Polyvinyl chloride/polyurethane alloy cable material and preparation method thereof

Abstract

The invention discloses a polyvinyl chloride/polyurethane alloy cable material and a preparation method thereof. The polyvinyl chloride/polyurethane alloy cable material comprises, by weight, 40-80 parts of polyurethane, 20-60 parts of polyvinyl chloride resin, 5-50 parts of a plasticizer, 1-10 parts of a stabilizer, 1-5 parts of a fire retardant, 0-80 parts of a filler, 0.5-2.0 parts of an antioxidant, and 1.0-6.0 parts of a processing assistant, wherein the processing assistant is one or a mixture of more of oxidized polyethlene wax, erucamide and acrylate polymers. The restriction of modification of polyvinyl chloride by polyurethane in the prior art is broken, a new polyurethane and polyvinyl chloride compatibility idea is provided, different compatibilities of polyurethane and polyvinyl chloride are carried out in a range wider than that in the prior art according to different product requirements, and the alloy cable material with extremely good anti-fatigue service life and extremely low swelling-shrinkage is obtained through reasonable compatibility.

Description

technical field [0001] The invention relates to a cable material, in particular to a fatigue-resistant and low-expansion polyvinyl chloride / polyurethane alloy cable material and a preparation method thereof. Background technique [0002] Wires, cables and optical cables are widely used in various fields such as electronic appliances, mechanical equipment, civil facilities, military industry and national defense. They are extremely important components, and their performance and life directly affect the performance and life of the entire system. In some occasions, cables need to withstand dynamic environmental changes, such as mobile cables, cables for robots, occasions with vibration, occasions with large temperature cycle changes, etc. At this time, the cables have basic In addition to the use characteristics, it must also have characteristics such as fatigue resistance and low expansion and contraction. In such a use environment, in addition to the reasonable structural d...

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Problems solved by technology

[0003] In the selection of sheath material for this type of cable, the general soft polyvinyl chloride material uses a high-polymerization resin and adds a large amount of plasticizer to improve elasticity and strength, but the disadvantage of adding a large amount of plasticizer is mechanical strength. Low temperature resistance, as the plasticizer slowly seeps out, the life of the wire and cable sheath will be shortened and the reliability will be reduced

Although another method of toughening polyvinyl chloride with a small amount of polyurethane can slightly increase the toughness of the material, its life is still very short under long-term or high-strength fatigue resistance conditions, so most of the existing technologies are difficult to fully meet the requirements. However, vulcanized rubber or cross-linked plastic materials with excellent fatigue resistance have problems such as high price, poor flame retardancy, difficulty in extrusion molding, need for vulcanization or cross-linking, high manufacturing cost, and low production efficiency.

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