WO2011091127A2 - Extended wear shoe liner with silver - Google Patents

Extended wear shoe liner with silver Download PDF

Info

Publication number
WO2011091127A2
WO2011091127A2 PCT/US2011/021843 US2011021843W WO2011091127A2 WO 2011091127 A2 WO2011091127 A2 WO 2011091127A2 US 2011021843 W US2011021843 W US 2011021843W WO 2011091127 A2 WO2011091127 A2 WO 2011091127A2
Authority
WO
WIPO (PCT)
Prior art keywords
insert
shoe
layer
top layer
silver
Prior art date
Application number
PCT/US2011/021843
Other languages
French (fr)
Other versions
WO2011091127A3 (en
Inventor
Jennifer M. Chu
Original Assignee
Chu Jennifer M
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 Chu Jennifer M filed Critical Chu Jennifer M
Publication of WO2011091127A2 publication Critical patent/WO2011091127A2/en
Publication of WO2011091127A3 publication Critical patent/WO2011091127A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/003—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material
    • A43B17/006—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material multilayered
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/0045—Footwear characterised by the material made at least partially of deodorant means
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/009—Footwear characterised by the material made at least partially of washable material
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/02—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined wedge-like or resilient
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/10—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined specially adapted for sweaty feet; waterproof
    • A43B17/102—Moisture absorbing socks; Moisture dissipating socks
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/18—Arrangements for attaching removable insoles to footwear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
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    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
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    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
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    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
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    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
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    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
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    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
    • D06M11/42—Oxides or hydroxides of copper, silver or gold
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • 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
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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Definitions

  • the present invention relates to a personal care item, primarily for men and women, but it can also be used by youngsters, too.
  • the item is an insertable and selectively removable shoe insert which is intended to absorb moisture and odor.
  • shoe liners, inserts and insoles exist today with the primary objective of providing cushioning and/or support to the user. Most of these products are made of foams or plastics and designed to be long lasting. These insoles typically change the feel of the shoe while worn, due to the thickness of the products.
  • the present shoe insert device which is a thin and convenient, extended wear shoe liner that preserves the life of shoes by preventing interior wear and promotes a more comfortable and hygienic environment for the feet.
  • the shoe liner is made up of a moisture absorbent, antimicrobial top layer and an anti-slip bottom layer. Silver, a naturally occurring and proven antimicrobial, is incorporated into the top and/or bottom layers to destroy bacteria and odor within the shoes.
  • the top layer which comes into direct contact with the bottom of foot, functions to keep the foot and shoe interior dry and odor free. It is made of a fabric, a woven or non- woven textile, which serves to absorb and wick away moisture from the foot. The textile is highly durable while also being soft and comfortable to the skin. By absorbing excess moisture, the top layer provides better traction for and prevents slippage of the feet within the body of the shoe.
  • the top layer has a preferred thickness of less than 1mm to minimize the thickness of the shoe insert device. In other aspects of the shoe insert device, the top layer may comprise a thicker material to provide for added comfort and cushioning.
  • the top layer also has a good abrasion resistance under dry and wet conditions as determined by the Martindale, Taber or similar abrasion resistance tests.
  • the top layer is bonded to the bottom layer by heat sealing, stitching, flame lamination or adhesive lamination.
  • the bottom layer has anti-slip capabilities and prevents movement of the shoe liner in relation to the shoe without the use of adhesives.
  • the bottom layer also has a preferred thickness of less than 1mm to minimize the thickness of the shoe liner, however, other aspects of the shoe insert device may allow for thicker materials for added comfort and cushioning. It is intended to grip the original shoe insole and allows for repositioning and removal without damaging or leaving residue on the surface to which it comes in contact with.
  • the shoe insert device is durable, requiring replacement from one to two times per month to once every three to six months. This promotes shoe and foot hygiene particularly for those who do not wear socks with their shoes.
  • the shoe insert product is intended to be manufactured and sold to the consumer in matched pairs fitted for the left and right curvatures of the feet and does not require trimming to size.
  • FIG. 1 is a top view of another embodiment of the present invention, where the shoe liner provides partial shoe length coverage.
  • FIG. 2 is a top view of a one embodiment of the present invention, where the shoe liner provides full shoe length coverage.
  • FIG. 3 is a cross-sectional view of a dual-layer shoe liner taken along line A-A in FIGS. 1 and 2.
  • FIG. 4 is a cross-sectional view of a tri-layer shoe liner taken along line A-A in FIGS. 1 and 2.
  • FIGS. 1 and 2 show two shapes of the proposed invention.
  • the shoe liner 10 in FIG. 1 provides forefoot coverage of the shoe, spanning from the mid-foot to the toes. This embodiment allows for a one-size fits all approach without trimming to fit and provides shoe and foot protection for the forefoot area, the main source of moisture within shoes.
  • shoe liner 20 shown in FIG. 2 represents a version that covers the entire shoe length of the shoe extending from the forefoot area 21 to the heel area 22. This embodiment would be used within boots or athletic shoes, where the top of the foot is fully enclosed by the shoe thereby trapping more moisture within the shoe.
  • Each representation, those shown in FIGS. 1 and 2 would be designed as a pair, with one piece shaped for the left foot curvature and one piece shaped for the right foot curvature.
  • the shoe liners 10 and 20 consist of a top material layer 31 and a bottom material layer 32 as shown by cross-section 30 in FIG. 3.
  • the top material layer comes into direct contact with the bare foot while being used and therefore should be durable as well as comfortable to the skin.
  • the preferred material for this top layer is a microdenier polyester textile identified as Traffic and available from Starensier Inc in Newburyport, MA.
