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

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2013-04-04DOD Approved: 1988-11-03
Price Code:BANSI Approved: 2016-12-21
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover long-term test procedures to be used for the evaluation of materials used for parts intended for specific applications in end products.

    1.2 Together with the Standards mentioned in Supplementary Test Procedures, Section 3 , these investigations provide data with respect to the physical, electrical, flammability, thermal, and other properties of the materials under consideration and are intended to provide guidance for the material manufacturer, the molder, the end-product manufacturer, safety engineers, and other interested parties.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 References
          • 3 Supplementary Test Procedures
          • 4 Characteristics of Polymeric Materials
          • 5 Use of Polymeric Materials
        • DETERMINATION OF THE RELATIVE THERMAL INDICES OF POLYMERIC MATERIALS
          • 6 General
          • 7 Relative Thermal Index – Based Upon Historical Record
          • 8 Relative Thermal Index – Based Upon Long-Term Thermal-Aging Programs
          • 9 Apparatus
            • 9.1 Ovens
          • 10 Scope of Test Programs
            • 10.1 Selection of test properties
          • 11 Property-Evaluation Tests
            • 11.1 General
            • 11.2 Choice of end-point
          • 12 Sampling Programs
          • 13 Selection of Oven Temperatures
          • 14 Selection of Control Material
          • 15 Specimens
          • 16 Thermal Aging
          • 17 End-of-Life
            • 17.1 Primary properties
            • 17.2 Secondary properties
          • 18 Proof Testing
          • 19 Analysis and Evaluation
          • 20 Related Material – Coverage of Variations in Material Composition
            • 20.1 General
            • 20.2 Thermoplastic materials
            • 20.3 Thermosetting molded materials
          • 21 Aging, Specimen, and Check-Test Schedules
            • 21.1 General
            • 21.2 Polypropylene
            • 21.3 Coating powders
          • 22 Fixed Time Sampling Method
            • 22.1 General
            • 22.2 Screening Procedure
            • 22.3 Remainder of Fixed Time Sampling Method
        • RELATIVE THERMAL INDEX CLASS
          • 23 Assignment of Temperature Classifications
        • MARKING
          • 24 General
    • FOLLOW-UP INSPECTION INSTRUCTIONS