Composite material used for blow moulding and having environmental stress cracking resistance and preparation method thereof

Abstract

The invention discloses a composite material used for blow moulding and having environmental stress cracking resistance and a preparation method thereof. The composite material includes the raw materials in parts by weight: 50-70 parts of linear low density polyethylene, 30-45 parts of high density polyethylene, 8-12 parts of an ultraviolet absorbent, 1-2 parts of an antioxidant, 10-20 parts of anethylene-vinyl acetate copolymer, 4-5 parts of a thermoplastic elastomer, 2-3.5 parts of chlorinated polyethylene, 1-3 parts of a barium-zinc stabilizer, 4-10 parts of a plasticizer, 4-8 parts of a fiber reinforced filler, 2-4 parts of a silane coupling agent, 3-7 parts of a degradant, 2-4 parts of a reinforcing agent, and 3-5 parts of an adhesive. The method includes the steps: adding all the components into a high-speed mixer, stirring and then transferring into a low-speed mixer, stirring and cooling down, then transferring into a twin-screw extruder, carrying out melt blending extrusion,carrying out mold shaping and carrying out pressure-holding cooling, and then demoulding to take the product. The composite material has excellent environmental stress cracking resistance, toughness,fire resistance and chemicals resistance on the basis of meeting the hardness required for use, and has the advantages of low investment cost, safety and environmental protection.

Description

technical field [0001] The invention relates to a composite material for blow molding with resistance to environmental stress cracking and a preparation method of the composite material. Background technique [0002] Environmental stress cracking refers to the cracking of plastic resin under the synergistic effect of environmental factors and stress factors. When the molded plastic product is under stress, it will be very easy to contact with some active media (such as detergent, acid, alkali or organic solvent). Brittle cracks appear and eventually cause the plastic product to break. In the prior art, plastic products can be seen everywhere, whether they are widely used in industry, agriculture or packaging fields, but the existing plastic products are usually made of low-density polyethylene resin as the main raw material, combined with other additives after melting It is made by kneading. It is prone to deformation or even cracking when it is subjected to external force ...

AI Technical Summary

Problems solved by technology

In the prior art, plastic products can be seen everywhere, whether they are widely used in industry, agriculture or packaging fields, but the existing plastic products are usually made of low-density polyethylene resin as the main raw material, combined with other additives after melting It is made by kneading. It is prone to deformation or even cracking when it is subjected to external force or contacting some active media during actual use. The service life is short. The problem