PVC cable material applied to high-fire-retardant environment-friendly CMR grade

Abstract

The invention discloses a PVC cable material applied to a high-fire-retardant environment-friendly CMR grade. The PVC cable material is characterized by comprising the following components in parts byweight: 100 parts of PVC resin, 4 to 6 parts of stearic acid, 20 to 30 parts of dicyclohexyl phthalate, 15 to 25 parts of epoxy fatty acid methyl ester, 18 to 25 parts of environment-friendly phosphorus-nitrogel containing flame retardant, 10 to 12 parts of magnesium hydroxide, 8 to 10 parts of zinc borate, and 6 to 10 parts of argil. The PVC cable material is obtained by means of the following steps: during material stirring and mixing via a high-speed mixer, adding the PVC resin by low-speed stirring, adding the stearic acid 15 seconds later and starting high-speed stirring, when the temperature of the resin reaches 50 DEG C, adding the dicyclohexyl phthalate and the epoxy fatty acid methyl ester to be mixed for 1 minute, and then adding the environment-friendly phosphorus-nitrogel containing flame retardant. On the basis of the mechanical property, the electrical property and the environmental protection property, an ideal production process capable of optimally matching raw materials is achieved, and the extrusion processing performance is stable by means of a UL1666 combustion test.

Description

technical field [0001] The invention relates to a cable sheath material, in particular to a PVC cable material applied to a high flame-retardant and environment-friendly CMR grade. Background technique [0002] The flame retardant performance of the cable mainly depends on the coating material used, so the flame retardant cable material, especially the high flame retardant cable material is the primary standard for cable flame retardant. However, market enterprises add a large amount of flame retardants and charring agents in order to blindly pursue higher flame retardant performance, but this results in a significant decline in the mechanical and electrical properties of the cable material, and increases the manufacturing cost. The main reason for this shortcoming is that liquid flame retardants and conventional plasticizers are added at one time, which affects the resin absorption rate and reduces the stirring and mixing effect, thereby affecting the dielectric constant an...

AI Technical Summary

Problems solved by technology

However, market companies add a large amount of flame retardants and charring agents in order to blindly pursue higher flame retardant performance, which results in a significant decline in the mechanical and electrical properties of the cable material, and increases manufacturing costs.

The main reason for this shortcoming is that liquid flame retardants and conventional plasticizers are added at one time, which affects the resin absorption rate, reduces the stirring and mixing effect, thus affects the dielectric constant and dielectric loss, and has a greater impact on hardness

When extruding and granulating, the processing temperature is narrow, and it is not easy to meet the requirements of the best extrusion process

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