1. The application performance and cost of carrier resin polyolefin filled masterbatch depend on the carrier resin, usually according to the use of the masterbatch, the general content of the carrier resin is 10%~20%. The carrier resin used for polyolefin filled masterbatch should have good compatibility with the filled plastic matrix resin. From this aspect, it is best to use matrix resin for general carrier resins. In addition, when selecting a filler mesh carrier, its melting point and melt fluidity should also be considered, and the melting point of the carrier resin should not be higher than that of the matrix resin.
2. The important filler used to fill the masterbatch is heavy calcium carbonate, followed by talc, kaolin, wollastonite powder and other inorganic fillers. For any inorganic filler, particle size and particle size distribution are the main scientific and technological indicators. Generally, the smaller the particle size and the narrower the distribution, the better the filling effect. Purity is another major scientific and technological indicator of inorganic fillers, the less impurity content, the higher the purity, the better.
3. The additives used in polyolefin filling masterbatches are important dispersants and surface treatment agents. The function of the dispersant is to improve the processing fluidity of the masterbatch, which is conducive to the more uniform dispersion of the masterbatch in the matrix resin. Commonly used dispersants are: white oil liquid paraffin, paraffin, dioctyl phenyl phthalate bop, low relative molecular weight polyethylene polyethylene wax and stearic acid. The important performance of commonly used dispersants can be selected according to the performance characteristics of the filler and carrier resin. Surface treatment agents can change inorganic fillers.
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