The main component of PVC is polyvinyl chloride, which is a slightly yellow semi transparent and glossy color. Transparency is better than polyethylene and polypropylene, but worse than polystyrene. Depending on the amount of additives used, it can be divided into soft and hard polyvinyl chloride. Soft products are soft and tough, with a sticky feel. Hard products have a higher hardness than low-density polyethylene, but lower than polypropylene, and may exhibit whitening at the bend. Common products: boards, pipes, soles, toys, doors and windows, wire sheaths, stationery, etc. It is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene.