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WO2005020735A1 - Self-modeling thermoregulating shoe arch-support - Google Patents

Self-modeling thermoregulating shoe arch-support Download PDF

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Publication number
WO2005020735A1
WO2005020735A1 PCT/IT2003/000520 IT0300520W WO2005020735A1 WO 2005020735 A1 WO2005020735 A1 WO 2005020735A1 IT 0300520 W IT0300520 W IT 0300520W WO 2005020735 A1 WO2005020735 A1 WO 2005020735A1
Authority
WO
WIPO (PCT)
Prior art keywords
arch
layer
shoe
support according
thermoregulating
Prior art date
Application number
PCT/IT2003/000520
Other languages
French (fr)
Inventor
Giovanni Romanelli
Original Assignee
Rosho Corporation S.R.L.
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 Rosho Corporation S.R.L. filed Critical Rosho Corporation S.R.L.
Priority to AU2003265146A priority Critical patent/AU2003265146A1/en
Priority to PCT/IT2003/000520 priority patent/WO2005020735A1/en
Publication of WO2005020735A1 publication Critical patent/WO2005020735A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/026—Composites, e.g. carbon fibre or aramid fibre; the sole, one or more sole layers or sole part being made of a composite
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • 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
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/28—Adapting the inner sole or the side of the upper of the shoe to the sole of the foot
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/34—Footwear with health or hygienic arrangements with protection against heat or cold
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • F28D20/023—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • This invention relates to a self-modelling, thermoregulating shoe arch-support.
  • the human foot can be considered as a kind of a continuously working shock-absorber, the purpose of which is to balance the forces that one exercises during her/his physical activities. Consequently, a correct way of walking is fundamental for a general well-being of the people.
  • a correct way of walking is fundamental for a general well-being of the people.
  • people Depending on how the people stay on their feet, and raise and lean their foot from and onto the ground, it influences people's spine and muscular system remarkably.
  • people adopt determined postures, that are often repeated and then become habitual. When people correctly stay on their feet and spread the load of the body evenly, through both feet and through both the fore portion and heel of each foot, it is less likely that wearying phenomena occur. Further, in this way, the shoe itself is more comfortable.
  • the arch-support is the basis on which the whole shoe is manufactured, it has to be taken into account from the constructive point of view as well as from the functional point of view, in order to avoid any difficulty in assembling a shoe and overcome drawbacks in using it. It is plausible to think that the arch-support is for the shoe what a frame is for a car. For this reason the reliability of the arch-support must be assured.
  • the arch-support has been manufactured from various materials, such as leather, regenerated leather, synthetic fibre or vegetable fibre.
  • the vegetable fibre arch-support was brought in new custom in USA in the middle of the last century, first with great distrust, but it was appreciated as the most suitable very soon.
  • This arch-support is formed of cellulose fibres, which are selected on the grounds of length and strength thereof.
  • the most long fibres in effect a nonwoven fabric, create a strong framework, which stiffens all the structure and assures a high tear resistance.
  • Medium length fibres link together framework threads increasing the flexibility thereof, and short fibres bind the structure and provide closeness and porosity of the arch-support to be made.
  • the bond among the fibres is as strong as possible, it doesn't allow a base made of vegetable fibres to be used for arch-supports that need high cohesive forces, as it acts as an anchor of a firm shoe upper. This problem has been overcome by impregnating the fibres by a resin, which, after drying, finally weld the fibres one to another enhancing the toughness of the bond thereof.
  • This invention starts from the observation that the use of nano-structured fillers having a very high surface activity connected to particular, preferably micro-porous, matrix features, in the form of foams and nonwoven fabrics, enhances mechanical properties of stiffness, toughness and strength of a multiphase material.
  • the addition of the nano-structured fillers to the matrix allows the multiphase material to be adjusted in its viscoelastic characteristic, as the nano-structured fillers are able to affect also the dissipation component of the mechanical properties.
  • phase-change particles which can be added to a matrix in order to permit a heat absorption, when the phase-change is a fusion or melting, and a heat emission when the phase-change is a solidification,
  • the phase-change particles allow endothermic and exothermic flows.
  • an object of the present invention is to manufacture an arch-support which allows the body temperature in the interested zone to be suitably adjusted.
  • Another object of the invention is to manufacture an arch-support having viscoelastic properties that are able to assure a high comfort above all in the specific field of style shoes.
  • the invention relies upon a combined use of so called morphous-active materials, i.e. polymeric foams with nano- structured fillers having a settable viscoelasticity, and of thermo-active materials obtained by adding micro-particles of phase-change materials to a matrix, i.e. a foam or a nonwoven fabric.
