Method for preparing polyphenylene sulfide plate with large plane

Abstract

The invention relates to a preparation method of a large planar polyphenylene sulfide board, in particular to a preparation method of a polyphenylene sulfide board, which aims at solving the problem existing in the prior art that the large planar polyphenylene sulfide board with good mechanical property is not easy to be prepared. The method comprises the following steps: a polyphenylene sulfide composite material is put into a hot-air drying oven at the temperature of 100-150 DEG C and kept for 4 to 8 hours; the polyphenylene sulfide composite material is fused at the temperature of 280-320 DEG C, mixed together and squeezed out, and the fused mass thereof is squeezed into a compacting die heated to the temperature of 280-320 DEG C; the initial states under the identical die stamping pressure and die stamping height are maintained at the temperature of 280-320 DEG C; when the temperature of the fused mass is reduced to 260-280 DEG C, pressure is applied, and pressure complementing isstopped when the temperature is reduced to 230-250 DEG C; the gradient type annealing treatment is carried out when the temperature of the fused mass is reduced between 150 and 250 DEG C; and then, natural temperature reducing and pressure maintaining are performed, stripping is carried out by pressure releasing when the ambient temperature is reached, and then the finished product is obtained. The method can be widely applied to special tool boards, working tabletops, and the like.

Description

technical field [0001] The invention relates to a preparation method of a polyphenylene sulfide plate, in particular to a preparation method of a large plane polyphenylene sulfide plate. Background technique [0002] Polyphenylene sulfide (English abbreviation: PPS) is a new type of high-performance thermoplastic resin, which has excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, balanced physical and mechanical properties, excellent dimensional stability and excellent electrical properties. Performance and other characteristics, it is widely used as a structural polymer material, and is widely used as a special engineering plastic after filling and modification. As a special engineering plastic with a high degree of engineering, in order to expand the scope of application, the development trend of polyphenylene sulfide has been developed from the use of most injection molding products to the manufacture of profiles. In terms...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing polyphenylene sulfide preparation method that it is not easy to prepare a large flat sheet, the prepared large flat sheet is easy to warp or brittle or has a long molding cycle, uneven solid state mixing, and poor mechanical properties. A method for preparing a large-plane polyphenylene sulfide sheet is provided, so that the prepared large-plane polyphenylene sulfide sheet has good mechanical properties, is not easy to warp, is uniformly mixed in a solid state, meets requirements for toughness, has controllable thickness and smaller thickness tolerance, and Simple equipment and easy mass production