Advertise Here [468 W x 60 H pixels]
Report | March 2015

World's first piezoelectric fabrics for wearable devices!

The fabrics comprise a piezoelectric poly-L-lactic acid (PLLA) and carbon fibre electrode.
Cu Kansai University and Teijin announced that Professor Yoshiro Tajitsu, Faculty of Engineering Science, Kansai University, and Teijin have developed the world´s first polylactic acid (PLA) fibre-and carbon-fibre-based piezoelectric fabrics.

The new piezoelectric fabrics combine Teijin´s polymer and textile technologies´a Teijin growth strategy to integrate key existing materials and businesses´with Prof Tajitsu´s world-leading knowledge of piezoelectric materials. Development was supervised by Prof Tajitsu at Kansai University, with technological cooperation provided by the Industrial Technology Center of Fukui Prefecture.

The fabrics comprise a piezoelectric poly-L-lactic acid (PLLA) and carbon fibre electrode. Plain, twill and satin weave versions were produced for different applications: plain weave detects bending, satin weave detects twisting, and twill weave detects shear and three-dimensional motion, as well as bending and twisting.

The sensing function, which can detect arbitrary displacement or directional changes, incorporates Teijin?s weaving and knitting technologies. The function allows fabric to be applied to the actuator or sensor to detect complicated movements,even three-dimensional movements. Kansai University and Teijin will introduce the new piezoelectric fabric(booth No. 18-11, East Hall) at The 1st Wearable Expo, the world?s largest wearable devices and products exhibition, which will be held at the Tokyo International Exhibition Hall (Tokyo Big Sight) in Japan from January 14-16.

Kansai University and Teijin will continue working on ideal weaves and knits for fabric applications that enable elaborate human actions to be monitored simply via clothing worn by people. Such applications are expected to contribute to the evolution of the Internet of Things (IoT) in fields ranging from elderly care to surgery, artisanal techniques to space exploration, and many others.

Piezoelectricity is the ability of certain dielectric materials to generate an electric charge in response to mechanical stress. It also has the opposite effect ? the application of electric voltage produces mechanical strain in the materials. Both of these effects can be measured, making piezoelectric materials effective for both sensors and actuators. Lead zirconate titanate (PZT) has practical piezoelectric applications in industry, but as a ceramic material it lacks transparency and flexibility. In addition, because PZT contains lead, applications are being increasingly limited by the EU directive that restricts the use of certain hazardous substances in electrical and electronic equipment.

Polyvinylidene fluoride (PVDF) is a well-known piezoelectric polymer. However, it is limited to use in sensors and such, and it is not suited to industrial-level manufacturing because it requires poling treatment and exhibits pyroelectricity. Poling treatment, which involves applying high DC voltage to a material, is a required process for achieving piezoelectricity. Pyroelectricity is the ability of certain materials to generate a voltage and charge following a change in temperature. The existence of pyroelectricity is a very important factor in human-machine interface (HMI) applications because if a piezoelectric sensor material has pyroelectricity, then it can immediately detect heat from a finger.

In 2012, Kansai University and Teijin developed a flexible, transparent piezoelectric film by alternately laminating PLLA and optical isomer poly-D-lactic acid (PDLA).The all-new wearable piezoelectric fabric announced today is the newest application of this technology.

For further information:
Teijin Limited,
Tel: +81 3 3506 4055,
Email: pr@teijin.co.jp

Post your comment
Name:  
Email:    
Comments:  
Verification Code:   Change Image


 
Advertise Here [728 W x 90 H pixels]
AB Carter India Pvt Ltd      Angel Mechtronik      Arvind Rub-Web Controls Ltd      Associated Autotex Ancillaries Pvt Ltd      ATE Enterprises Pvt Ltd      B & R Industrial Automation Pvt Ltd      Basant Mechanical Works      Batliboi Ltd      Best Power Equipments India Pvt Ltd      Bharat Beams Pvt Ltd      Bhatt Bros      Condair      Elgi Electric and Industries Ltd      Embee Corporation      Eppinger Tooling Asia Pvt Ltd      Excel Traders      Gandhi Automations Pvt Ltd      Ion Exchange India Ltd      ITEMA WEAVING (INDIA) PVT LTD      Jogindra Industries Pvt Ltd      K.U. Sodalamuthu and Co. Pvt Ltd      Konica Electronics Enterprise      Kusters Calico Machinery Pvt Ltd      Labelmach      Lakshmi Machine works Ltd      Leuze Electronic Pvt Ltd      Loepfe Brothers Ltd (Masterline)      M-Tex Enterprises      Mayur Reeds And Healds Pvt Ltd      Nestling Technologies      Peass Industrial Engineers Pvt Ltd      Phoenix Textile Engineering Pvt Ltd      Prashant West Point Machinery Pvt. Ltd      Premier Evolvics Pvt Ltd      RENMAKCH India Pvt. Ltd      Rieter India Pvt Ltd (Suessen)      Rieter India Pvt. Ltd      Rossari Biotech Ltd      Savio Texcone Pvt Ltd      SB Dye Springs India Pvt Ltd      Schoch Reeds India      South Gujarat Chamber of Commerce & Industry      SRE Corporation      SSM Scharer Schweiter Mettler Ag (Rieter)      Stovec Industries Ltd      Sunrise Industries      Swiss Ribbons Pvt Ltd      Thies GmbH and Co.      Thymas Electronics Pvt Ltd      Truetzschler India Pvt Ltd      Uster Technologies AG      Vetal Hitech Machines Pvt. Ltd      Weavetech Engineering Pvt Ltd      AB Carter India Pvt Ltd      Angel Mechtronik      Arvind Rub-Web Controls Ltd      Associated Autotex Ancillaries Pvt Ltd      ATE Enterprises Pvt Ltd      B & R Industrial Automation Pvt Ltd      Basant Mechanical Works      Batliboi Ltd      Best Power Equipments India Pvt Ltd      Bharat Beams Pvt Ltd      Bhatt Bros      Condair      Elgi Electric and Industries Ltd      Embee Corporation      Eppinger Tooling Asia Pvt Ltd      Excel Traders      Gandhi Automations Pvt Ltd      Ion Exchange India Ltd      ITEMA WEAVING (INDIA) PVT LTD      Jogindra Industries Pvt Ltd      K.U. Sodalamuthu and Co. Pvt Ltd      Konica Electronics Enterprise      Kusters Calico Machinery Pvt Ltd      Labelmach      Lakshmi Machine works Ltd      Leuze Electronic Pvt Ltd      Loepfe Brothers Ltd (Masterline)      M-Tex Enterprises      Mayur Reeds And Healds Pvt Ltd      Nestling Technologies      Peass Industrial Engineers Pvt Ltd      Phoenix Textile Engineering Pvt Ltd      Prashant West Point Machinery Pvt. Ltd      Premier Evolvics Pvt Ltd      RENMAKCH India Pvt. Ltd      Rieter India Pvt Ltd (Suessen)      Rieter India Pvt. Ltd      Rossari Biotech Ltd      Savio Texcone Pvt Ltd      SB Dye Springs India Pvt Ltd      Schoch Reeds India      South Gujarat Chamber of Commerce & Industry      SRE Corporation      SSM Scharer Schweiter Mettler Ag (Rieter)      Stovec Industries Ltd      Sunrise Industries      Swiss Ribbons Pvt Ltd      Thies GmbH and Co.      Thymas Electronics Pvt Ltd      Truetzschler India Pvt Ltd      Uster Technologies AG      Vetal Hitech Machines Pvt. Ltd      Weavetech Engineering Pvt Ltd