Types and characteristics of sealing strips:

1. Vulcanized rubber sealing strip

Generally, it is made of EPDM material. It has 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 the amount of expansion in general mineral oil and lubricating oil is large, and it is generally a dark product. Operating temperature range -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 insulating properties; it can meet the hygienic level of food hygiene requirements 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. Operating temperature range -100～300℃. It can be used in areas with high temperature, cold, strong ultraviolet radiation and middle and high-rise buildings.

3. Neoprene sealant strip (CR)

Compared with other special rubbers, the individual properties are poor, but the overall properties are well balanced. It has excellent weather resistance, ozone resistance, heat aging resistance, oil and solvent resistance, good chemical resistance and excellent flame resistance, and good adhesion. Poor storage stability, hardening will occur during storage, and cold resistance is not good. relatively dense. Generally black products. Used in environments with oil resistance, heat resistance, acid and alkali resistance requirements. Operating temperature range -30 ~ 120 ℃.

4. Nitrile rubber sealing strip

The main feature is oil resistance, solvent resistance, but not ketone, ester and chlorinated hydrocarbons and other media, elastic 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.

5. Thermoplastic elastomer sealing strip

It has good elasticity and excellent wear resistance, good oil resistance, wide adjustable range of hardness (Shore A hardness of 65 to 80 degrees), superior mechanical properties (tensile strength, elongation at break), excellent The cold resistance and chemical resistance are interwoven with corrosion resistance, and the price of raw materials is higher. for recyclable materials. Operating temperature range -60 ~ 80 ℃. It is suitable for earthquake-prone areas, near railways or workshops with high-power cranes and other areas with strong vibrations, as well as 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 the waste 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 similar to neoprene, but not very good in compression set resistance and wear resistance. Operating temperature range -40 ~ 150 ℃. It can be applied to cold, as well as 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 matching system is easy to migrate, and becomes hard and brittle with time. Elasticity, not resistant to aging, 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 climatic conditions are not harsh.

8. Surface coating material

It is to coat the surface of the sealing strip with polyurethane, silicone, polytetrafluoroethylene and other substances to replace the surface flocking of the traditional process. The coated sealing strip has good wear resistance and smoothness, especially the sealing strip after coating the silicone surface coating, the surface friction coefficient is small, which is conducive to the sliding of doors and windows. Suitable for doors and windows with sliding doors and sashes. It is an alternative to traditional siliconized tops.

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