Matt composition for wire cladding and matt shell for wires

Abstract

The invention provides a matt composition for wire cladding and a matt shell for wires. The matt composition for wire cladding comprises a first thermoplastic resin and a second thermoplastic resin, wherein the second thermoplastic resin is different from the first thermoplastic resin, an absolute value of a difference between a linear expansion coefficient of the second thermoplastic resin and a linear expansion coefficient of the first thermoplastic resin is 10%-30% of the linear expansion coefficient of the first thermoplastic resin.

Description

technical field [0001] The invention relates to a matte composition, in particular to a matte composition for covering electric wires and a matte shell layer for electric wires. Background technique [0002] The sheath (or "skin") of the wire is now widely used thermoplastic polyurethane (TPU) elastomer, and flame retardant is added to replace the commonly used polyvinyl chloride (PVC) material in the past. However, when thermoplastic polyurethane resins are used in wires and cables, they need to have desired mechanical, physical and chemical properties, such as abrasion resistance, transparency, chemical resistance, flame retardancy, matting (or matte), backlash elasticity, etc. [0003] However, since additives are included in the materials for manufacturing wire sheaths (or called "compositions for manufacturing wire sheaths"), when one of the mechanical, physical and chemical properties is adjusted, other properties often change, such as adding When used as a flame ret...

AI Technical Summary

Problems solved by technology

[0003] However, since additives are included in the materials for manufacturing wire sheaths (or called "compositions for manufacturing wire sheaths"), when one of the mechanical, physical and chemical properties is adjusted, other properties often change, such as adding When used as a flame retardant, it will reduce the mechanical properties of thermoplastic elastomers, etc.

[0004] Furthermore, methods for general elastomers to become matte elastomers, such as adding fillers to materials, grafting (grafting) rubber-like elastomers in resins, and resins containing cross-linkable ethylene copolymers (reference country The prior art of patent US5,508,347, Japanese Patent Laid-Open No. 59-089346), but the surface of the molded body of these materials has problems such as uneven extinction caused by uneven dispersion of these fillers, elastomers or copolymers