描述
PBT塑料树脂颗粒
建筑装饰业
交通运输业、广告业
电气、化工机械、汽车业
PBT塑料树脂颗粒
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PBT有很多种。除普通增强级外，还有阻燃剂、玻璃纤维增强、玻璃纤维增强阻燃剂和混合金级。混合金制品可与聚对苯二甲酸乙二醇酯（PET）、聚碳酸酯、尼龙、聚苯醚等混合，形成聚合物合金 PBT的合成一般有两种方法，一种是以对苯二甲酸二甲酯（OMT）和1.4丁二醇（BD）为原料的酯交换法；另一种是以精对苯二甲酸（PTA）和1.4丁二醇（BD）为直接酯化法为原料。两种方法得到的酯化产物可以通过缩聚反应得到目标产物PBT。由于直接酯化法路线原料消耗低，产生的副产物少，因此具有四氢呋喃的优点PBT在包装材料中的应用由于PBT树脂中-CH2-链的生长，分子链易于弯曲，因此玻璃化转变温度低于PET，结晶速度加快，易于加工成型并能满足环境管理标准Iso的要求，其包装应用前景非常好 PBT的注射成型性能可以利用其耐热性、抗药性和绝缘性，用于电气、电子零件和汽车零件等工程塑料。用于包装的薄膜级PBT的外部熔体粘度必须高于注塑级P8T。通常，固相聚合用于获得高聚合点，即高熔体粘度
PBT Plastic Resin Pellet
Architecture Decoration Industry
Transportation Industry, Advertisement Industry
Electric & Electrical, Chemical Machinery,
Automobile Industry
PBT Plastic Resin Pellet
Product Details
PBT Plastic Resin Pellet
As a thermoplastic resin, polybutylene terephthalate (PBT) has good resistance to dissolution, high heat resistance, good ductility, high strength and modulus, and the melt viscosity of PBT is relatively high. Low crystallization speed, easy to form, can be used as raw materials for engineering plastics, films and synthetic fibers, widely used in electronic communication equipment, computers, industrial equipment, lighting systems, automotive internal and external parts and other fields.
There are many varieties of PBT. In addition to the reinforced ordinary grades, there are also flame retardant, glass fiber reinforced, glass fiber reinforced flame retardant, and mixed gold grades. The blended gold products can be mixed with polyethylene terephthalate (PET), polycarbonate, nylon, polyphenylene ether, etc. to form polymer alloys.
There are generally two methods for the synthesis of PBT, one is the transesterification method using dimethyl terephthalate (OMT) and 1.4 butanediol (BD) as raw materials; the other is using purified terephthalic acid ( PTA) and 1.4 butanediol (BD) are the direct esterification method as raw materials. The esterified products obtained by the two methods can obtain the target product PBT through polycondensation. Because the direct esterification method route has low raw material consumption and generated by-products The advantages of tetrahydrofuran [THF), such as easy recovery, have been paid more and more attention.
Application of PBT in Packaging Materials
Due to the growth of -CH2- chain of PBT resin, the molecular chain is easy to flex, so the glass transition temperature is lower than that of PET, the crystallization speed is increased, and it is easy to process and shape. Because of its comprehensive performance and can meet the requirements of the environmental management standard Iso, its packaging application prospects are very good.
The injection molding properties of PBT can be used for engineering plastics such as electrical, electronic parts and auto parts by using its heat resistance, drug resistance and insulating properties. The film-grade PBT used for packaging must have a higher external melt viscosity than the injection-molding grade P8T. Usually, solid-phase polymerization is used to obtain a high polymerization point, that is, a high melt viscosity.
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