Technical summary
Criteria for relating online MFR/MVR measurements with laboratory tests such as ASTM D1238 and ISO 1133.
Typical applications
- Resin control where MFR defines lot acceptance.
- Processes with frequent material or recycled-content changes.
- Lines that need to reduce waiting time for laboratory testing.
Key points
Correlation, not direct replacement
Online measurement must be correlated with the laboratory method used by the plant.
Useful trend
Even if the absolute value needs adjustment, the trend quickly detects changes.
Less delay
Helps take action before waiting for a spot-sample result.
Recommended inquiry data
- Current laboratory method.
- Test conditions: temperature, load and procedure.
- Common materials and MFR ranges.
- Current sampling frequency and required response time.
Related document
Related document: Open original PDF document.
Selection criteria
Correlation requires historical data or comparative tests between laboratory and production line.
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