diminished, and its uses are limited.

The present invention has focused on these problems, and has developed a material that maintains dimensional stability against Vr7.4 during plate making as a support for heat-sensitive stencil printing base paper. Do you have it? ．． One... By using porous thin paper, the constituent fibers are melted and cut at the same time as the perforation due to shrinkage of the thermoplastic film.
To provide base paper with excellent perforation and print resolution:
6L, that is, the base paper for thermal stencil printing of the present invention has a single yarn fineness of 3.0 denier or less and a melt cutting temperature of 125 to 26
It consists of 80 or more pieces of thermoplastic synthetic fiber of 0°0, and if necessary, it is mixed with natural cellulose fiber. It is characterized by being laminated by heat or adhesive.

Examples of raw material synthetic fibers suitable for making porous thin paper in the present invention include polyolefin fibers, divinyl chloride fibers, polyvinylidene chloride fibers, polyacrylic fibers, polyvinylalcohol fibers, and polyvinyl chloride fibers.
Simply select from thermoplastic synthetic fibers such as urethane fibers, polyamide fibers, and polyester fibers.
Can be used alone or in combination. ．．・Among these, does it maintain its dimensions and stability against heat during plate making? Melting and cutting of fibers. ．． Nyoru trousers. Improved porosity and less elongation during printing. Resolution burst.
In terms of obtaining excellent printed matter, polyester is preferred. The most important thing is when you focus on Good results can be obtained.

・．． ．． ．． ,・ ,． Synthesis used in the present invention. Nin's single thread weave/degree is 3
．． 0 denier or less, preferably 0.5 to 1.5 denier? The length is 20+m or less, preferably. C< is 1
~5 questions◇. In this way, it is a thin and short synthetic fiber. Ino. If the fibers used are thick and long, it will be difficult to form a homogeneous paper layer during paper making, and if the fibers are thick and long, it will be difficult to form a homogeneous paper layer. l? Combine? Is it because it is the same as the perforation of thermoplastic film that is melted and cut?
However, the perforation of the base paper becomes uneven, and the resolution of printed matter is improved. Have you achieved your goal of doing good? Is it “from”? The porous thin paper of the present invention has the above-mentioned heat resistance. Contains over 80% plastic synthetic fiber? I'll take a ride if necessary, okay? Mitsumata, Mani) Hemp,? By mixing wood with natural cells such as bulp and using normal paper making, it can be made into fiber-like or powdered binder. One? use? By doing: Ute Shozo?
・Zare? Ru. Jba at 1 o'clock? ·in? Can you effectively fuse goo? No way, Shirinoda? 1. In the hairdryer, add:
It's natural to feel excited, but Sho? After construction, as necessary. Response·
So, 80? ~18σ?゛0? By the heat roll? Every few seconds of heating? and heat resistance: dimensional stability and paper strength are further strengthened. Many of the above? In porous thin paper, 'Manila:' linen, wood paper? Do you use natural cellulose such as Lube? Ino mix? Sho? If the ratio exceeds 2°, melting and cutting of the synthetic fiber by heat is partially inhibited during plate making. Therefore, the perforation of the stencil printing base paper becomes non-uniform, and the resolution of the printed matter is therefore reduced.

In the present invention K. Plastic plastics: Kufi lume includes vinylidene chloride/beer chloride copolymer resin film, propylene/ethylene. Both. X-coupled resin film, ethylene vinyl acetate copolymer resin film, polypropylene resin film, polyhinyl chloride resin film,
Various conventionally proposed materials can be used, such as a polystyrene resin film.

In the present invention, the porous thin paper and the thermoplastic film are bonded together by thermocompression bonding or by using a vinyl acetate-based, acrylic-based, vinyl chloride-based adhesive, or the like.

The base paper for thermal stencil printing according to the present invention can be melted by heat.
Since the support is homogeneous porous tissue paper made of 80% or more of synthetic fiber that has the property of cutting, not only the thermoplastic film is perforated during plate making, but the porous tissue paper as the support is While it plays the role of maintaining the dimensional stability of the base paper against heat, the thermoplastic synthetic fibers that make up the paper are melted and cut by the heat, allowing for uniform perforation without being hindered by the fibers.・．． Therefore, when printing with a rotary copying machine, the ink passes through smoothly, the characters on the printed matter are not cut off, and the resolution is significantly improved.

In addition, in the stencil printing base paper of the present invention, the thermoplastic synthetic fibers are firmly bonded by the heat-sealing action of the binder, so it has strong resistance to tension and tension during printing, and is highly resistant. Printability is also improved.

