Glass fiber reinforced polypropylene material used for thin-wall injection molding and preparation method of glass fiber reinforced polypropylene material

Abstract

The invention relates to a glass fiber reinforced polypropylene material used for thin-wall injection molding. The glass fiber reinforced polypropylene material comprises the following components (inpercentages by mass): 41-47% of polypropylene resin, 4.5-8% of an amorphous polyolefin, 18-22% of modified glass fibers, 12.5-16.2% of a polyolefin elastomer, 7.7-11% of ternary copolymer polypropylene, 4-6% of styrene-butadiene transparent impact-resistant resin, 0.1-0.5% of a main antioxidant, and 0.3-0.8% of an auxiliary antioxidant, wherein the cross section of the glass fibers is elliptical.At the same time, the invention also relates to a method of preparing the material. The surface of a component prepared from the material provided by the invention has no floating fibers, low warpage,no gas mark and no tiger skin stripes, and the component has good mechanical properties; at the same time, the elliptical cross section of the glass fibers reduces orientation of the glass fibers andreduces anisotropy of the glass fibers, so that the problem of warpage deformation of the glass fiber reinforced polypropylene material is improved, and the mechanical properties of the material areimproved; and the glass fibers have better compatibility with the polypropylene material after being modified by hydrofluoric acid, the glass fibers and the polypropylene material are more tightly combined, so that the mechanical properties of the prepared finished product are improved.

Description

technical field [0001] The invention relates to the field of polypropylene materials, in particular to a glass fiber reinforced polypropylene material for thin-wall injection molding and a preparation method thereof. Background technique [0002] Thin-wall injection molding of plastic parts has thinner walls, which can save raw materials and reduce production costs on the one hand, and on the other hand can improve production efficiency and reduce the weight of plastic parts, which has become the main development trend of auto parts processing. In the process of thin-wall injection molding, it is necessary to increase the injection pressure and injection speed in a short time to avoid the solidification of the melt before filling is completed. In addition, the thickness of the plastic part becomes thinner after thin-wall injection molding, which reduces the rigidity of the material. Therefore, it is necessary to A polypropylene composite material with high fluidity and certa...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN102816384B discloses a glass fiber reinforced polypropylene composite material with shallow sink marks and low warpage and its production method and application. It uses high crystallinity polypropylene and chopped glass fibers, although it can reduce shrinkage to a certain extent. scratches, but it is easy to cause glass fiber exposure

Chinese patent CN100569842C discloses a kind of polypropylene resin composition and preparation method thereof, has used petroleum resin modifier and ft pear alcohol type nucleating agent, and silicon dioxide is used as inorganic additive, and the product of this invention has obtained better For transparent polypropylene resin, its haze can be reduced to less than 10, and its mechanical properties can also achieve relatively good results, but its fluidity needs to be improved

Images