(苯乙烯/丁二烯)共聚物的性能与注塑加工

PROPERTY AND INJECTION MOULDING OF STYRENE/BUTADffiNE COPOLYMER

(苯乙烯/丁二烯)共聚物(S/B)属无定形聚合物,透明度高、光泽性好、耐冲击、加工性能良好,可以在通用注塑机上加工成型,但在高温下容易降解,影响制品的力学性能和表面质量,因此在设备选用、模具设计、工艺参数选用、制品缺陷解决过程中要考虑这一点。实践证明,通过合理调整注塑工艺,可以加工出外观平滑、光泽好、透明度高的S/B制品。重点介绍S/B的性能和注塑加工工艺、实际生产中设备的选用、产品造型及模具设计等注意事项,以及常见缺陷的解决方法。

Styrene/butadiene copolymer (K -resin) is a kind of unformed polymer polymerized by styrene and butadiene with high transparency, good glossary and machining property, which can be processed in the common injection moulding machine. However, it is easy to degrade under high temperature, thus will affect the mechanical property and surface quality of the products, which should be considered during the process of the equipment choosing, mould designing, technical parameter setting and the defaults avoiding of the products. It is proved that the products with high glossary, transparency and smooth surface can be produced by choosing a proper injection moulding technology. The property and the injection moulding technology of K - resin are introduced as well as the choice of the equipment and the design of products and moulds in practical application and the ways to solve the common defaults during the operation.