  • the Traffic material has a thickness of 0.85mm and a Martindale Abrasion resistance (Satra PM31) of 100,000 revs under both dry and wet conditions.
  • Another suitable material is a polyester textile identified as ETC and available by Sheehan Associates in Topsfield, MA. ETC has a weight of 364 g/yd and thickness of 0.65mm.
  • the top layer 31 is treated with silver, a naturally occurring and highly effective antimicrobial agent.
  • the preferred method of incorporating silver into the top layer 31 is a topical application during the finishing stage of the manufacturing process.
  • Silver can also be incorporated directly into the fiber master batch during synthetic fiber formation for better washing durability in the final shoe insert product. Additionally, silver can be applied as a universal and permanent coating on the yarn or fabric substrates to achieve higher and faster microbe kill rates in the final shoe insert product.
  • One suitable agent is provided by Agion Technologies in Wakefield, MA. Agion antimicrobials operate at the surface of a product through the controlled release of silver ions which attack microbes and inhibit their growth.
  • SmartSilverTM Another silver-based additive, called SmartSilverTM, is offered by NanoHorizons Inc. in Bellefonte, PA. SmartSilver nanotechnology enables natural silver to produce more microbe fighting silver ions. SmartSilver nanoscale silver particles bind permanently so antimicrobial efficacy and odor elimination last for the product's expected life.
  • X-STATIC® has a layer of pure silver permanently bonded to the surface of a textile fiber. It can be used in knits, wovens and non-wovens as either a filament or spun yarn. X-STATIC® offers all of the benefits known to be inherent to pure silver, delivered in a textile fiber.
  • the top layer 31 may also be treated with other additives that create further softness or provide wicking, antimicrobial and/or anti-odor functionality.
  • the bottom material layer 32 comes into direct contact with the interior sole of the shoe and is intended to provide grip capabilities, allowing the shoe liner to remain in place within the shoe.
  • the bottom layer is not provided with adhesive as that often impacts on the ease of transfer of the insert from shoe to shoe and can damage the original shoe. Rather, the present device utilizes a non-slip bottom surface of the bottom layer and avoids using an adhesive.
  • the present shoe insert is easily re-positionable, transferable between shoes, does not damage the original shoe and, yet, the non-slip surface characteristic maintains the insert in relative desired position beneath the foot and within the shoe.
  • the non-slip characteristic of the bottom surface of the bottom layer may be provided by having its surface with raised undulating ridges, a series of raised nodes or some other type of textured pattern to provide additional traction for the insert within the shoe.
  • bottom layer 32 is less than 1mm, although other aspects of the invention may use thicker materials for added cushioning and comfort.
  • One suitable material for the bottom layer is a foamed polyvinyl chloride (PVC) over net substrate, identified as E916 with a weight of 210 g/m and available through Changle Efit
  • TPE thermoplastic elastomer
  • ROC thermoplastic elastomer
  • a third suitable material for the bottom layer 32 is a gel layer provided by PolyWorks Inc in Lincoln, RI. This gel material may provide some cushioning to the feet while also functioning to grip the shoe liner to the original shoe insole.
  • the bottom layer 32 may be treated with antimicrobial or deodorizing agents.
  • top material layer 31 and bottom non-slip material layer 32 are bonded together by means of adhesive lamination, flame lamination, pressure sensitive adhesive, heat sealing or stitching.
  • the edges of the shoe insert device as shown at either end of the cross- sectional view of line A-A in FIG. 3 and FIG. 4, may be heat pressed and sealed to further secure bonding between layers 31 and 32.
  • FIG. 4 Another embodiment of the shoe liner is shown by cross-section 40 in FIG. 4.
  • the shoe liner consists of a top material layer 31, a bottom material layer 32 and a middle layer 33 to provide stiffness or additional cushioning.
  • One suitable material for the middle layer 33 may be a PORON urethane offered by Rogers Corporation in Rogers, CT. PORON urethanes are high performance cushioning materials that provide impact absorption and moisture wicking benefits. While the drawings and description illustrate preferred embodiments of the present invention, it should be understood that further variations and embodiments may be made without departing from the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

