All silicone rubber products must be vulcanized because silicone rubber has higher application value after vulcanization, and its mechanical properties are greatly improved. It is not sticky, not easy to break, has high elasticity, high temperature resistance, and high tensile strength. It is used in organic materials. The solvent is insoluble in water and other characteristics. Of course, not all of them need to be vulcanized. For example, some thermoplastic silicones do not need to be vulcanized, but natural rubber and synthetic silicone rubber need to be vulcanized using vulcanizing agents.

Silicone rubber vulcanization is divided into two stages: the first stage is divided into raw rubber, reinforcing agents, additives, vulcanizing agents and structural control agents to mix raw materials to obtain silicone rubber raw materials, which are blended into semi-finished materials; the second stage is The material and finished product are put into the hardware mold and subjected to heat molding, extrusion, extrusion, injection and other processes. With the force of the machine and the catalytic fixation of the product, the molding undergoes high-temperature molding!

In the process of silicone rubber vulcanization, the common vulcanization processes of silicone rubber products are as follows:

1. The silicone rubber vulcanization process can be divided into three methods: direct vulcanization, indirect vulcanization and mixed gas vulcanization, which depend 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: The product is placed in hot air for vulcanization. This method is usually used for some products with strict appearance requirements, such as rubber shoes.
3. Mixed air vulcanization, first use air vulcanization, and then use steam to directly vulcanize. This method can not only overcome the shortcomings of steam vulcanization affecting the appearance of the product, but also overcome the shortcomings of slow heat transfer by hot air, long vulcanization time, and easy aging.

2. 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 to vulcanize film products. The 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, the vulcanization process is carried out at room temperature and normal pressure. For example, room temperature vulcanization glue (mixed rubber solution) is used for joints and repairs of bicycle inner tubes.
3. Thermal vulcanization: Thermal vulcanization is the main vulcanization method of silicone rubber products.