Waterproof rubber sealing strips can be classified according to several methods such as section shape, vulcanization method, use of parts and applications, and materials used.

According to the vulcanization method

(1) Discontinuous vulcanization method (extruded rubber strips are cut to a certain length and then vulcanized in a vulcanizing tank, and semi-finished extruded rubber strips are vulcanized in a model).

(2) continuous vulcanization method (microwave continuous vulcanization method, salt bath continuous vulcanization method, hot air continuous vulcanization method and other methods).

A. Microwave continuous vulcanization of composite seals: Microwave vulcanization technology is a production technology that was applied and widely promoted after the energy crisis in the 1970s abroad. The use of microwave continuous vulcanization technology can not only produce a variety of materials from metal core, solid core rubber and sponge rubber composite rubber strips.

It is superior to other continuous curing devices in terms of energy saving and efficiency improvement. This technology is recognized worldwide as the best process method for producing extruded products. The characteristic of microwave heating is that the heat is generated directly in the heated object instead of being input from the outside as conventional, which not only generates heat quickly but also distributes it evenly, which is conducive to improving product quality and greatly reducing the time used for heating.

B. Salt bath continuous vulcanization seal: salt bath vulcanization using a salt bath system containing nitrite, environmental pollution, has been gradually eliminated.

Vulcanization can also achieve the role of flame pretreatment, and safety greatly improved.

According to the rubber seal material classification

The rubber material of automobile sealing strip has three kinds of dense rubber, sponge rubber and hard rubber.

Hard rubber hardness up to Shore A95. sealing strip rubber more use aging resistance, low temperature, water resistance, chemical resistance, especially ozone aging EPDM rubber (EPDM). EPDM can be with steel belt, steel wire woven belt, TPE, fleece, flocking, PU coating, silicone coating, etc. compound, to ensure that the car interior and outside and their own waterproof, dustproof, sound insulation, heat insulation, vibration damping, anti-wear and decorative role. vibration damping, anti-abrasion and decorative role.

In general EPDM seal can be used stably for more than ten years. You can also choose neoprene (CR) which has good ozone resistance and good aging resistance.

Considering the common rubber process performance, sometimes also need to choose and rubber, such as natural rubber (NR) and CR and styrene-butadiene rubber (SBR) three kinds of rubber and or polyethylene (PE), EPDM and NR rubber and plastic type to improve ozone resistance.

According to the use of parts

Automotive seals, door and window seals, ship seals, mechanical seals, etc.; mechanical seals include cabinet seals, container seals, etc.