Methods for reducing the shrinkage rate of silicone gel

The serious shrinkage of silicone is mainly due to the quality problem of the silicone itself. If the quality is not up to standard, it is normal for the shrinkage rate of the flipped silicone extracted with powder or waste rubber to be serious. liquid silicone for molds So to reduce the shrinkage rate of silicone, it is necessary to use high-quality, well-known brands, and legitimate silicone manufacturers to produce silicone. liquid silicone for mold making, The shrinkage rate of condensed silicone is ≤ 3 ‰ and the shrinkage rate of added silicone is ≤ 1 ‰.

It can also slow down the occurrence of shrinkage during the flipping operation. For example, adding fiber cloth and gauze after pouring glue during the flipping process can increase the toughness of the silicone mold and also slow down the shrinkage rate. When adding fiber cloth and gauze, it is important to note that it should be added before the liquid mold silicone is vulcanized, and it should be in contact with the silicone. Use a brush to press it as much as possible to make it adhere to the silicone. Fiberglass and gypsum can also be used to create a better shell effect.

In addition to the quality and operation of silicone, there is also one thing that is easily overlooked, which is the issue of preserving the flipped silicone. Some customers, for the sake of convenience, simply place the silicone gel on the mold after use and even fold it up. Incorrect placement can also cause severe shrinkage of the silicone gel in the flipping mold. After use, the silicone gel for flipping the mold needs to be cleaned thoroughly. The mold can be used as a filler with the mold or gypsum to fill the mold and prevent deformation and shrinkage. It also needs to be stored in a cool and direct sunlight-free place.
When unsure about the shrinkage of newly purchased liquid mold silicone, sample testing can be conducted first before bulk procurement. Regular mold-flipping silicone manufacturers can provide free sample testing of mold-flipping silicone and can produce mold-flipping silicone that is suitable for your operation and use according to your usage requirements, habits, product performance requirements, etc.