Curing method of EPDM sealing strip
Release time:
2021-03-19
EPDM sealing strip is a rubber made by copolymerization of ethylene and propylene solution, and then introduced into the third single (ENB). EPDM rubber sealing strip is basically a saturated polymer with excellent aging resistance, weather resistance, electrical insulation, chemical resistance and impact elasticity. The main disadvantage of EPDM sealing strip is the slow curing speed. It is difficult to use with other unsaturated rubbers, and the self-adhesion and mutual adhesion properties are poor, so the processing performance is not good.
EPDM sealing stripIt is a rubber made by the solution copolymerization of ethylene and propylene, and then introduced into the third mono (ENB). EPDM rubber sealing strip is basically a saturated polymer with excellent aging resistance, weather resistance, electrical insulation, chemical resistance and impact elasticity. The main disadvantage of EPDM sealing strip is the slow curing speed. It is difficult to use with other unsaturated rubbers, and the self-adhesion and mutual adhesion properties are poor, so the processing performance is not good.
EPDM sealing strips are mainly used in several fields that require aging resistance, water resistance, corrosion resistance, and electrical insulation, such as light-colored tire sidewalls, heat-resistant conveyor belts, cables, wires, anti-corrosion linings, sealing gaskets, construction Waterproof sheets, door and window sealing strips, home appliance accessories, plastic modification, etc.
EPDM sealing strip curing method:
(1) Discontinuous vulcanization method of EPDM sealing strip (after extrusion, cut the length of the tape, put it in an autoclave, and extrude the sulfur-containing compound of the rubber semi-finished model);
(2) EPDM sealing strip continuous vulcanization (microwave continuous vulcanization, salt bath continuous vulcanization, continuous hot air vulcanization and other methods).
A. Microwave continuous vulcanization of composite sealing strips: The microwave continuous vulcanization production process includes metal cores, rubber mixing, extruded foamed plastic materials and energy, which improves efficiency, and continuous vulcanization equipment is superior to other equipment. Microwave heating is a feature of the heated object, which is a bit like conventional external input, not only heating and distribution, but also by improving product quality, the heat generated shortens the time required for heating.
B. continuous curing sealing salt bath: bath salt bath containing sulfide system, large pollution to the environment, gradually eliminated.
C.EPDM sealing stripHot air vulcanization sealing: Hot air vulcanization has developed into high temperature and strong wind, which can achieve high-speed, hot air vulcanization (Vmax:60 m/s,tmax: 450 c). Using the pretreatment effect, the safety is greatly improved.
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