RTI is the abbreviation of Relative Thermal Index, which infers the maximum temperature that a material can withstand in 1, hours through the accelerated aging test results of 6, to 2, hours, which is what we usually call the long-term service temperature of plastics. The long-term service temperature of materials can be judged from the RTI value in UL yellow card.

the second part of p>UL94 test is to determine the relative temperature index (RTI) of the material. RTI is a specific temperature at which the original value of a material's characteristics is reduced to half after it is placed for 6,-2, hours. If it is not tested, the material adopts ordinary RTI. The higher the RTI value, the higher the material grade.

Extended materials

Notes for p>UL certification:

1. The minimum height of a registered trademark should be 3/64 inch.

2. When the diameter of the outer circle of the UL mark is less than 3/8 inch, the registered trademark symbol can be ignored if it is not clearly readable under naked eyes.

3. The mark can be directly fixed on the unchangeable product by stamping, molding, ink printing, screen printing or similar methods.

4. Acquisition of logo: The manufacturer can reprint it or obtain it from UL authorized dealers.

Reference: Baidu Encyclopedia-Relative Temperature Index