WO2017027735A1 - Tissu actionné par liquide pour la prise en charge de la température corporelle et du niveau d'humidité - Google Patents

Tissu actionné par liquide pour la prise en charge de la température corporelle et du niveau d'humidité Download PDF

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Publication number
WO2017027735A1
WO2017027735A1 PCT/US2016/046615 US2016046615W WO2017027735A1 WO 2017027735 A1 WO2017027735 A1 WO 2017027735A1 US 2016046615 W US2016046615 W US 2016046615W WO 2017027735 A1 WO2017027735 A1 WO 2017027735A1
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WO
WIPO (PCT)
Prior art keywords
fabric layer
polymer film
liquid
garment
fabric
Prior art date
Application number
PCT/US2016/046615
Other languages
English (en)
Inventor
Tingrui Pan
Yahui YANG
Original Assignee
The Regents Of The University Of California
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 The Regents Of The University Of California filed Critical The Regents Of The University Of California
Publication of WO2017027735A1 publication Critical patent/WO2017027735A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F13/45—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 shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • A61F13/47263—Sanitary towels, incontinence pads or napkins specially adapted for female use with activating means, e.g. elastic, heat or chemical activatable means

Definitions

  • the technology of this disclosure pertains generally to methods of cooling a person wearing a garment, and more particularly to garments that respond to changes in moisture levels.
  • This disclosure describes a fabric/polymer liquid-actuated element that can bend from a flat state to a curved state when it absorbs liquid.
  • the liquid-actuated element retains the curvature as long as the fabric is wet, and can provide windows or vents in garments for cooling; e.g., sportswear worn on a perspiring body.
  • the fabric In the absence of external liquid (i.e., after university activities), the fabric dries out due to evaporation and the liquid-actuated element recovers its original flat shape.
  • FIG. 1 is a schematic plan view of a fabric substrate with one
  • FIG. 2 is a cross-section view of the structure of FIG. 1 taken
  • FIG. 3 is a schematic view in cross-section showing the layers of the liquid-actuated element along with a cover layer and adhesive according to an embodiment of the presented technology.
  • FIG. 4 is a schematic representation of photographs of different configurations of liquid-actuated elements in the dry (normal) state according to embodiments of the presented technology.
  • a section of a hydrophilic fabric substrate material 10 is partially cut into a desired shape.
  • a cut 12 in the substrate material forms a flap section 14 with a "U"-shape that resembles a partial ellipse (e.g., half ellipse), with a first end 16 detached from the substrate material (e.g., a free end), detached (free) sides 18a, 18b, and a second end 20 that remains attached.
  • This particular shape is shown only by way of illustration and other shapes can be used. Examples of shapes include rectangles, squares, semi-circles, triangles, and other shapes provided that they are configured as described herein with a free (detached) end, at least one free (detached) side, and an attached end.
  • iron-on tape 26 (see FIG. 3) is used as an adhesive material to attach the polymer film to the fabric at the attachment points.
  • Other types of adhesive materials could be used as well, but any adhesive material used should be sufficiently thin that the opposing faces of the fabric layer and the polymer layer are not held apart but can contact each other.
  • a garment having one or more of the above-described liquid-actuated elements would be worn such that it directly contacts the skin of the wearer.
  • the article of clothing could contact an under-layer garment.
  • the term "garment” is intended to encompass any article of clothing, including shirts, pants, shorts, outerwear, undergarment, socks, headwear, and hand wear.
  • liquid e.g., water, perspiration
  • the liquid spreads out quickly through the hydrophilic fabric and a thin liquid film is formed between the fabric layer 14 and the strip of polymer film 22.
  • the thin liquid film helps to adhere the two layers 14, 22 together, which ensures that one side of the polymer film is in complete contact with liquid.
  • the side of the polymer material facing the fabric layer absorbs liquid to a certain extent and expands, whereas no expansion occurs to the other side of the polymer that faces outward and which stays dry.
  • the fabric layer Since the fabric layer is adhered to the strip of polymer film not only by the attachment points but by the liquid interface, the fabric moves in the direction of movement of the strip of polymer film. That is, when the fabric is wetted, the strip of polymer film pulls the fabric layer away from the plane in which the fabric layer lies. Generally speaking, more movement of the free end is expected than of the sides.
  • fabric/polymer film liquid-actuated elements is incorporated into an article of clothing by sewing one or more fabric sections with the liquid-actuated element into the article of clothing.
  • the article of clothing is made from fabric having one or more of the above-described liquid-actuated elements. Accordingly, the present technology
  • Bulk fabric substrate is the major material of a garment, and may be in direct contact with the skin or an under-layer garment.
  • This fabric layer can be made of natural or synthetic materials, or mixtures of them, as long as the material can absorb liquid such as water, perspiration, etc.
  • the material can be, for example, woven, knit, or non-woven material.
  • Patterns can be designed and laser-cut into the bulk fabric substrate.
  • these patterns serve the same purpose as the non-patterned areas of the fabric substrate; namely, to cover the body surface and maintain the body temperature. In a wet state, these patterns bend outward and upward, thereby opening windows or vents for better perspiration evaporation and air ventilation.
