What are the reasons for the poor elasticity of the Automotive Wiring Harness Protection Sleeve?

Some manufacturers found that the elasticity of the molded Automotive Wiring Harness Protection Sleeve was not very good when refining the Automotive Wiring Harness Protection Sleeve. It did not stretch back immediately after being pulled, and the creases could be clearly seen when it rebounded after folding. This situation may be more than ordinary. The elasticity of the silicone tube is even worse, how to improve the specific reason.

Some people say that with a little white carbon black, the resilience will be better, but the tensile strength will not be reached, so it is not very useful, and it will not achieve the advantages of the Cable Sleeve. Let's take a look at the problem:
1. What are the reasons for the poor elasticity of the Automotive Wiring Harness Protection Sleeve?
①Second stage vulcanization.
②Change to white carbon black. Generally speaking, the Automotive Wiring Harness Protection Sleeve has good resilience, raw rubber, white carbon black, and double 2.5.
Second, how to solve this problem, you can try the following methods
① Or directly purchase the compound rubber for Cable Sleeve, and specifically specify the need for better resilience, which is very important for making rings;
②Do not use zinc stearate, it will affect the pressure change performance;
③Adjust the vulcanization conditions, and extend the time appropriately, generally at 165~170°C for 6~8 minutes;
④ It is best to use silica with surface treatment as the reinforcing agent, and ordinary precipitated silica can only meet the requirements of ordinary extruded products.