Wear-resistant, noise-reducing and thin-walled polypropylene composite material and preparation method thereof

Abstract

The invention discloses a wear-resistant, noise-reducing and thin-walled polypropylene composite material and a preparation method thereof. The wear-resistant, noise-reducing and thin-walled polypropylene composite material comprises the following raw materials in parts by weight: 59-79 parts of polypropylene; 8 to 16 parts of talcum powder; 6-10 parts of an elastomer; 4 to 12 parts of a functional master batch; 0-1 part of an antioxidant and 0-3 parts of other auxiliary agents; the ultrahigh molecular weight polyethylene in the functional master batch has unique self-lubricating, wear-resisting and impact-resisting properties, so that the wear-resisting, impact-resisting and other mechanical properties of the thin-walled polypropylene composite material are remarkably improved by adding the ultrahigh molecular weight polyethylene; the functional master batch takes high-fluidity polypropylene as a carrier; when the polymer system is extruded from a twin-screw extruder or an injection molding machine, nano silicate can be well and uniformly dispersed into a composite material system, a unique chain layer structure of the nano silicate plays a role in dissipating sound transmission,and meanwhile, the nano silicate and ultra-high molecular weight polyethylene in the functional master batch generate a synergistic effect to ensure that the prepared composite material has excellentsound absorption and noise reduction functions.

Description

technical field [0001] The invention belongs to the technical field of polymer modification and processing, and relates to a wear-resistant, noise-reducing, thin-walled polypropylene composite material and a preparation method thereof. Background technique [0002] As one of the lightweight technologies for automobiles, thin-walled polypropylene composite materials have been widely used in interior and exterior trims such as automobile pillars, door panels, instrument panels, and bumpers. Due to its relatively poor rigidity and poor sound-absorbing effect, polypropylene materials are prone to wear, abnormal noise, and noise phenomena during use. They generally appear on the surface of exposed parts of automotive interiors and the vibration and friction parts of two matching parts. This is easy cause discomfort to consumers. [0003] At present, there are some reports on the improvement of the wear resistance and noise reduction performance of materials. For example, in the ...

AI Technical Summary

Problems solved by technology

Due to its relatively poor rigidity and poor sound-absorbing effect, polypropylene materials are prone to wear, abnormal noise, and noise phenomena during use. They generally appear on the surface of exposed parts of automotive interiors and the vibration and friction parts of two matching parts. This is easy cause discomfort to consumers

[0003] At present, there are some reports on the improvement of the wear resistance and noise reduction performance of materials. For example, in the patent CN107488301A, it is mentioned that aluminum oxide is used as an abrasion resistant agent to improve the wear resistance of polypropylene, but the density of aluminum oxide is relatively high. , which is unfavorable to the lightweight of automobiles; in patent CN103756132A, high molecular weight siloxane is used to improve the wear resistance of polypropylene, which has high cost, no noise reduction effect, and general wear resistance, which is not conducive to the application and development of products; patent Molybdenum disulfide and polytetrafluoroethylene are used to improve the wear resistance of polypropylene in CN1990534A, but molybdenum disulfide is black, which will limit its application in light-colored products; it is mentioned in the patent CN109867864A that a nano-filler is used to improve the wear resistance of polypropylene. Sound-absorbing and noise-reducing properties of polypropylene composite materials; patent CN109749388A mentions the use of a new type of polyethylene grafted noise-reducing agent to improve the sound-absorbing and noise-reducing properties of PC / ABS materials

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