A kind of high-toughness pp composite material replacing abs and its preparation method

Abstract

The invention belongs to the field of polymeric materials, and particularly relates to an ABS-substituting high-toughness PP composite material and a preparation method thereof. The ABS-substituting high-toughness PP composite material comprises the following raw materials in percent by weight: 22-25% of low-shrinkage rate PP resin, 30-41% of high-impact copolymerized PP resin, 3-5% of a toughener, 32-40% of talcum powder and 1-2% of an auxiliary agent. The invention further provides a preparation method of the ABS-substituting high-toughness PP composite material. The preparation method particularly comprises the following steps: uniformly mixing the raw materials according to the percent by weight by stirring at a high speed, and then performing melting extrusion in a twin-screw extruder to obtain the ABS-substituting high-toughness PP composite material. The PP composite material provided by the invention has shrinkage rate and notch impact strength which are similar to those of an ABS material, and has toughness higher than that of the ABS material, which makes up a defect that the ABS material is poor in toughness; the PP composite material provided by the invention can substitute the ABS material for injection moulding, and during injection moulding, an original mould which uses the ABS material as an injection moulding material can be used and is not required to be redeveloped and modified, so that the cost is effectively reduced and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a high-toughness PP composite material replacing ABS and a preparation method thereof. Background technique [0002] ABS resin is widely used in household appliances, sanitary ware and automobile industries, because of its excellent comprehensive mechanical properties and bright surface, it can be used to make spray-free shells. However, with the rise of high-gloss PP, the heat resistance is better than ABS, and the gloss is good. Most of them have replaced ABS as the shell material, resulting in a decline in the price of ABS and entering into other plastic parts that do not require high gloss. Widely used, so ABS has become a general-purpose plastic. [0003] Although the notched impact strength of ABS is high, its elongation at break is low and its toughness is poor. In actual production, developers will encounter such a problem: the ABS parts produced by the deve...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-toughness PP composite material that can replace ABS and a preparation method thereof, so as to overcome the disadvantages of poor toughness of ABS materials or high-gloss high-modulus PP materials in the prior art, and the PP composite material can be Directly replace ABS material for injection molding without redeveloping or modifying the mold, and the size of the obtained parts meets the assembly requirements, and can pass the falling ball impact test

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