Wugang carbon modified polyoxymethylene/polyurethane alloy marine cable sheath material and its production method

Abstract

The invention discloses a Binchotan-modified polyformaldehyde / polyurethane alloy marine cable sheath material. The marine cable sheath material comprises the following components in parts by weight: 50-60 parts of polyformaldehyde,40-50 parts of polyurethane, 10.0-40.0 parts of activated Binchotan micro-powder, 0.1-0.5 part of an antioxidizer, 0.05-1 part of a formaldehyde absorbent, 0.05-0.5 part of a formic acid absorbent and 0-10 parts of a lubricant. The invention also provides a preparation method of the marine cable sheath material. The marine cable sheath material disclosed by the invention has the advantages of high tensile strength, high elongation at break, good creep resistance and the like and also has the beneficial effects of excellent abrasive resistance and self-lubrication, small use amount of the lubricant, excellent electric property and unique electromagnetic wave barrier property and can be used for meeting special requirements of the marine cable sheath material for application to various severe environments.

Description

technical field [0001] The invention relates to a Wugang carbon-modified polyoxymethylene / polyurethane alloy marine cable sheath material and a production method thereof. Background technique [0002] The plastics used in the cable industry are almost all made of synthetic resins, supplemented with antioxidants, plasticizers, fillers, lubricants, colorants, flame retardants and other special-purpose agents. Due to the excellent electrical properties, physical and mechanical properties and chemical stability of plastics, and the processing technology is simple, the production efficiency is high, and the material source is abundant, so whether it is used as an insulating material or a sheath material, it has been widely used in wire and cable. Applications. [0003] Commonly used plastics for wires and cables are polyvinyl chloride, polyethylene and polypropylene, and other special plastics such as fluoroplastics, polyamides, polystyrene, chlorinated polyethers, polyimides, p...

AI Technical Summary

Problems solved by technology

Polyurethane has the advantages of good tensile strength and elongation, and has been used in wire and cable materials. Polyurethane is an elastomer, but it is not hard enough for cable materials alone, and it will gradually turn yellow when exposed to sunlight. It is resistant to atmospheric aging and high temperature. The hydrolysis is poor and the price is high, so alloy materials are generally used

[0005] Chinese patent CN102675819B discloses a wear-resistant self-lubricating polyoxymethylene, which combines POM resin with antioxidant, formaldehyde absorbent, formic acid absorbent, thermoplastic fluorine-containing polyurethane elastomer, polytetrafluoroethylene powder, and surface-treated inorganic nanoparticles. Add lubricants and lubricants to a high-speed mixer and mix, then melt and knead with a vented twin-screw extruder, extrude and granulate, and obtain that; this method needs to add inorganic nanoparticles, and because the particle size of inorganic nanoparticles is small , it is necessary to add a large amount of silane coupling agent to avoid the agglomeration of particles. At the same time, its tensile strength is 45Mpa and its notched impact strength is 20KJ / m 2 From the point of view, it is a general-purpose plastic with extremely high rigidity and unqualified embrittlement temperature (≤-45°C). The hardness of LX-A is >100. If the cable is made of a material without toughness CN102675819B, the cable it produces is very hard and very It is difficult to bend and cannot be wound on the cable reel (the finished cables are all wound on the cable reel), and the turning radius of the cable must be very large during installation and construction, so it is only suitable for manufacturing high-hardness zippers, gears, tubes, etc. , electrical components, etc.; and the cable material is a material with high impact resistance and toughness, and the hardness of LX-A should be <95. The elongation at break of the material obtained in Chinese patent CN102675819B obviously cannot meet GB15065 and "shielding material for cables (try out ) Purchasing Specification” stipulates the requirement of ≥200, and at the same time, there is no notch impact strength statement for cable materials, and there is no such indicator in the national standard for cable materials, so CN102675819B is not suitable for cable sheath materials

There is no report on the application of improved polyoxymethylene / polyurethane alloy in marine cable sheathing materials

Images