Reasons and solutions for poor elasticity of PP Self Wrap Braided Sleeve

PP Self Wrap Braided Sleeve is a very elastic tubular material that can stretch four to eight times its own length. But if you encounter inferior PP Self wrap braided sleeve, its elasticity is far from the normal standard. When refining Pp Self Wrap Braided Sleeve, some manufacturers of PP Self Wrap Braided Sleeve found that the elasticity of the formed PP Self Wrap Braided Sleeve was not very good. It did not stretch back immediately after being pulled, and it could be clearly seen when it rebounded after folding. When it comes to creases, this situation may be worse than ordinary silicone tubes, so what is the specific reason for the poor elasticity of PP Self Wrap Braided Sleeve?

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 Braided Sleeve. Let's take a look at the problem together.
1. What are the reasons for the poor elasticity of PP Self Wrap Braided Sleeve?
①Second stage vulcanization.
②Change to white carbon black. Generally speaking, PP Self Wrap Braided Sleeve have good resilience. Raw rubber, white carbon black, double 2.5.
Second, how to solve this problem, you can try the following methods
① Or directly purchase the compound rubber for Braided 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.