Method for preparing glass fiber and reinforced polypropylene fiber composite material

Abstract

The invention relates to a method for preparing a glass fiber and reinforced polypropylene fiber composite material. The method comprises a non-weaving process in pre-procedure and a thermal pressing and molding process in post-procedure; the non-weaving process in pre-procedure comprises the following steps of: weighing polypropylene fibers and glass fibers in proportion, loosening the fibers by a coarse opener, then conveying to a blending box by a cotton conveying blower, conveying to a fine opener, a vibrating cotton box and a big cotton bin, sufficiently mixing the fibers by means of a conveying curtain, an inclined curtain and a picker roller beater, outputting to a carding machine by a cotton pressing roller and an output curtain, lapping by a lapping machine, conveying the fiber mesh by a feeder to a pre-needling machine for pre-needling operation, and setting and needling into a felt material by using a main needling machine; and the thermal pressing and molding process in post-procedure comprises the following steps of aligning and unreeling, powdering, deviation correction, open-width feeding, heating of a drying room, thermal pressing and compounding, rolling and cooling, and air-cooling. The method for preparing the glass fiber and reinforced polypropylene fiber composite material has the advantages of stronger tensile strength and impact resistance performance, capability of satisfying the usage requirements in the high-load defending parts of automobiles and ships and the like, and wide application range.

Description

technical field [0001] The invention belongs to the technical field of polypropylene (PP) fiber composite materials used in industrial production, and in particular relates to a preparation method of glass fiber reinforced polypropylene fiber composite materials. Background technique [0002] Glass fiber reinforcement is one of the methods with the lowest cost and the most obvious improvement effect in the form of plastic reinforcement. The physical and mechanical properties of plastics can be improved by adding glass fibers. However, the injection molding and extrusion processes of conventional plastics can only achieve the filling and reinforcement of ultra-short glass fibers (length less than 0.95mm), while long glass fibers (length not less than 50mm) with better tensile strength and impact resistance ) but cannot be added to the sheets required for the design and production of automobiles, ships, etc. under the traditional process, thus limiting the application range of...

AI Technical Summary

Problems solved by technology

However, the injection molding and extrusion processes of conventional plastics can only achieve the filling and reinforcement of ultra-short glass fibers (length less than 0.95mm), while long glass fibers (length not less than 50mm) with better tensile strength and impact resistance ) but cannot be added to the sheets required for the design and production of automobiles, ships, etc. under the traditional process, thus limiting the application range of existing fiber reinforced materials

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