We are no stranger to rubber straps.Silicone watch, the silicone used is the new favorite of the strap material, often appears in sports watches and diving watches. On the surface, this strap is similar to a traditional rubber strap, but it seems to be different.
Silica gel is a huge family, divided into inorganic silica gel and organic silica gel. Inorganic silica gel is a highly active adsorbent material, usually prepared by reacting sodium silicate and sulfuric acid, and undergoing a series of post-treatment processes such as aging and acid foaming. Its main component is silica, which is structured like a sponge. The interconnected pores constitute a capillary adsorption system with a large surface area, which can adsorb and condense water vapor equivalent to 40% of its own weight, and therefore is mostly used for desiccant. Although inorganic silica gel is not used to make watch bands, it is often used in the care of watches. Just put the watch with silicone particles and water in a closed container and take it out after a few hours. It will all disappear.
Our daily use is more organic silicone, which is divided into silicone rubber, silicone and silicone oil, which is a special rubber in synthetic rubber. The material commonly used in watch bands is a small branch of the silicone family, room temperature vulcanized silicone rubber (RTV) in silicone rubber.
The raw materials for the production of silicone rubber are silicon powder, methanol and hydrochloric acid, which can be finally obtained through a series of complicated chemical processes. This silicone rubber is also called "liquid silica gel" because it has a low molecular weight and is liquid at room temperature. After mixing the cross-linking agent and the platinum catalyst in the liquid silica gel, it is injected into the mold, and after a period of vulcanization reaction, it can be solidified and formed (it can be reacted at room temperature, so it is called room temperature vulcanized silicone rubber, and can be heated slightly). Increase the reaction speed). And form the final product. Adding different additives allows the silicone material to have different specific gravity, hardness, strength, color and texture.