WO2006042375A1 - Tissu et méthode de fabrication dudit tissu - Google Patents

Tissu et méthode de fabrication dudit tissu Download PDF

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Publication number
WO2006042375A1
WO2006042375A1 PCT/AU2005/001638 AU2005001638W WO2006042375A1 WO 2006042375 A1 WO2006042375 A1 WO 2006042375A1 AU 2005001638 W AU2005001638 W AU 2005001638W WO 2006042375 A1 WO2006042375 A1 WO 2006042375A1
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WO
WIPO (PCT)
Prior art keywords
fabric
hydrophobic
yarn
yarns
fibres
Prior art date
Application number
PCT/AU2005/001638
Other languages
English (en)
Inventor
Barry Victor Holcombe
Ian Blanchonette
David John Evans
Laurence Michael Staynes
John Anthony Rippon
Ronald James Denning
Birgit Schaldecker
Petra Kiessling
Original Assignee
Gore Enterprise Holdings, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gore Enterprise Holdings, Inc. filed Critical Gore Enterprise Holdings, Inc.
Priority to EP05796987A priority Critical patent/EP1802803A4/fr
Priority to JP2007537073A priority patent/JP2008517178A/ja
Priority to US11/409,113 priority patent/US20070093162A1/en
Publication of WO2006042375A1 publication Critical patent/WO2006042375A1/fr

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
    • A41B17/00—Selection of special materials for underwear
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/12—Hygroscopic; Water retaining
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61F13/51305—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability having areas of different permeability
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
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    • D—TEXTILES; PAPER
    • D03—WEAVING
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    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/208—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based
    • D03D15/217—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based natural from plants, e.g. cotton
    • D—TEXTILES; PAPER
    • D03—WEAVING
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    • D03D15/527—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads waterproof or water-repellent
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
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    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D06M15/277—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof containing fluorine
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
    • A41B2400/00—Functions or special features of shirts, underwear, baby linen or handkerchiefs not provided for in other groups of this subclass
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    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/322—Warp differs from weft
    • Y10T442/3228—Materials differ
    • Y10T442/3236—Including inorganic strand material
    • Y10T442/3252—Including synthetic polymeric strand material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/45—Knit fabric is characterized by a particular or differential knit pattern other than open knit fabric or a fabric in which the strand denier is specified

Definitions

  • the present: invention relates to a new fabric and a method of making the fabric that is capable of transferring liquid from an inner face to an outer face of the fabric by wicking.
  • the fabric consists entirely of cotton fibres and is suitable for making sports garments or under garments that help keep a person dry and comfortable.
  • Cotton fibre in its raw state is coated by naturally occurring waxes that make it hydrophobic. Once this coating is removed, by scouring for example, the fibre surface is strongly hydrophilic - more so than any non-cellulosic fibre. This high surface energy brings positive benefits, but in some conditions, significant disadvantages.
  • Synthetic polymers typically have relatively low surface energy. In order to improve their wicking performance, they are often treated with hydrophilic finishes of one form or another to increase the fibre surface energy, although they do not reach the same level as cotton. Wet cling is much less of a problem.
  • multi-layer structures consisting of fibres of different surface energies and/or different fibre diameters are used to create a wicking gradient between the inner surface and the outer surface of the fabric so that sweat is preferentially transported away from the skin.
  • Moisture transport that occurs preferentially from one face of the fabric to the other is known as differential wicking and fabrics that achieve differential wicking by the use of layers of different fibre diameters are generally known as denier gradient fabrics.
  • US patent application 2002/0064639 describes several multi-layered fabrics comprising cellulosic fibres designed to reduce wet cling.
  • One particular type of fabric that is the focus of the US application comprises wicking windows that extend from the inner surface of the fabric to the outer surface of the fabric for transferring liquid from the inner surface to the outer surface.
  • the fabric is made by applying a hydrophobic agent in a discontinuous manner to the inner surface to form regions of low surface energy and thereby leaving untreated regions of relatively high surface energy that form wicking windows.
  • control of the coating process described in the US application is extremely difficult as during application the hydrophobic agent will tend to follow the same path into. the fabric as sweat would normally use, blocking off much of the wicking capability.
  • the present invention is based on the realization that improved wicking of liquid from an inner face to an outer face of a fabric can be achieved by a fabric structure where the inner face of the fabric has a substantially uniform hydrophobicity and where the inner face is formed by hydrophobic yarn that is assembled in a manner that allows the liquid to penetrate the inner face and make contact with hydrophilic yarn that forms at least part of the outer face of the fabric.
  • the liquid can be drawn through the inner face to the outer face of the fabric.
  • a fabric including: i) an inner face that is formed entirely from one or more than one hydrophobic yarn that has been treated to render it hydrophobic and said yarn or yarns are assembled over the inner face so that the inner face has a hydrophobicity that is substantially the same over the inner face; and ii) an outer face that in comparison to the inner face is hydrophilic and is formed at least in part by one or more than one hydrophilic yarn, wherein the hydrophobic yarn or yarns are assembled so that liquid can penetrate the inner face and make contact with the hydrophilic yarn or yarns that form at least part of the outer face of the fabric and that, in turn, can draw liquid to the outer face of the fabric. It is preferred that the hydrophobic yarn or yarns be assembled so that some sections of hydrophobic yarn in the inner face are separated by spaces through which the liquid can penetrate.
  • spaces or spacings between the hydrophobic yarns refers to the distance between the outer surfaces of the yarns.
