Melt index (melt - mass flow rate) MFR (MFI)

(Test conditions according to Annex B Table B1, e.g. PE: 190°C/2.16 kg; PP: 230°C/2.16 kg). We also carry out tests with other loads on request.

In short — AI-generated

The melt index test determines the flowability of thermoplastic materials in a molten state. A defined weight presses the plastic granulate through a standardized nozzle at a specific temperature, and the mass of the material flowing out within ten minutes is measured.

The resulting value indicates the viscosity of the polymer and serves as a key indicator for processability during extrusion or injection molding. Packaging developers use this data to ensure consistent material quality and to verify that the plastic is suitable for the intended manufacturing process.

Text is AI-generated; based on test method data curated and verified by Innoform.

Test Method Group: Material analysis

Norms:

DIN EN ISO 1133-1 (2022-10) Plastics – Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics – Part 1: Standard method

Required Sample Amount: 100 g

Standard Tests

MFR (MFI) standardtest PE und copolymers like E/VA,E/A;E/AA,E/BA

Specific Norm: DIN EN ISO 1133

Test under standard conditions according to code D (190/2, 16) which is used in manufacturer's data sheets for most PE- Homo and copolymer resins.

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MFR (MFI) standardtest PP- homo und copolymers

Specific Norm: DIN EN ISO 1133

Test under standard conditions according to code M (230/2,16) which is used in manufacturer's data sheets for most PP- homo and copolymer resins.

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MFR (MFI) Standardtest PLA- Biopolymere

Specific Norm: DIN EN ISO 1133

Test under standard conditions which is used in manufacturer's data sheets for most PLA- grades. Not yet included in standard conditions.

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