SU941212A1 - Method of producing stencil printing plate - Google Patents

Description

This aim is achieved in that in the method of manufacturing a screen printing plate, comprising applying a pre-tensioned and obezzhipenIfyyu metal mesh photopolymer exposure image, its developability, filling the cell grid fusible alloy and removing remaining fotonolimera filling cells grid fusible alloy osun1, estvl before applying the laden mesh of the photopolymer, and after the image is developed, etching of the low-melting alloy in places without photopolymer is performed.

The drawing shows the sequence of operations of the method.

The metal mesh is pulled onto the frame. It is then degreased for 30 minutes in a 20% solution of oxalic acid, washed with running water and neutralized: from remaining traces of acid with 5% ammonia solution, washed again and cyHjaT (see drawing a).

After that, the mesh holes are filled with tin tin, for example, PIC or Rosa, by hot serving, a plate is obtained (see paragraph 6). Then, at a temperature of 95 ± 5 ° C, a layer of photopolymer is applied, withstanding the workpiece during non-actinic precipitation to level the internal stresses and improve adhesion of the photopolymer to the surface of the plate.

Pa the resulting surface of the workpiece exhibit through the photomask image of the ultraviolet light source.

After irradiation, the preform is held under nonactinic illumination for 20-30 minutes to complete the polymerization reaction.

Next, an image is obtained on the plate by the appearance of methyl chloroform in the solution for 1 -1.5 minutes until clear patterns appear, followed by washing and substance at room temperature (see drawing c).

Then a low-melting alloy is etched in places unprotected by photopolymer in an aqueous solution of hydrogen peroxide and hydrofluoric acid, washed and existed (see drawing g).

Then the photopolymer chloro is removed | .4icTiJM methylsm, washed, dried and get a positive stencil printing form (see drawing e).

The stencil made by such a method has more even and clear image edges compared to a stencil made by a known method, since the photopolymer panosits in this case on a relatively smooth plate obtained by filling the cells with a fusible alloy.

The fla of the enterprise behind the whiteline was used to test the technology of the proposed method. A 004 stainless steel mesh with a mesh size of 0.068 mm was taken as the basis for the stencil. As a photonolimer, a dry photoresisf was used.

(SPF-2-40) on a polyethylene terephthalate basis.

Testing of the proposed method confirms the achievement of the goal of ioretreni. /

Formula and 3 about b and e and

A method of manufacturing a screen printing plate, comprising applying to

pre-stretched and defatted metal mesh of the photopolymer, exposed image, its appearance, fill 1 of the grid cells with a low-melting alloy and remove the remaining photopolymer, which, in order to improve the quality of the printed form, polish the lightly mesh cells (with a floating alloy. transfer the panesekne.m onto the photopolymer network, and after

The images of the image are etched by a low-melting alloy in places unprotected by photopolymer. I

Sources of information taken in

B1 {name during examination:

1.Zotkin K.I. and others. Stencils are nothing. M., “Thought, 1965.

2. USSR author's certificate L 725907, cl. In 41 C 1/14, 1978 (prototype).

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Claims (1)

Claim A method of manufacturing a screen printing form, comprising applying a pre-stretched and defatted metal mesh of a photopolymer to 30, exposing the image, developing it, filling mesh cells with a low-melting alloy and removing the remaining photopolymer35, characterized in that, in order to improve the quality of the printed form, filling the cells nets with a fusible alloy are carried out before applying a photopolymer to the grid, and after 40 manifestations of the image, the fusible alloy is etched in an insecure protected by photopolymer places.