  • the hydrophilic and hydrophobic yarns may include, but are not restricted to, any one or a blend of the following types of fibres: a) man-made or synthetic fibres including polyester, polyamide, polyurethane, polypropylene, polyacrylonitrile, polyvinylchloride and regenerated cellulose; and b) natural fibres including proteinaceous fibres such as wool and hair and cellulosic fibres such as cotton.
  • man-made fibres or filaments are included in the hydrophobic yarn that forms the inner face of the fabric, it is preferred that the man-made yarn be treated with a hydrophobic agent.
  • synthetic fibres may also be treated with a hydrophilic agent when incorporated in one of the hydrophilic yarns.
  • non-cellulosic man-made fibres lack the well recognized moisture buffering capacity of cotton and other cellulosic fibres. This has led us to conclude that an optimal fabric will preferably be one that is made of cotton fibres and modified cotton fibres that possesses some of the liquid wicking properties of some technical synthetic fabrics.
  • the phrase embraces variations in hydrophobicity that may, for example, arise due to operational characteristics and limitations of the methods and processes used to create the hydrophobic properties of the yarns forming the inner face of the fabric. It is possible that a hydrophobic agent may be applied to yarns forming the inner face of the fabric using any of the following known techniques: padding, foam application, lick rollers, dip-hydro, spraying, printing or doctor blade. It is also possible that the yarns may be treated when assembled as a fully formed fabric or as individual yarns prior to being assembled into a fabric.
  • An example of a technique for creating a fabric having an inner face formed from hydrophobic yarns and having substantially the same hydrophobicity over the inner face is to laminate two separate fabric layers, one being a hydrophobic layer and another being a hydrophilic layer that have been separately manufactured and treated prior to being laminated together to form a complete fabric having an inner face and an outer face.
  • the fabric layer intended to form the inner face of the laminated fabric assembly can be treated as a fully formed fabric with a hydrophobic agent before lamination using any one or more of the known processes and techniques described above.
  • the treated fabric layer may then be laminated with the other fabric layer that has not been treated with a hydrophobic agent using suitable adhesion techniques.
  • the preferred technique is for the pre- treated hydrophobic yarns to be woven or knitted together with one or more than one hydrophilic yarn. It is preferred that the hydrophobic yarns be pre-treated with a hydrophobic agent prior to formation of the fabric.
  • the fibres of the hydrophobic yarns may be treated with a hydrophobic agent while in the form of loose fibres, or at any other stage prior to the formation of a yarn such as a sliver or roving, it is preferred that the fibres be pre-treated with a hydrophobic agent when in the form of a yarn.
  • the outer face of the fabric be made predominantly from hydrophilic yarns. This can be at least in part achieved by utilising the naturally hydrophilic cellulose surface of the cotton fibres and/or other types of cellulosic fibres.
  • the fibres may need to be scoured to remove any hydrophobic contaminants such as, natural waxes in the case of cotton.
  • the yarns forming the outer layer are preferably not pre- treated with the hydrophobic agent that is used to treat the yarns forming the inner layer.
  • the term "predominantly” is used to describe on a proportional basis the quantity of a particular feature.
  • the outer face of the fabric includes at least 50 percent hydrophilic yarns on a weight basis. It is more preferred that the outer face of the fabric be formed from 80 percent hydrophilic yarn.
  • the outer face of the fabric be formed from 100 percent hydrophilic yarn. It is preferred that the hydrophobic yarns be pre-treated using an exhaust process.
  • the yarns may include man-made fibres including synthetic fibres and natural fibres such as wool, it is preferred that the fibres include cotton fibres and/or other types of cellulosic fibres.
  • the yarns contain at least 50 percent cotton and/or other types of cellulosic fibres.
  • Cellulosic fibres other than naturally occurring cotton fibres include, but are by no means limited to: mercerised cotton, jute, hemp, flax, ramie, linen or regenerated cellulosic fibres such as viscose, rayon and lyocell. It is more preferred that the yarns contain at least 80 percent cotton and/or other types of cellulosic fibres.
  • the yarns be made entirely of cotton and/or other types of cellulosic fibres.
  • the fabric when fully formed may also be made entirely of cotton and/or other types of cellulosic fibres.
  • One of the advantages provided by the fabric of the present invention when made entirely of cotton and/or other cellulosic fibres is that the fabric is not at risk of melting and burning skin, that is a characteristic of many commercially available fabrics that utilize fibre denier gradients or differences in fibre surface energy between layers to create differential wicking.
  • Differential wicking through the use of denier gradients is generally achieved with fabric structures made from thermoplastic synthetic fibres.
  • Other fabric structures that use combinations of layers of synthetic and natural fibres to achieve differential wicking generally have the synthetic layer on the inner face of the fabric that contacts the skin.
  • thermoplastic synthetic fibres against skin The danger with thermoplastic synthetic fibres against skin is that the fibres can absorb enough energy to melt during exposure to intense heat sources such as a fire during an emergency situation. The resulting molten synthetic material can then adhere to skin and when it re ⁇ solidifies, the latent heat of fusion released can cause severe burns.
  • the fabric of the present invention is formed from yarns that are entirely made of cotton and/or other types of cellulosic fibres, the fabric is well suited to clothing emergency service personnel and military personnel as well as others.
  • pre-treated hydrophobic yarns and hydrophilic yarns be intermeshed within the _ Q _
  • the ratio of hydrophilic to hydrophobic yarns on a mass basis ranges from 95:5 to 10:90 respectively.
  • the ratio of hydrophilic to hydrophobic yarns on a mass basis ranges from 60:40 to 80:20 respectively.
