The shrinkage rate of plastic refers to the percentage of the difference between the size of plastic parts at molding temperature and the size after being taken out of the mold and cooled to room temperature. It reflects the degree of size reduction of plastic parts after they are taken out of the mold and cooled. The factors that affect the shrinkage of plastics are: plastic varieties, molding conditions, mold structure and so on. Different polymer materials have different shrinkage rates. Secondly, the shrinkage rate of plastic also has a great relationship with the shape of plastic parts, the complexity of internal structure and whether there are inserts. PPPEMEGGPA 6 is a classification of plastics, which represents different kinds of plastics. PP is the abbreviation of polypropylene, PE is polyethylene, MEG is the monomer derivative of polysaccharide polymer, PA6 is the abbreviation of nylon, and nylon 6 is one of them. TDS is the abbreviation of TECHNICALDATASHEET, which refers to the physical property table of this material.