Processing and manufacturing products mainly made of silicone gel are called silicone products. Silicone gel is a porous material made by dehydrating silica gel with different particle sizes. It has an open porous structure and can absorb many substances, making it a good desiccant, adsorbent, and catalyst carrier. Silicone products are very common in daily life and have excellent performance as well as being safe and environmentally friendly, making them very popular among customers. However, silicone products may encounter some minor issues such as yellowing and cracking. So how to solve the problem of cracking in silicone products?
We can use silicone adhesive to repair them. First, prepare the silicone adhesive and repair tools. Clean the damaged surface to prevent leaving stains that may affect the appearance. Apply a layer of glue evenly on both cut surfaces. Finally, apply a thin layer of glue on the surface, wait for about half an hour for the glue to dry and solidify, and then the silicone product can be used again. So why do silicone products have this issue? In fact, not all silicone products will have this problem. The cracking of silicone products is mainly related to the following factors:
The poor quality of silicone raw materials and their poor performance, such as low toughness, can easily lead to cracking. Therefore, the quality of silicone raw materials must be carefully controlled.
The incomplete sulfurization of silicone products during the molding process. When the mold temperature is too low or the sulfurization time is too short, the product will adhere tightly to the mold and it will be difficult to demold, resulting in possible cracking. Therefore, the temperature during sulfurization needs to be increased or the sulfurization time needs to be extended.
The temperature during molding of silicone products is too high, which makes the products brittle and prone to cracking during demolding. Therefore, lowering the molding temperature is necessary.
The surface of the mold used for molding silicone products is too rough or dirty, which makes demolding difficult and can cause cracking. Cleaning or plating the mold is necessary.
Sometimes, irregular demolding methods by operators can easily lead to various problems. Therefore, professional training for demolding workers is necessary.
Mold reasons: For example, for foam silicone strips, excessive dirt on the surface of the mold or roughness that is not conducive to mold cavity demolding can cause mold cracking.
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