Splitting method for ultrathin electronic grade glass fiber cloth

Abstract

The invention discloses a splitting method for ultrathin electronic grade glass fiber cloth. Two times of horizontal needle-punching methods are adopted for high-pressure splitting, fitness between rubber press rolls is adjusted by a press wheel fitness adjusting device, so that good splitting effect on the ultrathin glass fiber cloth is realized, meanwhile, through combination with expanding andshaping treatment of the ultrathin glass fiber cloth and special silane formula for impregnating the ultrathin glass fiber cloth, the high-performance ultrathin glass fiber cloth can be obtained, warpand weft width of the ultrathin glass fiber cloth is increased, weft twist is avoided, physical indexes such as impregnation time and air permeability are reduced, and the technical requirements of high-end copper-clad plate customers for HDI processes, IC package substrate processes and environment-friendly and halogen-free processes can be met.

Description

technical field [0001] The invention relates to the technical field of glass fiber cloth opening, in particular to a method for opening ultra-thin electronic grade glass fiber cloth. Background technique [0002] Electronic grade glass fiber cloth is the basic material of printed circuit boards and is widely used in various electronic fields. With the development of electronic products in the direction of light, thin and short, the basic material copper clad substrate used in electronic products is also required to develop in the direction of high density, light and thin multi-layer and lead-free and halogen-free. The appearance and physical properties of fiber cloth put forward higher requirements: high dimensional stability, impregnation, and no convex particles on the surface, poor gluing, etc. Since the warp and weft monofilament diameter of ultra-thin cloth is 5 microns or less, it is difficult to control the monofilament breakage and force uniformity during the fiber ...

AI Technical Summary

Problems solved by technology

Since the warp and weft monofilament diameter of ultra-thin cloth is 5 microns or less, it is difficult to control the monofilament breakage and force uniformity during the fiber opening process, and the warp and weft yarn width and air permeability are also difficult to meet the needs of high-end CCL customers. Such as HDI process, IC packaging substrate process, environmentally friendly halogen-free process, etc.

[0003] The physical properties of ultra-thin electronic-grade glass fiber cloth currently on the market are generally low. In the process of opening traditional electronic-grade glass fiber cloth, ordinary water is generally used to open the fiber (the angle between the cloth surface and the guide wheel is easy to accumulate). Water causes poor uniformity of fiber opening), or vibrating high-pressure water jet fiber opening (similar to the sieve used, the mismatch between machine speed and vibration frequency in the fiber opening process is likely to cause wave stripes, the greater the vibration frequency, the more obvious the stripes), etc. In addition, glass fiber The cloth fiber opening process is generally to open the fiber first, then impregnate the surface treatment agent, and finally form the finished glass fiber cloth

The ultra-thin glass fiber cloth obtained in this way has poor warp and weft yarn width uniformity, serious weft yarn distortion, long impregnation time, rough cloth surface appearance, high air permeability and other abnormal physical properties and quality, which have caused great troubles to the production of enterprises.

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