PBT Vampter 2026 V0 VAMP TECH

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聚对苯二甲酸丁二酯(PBT),是对苯二甲酸和1,4-丁二醇缩聚制成的聚酯,是重要的热塑性聚酯,五大工程塑料之一。
聚对苯二甲酸丁二酯为乳白色半透明到不透明、半结晶型热塑性聚酯,具有高耐热性。不耐强酸、强碱,能耐有机溶剂,可燃,高温下分解。
聚对苯二甲酸丁二酯在汽车、机械设备、精密仪器部件、电子电器、纺织等领域得到广泛的应用。

用途
PBT树脂大部分被加工成配混料使用,经过各种添加剂改性,与其他树脂共混可以获得良好的耐热、阻燃、电绝缘等综合性能及良好的加工性能。广泛用于电器、汽车、飞机制造、通讯、家电、交通运输等工业。例如PBT经玻璃纤维等改性后,可用于制造要求长期在较高温度的工况下,尺寸要求稳定性高的电子零部件。PBT的击穿电压高,适用于制作耐高电压的零部件,由于其熔融状态的流动性好,适合注射加工复杂结构的电器零件,如集成电路的插座、印刷线路板、计算机键盘、电器开关、熔断器、温控开关、保护器等。汽车保险杠、化油器、火花塞、供油系统零部件、点火器等。在通讯领域PBT广泛用于程控电话的集成模块、接线板,电动工具等。

包装运输贮存
PBT树脂采用塑料内衬的自带或塑料编织袋包装,存放干燥、通风、避雨、避暴晒场所存放,远离高温、明火,避免与强酸、强碱、强氧化剂混装混运。

Polybutylene terephthalate (PBT) is a thermoplastic engineering polymer that is used as an insulator in the electrical and electronics industries. It is a thermoplastic (semi-)crystalline polymer, and a type of polyester. PBT resists solvents, shrinks very little during forming, is mechanically strong, is heat-resistant up to 150 °C (or 200 °C with glass-fibre reinforcement), and can be treated with flame retardants to make it noncombustible. It was developed by Britain's Imperial Chemical Industries (ICI).

PBT is closely related to other thermoplastic polyesters. Compared to PET (polyethylene terephthalate), PBT has slightly lower strength and rigidity, slightly better impact resistance, and a slightly lower glass transition temperature. PBT and PET are sensitive to hot water above 60 °C (140 °F). PBT and PET need UV protection if used outdoors, and most grades of these polyesters are flammable, although additives can be used to improve both UV and flammability properties.


Applications
Polybutylene terephthalate is used for housings in electrical engineering, but also in automotive construction as plug connectors and in households for example in showerheads or irons. It is also found processed into toothbrush fibers and false eyelashes, and is used in the keycaps of some high-end computer keyboards because the texture is highly resistant to wear and discoloration due to UV radiation.[contradictory]

PBT can also be made into yarn. This has a natural stretch similar to Lycra and can be incorporated into sportswear. Due to its chlorine resistance it is commonly found in swimwear. Further, recent studies have shown that PBT has superior UV properties to PET based fabrics such as T400.

PBT, especially glass fibre grades, can be effectively fire-retarded with halogen-free products. Phosphorus-based flame retardant systems are used in these fire-safe polymers and are based on aluminium diethyl phosphinate and synergists. They are designed to meet UL 100 flammability tests as well as Glow Wire Ignition Tests (GWIT), Glow Wire Flammability Test (GWFI) and Comparative Tracking Index (CTI). Main applications are in the electrical and electronics (E&E) industry.