5, PP plate contraction rate is very high. PP board because it is semi-crystalline materials engineering plastic box installation, shrinkage is generally 1.8 to 2.5%. And shrinkage direction uniformity than PE-HD material is much better. 6, with excellent resistance to moisture absorption, resistance to acid corrosion, anti-solubility. (5) good chemical resistance than all other foam; resistant to oils, to meet the needs of greasy food packaging. (6) good resistance to stress cracking. (7) compared with the foam PS, no gas release when burned. (8) recyclable. (9) degradation outperforms PS foam and foamed PE. Plastics Engineering boxes erected Zhen Wei _ _ Southeast plastics engineering plastics boxes provided by Foshan Plastics Co., Ltd. Wei Zhen. Foshan Plastics Co., Ltd. Wei Zhen (cxsy2009.1688.com/) Guangdong Foshan, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhen Wei Plastic leadership with the staff warmly welcome all inquiries negotiations to create Zhen Wei Plastic a better future.