Brief Introduction and Comparison of Raw Materials for Rubber Sealing Strips

(1) EPDM sealing strip

Has excellent comprehensive performance, ozone resistance, weather resistance, high temperature resistance, low temperature resistance, chemical resistance, multiple solutes resistance, and low relative density. The disadvantage is that the expansion amount in general mineral oil and lubricating oil is large, which is generally dark products. The operating temperature range is - 60~+150 ℃. It can be applied to high temperature, cold, coastal areas, areas with strong ultraviolet radiation, and medium and high-rise buildings. With its wide application scope and excellent comprehensive performance, it has been recognized by the door and window industry at home and abroad

(2) Silicone rubber sealant strip

has outstanding high and low temperature resistance, ozone resistance and weather resistance; Hydrophobicity and proper air permeability; With insulating property; It can meet the hygienic level of food hygiene requirements and meet the requirements of various colors. The disadvantage is that the mechanical strength is poor in rubber materials, and it is not oil resistant

Operating temperature range: - 100~+300 ℃. It can be applied to high temperature, cold, strong ultraviolet radiation areas and medium and high-rise buildings

(3) Compared with other special rubbers, individual properties of neoprene sealant strips are worse, but the overall performance is well balanced. It has excellent weather resistance, ozone resistance, heat aging resistance, oil and solvent resistance, good chemical resistance, excellent flame resistance and good adhesion. Poor storage stability, hardening phenomenon will occur during storage, and poor cold resistance. The relative density is high. Generally black products It is used in oil resistant, heat resistant and demanding environment. The operating temperature range is - 30~+120 ℃

(4) Acid and alkali: nitrile rubber sealing strip

Its main characteristics are oil resistance and solvent resistance, but it is not resistant to ketone, ester, chlorinated hydrocarbon and other media. Its elasticity and mechanical properties are very good. The disadvantage is that it is easy to age and crack in ozone and oxidation, and has poor cold resistance and low temperature resistance. Use temperature range - 30~+120 ℃

(5) Polyurethane rubber sealing strip It has good elasticity, excellent wear resistance, good oil resistance, wide adjustable hardness range (Shore A hardness 65~80 degrees), superior mechanical properties (tensile strength, elongation at break), excellent cold resistance and chemical resistance, and high price of raw materials. It is a recyclable material. It can meet the requirements of various colors. The operating temperature range is - 60~+80 ℃. It is applicable to areas with strong vibration such as earthquake prone areas, areas near railways or factories with high-power cranes, and areas with strong ultraviolet radiation

(6) Thermoplastic vulcanizate

The sealant strip has the flexibility and elasticity of rubber. It can be produced by plastic processing method without vulcanization. The waste can be recycled and reused. It is a material with a wide range of properties. It has good heat resistance and cold resistance, low relative density, similar oil resistance and solvent resistance to neoprene, and poor compression deformation resistance and wear resistance. It can meet the requirements of various colors

The use temperature range is - 40~+150 ℃. It can be applied to cold and medium and high-rise buildings& nbsp; (7) Plasticized PVC sealant strip

The material is cheap and easy to get, with corrosion resistance, abrasion resistance, acid and alkali resistance and various chemical media, combustion resistance, and high mechanical strength; The disadvantage is that the plasticizer in the coordination system is easy to migrate, becomes hard and brittle with time, loses elasticity, is not resistant to aging, and has poor weather resistance and low temperature performance. Generally dark products& nbsp; It is suitable for occasions where the light is not strong, the temperature changes little, and the weather conditions are not bad

(8) The surface coating material

is to coat polyurethane, organic silicon, polytetrafluoroethylene and other substances on the surface of the sealing strip to replace the surface flocking of the traditional process. The coated sealing strip has good wear resistance and smoothness, especially the sealing strip coated with silica gel surface coating has small surface friction coefficient, which is conducive to the sliding of door and window leaves& nbsp; It is applicable to doors and windows with sliding doors and window sashes. It is a substitute for traditional silicified wool top