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Silicone rubber products advantages and its application
Updated : 2012-08-04     Hits : 3087
Silicone rubber By the linear polysiloxanes are incorporated into the reinforcing filler, under heat and pressure to generate special synthetic elastomer sulfide. It perfectly balanced mechanical properties and chemical properties, which can meet today many demanding applications. Silicone rubber in the field of excellence: High and low temperature stability Inert ( odorless ) Transparent, easy to color Hardness range is wide, 10-80 shore hardness Chemical resistance Good sealing performance Electrical properties Resistance to compressive deformation In addition to the superior performance, and compared to conventional organic elastomer, silicone rubber is also particularly easy for processing and manufacturing. Silicone rubber is easy to flow, which can lower energy consumption situation, rolling, extrusion molding. Easy processing also means high production efficiency. The silicone rubber can be in the following form: Mix: this ready-to-use materials according to your processing equipment and end use of color and catalysis. Base material: this kind of organosilicon polymer also contains a reinforcing filler. The rubber base material can be further and pigments and additive mixing, forming compound, meet your color and other manufacturing requirements. Liquid silicone rubber ( LSR ): the double-component liquid rubber system can pump input appropriate injection molding equipment, and then heat curing of molded rubber parts. Fluorinated silicone rubber and fluorosilicone rubber base material: maintaining many of the key properties of silicone, in addition, it also has excellent resistance to chemicals, fuel and oil resistant. Combined with silicone rubber by vulcanization mechanism can be divided into three categories: organic peroxide-initiated free-radical crosslinking, condensation reaction, addition reaction type. Ingredients include: reinforcing agent, curing agent and some special additives, general 5~6 fractions can be formed into the practical formula. Formulation design and points for attention: 1 silicone rubber is high saturation of rubber, usually without sulfur vulcanization, using heat curing, heat vulcanized by organic peroxide vulcanizing agent, therefore, do, must not contain with peroxide decomposition products of active substances ( such as groove black, some organic promoter and antioxidant ), otherwise it will affect the vulcanization. 2 silicone products generally used in high temperature, the agent should be maintained at a high temperature stability, this usually made of inorganic oxides as reinforcing agent. 3 silicone rubber in a trace of acid-base and other polar chemical reagent under the action of easy cause siloxane cracking and rearrangement, resulting in decreased thermal stability of silicone rubber. So the selection of complexing agents must be considered when its acidity, while also considering peroxide decomposition products of acidity, so as not to affect the properties of the vulcanizate. ( silicone rubber for nonpolar rubber ) Combined with silicone rubber by vulcanization mechanism can be divided into three categories: organic peroxide-initiated free-radical crosslinking, condensation reaction, addition reaction type. Ingredients include: reinforcing agent, curing agent and some special additives, general 5~6 fractions can be formed into the practical formula. Formulation design and points for attention: 1 silicone rubber is high saturation of rubber, usually without sulfur vulcanization, using heat curing, heat vulcanized by organic peroxide vulcanizing agent, therefore, do, must not contain with peroxide decomposition products of active substances ( such as groove black, some organic promoter and antioxidant ), otherwise it will affect the vulcanization. 2 silicone products generally used in high temperature, the agent should be maintained at a high temperature stability, this usually made of inorganic oxides as reinforcing agent. 3 silicone rubber in a trace of acid-base and other polar chemical reagent under the action of easy cause siloxane cracking and rearrangement, resulting in decreased thermal stability of silicone rubber. So the selection of complexing agents must be considered when its acidity, while also considering peroxide decomposition products of acidity, so as not to affect the properties of the vulcanizate. ( silicone rubber for nonpolar rubber ) Silicone adhesive silicone adhesive is resistant to high temperature and high strength glass fiber cloth, made of silicone rubber with special composite technology into. Is a high performance, multiple use of composite materials. Has been widely used in aerospace, chemical, petroleum, large power generating equipment, machinery, metallurgy, electrical insulation, construction and other fields. Silicone rubber fiberglass cloth, main performance characteristics: 1, good high temperature resistance, low temperature performance, suitable for the working environment temperature range of -70℃ ~280 ℃; good insulation properties. In 2, high strength; soft and tough, can be cut and processed. In 3, chemical corrosion resistance; oil resistance, waterproof [ scrub ]. 4, ageing resistance and weathering resistance, and resistance to ozone, oxygen, light etc.. In 5, with high insulating property, dielectric constant of 3~3.2 20~50kv/mm, breakdown voltage.
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