Polyvinyl chloride resin composition and insulated wire using the polyvinyl chloride resin composition

Abstract

An object of the present invention is to provide a polyvinyl chloride resin composition excellent in extrusion moldability, mechanical properties, and cold resistance, and an insulated electric wire using the polyvinyl chloride resin composition. As a method for solving the problem of the present invention, it relates to a polyvinyl chloride resin composition containing a polyvinyl chloride resin (A), a plasticizer (B), a non-lead stabilizer (C), and does not contain The non-lead stabilizer (C) contains zinc metal soap (c1) and hydrotalcite (c2), and contains 19% by mass or more and 24% by mass relative to 100% by mass of the polyvinyl chloride resin composition. The plasticizer (B) below, the non-lead stabilizer (C) at 4% by mass or more, and the mass ratio (c2 / c1) of the hydrotalcite (c2) to the zinc metal soap (c1) are 3.5 to 10.

Description

technical field [0001] The present invention relates to a polyvinyl chloride resin composition and an insulated wire using the polyvinyl chloride resin composition. Background technique [0002] An insulated wire includes a conductor and an insulating coating (insulation layer) covering the conductor, and is used, for example, as wiring in equipment such as electric equipment. Wiring inside equipment is constructed by connecting multiple insulated wires to connectors. The connection of the insulated wire to the connector is performed by inserting the insulated wire into the connector and connecting it to the terminal of the connector. [0003] As the connection of the insulated wire to the connector, there is, for example, crimp connection (pressure bonding) or crimp connection (pressure bonding). Crimp connection is a method of exposing the conductor terminal of an insulated wire and connecting the exposed conductors to the terminals one by one. Crimp connection is a met...

AI Technical Summary

Problems solved by technology

When a semi-rigid polyvinyl chloride resin with low extrusion moldability is extruded at, for example, an extrusion speed of 400 m / min, the surface appearance of the formed insulating layer may be cracked like sharkskin.

This phenomenon is the so-called melt fracture, which not only hinders the crimping connection of the insulated wire to the connector, reduces the processing efficiency, but also becomes the main cause of the decrease in the coatability of the printing ink (ink).

[0009] In order to improve the extrusion formability of semi-rigid polyvinyl chloride resin and increase the productivity of insulated wires, it may be considered to increase the heating temperature of semi-rigid polyvinyl chloride resin to adjust the viscosity, but when the heating temperature becomes higher, there will be polychloride Possibility that the vinyl itself deteriorates and the original properties cannot be obtained

In addition, it may be considered to increase the content of the plasticizer to be added to lower the viscosity, but there is a possibility that the polyvinyl chloride resin will soften and the mechanical properties of the obtained insulating layer will be reduced

[0010] In this way, when using semi-rigid polyvinyl chloride resin to manufacture insulated wires, the semi-rigid polyvinyl chloride resin has high viscosity and low extrusion moldability, so the extrusion speed is limited, and it is difficult to increase the productivity of insulated wires.

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