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What are the reasons for poor curing of silicone molds?

2025-03-26

What are the reasons for poor curing of silicone molds?
There are two types of liquid silicone, one is industrial grade condensation mold silicone, and the other is additive grade food grade liquid silicone. The curing principles of these two types of silicone are different, so the reasons for silicone not drying are also different, and the solutions are also different.
 
Industrial grade condensed liquid silicone is made by adding 2% to 3% curing agent to silicone, which is generally used to make large silicone molds and has a relatively low cost. The curing agent for industrial grade condensation mold silicone is organotin curing agent, which mainly achieves curing by absorbing moisture from the air.
 latest company case about What are the reasons for poor curing of silicone molds? 0
There are two reasons why food grade liquid silicone gel does not solidify or solidifies poorly during addition molding: one is that the ambient temperature is too low, and the other is that the silicone gel undergoes toxic reactions. Because the addition of silicone gel relies on temperature catalyzed platinum gold water reaction, too low a temperature can cause the silicone gel to solidify or the surface to become sticky after solidification. The poisoning reaction of silica gel is due to the fact that the addition type silica gel cannot come into contact with toxic substances containing nitrogen, phosphorus, and sulfur. Contact can cause contamination of the platinum catalyst, resulting in the inability of silica gel to cure. So when the temperature drops, it is necessary to raise the ambient temperature, and heating measures can also be taken. In addition, it is necessary to ensure the hygiene and cleanliness of the operating environment.

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