Micro-interpenetrating network cross-linked low-smoke halogen-free flame-retardant cable material and preparation method thereof

Abstract

The invention discloses a micro-interpenetrating network cross-linked low-smoke halogen-free flame-retardant cable material and a preparation method thereof. The cable material includes, by weight, 10-25 parts of ethylene-vinyl acetate copolymer, 20-40 parts of silane-grafted linear low-density polyethylene, 15-25 parts of a polyolefin thermoplastic elastomer, 10-25 parts of ultra-low-density polyethylene, 10-15 parts of functionalized polyolefin resin, 0.5-2.5 parts of high molecular weight polysiloxane, 0.5-1.5 parts of a crosslinking sensitizer, 0.5-2 parts of an auxiliary crosslinking agent, 0.1-0.5 part of a chain extender, 120-180 parts of a high efficiency composite flame retardant, 0.5-2.5 parts of a tubular microcrystalline nano-carbon forming agent, 1-2 parts of organosilane, 0.5-2 parts of an anti-oxidant, and 0.5-1.5 parts of a processing auxiliary agent. The cable material has excellent comprehensive performance and service life, good mechanical property, good dielectric and insulating properties and small creep poles, and is high and low temperature resistant, water resistant, acid and alkali resistant, solvent resistant, wear resistant, creep resistant, ozone resistant and bending resistant; and the cable material can meet different application scene demands of cables, and has the comprehensive performance of dealing with complex and changeable environments.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a functional plastic, in particular to a micro-interpenetrating network cross-linked low-smoke halogen-free flame-retardant cable material and a preparation method thereof. Background technique [0002] Interpenetrating network polymer (IPN) is a unique polymer blend, which is formed by the cross-linked networks of cross-linked polymer I and cross-linked polymer II, which are continuously interpenetrated with each other. Due to its forced mutual compatibility, it has good mechanical properties, high tensile strength and tear strength, extremely low oxygen and water vapor transmission rates, excellent dielectric and insulating properties, and has certain Chemical inertness, excellent water resistance, acid and alkali resistance, solvent resistance, excellent high temperature stability and low temperature toughness, low surface wear, creep resistance, good biocompatibility ...

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Problems solved by technology

[0003] Wires and cables are used in all aspects of human life. With the development of social life and new technologies and industries, the requirements for wires and cables are becoming more diverse and their performance is improving. Therefore, the requirements for cable materials are also constantly increasing, especially in the current In key industries such as big data, robotics, new energy, optical communications, rail transit, and aerospace, the application scenarios of cables are rich and diverse, with different requirements. The original thermoplastic materials, cross-linked materials (including radiation cross-linked, silane Cross-linking and chemical cross-linking, etc.) have been unable to meet the requirements in some application scenarios

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