A thin, extended wear shoe liner that is comprised of multiple layers. The top layer, which comes into contact with the bottom of the human foot, is made from a soft, durable material that is moisture absorbent and contains silver which has natural antimicrobial properties. The bottom layer, made up of a non-slip material, comes into direct contact with the top of the shoe insole and maintains positioning of the shoe liner within the shoe. The shoe liner serves to preserve the life of shoes by keeping the interior clean and odor- free. The shoe liner also creates a comfortable and dry environment for the feet. The continued usage and replacement of the shoe liner in addition to the presence of silver prevents bacterial growth and thus odor. Optional features include other antimicrobial agents, deodorizers and additional layers for stiffness or comfort.

Description

Extended Wear Shoe Liner with Silver BACKGROUND OF INVENTION
The present invention relates to a personal care item, primarily for men and women, but it can also be used by youngsters, too. The item is an insertable and selectively removable shoe insert which is intended to absorb moisture and odor.
Numerous shoe liners, inserts and insoles exist today with the primary objective of providing cushioning and/or support to the user. Most of these products are made of foams or plastics and designed to be long lasting. These insoles typically change the feel of the shoe while worn, due to the thickness of the products.
Other liners have been developed specifically for the absorption of sweat. Some of these products use agents such as activated charcoal or baking soda to eliminate odor, however, the effectiveness of such products diminishes over time and the shoes in which they are used begin to retain the wetness and odor.
There are also moisture absorbent liners that are disposable and low-cost. These liners do not destroy bacteria and odor. Instead, they require almost daily replacement to promote freshness and cleanliness creating an inconvenience to the user. Some are lined with an adhesive backing so that the liner can adhere to the original shoe insole. This type of liner often leaves behind a sticky residue or damages the original shoe insole upon removal. By not using an adhesive on the bottom of the present shoe line, but, however, still maintaining an anti-slip backing, the current device is re-positionable, transferable between shoes, and does not damage the original shoe.
Examples of prior shoe liners are given in the following US patents and applications:
Patent or Title Issue Date Inventors
Patent
Application #
7037571 Disposable shoe liner May 2, 2006 Fish , Jeffrey E.
Agarwal, Naveen
7047671 Disposable shoe insert May 23, 2006 Steed, Cheryl
Rodek, Maria
6675421 Regeneratively January 13, 2004 Hsu, Tsang-Hung dehumidifying and
deodorizing shoe insert
6210508 Anti-microbial shoe April 3, 2001 Williamson, Robert R.
lining, sock liner and Derby, Norwin C. process for manufacture Nickell, Craig Alan of same
4015347 Insoles effective for April 5, 1977 Morishita, Kazuyoshi curing and preventing Furukawa, Nobuhiko athlete's foot
5935671 Sole- shaped sweat- August 10, 1999 Lhuillier, Olivier absorbing disposable
hygienic insert
20090205222 Absorbent footwear liner April 29, 2009 McLinden, Shannon
Michelle
SUMMARY OF INVENTION
These needs may be met by the present shoe insert device, which is a thin and convenient, extended wear shoe liner that preserves the life of shoes by preventing interior wear and promotes a more comfortable and hygienic environment for the feet. The shoe liner is made up of a moisture absorbent, antimicrobial top layer and an anti-slip bottom layer. Silver, a naturally occurring and proven antimicrobial, is incorporated into the top and/or bottom layers to destroy bacteria and odor within the shoes.
The top layer, which comes into direct contact with the bottom of foot, functions to keep the foot and shoe interior dry and odor free. It is made of a fabric, a woven or non- woven textile, which serves to absorb and wick away moisture from the foot. The textile is highly durable while also being soft and comfortable to the skin. By absorbing excess moisture, the top layer provides better traction for and prevents slippage of the feet within the body of the shoe. The top layer has a preferred thickness of less than 1mm to minimize the thickness of the shoe insert device. In other aspects of the shoe insert device, the top layer may comprise a thicker material to provide for added comfort and cushioning. The top layer also has a good abrasion resistance under dry and wet conditions as determined by the Martindale, Taber or similar abrasion resistance tests. In one embodiment, the top layer is bonded to the bottom layer by heat sealing, stitching, flame lamination or adhesive lamination. The bottom layer has anti-slip capabilities and prevents movement of the shoe liner in relation to the shoe without the use of adhesives. The bottom layer also has a preferred thickness of less than 1mm to minimize the thickness of the shoe liner, however, other aspects of the shoe insert device may allow for thicker materials for added comfort and cushioning. It is intended to grip the original shoe insole and allows for repositioning and removal without damaging or leaving residue on the surface to which it comes in contact with. It may also have raised ridges, nodes or some other type of textured pattern to provide additional traction within the shoe. To maximize benefit and convenience for the user, the shoe insert device is durable, requiring replacement from one to two times per month to once every three to six months. This promotes shoe and foot hygiene particularly for those who do not wear socks with their shoes. The shoe insert product is intended to be manufactured and sold to the consumer in matched pairs fitted for the left and right curvatures of the feet and does not require trimming to size.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a top view of another embodiment of the present invention, where the shoe liner provides partial shoe length coverage.
FIG. 2 is a top view of a one embodiment of the present invention, where the shoe liner provides full shoe length coverage.
FIG. 3 is a cross-sectional view of a dual-layer shoe liner taken along line A-A in FIGS. 1 and 2.
