1. Good color, easy to color, and can be made of light-colored plastic products. The disadvantage is that the color of colored plastic products is not bright enough, which is acceptable in most cases. Shiraishi rice

2. The hardness is low and its Mohs hardness is 3, which is much lower than the hardness of the steel (such as nitride steel, high-speed steel) used in manufacturing and processing machinery and molds. Therefore, the filling plastic has an impact on the equipment parts (screws, barrels, etc. ) And the mold wear is lighter.

3. Good thermal and chemical stability. When the thermal decomposition temperature of calcium carbonate is above 800℃, thermal decomposition will not occur at all plastic processing temperatures (below 300℃). Calcium carbonate is a strong base and weak acid salt. Except for acidic media, it has good chemical stability.

4. Easy to dry, no crystal water, and the adsorbed water can be easily removed by heating.

5. Non-toxic, non-irritating, and tasteless. Especially our country has abundant resources of calcite, marble, and limestone, and there is a lot of choice. Most of the resources are of good quality, especially the content of heavy metals is extremely low, which meets the national sanitary requirements.

6. The price is cheap. Both heavy calcium and light calcium are very cheap in various non-mineral powder materials, which means that any non-mineral powder material is only trying to replace calcium carbonate as a plastic filler, rather than highlighting it. The characteristics of this powder material itself are meaningless.