  • An advantage of managing the ratio of the hydrophobic to hydrophilic yarns is that the wicking behaviour and liquid storage capacity of the fabric can be optimized.
  • the hydrophobic yarn or yarns are assembled over the inner face of the fabric so as to form loops or floats on the inner face and thereby form said sections of hydrophobic yarn separated by spaces.
  • the loops or floats provide structures between which liquid can penetrate to pass through the hydrophobic inner face of the fabric.
  • sweat excreted by a person wearing the fabric may be subject to pressure by virtue of the fabric bearing against the skin of the person and by the flexing of the fabric as the person moves. Pressure on sweat droplets of this nature may also force or assist the liquid to penetrate between the hydrophobic yarn formations on the inner face.
  • the fabric In the situation where the fabric is worn as a second or third layer of clothing, the fabric is unlikely to have direct contact against the skin of the person. However, the same principles can still apply and liquid contacting the inner face of the fabric will be subject to pressure at least when the fabric is flexed and changes shape during movement.
  • the liquid may be completely wicked from the inner face of the fabric to the outer face without continuous external pressures and forces that may have assisted in the liquid penetrating between the hydrophobic yarns to initiate wicking.
  • wicking once wicking has commenced it can continue until all of the liquid in contact with the inner face is transferred to the outer face or the capacity of the hydrophilic yarns to store liquid is exhausted.
  • the spacing of the sections of hydrophobic yarn on the inner face of the fabric range from 0.01 to 25mm in the wale or warp direction and range from 0.01 to 25mm in the course or weft direction.
  • spacing refers to the distance between the outer surface of the yarns rather than the centre-to-centre distance.
  • the spacing of the sections of hydrophobic yarn on the inner face of the fabric is between 0.1 and 2.5mm in the wale or warp direction and between 0.1 and 2.5mm in the course or weft direction.
  • the hydrophobic and hydrophilic yarns are preferably intermeshed in a manner whereby the hydrophilic yarns from part of a core or central region of the fabric and the outer face of the fabric.
  • the hydrophilic yarn does not appear in the inside face of the fabric but is located below the surface at points where liquid penetrating the hydrophobic face can make contact with it. It is preferred that the hydrophilic yarn be located at a distance ranging from 0.01 to 2.0mm from an outer plane of the inner face of the fabric.
  • the hydrophilic yarn be located at a distance ranging from 0.1 to 1.0mm from an outer plane of the inner face of the fabric.
  • knitted fabric structures that may be employed in forming the fabric include both all-needle and half-gauge double knits, single jersey plated structures, and collapsed rib structures involving elastomeric yarns.
  • woven fabric structures that may be employed in forming the fabric include twills, sateens, satins and double cloths.
  • the fabric has a buffering capacity against liquid water K f , which, when measured in accordance with a Hohenstein Institute standard test, ranges from 0.1 to 1.
  • the fabric has a buffering capacity against liquid water K f , which, when measured in accordance with a Hohenstein Institute standard test, ranges from 0.9 to 1. It is also preferred that the fabric has a drop sorption index i B , which, when measured in accordance with a Hohenstein Institute standard test, ranges from 0 to 250.
  • the fabric has a drop sorption index i B , which, when measured in accordance with a Hohenstein Institute standard test, ranges from 0 to 5.
  • i B drop sorption index
  • a fabric including: i) an inner face that is formed entirely from one or more than one hydrophobic yarn and said yarns are assembled over the inner face so that the inner face has a hydrophobicity that is substantially the same over the inner surface and is suitable for making the inside of a garment, wherein said yarns include cotton and/or other types of cellulosic fibres and have been pre-treated with a hydrophobic agent prior to formation of the fabric, and ii) an outer face that in comparison to the inner face is relatively hydrophilic such that liquid can be wicked through the inner face to the outer face, and wherein the outer face is made of yarns that include cotton and/or other types of cellulosic fibres.
  • a fabric including: i) an inner face that is hydrophobic and has a hydrophobicity that is substantially the same over the inner face, and is suitable for making the inside of a garment; and ii) an outer face that in comparison to the inner face is hydrophilic whereby liquid contacting the inner face can be wicked through the fabric to the outer face without being retained by the inner face, and wherein the inner and outer faces of the fabric are made of yarns that include cotton fibres and/or other types of cellulosic fibres.
  • a fabric including: i) an inner face that is formed entirely from one or more than one hydrophobic yarn and said yarn or yarns are assembled over the inner face so that the inner face has a hydrophobicity that is substantially the same over the inner face, and wherein said yarns include cotton fibres and/or other types of cellulosic fibres; and ii) an outer face that in comparison to the inner face is hydrophilic whereby liquid contacting the inner face can be wicked through the fabric to the outer face and wherein the outer face is made of yarns that include cotton fibres and/or other types of cellulosic fibres.
  • hydrophobic yarns that are assembled over the inner face of the fabric be intermeshed with the hydrophilic yarns that form at least part of the outer face of the fabric and the hydrophobic yarns are arranged so that liquid is able to be drawn through the hydrophobic face by the hydrophilic yarns.
  • a method of making a fabric that is capable of wicking liquid through an inner face to an outer face of the fabric.
  • the method includes the steps of: a) providing a hydrophilic yarn; b) providing a hydrophobic yarn that has been treated to render it hydrophobic; and c) forming a fabric using said hydrophilic and hydrophobic yarns, wherein the yarns are assembled relative to each other such that the inner face of the fabric is made entirely from the hydrophobic yarn and the hydrophobic yarns are arranged in the inner face so that liquid can penetrate and make contact with hydrophilic yarn that forms at least part of the outer face of the fabric.
