A kind of screen printing screen and preparation method thereof

Abstract

The invention discloses a screen printing screen and a preparation method thereof. The screen comprises a frame, a polyester net arranged in the frame and having a hollowed-out area in the center, and a steel wire mesh located at the hollowed-out area. The area of ​​the steel screen is larger than The area of ​​the hollowed out area, the mesh number of the steel mesh is greater than the preset value, the steel mesh and the polyester mesh are bonded together by a hot melt adhesive of a certain width, and the width of the hot melt adhesive is greater than the width of the overlapping part of the steel mesh and the polyester mesh , and the outer size of the hot-melt adhesive is smaller than the size of the polyester net, so that a stress release area is formed between the hot-melt adhesive located at the periphery and the polyester net located at the edge of the frame; it also includes a poly in the stress release area First sealant layer on ester mesh surface. The above-mentioned technical scheme disclosed in this application releases the stress through the polyester mesh in the stress release area, so that the steel mesh can get an effective rebound, so as to reduce the explosion rate of the high-mesh screen printing screen plate, thereby prolonging the high-mesh number. Increase the service life of the stencil and improve the printing quality.

Description

technical field [0001] The invention relates to the technical field of printing devices, in particular to a screen printing screen plate and a preparation method thereof. Background technique [0002] Screen printing has been widely used in solar cell manufacturing, microelectronic component manufacturing, circuit board manufacturing and other fields due to its low cost, mature technology, and easy operation. [0003] In screen printing, the commonly used screen printing screen includes a frame, a polyester mesh arranged in the frame, and a low mesh number (the mesh number is less than A certain value) steel mesh plate (because the mesh number of the steel mesh plate is relatively low, so its wire diameter is relatively thick, about 16μm-18μm), in which, the polyester mesh and the steel mesh plate are fully melted Bonding, that is, the entire area of ​​the polyester mesh is pasted with hot-melt adhesive to fix the steel mesh plate on the polyester mesh by heating and curing...

AI Technical Summary

Problems solved by technology

However, in order to improve printing accuracy and quality, improve the efficiency of solar cells and the performance of microelectronic components, etc., narrower and narrower printing lines are required to meet the above requirements. At this time, screen printing with low mesh number and wide line diameter Screen version no longer available

[0004] Therefore, at present, steel screens with high mesh number (the mesh number is greater than the above-mentioned certain value, such as: high mesh number can refer to 480 mesh) and thin wire diameter (the wire diameter is about 11 μm) are used for screen printing. , but because the hardness of the polyester mesh after full hot melting is relatively large and the wire diameter of the high-mesh stencil is relatively thin, the steel wire in the stencil will be affected by the stress when the scraper squeezes the screen printing screen. The existence of disconnection will cause the screen printing screen to explode and reduce the service life of the screen printing screen, and continue to use the screen printing screen after the disconnection for printing will affect the printing quality

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