  • the soft fabric layer does not bend when wetted. It is the polymer film that actuates the bending. Accordingly, the polymer film is the key functional component of the liquid-actuated element.
  • the polymer film should absorb liquid (e.g., water/perspiration) and expand in volume.
  • the material should be very light to be integrated onto garments; (2) the material is not rigid or sharp so that it does not cut through the fabric; (3) the material is water absorbent and expands (even very slightly) after it absorbs water; (4) the film has a combination of strength and pliability, so it can bend upon asymmetric expansion.
  • the absolute length and the length-to-width ratio should be greater than minimum values. These values were experimentally determined for the above stated cellulose di-acetate film to be a minimum length-to-width ratio of about 1 .5 and the smallest length of about 20 mm for the pattern to be actuatable. It will be appreciated that these values may vary upon different film thickness or different materials, and can be experimentally determined.
  • the polymer film is laser-cut into small pieces having a desired geometric shape. This does not mean that the segments of polymer film should be cut into exactly the same size and shape as the fabric layers 14.
  • the polymer film is cut into segments (e.g., geometric strips) that function as "frames" for the fabric patterns.
  • the polymer film can be creatively designed into various patterns as long as the pattern can "roll up” the whole piece of fabric pattern during bending stage.
  • the patterned polymer film is carefully aligned and attached to the fabric patterns through small pieces of iron-on tape or other suitable adhesive material.
  • the partial "point" attachment ensures that the major area of the polymer layer is in direct contact with the fabric layer and can become wetted when the fabric layer absorbs liquid.
  • the iron-on tape attaches the two layers together, but it also blocks the transportation of liquid from the fabric layer to the polymer film. Therefore, only small patches of iron-on tape are used to bond the fabric layers and polymer layers together.
  • the tape is thinner than about 100 microns. At such a small thickness, it pulls and bonds the two flexible layers together instead of creating a gap. This also ensures the good contact between the two layers even when they are curved, and enhances the wetting of one side of polymer layer when the fabric layer is primed with liquid.
  • the polymer layer optionally can be covered by an decorative
  • the cover material does not have to be decorative.
  • iron-on tape 28, or other suitable flexible and moisture resistant adhesive can be used to attach an outer cover 30 of fabric or other flexible material to the polymer layer.
  • the iron-on tape 28 and cover 30 should be sufficiently thin and flexible as not to impede bending of the polymer film.
  • the iron-on tape blocks liquid from reaching the polymer film even when the cover material gets wet. Therefore, the upper surface of the polymer film always stays dry while the lower surface can be wetted and expand. This helps to ensure the maximum asymmetry in expansion, which makes the bending one-directional, easy to actuate and sensitive to stimulus.
  • an outer fabric cover layer is firstly bonded to a polymer layer. Next, those bonded layers are laser-cut into the designed patterns. Finally, the cut patterns of polymer film with the fabric covers are attached to the bottom fabric layers as described above.
  • FIG. 4 and FIG. 5 show schematic representations of photographs of a prototype with several different configurations of liquid-actuated elements according to the present technology.
  • the different patterns are depicted as cover layers 30 on fabric layers 14. Since the cover layers only need to cover the polymer layers, the figures illustrate the fact that the polymer film 22 does not need to match the shape of the fabric layers.
  • FIG. 4 illustrates the liquid-actuated elements in their dry, or normal state, where the fabric layers 14 and polymer film 22 are flat and lying in the plan of the substrate material 10.
  • FIG. 5 illustrates what was observed when those same elements were actuated by wetting, where they bend to establish windows or vents 32 in the substrate material. Note that bending of the fabric layers 14 can occur even if the polymer layers have substantially different shapes.
  • the density of the elements would not need to be so high and the density could be any desirable density.
  • Advantages of the technology may include:
  • the liquid-actuated elements help control and manage body temperature and moisture level by actuating the opening of small windows or vents.
  • Garments can be made which function similar to air-conditioning, in which body surface temperature and moisture level can be controlled from being too high. This can improve the overall comfort of the wearing experience, but can also enhance the wearer's performance under physically demanding activities.
  • liquid-actuated elements are naturally actuated by body perspiration. No external power or heat source is required. This greatly reduces the overall weight, cost and manufacturing complexity.
  • liquid-actuated elements are able to autonomously recover their initial shapes, which will keep the body warm when the liquid-actuated elements dry out in non-perspiring or lower temperate environments.
  • the liquid-actuated elements can bend and recover repetitively.
  • liquid-actuated elements are highly integratable and
  • liquid-actuated elements can be used for fashion design of garments by converting two-dimensional patterns to three-dimensional structures (similar to origami) when actuated.
  • liquid-actuated elements are lightweight and low cost.
  • liquid-actuated elements do not require the use of materials that have a negative Poisson's ratio, and therefore, do not require a auxetic feature to function.
