(1) Insoluble sulfur exists in a dispersed state in rubber, preventing blooming, maintaining good tack, and ensuring the appearance quality of light-colored products.
(2) The uniform dispersion of insoluble sulfur in the rubber compound effectively inhibits sulfur aggregation and reduces the tendency for scorching during storage.
(3) Insoluble sulfur prevents blooming during storage, maintaining uniform component properties. It prevents contamination of products and molds and eliminates the need for additional coating processes to combat blooming, providing conditions for integrated production.
(4) Insoluble sulfur prevents migration between adjacent rubber layers. This is especially true in cis-rubber and butyl rubber compounds, where ordinary sulfur migrates very quickly, which is avoided by adding insoluble sulfur.
(5) Insoluble sulfur shortens the vulcanization time. Once the vulcanization temperature is reached, it has an "activation stage," namely a chain depolymerization effect, which accelerates the vulcanization rate, reduces the amount of sulfur used, and is beneficial to improving the aging performance of the product.
