Flexible vinyl dedicated to wire and cable

Abstract

A soft polyviny chloride plastic for electric transmission line or cable is proportionally prepared from PVC resin, refractory plasticizer, stabilizer, antioxidizing agent, filler and lubricant. Its advantages are high refractory class (120deg.C), long high-temp stabilizing duration (300 min), and low high-temp volatilization.

Description

technical field [0001] The invention belongs to the wire and cable insulating material among industrial polymer materials, and more specifically relates to a special heat-resistant soft polyvinyl chloride plastic used for wires and cables. Background technique [0002] The copper conductor of the wire and cable needs to transmit electric energy and load a certain amount of current, and at the same time, the copper wire generates a higher temperature during operation. When the cross-sectional area of ​​the copper conductor is constant, the larger the current transmitted, the higher the temperature generated, so there is a heat resistance requirement for the insulation material of the wire and cable; according to the size of the transmitted current, different temperatures are generated, so the insulation Materials have different heat resistance requirements, so that they can maintain good mechanical and physical properties under long-term high temperature to meet the requireme...

AI Technical Summary

Problems solved by technology

[0012] Japanese patents JP2001-266649A and JP10-306185A and JP9-132689A all disclose polyvinyl chloride compositions with electric wires. In the compositions of the three documents, antioxidants seem to be partial, but the applicant believes that polyvinyl chloride as electric wires Whether the ethylene composition contains an antioxidant is related to the heat resistance of the product. Specifically, it will affect the retention rate of tensile strength after aging, the retention rate of elongation at break after aging, and the thermal stability time. In particular, whether the specific selection of antioxidant species is appropriate or not will directly affect the aforementioned mechanical and physical properties

[0013] The highest heat-resistant grade of soft polyvinyl chloride plastics used for wires and cables in the prior art is only 105°C, and the heat-resistant grade is not ideal

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