Silane self-crosslinked low-smoke, halogen-free and flame-retardant cable material capable of resisting temperature of 125 DEG C and preparation method of cable material

Abstract

The invention relates to a silane self-crosslinked low-smoke, halogen-free and flame-retardant cable material capable of resisting temperature of 125 DEG C and a preparation method of the cable material. The cable material is prepared from components in parts by weight as follows: 100 parts of basic resin, 90-160 parts of an inorganic flame retardant, 1-4 parts of a crosslinking aid, 0.1-1 part ofan initiator, 1-3 parts of a lubricant, 0-3 parts of color masterbatch, 0.1-1 part of an antioxidant and 0.1-3 parts of efficient catalysts. The preparation method of the cable material comprises thefollowing steps: the basic resin, the crosslinking aid and the initiator are internally mixed in an internal mixer for 7 min, then the inorganic flame retardant, the lubricant, the antioxidant and the color masterbatch are added, the materials are internally mixed for 10 min, the efficient catalysts are added finally, the materials are internally mixed for 2 min, extrusion by a double-layer extruder as well as granulation is performed, and a product is obtained. Compared with the prior art, the problem that late mixing is needed because a silane crosslinked material is divided into a materialA and a material B is solved, the crosslinking degree is increased by means of synergetic use of various efficient catalysts, so that the problems of high probability of cracking, low temperature resisting level and the like of low-smoke, halogen-free and flame-retardant materials are solved, and a complicated process of late cooking needed by a silane crosslinked product is simplified.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a temperature-resistant 125°C silane self-crosslinking low-smoke halogen-free flame-retardant cable material and a preparation method thereof. Background technique [0002] With the continuous improvement of people's safety awareness, the fire protection requirements for wires and cables are getting higher and higher. In order to avoid the damage to the human body caused by the large amount of smoke generated by the burning of wires and cables when a fire occurs, low-smoke halogen-free flame-retardant cable materials are becoming more and more popular. recognition. However, cables prepared from low-smoke halogen-free flame-retardant cables are prone to cracking during use, and the temperature resistance level is not high. In order to overcome these problems, cross-linked low-smoke halogen-free flame retardant materials have been proposed. Among them are radiation crosslinking and...

AI Technical Summary

Problems solved by technology

However, these two methods have greatly increased the cost of cable preparation. After the cable is prepared, the cable factory still needs to perform processes such as irradiation, warm water boiling, and steam heating, resulting in high cable manufacturing costs.