Imitation natural stone sheet and making process thereof

Abstract

The invention discloses an imitation natural stone SMC/BMC sheet and a making process thereof, relating to a thermal insulating decoration material for a wall. Heat-resistant resin is adopted for the imitation natural sheet to increase the resin content, reduces the shrinking agent content, increases the ultraviolet-resistant absorbent and antioxidant, reduces calcium powder, and increases the aluminum hydroxide, natural color stone particles and real stone particles. The components of the raw material comprises resin, low shrinking agent, ultraviolet-resistant absorbent, antioxidant, dispersant, calcium powder, aluminum hydroxide, natural color stone particles, glass fiber, release agent, magnesium oxide and curing agent. The steps of confecting the low shrinking agent, mixing, adding filler, online mixing and thickening are performed to obtain the product. The invention can produce imitation stones and granite products of various colors and patterns and external wall panels of various veined patterns and tones as well as internal wall decoration board. The invention has the characteristics of aging resistance, no color change, great strength, high hardness, good flame retardant effect and the like, and is an excellent product for both indoor and external wall decoration.

Description

technical field [0001] The invention relates to a wall thermal insulation decoration material. Background technique [0002] At present, the SMC molding process and BMC injection molding process in composite materials are composed of polymer resin, glass fiber, calcium powder, shrinkage agent, thickener and so on. Due to the existing formula ratio, the tone of the molded sheet in actual production is single. The inner coloring has problems such as uneven flow direction and serious flow lines under high temperature and high pressure. The main color is original white, and there are few varieties of designs and colors, which plague the development of products in the field of building materials. In order to open up the market and increase varieties, some companies have changed the single pigment paste into small granules, etc., but the thermal variation coefficient of calcium powder and glass fiber is different, and problems such as pinholes and depressions are prone to occur a...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an imitation natural stone sheet and its production process to solve the problem of single color tone of the molded sheet in the prior art, uneven flow of inner coloring under high temperature and high pressure, serious flow lines, discoloration, flowering, and fading of the existing technology. Yellow: prone to pinholes, dents, few varieties of designs and colors, single product, poor UV resistance, fast pigment fading, not aging resistance, etc.