Dokadra - Modelling the interaction between fibres and card clothing in the production of nonwovens (2010 - 2012)

Carding machines with several working groups are extensively used in producing dry-laid nonwovens for a variety of technical applications (e.g. filters, insulating material, automotive, hygiene, geotextiles, construction, etc.). The geometry of the card clothing the rollers are equipped with, is one of the most critical components of carding machines. Nevertheless, the choice of the most appropriate clothing is still based on experience and not on scientific models.
The first aim of the project is to obtain fundamental insights in the interaction fibre-card, more specifically existing models describing the influence of fibre properties (length, crimp, friction, etc.) and machine properties (geometry of the card clothing, type of metal coating, speeds, etc.) on the nonwoven properties and quality.
Subsequently, a simulation model will be set up that describes the interaction between fibre and card clothing during carding, transfer, condensing and randomizing actions. The model should allow determining the forces acting on the fibres during carding, the nature of the transfer between rollers and the influence of the card clothing and the fibre orientation distribution. The user interface should allow easy modification of the settings on the carding machines (e.g. diameters and speeds of rollers and the clearances between rollers) as well as card clothing geometry.
The final aim is develop a test set up to validate the results of the simulation model (e.g. orientation of fibres, fibre behaviour, opening of fibre tufts) for a given card clothing geometry.

Supported by: IWT
Duration: 03/2010 - 02/2012
Contact: Prof. Dr. ir. Lieva Van Langenhove