Insulation material for telephone earphone wire

Abstract

The invention discloses an earphone wire-used insulting material which is prepared by mixing a thermoplastic polyester elastomer and high density polyethylene, wherein, the mixing ratio of the thermoplastic polyester elastomer to the high density polyethylene is 1:1 to 6:1. The insulting material has the advantages that the earphone wire-used insulting material is formed by the mixing of thermoplastic polyester elastomer and high density polyethylene; the insulating property of wire core strand is enhanced; the earphone wire can be directly tin-plated while welded with other elements; the insulation of the tin-plated part can be fully resolved in the tin-plating process and no residue is left; simultaneously, the root part which is not tin-plated does not shrink; the mixing ratio of the thermoplastic polyester elastomer and high-density polyethylene is controlled according to the thickness of insulting layer of earphone wire-used insulting material; when the mixing ratio is 6 to 1, the minimum thickness of the insulting layer can be 0.03mm, thereby ensuring that the outer diameter of the earphone wire is small enough and the mechanical strength of the earphone wire is enough.

Description

technical field [0001] The invention relates to an insulating material, in particular to an insulating material for earphone wires. Background technique [0002] At present, general earphone wires widely use an enameled wire with insulating properties as the conductor transmission material. However, the wire core is prone to damage to the surface paint film and an increase in the number of pinholes in the process of being processed into bundles after being coated with insulating varnish. Phenomenon, thus greatly reducing the insulation performance of the beam. On the other hand, if the coating is used to solve the problem of insulation performance, the headphone cable needs to be stripped and then tinned before welding with other components, which will increase the processing cost, and it is very easy to strip the core during stripping , which leads to an increase in the on-resistance of the wire core and affects the electrical function. [0003] In order to solve the abov...

AI Technical Summary

Problems solved by technology

The insulation material insulation core made of PVC is used for earphone wires as the insulation layer, and the thickness of the insulation layer can only reach 0.15mm, and when tinning, on the one hand, the insulation material cannot be used at high temperatures (below 420°C). It is quickly decomposed, and part of the insulating material remains on the wire core; on the other hand, while decomposing, the root of the untinned part of the insulating material is easy to shrink, and it is difficult to control the size of the tinned part

Insulation material insulation core made of PP or PE, the thinnest thickness of the insulation layer used for earphone wires can reach 0.10mm ideally compared with PVC, but in the process of tinning, the insulation material is also at high temperature (420 ℃). It cannot be decomposed quickly, and part of the insulating material will remain on the wire core; in terms of the shrinkage of the root of the untinned part, its shrinkage is relatively large, which is worse than that of the insulating material made of PVC, making the size of the tinned part smaller. Difficult to control

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