FIG. 4 is a cross-sectional view of a tri-layer shoe liner taken along line A-A in FIGS. 1 and 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 1 and 2 show two shapes of the proposed invention. The shoe liner 10 in FIG. 1 provides forefoot coverage of the shoe, spanning from the mid-foot to the toes. This embodiment allows for a one-size fits all approach without trimming to fit and provides shoe and foot protection for the forefoot area, the main source of moisture within shoes. Another embodiment, shoe liner 20 shown in FIG. 2, represents a version that covers the entire shoe length of the shoe extending from the forefoot area 21 to the heel area 22. This embodiment would be used within boots or athletic shoes, where the top of the foot is fully enclosed by the shoe thereby trapping more moisture within the shoe. Each representation, those shown in FIGS. 1 and 2, would be designed as a pair, with one piece shaped for the left foot curvature and one piece shaped for the right foot curvature.
The shoe liners 10 and 20 consist of a top material layer 31 and a bottom material layer 32 as shown by cross-section 30 in FIG. 3. The top material layer comes into direct contact with the bare foot while being used and therefore should be durable as well as comfortable to the skin. The preferred material for this top layer is a microdenier polyester textile identified as Traffic and available from Starensier Inc in Newburyport, MA. The Traffic material has a thickness of 0.85mm and a Martindale Abrasion resistance (Satra PM31) of 100,000 revs under both dry and wet conditions. Another suitable material is a polyester textile identified as ETC and available by Sheehan Associates in Topsfield, MA. ETC has a weight of 364 g/yd and thickness of 0.65mm. It has a Martindale Abrasion resistance (Satra TM 31-97) of 51,000 revs under dry conditions and 12,800 revs under wet conditions. The top layer 31 is treated with silver, a naturally occurring and highly effective antimicrobial agent. The preferred method of incorporating silver into the top layer 31 is a topical application during the finishing stage of the manufacturing process. Silver can also be incorporated directly into the fiber master batch during synthetic fiber formation for better washing durability in the final shoe insert product. Additionally, silver can be applied as a universal and permanent coating on the yarn or fabric substrates to achieve higher and faster microbe kill rates in the final shoe insert product. One suitable agent is provided by Agion Technologies in Wakefield, MA. Agion antimicrobials operate at the surface of a product through the controlled release of silver ions which attack microbes and inhibit their growth.
Another silver-based additive, called SmartSilver™, is offered by NanoHorizons Inc. in Bellefonte, PA. SmartSilver nanotechnology enables natural silver to produce more microbe fighting silver ions. SmartSilver nanoscale silver particles bind permanently so antimicrobial efficacy and odor elimination last for the product's expected life.
Noble Biomaterials, headquartered in Scranton, PA, also offers a silver-based technology called X-STATIC®. X-STATIC® has a layer of pure silver permanently bonded to the surface of a textile fiber. It can be used in knits, wovens and non-wovens as either a filament or spun yarn. X-STATIC® offers all of the benefits known to be inherent to pure silver, delivered in a textile fiber. The top layer 31 may also be treated with other additives that create further softness or provide wicking, antimicrobial and/or anti-odor functionality.
The bottom material layer 32 comes into direct contact with the interior sole of the shoe and is intended to provide grip capabilities, allowing the shoe liner to remain in place within the shoe. The bottom layer is not provided with adhesive as that often impacts on the ease of transfer of the insert from shoe to shoe and can damage the original shoe. Rather, the present device utilizes a non-slip bottom surface of the bottom layer and avoids using an adhesive. Thus, the present shoe insert is easily re-positionable, transferable between shoes, does not damage the original shoe and, yet, the non-slip surface characteristic maintains the insert in relative desired position beneath the foot and within the shoe. The non-slip characteristic of the bottom surface of the bottom layer may be provided by having its surface with raised undulating ridges, a series of raised nodes or some other type of textured pattern to provide additional traction for the insert within the shoe.
The preferred thickness of bottom layer 32 is less than 1mm, although other aspects of the invention may use thicker materials for added cushioning and comfort. One suitable material for the bottom layer is a foamed polyvinyl chloride (PVC) over net substrate, identified as E916 with a weight of 210 g/m and available through Changle Efit
Houseware Co in Jinfeng Town in Changle, China. The material has an open weave pattern with perforations to allow for circulation of air and moisture, thereby promoting breathability. Another material that may be suitable for the bottom layer 32 is a thermoplastic elastomer (TPE). Microcell Composite Company in Rende Shiang, Taiwan (ROC) offers anti-skid TPE products that provide good grip to stop slipping and can be fixed securely without movement in dry and wet environments. Microcell TPE products are environmentally friendly and completely recyclable.
A third suitable material for the bottom layer 32 is a gel layer provided by PolyWorks Inc in Lincoln, RI. This gel material may provide some cushioning to the feet while also functioning to grip the shoe liner to the original shoe insole.
The bottom layer 32 may be treated with antimicrobial or deodorizing agents.
The top material layer 31 and bottom non-slip material layer 32 are bonded together by means of adhesive lamination, flame lamination, pressure sensitive adhesive, heat sealing or stitching. The edges of the shoe insert device, as shown at either end of the cross- sectional view of line A-A in FIG. 3 and FIG. 4, may be heat pressed and sealed to further secure bonding between layers 31 and 32.
Another embodiment of the shoe liner is shown by cross-section 40 in FIG. 4. The shoe liner consists of a top material layer 31, a bottom material layer 32 and a middle layer 33 to provide stiffness or additional cushioning. One suitable material for the middle layer 33 may be a PORON urethane offered by Rogers Corporation in Rogers, CT. PORON urethanes are high performance cushioning materials that provide impact absorption and moisture wicking benefits. While the drawings and description illustrate preferred embodiments of the present invention, it should be understood that further variations and embodiments may be made without departing from the scope of the present invention.

