PVC rigid board is a kind of PVC board made of PVC as raw material. PVC rigid board is a widely used product in industry, especially in the chemical anticorrosion industry. PVC is a resin resistant to acids, alkalis, and salts. Because of its good chemical properties and relatively low price, it is widely used in various industries such as chemicals, building materials, light industry, and machinery.
Polyvinyl chloride, abbreviated as PVC in English, is a polymer formed by the polymerization of vinyl chloride monomer in peroxides, nitrogen compounds and other initiators; or under the action of light and heat according to the free radical polymerization reaction mechanism. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resin.
PVC is a white powder with an amorphous structure. The degree of branching is small, the relative density is about 1.4, the glass transition temperature is 77~90℃, and it starts to decompose at about 170℃. It has poor stability to light and heat, above 100℃ or after a long time. Exposure to sunlight will decompose to produce hydrogen chloride, which will further autocatalyze the decomposition, causing discoloration, and the physical and mechanical properties will also decline rapidly. In practical applications, stabilizers must be added to improve heat and light stability.
PVC is a resin resistant to acid, alkali and salt. Because of its good chemical properties and relatively low price, it is widely used in various industries such as chemical industry, building materials, light industry and machinery. PVC rigid board is a more widely used product in industry, especially in the chemical anticorrosion industry.
PVC rigid boards are usually made by PVC board manufacturers using rolled PVC sheets to be heated and pressed. PVC hard board pressing is divided into 3 heating stages, 1 adjustment stage, and 1 cooling stage.
PVC rigid board is usually made of rolled PVC sheet and heated and pressed. According to needs, this kind of PVC rigid board can be flexibly made into various thicknesses. As PVC is a thermally unstable resin, it will decompose to remove HCl and form a polyene structure. If processed at high temperature for a long time, it will seriously affect product performance. However, PVC is also a poor heat conductor and slow heat transfer. To prepare products with good performance, the heating time is difficult to control. If the heating time is not enough, the inside of the board is easy to layer; if the heating time is too long, it will not only reduce the production efficiency, What's more serious is that PVC will accelerate decomposition at high temperature for a long time, which will affect the performance of the product.