Anti-mouse telephone lead-in line

Abstract

The invention discloses an anti-mouse telephone lead-in line which comprises two circular copper conductors. The two conductors are intertwisted for forming a twisted wire pair. A polyethylene layer internally comprises a plurality of air holes. The volume ratio between the plurality of air holes and the polyethylene layer is 40-60%, and the air holes are filled with nitrogen gas. A polyvinyl chloride layer coats the external surface of an aluminum foil. A polyethylene sheath layer coats the external surface of the polyvinyl chloride layer. An intermediate tensile layer is arranged between the polyvinyl chloride layer and the polyethylene sheath layer. The intermediate tensile layer is composed of the components of polyamide-6 resin, poly(tetramethylene adiloamide), ethene and norbornylene copolymer, maleic anhydride grafted amorphous polyolefin, N,N'-di-beta-naphthyl-p-phenylenediamine, polyethylene wax, polyethylene glycol, polyethylene glycol and acetin. The anti-mouse telephone lead-in line has advantages of reducing an interference to signal transmission and remarkably improving a tensile strength.

Description

technical field [0001] The invention relates to a telephone lead-in wire, in particular to a mouse-proof telephone lead-in wire. Background technique [0002] Traditional telephone wires have two cores and four cores, and the diameters of the core wires are 0.4~1.0mm. The structure is generally two or four core wires wrapped with polyethylene, and the common core wire material is copper. The existing telephone line structure determines that its tensile strength is limited. When long-distance installation is required, it is necessary to set up special steel cables for reinforcement, otherwise it is easy to break. Especially when installing in some inconvenient areas such as mountainous areas, specially set up steel cables It greatly increases the difficulty of construction, and is easy to be damaged, and the improvement of electrical performance is limited. Contents of the invention [0003] The invention provides a rodent-proof telephone lead-in wire, which reduces the in...

AI Technical Summary

Problems solved by technology

The existing telephone line structure determines that its tensile strength is limited. When long-distance installation is required, it is necessary to set up special steel cables for reinforcement, otherwise it is easy to break. Especially when installing in some inconvenient areas such as mountainous areas, specially set up steel cables Greatly increases the difficulty of construction, and is easy to damage, and the improvement of electrical performance is limited

Images