Claims

1. An insert for a shoe having an insole comprising a composite of a top layer and a bottom layer secured to said top layer wherein:
a) said top layer comprises a material which is both antimicrobial and moisture absorbent and
b) said bottom layer is provided with a bottom surface which is anti-slip for said insert when placed within the insole of a shoe when worn by a wearer.
2. An insert as claimed in claim 1 wherein the top layer and/or said bottom layer is treated with a form of silver for destroying bacteria and odor.
3. An insert as claimed in claim 1 wherein said top layer is also provided with wicking means to wick away moisture from a wearer' s foot within the shoe containing said insert.
4. An insert as claimed in claim 3 wherein said wicking means is a woven or non-woven fabric.
5. An insert as claimed in claim 1 wherein said top layer is in the range of less than about 1 mm in thickness.
6. An insert as claimed in claim 1 wherein said top layer and said bottom layer are bonded together by any one or more processes selected from: stitching, heat sealing, flame lamination, pressure sensitive adhesion, and/or adhesive lamination.
7. An insert as claimed in claim 1 wherein said bottom layer is in the range of less than about 1 mm in thickness.
8. An insert as claimed in claim 1 wherein the top layer and the bottom layer are integrated to be less than about 2 mm in overall composite thickness.
9. An insert as claimed in claim 1 wherein the bottom surface of said bottom layer is non-adhesive and provided with any one or more anti-slip means selected from: ridges, nodes or other textured pattern to provide traction to the insert upon the insole of the shoe.
10. An insert as claimed in claim 1 formed to correspond to at least the shape of the forward portion of the insole of a shoe.
11. An insert as claimed in claim 1 wherein the shape of the insert corresponds to the entire insole of a shoe.
12. An insert as claimed in claim 1 wherein the shape of the insert is only the forward portion of the insole of a shoe.
13. An insert as claimed in claim 10 curved for either the left or the right curvature of the human foot.
1
14. A pair of inserts as claimed in claim 10 wherein one insert is shaped for the left insole of a shoe and the other insert is shaped for the right insole of a shoe.
15. An insert as claimed in claim 1 wherein the top layer is comprised of polyester textile, treated with silver and said bottom layer is foamed polyvinyl chloride over a net substrate.
16. An insert as claimed in claim 1 wherein said top layer comprises microdenier polyester textile.
17. An insert as claimed in claim 16 wherein the thickness of the top layer is in the ran^ of about .85 mm.
18. An insert as claimed in claiml6 wherein the thickness of the top layer is in the rang of about .65 mm and the weight of the top layer is in the range of about 364 g/yd.
19. An insert as claimed in claim 2 wherein said silver is topically applied to said top layer during the finishing stage of manufacture.
20. An insert as claimed in claim 2 wherein said silver is incorporated directly into the fiber master batch during synthetic fiber formation of the top and/or bottom layer.
21. An insert as claimed in claim 2 wherein said silver is coated onto the yarn or fabric substrate used to manufacture the top layer and/or bottom layer.
22. An insert as claimed in claim 2 wherein said silver is selected from the group consisting of: silver ions, naturally occurring elemental silver, and nanoscale silver-based particles.
23. An insert as claimed in claim 1 wherein said top layer and/or said bottom layer are further treated with materials for increasing the softness, wicking, antimicrobial and/or anti-odor of said insert.
24. An insert as claimed in claim 1 wherein said bottom layer is foamed polyvinyl chloride over a net substrate.
25. An insert as claimed in claim 1 wherein said bottom layer is further provided with perforations.
26. An insert as claimed in claim 1 wherein said bottom layer is a thermoplastic elastomer.
27. An insert as claimed in claim 1 wherein said bottom layer is a gel layer.
28. An insert as claimed in claim 1 wherein the outer edges of said top layer and said bottom layer are heat pressed or sealed.
29. An insert as claimed in claim 1 further comprising a middle layer in between said top layer and said bottom layer.
30. An insert as claimed in claim 29 wherein said middle layer is formed from either a stiff and/or a cushioning material.
31. An insert as claimed in claim 30 wherein said middle layer is formed from urethane.
1
PCT/US2011/021843 2010-01-25 2011-01-20 Extended wear shoe liner with silver WO2011091127A2 (en)

