Part of Guide info.:
# Y' b K- f4 r4 t# b* tThermal Endurance9 z9 N+ E z3 ]9 @( P# @& a: y0 n
The materials covered by this program have been investigated with respect to thermal endurance of certain critical properties. The investigation was performed as part of a long-term thermal-aging program or based on historical record in accordance with ANSI/UL 746B, "Polymeric Materials - Long Term Property Evaluations." The temperature below which a class of critical property will not be unacceptably compromised through chemical thermal degradation, over the reasonable life of an electrical product (relative to a reference material having a confirmed, acceptable corresponding performance) is defined as the Relative Thermal Index (RTI). More than one RTI may be appropriate for a given material depending on the property requirements for a given application. In certain cases, higher temperatures are permitted if so specified by the end-use-product standard.( M' ^0 P7 o8 N" Q# z. a) R U8 M4 j
/ E/ I- o* G% |# SRTI Elec — Electrical RTI, associated with critical insulating properties.
/ K8 D# p4 C; A# b' _( lRTI Mech Imp — Mechanical Impact RTI, associated with critical impact resistance, toughness, elongation and flexibility properties.# }: r7 t' F Y$ {5 D4 p* J) r+ _
RTI Mech Str — Mechanical Strength (Mechanical without Impact) RTI, associated with critical mechanical strength and structural integrity where impact resistance, resilience and flexibility may not be essential. |