In-situ self-enhanced polyformaldehyde/polyethylene composite material and preparation method

The invention discloses an in-situ self-enhanced polyformaldehyde/polyethylene composite material. The in-situ self-enhanced polyformaldehyde/polyethylene composite material comprise 70-100 parts of polyethylene, 10-30 parts of polyformaldehyde and 0.05-1 parts of ethylene glycol monomethyl ether. During preparation, the three raw materials are added onto a double-screw extrusion and granulation machine and subjected to extrusion and granulation, the prepared blended material grains are dried in a drying box, and finally the dried material grains are injected to obtain the in-situ self-enhanced polyformaldehyde/polyethylene composite material. The in-situ self-enhanced polyformaldehyde/polyethylene composite material disclosed by the invention is capable of improving the mechanical property of a polyethylene material, and avoiding the problems of the viscosity increment of a resin base, the reduction of the flowing property and the increase of the processing cost, which are caused by adding macroscopic fibres such as glass fibres, the sharp degradation of the material performance of a polymer, due to the breakages of the fibres during waste recycling, and the like. The material preserves a good impact performance while the rigidity is improved.