A glass cloth laminate with high inorganic filler content and its manufacturing process

Abstract

The invention discloses a glass cloth laminate sheet with high inorganic filler content and a manufacturing process thereof. The manufacturing method comprises the following steps: manufacturing the inorganic filler and a surface rubberized fabric, an inner rubberized fabric and a main rubberized fabric with different rubber contents according to the position and effect of a rubberized fabric blank; and then, sequentially paving and hot-pressing the surface rubberized fabric, the inner rubberized fabric and the main rubberized fabric to prepare the glass cloth laminate sheet with high inorganic filler content. The glass cloth laminate sheet with high inorganic filler content prepared by the method is saturated in surface resin, glossy, uniform in color and compact and order in processing end face. In addition, the manufacturing process not only can be used for guaranteeing that a relatively great quantity of inorganic filler is added into the laminate sheet and the inorganic filler content is over 35%, but also can be used for ensuring that the appearance quality of the laminate sheet is not affected by the inorganic filler, so that the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to a glass cloth laminate with high inorganic filler content and a manufacturing process thereof. Background technique [0002] Epoxy glass cloth laminates are generally made of glass cloth impregnated with epoxy resin, and then made into one (regardless of surface and body) or two (surface and body) glued glass cloth prepreg (hereinafter referred to as adhesive cloth) through the oven of the glue machine. , After several sheets are counted or weighed, they are stacked together and hot-pressed by a hydraulic press. This traditional process method is only suitable for the manufacture of laminates without inorganic fillers or with only a small amount of inorganic fillers. With the advancement of science and technology, more and more laminates need to add a large amount of functional inorganic fillers. When the content of inorganic fillers is greater than a c...

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Problems solved by technology

When the content of inorganic fillers is greater than a certain amount, the glass cloth laminates pressed by only one or two types of tapes are prone to the following defects: ①Due to the large amount of fillers, the resin in the tapes on the surface has poor fluidity, and laminates are prone to appear during pressing. Lack of plastic holes, resulting in poor fullness of the resin on the surface of the laminate; ② If the resin in the surface adhesive cloth (baking time in the oven of the gluing machine is shorter) can flow, the filler in the resin moves with the resin during pressing to produce water ripples Formed fillers accumulate, resulting in a dull surface of the laminate; ③Due to the large amount of fillers, the resin fluidity is poor, and the longitudinal glue marks that are easy to be produced in the production of the body tape, cannot be well melted with the surface tape during pressing, resulting in the color of the laminate. Uniform; ④Due to the large amount of inorganic fillers on the surface of the laminate, the edge of the board is easy to drop slag and fry during processing

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