Shanghai Daoqin Plastics Co., Ltd.

titanium powder color property can titanium powder color property can
　　TiO2 tool has pure 洁 白 degree, micro fine degree , is white PVC异 type most color agent, titanium powder mono pure used as material 时, its most 佳粒径 is 0.14-0.23. titanium type TiO2 has more high degree, in gas lower short use plastics products and inner use plastics products and large more plastics packaging film can use titanium type TiO2 color.

　　 type has 时会发生变 color, color has types 情况, production process color and use process color. front more stabilizer and processing process has 关, stabilizer amount 不够, process temperature degree 设置不 combined 理. in use process in color (变灰, 变红, 变黑) and other, and TiO2 quality and Model/Grade selection has 一定关系.

　　TiO2 surface light catalytic chemical reaction process in generate active property 原子团 can 同PVC blending material in certain raw materials oxidation also reaction. in salt formulation in oxidation also reaction process in generate black 铅, white type 材发生灰黑 phenomenon. light generally time rear, type surface phenomenon can 逆转. about/regarding this main/primary factors has:

　　(1)射线 strong/high degree : 若射线 strong/high degree to TiO2 absorption 边界则不 can light catalytic chemical reaction, can oxidation also reaction, type 材不会发生灰黑 phenomenon.

　　(2) ring temperature degree : temperature degree for chemical reaction speed rate has very large effect/influence, usually temperature degree increase 10℃, reaction speed rate increase 一倍. in hot 夏天, TiO2 color material surface can to 50-70℃, this for light catalytic has large effect/influence.

　　(3) ring wet degree : and TiO2 surface combined water for TiO2 light catalytic reaction to key/critical function. polymer has relatively high water expand dispersion rate, wet ring has light catalytic reaction, generate phenomenon.

　　(4)铅 salt stabilizer quality 不 关: type 材TiO2 oxidation also color for use salt stabilizer 而言, use has machine 锡则变 color more 见.

　　(5) titanium powder quality : use titanium type TiO2则 easy 发生变 color phenomenon, also has Ti02 包 film 处理状况, in addition Ti02 also need 进行脱 water 处理, TiO2 use amount 不足也 easy oxidation also reaction.

　　(6) in type in , as is white material TiO2 content high 时, 会发生一 types phenomenon, this is 包埋 plastics raw materials 颜 material pellets to type surface, generate powder 化. usually weather resistance relatively good TiO2裸露 in outer pellets relatively less, generally large 于10%.