The present invention will be described below with reference to Examples.〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇 [Example 1] Coniferous wood drifting raft pulp? (N=-BKP). Compared to 15% of those treated to a freeness of 30'SR, polyester for paper making. 85 pieces of mixed paper machine. By:, half tsubo 10.5f'
/Excerpt from Go. The manufactured 0 polyester fiber is... Porous thin paper thus obtained A base paper for heat-sensitive stencil printing was manufactured by laminating an 8 μm vinylidene chloride/vinyl chloride copolymer film to the paper using a vinyl acetate adhesive. This Hara? When the paper was made into plates using a flashlight irradiation plate making machine manufactured by Riso Kagaku Kogyo ■ (trade name: Xenofax), uniform perforations and clear records were obtained. When this paper was printed on a commercially available rotary mimeograph machine (Gestettner 460), it printed 1,500 sheets without any curling.
Stable and beautiful printed matter was obtained ◇ [Example 2] 85% polyester fiber for paper making was mixed with 15 pieces of Manila hemp treated to a degree of beatability of 30''llH.
◇The polyester fiber was made using a cylinder paper machine with a half tsubo of 10.5f/7n". ◇The polyester fiber is 70 parts K of 0.3 denier and 3 strips long, while the polyester fiber is 1.0 denier and 5 tsubos long. The binder fiber was used at a ratio of 15 parts.

Using the porous thin paper obtained by this 5KL process as a support,
The base paper for thermal stencil printing produced in the same manner as in Example 1 was plate-made and printed under the same conditions as in Example 1. As a result, the perforations were uniform, and even after printing 1,500 sheets, there was no tearing, resulting in a stable and beautiful paper. A print was obtained.

[Example 3] 85 parts of a 0.5 denier polyester fiber with a length of 5 mm and 15 parts of a 1 denier polyester binder fiber with a length of 5 fm were mixed and made into a half tsubo by a cylinder paper machine. LQ
．． The paper was made at 5f/711".

Using the porous thin paper obtained in this way as a support,
The base paper for thermal stencil printing produced in the same manner as in Example 1 was plate-made and printed under the same conditions as in Example 1. As a result, the plate was made uniformly! , Stable and beautiful printed matter was obtained without tearing even after printing 500 sheets. [Comparative Example 1] N-BKP treated to a beating degree of 30"SR 30'1
．． For 1.1%, 70 pieces of Borieskalu fiber (thickness, length and mixing ratio are the same as in Example 1) were mixed, and half a tsubo of 10.
Example 1 As a 6-kt holding body made at 5 f/go
The base paper for heat-sensitive stencil printing produced in the same manner as above was not melted or cut during plate making, so the perforations were uneven, and the images on the printed matter were unclear due to cut-off characters. Comparative example 2]? Mix 15 pieces of Manila hemp treated with 30% SRK and 85% polyester fiber to make 1 o. 5f/71
1".The polyester fibers were made with 70 parts of 6 denier and 1 orm length, and 70 parts of 1 denier and 1 orm length.
A mixture of 15 parts of binder fibers of 5 mm in diameter was used.

Using the porous thin paper obtained in this way as a support,
The base paper for thermal stencil printing produced in the same manner as in Example 1 was
Although it contains 85 pieces of thermoplastic synthetic fiber, most of the fibers are thick and are difficult to melt and cut when punching the film. Therefore, 1 perforation was performed evenly and 0? As a result, is the intoxication/object the place of comparative example 1? Is the letter bz in the J image cut off, with no big difference from the case? It was unclear.

4.・Brief explanation of the drawings 1.
i Figure 1 is a schematic diagram showing the composition of the base paper for thermal stencil printing and the position of Takakou's manuscript during platemaking. ◇ Explanation of the Era? 1.1.i.plasti? Kuffinolem 2...
...Manuscript 3...? Porous tissue paper 4...stand? Paper Patent Applicant Co., Ltd. Kenjin Procedural Amendments November 1981 1'7F+ Mr. Waka Kazuo Sugi, Commissioner of the Patent Office ■. Display of the incident. ．． 1981? Patent Application No. 1.48.4'85. 1?2
．． The name of the invention? ．．・・Improved. Base paper for thermal stencil printing. ．． 8. Persons who make updates.・ Address of patent applicant related to the case: Tokyo. Miyakominato-ku and 1-1 Bridge 1-chome, 1st edition name. Ko? Co., Ltd.?・Person n(′・ To Yoshi Kikuchi, Trustee, after 1.16; 4. Subject of amendment... ゝ'' . 5. Contents of the cuffs of the "Detailed Description of the Invention" in the Meikashi book) The description of Seiwa Rock is corrected as follows...(])Second
Page sugar line 8 [... it says 啼形...-1. of"
・・・． ...Stick-shaped..." I corrected it. '(2) Fifth
Tei No. 1 (line }: ``...Dimensions, stability...'' is corrected to ``...Dimensional stability...'').

(3) In the 5th line from the bottom of page 8, ``...drifting...'' is corrected to ``...bleaching...''.

(4) @2nd line from the bottom of page 8, 4th line from the bottom of page 9, line 12 and 1 of page 10] “Hankyo” in the 8th line of Sada
The text has been corrected as ``Yonetsubo'' (,7 is correct.

Claims (1)

[Claims] A porous thin paper is used as a support, and a thermoplastic plastic film is attached to the support. In the heat-sensitive stencil printing base paper K which is pasted together with an adhesive, the porous thin paper has a single yarn weave of 3.
Consists of 80% or more thermoplastic synthetic fiber with a denier of 0 denier or less and a melting/cutting temperature of 125-260'0. It is characterized by flash irradiation K and a feeling of being made more easily. Base paper for hot stencil printing.・