Low-gloss polypropylene composite and preparation method thereof

Abstract

The invention provides a low-gloss polypropylene composite and a preparation method thereof. Modified polypropylene has low gloss while maintaining excellent mechanical properties. The low-gloss polypropylene composite comprises components in parts by mass as follows: 40-90 parts of polypropylene resin, 5-30 parts of inorganic filler, 5-30 parts of a matting agent and 0.2-0.4 parts of an antioxidant. The modified polypropylene prepared by blending and extruding the components has low gloss and excellent mechanical properties, and can be widely used as a material for automobiles and electronics.

Description

1. Technical field: [0001] The invention relates to a preparation method of modified polypropylene, in particular to a low-gloss polypropylene composite material and a preparation method thereof. 2. Background technology: [0002] Polypropylene (PP) has the advantages of low density, excellent mechanical properties, good stress crack resistance, fatigue yield resistance and chemical resistance, and has the advantages of cheap price, easy processing and molding, recycled and recyclable, etc. It has been widely used, especially in the automotive industry, household appliances and machinery fields. However, due to the poor low temperature resistance and low rigidity of polypropylene materials, it cannot meet the requirements for use in interior and exterior parts of automobiles, so it must be modified. The main modification methods of polypropylene include elastomer-toughened polypropylene modification; inorganic filler-filled reinforced polypropylene modification; and the use...

AI Technical Summary

Problems solved by technology

[0004] Degloss removal by surface embossing has been used in practice, but requires a separate step, which increases cost, and subsequent abrasion removes the embossed matte surface, allowing the gloss to reappear

[0005] In addition, low gloss can also be obtained by spraying matte paint on the surface of the product, but its production cost is high, and sometimes it cannot meet the requirements of use. With the extension of production time, it may need to be reprocessed

[0006] Studies have shown that adding finely divided fillers such as silica, silicate, aluminate or other inorganic fillers can reduce the gloss of polypropylene composites. However, the amount of inorganic fillers added is small, and the gloss reduction is not obvious. Can not meet the use requirements; adding too much will cause the reduction of the physical properties of the product, especially the reduction of the impact strength is more significant, in addition to the corresponding reduction of the heat distortion temperature, the reduction of the strength of the weld seam, insufficient heat aging and light aging

Images