Long glass fiber composite polyoxymethylene composite material and preparation method thereof

Abstract

The invention discloses a long-glass-fiber composite material composited with polyoxymethylene. The composite material consists of the following components: polyoxymethylene, a stabilizer, an absorbent, a flexibilizer, a compatilizer, a lubricating agent, a filling agent, and high-strength long glass fibers, wherein the absorbent refers to a polyoxymethylene absorbent and contains the raw materials of glycerin, phosphoric acid and hydroxyethyl cellulose. Blending modification is performed by virtue of the excellent properties of polyoxymethylene, so that the mechanical properties of the composite material is further enhanced and consequently the composite material can substitute for metal materials such as iron, copper zinc and aluminum to manufacture various parts; the high-strength long glass fibers are utilized for reinforcing the composite material, enhancing the rigidity of the composite material and prolonging the service life of the composite material; the composite material without floating fibers has an excellent dispersing effect; substances of a mixed system can be evenly dispersed; the thermostability is good and the processing range is wide; the composite material has the properties of saving energy, protecting environment, comprehensively utilizing resources, and being low in cost, recyclable, good in mechanical performance, flame-retardant, durable and the like.

Description

technical field [0001] The invention relates to a composite material, in particular to a long glass fiber composite polyoxymethylene composite material and a preparation method thereof. Background technique [0002] Polyoxymethylene is also known as POM (polyoxymethylene): the English name Polyoxymethylene, commonly known as Saiban. It is to use POM plastic particles to extrude through the extruder at high temperature, and extrude through the corresponding die mouth to obtain plates with different thicknesses. It is a thermoplastic engineering plastic with high melting point and high crystallinity. Due to the good characteristics of the POM board, it is very suitable for machining on automatic lathes, especially for the manufacture of precision parts. In recent decades, the glass fiber reinforced composite material industry has developed vigorously, covering almost every field of rigid material application. Because POM has low relative density, good impact strength, dynam...

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Problems solved by technology

However, in the existing technology for the reinforcement modification of POM, due to the high crystallinity of POM, it is difficult to achieve good compatibility between resin and glass fiber, and glass fiber as a POM reinforcement material has low precision in proportion to POM, glass The dispersion of the fibers is poor and the reinforcement effect is poor, so the fibers generally use chopped strands, such as the Chinese patent "CN101343396B" and the Chinese patent "CN101759957A" discloses a reinforced high wear-resistant polyoxymethylene composition, which uses long glass non-alkali glass fiber, but the composition still has defects such as easy generation of floating fibers, poor dispersion effect, poor thermal stability, narrow processing range, and inability to uniformly disperse substances in the mixed system.

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