  • a material for use in a garment comprising: (a) a hydrophilic fabric substrate material; (b) a hydrophilic fabric layer formed from a section of the substrate material; (c) wherein the fabric layer is partially attached to the substrate material and movable in relation to the substrate material; and (d) a polymer film having first and second sides with the first side partially attached to the fabric layer; (e) wherein when liquid is deposited onto the fabric layer: (i) the liquid spreads out through the fabric layer; (ii) the first side of the polymer film absorbs at least a portion of the liquid and expands; (iii) the second side of the polymer film remains dry and does not expand; (iv) asymmetric expansion of the polymer film results in bending of the polymer film and the fabric layer in relation to the substrate material; and (v) wherein an opening is formed in the substrate material when the fabric layer is wetted by a liquid.
  • improvement comprising: (a) a hydrophilic fabric layer formed from a section of the substrate material; (b) wherein the fabric layer is partially attached to the substrate material and movable in relation to the substrate material; and (c) a polymer film having first and second sides with the first side partially attached to the fabric layer; (d) wherein when liquid is deposited onto the fabric layer: (i) the liquid spreads out through the fabric layer; (ii) the first side of the polymer film absorbs at least a portion of the liquid and expands; (iii) the second side of the polymer film remains dry and does not expand; (iv) asymmetric expansion of the polymer film results in bending of the polymer film and the fabric layer in relation to the substrate material; and (v) wherein an opening is formed in the substrate material when the fabric layer is wetted by a liquid.
  • a garment having a dynamic structure comprising: (a) a carrier material of flexible fabric; and (b)a plurality of dynamic material portions physically associated with the carrier material; (c) wherein each of the dynamic material portions is physically responsive to a liquid stimulus; and (d) wherein each said dynamic material portion comprises: (i) a hydrophilic fabric layer formed from a section of the carrier material; (ii) wherein the fabric layer is partially attached to the carrier material and movable in relation to the carrier material; and (iii) a polymer film having first and second sides with the first side partially attached to the fabric layer; (e) wherein when liquid is deposited onto the fabric layer: (i) the liquid spreads out through the fabric layer; (ii) the first side of the polymer film absorbs at least a portion of the liquid and expands; (iii) the second side of the polymer film remains dry and does not expand; (iv) asymmetric expansion of the polymer film results in bending of the polymer film and the fabric layer in relation to
  • garment is selected from the group consisting of shirts, pants, shorts, outerwear, undergarment, socks, headwear, and hand wear.
  • a multilayer material comprising: a hydrophilic fabric layer; and a polymer film having first and second sides with the first side partially attached to the fabric layer; wherein when liquid is deposited onto the fabric layer, the liquid spreads out through the fabric layer and a thin liquid film is formed between the fabric layer and the polymer film.
  • any preceding embodiment wherein the thin liquid film functions to adhere the fabric layer to the polymer film; wherein one side of the polymer film is in contact with the thin liquid film; wherein the first side of the polymer film absorbs at least a portion of the liquid and the first side of the polymer film expands; and wherein the second side of the polymer film remains dry and wherein no expansion occurs on the second side.
  • garment is selected from the group consisting of shirts, pants, shorts, outerwear, undergarment, socks, headwear, and hand wear.
  • the improvement comprising: a hydrophilic fabric layer; and a polymer film having first and second sides with the first side partially attached to the fabric layer; wherein when liquid is deposited onto the fabric layer, the liquid spreads out through the fabric layer and a thin liquid film is formed between the fabric layer and the polymer film.
  • the improved garment of any preceding embodiment wherein the thin liquid film functions to adhere the fabric layer to the polymer film; wherein one side of the polymer film is in contact with the thin liquid film; wherein the first side of the polymer film absorbs at least a portion of the liquid and the first side of the polymer film expands; and wherein the second side of the polymer film remains dry and wherein no expansion occurs on the second side.
  • a garment having a dynamic structure comprising: a carrier material of flexible material; a plurality of dynamic material portions physically associated with the carrier material; the plurality of dynamic material portions being geometrically responsive to a liquid stimulus;
  • each said dynamic material portion comprises: (a) a hydrophilic fabric layer; and (b) a polymer film having first and second sides with the first side partially attached to the fabric layer; (c) wherein when liquid is deposited onto the fabric layer, the liquid spreads out through the fabric layer and a thin liquid film is formed between the fabric layer and the polymer film.
  • bending and shape recovery process is repeatable; and wherein bending is actuated by absorbing liquid.
  • garment is selected from the group consisting of shirts, pants, shorts, outerwear, undergarment, socks, headwear, and hand wear.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne tissu traité d'une manière spéciale qui, lorsqu'il absorbe du liquide et devient humide, passe d'un état plat à un état arqué. Le tissu maintient la courbure tant qu'il est humide. Lorsque le tissu sèche, il retrouve sa forme plate initiale. En incorporant des éléments structurés (par exemple, des rabats) du tissu dans un vêtement, les éléments s'ouvriront et permettront que le vêtement "respire" lorsque l'utilisateur transpire.
PCT/US2016/046615 2015-08-12 2016-08-11 Tissu actionné par liquide pour la prise en charge de la température corporelle et du niveau d'humidité WO2017027735A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562204347P 2015-08-12 2015-08-12
US62/204,347 2015-08-12

