Low-floating-fiber continuous long glass fiber reinforced polypropylene composite material and preparation method and application thereof

Abstract

The invention discloses a low-floating-fiber continuous long glass fiber reinforced polypropylene composite material and a preparation method and application thereof. The material is prepared from thefollowing raw materials in parts by weight: 40-80 parts of polypropylene, 30-60 parts of continuous glass fibers, 1-10 parts of a compatibilizer, 0.1-1.5 parts of an antioxidant, 1-10 parts of polybutene, 0.1-3 parts of a lubricant, and 0.5-5 parts of hollow glass beads. With a manner of compounding the hollow glass beads and polybutylene, not only is the characteristic that polybutylene reachesthe surface of a mold first through shear thinning utilized, but also the problem of dispersion difficulty of continuous long glass fibers is solved by improving the fluidity of polypropylene throughthe properties of the lubricant and the hollow glass beads, thereby further solving the problems that influence the appearance such as floating fiber, glass fiber agglomeration and flow marks on the surface of a workpiece made of the continuous long glass fiber reinforced polypropylene material.

Description

technical field [0001] The invention relates to the field of polypropylene composite materials, in particular to a low floating fiber continuous long glass fiber reinforced polypropylene composite material and its preparation method and application. Background technique [0002] The continuous long glass fiber reinforced polypropylene composite material (LGF-PP) has the mechanical properties that short fiber reinforced polypropylene is difficult to achieve, and its high tensile, bending strength and modulus have implemented the general plastic engineering of polypropylene, which has been used in It has been widely used in the field of automobile manufacturing and has become an ideal material for the automobile industry to achieve the goal of low cost and high benefit. It is currently one of the most active composite material development varieties in the world. With the continuous promotion and application of automobile lightweight, the demand for more lightweight automobile ...

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Problems solved by technology

[0004] The Chinese invention patent application with the publication number CN105273316 A discloses a low-float long glass fiber and a high-impact PP composite material containing the long glass fiber. The components of the glass fiber reinforced polypropylene material are as follows: 50-90 parts of PP, 0.2-0.5 parts of grafted polypropylene, 0.5-1.3 parts of POE elastomer, 0.1-0.7 parts of antioxidant, 5-10 parts of low floating fiber long glass fiber, 1-4 parts of ethylene bis stearamide , this technical solution prepares low-floating fiber composite materials by co-extruding pretreated glass fibers with PP and other additives. The content of glass fibers used is relatively low. fiber effect

[0005] The Chinese invention patent application with the publication number CN106750949 A discloses a high-gloss low-floating fiber reinforced polypropylene material for household appliances and its preparation method. The components of the material are: 38-48 parts of polypropylene, nano 5-10 parts of calcium carbonate, 15-30 parts of glass fiber, 10-30 parts of polybutene, 3-5 parts of compatibilizer, 0.1-0.3 parts of silane coupling agent, 0.2-1 part of antioxidant, lubricant 0.5 to 1 part, 1 to 2 parts of silicone masterbatch, the glass fiber reinforced polypropylene composite material obtained by this technology has low glass fiber addition, relatively low performance, and cannot be used in the automotive field

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