Long glass fiber reinforced polypropylene material and preparation thereof

Abstract

The invention provides a long glass fiber reinforced polypropylene material and a preparation method thereof. The mass ratio of the material components is: 35 percent to 55 percent of polypropylene, 35 percent to 50 percent of long glass fibers, 0.3 percent to 0.8 percent of coupling agents, 5 percent to 10 percent of compatilizers, 2 percent 4 percent of flow modifiers, 0.3 percent to 0.6 percent of antioxidants and 1 percent to 2 percent of lubricants. The invention has the process that the polypropylene, the flow modifiers, the compatilizers, the antioxidants and the lubricants are mixed firstly, then the mixture is added into a double screw extruder, and the processing temperature is 180 DEG C to 230 DEG C; a molten bath is formed by extruding melts from the extruding die of the extruder; the continuous long glass fibers are preheated for drying, and the surfaces of the long glass fibers are processed; later, a soakage device is introduced to lead a plurality of strands of the long glass fibers into the molten bath so that the long glass fibers are completely soaked and then is bundled to be packaged, and finally, the long glass fibers are discharged from a bell-mouthed die head outlet to be cooled and cut into granules to obtain the long glass fiber reinforced polypropylene granule materials. The invention has simple and practical process and favorable product performance.

Description

technical field [0001] The invention relates to glass fiber reinforced plastics, in particular to a long glass fiber reinforced polypropylene material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Glass fiber reinforced plastic is a lightweight high-strength engineering structural material. Its tensile, flexural modulus, creep resistance, and fatigue resistance are much better than those of non-reinforced plastics. The main reason is that when an external force acts, the load is transmitted through the fiber, and the fiber has good mechanical properties. In Western Europe, about 50% of fiber-reinforced plastics are used in the automotive industry, and in the United States about 30%. Long glass fiber reinforced thermoplastics (LFRT) have excellent rigidity, toughness, warpage resistance and UV stability, and are less expensive than ABS and engineering plastics. Because the average length of the fibers ...

AI Technical Summary

Problems solved by technology

[0004] At present, in the production of LGFPP, the impregnation effect of glass fiber in polypropylene matrix is ​​not ideal for most products, and the dispersion and orientation of glass fiber in polypropylene also have certain defects, resulting in unsatisfactory performance of the product, and the mechanical properties still need to be improved. There will also be glass fiber exposure

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