--- type: "WebPage" title: "Laboratory Capillary Rheometer testing" description: "You would like to perform a capillary rheometer testing Characterize your polymers under real-world processing conditions In an industrial context where process control (extrusion, injection) is fundamental, FILAB offers its high-pressure capillary rheometer for your rheological analysis. Thanks to this..." resource: "https://filab.fr/en/our-technical-resources/capillary-rheometer-testing/" tags: ["EN", "pll_69a6e016c9efd", "Thomas ROUSSEAU"] timestamp: "2026-03-10T09:13:02Z" published: "2026-03-03T13:50:10Z" language: "en" author: "Laure Durieux" --- # Laboratory Capillary Rheometer testing ## You would like to perform a capillary rheometer testing ### Characterize your polymers under real-world processing conditions In an industrial context where process control (extrusion, injection) is fundamental, **FILAB** offers its high-pressure **capillary rheometer for your [rheological analysis](https://filab.fr/en/our-services/our-expertise-services/rheological-analysis-laboratory-polymer-rheology.md)**. Thanks to this cutting-edge equipment and our [polymer materials](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory.md) experts, we help you understand the rheological behavior of your materials, from ambient temperature up to **400°C**. ### Our analytical capabilities and measured parameters for a capillary rheometer testing #### Complete rheological behavior: - [Viscosity measurement](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/viscosity-index-measurement-on-polymer.md) **under shear stress**. - Determination of **viscosity before degradation** to optimize your process windows. - **Stress relaxation** analysis and **yield stress** identification. #### Control of appearance and flow defects: - **Characterization of Die Swell** at the outlet of the flow channel. - Analysis of **wall slip and detection of flow instabilities** (orange peel effect, melt rupture). #### Thermodynamic data: Plotting of isothermal **PVT (Pressure-Volume-Temperature) curves** essential for your numerical molding simulations. ## The FILAB laboratory supports you in your capillary rheometer testing ### A high-performance machine park for capillary rheometer testing Equipped with **interchangeable dies**, our Malvern rheometer allows you to simulate various geometries and adapt to the specific requirements of your samples: - **Temperature range**: from ambient to **400°C**. - **Applications**: thermoplastics, elastomers, filled and recycled polymers. - **Purposes**: formulation assistance, batch comparison (benchmarking), or troubleshooting production issues. ### Our rheological analysis [Measurement of the viscosity index on polymer](https://filab.fr/en/our-services/our-analysis-services/polymer-materials-analysis-laboratory/viscosity-index-measurement-on-polymer.md) [Viscoelasticity measurement](https://filab.fr/en/our-services/our-expertise-services/rheological-analysis-laboratory-polymer-rheology/laboratory-measurement-of-viscoelasticity.md) [Rheological analysis of polymers](https://filab.fr/en/our-services/our-expertise-services/rheological-analysis-laboratory-polymer-rheology/polymer-rheology-analysis-laboratory.md) [Rheological analysis of powders](https://filab.fr/en/our-services/our-expertise-services/rheological-analysis-laboratory-polymer-rheology/rheological-analysis-of-powders-in-the-laboratory.md) [Rheological analysis](https://filab.fr/en/our-services/our-expertise-services/rheological-analysis-laboratory-polymer-rheology.md) ## Our FAQ Why use a capillary rheometer rather than a rotary rheometer? The capillary rheometer is essential for simulating industrial processes with high shear rates (extrusion, injection). Where the rotary rheometer is limited to low flow rates, the capillary allows the study of materials under real-world transformation conditions. What is the Pressure-Volume-Temperature (PVT) measure and why is it important? Pressure-Volume-Temperature (PVT) curves describe the evolution of a polymer's density. This data is fundamental for design offices: it allows them to predict material shrinkage during cooling and to optimize compaction in the mold to avoid sink marks. How are flow instabilities detected? By increasing the pressure and examining the rods exiting the die, the rheometer identifies the critical point where the flow becomes unstable. This helps prevent defects such as melt fracture or the "orange peel" appearance on your finished products. How important is it to measure "Die Swell"? Upon exiting a die, a polymer tends to return to its original shape (elastic memory). Measuring this swelling is essential for correctly sizing your tooling (extrusion dies) to obtain a final part with precise dimensions. Can we study the recycling of materials with this test? Absolutely. Capillary rheometry is an excellent tool for comparing virgin and recycled materials. It allows you to see if the viscosity before degradation has been affected by successive processing cycles, thus ensuring the stability of your production. What is the typical duration of the analysis? Turnaround times vary depending on the nature of the analysis and the complexity of the expert assessment project. However, FILAB is committed to providing fast turnaround times tailored to your industrial constraints and urgent needs. How to get a quote from FILAB? To obtain a quote, you can contact our team via our contact form, by phone, or by email. Simply tell us your requirements (type of material, desired analysis, applicable standards, urgency, quantity of samples, etc.). We will then send you a personalized technical and pricing proposal within 24-48 hours.