A kind of PVC sheet and preparation method thereof

Abstract

The invention relates to a preparation method of PVC sheets. The preparation method is characterized by comprising the following steps that (1) a PVC rolling film is cut into sheets, and the PVC rolling film sheets are stacked on a steel plate and fixed; (2) the PVC rolling film sheets are put into a laminator for heating and pressurization in six stages, in the first stage, the pressure is 500-900 psi, the temperature is 120-140 DEG C, and the time of duration is 5-15 min; in the second stage, the pressure is 600-1,050 psi, the temperature is 155-185 DEG C, and the time of duration is 5-15 min; in the third stage, the pressure is 700-1,200 psi, the temperature is 165-195 DEG C, and the time of duration is 5-15 min; in the fourth stage, the pressure is 800-1,350 psi, the temperature is 175-200 DEG C, and the time of duration is 5-15 min; in the fifth stage, the pressure is 950-1,500 psi, the temperature is 180-210 DEG C, and the time of duration is 5-15 min; in the sixth stage, the pressure is 1,100-1,800 psi, the temperature is 185-220 DEG C, and the time of duration is 5-15min; and (3) the temperature is lowered, the pressure is released, and the PVC sheets are obtained. The PVCsheets prepared by the preparation method have the advantages of both glass and plastic, are ultra-transparent and not fragile, have good weather resistance and flame retardance, and can be used as asubstitute for the glass on windows of yachts and sports cars.

Description

technical field [0001] The invention relates to a PVC sheet and a preparation method thereof, belonging to the technical field of PVC sheets. Background technique [0002] Polyvinyl chloride plastic is a polymer formed by free radical polymerization of vinyl chloride monomer, referred to as PVC, which is one of the largest plastic products in the world. , pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc. are widely used. [0003] In view of the problem that glass is easy to break during transportation and use, and is expensive, while plastic has good toughness and economy, plastic as a substitute has long been considered one of the directions for breakthroughs. However, the ultra-thick PVC sheets produced by the existing PVC calendering process are not comparable to glass in terms of transparency, haze, crystal points, flow marks and surface gloss. However, ordinary laminating technology cannot solve the crystal point, tr...

AI Technical Summary

Problems solved by technology

However, the ultra-thick PVC sheet produced by the existing PVC calendering process cannot compare with glass in terms of transparency, haze, crystal point, flow marks and surface gloss.

However, the ordinary laminating process cannot solve the problems of crystal point and transparency, which leads to the delay of PVC in solving the problem of replacing glass in practical applications.