Anti-scratching polypropylene composite material and preparation method thereof

Abstract

The invention relates to an anti-scratching polypropylene composite material and a preparation method thereof. The formula of the composite material comprises the following components in percentage by weight: 55 to 95 percent of polypropylene, 1 to 30 percent of aedelforsite, 0 to 30 percent of inorganic filler, 0 to 30 percent of toughening agent, 0.1 to 1 percent of main antioxidant, 0.1 to 1 percent of auxiliary antioxidant, 0 to 1 percent of anti-scratching agent, 0.1 to 2 percent of light stabilizer and 0 to 5 percent of other auxiliary agent. By adding the needle-like or needle-like crystal aedelforsite powder into the processing formula of the polypropylene material, the anti-scratching performance of the material can be effectively improved, the mechanical property of the material is improved, and meanwhile, other using properties of the material are not affected. In the preparation process of the polypropylene material, the aedelforsite powder is fed into an extruder from a second feeding hole in a lateral feeding form and extruded, so the structure of the aedelforsite can be prevented from being damaged by long-time mixing; and the processing method is skilful in design and simple in operation, can further ensure the anti-scratching performance of the material, and can also improve the mechanical property of the material.

Description

technical field [0001] The invention relates to a scratch-resistant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is currently one of the most widely used general-purpose plastics because of its low density ((0.89-0.91g / cm 3 ), low price, non-toxic, corrosion resistance, excellent electrical insulation performance, transparency and good processability, etc., are widely used in chemical industry, machinery, electric power, transportation and other industries. Among them, the application of polypropylene materials in automobiles has become one of the main research directions for the localization of auto parts in my country. One of the disadvantages of polypropylene material is poor scratch resistance, which is a key performance for automotive interior applications such as instrument panels, consoles and door skins. In addition, scratch resistance is also a key performance for automotive exterior applications, A...

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Problems solved by technology

The problems of this method are as follows: On the one hand, due to the characteristics of small grains and large surface curvature of nanomaterials, the number of atoms arranged in disorder on the surface of grains is much larger than the percentage of surface atoms in crystalline materials, and in There are also various defects in the same nano-state grain, which makes it easy to agglomerate at room temperature; on the other hand, since polypropylene is a non-polar high polymer, and the polarity of nanoparticles is relatively different, the nanoparticles The compatibility with polypropylene is also poor, and it is difficult to directly fill polypropylene with untreated nanoparticles into high-performance polypropylene materials

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