1.The vinyl content in the rubber is not enough or the vinyl content of the raw rubber itself is not evenly distributed, so that the rubber does not reach the positive sulfur point when curing, the curing speed is too long, and the curing is not sufficient, resulting in poor elasticity of the rubber. Can improve the overall vinyl content in the glue, and add the right amount of hydrogen-containing silicone oil in the formula, reduce the amount of filler to improve the amount of glue to solve the poor resilience and slow curing speed; Raw rubber with different vinyl content can also be used with a small amount of high vinyl raw rubber to control the tearing and permanent deformation of the rubber material. In the formula, an optimal balance point should be found to avoid the brittle of the rubber material to improve the elasticity of the rubber material.

2. The acidic compound itself is also an important factor leading to poor resilience and slow vulcanization rate of the compound. Because the white carbon itself is acidic, plus the addition of structural control agent is more acidic, so that the glue is acidic, acidic glue has a delay effect on vulcanization, and the high temperature resistance will decline. It can improve the acidity content of the glue by adding appropriate weak alkaline substances. The PH value of the general glue is in the neutral or weak alkaline range, which is good for improving the elasticity and curing speed.

3. Other aspects: the plasticizer or structural control agent in the compound is added too much, resulting in poor resilience and slow curing speed of the compound; The plasticizer or structural control agent added too much, has delayed curing effect on the rubber, which leads to poor elastic recovery and slow curing speed of the rubber, can choose a narrow molecular weight distribution and with a certain volatile raw rubber, improve the release of the rubber, so as to reduce the amount of plasticizer; With alkoxy silane white carbon black surface treatment, with hydroxyl silicone oil for use, the use of two-step method to make white carbon black molecules and raw rubber molecules have a certain combination of reaction time, the process can take health, to reduce the amount of structural control agent, to improve the rubber elastic and curing speed.

At the same time, the establishment of a standard vulcanization curve for each type of rubber is also a means to control the stability of the production quality of mixed rubber.