Functional textile structures
View Patent ↗The invention provides a functional laminate composite fabric which is robust, laundry-durable and adaptable for securing about any three dimensional body, and a method for forming such fabric. The functional laminate fabric is provided with at least one functional element which can conduct electricity, conduct light, provide electromagnetic fields or provide shielding from electromagnetic fields. The functional laminate may include vias through which the functional element may be exposed. Generally, the functional laminate fabric is sufficiently robust for incorporation into garments and for applications in so-called wearable electronics.
1. A method for preparing a functional laminate with a substantially flat appearance, comprising:
providing a length of a first piece of fabric having a first surface and a second surface;
perforating the first piece of fabric to form one or more predetermined via openings therethrough, each said via opening having a length and a width;
extending and fixing at least one length of a functional element coextensively with the first piece of fabric, wherein said functional element is selected from the group consisting of: insulated single and multi-stranded metallic wires, noninsulated single and multi-stranded metallic wires, metallic coated polymeric fibers, inherently conductive polymer fibers, optical fibers, plastic optical fibers, silica glass optical fibers, electrically conductive composite yarns, and metallic coated films;
securing the extended length of the functional element to the first surface of said first piece of fabric along a substantial portion of the fixed length thereof;
providing a length of a piece of having a first surface and second surface; and
securing said piece of either to the functional element or to the first surface of said first piece of fabric along a substantial portion of the length thereof coextending with said functional element to form the functional laminate,
wherein the width of said at least one via opening is at least as large or is larger than a diameter or width of the functional element, wherein the functional element does not penetrate into or through either of the first piece of fabric or the piece of inextensible material, and wherein at least a portion of the functional element is exposed to an environment external to the functional laminate through the at least one via.
2. The method of claim 1 , wherein at least two lengths of functional elements are extended and fixed to be substantially parallel or coextensive.
3. The method of claim 1 , wherein the fabric is selected from the group consisting of nonwoven fabric, woven fabric and knit fabric.
4. The method of claim 1 , wherein the at least one via opening is selected from the group consisting of a hole, a slit or a slot.
5. The method of claim 4 , further comprising perforating the piece of inextensible material to form at least one other via opening.
6. The method of claim 1 , further comprising the steps of: (i) folding a distal end of the functional laminate back onto itself at least one time; and (ii) fastening such folded end to an outer surface of one outer layer.
7. The method of claim 6 , wherein fastening is by a mechanical fastening mechanism selected from the group consisting of gluing, riveting, snapping, stitching, stapling, welding, and encasing.
8. The method of claim 1 , further comprising the step of attaching at least one connector to the functional laminate, wherein said connector is adaptable for connecting the at least one functional element in the laminate to a source selected from the group consisting of electricity and radiation.
9. The method of claim 8 , further comprising connecting a source of electricity to the at least one functional element.
10. The method of claim 8 , further comprising connecting a source of radiation to the at least one functional element.
11. The method of claim 1 , wherein the inextensible material is a fabric or film selected from the group consisting of: nonwoven fabric, woven fabric, knit fabric, paper and polymer film.
12. The method of claim 1 , wherein the inextensible material is a fabric.