  • step b) include pre-treating fibres of the hydrophobic yarn with a hydrophobic agent which results in the hydrophobic agent being fixed to the fibres.
  • the hydrophilic yarn does not appear in the inner face of the fabric but is located below the surface and can draw liquid through the inner face to the outer face of the fabric.
  • the hydrophobic yarns are arranged so that some sections of the hydrophobic yarn are separated by spaces that liquid can penetrate.
  • the hydrophilic and hydrophobic yarns include but are not limited to any one or a blend of the following types of fibres: i) man-made or synthetic fibres including polyester, polyamide, poIyurethane, polypropylene, polyacrylonitrile, polyvinylchloride and regenerated cellulose; and ii) natural fibres including proteinaceous fibres such as wool and hair and cellulosic fibres such as cotton.
  • a method of making a fabric including one or more than one hydrophobic yarn and one or more than one hydrophilic yarn that includes cotton and/or other types of cellulosic fibres, the yarns being woven or knitted together such that an inner face of the fabric is formed entirely from the hydrophobic yarns so that the hydrophobicity of the inner face is substantially the same over the inner face and an outer face of the fabric that is, by comparison, hydrophilic such that liquid can be wicked through the fabric from the inner face to the outer face.
  • the method includes the step of pre-treating the cotton and/or other types of cellulosic fibres of the hydrophobic yarn that forms the inner face of the fabric with a liquor containing a hydrophobic agent prior to the yarn being used to make the fabric.
  • the yarns may include man-made fibres including synthetic fibres and natural fibres such as wool, it is preferred that the fibres include cotton fibres and/or other types of cellulosic fibres.
  • At least one of the yarns contain at least 50 percent cotton and/or other types of cellulosi ⁇ fibres.
  • Cellulosic fibres other than naturally occurring cotton fibres include, but are by no means limited to: mercerised cotton, jute, hemp, flax, ramie, linen or regenerated cellulosic fibres such as viscose, rayon and lyocell.
  • At least one of the yarns contain at least 80 percent cotton and/or other types of cellulosic fibres. It is even more preferred that said yarns be made entirely of cotton and/or other types of cellulosic fibres.
  • the step b) include pre- treating the fibres with a liquor containing a hydrophobic agent and results in the hydrophobic agent being fixed to the fibres.
  • a method of making a fabric that is capable of wicking liquid through an inner face to an outer face of the fabric and the fabric includes two or more than two yarns that include cotton fibres and/or other types of cellulosic fibres.
  • the method includes the steps of: a) pre-treating the scoured cotton fibres and/or other types of cellulosic fibres of at least one of the yarns with a liquor containing a hydrophobic agent so as to impart hydrophobic properties to the fibres; and b) forming a fabric from two or more yarns of which at least one yarn includes the cotton fibres and/or other types of cellulosic fibres pre-treated according to step a) and, wherein the yarns are assembled relative to each other such that the inner face of the fabric is made entirely from said yarn containing fibres pre-treated according to step a) and that the inner face of the fabric is hydrophobic compared to the outer face and has a hydrophobicity that is substantially the same over the inner face.
  • the step of pre-treating the cotton fibres and/or other cellulosic fibres with the liquor containing a hydrophobic agent results in the hydrophobic agent being fixed to the fibres.
  • step a) may be carried out either before, during or after the cotton fibres and/or other types of cellulosic fibres are spun into a yarn.
  • the cotton fibres and/or other types of cellulosic fibres pre-treated according to step a) may be provided in any form including loose fibres, sliver, rovings, spun yarns, hanks, and even woven, knitted or non-woven fabric.
  • the fibres pre-treated according.to step a) be in the form of a spun yarn.
  • the yarns including cotton fibres and/or other types of cellulosic fibres consist entirely of cotton fibres.
  • the yarns may include blends of cotton fibres with other cellulosic fibres and non-cellulosic fibres such as polyester.
  • cellulosic fibres other than naturally occurring cotton fibres include but are not limited to the following types of fibres: mercerised cotton, jute, hemp, flax, ramie, linen or regenerated cellulosic fibres such as viscose, rayon and lyocell.
  • the fabric can be unravelled to form a continuous yarn or thread that can be further processed with another yarn in accordance with step b) of the method of the present invention.
  • the method whereby a knitted fabric is pre-treated then unravelled into yarn and re-formed into fabric is known as the knit- de-knit process.
  • steps a) and b) may be carried out consecutively or disjunctively. It is possible that step a) may be carried out using various techniques that allow the liquor to contact the cotton fibres and/or other types of cellulosic fibres. For example, depending on the form in which the fibres are provided, the liquor containing the hydrophobic agent may contact the fibres by padding, rolling or spraying the liquor onto the fibres. However, it is preferred that step a) involves submerging the cotton fibres in the liquor so that the hydrophobic agent is preferentially adsorbed onto the cotton fibres from the liquor.
  • step a) involves contacting the fibres with the liquor using an exhaust process.
  • Exhaust processes are known at present as suitable for applying dyestuffs to yarns and involve placing one or more than one yarn package into an enclosed vessel that may be pressurized and pumping the dyestuff through the yarns. It has been found that a hydrophobic agent can be fixed to the fibres satisfactorily using an exhaust process.
  • step a) may be carried out at any suitable temperature, it is preferred that step a) be carried out at a temperature ranging from 10 to 110 0 C.
