JPS6129594A - Thermal sclean printing method - Google Patents

Abstract

PURPOSE:To realize almost blot-free printing through a normally rotating image perforated using a thermal head by impregnating in water- and oil-repellant material a porous support of thermal sclean paper consisting of thermoplastic resin film and porous support stuck together. CONSTITUTION:Thermal sclean paper is composed of a thermoplastic resin film (polyester, etc.), a porous support and an adhesive sticking the film and the support together. Natural fiber, chemical fiber, etc. are used as the porous support. This support is treated by impregnating a water- and oil-repellant material e.g. fluorine activator, wax, metallic soap. The throughput should be 10g or less of water- and oil-repellant material per one square meter of support. The support and thermoplastic film thus treated are to be stuck together with an adhesive and further a parting agent to be applied for preventing the adhesion of a heating element and a film surface through fusion. Then a normally rotating perforated image is formed in a thermal printer and the support contacts printing paper for printing.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention perforates heat-sensitive stencil paper with a thermal head to form a normal rotation perforation image, and finally obtains a normal rotation image printed matter with less bleeding. The present invention relates to a thermal stencil printing method.

(Prior art) Conventionally, the method of making a heat-sensitive stencil paper is to use an infrared lamp or a xenon flash tube to apply a heat-sensitive stencil paper onto a manuscript that has been printed or written with a heat-absorbing colorant such as carbon black. It was a method in which light was irradiated through heat-sensitive stencil paper that was placed in close contact with the original, and the heat absorbed by the printed area on the document melted and perforated the film of the heat-sensitive stencil paper. , the development of so-called word processors was remarkable.

Complex processing such as 9 kanji figures can now be easily performed as printer output.

(Problems to be Solved by the Invention) -However, when making multiple copies using the above method, the following steps are required: create a manuscript with a word processor → make plates on heat-sensitive stencil paper with a plate-making machine → print with a printing machine. Three types of machines were required: a plate-making machine and a printing machine.

Therefore, the inventor of the present invention has studied various ways to simplify the above method and efficiently make multiple copies from a word processor manuscript, and has found that if a thermal printer is used as the word processor and thermal stencil paper is used as the original paper, it will be possible to create a special They discovered that heat-sensitive stencil paper could be made without a suitable plate-making machine, and they applied a one-dimensional array of heating elements directly to the thermoplastic resin film side of a heat-sensitive stencil paper made by laminating a thermoplastic resin film and a porous support. A heat-sensitive stencil, characterized in that the heating elements are moved perpendicularly to the arrangement direction and a pulse-modulated current is applied to the heating elements to form two-dimensional dot matrix-like perforations on the surface of the thermoplastic resin film. We proposed a method for producing base paper. (Japanese Patent Application No. 59-79020) However, when perforating characters from the film side, ink must be supplied from the film side in order to print the characters as seen from the film side (normally rotated image). Thermal printers required circuitry to reverse the perforation pattern to obtain reversed characters from the film side, ie, reversed characters (reversed images).

(Means for Solving the Problem) Therefore, the present inventor proposed a method that does not require a circuit for perforating a reverse image in a thermal printer. We focused on supplying ink to the body for printing. However, since the present invention uses a thermal printer, the film thickness of the thermoplastic resin film must be 5μ or less in order to improve its perforation.In this case, since the thermoplastic resin film is thin, Ease of use when printing.

A porous film support is essential from the viewpoint of durability during printing. However, when printing by supplying ink from the support force to the film side through the holes in the film with the reverse image perforated as in the past, the film comes into contact with the printing paper, whereas the film with the normal image perforated Since ink is supplied from the film side to the support through the holes in the ilm for printing, the support inevitably comes into direct contact with the printing paper, resulting in problems such as smudging of the printed matter. The inventors of the present invention have discovered that by treating the porous film support with a water- and oil-repellent substance, printed matter with less bleeding can be obtained.

This completes the present invention.

That is, two aspects of the present invention are: a heat-sensitive stencil paper made by laminating a thermoplastic resin film and a porous film support; a thermal hept that slides in contact with the thermoplastic resin film of the heat-sensitive stencil paper; and the selection of the thermal head. The thermoplastic resin film is perforated by heating the heating element.

In the thermosensitive stencil printing method in which ink is supplied from the film side to the support through perforations formed in the thermoplastic film for printing, the porous film support is coated with a fluorine-based activator, wax, metal soap, etc. Impregnated with water and oil repellent substances.

The gist of this is a heat-sensitive stencil printing method in which the processing amount is a porous film support in which the amount of water-repellent/oil-repellent substance per square meter of porous support is 10 g or less. (Structure of the Invention) The present invention will be explained in detail below.

The main components of the base paper used in the present invention are a thermoplastic resin film, a porous film support, and both.

It consists of an adhesive to bond the parts together, and a release agent to prevent the thermoplastic resin film from fusing with the thermal head.

As the thermoplastic resin film, a film made of thermoplastic resin such as a polyester resin film can be used.

2. In the present invention, since the holes are perforated by a thermal head, the film thickness is 5 μm or less, preferably 2 μm or less.

As a porous film support, this is it.

Natural fibers such as honeysuckle, Manila hemp, and rayon.

Thin paper manufactured by mixing chemical fibers such as vinylon and polyester with natural fibers, and furthermore, those thin papers treated with water resistance with resin such as viscose can be used.

