All silicone rubber products need to be vulcanized because silicone rubber has high application value after vulcanization, greatly improving its mechanical properties. It has the characteristics of constant viscosity, not easy to break, high elasticity, high temperature resistance, high tensile strength, and is insoluble in water in organic solvents. Of course, not all require vulcanization. Some thermoplastic silicone does not require vulcanization, but natural rubber and synthetic silicone rubber require the use of vulcanizing agents for vulcanization. The vulcanization of silicone rubber is divided into two stages: the first stage is divided into raw rubber, reinforcing agent, additive, vulcanizing agent, and structure control agent for raw material mixing to obtain silicone rubber raw materials, which are then mixed into semi-finished materials; In the second stage, the materials and finished products are placed into the hardware mold and subjected to heat molding, extrusion, extrusion, injection and other processes. The machine is subjected to force and the product is catalyzed and fixed, and the mold is formed at high temperature!
During the vulcanization process of silicone rubber,? There are several common vulcanization processes for silicone rubber products:
1γ The vulcanization process of silicone rubber can be divided into three methods: direct vulcanization, indirect vulcanization, and mixed gas vulcanization, depending on the vulcanization medium and vulcanization method.
1. Direct vulcanization: Put the product directly into hot water or steam medium for vulcanization.
2. Indirect vulcanization: Place the product in hot air for vulcanization, which is usually used for certain products with strict appearance requirements, such as rubber shoes.
3. Mixed air vulcanization, first using air vulcanization, and then using steam direct vulcanization. This method can overcome the drawbacks of steam vulcanization affecting the appearance of products, as well as the drawbacks of slow heat transfer, long vulcanization time, and easy aging caused by hot air.
2γ According to different vulcanization processes, silicone rubber products can be divided into cold vulcanization, room temperature vulcanization, and hot vulcanization.
1. Cold vulcanization: Cold vulcanization can be used for the vulcanization of thin film products. Rubber products are immersed in a carbon disulfide solution containing 2% to 5% sulfur chloride, and then washed dry with water.
2. Room temperature vulcanization: When room temperature vulcanization is carried out, the vulcanization process is carried out at room temperature and normal pressure, such as using room temperature vulcanization adhesive (mixed rubber solution) to repair and repair the joints of bicycle inner tubes.
3. Heat vulcanization: Heat vulcanization is the main vulcanization method for silicone rubber products.
High Resilience Fumed Type Silicone Rubber 