  • step a) be carried out at a temperature ranging from 20 to 70 0 C. It is preferred that step a) be carried out at a starting temperature of 10 0 C increasing at a rate ranging from 0.1 to 5.0 degrees per minute to a maximum of 110 0 C.
  • step a) be carried out at a starting temperature of 20 0 C increasing at a rate ranging from 0.5 to 1.5 degrees per minute to a maximum of 70 0 C.
  • hydrophobic agents examples include but are not limited to any one or a combination of silicones, fluorochemicals, oils, latexes and hydrocarbons. It is preferred that the hydrophobic agent included in the liquor be a fluoroacrylate polymer.
  • the fabric can be piece dyed using conventional dyestuffs such as reactive dyes without shade differences between treated and untreated yarns in the same fabric.
  • the dyeing treatment does not change the wicking mechanism of the fabric.
  • the useable life of the new fabric made by the method of the present invention is determined by the number of wash and wear cycles that can be endured before wicking of liquid no longer preferentially occurs from the inner face to the outer face. This in turn is a function of the resistance of the hydrophobic agent to physical damage and/or leaching during the washing process.
  • the hydrophobic agent be capable of forming covalent bonds to the surface of cotton and/or other types of cellulosic fibres treated according to step a) .
  • the rate of uptake of the hydrophobic agent from the liquor and the uniformity of the deposition of the hydrophobic agent throughout the yarn packages may be dependent on the availability of an electrolyte.
  • the ability to completely exhaust the hydrophobic agent from the liquor and to avoid undesired deposition of polymer onto the treatment vessel or flocculation of hydrophobic agent, the liquor may need to contain an electrolyte.
  • the treatment liquor also includes an electrolyte.
  • the electrolyte may be any suitable electrolyte such as sodium sulphate or magnesium chloride.
  • step a) involve controlling the concentration of electrolyte in the solution. Controlling the concentration may be required to achieve both uniform application of the hydrophobic agent and complete exhaustion of the hydrophobic agent from the liquor. It is preferred that the electrolyte concentration range from 0 to 20g/l.
  • the electrolyte concentration range from 5 to lOg/1.
  • the treatment liquor include a cross-linking agent for forming bonds between the hydrophobic agent and the cotton or other cellulosic fibres.
  • Hydrophobic agents that contain isocyanate cross-linkers that bond the fibre and/or to the substratate may be beneficial to this treatment.
  • cross-linking agent may also become fixed to the cell ⁇ losic fibre itself.
  • a cross-linking agent may react with the hydroxyl groups present on the surface of the cotton fibres and/or other types of cellulosic fibres.
  • the principal advantage in using a cross-linking agent is to increase the durability of the hydrophobic agent to laundering.
  • cross- linking agent be heat activated.
  • the method also include a heat curing step in which the pre-treated yarn is heated to a temperature ranging from 50 to 230 0 C.
  • the curing step involve heating the pre-treated yarn to a temperature ranging from 110 to 190 0 C.
  • the heat curing step may be carried out for any suitable period; however, periods ranging from 1 second to 40 minutes are preferred. It is more preferred that the heat curing step is carried out for a time period ranging 30 seconds to 20 minutes or any period within that range.
  • the heat curing step may be carried out at a variety of different stages of the method of the present invention, such as either before or after step b) .
  • a knitting lubricant can be applied to a yarn pre- treated according to step a) to facilitate knitting and the knitting lubricant can subsequently be removed using conventional scouring techniques before or after curing without adversely effecting the hydrophobic pre-treatment.
  • the curing step is carried out after step b) .
  • the heat curing step is carried out before the yarn is knitted or woven with another yarn.
  • a garment including the fabric as described above.
  • the fabric from which the garment is made may also include any one or a combination of the preferred or optional features described above.
  • the garment may be any outer garment such as a pair trousers, a shirt or a jacket, it is preferred that the garment be a base layer garment worn against the skin.
  • Fabrics as described herein may also be used as a component of an item of clothing or clothing system. For example, these fabrics can be laminated to one face of a functional film together with a second fabric on the other face using well know lamination technology such as adhesive printing or coating. They can also be used as both faces of such a construction to produce a reversible fabric.
  • the functional film can be a waterproof and/or windproof breathable membrane. Liquid sweat picked up is transported to the hydrophilic layer next to the adjoining functional film and can influence the breathability of the film in a positive way. Laminated fabrics of this type are well suited for industrial and outdoor sports applications.
  • Figure 1 is a structural profile of a section of fabric in accordance with an embodiment of the invention.
  • Figures 2 and 3 are flow diagrams illustrating the method steps for making a fabric according to alternative embodiments of the invention.
  • the fabric is preferably made from two or more yarns consisting entirely of cotton yarns.
  • the cotton yarns may be partially or completely substituted with other types of cellulosic fibres or even synthetic fibres.
  • other embodiments of the present invention may have yarns that are made entirely of man-made fibres or blends of the synthetic and cellulosic fibres.
  • the fabric shown in Figure 1 includes an inner face generally identified by reference numeral 10 that is made entirely from yarns containing cotton fibres that prior to fabric formation have been pre-treated in the form of a yarn with a hydrophobic agent in accordance with the method described herein.
  • the pre-treated yarn exhibits a substantially permanent hydrophobic property and is arranged such that the inner face 10 of the fabric has a substantially uniform hydrophobic surface.
  • an outer face of the fabric identified by reference numeral 20 is made from yarns containing cotton fibres that are not pre-treated with a hydrophobic agent and have been scoured so that they exhibit the natural hydrophilic properties of the cellulosic surface.