The method of bonding a thermoplastic resin film and a porous film support is to apply an adhesive such as vinyl acetate, vinyl chloride, synthetic rubber, natural rubber, or ester to the thermoplastic resin film or porous film support. A method of attaching the paste by applying it to the body, and Japanese Patent Application Laid-Open No. 58-188
There is a bonding method using gravure printing as in No. 696, and a bonding method in which a porous film support is impregnated with a synthetic resin liquid as in Japanese Patent Publication No. 55-47997.

Fatty acids such as stearic acid and oleic acid or metal salts thereof are added to the film side of the heat-sensitive stencil paper obtained by such a bonding method in order to prevent fusion between the plate-making special heating element and the film surface. It is also possible to apply various known release agents such as silicone resin or the like.

Next, we will talk about the essential impregnation treatment for the porous film support.The above-mentioned porous film support is impregnated with a water- and oil-repellent substance such as a fluorine-based activator, wax, or metal soap. From the viewpoint of operability, this treatment is preferably carried out after the thermoplastic resin film and porous film support are bonded together, and the amount of treatment is as follows.

The amount of water/oil repellent substance per square meter of porous film support must be 10 g or less. 10g/I1
If it is more than 1", the network structure of the porous film support will be crushed, which will impede the perforation. Also, the reason why the impregnation treatment can prevent printed matter from bleeding is that the porous The fiber surface of the film/support is coated with a water-repellent/oil-repellent substance, which reduces the affinity of the ink to the fiber surface, resulting in the ink penetrating along the fiber surface and diffusing outside the perforating tool. It is thought that this prevents the so-called bleeding phenomenon.

Next, the thermal stencil printing method of the present invention will be described.

First, the above-mentioned heat-sensitive stencil paper is plate-made as it is using a normal thermal printer (one that outputs normal rotation images) to create a normal rotation perforation image. In other words, heat-sensitive stencil paper is set so that the porous film support is in contact with the printing paper, and normal printing is performed. That is.

With this setting, during printing, the ink passes from the thermoplastic resin film side to the porous film support side, so that the printed matter becomes a normally rotated image.

Although the above printing method has been explained using a rotary press, the same method can also be applied to a printing press that does not use a rotary press. It is sufficient to print so that the ink passes through.

(Example) Hereinafter, the present invention will be described in further detail based on nine examples.

<Preparation of heat-sensitive stencil paper> A polyester resin film (film thickness: 1.5μ, product name: Enplet, manufacturer: Unitika Co., Ltd.) was used as the thermoplastic resin film, and it is generally used as a porous film support for stencil masters. Japanese paper (weighing: 11.0g 7m", manufactured by Nihon Shigyo Co., Ltd.) was used.

As an adhesive, 2 pieces of vinyl acetate resin adhesive (product name: Vinyroll 5E-H, manufacturer: Showa Kobunshi Co., Ltd.) were used.
- Diluted with butanone and adjusted to 10% solids.

- As for the bonding method, Japanese paper was layered on the above film, adhesive was applied from the Japanese paper side with a rubber roll, and the film was left to dry at room temperature.

On the film side of the above Japanese paper and film polymer.

A release agent prepared by heating and dissolving a 1:1 mixture of stearic acid and sodium stearate in ethanol and adjusting the solid content to 7% was applied with a rubber roll to obtain a heat-sensitive stencil paper.

<Preparation of Samples> Cloth, leave at room temperature, and dry Samples 1~ <Table 1> Example 1 Using the above Sample 1 as a heat-sensitive stencil paper, plate making and printing were carried out as described below to obtain printed matter of normal rotation images. Obtained.

<Plate-making method> Plate-making was performed using a document making machine (product name: Reta Φ-con, manufacturer: Bentel Co., Ltd.) using a normal method (normal rotation image output) to create a normal rotation perforation image.

<Printing method> As a printing machine, a rotary copying machine (product name: Duplomate M
-760. Manufacturer: Duplo Co., Ltd.) was used, and rotary copying machine ink (manufacturer: Ni Megami Ink Industry Co., Ltd.) was used as the ink. The printing method is similar to the ballpoint pen base paper or mimeograph base paper conventionally used for mimeograph machines, and the wrapping is printed so that the thermoplastic resin film surface is in contact with the ink drum of the mimeograph machine. I obtained the printed matter.

Examples 2 and 3 Normally rotated printed matter was obtained in the same manner as in Example 1, except that Samples 2 and 3 were used as heat-sensitive stencil paper.

Comparative Examples 1 and 2.3 Printed images of normal rotation images were obtained in the same manner as in Example 1, except that Samples 4 and 5°6 were used as heat-sensitive stencil sheets.

Above are Examples 1 to 6. The evaluation of the printing condition of the printed matter obtained in Comparative Examples 1 to 3 is shown in Table 2.〇Table 2〉 (Effects of the Invention) As described above, the thermal stencil printing method of the present invention can be applied to ordinary thermal printers ( This is an excellent product that allows you to easily obtain clear printed matter with little bleeding by using a printer (transfer output) and a printing machine.

Claims (1)

[Claims] A heat-sensitive stencil paper in which a thermoplastic resin film and a porous film support are bonded together, a thermal head that slides in contact with the thermoplastic resin film of the heat-sensitive stencil paper, and a selected heating element of the thermal head. A thermosensitive stencil printing method comprising a means for perforating the thermoplastic resin film by heating, and printing by supplying ink from the film side to the support through the perforations formed in the thermoplastic film,
The porous film support is impregnated with a water- and oil-repellent substance such as a fluorine-based activator, wax, and metal soap, and the amount of treatment is the amount of the water- and oil-repellent substance per square meter of the porous support. 1. A method for thermal stencil printing, characterized in that the porous film support has a weight of 10 g or less.