UL 746B Polymeric Materials - Requirements for Long-Term Property Evaluations

Material Testing

UL 746B Polymeric Materials - Requirements for Long-Term Property Evaluations

EUROLAB laboratory provides testing and compliance service within the scope of UL 746B standard. These requirements cover long-term test procedures to be used to evaluate materials used for parts for specific applications in end products.

UL 746B Polymeric Materials - Requirements for Long-Term Property Evaluations

The Test Procedures, together with the specified standards, provide data on the physical, electrical, flammability, thermal and other properties of the materials under investigation and are intended to provide guidance for the material manufacturer, moulder, end product manufacturer, safety engineers and other interested parties.

Long Term tests refer to the expected time for the test to be performed. This usually means that test specimens will undergo some thermal aging before being tested.

General requirements for UL 746B tests are for four or more high-temperature initiation of thermal aging. The most common minimum period for thermal aging to take place is 5000 hours. This does not mean that all long-term thermal aging projects can be completed within a minimum requirement of 5000 hours; The time required for completion should be agreed upon by all parties involved.

Long-term thermal aging, abbreviated as LTTA, is also known as thermal aging, thermal weathering, thermal index rating or TI or Relative Thermal Index Rating or RTI.

There are three common features used for TI and RTI projects:

  • Mechanical Properties
  • Electrical Properties (Dielectric Strength)
  • Flammability Properties

EUROLAB, together with its state-of-the-art accredited laboratories and expert team, helps you get precise and fast results under UL 746B.

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