Insoluble sulfur is generally used in the production of rubber composite products such as tires, and is an accelerator and vulcanizing agent in the rubber industry. Compared with traditional industrial sulfur powder, what are the advantages of insoluble sulfur?
1. The compound was not sprayed during storage. Keep the rubber composition and performance uniform; overcome the disadvantage of poor adhesion caused by frosting; prevent the contamination of products and molds; remove the coating added in the slurry to overcome frosting and provide conditions for production linkage.
2. There is no migration phenomenon between adjacent adhesive layers. Especially in the rubber compounds of butadiene rubber and butyl rubber, the migration speed of ordinary sulfur is very fast, which can be avoided by adding insoluble sulfur.
3. Reduce scorching during mixing and storage.
4. Reduce treatment time. When the curing temperature is reached, it is in the “activation stage”, that is, chain depolymerization, which accelerates the curing speed and reduces the content of sulfur, which is beneficial to improve the aging performance of the product.
5. It is beneficial to the adhesion of rubber to other materials, especially it can be used in combination with S to improve the adhesion.
6. An indispensable additive in radial tires. In the production of radial tires, it can effectively avoid rubber explosion, not easy to produce early vulcanization, and maintain good viscosity of rubber rubber, which is conducive to molding operations, and ensures the uniformity of rubber vulcanization and the stability of product quality.