Epdm sealing strip
It has excellent comprehensive performance, including ozone resistance, weather resistance, high a nd low temperature resistance, chemical resistance, resistance to various solutes, a nd a relatively low density. The drawback is that it has a large expansion volume in common mineral oil a nd lubricating oil, a nd is usually a dark-colored product. The operating temperature range is -60 to +150℃. It can be applied to high-temperature, cold, coastal areas, regions with strong ultraviolet radiation, a nd medium a nd high-rise buildings. With its wide application range a nd excellent comprehensive performance, it has been recognized by the domestic a nd international door a nd window industry.
(2) Silicone rubber sealing strips
It has outsta nding high a nd low temperature resistance, ozone resistance a nd weather resistance. Some hydrophobicity a nd appropriate air permeability; It has insulating properties; It can meet the hygiene level requirements for food hygiene a nd satisfy the requirements of various colors. The drawback is that its mechanical strength is poor among rubber materials a nd it is not oil-resistant. The operating temperature range is -100 to +300℃. It can be applied to areas with high temperature, cold, strong ultraviolet radiation a nd medium a nd high-rise buildings.
(3) Neoprene rubber sealing strips
Compared with other special rubbers, some individual properties are slightly inferior, but the overall performance balance is good. It has excellent weather resistance, ozone resistance, heat aging resistance, oil a nd solvent resistance, good chemical resistance a nd outsta nding flame retardancy, as well as good adhesion. Poor storage stability, hardening may occur during storage, a nd it has poor cold resistance. The relative density is relatively large. It is generally a black product. It is suitable for environments that require oil resistance, heat resistance a nd high dema nd, with an operating temperature range of -30 to +120℃.
(4) Nitrile rubber sealing strips are required for acid a nd alkali.
The main features are oil resistance a nd solvent resistance, but not resistant to ketones, esters a nd chlorinated hydrocarbons a nd other media. It has excellent elastic a nd mechanical properties. The drawback is that it is prone to aging a nd cracking in ozone a nd oxidation, a nd has poor cold resistance a nd low-temperature resistance. Operating temperature range: -30 to +120℃
(5) Polyurethane rubber sealing strips have good elasticity a nd excellent wear resistance, good oil resistance, a wide range of adjustable hardness (hardness 65 to 80 degrees), superior mechanical properties (tensile strength, elongation at break), excellent cold resistance a nd resistance to chemical cross-corrosion, but the price of raw materials is relatively high. It is recyclable a nd reusable material. It can meet the requirements of various colors. The operating temperature range is -60 to +80℃. It is suitable for areas with frequent earthquakes, near railways or factories equipped with high-power cranes a nd other regions with strong vibrations, as well as areas with intense ultraviolet radiation.
(6) Thermoplastic vulcanized rubber
Sealing rubber strips possess the flexibility a nd elasticity of rubber a nd can be produced by plastic processing methods without vulcanization. The waste materials can be recycled a nd reused. It is a material with a wide range of performance, good heat resistance a nd cold resistance, low relative density, a nd oil resistance a nd solvent resistance similar to those of chloroprene rubber. However, its resistance to compression set a nd wear is not very good. It can meet the requirements of various colors. The operating temperature range is -40 to +150℃, a nd it is suitable for cold environments as well as medium a nd high-rise buildings.
(7) Plasticized polyvinyl chloride sealing strips
The material is inexpensive a nd readily available, featuring corrosion resistance, wear resistance, acid a nd alkali resistance, resistance to various chemical media, flammability, a nd high mechanical strength. The drawback is that the plasticizer within the compounding system is prone to migration, becomes hard a nd brittle over time, loses elasticity, is not resistant to aging, a nd has poor weather resistance a nd low-temperature performance. It is generally a dark-colored product.
(8) Surface coating materials
Polyurethane, silicone, polytetrafluoroethylene a nd other substances are coated on the surface of the sealing strip to replace the traditional surface flocking process. The coated sealing strips have good wear resistance a nd smoothness. Especially the sealing strips coated with silicone surface layer paint have a small surface friction coefficient, which is conducive to the sliding of door a nd window sashes.