Ethylene-propylene-diene rubber thermal shrinkable tube and preparation method thereof

Abstract

The invention provides an ethylene-propylene-diene rubber thermal shrinkable tube to solve the problem that the conventional thermal shrinkable tube has low performance in the aspects of high-temperature resistance, oil resistance and solvent resistance and cannot meet the performance requirements of the industries such as automobiles, high-speed trains, military projects and aerospace on high oil resistance and high solvent resistance. The ethylene-propylene-diene rubber thermal shrinkable tube is made from the following materials: ethylene-propylene-diene rubber, thermal shrinkable resin and a reinforcing agent. The zinc oxide, zinc stearate, a softener and an age resister can be added selectively. When chemical crosslinking is adopted, a crosslinker is required. Meanwhile, the invention provides three methods for producing the thermal shrinkable tubes from the materials, namely a two-step mixing electronic crosslinking method, a one-step mixing electronic crosslinking method and a chemical crosslinking method. The ethylene-propylene-diene rubber thermal shrinkable tube provided by the invention has high ozone resistance, weather-aging resistance, high heat resistance, high vapor resistance, high electric insulation and high chemical medium resistance and can be applied in the connector protection and sealing of power supply lines.

Description

technical field [0001] The invention relates to a heat-shrinkable tube, in particular to a EPDM heat-shrinkable tube and a preparation method thereof. Background technique [0002] At present, the main materials used to produce heat-shrinkable tubing include: ① olefin polymers or copolymers; ② rubber-like materials or thermoplastic elastomers styrene-butadiene-styrene block copolymer (SBS), styrene - One or more materials in the isoprene block copolymer (SIS); ③ other auxiliary materials. Although the existing heat-shrinkable tubes have good flame retardancy and environmental protection performance, they are relatively poor in temperature resistance, oil resistance and solvent resistance, and cannot adapt to high oil resistance and solvent resistance in automobiles, high-speed trains, military and aerospace industries. requirements. Contents of the invention [0003] In order to overcome the problem that the existing heat-shrinkable tubes have relatively poor performance...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing heat-shrinkable tubes have relatively poor performance in terms of high temperature resistance, oil resistance and solvent resistance, and cannot meet the performance requirements of high oil resistance and solvent resistance in industries such as automobiles, high-speed trains, military and aerospace industries, the present invention provides a EPDM heat-shrinkable tubing, its materials include: EPDM rubber, heat-shrinkable resin, reinforcing agent, and optionally add the following materials: zinc oxide, zinc stearate, softener, anti-aging agent , when chemical crosslinking is used, a crosslinking agent must also be added; at the same time, the present invention also proposes a method for producing heat-shrinkable tubes with the above-mentioned materials, and a kind of EPDM heat-shrinkable tube provided by the present invention has good Ozone resistance, weather aging resistance, reasonable high heat resistance, good water vapor resistance, electrical insulation performance and chemical medium performance, can be applied to the joint protection and sealing of power supply lines