Optimum curing time of silicone rubber compound

The production and molded silicone rubber need to be put into the hydraulic press for high temperature vulcanization. Especially for some high-yield silicone rubber products, the vulcanization time of silicone rubber compound is extremely strict. What about the best vulcanization time of silicone rubber compound?

Silicone rubber compound can be used only after adding vulcanizing agent and making thin rubber sheets, and it is generally preferred to use immediately after refining. The silicone rubber mixture will slowly volatilize with the storage time after adding the curing agent, especially after adding sulfur in summer, the silicone rubber mixture can only be stored for about 15 days, but can be stored for one month in spring and autumn, and can be effectively stored for 2-3 months in winter. However, the vulcanized silicone rubber compound will be stored for a long time because the vulcanizing agent inside will gradually volatilize, resulting in the difficult vulcanization appearance. The best way is to vulcanize it immediately after smelting.

Is it the best to refine the silicone rubber mixture and put it into use immediately? In fact, it is not. The silicone rubber mixture has just been refined, but the surface of the material is still hot. If it is used immediately, white spots and charring will appear. We should wait until the silicone rubber mixture is cooled to room temperature before using it. This is the best vulcanization time for silicone rubber mixture. The vulcanization time is the shortest and the product scrap rate is the lowest. If conditions permit, the refined silicone rubber mixture can be stored in the air conditioning room. It is better to use the refined materials on the same day.

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