The recycled waste plastics are divided into polyethylene, polypropylene, polyvinyl chloride, polyester, polystyrene, ABS, PA, etc. Among them, PE includes plastic greenhouse materials, industrial packaging films, lactic acid beverage bottles and so on. , PP includes woven bags, packing belts, binding ropes, etc. PVC includes plastic door and window profiles, pipes, etc. PET includes tea beverage bottles such as cola and sprite, and EPS is commonly known as foam plastic. Old plastic is a popular term, which does not mean discarded, obsolete and useless plastic products. Most plastic products, especially a large number of disposable plastic products, have no great changes in the properties of their plastic materials after use, and can be completely recycled and processed into plastic products through appropriate methods for reuse. Old plastics are more formally called post-consumer plastic waste, which refers to waste plastic products after consumption or use. In the process of synthesis, molding and circulation, plastics will also produce waste products, which are also called plastic waste before consumption. Although this also belongs to the category of waste plastics, because of its relatively small quantity, easy recycling and high recycling value, general manufacturers will recycle their own products and directly use them for production.