JPS61135793A - Screen printing material - Google Patents

Abstract

PURPOSE:To make it possible to extend the life of an ink ribbon without contaminating the same even if printing is applied, by densely mixing microcapsules capable of being ruptured by impact in a porous support and adhering the same by a binder. CONSTITUTION:A screen printing material 1 is constituted by densely mixing microcapsules 3 in a porous support 2 and adhering the same by a binder 4 and further lightly adhering the whole to base paper 5. By performing printing in such a state that the screen printing material 1 is mounted to a wire dot type impact printer along with base paper 5, a wire is allowed to impact the screen printing material. The capsules 3 at the impacted part is ruptured by said impact force to spring out the liquid sealed in said capsule. Therefore, the fiber of the part, which received the impact force of the wire, is exposed and brought to an ink permeable state. Thereafter, the screen printing material 1 and the base paper 5 are taken out and the screen printing material 1 is peeled off from the base paper 5 and mounted to a plate cylinder to perform printing. At this time, ink transmits through said printing material from the part where the fiber is exposed and is adhered to printing paper.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a stencil printing material suitable for use in relatively small quantity printing.

<Prior art> Sentences composed using a word processor are sometimes recorded and stored on paper by a printer, but are generally reproduced on several to several hundred pages and distributed to many people. There are many things.

The easiest way to make copies is to use an electronic copying machine, so-called copying.

The unit price per sheet is high, around 7 yen, and it is disadvantageous in terms of cost when duplicating several dozen sheets or more.

On the other hand, offset printing has the advantage that the cost per sheet is low when making large quantities of copies, but it takes a lot of time and effort to make the plates, and it also requires a lot of ink and dampening water. 9 It was difficult to handle because the hands got dirty easily.

Therefore, in recent years, methods and devices have been developed that can easily print a relatively small amount of printing on the order of tens to hundreds of sheets. One of them is Japanese paper.

This method uses a stencil printing base paper in which a porous support such as a nonwoven fabric is impregnated with wax. To make a plate using this base paper, the base paper and mount are lightly glued together and mounted on a wire-dot type impact printer, and by printing, the wire collides with the base paper to perforate or pierce the area. This removes the wax and allows the ink to pass through. At this time, the base paper is adhered to the mount, so it will not shift or wrinkle. Thereafter, the mount is peeled off and the base paper is mounted on the cylinder of a rotary copying machine, for example, to print a large number of sheets.

In the method of using stencil printing base paper, plate making is easy, and
There is an advantage that the unit price per sheet is low when printing in large quantities, and since plate making can be performed using a wire dot type impact printer, it is very suitable for printing sentences composed using a word processor.

<Problem 2 to be Solved by the Invention When printing is performed by attaching the above-mentioned stencil printing base paper to a wire dot type impact printer, it is inconvenient to remove it and it is difficult to visually confirm the printed content. For this reason, printing is generally performed without removing the ink ribbon.

There are two types of ink ribbon: those that are disposable after one use, and those made of cloth that are used repeatedly while being moved.When the latter is used in this way, wax from the base paper adheres to the ink ribbon However, since the ink ribbon is carried away, the surface of the ink ribbon becomes contaminated with wax and the ink quickly stops coming out.

This inconvenience can be avoided by removing the ink ribbon and printing on stencil paper, but when printing on plain paper, the ink ribbon must be attached, and it is time-consuming to remove the ink ribbon. This will require a lot of time. The present invention has been made in view of the current situation, and its purpose is to provide a stencil printing material that can extend the life of an ink ribbon without staining it even when printing is performed using an ink ribbon.

Means for Solving the Problems> The structure of the stencil printing material of the present invention that achieves the above object is that minute capsules that can be ruptured by impact are densely mixed in a porous support, and a binder is It is preferable that the capsule is filled with ink for confirmation.

Effect> Lightly adhere a mount to the back of the stencil printing material, attach it to a wire dot impact printer, and print, causing the wire to collide with the base paper. Part 1! [K] The capsule in that area ruptures, allowing the ink to pass through the porous support in that area. At this time, if printing is performed without removing the ink ribbon, the ink ribbon will be strongly pressed against the stencil printing material by the wire, but since there is no wax in the material,
There is no staining caused by wax, and there is no problem with ink flow.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

As shown in the drawing, the stencil printing material 1 of this embodiment is composed of a porous support 2, in which fine capsules 3 are closely mixed and adhered with a binder 4, and a mount is further attached. It is lightly glued to 5. The porous support 2 is a sheet or roll made of natural fibers such as kozo, mitsumata, manila hemp, and flax, and chemical fibers such as rayon-vinylon and polyester, either alone or mixed in an appropriate ratio. For example, Japanese paper, nonwoven fabric, etc. can be used. The capsules 3 are similar to those used in pressure sensitive paper and are easily ruptured by impact. As the wall material of the capsule 3, resins such as polyurea resin, polyamide resin, polyester resin, and polycarbonate resin, proteins, cellulose, etc. can be used, and the wall thickness is 10 mpm to 1 pm + preferably 50 mpm to 50 mpm.
Approximately 0 mpm is desirable.

The particle size of capsule 3 is 1 pm to 1001'rn.
+Preferably about 5 pm to 50 pm. The capsule 3 may be hollow, but since it is difficult to manufacture, it is preferably filled with an organic solvent or oil that dissolves in water at 5% or less. Examples of oils include phthalate esters and phosphate esters.

Especially when the ink is enclosed in the capsule 3.

There is an advantage that when printing is performed, ink jumps out from the capsule 3 and adheres to the porous support 2, so that the printed content can be visually confirmed. The capsules 3 may be mixed into the porous support 2 in one layer, two layers, or more layers as long as the capsules 3 are mixed densely enough to prevent ink from passing through. On the other hand, the binder 4 only needs to be able to fix the capsules 3 to the porous support 2, and for example, methylcellulose or the like can be used.

The stencil printing material 1 of this embodiment having the above structure is used in the following manner. First, the stencil printing material 1 and the mount 5 are mounted on a wire dot type impact printer to perform printing, thereby causing the wire to collide with the stencil printing material 1. The capsule 3 at the portion where the wire collided with it ruptures due to the impact, and the enclosed liquid etc. fly out. Therefore, the fibrous material is exposed in the area where the wire collided, and the ink can pass through. After that, the stencil printing material 1 and the mount 5 are taken out, and the stencil printing material 1 is peeled off from the mount 5.
It is attached to the plate cylinder and performs printing. At this time, the ink passes through the exposed portion of the fibers due to the collision of the wires and adheres to the printing paper. Furthermore, the mount referred to in the above embodiments is not particularly limited to paper, but refers to a base material that can hold a stencil printing material. Since the stencil printing material of the invention does not contain wax, when printing is performed using an ink ribbon with a wire dot impact printer, the ink ribbon will not be smudged by wax.

Therefore, even when the stencil printing material of the present invention and plain paper are used alternately in an impact printer, it is convenient because there is no inevitable need to remove the ink ribbon, and the life of the ink ribbon is shortened. There isn't.

[Brief explanation of drawings]

The drawing is a configuration diagram of a stencil printing material according to an embodiment of the present invention. In the drawing, 1 is a stencil printing material, and 2 is a porous support. 3 is a capsule. 4 is a binder, and 5 is a mount.

Claims (2)

[Claims] (1) A stencil printing material characterized in that microcapsules that can be ruptured by impact are closely mixed in a porous support and are attached with a binder. (2) A stencil printing material according to claim 1, wherein the capsule is filled with ink for confirmation.