ISO 1133

testing

International standard specifying test methods for determining the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastic materials under specified temperature and load conditions.

In Simple Terms

ISO 1133 is the international version of testing how easily molten plastic flows through a standardized opening. It measures both the weight (MFR) and volume (MVR) of plastic that flows in 10 minutes under specific heat and pressure conditions.

Why It Matters

This standard ensures consistent global testing methods for plastic flow properties, enabling accurate material comparison, quality control, and processing parameter optimization across different suppliers and manufacturing locations worldwide.

Technical Details

ISO 1133 defines procedures using a plastometer with standard dies, test temperatures, and loads specific to each polymer type. The method measures both MFR (g/10 min) and MVR (cm³/10 min), allowing calculation of melt density. Test conditions vary by material - PP typically uses 230°C/2.16 kg while PE uses 190°C/2.16 kg.

Real-World Examples

International PP resin procurement

A buyer uses ISO 1133 MFR values to compare polypropylene grades from European and Asian suppliers, ensuring consistent processing characteristics across different sources

Global quality assurance program

A multinational manufacturer implements ISO 1133 testing at all facilities to maintain uniform incoming material specifications regardless of local supplier or testing lab

Export certification requirements

A resin producer provides ISO 1133 test data on certificates of analysis to meet international customer specifications and regulatory requirements