Polyvinyl chloride can be made by substitution reaction of ethylene, chlorine and catalyst. Due to its fire and heat resistance, PVC is widely used in a variety of products in all walks of life: wire sheaths, optical fiber sheaths, shoes, handbags, bags, accessories, signs and billboards, construction and decoration supplies, furniture, ornaments , Rollers, hoses, toys, door curtains, rolling doors, auxiliary medical supplies, gloves, plastic wrap for certain foods, certain fashions, etc.