Organic silica gel is an organosilicon compound, which refers to a compound that contains Si-C bonds and at least one organic group is directly connected to a silicon atom. It is customary to use oxygen, sulfur, nitrogen, etc. to make the organic group and silicon Compounds with connected atoms are also regarded as organosilicon compounds. Among them, the polysiloxane composed of silicon-oxygen bond (-Si-O-Si-) is the largest, most researched, and most widely used type among organosilicon compounds, accounting for more than 90% of the total amount.
Silicones are mainly divided into four categories: silicone rubber, silicone resin, silicone oil, and silane coupling agent.
Silicone products can be divided into three categories according to different molding processes
1. Molded silicone products
Molded silica gel products are usually made by using a high temperature mold to put solid silica gel raw materials added with a vulcanizing agent into a vulcanizing machine to apply pressure, and the high temperature sulfur is solidified. The hardness of the molded silica gel is usually 30°C-70°C. The raw materials are matched with the color paste to adjust the color according to the Pantone color card number. The shape of the mold determines the shape of molded silicone products. Molded silicone products are the most widely used in the silicone industry. Mainly used to make silicone industrial accessories, buttons, silicone gifts, silicone bracelets, silicone watches, key cases, mobile phone cases, silicone kitchenware, silicone mats, ice trays, cake molds, etc.
2. Extruded silicone products
Extruded silica gel products are usually formed by extruding silica gel through an extrusion machine. Generally, the shape of the extruded silica gel is long, and the tubular shape can be cut. However, the shape of the extruded silica gel has limitations and is widely used in medical equipment and food machinery. use.
3. Liquid silicone products
Liquid silicone products are molded by injection molding of silicone. The products are soft and have a hardness of 10°C-40°C. Because of their softness, they are widely used in simulating human organs, medical silicone breast pads, and so on.
4. Special silicone products
Special silicone products are based on the chemical properties of silica gel or the addition of some auxiliary materials. Special silicone products can also have high temperature resistance (up to 330 degrees), food grade (fully comply with US FDA, LFGB standards), medical grade, and flame retardant grade. By adding auxiliary materials, it can also have luminous, negative ions, discoloration, and other characteristics.