Low-gloss scratch-resistant polypropylene composite material capable of being used for automotive interior parts and preparation method of composite material

Abstract

The invention discloses a low-gloss scratch-resistant polypropylene composite material capable of being used for automotive interior parts and a preparation method of the composite material. The composite material comprises the following raw materials, in parts by weight: 57-77 parts of polypropylene, 10-20 parts of talc powder, 0-14 parts of polyethylene with an ultra-high molecular weight, 2-6 parts of matting functional masterbatch, 0-1 part of an antioxidant, and 0-3 parts of other auxiliary agents. According to the composite material and method provided by the invention, the high-efficiency matting functional masterbatch is added on the basis of a formula of a conventional polypropylene composite material, when the masterbatch is extruded from a twin-screw extruder or an injection molding machine along with the polymer system, inorganic fibers in the matting functional masterbatch can be well dispersed into the surface layer of the composite system, a low-gloss thermoplastic elastomer is introduced into the matting functional masterbatch, and the thermoplastic elastomer can synergize with the inorganic fibers to ensure the low-gloss performance of the material; and the polyethylene with the ultra-high molecular weight is added into the system, so that the prepared polypropylene composite material has certain scratch resistance, and the mechanical properties of the materialare guaranteed, especially, the toughness of the material is improved to some extent.

Description

technical field [0001] The invention relates to a low-gloss, scratch-resistant polypropylene composite material that can be used for automotive interior parts and a preparation method thereof. It is mainly used for automotive interior parts and belongs to the technical field of polymer modification and processing. Background technique [0002] With the rapid development of the automobile industry, polypropylene, the largest variety of automotive plastics, has been widely used in interior and exterior trims such as bumpers, instrument panels, door panels, and pillars. With the development of the application of polypropylene composite materials for vehicles, it has been found that parts made of polypropylene composite materials have high gloss, especially for automotive interior parts, which may be related to the characteristics of the mold texture. At the same time, it may also increase the gloss of the mold itself as the number of molded parts increases, resulting in an incr...

AI Technical Summary

Problems solved by technology

With the development of the application of polypropylene composite materials for vehicles, it has been found that parts made of polypropylene composite materials have high gloss, especially for automotive interior parts, which may be related to the characteristics of the mold texture. At the same time, it may also increase the gloss of the mold itself as the number of molded parts increases, resulting in an increase in the gloss of the prepared parts.

For exposed automotive interior parts, the high gloss of the parts will bring strong light reflection, which will affect the comfort and safety of the driver and passengers in the car

[0003] At the same time, the surface hardness of polypropylene material is low, and its own scratch resistance is average. The product surface of some exposed automotive interior parts made of polypropylene composite material is easily scratched, which affects the quality of the product, especially for some products that are sensitive to the surface of the product. Texture decorations with high scratch performance requirements, such as some complex rough leather textures, geometric leather textures, special color decorations, laser 3D texture decorations, these more special decorations have a greater impact on the scratch resistance of polypropylene composites high requirements

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