Strip also known as sealing strip, the pimp, rubber strip. Is not the same in accordance with the original data can be divided into natural rubber sealing strip, epdm sealing strip, PVC rubber sealing strip and silica gel products, etc. Now I will introduce a few seals the function of the offer.
Natural rubber sealing strip using quantity is less, the price is higher. Compared with most of synthetic rubber, natural rubber has outstanding inductive mechanics function, cold resistance, high resilience and abrasion resistance. Natural rubber is not resistant to mineral oils, but relatively stable in the vegetable oil and alcohols. In terms of n-butyl alcohol mixed with refined castor oil liquid of hydraulic braking system of the brake fluid as seal rubber cup, aprons are made of natural rubber, usually commonly used natural rubber sealant can make
Epdm sealing strip has good elasticity, surface lubrication, use the mercy is 14 years of life, high capital, high quality epdm seal can take back, about the company, can also is a way of reducing capital. Epdm seal of the high and low temperature resistance, good weather resistance, aging resistance, corrosion resistance. Conductive flame retardant insulation.
Epdm main chain is not completely full of straight chain containing double bond type structure, its side chain on the diene hengjing, so is available sulphur vulcanization. Epdm has excellent aging resistance, ozone resistance, weatherability, heat resistance (at 120 ℃ environment medium and long-term use), resistance to change study sex (such as alcohol, acid, alkali, oxidant), but not resistant species of aliphatic and aromatic solvents. Epdm rubber in medium density is the most low is characteristic of high fill, but the lack of the viscosity and viscosity. In addition, epdm has outstanding resistance to the steam function, can be made resistant to steam diaphragm seal products. Epdm has been widely used in washing machines, TV sets in the accessories and door seal products, or in the production of a variety of complex profile strip.
Poor elasticity of PVC rubber sealing strip, can't take back, use fixed number of year is shorter, usually 1-7 years at the mercy of, not environmental protection. The capital is low. Not resistant to heat.
Silica gel products offer is 45-60 yuan/kg. Silicone rubber has excellent high and low temperature resistant, resistant to ozone and weather aging resistance function, in 70 ~ 260 ℃ temperature range will stick to its peculiar using elastic and ozone resistance, weather resistance and other advantages, is suitable for manufacturing the gasket in hot organization, such as strong light source lamp shade seal ring gasket, valve pad, etc. Because silicone rubber oil resistant, mechanical strength, low price is expensive, therefore should not be made oil seal products.