Pe Gasket Factory introduces the common sense of maintenance of different rubber sealing strips:
1. Vulcanized rubber seal strip
Generally, it is made of EPDM. Excellent comprehensive performance, outstanding ozone resistance, excellent weather resistance, good high temperature and low temperature resistance, outstanding chemical resistance, ability to withstand a variety of polar solutes, and low relative density. The disadvantage is that it has a large amount of expansion in general mineral oil and lubricating oil, and it is generally a dark product. The working temperature range is -60～150℃. With its wide application range and excellent comprehensive performance, it has been recognized by domestic and foreign industry enterprises.
2. Silicone rubber sealing strip
It has outstanding high and low temperature resistance, ozone resistance and weather resistance; it has excellent hydrophobicity and proper air permeability; it has unparalleled insulation performance; it can meet the hygienic level required by food hygiene and can meet the requirements of various colors. The disadvantage is that the mechanical strength is the worst among rubber materials, and it is not resistant to oil. Use temperature range -100～300℃. It can be applied to areas with high temperature, cold, strong ultraviolet radiation and medium and high-rise buildings.
3. Neoprene sealing strip (CR)
Compared with other special rubbers, individual properties are poorer, but the overall performance balance is good. It has excellent weather resistance, ozone resistance, heat aging resistance, oil and solvent resistance, good chemical resistance and excellent flame resistance, and good adhesion. The storage stability is poor, hardening will occur during storage, and the cold resistance is not good. relatively high density. Generally black products. It is used in environments requiring oil resistance, heat resistance, acid and alkali resistance. Use temperature range -30～120℃.
4. Nitrile rubber sealing strip
The main feature is oil resistance and solvent resistance, but it is not resistant to media such as ketones, esters and chlorinated hydrocarbons, and has good elasticity and mechanical properties. The disadvantage is that it is easy to age and crack in ozone and oxidation, and its cold resistance and low temperature resistance are poor.
5. Thermoplastic elastomer sealant strip
It has good elasticity and excellent wear resistance, good oil resistance, wide adjustable range of hardness (Shore A hardness 65-80 degrees), superior mechanical properties (tensile strength, elongation at break), excellent Excellent cold resistance and chemical corrosion resistance, the price of raw materials is relatively high. For recyclable materials. Use temperature range -60～80℃. It is suitable for areas with strong vibrations such as earthquake-prone areas, near railways or factories with high-power cranes, and areas with strong ultraviolet radiation.
6. Thermoplastic vulcanizate (TPV) sealing strip
With the flexibility and elasticity of rubber, it can be produced by plastic processing methods without vulcanization, and waste materials can be recycled and reused. It is a material with a wide range of properties, good heat resistance and cold resistance, low relative density, oil resistance and solvent resistance are similar to neoprene rubber, and its resistance to compression set and wear is not so good. Use temperature range -40～150℃. It is suitable for cold and medium and high-rise buildings.
7. Plasticized polyvinyl chloride (PPVC) sealing strip
The material is cheap and easy to obtain, with corrosion resistance, wear resistance, acid and alkali resistance and various chemical media, combustion resistance, high mechanical strength; the disadvantage is that the plasticizer in the coordination system is easy to migrate, and becomes hard and brittle with time, losing Elasticity, not aging resistance, poor weather resistance and low temperature performance. Generally dark products. It is suitable for occasions where the light is not strong, the temperature changes little, and the weather conditions are not bad.
8. Surface coating material
It is to coat polyurethane, silicone, 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 silicone surface coating, the surface friction coefficient is small, which is beneficial to the sliding of doors and windows. Suitable for doors and windows with sliding doors, sashes. It is a substitute for traditional siliconized tops.