Method For Adjusting The Hardness Of Rubber Material.

Raw rubber system

1. Combining rubber and plastic is also a common method, and using high styrene and PVC/NBR alloy can also increase hardness.

2. Changing the type and grade of adhesive can also increase hardness (less commonly used)

Sulfurization promotion system

Increasing the crosslinking density and hardness by adding sulfurizing agents, such as significantly increasing the amount of sulfur used

Adding the corresponding amount of sulfur can improve the hardness of rubber products to a certain extent while keeping other materials unchanged during the production of recycled rubber products. (100 parts of glue, with a maximum sulfur dosage of 4-5 parts)

2. Adding resin to the production of recycled rubber products can increase their hardness.

3. Some products undergo secondary vulcanization to increase cross-linking and hardness.

Reinforcement filling system

1. Add carbon black. Carbon black can be used as a filler in rubber mixtures to change the hardness of rubber products.

2. By changing the type of carbon black, the hardness can be significantly increased while maintaining the same rubber content.

3. Adding rubber powder increases hardness and has a very good effect, but it is only suitable for molded products.

Plasticizing softening system

Reduce the amount of rubber oil used. Rubber oil has a softening effect and expands when added to rubber products, reducing the interaction force between polymers. Reducing the amount of rubber oil is equivalent to reducing the softening effect of rubber products and improving their hardness.