  • the difference in hydrophilicity or surface energy between the inner face 10 and outer face 20 of the fabric enables liquid to be wicked through the fabric from inside to outside in the direction of the arrows 30 shown in Figure 1.
  • the fabric preferably has a layered structure in which the hydrophobic and hydrophilic cotton yarns 11 and 12 respectively are intermeshed within the fabric so as to bring the hydrophilic yarn 12 toward the inner face 10 of the fabric but not actually form part of that face 10. More particularly, as shown in figure 1, it is preferred that the hydrophobic yarn 11 be assembled so as form loops or floats 13 that form the inner face 10 of the fabric.
  • the loops and floats 13 are spaced sufficiently apart to allow liquid such as sweat: drops to penetrate between the loops and floats 13 and when located between the loops 13 the liquid is able to make contact with the hydrophilic yarn 12 that forms part of the outer face of the fabric.
  • the hydrophilic yarn 12 draws liquid through the inner face 10 to the outer face 20 of the fabric. External pressure applied to the liquid such as pressure on the liquid caused by movement between the fabric and skin of a person wearing the fabric. In any event once the wicking path is created, wicking can continue until all the liquid is removed from the inner face 10 of the fabric or until the capacity of the hydrophilic yarn 12 to store liquid is exhausted.
  • Figure 1 illustrates the loops or floats 13 separated over by relatively consistent spaces, it will be appreciated that the spacing between the hydrophobic yarn of a fabric is likely to vary at least to some extent in view of current manufacturing variables including yarn tension and diameter.
  • the fabric pattern may be having two or more than two loops 13 immediately adjacent to one another at regular intervals, yet be spatially separated from neighbouring loops.
  • the nett result is that the inner face 10 of the fabric has a hydrophobicity that is substantially the same over the inner face 10 and the loops 13 are assembled so that sections of the hydrophobic yarn 11, typically the loops 13, are separated so as to form spacing or voids without hydrophobic yarns in the inner face 10 into which liquid can penetrate and make contact with the hydrophilic yarn 12. The liquid can then be wicked to the outer face of the fabric as described above.
  • Figure 2 is a flow diagram according to an embodiment of the present invention in which cotton fibres spun into yarns are wound onto one or more tubes to form yarn packages at a first stage.
  • the yarn packages are initially scoured then treated with liquor containing a hydrophobic agent, so that the agent is adsorbed directly onto the cotton fibres.
  • the hydrophobic agent is preferably a fluoroacrylate polymer.
  • the liquor may include a heat-activated cross-linking agent that is applied to the cotton yarn during the hydrophobic pre-treatment stage.
  • the liquor preferably includes the hydrophobic agent as an emulsion.
  • the rate at which the hydrophobic agent is deposited onto the cotton fibres and the uniformity of the deposition of the hydrophobic agent throughout the yarn packages will depend on a number of operational parameters including the size and concentration of the particles in the emulsion, the residence time or period over which the yarns are treated, the temperature of the liquor and the rate at which the temperature is raised between a start temperature and a finish temperature.
  • the rate of uptake of the particles from the emulsion is also a function of the concentration of electrolyte, such as sodium sulphate, contained by the liquor. Indeed, in order to achieve complete exhaustion of the particles from the liquor, an optimal concentration of electrolyte may be required to avoid flocculation of hydrophobic agent or deposition of the hydrophobic agent on equipment items.
  • the particle size of this emulsion at room temperature is less than 500nm. It is even more preferred that the particle size of the emulsion at room temperature is less than 240nm and most preferred if the size is less than 120nm.
  • the cotton yarns are processed in a heat curing oven to activate the cross-linking agent.
  • the cross-linking agent can form bonds between the hydrophobic agent adsorbed onto the cotton fibres and depending on the type of the cross-linking agent, it may itself also bond with the cotton fibre.
  • the purpose of the cross-linking agent is to further increase the resistance of the hydrophobic treatment to laundering.
  • the heat curing stage heats the cotton fibres to a substantially uniform temperature of approximately 150 0 C. In order to achieve a substantially uniform temperature in the least amount of time the yarn may be unwound from each yarn package.
  • a friction-reducing knitting lubricant is then applied to the pre-treated yarn and the yarn knitted with a second, hydrophilic cotton yarn to form a fabric into a differential wicking structure.
  • the fabric is then scoured to remove the knitting lubricant prior to the fabric being converted into a garment.
  • the hydrophobic treatment stage may be carried out using any suitable technique that allows the hydrophobic agent to contact and become fixed to the cotton fibres.
  • suitable techniques that may be employed for contacting the fibres with the liquor include padding, foam application, lick rollers, dip-hydro, spraying, printing and doctor blade.
  • the liquor contacts the cotton fibres by submerging the cotton fibres in the liquor.
  • An example of a process in which fibres are submerged in a liquid is an exhaust process. Conventionally, exhaust processes have been used for dyeing fibres with colour dyestuffs.
  • Figure 3 is a flow diagram of an alternative embodiment that is the same as the embodiment shown in Figure 2, save for the heat curing step being carried out on the cotton yarn after the hydrophobic yarn has been formed into a fabric.
  • Figure 3 illustrates a method including the stages of: i) spinning and winding a cotton yarn onto a tube; ii) scouring the yarn to remove surface contaminants; iii) adsorbing a hydrophobic agent onto the cotton yarn in a pre-treatment stage; iv) knitting or weaving the pre-treated yarn with at least one other yarn so as to make a fabric; v) removing lubricants and other processing aids from the fabric using conventional scouring techniques; vi) heat curing the hydrophobic agent and cross-linking agent if present; and finally converting the fabric into a garment.
