韩国道达尔PP HI831

韩华达尔石化有限公司（Hanwha Total）是韩华和道达尔的合资企业，更具体地说是三星综合化学品和道达尔石化的合资企业。韩华和道达尔各持有该公司50％股份。
加煅烧高岭土提高PP电绝缘性,加硅灰石针状有一定增强效果、提高PP表面硬度，加沉淀硫酸钡重晶石粉提高PP制品表面光泽、材料密度，加氢氧化铝、氢氧化镁水镁石粉作为阻燃剂使用，达到填充、阻燃、消烟三重效果，加炭黑制作导电塑料，PP达到*抗静电效果，提高耐光照老化性，加金属粉末制作导电塑料，达到*抗静电效果，加木粉降低成本、有利资源再生利用，加石墨、二硫化钼、聚四氟乙烯提高润滑性、减小摩擦力，对于PE、PP、PVC 三元共混物，除了加人相容剂CPE、EPR 外，还可利用反应挤出技术制备合金。如用马来酸酐或马来酸酯进行接枝反应来增容。在此方法中塑化、接枝反应、共混在螺杆挤出机中进行，能一次完成，要求螺杆挤出机的螺杆长径比在40左右，中间有排气和加料口，螺杆挤出机可以是单螺杆挤出机也可以是双螺杆挤出机。

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.

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。

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. PP is a high crystalline plastic. When it is near the melting point, the volume difference between its liquid and solid state is very large. In addition, the anisotropy of its shrinkage makes it easy to cause uneven shrinkage, that is, shrinkage. Therefore, when designing products, try to avoid uneven wall thickness. Polypropylene has small melt viscosity, good fluidity, and the ratio of flow length to flow length to thickness is large. Thin wall products may also be able to be injected But at the same time, when making the mold, the precision should be high, otherwise it will batch peak; because of its anisotropy, the product is often deformed. The shrinkage rate was 18 ‰ and the overflow value was 0.03mm. Polypropylene does not absorb water and generally does not need to be dried. Sometimes, for the sake of product quality, it can be dried at 60 ℃ for 30 minutes to 1 hour to discharge the floating water in the raw material.