Last Updated on 29 September 2021 by Vincent Billot
Case study – Predicting optimal processing conditions for elastomer extrusion process
Industry : Aerospace
Client size : Group
Department : R&D
Our client is facing issues with the processing of elastomer by extrusion. Numerous internal pilot trial and laboratory studies couldn’t lead to define appropriate processing conditions.
The client asked RHEONIS to investigate with its original mix of polymer behaviour study/1D extrusion modeling the optimal processing conditions.
R&D approach for extrusion critical parameters
In this study, a combined approach of advanced polymer rheometry and simplified process modeling is performed for one elastomer with given formulation. Appropriate thermomechanical conditions are extracted thanks to phenomenological analysis of extrusion process.
Main steps of this 2-weeks study :
- Advanced rheometry of elastomer behaviour under various thermomechanical constraints and quantization of extrusion-characteristic parameters
- Simplified 1D thermomechanical modeling of extrusion process with experimental data as inputs
- Data interpretation and conclusions on appropriate temperatures along extrusion system
- Client internal test and confirmation of success
Systemic action chart
Predicting extrusion processing conditions thanks to “light” scientific approaches
Extrusion modeling is commonly considered as a heavy treatment that requires detailed screw geometrical data and numerous matter characterization data.
We developed simpler approach based on extrusion phenomenology and the identification of physical critical parameters (among them being interfacial dynamical properties responsible for screw-matter interaction).
Following the success of our recommandations, Client confided that issues with elastomer industrialisation had been lasting for more than one year and that classical R&D extrusion pilot studies had not been able to provide satisfaction.
Main advantages of our R&D approach for extrusion
Low consumption of matter
No need for industrial equipments (except for final validation…)
Recommendations are based on physical behaviour of the product, not on a theoretical modeling
This approach is also adapted for the optimization of product formulation