Publication

Humidity and Temperature Sensors on Plastic Foil for Textile Integration

Nico de Rooij, Jérôme Courbat
2011
Conference Papers

Abstract

Low-power humidity and temperature sensors fabricated on Kapton (R) polyimide sheets are successfully woven into textile using a conventional weaving machine. During machine weaving electronic devices undergo mechanical deformation, mostly due to bending, and shear forces. Bending radii in textiles can be as small as 165 mu m during weaving, corresponding to a strain of about 15 %. This imposes stringent mechanical requirements on the textile integrated sensors. In this work, we present gas sensors on plastic foil with encapsulated active area for protection during stripes dicing, weaving, and operation. Basic tests with CAB and PDMS sensing layers on capacitive transducers showed that woven sensors survive the weaving process without loss of functionality. (C) 2011 Published by Elsevier Ltd.

Official source

https://infoscience.epfl.ch/entities/publication/00aa0598-bf46-471e-aa43-7b2948628590

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Nico de Rooij, Jérôme Courbat
2011
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/00aa0598-bf46-471e-aa43-7b2948628590

About this result

Related concepts (26)

Weaving

Weaving is a method of textile production in which two distinct sets of yarns or threads are interlaced at right angles to form a fabric or cloth. Other methods are knitting, crocheting, felting, and braiding or plaiting. The longitudinal threads are called the warp and the lateral threads are the weft, woof, or filling. The method in which these threads are interwoven affects the characteristics of the cloth. Cloth is usually woven on a loom, a device that holds the warp threads in place while filling threads are woven through them.

Textile

Textile is an umbrella term that includes various fiber-based materials, including fibers, yarns, filaments, threads, different fabric types, etc. At first, the word "textiles" only referred to woven fabrics. However, weaving is not the only manufacturing method, and many other methods were later developed to form textile structures based on their intended use. Knitting and non-woven are other popular types of fabric manufacturing.

Humidity

Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity depends on the temperature and pressure of the system of interest. The same amount of water vapor results in higher relative humidity in cool air than warm air. A related parameter is the dew point. The amount of water vapor needed to achieve saturation increases as the temperature increases.

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Humidity and Temperature Sensors on Plastic Foil for Textile Integration

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