--- type: "WebPage" title: "Polymer analysis laboratory by MFI (Melt Flow Index) technique" description: "You wish to carry out the analysis of the hot melt flow index (MFI) of your polymers Characterize the flow properties of your polymers to control their performance Problems and failures in your polymer parts can occur at any point..." resource: "https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/polymer-analysis-laboratory-by-mfi-melt-flow-index-technique/" tags: ["EN", "pll_627e57b1795dc", "Thomas ROUSSEAU"] timestamp: "2025-12-31T08:53:07Z" published: "2022-06-15T14:08:17Z" language: "en" author: "bwa" --- # Polymer analysis laboratory by MFI (Melt Flow Index) technique ## You wish to carry out the analysis of the hot melt flow index (MFI) of your polymers ### Characterize the flow properties of your polymers to control their performance Problems and [failures](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/laboratory-analysis-paint-varnish.md) in your [polymer](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory.md) parts can occur at any point in your production process. Their consequences are significant, as they can lead to a complete shutdown of production and even the recall of batches already put on sale. ### Why measure the melt flow index of your polymers? The melt flow index (MFI) is a key parameter for assessing the [viscosity](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/viscosity-index-measurement-on-polymer.md) and processability of thermoplastic polymers. Whether during the [development of new materials](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/laboratory-material-testing/development-new-materials-in-laboratory/), [quality control](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/control-the-quality-of-your-polymers-in-the-laboratory.md) of an incoming batch, or in the context of a processing problem, this data allows us to compare the fluidity of a molten material and anticipate its behavior during extrusion, injection, or molding. A variation in the MFI can reveal: - a [difference in molar mass](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/study-of-the-molar-mass-of-polymers-in-the-laboratory.md) or molar mass distribution, - [polymer degradation](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/laboratory-for-the-analysis-of-thermal-degradation-of-polymeric-materials.md) during the process, - or a change in formulation between two batches. ## The FILAB laboratory carries out the analysis of the hot melt flow index (Melt Flow Index - MFI) ### Our MFI analysis services at the FILAB laboratory At FILAB, our team supports manufacturers in the **comprehensive characterization of their polymer** materials using **Melt Flow Index (ISO 1133 / ASTM D1238)** measurements. Our services are tailored to your needs: - **MFI analysis**: precise quantitative measurement of the melt flow index under standardized conditions. - **Expertise**: interpretation of results in relation to chemical structure, molecular weight (GPC), or thermal degradation (ATG, DSC, FTIR, etc.). - **R&D support**: material monitoring, formulation optimization, supplier comparison studies, or investigation of process non-conformities. ### Our technical resources dedicated to MFI measurement Our state-of-the-art analytical fleet of **MFI plastometers** allows: measurement under different loads and temperatures, correlation with other techniques ([SEC](https://filab.fr/en/our-technical-resources/laboratory-analysis-gpc-sec.md), [DSC](https://filab.fr/en/our-technical-resources/laboratory-analysis-dsc-calorimetric.md), [FTIR](https://filab.fr/en/our-technical-resources/laboratory-analysis-ftir-spectroscopy.md), [SEM](https://filab.fr/en/our-technical-resources/laboratory-analysis-sem-scanning-electron-microscopy.md), etc.). the characterization of high [viscosity](https://filab.fr/en/our-services/our-analysis-services/chemical-analysis-laboratory/determination-of-the-viscosity-index-in-the-laboratory.md) or complex formulation [polymers](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/laboratory-material-testing/laboratory-polymer-characterization/), ### Additional analysis for a global vision To refine these initial results, **other mechanical and thermal analysis** can be used to complement the approach: - [bending tests](https://filab.fr/en/our-services/our-expertise-services/mechanical-laboratory-test/laboratory-bending-tests.md), [tensile test](https://filab.fr/en/our-services/our-expertise-services/mechanical-laboratory-test/tensile-test-materials-laboratory.md) or [compression tests](https://filab.fr/en/our-services/our-expertise-services/mechanical-laboratory-test/compression-and-mechanical-laboratory-tests.md), - [polymer elasticity measurements](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/plastics-processing-polymers/laboratory-measurement-of-elasticity-on-polymers.md), - combination with structural or composition analyses (FTIR, GPC, TGA, DSC, SEM, etc.). These cross-investigations **ensure that no avenues are overlooked** and p**rovide a complete understanding of the material's behavior**. ## Principle of MFI measurement Using MFI, a **polymer that has undergone deformation, rupture, or [failure](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/laboratory-analysis-polymer-defect.md)** can be **compared to a reference sample**. Specifically, the MFI test **involves melting the polymer part** under study to extract its constituent **molecular chains**. These chains are then passed **through a retention tube using a loaded piston for a given time**. Depending on their size and length, **they will be retained for a varying length of time**. This technique provides a**precise indication of the fluidity of different types of samples during their transformation** and makes it possible to **compare the reaction of a failed part with that of a reference part**. Thus, MFI is an e**ssential first step in formulating hypotheses regarding the origin of polymer failure**. ## FAQ What is MFI (Melt Flow Index) analysis? **MFI (Melt Flow Index) analysis**is a **method**used to analyze the flow properties of thermoplastics. It measures the Melt Flow Index, which is a measure of the viscosity of a melted polymer. The Melt Flow Index value is obtained by measuring the amount of melted plastic that passes through an orifice at a given time and under controlled conditions. This **MFI** **method**is non-destructive and reproducible, and can be used for quality control. **MFI analysis**is an important tool for quality control and research. It is widely used in a wide range of industries, including automotive, construction, medical device manufacturing, food packaging and many others. Is MFI method relevant for analyzing plastics? **MFI method** is highly relevant to plastics analysis. It provides information on the molecular weight distribution and rheological properties of polymers, enabling rapid comparisons between different batches or types of plastic, including their flow behavior at high temperatures.  This method is also interesting before introducing plastic on the market : materials are tested on several chemical and physical parameters. Applying the **MFI method**is essential to ensure that the material can be used for the intended application. Then companies are able to assess the quality of plastics before they are used in manufacturing. **Melt Flow Index analysis** also enables rapid comparisons between different types of plastic or batches from the same manufacturer. The **MFI test is a widely used method**in the plastic industry, and to get accurate viscosity information about your products or raw materials.   What are the industrial applications of MFI? MFI analyses are used in many sectors: - Plastics and polymer processing - Aeronautics and automotive (raw material validation) - Medical devices and cosmetics (material stability and compliance) - Packaging and electronics (quality monitoring and supplier control) Why use FILAB for your MFI analysis? - ISO 17025-accredited laboratory for several characterization techniques - A team of experts in analytical chemistry and polymer materials science - A unique integrated approach: Analysis + Expertise + R&D, all located on a single site - Short lead times and personalized support for your industrial projects