  • the heat curing stage may be carried out before the scouring.
  • the liquor containing the hydrophobic and cross- linking agents may also include a knitting lubricant that is applied to the cotton yarns during the hydrophobic pre- treatment stage.
  • test specimens of fabric are selected and stored at relative humidity of 65% at 20 0 C for a period of 4 hours prior to testing to ensure homogeneous moisture content in the fabric.
  • a fixed volume of water is then placed near the centre of the inside face of each specimen using a pipette. After the water has been totally absorbed, the fabric is sandwiched between two pieces of absorbent paper and laid flat for a short time with pressure applied uniformly over the surface. The weight of water absorbed by each piece of paper is measured and recorded. The ratio of these two weights is quoted as the mass wicking ratio.
  • the test is repeated with the opposite face upward and the results averaged to eliminate gravitational effects.
  • An alternative means of assessing the effect of differential wicking is to measure the area of spread of the water on each face of test specimens prepared as described in the preceding test immediately after a fixed volume of water has been fully absorbed. The ratio of these two areas is quoted as the area wicking ratio.
  • Fabric type 1 is a conventional 100 % cotton fabric.
  • Fabric type 2 is a prior art cotton fabric that has a hydrophobic layer printed on the inner face of the fabric in accordance with other commercially available fabrics.
  • Fabric type 3 is a cotton fabric comprising a hydrophobic inner face made from a hydrophobic yarn in accordance with an embodiment of the present invention.
  • Fabric type 4 is a prior art fabric comprising an inner face made with a polypropylene yarn and an outer face made with a cotton yarn.
  • Fabric type 5 is a prior art fabric in the form of a polyester double-knit.
  • This Example demonstrates fabrication of a double knit fabric manufactured from hydrophilic cotton yarn for the outer face and hydrophobic cotton yarn for the inner face. Both yarns are first scoured and bleached using a conventional cotton procedure. This renders the surface of the cotton hydrophilic. The yarn to be used for .the inner face of the fabric is then treated with Nuva TTC (Clariant) by an exhaust process using the apparatus and method described above to render it hydrophobic. The yarn package size used is 90Og wound to a density of 0.3g/cc and the yarn is treated under the follows conditions:
  • the liquor clears progressively during the treatment cycle and at the end of the treatment time, the liquor is completely clear, indicating that exhaustion onto the yarn is complete.
  • the liquor is drained from the apparatus without rinsing and the yarn packages hydro-extracted and dried at 80 0 C.
  • the yarn is then rewound and waxed with a paraffin lubricant prior to knitting.
  • Fabric manufacture is carried out on a double- jersey knitting machine. After knitting, the fabric is scoured to remove the knitting wax for 30 minutes at 65°C in the presence of lg/L Hostapal FA-Z (Clariant) and lg/L sodium carbonate. The liquor is drained at a temperature of 65 0 C to prevent re-deposition of the emulsified wax. The fabric is rinsed twice for 10 minutes at 4O 0 C, hydro- extracted and dried on a stenter. During the drying process the fabric is subjected to a temperature of 145°C for 5 minutes to cure the hydrophobic agent. The fabric exhibits differential wicking behaviour that is retained for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO 6330 with ECE detergent, while tumble drying is carried out cool for 60 minutes.
  • Example One This example is the same as Example One, save for the step of curing the fabric being carried out after knitting and before the final scour to remove lubricant.
  • the fabric exhibits differential wicking behaviour that is retained for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO
  • Example 3 This example is the same as Example One, except for the softener/lubricant Sandolube SVN being co-applied with the hydrophobic agent at the rate of 1% on mass of fibre during the yarn treatment step.
  • the Sandolube replaces the paraffin knitting lubricant added during re- winding in Example One.
  • the fabric exhibits differential wicking behaviour that is retained for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO 6330 with ECE detergent, while tumble drying is carried out cool for 60 minutes.
  • Example 2 finished fabric prepared using the procedure described in Example One is piece dyed using a conventional reactive dyeing procedure applicable to cotton goods.
  • the fabric exhibits differential wicking behaviour that is retained for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO 6330 with ECE detergent, while tumble drying is carried out cool for 60 minutes.
  • Example 5 This example is the same as Example One, save for both yarns being dyed prior to treatment and knitting into fabric using conventional cotton colouration technology. In this instance, the preparatory scouring and bleaching step are not required.
  • the yarn to be used for the hydrophobic face is given a mild scour with sodium carbonate to remove any residual contaminants and loose dyestuff prior to treatment with the hydrophobic agent.
  • the fabric exhibits the required differential wicking behaviour for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO 6330 with ECE detergent, while tumble drying is carried out cool for 60 minutes.
  • Example One is the same as Example One, save for the hydrophobic yarn being prepared by a knit-de-knit process with the hydrophobic agent applied to the fabric by a conventional pad/dry/cure process.
  • the cotton yarn used for the hydrophobic face is first scoured and bleached then knitted into a single jersey tube on a single-feed FAK laboratory machine.
  • Nuva TTC is padded onto the tubular fabric piece at 5% on mass of fabric by means of a small mangle.
  • the fabric is subsequently dried and the polymer heat cured.
  • the yarn is unravelled from the piece (de-knitted) , re-wound and waxed in preparation for knitting.
  • the fabric exhibits differential wicking behaviour that is retained for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO 6330 with ECE detergent, while tumble drying is carried out cool for 60 minutes.
