Halogen-free flame-retardant polyolefin cable material capable of resisting 150 DEG C and preparation method thereof

Abstract

The invention relates to a halogen-free flame-retardant polyolefin cable material capable of resisting 150 DEG C, comprising following components in part by weight: 65-75 parts of high-density polyethylene (HDPE), 25-35 parts of ethylene-octene copolymer (POE), 6-10 parts of compatilizer, 1.5-2.5 parts of antioxidant, 5-15 parts of silicon rubber, 70-90 parts of flame retardant and 1.5-2.1 parts of cross-linking agent; and the weight sum of the high-density polyethylene and the ethylene-octene copolymer is 100 parts. The preparation method of the cable material comprises the following steps of: uniformly mixing HDPE, POE and the compatilizer; putting the mixture to a Banbury mixer to mix for 5-10min at 150-160 DEG C; adding the silicon rubber, the antioxidant, the flame retardant and the cross-linking agent; after uniformly mixing the materials, discharging the material; and preparing the cable material by a extruder granulation production line.

Description

technical field [0001] The technology relates to a wire and cable material, in particular to a 150°C-resistant halogen-free flame-retardant polyolefin cable material and a preparation method thereof. Background technique [0002] Halogen-free flame-retardant cables The development of polyolefin cables has become a research hotspot in various countries. The temperature resistance grade of the cross-linked polyolefin cable materials currently developed and researched is generally 90-135 ° C. The preparation of cables resistant to 150 ° C generally uses fluoroplastics and silicone rubber as the main raw materials. Fluoroplastics will produce toxic gases during processing, and are not It is easy to process, and at the same time, the cost is relatively high. At present, domestically developed halogen-free flame-retardant polyolefin cables generally use PE and EVA as the base resin, and at the same time add a large amount of halogen-free flame retardants to improve their flame-re...

AI Technical Summary

Problems solved by technology

Due to the use of elastomer as the base resin, cables prepared by this method cannot be used in high temperature applications

"A low-smoke halogen-free flame-retardant polyolefin cable compound and its preparation method" (patent application number 01111063.8) discloses a base resin based on EVA and HDPE, EVA-g-MAH as a compatibilizer, and 65~ With 75 parts of EVA, a 125°C grade cable can be prepared, but the performance of the 150°C grade cable cannot be achieved.

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