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First: raw rubber system
1) rubber and plastic is also a very common means, and with high styrene, PVC/NBR alloy effect can also increase the hardness.
2) change the way the rubber grade, can also improve the hardness (less used)
Second: Vulcanisation promotion system
1) by increasing the vulcanising agent to increase the density of cross-chaining, improve hardness, such as increasing the use of sulfur greatly increased, etc.
In the production of recycled rubber products, other materials remain unchanged, add the corresponding amount of sulfur can improve the hardness of rubber products to a certain extent. (100 copies of rubber, sulphur dosage of up to 4 ~ 5 copies)
2) Add resin. In the manufacture of recycled rubber products at the same time the resin added to it can increase the hardness of rubber products.
3) Part of the product is vulcanised twice to increase the degree of cross-linking and improve the hardness.
Third: Reinforcement filling system
1) Add carbon black. Carbon black can be used as a filler in the rubber compound to change the hardness of rubber products.
2) Carbon black species change, in the premise of the rubber content rate remains unchanged, the hardness can also be increased significantly.
3) Add rubber powder, the hardness becomes higher, the effect is also very good, but also only suitable for moulding products oh.
Fourth: plasticising and softening system
Reduce the amount of rubber oil. Rubber oil plays a softening effect, in adding rubber products in the thermal expansion, reduce the interaction force between the polymer. Reducing the amount of rubber oil is equivalent to reducing the softening effect of the rubber product, which improves the hardness.
1) rubber and plastic is also a very common means, and with high styrene, PVC/NBR alloy effect can also increase the hardness.
2) change the way the rubber grade, can also improve the hardness (less used)
Second: Vulcanisation promotion system
1) by increasing the vulcanising agent to increase the density of cross-chaining, improve hardness, such as increasing the use of sulfur greatly increased, etc.
In the production of recycled rubber products, other materials remain unchanged, add the corresponding amount of sulfur can improve the hardness of rubber products to a certain extent. (100 copies of rubber, sulphur dosage of up to 4 ~ 5 copies)
2) Add resin. In the manufacture of recycled rubber products at the same time the resin added to it can increase the hardness of rubber products.
3) Part of the product is vulcanised twice to increase the degree of cross-linking and improve the hardness.
Third: Reinforcement filling system
1) Add carbon black. Carbon black can be used as a filler in the rubber compound to change the hardness of rubber products.
2) Carbon black species change, in the premise of the rubber content rate remains unchanged, the hardness can also be increased significantly.
3) Add rubber powder, the hardness becomes higher, the effect is also very good, but also only suitable for moulding products oh.
Fourth: plasticising and softening system
Reduce the amount of rubber oil. Rubber oil plays a softening effect, in adding rubber products in the thermal expansion, reduce the interaction force between the polymer. Reducing the amount of rubber oil is equivalent to reducing the softening effect of the rubber product, which improves the hardness.
