Low-gloss low-warpage soft-touch-feeling vehicle polypropylene composition as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of high-molecular polypropylene materials, and discloses a low-gloss low-warpage soft-touch-feeling vehicle polypropylene composition as well as a preparation method and application thereof. The composition comprises the following components in percentage by mass: 20-48 percent of polypropylene, 30-40 percent of an elastomer, 20-30 percent of filler, 1-10 percent of a compatilizer and 0.01-1 percent of a processing aid, wherein the polypropylene is copolymerized polypropylene, and the melt flow rate MFR is larger than 60g / 10min; the melt flow rate MFR of the elastomer is smaller than 0.5g / 10min. By limiting the melt flow rate of the raw materials such as the used polypropylene and elastomer and controlling the ratio of the used raw materials, the obtained composition product is extremely low in glossiness, flat, free of warpage, soft in hand touch feeling, balanced in toughness and capable of being widely applied to various fields, especially automotive trim products.

Description

Technical field [0001] The invention belongs to the technical field of polypropylene polymer materials, and particularly relates to a low-gloss, low-warpage, soft-touch polypropylene composition for vehicles and its preparation method and application. Background technique [0002] With the requirements of the aesthetic design of automobile interiors, it is proposed that automobile interiors need low gloss, reduce the plastic feel, enhance the texture of genuine leather, and give people a "soft" feeling visually and tactilely. Take the dashboard of automobile interior parts as an example. Hard dashboards, that is, PP injection molding, are often used in economical models or tough SUVs, but the surface of the material has high gloss and a strong plastic feel. Soft foam instrument panels are often composed of soft skin + foam core material + skeleton, giving a soft texture and suitable for warm and luxurious interior styles. However, this molding method is complex and expensiv...

AI Technical Summary

Problems solved by technology

However, due to the use of high-gloss homopolypropylene and elastomers with high melt rates, low-gloss products cannot be obtained

[0005] Chinese patent CN 103254498 A discloses a low-gloss polypropylene composition, which comprises 10 parts of polypropylene, 1-6 parts of matting masterbatch containing mineral powder, 1-5 parts of toughening agent and chopped glass fiber 1 to 2 parts, the composition is suitable for injection molding of matt plastic parts. After molding, it has the characteristics of low gloss, high strength, and good toughness. Since the gloss of the product is reduced by glass fiber and mineral powder, it can be used in the presence of density. Automotive products applications requiring

[0006] The above-mentioned existing technologies and researches all fail to meet the needs of the market, and cannot balance and simultaneously realize multiple properties such as low gloss, low warpage, and soft touch. Tactile automotive polypropylene compositions are in urgent market demand

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