Functional Yarn Coating

Innovative made-to-order yarns

The functional finishing agents and coatings of filament and staple fiber yarns for innovative products are in the focus of interest. New process technologies are developed, tested, and made ready for production - together with industrial partners. As for the area of staple fiber yarns, facilities with production speeds of up to 400 m/min and 1.000 m/min for filament yarns are available. The application technologies comprise systems for dipping, stripping, and quetching including minimal coating processes using different methods. The film separation technology with plasma is also applied. On-line pre-washing methods and plasma treatment under conditions of atmospheric pressure are also offered as pretreatment. Air-driers of different constructions as well as IR-radiators for the drying processes are used.

Processes which enable high temperatures at corresponding retention times required for the linkage and condensation of finishing agents are currently being developed.

Low, medium, and very viscous liquor systems are suitable for the applications - liquor systems which can be applied as aqueous recipes or hot-melts. Corresponding process technologies for the control of rheological forces within the application device are available. Developments in residual moisture sensoring for filament yarns are well advanced as well as developments in the on-line method of coating measurements. The finishing processes are carried out from bobbin to bobbin and from bobbin to warp beam – both in the area of staple and filament yarns. A wide range of chemical auxiliaries can be used for functionalization. Within the scope of corresponding research projects a multitude of suitable fibers, yarns, and finshing combinations are under development.
Good results were achieved in these areas: nano-structures, super-hydrohobic properties, oil-repellence, flame resistance, cyclodextrins, anti-bacterial effects, friction reduction, etc. Complementary functions, such as photocatalytic degradation, permanent electrical conductivity, and IR-reflexion are currently being developed.

Besides its application, yarns are also tested for their desired properties, such as UV-radiation resistance, climatic change resistance, dedusting, abrasion, buckling change as well as in terms of further processability to textile fabrics. Lab-scale production is offered for special products.


Contact:
Dr.-Ing. Thomas Stegmaier
Phone: +49 (0)7 11 / 93 40 - 219
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Dipl.-Ing. Werner Wunderlich
Phone: +49 (0)7 11 / 93 40 - 296
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