Fibrilia for plastic reinforcing and method for manufacturing the same

Abstract

The present invention discloses a fibrilia for plastic reinforcing and a method for manufacturing the same. The fibrilia contains the following components in part by weight: 100 chopped fibrilias, 0.1 to 100 fibrilia agents, 1 to 10 functional polyolefins, 0.1 to 10 coupling agents and 0.1 to 0.5 antioxygens. The method comprises the steps of: cutting off the chopped fibrilias; immersing the cut chopped fibrilias into a sodium hydroxide solution and stirring the solution; washing out the chopped fibrilias after taking out them from the solution; drying the obtained chopped fibrilias; then immersing the dried chopped fibrilias into solution with the fibrilia agents; drying to obtain the chopped fibrilias with surface treatment; adding the chopped fibrilias, the coupling agents, the functional polyolefins and the antioxygens into a preheated kneader in order; and stirring to obtain the fibrilia for plastic reinforcing. The chopped fibrilias manufactured by the present invention has goodcolor, good rigidity, good heat resistance, and good compatibility with the plastic, thus the chopped fibrilias can be used for manufacturing chopped fibrilias / plastic composite materials with high performance, and can play a reinforcing role in plastic substrates.

Description

technical field [0001] The invention belongs to the technical field of natural fiber composite materials and wood-plastic composite materials, and specifically refers to a hemp fiber for plastic reinforcement and a preparation method thereof Background technique [0002] In recent years, research on natural plant fiber composites and wood-plastic composites is in the ascendant. On the one hand, due to the wide range of sources of natural plant fibers, the price is low; on the other hand, in terms of performance, natural plant fiber-reinforced plastics tend to replace mineral fiber-reinforced plastics. [0003] Most natural plant fibers are made of long fibers or woven into fiber mats and then hot-pressed with thermosetting resins. They cannot be directly added to thermoplastics for injection molding like glass fibers; on the one hand, natural plant fibers are rich in hydroxyl groups on the surface , shows strong polarity and hydrophilicity, has poor compatibility with non-p...

AI Technical Summary

Problems solved by technology

Coupling agents mostly use less liquid and are not easy to disperse evenly into plant fibers, which affects their coupling effect. Industrial applications require special equipment for processing; most grafts or copolymers of maleic anhydride and polyolefin are particles It is easy to disperse into plastics and plant fibers, but its low grafting rate makes it difficult to improve interfacial adhesion

However, composites filled with a large amount of plant fibers and plastics also pose processing difficulties, making extrusion or injection molding difficult

In order to solve the processing problems of plant fiber and plastic composite materials, various processing aids appear, such as olefin wax, amide wax, stearic acid, zinc stearate, calcium stearate, etc., but the addition of too many processing aids It will also degrade the performance of the composite material

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