What should we do if silicone rubber products appear white blocky

First of all, we should eliminate the problem of whether it is a silicone mold. We should continue to use the current mold and replace it with different adhesives, such as high tear resistant adhesives. If this method solves the white block problem, then we can eliminate the problem of silicone mold.

After excluding the problems of silicone mold and rubber compound, we will find a solution to the silicone production process and silicone production equipment.

To sum up: from the above figure, it is not difficult for us to see that the silicone rubber product is trapped or gassy. After the surface is vulcanized, the interior of the product is not mature, resulting in gas trapped and unable to be discharged, resulting in white block problems.

In the following, for the problem of gas trapping or suffocation of silicone rubber products, Rongjin silicone rubber products manufacturer provides several solutions (for reference only):

1. Material selection. The selection of rubber may be too poor. The rubber should be better according to the price and goods.

2. The powder vulcanizing agent may disperse during mixing, resulting in insufficient proportion of vulcanizing agent to material.

3. Return the raw materials, reduce the roll spacing, and crucify or triangle at least 20 times;

4. After mixing the raw materials, let them stand for more than 8 hours before discharging and cutting;

5. Increase the exhaust, or manually pry mold auxiliary exhaust, or add spring auxiliary exhaust;

6. Before molding and pressurization, spray an appropriate amount of water on the surface of raw materials with a watering can to enhance the exhaust effect;

7. If the white block has been vulcanized, try to reduce the temperature appropriately. It may be high-temperature wind, that is, the air has not been discharged in time, the surface has been vulcanized, and the air can only be held inside;

8. There is a problem with the vacuum machine. Replace the vacuum machine.