ISO 1133-2 and ASTM D1238: when Load Cell ensures Repeatability of Results
ISO

ISO 1133-2 and ASTM D1238: when Load Cell ensures Repeatability of Results

ISO 1133 and ASTM D1238 cover the determination of the Melt Mass-Flow Rate (MFR) and Melt Volume-Flow Rate (MVR) using easy and quick test procedures. The ASTM D1238/ISO 1133 standards specify detailed test conditions, including pre-heating period, starting position, and measurement length/time. However, fulfilling all standard specifications using a basic melt flow tester (extrusion plastometer) can be challenging, especially when testing some polymers and compounds. Results can be affected by poor repeatability.

Applicable Standards
  • ISO 1133-2

    Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics Part 2: Method for materials sensitive to time-temperature history and/or moisture

  • ASTM D1238

    Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer

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