韩国道达尔PP RB200

韩华达尔石化共有三大业务：聚合物生产（聚乙烯，聚丙烯，高密度和低密度聚乙烯），基础化工（卖乙烯和丙烯的公司，用来制造合成纤维材料芳烃）和石油产品（喷射，柴油）。
可以根据不同的需要采用不同的螺杆形式。通常情况下多采用单螺杆挤出机或双波状螺杆挤出机或双波状螺杆挤出机，只有在特殊料的生产上采用双螺杆机挤出机，不过对用碳酸钙填充或滑石粉填充、选用单螺杆或双波状螺杆挤出设备完全可以实现。采用机械的办法，在已经生成的聚合物中加入其它聚合物，使其性能发生变化称之为共混改性。以聚丙烯为主体的共混改性可以达到的各种效果.PP 的综合性能优于PE 料。PP 产品质轻、韧性好、耐化学性好。PP的缺点：尺寸精度低、刚性不足、耐候性差、易产生铜害，它具有后收缩现象，脱模后，易老化、变脆、易变形。日常生活中，常用的保鲜盒就是由PP 材料制成。为防止光老化需要在PP 中加入紫外线吸收剂，它可将波290~400nm 的紫外线吸收激化转化为没有破坏性的较长波长的光线。对于埋在土壤中或在室内避光使用的PP 塑料制品仅加入主辅抗氧剂即可，无须加入紫外线吸收剂。PP 的收缩率和结晶度比PE 低。

It is necessary to pay attention to the compatibility of different polymers in blending modification. When two kinds of polymers with poor compatibility are blended, it is often necessary to add the third component with good compatibility, which is called compatibilizer. The dielectric strength of PP is very high and increases with the increase of temperature. These are beneficial to electrical insulation materials in wet and hot environment. On the other hand, the surface resistance of PP is very high, so antistatic treatment must be carried out in some occasions. The application of PP in the field of industry and life consumption will get more rapid development. The sales volume of PP in China has been about 700000 tons a month. At present, China is one of the largest consumption countries in the world. With the colorful life, more and more PP products make consumers feel the superiority of science.

PP 的表面硬度在五类通用塑料中属低等，仅比PE 好一些。当结晶度较高时，硬度也相应增加一些，但仍不及PVC、PS、ABS 等。热性质在五大通用塑料中，PP 的耐热性是。PP 塑料制品可在100℃下长时间工作，在无外力作用时，PP制品被加热至150℃时也不会变形。在使用成核剂改善PP 的结晶状态后，其耐热性还可进一步提高，甚至可以用于制作在微波炉中加热食品的器皿。

PP products are light in weight, good in toughness and good in chemical resistance. Disadvantages of PP: low dimensional accuracy, lack of rigidity, poor weather resistance, easy to produce copper damage, it has t shrinkage phenomenon, easy to aging, brittle, easy to deformation after demoulding. In daily life, the commonly used fresh-kee box is made of PP material. In order to prevent photoaging, it is necessary to add UV absorber into PP, which can transform the UV absorption of 290 ~ 400nm into non destructive long wavelength light. For the PP plastic products buried in the soil or used indoors in the dark, only the main and auxiliary antioxidants can be added, and the ultraviolet absorber is not needed. The shrinkage and crystallinity of PP are lower than that of PE.