PVC roofing tiles are made of polyvinyl chloride resin (PVC for short) as the main raw material, supplemented by UV anti-UV agents and other chemical raw materials, after scientific proportioning.

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PVC is a white powder with an amorphous structure, a small branched degree, a relative density of about 1.4, a glass transition temperature of 77~90℃, decomposition starts around 170℃, poor stability to light and heat, above 100℃ or by long time sunlight exposure.