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日本宝理PBT Duranex 2003正品相关介绍：

PBT is a linear thermoplastic saturated polyester containing ester bonds in its main chain. PBT stands for polybutylene terephthalate.

The polymer belongs to the same family as PET resin.

PBT possesses a high melting point and high crystallinity, while low water absorption and thermal expansion coefficient give the resin superior dimensional stability. Electrical properties are also superior, and only small changes in electrical properties are exhibited as a result of moisture absorption. Dielectric breakdown voltage is also high.

Both crystalline and non-crystalline structures coexist in PBT. As a result, additives can be readily employed to improve properties and render functionality. The grade line up includes a variety of grades possessing various features, such as flame retardant grades, fast molding cycle grades, and high impact strength grades.

PBT is adopted in a wide variety of familiar products used in every day life, such electrical components (connectors, microswitches, and condenser cases, etc.), OA equipments keyboards, VTRs, telephones, auto parts (including in-car electronic products and outer door handles), medical devices, construction materials, and precision equipment.

	DVD-ROM drive frames	Aerosol valves/weights	Electric relay components for air bags

PBT是主链上含有酯基的线性热塑性饱和聚酯聚合物，其化学名为Polybutylene terephthalate，简称PBT, 是和PET树脂同类的高聚物。

由于它具有高的熔点和结晶度，由于其吸水率和线性热膨胀系数很低，因此具有优良的尺寸稳定性。此外，它的电绝缘性也非常优异，因吸潮引起的电性能变化很小，电绝缘破坏电压很高。

在PBT的结晶结构中存在结晶区和非晶区，因此，容易进行共混改性和赋予其各种功能；它有阻燃等级、短周期等级、高抗冲击等级等多种性能不同的等级。

在连接器、微型开关、电容器外壳等的电子零件，OA机器的键盘以及电话机的功能部件、车载电子零件以及车门把手等汽车零部件上都有其应用；其次在医疗仪器、建筑材料、精密仪器等贴近我们的日常生活的许多用品上都采用了这种树脂。

	DVD-ROM驱动器/框架	压缩空气瓶/重锤	安全气囊通电部件