Low-shrink continuous polypropylene fiber and preparation method

Abstract

The invention relates to a low-shrink continuous polypropylene fiber and a preparation method. The polypropylene fiber comprises, by mass, 93-95% of polypropylene, 3-5% of functional polypropylene, 1-2% of a smooth master batch and 0.01-0.5% of talcum powder. The preparation method of the polypropylene fiber includes the steps of firstly, weighing the raw materials according to a ratio of claim 1,and then performing extrusion granulating for use; and secondly, adding granulated granules into a single-screw extruder, performing extruding through a spinneret plate to form filaments, and directly winding the filaments to form the continuous fiber without thermal stretching. By studying a formula and consumption, the product quality problem caused by shrinkage of the polypropylene fiber in the thermal treatment process of a blend fiber is reduced.

Description

technical field [0001] The invention belongs to the manufacturing technology of structural materials, and in particular relates to a low-shrinkage continuous polypropylene fiber and a preparation method thereof. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. Its excellent insulation, heat resistance, corrosion resistance and high mechanical strength make it indispensable for construction, transportation, electrical, chemical, environmental protection, national defense and other industries. less raw material. Although glass fiber is more brittle than other high-performance fibers, such as carbon fiber, aramid fiber, ceramic fiber, etc., due to its production process and price advantages, the use of glass fiber as a reinforcing material is still a polymer matrix composite material. The first choice, the occupancy is above 98%. In glass fiber / polymer matrix composites, glass fiber reinforced polypropylene (PP) is th...

AI Technical Summary

Problems solved by technology

Traditional glass fiber-reinforced polypropylene uses an extruder to mix glass fiber into polypropylene resin, and then produces products through injection molding. The glass fiber is distributed in the polypropylene matrix with a length of about 0.1mm, and the glass fiber content is usually low. Such reinforced materials cannot meet the requirements of structural materials in terms of strength, toughness and rigidity.