SiSiB silicone rubber elastomers have excellent properties, such as heat and moisture resistance, flame retardancy, weather resistance and dielectric properties. They have been ideal candidates for industrial, power transmission, transportation and consumer applications.
SiSiB offers a broad portfolio of high consistency rubber (HCR), liquid silicone rubber (LSR), fluoro silicone rubber (FSR) and RTV-2 silicone rubber for mold-making.
SiSiB HCR products include peroxide and platinum cured silicone elastomers, which can be processed by traditional methods such as extrusion, calendering, compression and transfer molding, or injection molding.
SiSiB addition type silicone elastomer is platinum-catalyzed silicone rubber. The platinum-catalyzed reaction is much faster than the reaction initiated by peroxide. It improves productivity and does not produce any toxic by-products. It can improve the mechanical properties of the product (good elongation at break / tear strength / compromise of compression set).
SiSiB fluoro silicone rubber (FVMQ, FSR) is a durable elastomer that remains stable and low compression set at extreme temperatures. Fluorosilicone rubber contains trifluoropropyl groups, which enhances its resistance to non-polar solvents, fuels, oils, acids and alkaline chemicals. Because of the unique properties, it is widely used in aerospace, automotive, industrial, and aviation applications for static sealing and cushioning. Fluorosilicone is ideal for static sealing applications, but it is not recommended for dynamic sealing operations because of its limited physical strength, high coefficient of friction, and low abrasion resistance. Typical applications include aerospace fuel system components, diaphragms, gaskets, hose lining, seals and O-rings.
SiSiB LSR is a two-component, platinum (addition/heating) curing silicone elastomer. One component contains platinum catalyst and the other component contains methyl hydrogen siloxane as a crosslinking agent and inhibitor. LSR can be molded and cured at high temperature, LSR also has quick cycle times and less raw material handling. The molding process allows for complex part geometries and precise dimensions.
Compared with heat curing rubber (HCR), liquid silicone rubber (LSR) has excellent processing performance, and has benefits such as productivity, precision, biocompatibility and long-term stability. But LSR can only be catalyzed by platinum; HCR can use peroxide or platinum curing process.
SiSiB RTV-2 is a two-part, room-temperature curing silicone rubbers designed for mold-making. It offers great flexibility, tear strength, chemical resistance, and release properties. Silicone molds can be used to cast a variety of materials, including polyurethane, polyester and epoxy resins, polyurethane foam, plaster, wax, concrete, and low melting metals etc. SiSiB offers both condensation curing and addition curing type RTV-2.
As a professional manufacturer in China, SiSiB provides customized silicone rubber products and relevant mold making materials, to meet strict specifications and demanding application requirements. Our custom silicone rubber compound polymer for casting and mold making can be made heat resistant,high consistent, thermally conductive, electrically conductive, pourable/pouring non toxic, gluing adhesive, clear translucent, elastic vulcanized, platinum catalyzed, addition tin cured, condensation fast cured, with high voltage, high temperature, low viscosity, etc. Various types of silicone rubber products by SiSiB factory, such as silicone mold rubber tubing, sheet and cord, are designed for different uses, with corresponding solution. For more information like the price per kg of hard/solid silicone rubber raw materials, please contact us. Buy products of high quality for sale in bulk, and get comparatively cheap wholesale price from our company, very cost effective.
As they say in those famous shampoo adverts: ‘here is the science bit’. Silicones are polymers, which are large molecules composed of many repeated sub-units. These polymers are made up of siloxane – a chain of alternating silicon atoms and oxygen atoms frequently combined with carbon and/or hydrogen. Silicon is an element found in sand, where it is extracted from and passed through hydrocarbons.
Being made from sand means that silicon is the second most abundant element on Earth, yet despite being readily available the cost is relatively high in comparison to other rubbers such as natural rubbers, Neoprene and EPDM. The reason for this is that the process of converting sand into silicon is expensive. Furthermore, while it is popular, silicone is not used as widely as some other materials so the economies of scale are low. For many businesses, though, the cost of silicone is easily justified as it’s the best in class elastomer for extreme temperature environments where other rubbers simply can’t function. We have examined the reasons for the high cost of silicone in more detail on our blog post ‘Why is silicone classed as premium rubber?’.
Silicone rubber is an elastomer and is non-reactive, stable and resistant to extreme environments and temperatures. Due to these characteristics, silicone is frequently used in Rail, cars, , aircraft , electronics and HVAC systems.
What makes silicone so popular for use in so many products and applications is the wide variety of temperatures it can withstand whilst maintaining its properties and physical structure. Silicone is ideal for use in continuous temperatures as low as -60°C to as high as around 230°C. However, the amount of time spent in extreme temperatures beyond these values is important. Silicone cannot withstand the highest or lowest temperatures for too long. We have written more about this in our blog post ‘What temperatures can silicone rubber withstand?’.
The shelf life of your silicone product will be affected by several different factors. For example, placing your silicone product in perfect temperature controlled conditions would give it a long shelf life, generally up to 10 years. However, exposing it to extreme temperatures will degrade the material over time and therefore reducing the shelf life. We have explored this issue in more detail in our blog post: ‘What is the shelf life of a silicone product?’
EPDM is frequently black, there are no noticeable visual differences between silicone and EPDM from an aesthetic view point, you can colour EPDM like silicone but you usually find the material being produced in a black or dark grey.
You can tell the difference between Silicone and EPDM by exposing a small piece to a naked flame, EPDM would burn with a black ash and black smoke whilst silicone would burn with a white ash and white smoke. The white ash and white smoke released by the silicone are actually silicon dioxide.
The white smoke is much lower in toxicity compared to other rubbers, the main item of combustion of silicone rubber is silicon dioxides.
Also, silicone rubbers tend to be easier to cut with a knife, and are easier to bend than an equivalent sized piece of EPDM.
Latex is an organic rubber, the type that is extracted from the Pará rubber tree (Hevea brasiliensis), a member of the spurge family. In regards to latex's physical properties the rubber is super stretchy, very high tensile strength and mechanical strength but on the flipside is very vulnerable to heat! Environmental exposure latex doesn't hold up too well when exposed to the elements, UV light and general wreathing degrade the material rapidly under conditions that silicones can withstand for years.
When it comes to service temperature range there's no comparison, silicones can happily survive at extremes of both high and low temperature that would destroy a sample of latex.
Silicone rubber is frequently used in the following sectors
Communication Infrastructure (EMI)
Food & Beverage
Heat press and vacuum forming
Oil and Gas