  • Example 7 In this example the yarn to be used for the inner face of the fabric is treated with Ruco-Dry DFE (Rudolf Chemie) as a hydrophobic agent.
  • Ruco-Dry DFE Rudolf Chemie
  • the method and apparatus for carrying out the manufacture and all operating conditions of the treatment process are the same as described in Example ONE, save for the following treatment conditions:
  • the fabric exhibits the required differential wicking behaviour for a minimum of 30 home laundry wash and tumble dry cycles. Washing is carried out at 60 0 C using a 2A
  • This Example demonstrates fabrication of a double knit fabric manufactured from 1/3Os Cotton Count (20 Tex) hydrophilic cotton yarn for the outer face and 1/5Os Cotton Count (12 Tex) hydrophobic cotton yarn for the inner face. Both yarns are scoured and the hydrophobic yarn treated as for Example One. Fabric manufacture is carried out on a double- jersey knitting machine of 28 needles per inch (28 gauge) . At the first knitting point or feed, the hydrophilic yarn is knitted on all needles on one needle bed only. This is repeated at the next feed. At the third feed, the hydrophobic yarn is knitted on alternate needles of the second needle bed and tucked across to alternate needles of the first bed.
  • the fabric has a mass ratio of hydrophilic yarn to hydrophobic yarn of 75:25.
  • the liquid water buffering index K f of the fabric when measured by the procedure described on page 27 is 0.99 and its moisture sorption index i B is 0.7, both of which are within the range of preferred values for these properties.
  • the mass wicking ratio determined by the test method described above is 18:1. Differential wicking behaviour is retained for in excess of 30 cycles of home laundering and tumble drying. Washing is carried out at 6O 0 C using a 2A Cotton Cycle in accordance with ISO 6330 with ECE detergent, while tumble drying is carried out cool for 60 minutes.
  • fabrics manufactured in accordance with the present invention satisfy performance criteria that can be measured in accordance with standard tests of the Hohenstein Institute of B ⁇ nnigheim, Germany.
  • the tests are designed to rate the liquid water wicking and drying behaviour of fabrics and may be summarized as follows. 1. THE BUFFERING CAPACITY AGAINST LIQUID WATER, K f
  • K f The determination of K f is carried out on a guarded hot plate located within a climate-controlled cabinet.
  • a system incorporating these two items known widely as the Hohenstein Skin Model, has a specific configuration and a defined airflow across the hot plate.
  • the central plate dimensions are 20cm x 20cm and the plate is heated to a temperature of 35°C.
  • the conditions within the cabinet are controlled at 35°C and 30% relative humidity.
  • An impermeable film is placed on the surface of the guarded hot plate and a thin, wicking polyester fabric is placed over the film.
  • Test specimens measuring 21cm x 21cm are used, pre-conditioned for 12 hours prior to the test at the same temperature and humidity as the air in the cabinet.
  • the quantity of 15cc of distilled water at a temperature of 35°C is uniformly distributed over the polyester with a hypodermic syringe and the test specimen is immediately placed over it, centred on the plate.
  • the amount of water evaporated into the cabinet Gi is determined from the mass of water removed from the air in the cabinet in order to maintain constant humidity conditions.
  • the amount of water remaining in the fabric G 2 is determined by subtracting the conditioned mass of the specimen from the final mass.
  • the buffering index K f is the ratio of the sum of these components to the initial mass G 0 .
  • the test is carried out in an atmosphere of 20 0 C and 65% relative humidity on fabric specimens approximately 2cm x 3cm pre-conditioned for 24 hours.
  • the specimens are fixed onto a flat table with double-sided tape with the side normally in contact with the skin facing upwards.
  • a drop of distilled water of volume 42 ⁇ l is mechanically dispensed from a syringe located 5cm above the centre of the test specimen at the rate of 13.76 ⁇ l/s.
  • the sorption index i B is the time taken for this drop to be completely absorbed, that is, for the contact angle of the drop i B to fall to 0°.
  • the drop rate is best monitored by a software-controlled video camera system.

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Abstract

La présente invention décrit un tissu dont la face interne (10) est constituée d’un fil traité pour être hydrophobe (11). Ledit fil est assemblé de façon à permettre à un liquide de traverser le réseau de fils hydrophobes et d’entrer en contact avec les fils hydrophiles (12) qui constituent la face externe (20) du tissu. Dans un mode préféré de l'invention, les fils sont constitués de fibres de coton.
PCT/AU2005/001638 2004-10-22 2005-10-21 Tissu et méthode de fabrication dudit tissu WO2006042375A1 (fr)

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JP2007537073A JP2008517178A (ja) 2004-10-22 2005-10-21 布帛及びその製造方法
US11/409,113 US20070093162A1 (en) 2004-10-22 2006-04-21 Fabric and a method of making the fabric

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US7842625B1 (en) 2006-10-26 2010-11-30 Nano-Tex, Inc. Methods for treating fabric to facilitate moisture transfer from one side to the other
US20150128652A1 (en) * 2012-02-28 2015-05-14 Bauerfeind Ag Meshwear with different zones in stress-elongation behaviour
CN106521781A (zh) * 2016-12-20 2017-03-22 江苏东源纺织科技实业有限公司 抽条风格的混纺高弹环保面料的生产工艺
EP4123086A1 (fr) 2021-07-19 2023-01-25 The Procter & Gamble Company Traitement des tissus
WO2023003632A1 (fr) 2021-07-19 2023-01-26 The Procter & Gamble Company Traitement de tissu

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