Classification of Automotive Seals

8A5845521B

1. Vulcanized rubber sealing strip

Generally 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 it expands greatly in ordinary mineral oil and lubricating oil, and is generally a dark-colored product. The operating temperature range is -60～+150℃. With its wide range of applications 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 appropriate breathability; it has unparalleled insulation properties; it can meet the hygiene 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. The operating temperature range is -100~+300℃. It can be used in 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 worse, but the overall performance balance is good. It has excellent weather resistance, ozone resistance, heat aging resistance, oil resistance and solvent resistance, good chemical resistance, excellent flame resistance, and good adhesion. The storage stability is poor, hardening will occur during storage, and the cold resistance is not good. The relative density is large. Generally black products. Used in environments that require oil resistance, heat resistance, acid and alkali resistance. The operating temperature range is -30~+120℃.

4. Nitrile rubber sealing strip

The main feature is that it is resistant to oil and solvents, but not resistant to media such as ketones, esters and chlorinated hydrocarbons. It has good elasticity and mechanical properties. The disadvantage is that it is prone to aging and cracking 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 hardness range (Shore A hardness 65-80 degrees), superior mechanical properties (tensile strength, elongation at break), excellent The cold resistance and chemical corrosion resistance are intertwined, and the price of raw materials is relatively high. For recyclable materials. The operating temperature range is -60~+80℃. It is suitable for areas with strong vibrations such as earthquake-prone areas, near railways or factories with high-power cranes, as well as areas with strong ultraviolet radiation.

6. Thermoplastic vulcanizate (TPV) sealing strip

It has the flexibility and elasticity of rubber and can be produced using plastic processing methods without vulcanization. The waste materials can be recycled and reused. It is a material with a wide performance range, good heat resistance and cold resistance, low relative density, oil resistance and solvent resistance similar to chloroprene rubber, but not very good in resistance to compression permanent deformation and abrasion. The operating temperature range is -40~+150℃. Suitable for cold and medium- and high-rise buildings.

7. Plasticized polyvinyl chloride (PPVC) sealing strip

The material is cheap and easy to obtain, has corrosion resistance, wear resistance, acid and alkali resistance and various chemical media, is resistant to combustion, and has high mechanical strength; the disadvantage is that the plasticizer in the matching system is easy to migrate, becomes hard and brittle over time, and loses Elastic, 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 does not change greatly, and the climate conditions are not harsh.

8. Surface coating materials

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 and window sashes. It is a substitute for traditional siliconized tops.