Low smoke zero halogen flame-retardant mould shrinkage sleeve and preparation method as well as application thereof

Abstract

The invention discloses a low smoke zero halogen flame-retardant mould shrinkage sleeve and a preparation method as well as application thereof. The low smoke zero halogen flame-retardant mould shrinkage sleeve comprises the following raw materials in parts by weight: 85-100 parts of polyolefine resin, 8-15 parts of maleic anhydride functional group-grafted ethylene-vinyl acetate copolymer, 3-20 parts of red phosphorus powder, 4-30 parts of expandable graphite, 10-90 parts of magnesium hydroxide, 0.5-2.5 parts of antioxidant, 1-3 parts of lubricant, 1-2.5 parts of cross-linking auxiliary agent and 5-8 parts of black master batch. The preparation method comprises the following steps of: uniformly mixing the raw materials; extruding by using a double-screw extruder at the temperature of 100-160 DEG C; performing wire drawing, air cooling and granulation; injecting the granular material formed by granulation into the mould shrinkage sleeve; performing irradiation at the dosage of 8-12Mrad; and then extending and drawing the mould shrinkage sleeve, which is subjected to irradiation cross-linking, at the temperature of 140-160 DEG C and cooling and forming to obtain the low smoke zero halogen flame-retardant mould shrinkage sleeve. The preparation method is simple; an obtained product has superior flame retardant performance and low smoke formation; meanwhile, superior mechanical property, electrical insulation performance and thermal resistance performance are kept.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a flame-retardant mold shrink sleeve with polyolefin as a matrix resin, in particular to a low-smoke, halogen-free flame-retardant mold shrink sleeve, a preparation method and application thereof. Background technique [0002] In the design and assembly of aviation, aerospace and navigation equipment, the electronic equipment contained in the electronic system is more and more complex, and the connection between various electronic equipment units often requires a large number of wires and cables. In the process of electrical appliance assembly, a lot of stress relief, sealing and mechanical protection are required at the cable terminal connection, cable opening and cable bifurcation connection. In the early days, winding tape was used for winding treatment, but it was troublesome to operate, low in efficiency, and easy to loosen. Disadvantages such as detachment, unsightly appearance and l...

AI Technical Summary

Problems solved by technology

At present, there are not many halogen-free flame-retardant shrink sleeve products on the market at home and abroad. The halogen-free flame retardants in the formula are mostly phosphorus-nitrogen intumescent flame retardants (IFR) and inorganic metal hydroxides, or flame retardants. The combustion effect is limited, or the cost performance is not high, or the amount of smoke is large, each has its own advantages and disadvantages

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