Talking about how the sealing strip of auto parts was introduced into China?

At present, EPDM or polyvinyl chloride plastic (PVC) is generally used as the main material of the sealing strip of auto parts. EPDM is an elastomer material polymerized from ethylene and propylene monomers with a small amount of non-conjugated diene. Unsaturated double bonds are introduced into the upper surface, so it has excellent weather resistance, heat resistance, ozone resistance, ultraviolet resistance, good fabrication performance and low compression set. It is the first choice for the production of automotive sealing strips. The service life of automobile sealing strip produced with EPDM material can reach more than ten years.

PVC materials are mostly used in automotive weather strips with higher surface decoration requirements, such as roof trim strips, inner and outer sealing strips of windows. With the development of the automobile industry, more and more new materials can be used for the fabrication and production of automobile weather strips. Among them, thermoplastic elastomer (TPE) material is the most prominent new type of environmental protection material, which is mainly divided into polyolefin (TPV, TPO); polyurethane (TPU); polyester (TPEE): polyvinyl chloride (TPVC) ); polyamides (TPAE) and other types of thermoplastic elastomers. Polyolefin (TPV, TPO) thermoplastic elastomer materials are mainly used in automotive weather strip products. These materials have a small friction coefficient with glass and good wear resistance, and can be used as automotive glass guide grooves and door glass. Materials for strips and some auxiliary sealing strips. In addition, more and more attention is paid to environmental protection requirements in the auxiliary materials of various automotive weather strips, such as the application of various environmentally friendly adhesives and water-based coating materials.

In the 1980s, auto parts seals were introduced to China. It brings great convenience to people’s life. The production process of the sealing strip has been greatly developed. In the long-term accumulation, the sealing strip has been applied to various industries such as automobiles, doors and windows, and household appliances, and its composition and production process are also different according to the different requirements of various industries. Are not the same. The development of various industries has driven the sealing to various degrees and also provided essential materials for the development of various related industries.

The development history of the sealing strip is closely related to the development of the door and window industry. As early as the 1990s, the widespread popularity of aluminum alloy doors and windows in my country brought the era of sealed natural rubber strips. This type of rubber strip not only has low manufacturing costs, but also has a low starting threshold for manufacturing. With the prolongation of use time, various fractures, hardening and other conditions occur. Subsequently, the country announced a ban on steel doors and windows, and natural rubber seals also faded out of the market. Since then, the country has begun to promote the use of PVC sealing strips. In the initial use process, PVC sealing strips did play a high market value, but then there was a situation of poor sealing, and due to the production method of small workshops. Low-price competition has made more and more inferior products flow into the market, and the vicious development has blocked the continued development of PVC sealing strips.

With the use of EPDM strips, PVC sealing strips officially disappeared from people’s sight. The surface of the new EPDM sealing strip is smooth and beautiful, with good elasticity and compression deformation resistance, weather resistance, ozone resistance, chemical resistance and a wide operating temperature range (-60 ~ 125 ℃) and other excellent properties. EPDM sealing strips are more widely used in automobiles, doors and windows, cabinets, refrigerators, containers, etc.