韩国道达尔PP TB52

Hanhuadar Petrochemical has three major businesses: polymer production (polyethylene, polypropylene, high and low density polyethylene), basic chemicals (companies selling ethylene and propylene, which are used to manufacture synthetic fiber materials, aromatics) and petroleum products (injection, diesel oil).
在共混改性中必须注意不同聚合物之间的相容性，在相容性较差的两种聚合物共混时，往往需要加入分别和两种聚合物相容性都好的*三组分，称之为相容剂。PP的介电强度很高，且随温度上升而。这些都是在湿、热环境下对电气绝缘材料有利的。另一方面PP 的表面电阻很高，在一些场合使用必须先进行抗静电处理。PP在工业领域和生活消费领域的应用必将得到更为迅猛的发展.PP在我国的销量已一个月大约70万吨左右，目前中国是世界上用量的消费国，随着生活的多姿多彩PP产品越来越多，让消费者感受到科学的优越性。

The surface hardness of PP is lower than that of PE. When the crystallinity is high, the hardness also increases, but it is still lower than PVC, PS, ABS and so on. Among the five general plastics, PP has the best heat resistance. PP plastic products can work at 100 ℃ for a long time. Without external force, PP products will not deform when heated to 150 ℃. After using nucleating agent to improve the crystalline state of PP, its heat resistance can be further improved, and it can even be used to make utensils for heating food in microwave oven

The density of PP is only 0.90-0.91g/cm3, which is about 60% of PVC density. This means that more products of the same volume can be produced with the same weight of raw materials. The tensile strength and rigidity of PP are good, but the impact strength is poor, especially at low temperature. In addition, if there is orientation or stress in the molding process, the impact strength will be significantly reduced. Although the impact strength is poor, its mechanical properties can compete with high cost engineering plastics in many fields after filling or strengthening.

Different screw forms can be used according to different needs. In general, single screw extruder, double wave screw extruder or double wave screw extruder are usually used. Only in the production of special materials, twin-screw extruder is used. However, it is sible to fill with calcium carbonate or talcum powder, and to select single screw or twin-screw extruder. It is called blending modification that mechanical method is used to add other polymers into the polymer to change its properties. The comprehensive properties of PP are better than that of PE