LDPE (Low-density polyethylene)/EVA (ethylene-vinyl acetate copolymer)/SBR (styrene butadiene rubber) composite foam material and preparation method thereof

Abstract

The invention discloses an LDPE (low-density polyethylene) / EVA (ethylene-vinyl acetate copolymer) / SBR (styrene butadiene rubber) composite foam material. The foam material is prepared from the following raw materials in parts by weight: 80-100 parts of LDPE, 30-40 parts of EVA, 20-30 parts of SBR, 10-20 parts of talcum powder, 10-15 parts of nanometer celestite powder, 2-3 parts of bis(dioctyl pyrophosphate) ethylene titanate, 1-2 parts of anilino-methyl-triethoxysilane, 5-10 parts of magnesium hydroxide, 5-8 parts of azodicarbonamide, 5-8 parts of dioctyl maleate, 1-1.5 parts of benzoyl peroxide, 2-3 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of dioctyltin bis(isooctylmercaptoacetate), 2-3 parts of chlorinated polyethylene, 3-5 parts of modified wood ash, 1-2 parts of ultraviolet light absorber UV-360 and 2-3 parts of antioxidant 246. The produced LDPE foam material is light and soft, has high strength, good resilience, an ideal foaming effect, uniform, fine and dense pores and good flame retardance, is resistant to chemical corrosion and aging and is durable in use.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to an LDPE / EVA / SBR composite foam material and a preparation method thereof. Background technique [0002] Low-density polyethylene foam has excellent physical, chemical and mechanical properties. It is tough, flexible, wear-resistant, has excellent electrical insulation, heat insulation and chemical resistance, and is widely used in many fields such as packaging, chemical industry, and construction. However, at present, low-density polyethylene foaming materials still have shortcomings such as low strength, poor resilience, and uneven cells. Therefore, one of the development directions of low-density polyethylene foaming materials is to develop soft, high-flexibility, high-strength materials. , a closed-cell foam grade with uniform cells, small and dense, and at the same time, various fields also put forward corresponding requirements for the flame retardancy...

AI Technical Summary

Problems solved by technology

However, at present, low-density polyethylene foaming materials still have shortcomings such as low strength, poor resilience, and uneven cells. Therefore, one of the development directions of low-density polyethylene foaming materials is to develop soft, high-flexibility, high-strength materials. , uniform cells, small and dense closed-cell foam grade, at the same time, various fields also put forward corresponding requirements for the flame retardancy of plastic materials