Halogen-free flame-retardant insulating material for durable household appliances and preparation method thereof

Abstract

The invention relates to a halogen-free flame-retardant insulating material for durable household appliances, which is prepared from the following raw materials in parts by weight: 4 to 5 parts of thermoplastic polyurethane elastomer rubber, 1 to 2 parts of alkali lignin, 2 to 3 parts of urea-formaldehyde resin, 1 to 1.5 parts of melamino-formaldehyde resin, 6 to 7 parts of low-density polyethylene resin, 0.3 to 0.4 part of vinyl trimethoxy silane, 0.04 to 0.08 part of dicumyl peroxide, 0.01 to 0.02 part of di-n-butyltin dilaurate, 50 to 60 parts of magnesium hydroxide, 60 to 65 parts of an ethylene vinyl acetate copolymer (EVA), 20 to 23 parts of high-density polyethylene resin and 1 to 1.5 parts of an antioxidant 1010. The insulating material provided by the invention is prepared from the thermoplastic polyurethane elastomer rubber, the alkali lignin and the urea-formaldehyde resin through reaction modification, so that the insulating material has excellent abrasive resistance and ozone resistance, high hardness, high strength, high elasticity, low-temperature resistance, excellent oil resistance, chemical resistance and environment resistance, and has excellent hydrolysis stability in damp environments. The insulating material is applicable to wire harness of household appliances such as refrigerators, air conditioners and the like.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a halogen-free flame-retardant insulating material for durable household appliances and a preparation method thereof. Background technique [0002] Halogen-free flame retardant of cable materials is a research hotspot in the field of flame retardant of cable materials in recent years, but due to the low flame retardant efficiency of halogen-free flame retardants and poor compatibility with the matrix, halogen-free flame retardant cable materials generally have poor mechanical properties. Problems make it difficult to popularize and apply halogen-free flame-retardant cable materials. Ethylene-vinyl acetate copolymer (EVA) is a new darling in the field of plastics for wire and cable. It has good flexibility, impact resistance, and environmental stress cracking resistance in a wide temperature range. EVA is used as a cable material matrix to It performs halogen-free flame retardant, ...

AI Technical Summary

Problems solved by technology

[0004] At present, the cable materials on the market are not resistant to scratches, not resistant to folding, and there are white marks on the surface of the cable after folding or collision, poor aging resistance, poor water resistance, oil resistance, and wear resistance, which affect the use of home appliances. Safety and service life, need further improvement