Rubber Chem Encyclopedia

Effect of sulfur on the adhesive properties of reclaimed rubber

Create Date:2020-06-01 09:24:41Click volume:205
Effect of sulfur on the adhesive properties of reclaimed rubber

Sulfur is one of the most commonly used vulcanizing agents in the production process of recycled rubber products. The vulcanized rubber has excellent mechanical properties; when using recycled rubber to produce rubber products containing skeleton materials, the adhesion between the recycled rubber and the skeleton material affects the rubber Product performance and service life; when sulfur vulcanization is used, the usage and amount of sulfur directly affect the adhesion between the reclaimed rubber and the skeleton material. So in the actual production, what problems should rubber product manufacturers pay attention to? How can sulfur be used to further improve the adhesion of reclaimed rubber?

1. The effect of sulfur dosage on the adhesiveness of reclaimed rubber

When sulfur vulcanized reclaimed rubber is used, after the speed of the vulcanization crosslinking reaction and the speed of the adhesive reaction reach equilibrium, the adhesion between the reclaimed rubber and the skeleton material is the best. Therefore, rubber product manufacturers should comprehensively consider the time for the crosslinking reaction and adhesion reaction of the rubber compound, adjust the type and dosage of sulfur 2LLYY61 and accelerator, and coordinate the relationship between the two. Under normal circumstances, regenerated rubber and skeleton materials such as brass have good adhesion properties, and there must be polysulfide bonds in the rubber compound. Recycled rubber product manufacturers can control the amount of sulfur to more than 3 parts to improve the adhesion between regenerated rubber and skeleton materials. Sex.

2. The effect of sulfur species on the adhesiveness of reclaimed rubber

In actual production, too much sulfur will spray out the surface of the product. Frost spraying seriously affects the adhesion between the reclaimed rubber and the skeleton material. Therefore, rubber manufacturers can increase the adhesiveness of the rubber by increasing the amount of sulfur. It is necessary to control the amount of sulfur reasonably, or use insoluble sulfur to prevent sulfur from spraying out of the surface and affecting the adhesiveness of the reclaimed rubber.

3. The effect of sulfur usage on the adhesiveness of reclaimed rubber

Insoluble sulfur is widely used in the production of recycled rubber products containing skeleton materials, which is conducive to the adhesion between recycled rubber and skeleton materials. When using insoluble sulfur, rubber product manufacturers need to pay attention to the storage environment of sulfur and the mixing temperature and mixing rubber storage. Temperature etc.

① Generally, the storage temperature of insoluble sulfur should not be too high, and it should be controlled below 40 ℃. The place where insoluble sulfur is stored cannot store amine raw materials at the same time. ②The mixing temperature should not exceed 95 ℃ when mixing with insoluble sulfur vulcanized reclaimed rubber. ③The reclaimed rubber compound needs to be stored in a low temperature and low humidity environment. The storage time should not be too long, otherwise the insoluble sulfur will be transformed into soluble ordinary sulfur, which will cause the reclaimed rubber compound to frost, which will affect the adhesiveness of the reclaimed rubber. .

When using reclaimed rubber to produce reclaimed rubber products that require skeleton materials, rubber product manufacturers must reasonably control the amount of sulfur. When using insoluble sulfur, strictly control the parking environment of raw materials, mixing process parameters, and the parking environment of mixed rubber. The bonding performance between skeleton materials improves the comprehensive index of reclaimed rubber products.