Light noise-reducing modified polypropylene material and preparation method thereof

Abstract

The invention relates to a light noise-reducing modified polypropylene material and a preparation method thereof. The material is prepared from the following raw materials in percentage by weight: 39 to 93.5 percent of polypropylene, 5 to 45 percent of inorganic filler, 1 to 10 percent of dispersing agent, 0.3 to 5 percent of coupling agent and 0.2 to 1 percent of antioxidant, wherein the inorganic filler is hollow inorganic particles. By adding the hollow particle inorganic filler into the material, the mechanical properties of the material are improved and the low density of the material is kept; meanwhile, due to the special structure of the hollow particles, the material has certain noise reducing function, and has high application value for lightening automobiles, damping and reducing noise. In addition, the light noise-reducing modified polypropylene material is prepared by introducing the inorganic filler into a screw extruder through a plurality of lateral feeding holes at different positions and performing extrusion, so that the hollow structure of the inorganic filler is not easy to break when the inorganic filler is subjected to melt extrusion, the inorganic filler can be more uniformly dispersed in a matrix, and the prepared material has better performance.

Description

technical field [0001] The invention relates to a lightweight noise-reducing modified polypropylene material and a preparation method thereof, which can be applied in the field of automobile manufacturing. Background technique [0002] In the plastic modification industry, inorganic minerals such as talcum powder, mica, calcium carbonate, glass beads, wollastonite, glass fiber, etc. are generally used as filling and reinforcing components, and the polypropylene (PP) is improved by blending modification. ) The rigidity, heat resistance, molding shrinkage and other properties of the material to meet the use requirements of the final plastic product. However, since the density of these inorganic mineral fillers is often higher than that of plastics, adding mineral fillers to plastics will relatively increase the weight of the final product (see Table 1 for the effect of inorganic mineral filler content on the density of polypropylene materials). [0003] Nowadays, non-renewabl...

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Problems solved by technology

However, since the density of these inorganic mineral fillers is often higher than that of plastics, adding mineral fillers to plastics will relatively increase the weight of the final product (see Table 1 for the impact of inorganic mineral filler content on the density of polypropylene materials)

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