Preparation method of heat-resistant high-strength PVC cable material

Abstract

The invention relates to the field of PVC materials, in particular to a preparation method of a heat-resistant high-strength PVC cable material. The preparation method comprises the following preparation steps of (1) material preparation, wherein 100 parts by weight of PVC resin, 85-110 parts by weight of chlorinated polyvinyl chloride, 65-95 parts by weight of silicon compound filler, 10-22 partsby weight of surface modifier, 70-105 parts by weight of plasticizer, 7-12 parts by weight of lubricant, 1-3.5 parts by weight of heat stabilizer, 6-10 parts by weight of flow modifier, 8-17 parts byweight of film-forming agent and 1-3 parts by weight of spray inhibitor are weighed separately; (2) mixing, wherein the components weighed in the step (1) are evenly stirred after being mixed, a stirring temperature is 45-60 DEG C, a stirring rate is 60-80 r / min, stirring time is 5-10 h, and a mixture is obtained after even mixing is conducted; (3) pelleting, wherein the mixture obtained in the step (2) is subjected to pelleting to obtain the heat-resistant high-strength PVC cable material.

Description

technical field [0001] The invention relates to the field of PVC materials, in particular to a preparation method of a heat-resistant high-strength PVC cable material. Background technique [0002] In the prior art, the cable industry usually uses PVC as the insulating pipe material on the outside of the cable, but due to its own shortcomings, the heat resistance of PVC resin is very limited, and it is very easy to age and decompose in a high temperature environment, making the halogen in the matrix PVC material Hydrogen bonds between elements and adjacent carbon atoms produce hydrogen chloride gas to detach and form carbon-carbon double bonds on the matrix polyvinyl chloride, thus greatly reducing the mechanical properties of the material, especially prone to embrittlement, cracking and thermal deformation. [0003] On March 16, 2018, the Chinese Patent Office disclosed a patent application for a preparation method of a heat-resistant PVC pipe. The application announcement ...

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Problems solved by technology

[0004] In order to solve the problem that the heat resistance of the PVC cable material prepared by the prior art is very limited, it is very easy to age and decompose in a high temperature environment, so that the halogen elements in the matrix polyvinyl chloride material and the hydrogen bonds of adjacent carbon atoms jointly produce hydrogen chloride gas to detach and decompose. The carbon-carbon double bond is formed on the matrix polyvinyl chloride, so the mechanical properties of the material are greatly reduced, especially the problems of embrittlement, cracking and thermal deformation are easy to occur. The invention provides a heat-resistant high-strength PVC cable material. Preparation method, it has excellent heat resistance, and has better mechanical properties than ordinary PVC cable materials

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