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Understanding of precautions for low temperature curing of silicone rubber products

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In the silicone products industry, low-temperature molding is a common curing molding process in recent years. It can mainly improve the production efficiency of manufacturers and the fluidity of processed products. For consumers, that is, food grade silicone rubber, which is added to raw materials to reduce the mold temperature, This kind of process is more practical for producing food grade silicone rubber products and products that are difficult to form, and its advantages are better than ordinary curing agents.

To sum up, the main advantages of platinum low-temperature molding are good dispersion, low volatility, fast sulfur addition time, short molding cycle, molding products have no glue smell, basically do not need secondary molding, the anti yellowing effect is relatively prominent, the adsorption strength is not as high as that of silicone rubber products produced by ordinary vulcanizing agent, but the high price of auxiliary materials is a disadvantage.

Precautions for use:

1、 In the workshop of silicone rubber molding manufacturer, it is forbidden to have nitrogen, phosphorus, sulfur, lead, polyethylenealkynyl and other substances flowing into the workshop environment. Because the above substances can poison platinum and fail to achieve the purpose of crosslinking, the product molding cycle will be prolonged, and even the product can not be cured. This is also the reason why many factories cannot form platinum solidification.

2、 Some silicone color adhesives will also lead to platinum poisoning and failure and cannot be used. Therefore, when selecting vulcanizing agent for production, it can be used only after small-scale test and confirmation.

3、 After mixing the silicone rubber with platinum vulcanizing agent, it is recommended to vulcanize it within 4-8 hours to prevent room temperature crosslinking. If it is necessary to extend the storage time, add a little delay agent as appropriate.

4、 When there is hydrogen containing silicone oil in the silicone rubber, the silicone rubber products are prone to bubble and bulge, and when there is hydrogen containing silicone oil in the silicone rubber, the rubber will die when mixing agent a alone.

5、 After mixing rubber or high-temperature rubber, the open mixer shall be fully cleaned before refining low-temperature rubber, so as to avoid platinum poisoning and failure. The rubber that cannot be vulcanized in time shall be refrigerated at low temperature to prevent room temperature crosslinking.

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