To shorten the wait for the 14th ThGOT and the 6th Optics Colloquium we would like to give you a small foretaste of our numerous exciting technical presentations in the coming weeks.
UV laser irradiation for dry textile pretreatment
Dirk Wenzel, Saxon Textile Research Institute e. V., Chemnitz
The content of the presentation is to realize the improvement of the adhesion strength of functional layers on (woven) textiles using a dry pretreatment by means of UV laser. The boundary condition here is that the textile properties, such as elasticity, haptics and optics, are not negatively affected by the treatment. To achieve this goal, the technologies of optical processing by means of laser radiation and 3D material application were combined. By means of laser pretreatment, it was possible to remove disturbing, process-related coatings of the textile (sizing and avivages) and to prepare the surface of the textile for the inclusion of functional layers.
This talk will be presented at 11:20 a.m. on March 13, 2019, in SESSION B: NEW TRENDS IN SURFACE TECHNOLOGY.
Development of high-resistance yarns based on thermally activatable coatings
Antje Krahmer, Textile Research Institute Thuringia - Vogtland e. V., Greiz
The presentation deals with the development of conductive yarn materials with the aim of achieving a homogeneous electrical resistance in the high-ohm range over the entire yarn length. In particular, the application in textile substrates for freely cutable heating contours requires a constant resistance behavior in the range of 1 1,000 kOhm/m. Thermal, chemical and mechanical resistance, long-term stability in use and general textile-technological processability are further requirements. The basis is a thermally activatable polymer coating with conductive additives.
The advantage is that the change on the yarn surface to achieve the high-resistance properties is independent of the fiber material of the base yarn, since the conductivity is achieved by conductive particles as well as thermal modification of the polymer layer. Accordingly, a high-resistance yarn can be produced with any yarn material by the thermally activatable polymer coatings with conductive additives. Various polymer coatings with different conductive additives were tested. The polymer coatings are applied to the filament using plating and blocking methods. With added graphite and silver particles as well as intrinsically conductive polymers, thread resistances in the high ohmic range are achieved.
This talk will be presented at 11:40 a.m. on March 13, 2019, in SESSION B: NEW TRENDS IN SURFACE TECHNOLOGY.