Method for producing modified polyvinyl chloride and nitrile butadiene rubber composite cable material

Abstract

The invention provides an improved production method for a polyvinyl chloride and chemigum compound cable material, which simplifies the production process, reduces the production cost and ensures the product quality. In the method, polyvinyl chloride, dicapryl phthalate, a stabilizer, a toner, calcium carbonate and chemigum are used as raw materials. The method comprises the following production steps: (1) premixing the polyvinyl chloride, the stabilizer, the toner, and the calcium carbonate in a homogenizer until the mixed temperature reaches 70 DEG C to 80 DEG C; (2) mixing the mixture at slow speed of revolution after the mixed temperature reaches 70 DEG C to 80 DEG C, and adding a liquid plasticizer (DOP); (3) mixing the mixture at slow speed of revolution so that DOP is completely absorbed when the temperature reaches 110 DEG C; (4) adding powdered chemigum, and mixing the mixture for 1 to 2 minutes at slow speed of revolution; and (5) discharging.

Description

technical field [0001] The invention relates to a production method of polyvinyl chloride and nitrile rubber (PVC-NBR) composite cable material. The cable material is mainly used for producing insulating layers and sheath layers of cables. Background technique [0002] At present, in the process of producing polyvinyl chloride and nitrile rubber composite cable materials, the relationship between the raw materials used and their dosage is as follows, the following are parts by weight: 80-100 parts of polyvinyl chloride (PVC), 60 parts of dioctyl phthalate ~80 parts (also known as plasticizer, DOP), 4~8 parts of stabilizer, 1~3 parts of pigment, 20~30 parts of calcium carbonate, 20~50 parts of nitrile rubber, the production of this cable material generally adopts high speed Stirring method specifically comprises the following steps: [0003] 1. Pre-mix polyvinyl chloride, stabilizer, toner, and calcium carbonate at high speed (900rmp) in a high-speed mixer until the mixing t...

AI Technical Summary

Problems solved by technology

[0008] Nitrile rubber cannot be blended with polyvinyl chloride and dioctyl phthalate (plasticizer DOP) prematurely, because at this time the nitrile rubber will first absorb the plasticizer DOP, and its combination with the plasticizer DOP The speed is much faster than the combination with PVC, which directly leads to agglomeration that cannot be opened again. In this way, the elasticity of nitrile cannot be displayed, and it will also cause the surface of the product to be frizzy and granulated.