All silicone rubber products should be vulcanized, because silicone rubber after vulcanization has a higher application value, mechanical properties are greatly improved, with unchanged viscosity, not easy to break, large elasticity, high temperature resistance, high tensile strength, insoluble in water in organic solvents and so on. Of course, not all need to vulcanize, like some thermoplastic silicone does not need to vulcanize, but natural rubber and synthetic silicone rubber is the need to use vulcanizing agent to vulcanize.

Silicone rubber vulcanization is divided into two stages: the first stage is divided into raw rubber, reinforcing agent, additive, vulcanization agent and structure control agent for raw material mixing, silicone rubber raw materials, raw materials allocation for semi-finished materials; In the second stage, the materials and finished materials are put into the metal molding by hot molding, extrusion, extrusion, injection and other processes, to the machine force and product catalytic fixed-line, molding through high temperature molding!

In the process of vulcanizing silicone rubber,? The common vulcanization process of silicone rubber products is as follows:

First, silicone rubber vulcanization process can be divided into direct vulcanization, indirect vulcanization and mixed gas vulcanization three methods, which depends on the vulcanization medium and vulcanization method.
1, direct vulcanization: the product directly into hot water or steam medium for vulcanization.
2, indirect vulcanization: the product is placed in hot air vulcanization, this method is usually used for some products with strict appearance requirements, such as rubber shoes.
3, mixed gas curing, the first use of air curing, and then direct curing steam. This method can not only overcome the steam curing effect on the appearance of the product shortcomings, but also overcome the hot air heat transfer slow, curing time long, easy aging and other shortcomings.

Two, according to the vulcanization process, silicone rubber products can be divided into cold vulcanization, room temperature vulcanization and hot vulcanization.
1, cold vulcanization: cold vulcanization can be used for curing film products, the rubber products immersed in carbon disulfide solution containing 2%~5% sulfur chloride, and then wash dry with water.
2, room temperature vulcanization: when room temperature vulcanization, the vulcanization process is carried out at room temperature and pressure, such as room temperature vulcanization slurry (rubber solution) for bicycle tube joints, repair, etc.
3, hot vulcanization: hot vulcanization is the main vulcanization method of silicone rubber products.