Non-halogen red phosphorus flame-retardant heat shrinking tube and preparation method thereof

Abstract

The invention provides a non-halogen red phosphorus flame-retardant heat shrinking tube. The heat shrinking tube comprises the following components in parts by weight: 100 parts of ethylene-acetate hexane copolymer, 90 to 110 parts of magnesium hydroxide, 5 to 20 parts of polyphosphazene, 1 to 3 parts of complex antioxidant, and 2 to 5 parts of lubricant, wherein the acetate hexane content of the ethylene-acetate hexane copolymer is 14-28 percent; the average grain size of the magnesium hydroxide is less than 4 mu m; the anti-oxidant is compounded of 2,2'-methylene-bis(6-tert-butyl-para-cresol) and 2-hydroxy-4-(octyloxy)benzophenone which are in a ratio of 5:1; and the lubricant is one or more of the following substances: polyethylene wax, zinc stearate and stearic acid. The non-halogen red phosphorus flame-retardant heat shrinking tube does not contain halogen, red phosphorous, lead, mercury, cadmium, hexavalent chromium or other toxic and harmful substances, the flame retardance can pass VW-1 test, the tensile strength is more than 10.9MPa, the elongation at break is more than 260 percent, the product surface is smooth, and the processing performance is excellent.

Description

technical field [0001] The invention relates to a heat-shrinkable pipe material and a preparation method thereof. Background technique [0002] On July 1, 2006, the EU RoHS directive came into effect, and in November 2006, my country's electronic industry standard SJ / T 11363-2006 "Limit Requirements for Toxic and Hazardous Substances in Electronic Information Products" came into effect, prohibiting the use of lead and mercury in electronic information products , cadmium, hexavalent chromium, polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE). PBDE), to manufacture flame retardant heat shrink tubing. [0003] However, when red phosphorus burns, it will release toxic and irritating smoke, corrode human skin and mucous membranes, and endanger human health. The silver reacts electrochemically and connects the positive and negative poles of the circuit board, causing the circuit board to fail. So in June 2007, Apple released the "Apple Halogen Free Specific...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the defect that the use of red phosphorus as a flame retardant in the existing heat shrinkable tubes is harmful to the environment and products, and to provide a halogen-free, red phosphorus-free flame-retardant heat-shrinkable tube that does not contain Halogen, red phosphorus, lead, mercury, cadmium, hexavalent chromium and other toxic and harmful substances, the flame retardancy can pass the VW-1 test, the tensile strength is greater than 10.9MPa, the elongation at break is greater than 260%, and the product surface is smooth and the processing performance is excellent. excellent