PP filler is made of high-quality ultra-fine calcium carbonate as the main raw material, mixed with various additives such as carrier resin and dispersant, lubricant, coupling agent and modifier, and fully mixed by high-performance twin-screw extruder and under refining, extrusion and granulation. Nowadays, PP filler is a very common filler material in the production of plastics and has a very wide range of applications. However, with the continuous use of PP fillers, we also found a problem. When adding a certain amount of filler masterbatch directly into the PP pellets to produce injection products, the PP fillers are not well plasticized, and the surface has white spots, which is very obvious that this material comes from the filler masterbatch.

 
    The use of PP fillers has a phenomenon of poor plasticization, which has many constraints on the development of PP fillers. In order to solve this problem, the continuous research of PP filler manufacturers showed that it is likely to be the quality of fillers that caused poor dispersion.
 
    There are currently five common methods for changing this problem. Increase the injection temperature of PP, and increase the decomposition temperature of PP at a safe temperature of about 300 degrees to increase the back pressure. The filler masterbatch with lower mesh should be used, the mesh may be the cause of uneven packing dispersion. A relatively low mesh has better dispersion. Add some lubricating dispersant and improve the production process. If the requirements for filler masterbatch are relatively high, it is recommended to use the transparent filler masterbatch on the market, the effect will be better.
 
    The problems caused by PP fillers require further research until the problem can be solved very effectively. The development of PP fillers requires strong technology as support, and problems are solved in a timely manner, so as to promote the continuous advancement of PP fillers.