Vacuum blister machine blister material PVC is amorphous structure

PVC is a white powder with amorphous structure, the degree of branching is small, the relative density is about 1.4, the glass transition temperature is 77~90 °C, and it begins to decompose at about 170 °C, and the stability to light and heat is poor. When exposed to sunlight, it will decompose to produce hydrogen chloride, which will further autocatalyze decomposition, causing discoloration and rapid decline in physical and mechanical properties. In practical applications, stabilizers must be added to improve the stability to heat and light.