Long-term (6000-20000 hours) working temperature test of materials by UL Company.
Generally speaking, the long-term use temperature of plastics depends on the RTI value (relative temperature index) in UL yellow card.
RTI，
electron
RTI, machinery
have impact on
RTI，Mech，
No influence
Electrical methods of electrical characteristics;
IMP-impact means when there is an impact load;
Str stands for static
Mechanical-mechanical-under mechanical conditions;
W/ impact-under impact conditions;
without
Imp- no impact-no impact condition