During the production process, it will be found that the silica gel products are brittle and easy to break, which seriously affects the production, and the service life of the brittle silicone rubber products can not meet the requirements. So, what are the reasons for the brittleness of silicone products?

1、 Silicone product structure or mold design makes the product easy to crack.
The product structure or mold design is unreasonable, which causes the silicone products to be easily broken during molding,
Solution: Modify the structure of the product or mold to achieve improvement, for example: thicken the too thin part slightly, and fillet the right angle slightly.

2、 Too high molding temperature or too long vulcanization time will result in the brittleness of silicone products.
Solution: reduce the temperature to control the curing time.

3、 The silicone rubber products are brittle due to poor ventilation or high temperature during secondary sulfur addition.
Solution: pay attention to adjusting the ventilation and temperature control of secondary sulfur addition.

4、 Raw material of silicone rubber itself.
The main reason for the brittleness of silica gel products is the rubber itself. Generally, the brittleness of silica gel products is due to the poor quality of the rubber itself, and the tear strength does not meet the requirements. In addition, many manufacturers of silica gel products are now filling the rubber with silica fume to reduce costs, which leads to the brittleness of the rubber materials with the original tear strength not meeting the requirements.

Solution: Use pure rubber without silicon powder for production. For those with higher requirements, use large brand rubber for production. Special products may also be produced with high tensile adhesive (weather adhesive) to meet the tear strength requirements.

For silicone rubber, please check the details:
https://www.siliconerubbers.net/product-general-grade-htv-silicone-rubber.html