A WOVEN TEXTILE FABRIC

• US 20180171514A1
• Filed: 10/10/2016
• Published: 06/21/2018
• Est. Priority Date: 10/12/2015
• Status: Active Grant

• Current Assignee: Sanko Tekstil Isletmeleri San VE TIC As
• Original Assignee: Sanko Tekstil Isletmeleri San VE TIC As
• Inventors: COBANOGLU, Ozgur, IYIDOGAN, Deniz, ERYILMAZ, Jitka, AGIRMAN, Ali Kemal, AKDEMIR, Ozgur
• Granted Patent: US 11,008,679 B2
• Time in Patent Office: Days
• CPC Class Codes: D03D 1/0088 Fabrics having an electronic function
• CPC Class Codes: D03D 11/00 Double or multi-ply fabrics not otherwise provided for
• CPC Class Codes: D03D 15/00 Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
• CPC Class Codes: D03D 15/217 natural from plants, e.g. cotton
• CPC Class Codes: D03D 15/25 Metal
• CPC Class Codes: D03D 15/47 multicomponent, e.g. blended yarns or threads multicomponent fibres or filaments D03D15/292
• CPC Class Codes: D03D 7/00 Woven fabrics designed to be resilient, i.e. to recover from compressive stress
• CPC Class Codes: D10B 2101/12 Carbon; Pitch
• CPC Class Codes: D10B 2101/122 Nanocarbons
• CPC Class Codes: D10B 2101/20 Metallic fibres
• CPC Class Codes: D10B 2201/02 Cotton
• CPC Class Codes: D10B 2401/06 Load-responsive characteristics
• CPC Class Codes: D10B 2401/062 stiff, shape retention
• CPC Class Codes: D10B 2401/16 antistatic; conductive
• CPC Class Codes: D10B 2401/18 including electronic components
• CPC Class Codes: D10B 2403/021 Lofty fabric with equidistantly spaced front and back plies, e.g. spacer fabrics
• CPC Class Codes: G01K 7/003 using pyroelectric elements radiation pyrometers G01J5/00
• CPC Class Codes: G01L 5/00 Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
• CPC Class Codes: G01L 9/08 by making use of piezoelectric devices , i.e. electric circuits therefor
• CPC Class Codes: H02N 2/18 producing electrical output from mechanical input, e.g. generators for measurement devices G01
• CPC Class Codes: H10N 30/302 : Sensors
• CPC Class Codes: H10N 30/852 : Composite materials, e.g. having 1-3 or 2-2 type connectivity

Abstract

It is disclosed a woven textile fabric comprising a first and a second electrically conductive layer (20; 30) of interwoven conductive yarns (22, 24; 32, 34) and a first intermediate pseudo-layer (40) of structural and insulating yarns (45) comprised between the first and the second electrically conductive layer and a plurality of binding yarns (47) interlacing the first and second conductive layers (20; 30) and the intermediate layer (40). The structural yarns (45) and the binding yarns (47) have piezoelectric properties.

Claims

1. A woven textile fabric (10) comprising:

a first electrically conductive layer (20) of interwoven conductive yarns (22,24);

a second electrically conductive layer (30) of interwoven conductive yarns (32,34);

a first intermediate layer (40) of structural yarns (45) disposed between the first and the second electrically conductive layer (20, 30), and

a first plurality of binding yarns (47) interlacing the first and second conductive layers (20,30) and the intermediate layer (40), wherein said structural yarns (45) and said binding yarns (47) have piezoelectric properties.

2. The woven textile fabric (10) according to claim 1, wherein said structural yarns (45) and said binding yarns (47) are polarized under heat exceeding their glass-transition temperature (Tg) and under an electric field to provide piezoelectric properties to the yarns (45,47).

3. The woven textile fabric (10) according to claim 1, wherein the binding yarns (47) cross upper portions of the first electrically conductive layer (20) and bottom portions of the second electrically conductive layer (20) or viceversa.

4. The woven textile fabric (10) according to claim 1, wherein the first intermediate layer (40) of structural yarns (45) is an electrically insulating layer.

5. The woven textile fabric (10) according to claim 1, wherein the conductive yarns (22,24) are made of natural or synthetic material coated with a conductive material.

6. The woven textile fabric (10) according to claim 5, wherein the conductive material coating the conductive yarns (22,24) comprises nano-sheets of graphene, nano-particles of carbon black, amorphous carbon, nano-tubes or nano-ribbons of carbon, or a layer of an intrinsically conductive polymer.

7. The woven textile fabric (10) according to claim 1, wherein the conductive yarns (22,24) are made of a blend of cotton and steel or cotton and steel twisted and nano-sheet or nano-particle or nano-rod coated or impregnated or doped on cotton or on polyester (PES).

8. The woven textile fabric (10) according to claim 1, further comprising:

a second intermediate layer (50) of structural yarns (55);

a third electrically conductive layer (60) of interwoven conductive yarns (62,64);

the second intermediate layer (50) being comprised between the second and the third electrically conductive layer (30, 50), and

a second plurality of binding yarns (67) interlacing the second and the third electrically conductive layer (30) and the second intermediate layer (50), wherein the structural yarns (55) of the second intermediate layer (50) and said binding yarns (67) of the second plurality of binding yarns (67) have piezoelectric properties.

9. The woven textile fabric (10) according to claim 8, wherein the first and second electrically conductive layers (20, 30) have substantially the same electrical conductivity, and the third electrically conductive layer (60) has an electrical conductivity substantially lower than the electrical conductivity of the first and second electrically conductive layers (20, 30) and the intermediate layers (40, 50) have the same piezoelectric properties.

10. The woven textile fabric (10) according to claim 8, wherein the second intermediate layer (50) of structural yarns (55) is an electrically insulating layer.

11. The woven textile fabric (10) according to claim 1, wherein the structural yarns (45,55) and the binding yarns (47,67) comprise a material chosen from the group consisting of Polyvinylidene fluoride (PVDF) and its piezoelectric derivatives, Polytetrafluoroethylene (PTFE), Lead zirconate titanate (PZT), barium titanate, gallium phosphate, tourmaline, lead magnesium niobate-lead titanate (PMN-PT), and zinc oxide.

12. The woven textile fabric (10) according to claim 11, wherein the materials used for the structural yarns (45,55) and the binding yarns (47,67) are cast into fibers or are used as nano- or micro-particles dispersed within a matrix material.

13. A textile fabric position sensor comprising the woven textile fabric of claim 1 and an operational amplifier (130) configured to generate an electrical signal (Va) in response to a tap pressure on the textile fabric.

14. A textile fabric position sensor comprising the woven textile fabric of claim 8 and operational amplifiers (130, 130′

) configured to generate electrical signals (Vb, Vc), wherein the ratio between said electrical signals is proportional to the distance of a tap position with respect to the operational amplifiers (130,130′

).

15. A tap-sensitive screen (300) comprising:

a plurality of textile fabric position sensors including the woven textile fabric of claim 9, the textile fabric position sensors being configured in the form of textile strips, the strips being ordered in a parallel fashion along a direction perpendicular to the longitudinal direction of the strips, each of the strips being identified with an index (1-n) stored in a memory unit (450) of the tap-sensitive screen (300).

16. An article comprising a textile fabric (10) according to claim 1.

17. The article according to claim 16, wherein said article is selected from the group consisting of an energy harvester to power low-power electronic nodes, a hit sensor for emergency situations, a heat sensor, and a garment.

18. The article according to claim 17, wherein said article is said garment, said garment is a sport garment and said textile fabric is a touch sensor or tap sensor or hit sensor.