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Influence of Dry Cleaning on the Electrical Resistance of Screen Printed Conductors on Textiles

Kazani I., De Mey G., Klepacko R., Hertleer C., Guxho G., Van Langenhove L., Napieralski A.

Autex Research Journal

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2016

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Vol. 16, no. 3

146--153

EN

Electrically conducting inks were screen printed on various textile substrates. The samples were dry cleaned with the usual chemicals in order to investigate the influence of the mechanical treatment on the electrical conductivity. It was found that dry cleaning has a tremendous influence on this electrical conductivity. For several samples, it is observed that the electrical resistance increases with the square of the number of dry cleaning cycles. In order to explain this observation a theoretical model and a numerical simulation have been carried out, by assuming that dry cleaning cycles introduce a crack in the conducting layer. The theoretical analysis and the numerical analysis both confirmed the experimental observations.

2

Performance Study of Screen-Printed Textile Antennas after Repeated Washing

Kazani I., Declercq F., Scarpello M.L., Hertleer C., Rogier H., Vande Ginste D., De Mey G., Guxho G., Van Langenhove L.

Autex Research Journal

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2014

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Vol. 14, no. 2

47--54

EN

The stability of wearable textile antennas after 20 reference washing cycles was evaluated by measuring the reflection coefficient of different antenna prototypes. The prototypes’ conductive parts were screen-printed on several textile substrates using two different silver-based conductive inks. The necessity of coating the antennas with a thermoplastic polyurethane (TPU) coating was investigated by comparing coated with uncoated antennas. It is shown that covering the antennas with the TPU layer not only protects the screen-printed conductive area but also prevents delamination of the multilayered textile fabric substrates, making the antennas washable for up to 20 cycles. Furthermore, it is proven that coating is not necessary for maintaining antenna operation and this up to 20 washing cycles. However, connector detachment caused by friction during the washing process was the main problem of antenna performance degradation. Hence, other flexible, durable methods should be developed for establishing a stable electrical connection.

3

Electrical Conductive Textiles Obtained by Screen Printing

Kazani I., Hertleer C., De Mey G., Schwarz A., Guxho G., Van Langenhove L.

Fibres & Textiles in Eastern Europe

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2012

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Vol. 20, no. 1 (90)

57-63

EN

The aim of this work was to develop a textile fabric with electrical conductivity. This fabric was made from cotton yarns coated with a solution based on carbon black. This paper reports the results of preparing different recipes using a number of quantities of carbon black particles and other components of the coating mixture, which were tested in order to obtain the best results regarding electrical conductivity. The optimal concentration of conductive particles of carbon black was studied.

PL

W artykule opisano zastosowanie nowej metody uzyskiwania tkanin przewodzących poprzez stosowanie druku sitowego i atramentów przewodzących. Jest to metoda atrakcyjna ze względu na różnorodne zastosowanie i atrakcyjność cenową. Badano oporność powierzchniową tkanin w rożnych stadiach procesu: po druku, po testach ścierania i po praniu. Badane tkaniny wykazywały dobrą przewodność elektryczną po druku i testach ścierania, natomiast po 20 cyklach prania przewodność znacznie się zmniejszyła. Dlatego też tkaniny pokrywano warstwą poliuretanu, dzięki czemu uzyskano dobrą przewodność elektryczną również po wielokrotnych praniach.