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WO2017027735A1 true WO2017027735A1 (fr) 2017-02-16

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462541A (en) * 1990-11-13 1995-10-31 Kimberly-Clark Corporation Pocket-like diaper or absorbent article
US6083602A (en) * 1988-03-14 2000-07-04 Nextec Applications, Inc. Incontinent garments
US6441268B1 (en) * 1996-12-17 2002-08-27 Sca Hygiene Products Ab Absorbent structure that has a high degree of utilization
US7179247B2 (en) * 2002-11-18 2007-02-20 Uni-Charm Corporation Absorbable article with protruding body fluid inflow hole having an elastic side wall
US20090306614A1 (en) * 2006-06-30 2009-12-10 Sca Hygiene Products Ab Top layer for an absorbent article
WO2014085974A1 (fr) * 2012-12-04 2014-06-12 Kimberly-Clark Worldwide, Inc. Article absorbant pourvu d'une feuille supérieure à plusieurs couches
US20140288477A1 (en) * 2009-03-26 2014-09-25 Medical Devices, Inc. Vented emergency wound dressings
US20150216714A1 (en) * 2012-11-08 2015-08-06 Unicare Corp. Diaper unit and outer diaper wrapper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6083602A (en) * 1988-03-14 2000-07-04 Nextec Applications, Inc. Incontinent garments
US5462541A (en) * 1990-11-13 1995-10-31 Kimberly-Clark Corporation Pocket-like diaper or absorbent article
US6441268B1 (en) * 1996-12-17 2002-08-27 Sca Hygiene Products Ab Absorbent structure that has a high degree of utilization
US7179247B2 (en) * 2002-11-18 2007-02-20 Uni-Charm Corporation Absorbable article with protruding body fluid inflow hole having an elastic side wall
US20090306614A1 (en) * 2006-06-30 2009-12-10 Sca Hygiene Products Ab Top layer for an absorbent article
US20140288477A1 (en) * 2009-03-26 2014-09-25 Medical Devices, Inc. Vented emergency wound dressings
US20150216714A1 (en) * 2012-11-08 2015-08-06 Unicare Corp. Diaper unit and outer diaper wrapper
WO2014085974A1 (fr) * 2012-12-04 2014-06-12 Kimberly-Clark Worldwide, Inc. Article absorbant pourvu d'une feuille supérieure à plusieurs couches

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