Rubber PTFE ,Teflon expansion joint
PTFE, PE, rubber characteristics introduction
PTFEis one of the best corrosion resistance materials.
PE:is a kind of thermoplastic by polymerization of vinyl resin. Has
good low temperature resistance (the lowest temperature can reach
70 ~ 100°C), chemical stability is good, most of acid and alkali erosion
(acid) with characteristics of oxidation resistance, temperature
does not dissolve in solvents, small water imbibition, excellent
electrical insulation properties; But polyethylene for
environmental stress (chemical and mechanical effect) is very
sensitive, heat aging resistance is poor.
Rubberand PTFE have many of the same characteristics, different
characteristics of rubber is different , such as, NBR rubber oil
resistant performance is good, butyl rubber( IIR) tightness is
good, EPDM rubber heat resistance, ozone resistance is superior,
the silicone rubber heat-resistant hardy superior performance, FKM
rubber high temperature resistant performance is very good. Common
characteristic are good rubber elasticity, good sealed performance,
and defect is easy ageing.