PET 4210G6南亚

PET 4210G6南亚的密度:1.47 g/cm3 成型收缩率:0.55 % 缺口冲击强度:10.8 弯曲模量:8333 MPa 热变形温度:215 ℃

常用于电子电器,家用电器,汽车部件

Performance and advantages:

PET is called polyethylene terephthalate in Chinese. It is a kind of polymer prepared by condensation polymerization of terephthalic acid and ethylene glycol. According to its state, PET can be transparent, colorless or white, non-toxic, and has excellent mechanical properties, especially after stretching orientation. As the quality index of PET, there are mainly intrinsic viscosity, melting point, glycol monocondensate content, carboxyl content and so on. The melting point depends on the regularity of the molecular chain structure of PET. If there are no side effects in the synthesis process, the melting point of PET can reach 275. C. However, it is impossible to achieve this. Ethylene glycol monocondensate is formed and polymerized into the molecular chain of PET, which destroys the regularity of the chain and decreases the melting point. Ethylene glycol content: Ethylene glycol is formed by dehydration of ethylene glycol at polymerization temperature. The results show that it is mainly formed in the transesterification and pre-polycondensation stages. Alcohols contain ether bonds, which are more flexible and can significantly reduce the melting point of resins

Use and market:

The comprehensive performance of PET resin sheet is excellent and conforms to the world tide of environmental protection. The demand of all countries in the world has increased dramatically, and the development of PET resin sheet has been unprecedented. Although the price of PET sheet is higher than that of PVC sheet and BOPS sheet, because of its high transparency, high strength, high function, strong environmental adaptability, strong recyclability (no harmful gases produced during incineration), it has been widely used. Mainly used in food packaging containers, industrial packaging lampshades, etc. Its use is still expanding. At present, the world's main bottle polyester manufacturers and product performance, the factory products can usually provide a series of varieties and brands and performance according to user needs. Acid content of PET: The acid value is expressed as the number of carboxyl moles per 1069 resin. The reasons for the carboxyl group in PET resin are unesterified, hydrolyzed and oxidative degradation.