Preparation method of ceramic polyolefin fire-resistant cable material

Abstract

The invention provides a preparation method of a ceramic polyolefin fire-resistant cable material. The cable material comprises the following components in parts by weight: 40-100 parts of polyolefin,1-30 parts of a compatibilizer, 350-500 parts of porcelain powder, 20-200 parts of a fluxing agent, 20-100 parts of a flame retardant, 2-20 parts of a lubricant and 1-10 parts of an antioxidant; andthe preparation method sequentially comprises the following steps: (1) adding the polyolefin, the compatibilizer, the flame retardant and the antioxidant to an internal mixer and internally mixing to90-110 DEG C in 5-15 min; (2) adding the porcelain powder and the lubricant and internally mixing to 115-135 DEG C in 2-8 min; (3) then adding the fluxing agent, internally mixing to 165-185 DEG C in20-40 min and stopping the internal mixing; and (4) performing twin-screw extrusion molding on materials obtained in the step (3) to obtain the ceramic polyolefin fire-resistant cable material. The preparation method of the invention is simple in operation and low in raw material cost; and the obtained cable material has good fire resistance and good application prospects.

Description

technical field [0001] The invention relates to the field of preparation of new materials, in particular to a method for preparing ceramic polyolefin refractory cable materials. Background technique [0002] With the development of society and economy, wires and cables have become an invisible and important part of people's daily life. In case of fire, it is very important to ensure the normal operation of the circuit. Therefore, in some large high-rise buildings and densely populated places, fire-resistant wires and cables have become people's subjective choice. The cables that can be made of existing refractory materials mainly include: mica tape fire-resistant cables, magnesium oxide mineral insulated cables, flexible fire-resistant cables and fire-proof mud inorganic mineral fire-resistant fire-resistant cables, etc. These cables have various shortcomings, such as: mica tape fire-resistant The cable has poor flexibility, limited thickness, slow wrapping speed and low pr...

AI Technical Summary

Problems solved by technology

The cables that can be made of existing refractory materials mainly include: mica tape fire-resistant cables, magnesium oxide mineral insulated cables, flexible fire-resistant cables and fire-proof mud inorganic mineral fire-resistant fire-resistant cables, etc. These cables have various shortcomings, such as: mica tape fire-resistant The cable has poor flexibility, limited thickness, slow wrapping speed and low production efficiency, resulting in high processing and labor costs; strong moisture absorption, storage for 3-6 months, and rapid decline in insulation performance after being damp; in addition, the price is high, especially is synthetic mica

Magnesium oxide mineral insulated cables are expensive, the production process is complicated and the laying is difficult