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Screen printing and its making technology

A technology of screen printing plate and metal screen, applied in printing process, screen printing machine, printing plate, etc., can solve the problem of poor adhesion of light-cured resin layer, stability of tension, uniform thickness of screen There are problems such as the uniformity of the thickness of the printed layer, so as to increase the amount of dye transferred, reduce the wear of the printing plate, and improve the permeability

Inactive Publication Date: 2004-05-12
MURAKAMI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, metal fiber screens and metal sheet screens do not have good adhesion to the photocurable resin layer (resistance layer) as the image layer, and are easy to separate from the photocurable resin layer during printing, and the metal screen is tightened in addition. There are also problems with the stability of the tension, the uniformity of the thickness of the screen, and the uniformity of the thickness of the printing layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1 and comparative example 1

[0081] (1) Stretching step

[0082] Stretch a 325-mesh, 64.0μm-thick stainless steel fiber screen on an aluminum die-cast screen frame with a size of 320mm×320mm through a mechanical stretcher to prepare a stainless steel screen printing plate stretched on the aluminum screen frame . Two such plates were prepared.

[0083] (2) Sand blasting step

[0084] One of the two printing plates was blasted on its printing surface for 60 seconds with a blaster (model SC, blasting material No. 800 (alumina), manufactured by Fuji Manufacturing Co., Ltd.).

[0085] The other plate was not sandblasted.

[0086] As a result, it was found by surface roughness material equipment (profile measuring microscope VF-7500, manufactured by Keyence Corporation) that the stainless steel wire subjected to sandblasting roughening to generate many pits with a depth of about 3 μm (the percentage of pits was 60%) The mesh formed a satin pattern over the entire surface (Example 1).

[0087] On the other ...

example 2 and comparative example 2

[0102] (1) Stretching step

[0103] Stretch a 225-mesh polyester fiber screen with a thickness of 73 μm on an aluminum die-casting frame with a size of 320mm×320mm through a mechanical stretcher to prepare polyester filaments stretched on the aluminum frame screen printing version. Two such plates were prepared.

[0104] Then, a high-tensile stainless steel fiber mesh with an opening size of 360 mesh (filament diameter: 16 µm) was laminated and pasted on the central portion of the polyester mesh with an adhesive. The overlapping part of the polyester screen is removed, and the printing plate of the combined screen is stretched on the screen frame. Two such plates were prepared.

[0105] (2) Sand blasting step

[0106] One of the two printing plates was blasted on its printing surface for 30 seconds with a blaster (model SC, blasting material No. 1000 (alumina), manufactured by Fuji Manufacturing Co., Ltd.).

[0107] The other plate was not sandblasted.

[0108] As a resu...

example 3

[0122] Repeat the operation of Example 1, using polishing instead of sandblasting.

[0123] The results of the evaluation are shown in Table 5.

[0124] polishing

[0125] The tensioned wire mesh was slowly passed between two rotating non-woven fabric polishers "CP wheel7 AVF" manufactured by 3M Company to form a straight hair pattern containing a large number of dimples with a depth of 4 μm.

[0126] Evaluation results

[0127] coarsening

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Abstract

To make the thickness of a printing film uniform by early stabilizing a fabric tensioning tension, making a screen thickness constant, improving adhesive properties of a resist film to a screen, improving a dimensional accuracy, upgrading ink permeability, increasing a paste transfer amount, omitting a waste print, and improving a positional accuracy of a printed product. In the screen printing plate, an image layer made of a photosensitive resin is formed on a surface of a screen spread in a frame. In this case, a metal screen having a recess portion formed of a roughness of 0.05 to 20 [mu]m is formed. A surface of the screen in the frame is coated with a photosensitive emulsion, dried to form a photosensitive resin layer, then exposed through a mask to form a latent image, and an image layer is formed by developing. In this case, powder particles having 100 to 2,000 mesh are blown to the screen and / or the surface of the screen is ground by buffing.

Description

[0001] This application was filed on June 1, 2000 by Murakami Co., Ltd., the applicant. It is a divisional application of the application with the application number 00117934.9 and the title of the invention "screen printing plate and its manufacturing process". technical field [0002] The invention relates to a screen printing plate using a metal screen, and a process for making the printing plate. Specifically, the present invention relates to a screen printing plate, which can realize the tension stability and uniform screen thickness in the early stage of the screen by tightening the wire mesh, and can improve the adhesion between the resistance layer and the wire mesh during the plate making process. In the printing process, it can improve the permeability of the ink, increase the amount of dye transferred, reduce invalid printing and improve the positioning accuracy of the printed product, the uniformity of the thickness of the printing layer, and reduce the wear of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F15/34B41C1/14B41F15/36B41N1/24G03F7/00G03F7/12
CPCB41C1/147B41N1/24G03F7/20
Inventor 宫坂四志男间濑惠二村上泰藏长尾文隆井上和夫
Owner MURAKAMI CORP
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