How to improve the hardness of rubber?
Increasing the degree of crosslinking (increasing the dosage of vulcanizing agent and prolonging the curing time properly);Increase the dosage of reinforcing agent, or choose reinforcing agent with high structure and large specific surface area;Hardening resin, high styrene and other hardening agent;
General 90SHA or more need to use hard resin or high styrene such things, of course, have to properly adjust the strengthening agent and curing system
1. selection of high Mooney rubber (high molecular weight);2., increase the dosage of reinforcing agent, or choose the reinforcing agent with high structure and large specific surface area;3. reduce the amount of plasticizer, softener, or use viscosity high plasticizer;4. proper increase of gum content;5., improve the degree of cross-linking (increase the amount of vulcanizing agent, appropriately prolong the curing time, etc.);6., use stiffening resin, high styrene and other hardening agent;7. rubber and plastic combination;8. reduce plasticizing and prevent over refining;
