Shanghai Daoqin Plastics Co., Ltd.

PBT, full 称polybutylene terephtalate, polybutylene terephthalate (PBT). front introduction PET structure and property 质, this introduction PBT 情况, 总体而言, in property in, PBT ratio PET稍“差”, this is due to PBT structure ratio PET more “柔顺”, lower is PET and PBT structure difference:

PET and PBT difference

【图 sheet/slice 源于: ptonline】

below/following is “ pure ”PBT（ polybutylene terephthalate (PBT) ） property introduction:

1, crystallization property 质: PBT structure 规整, 脂肪烃链节柔顺 property ratio PET in good （丁二 ester and ester comparison ）, therefore PBT ratio PET more easy crystallization, but also PBT crystallization speed degree fast , therefore usually PBT is white crystallization solid 体. PBT generally has in film products in is 无定形状态.

2, force property 质: force property can generally, tensile strength 55MPa, 通 commonly used glass fiber reinforcement , tensile strength can reinforcement.

3, hot property 质: PBT related hot parameters ratio PET low, PBT玻璃化转变 temperature degree is 50 more degree, melt temperature degree large is 220-230摄氏 degree, heat deflection temperature (HDT) 约50-70摄氏 degree, reinforcement rear heat deflection temperature (HDT) can 达210摄氏 degree. 据悉, glass fiber reinforcement rear PBT线 property thermal expansion coefficient is engineering plastics in most small.

4, electrical property 质: PBT is excellent insulation 体

5, resistant ring property: PBT不 resistant strong/high acid, strong/high alkali, type agent and hot water, this and PET versus 似, is structure has ester 键. PBT for has machine solvent agent tool has very good resistant force cracking property .