Applications Claiming Priority (4)

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US29816310P 2010-01-25 2010-01-25
US61/298,163 2010-01-25
US98726611A 2011-01-10 2011-01-10
US12/987,266 2011-01-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104382278A (en) * 2014-12-04 2015-03-04 起步（中国）有限公司 Antibacterial deodorizing children's shoe lining
EP3005896A4 (en) * 2013-05-31 2016-06-29 Herrero Maria Pilar Mateo Footwear item comprising a biocidal product and method for incorporating said biocidal product
IT201600126625A1 (en) * 2016-12-16 2018-06-16 Spin Pet Srl Simple insoles for protecting the feet against bacteria, fungi and odors

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555975A1 (en) * 1992-01-31 1993-08-18 Ogden Inc. Improvements in and relating to footwear insoles
JP2001299409A (en) * 2000-04-18 2001-10-30 Dainippon Printing Co Ltd Insole of shoe
JP2002136303A (en) * 2000-11-01 2002-05-14 Shogo Iwai Sock
KR20080112899A (en) * 2007-06-22 2008-12-26 윤옥순 Bottom layer structure of shoes
EP2130448A1 (en) * 2007-03-12 2009-12-09 Noveko Trading 2008 LLC Multi-function health care self-cleaning shoe material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555975A1 (en) * 1992-01-31 1993-08-18 Ogden Inc. Improvements in and relating to footwear insoles
JP2001299409A (en) * 2000-04-18 2001-10-30 Dainippon Printing Co Ltd Insole of shoe
JP2002136303A (en) * 2000-11-01 2002-05-14 Shogo Iwai Sock
EP2130448A1 (en) * 2007-03-12 2009-12-09 Noveko Trading 2008 LLC Multi-function health care self-cleaning shoe material
KR20080112899A (en) * 2007-06-22 2008-12-26 윤옥순 Bottom layer structure of shoes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3005896A4 (en) * 2013-05-31 2016-06-29 Herrero Maria Pilar Mateo Footwear item comprising a biocidal product and method for incorporating said biocidal product
CN104382278A (en) * 2014-12-04 2015-03-04 起步（中国）有限公司 Antibacterial deodorizing children's shoe lining
IT201600126625A1 (en) * 2016-12-16 2018-06-16 Spin Pet Srl Simple insoles for protecting the feet against bacteria, fungi and odors

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