  • morphous-active materials i.e. polymeric foams with nano- structured fillers having a settable viscoelasticity
  • thermo-active materials obtained by adding micro-particles of phase-change materials to a matrix, i.e. a foam or a nonwoven fabric.
  • a phase change relates to the metamorphosis of a material from one phase to another with energy absorption or release.
  • Additives are selected such to be active in specific temperature ranges that identify the application type thereof.
  • the invention provides a self-modelling, thermoregulating shoe arch- support designed to be positioned between a human foot and a sole of a shoe, characterized in that the arch-support is made of a multi-layer laminated material including a thermoregulating layer composed of a first matrix having a filler of phase change particles, and a viscoelastic layer composed of a second matrix and nano- structured particles modifying the elasticity, both the layers being provided at least in the fore portion of the shoe, and a structural layer of a resin-impregnated nonwoven fabric being provided at least in the heel of the shoe.
  • Figure 1 shows a schematic longitudinal section view of a lady's shoe with heel
  • Figure 2 shows a schematic perspective view of an arch-support of the shoe in Figure
  • Figure 3 shows a schematic first embodiment of the invention from a two-layer laminated material for the arch-support of Figure 2;
  • Figure 4 shows a schematic second embodiment of the invention from a two-layer laminated material for the arch-support of Figure 2;
  • Figure 5 shows a schematic third embodiment of the invention from a three-layer laminated material for the arch-support of Figure 2;
  • Figure 6 shows a schematic fourth embodiment of the invention from a three-layer laminated material for the arch-support of Figure 2; and Figure 7 shows a schematic perspective view of an arch-support of the shoe in Figure
  • FIG. 1 a schematic longitudinal section view of a lady's shoe with heel is shown, to which an arch-support 10 according to the invention is applied.
  • Figure 2 an arch-support 10 made of a laminated material or laminate according to the invention is schematically depicted.
  • the layers are denoted as 1, 2, and 3 respectively.
  • the layer 1 is thermoregulator. It is composed of an open-cell foam matrix and/or a resin-impregnated nonwoven fabric which is added with phase-change particles.
  • the layer 2 is viscoelastic. It is an open-cell foam matrix and/or a resin-impregnated nonwoven fabric which is added with nano-structured particles modifying the viscoelasticity.
  • the layer 3 is a structurally resistant layer of a resin-impregnated nonwoven fabric, made of a conventional material for arch-support.
  • the open-cell foam matrix can be constituted by polyurethan resins and/or rubber latices, and the resin-impregnated nonwoven fabric can be constituted by vegetable fibres.
  • phase-change fibres which can be used in the thermoregulating layer 1, have preferably a size from 20 to 100 micron. They have a range of melting/crystallization temperature from 5 to 35 Celsius degrees and a latent heat of melting/crystallization of 150 to 250 J/g.
  • the solid-liquid phase change of these particles determines a heat absorption in the melting and a heat release in the solidification (crystallization).
  • An overheating of the layer 1 provokes a raising in temperature and a melting of the phase change particles with connected heat absorption and reduction of the final range of temperature.
  • the crystallization of the latter generates a heat inflow which reduces the final range of temperature of the layer 1.
  • the overall effect of this kind of layer is an active thermoregulation and a reduction of the range of temperature in case of either overheating or overcooling.
  • the percentage of filler of phase-change particles varies from 5 to 40 per cent by weight.
  • the thermoregulating capacity of the layer 1 depends on the content and type of phase-change thermo-active particles.
  • the particles are continually dispersed in the polymeric foam and/or in resin- impregnated nonwoven fabric.
  • the viscoelastic layer 2 is composed of a solid, open-cell, polymeric foam matrix and nano-structured particles and/or a resin-impregnated nonwoven fabric containing nanometric particles of amorphous silica and/or titania and/or alumina.
  • the percentage of filler of nano-structured particles varies from 5 to 30 per cent by weight.
  • the additives modifying the viscoelasticity, adapted to modify also the hygroscopicity of the layer have preferably a size of 10 to 60 nanometer and a specific surface of 200 to 400 m 2 /g of additive.
  • the nano-structured particles are continually dispersed in the polymeric foam and/or in resin-impregnated nonwoven fabric.
  • the nano-structured particles having a very high specific surface (from 200 to 380 m 2 /g of additive) and a surface activity (according to the function of the type of selected additive), modify the viscoelasticity of the layer 2 improving the characteristics of hardness and elastic recovery of the material.
  • the capability of elastic recovery of the system depends on the percentage of filler and on the type of nano-structured agent modifying selected.
  • the high specific surface of the nano-structured particles and the ability of absorbing water of the layer 2 allow the same layer 2 to act as an absorber of the moisture in excess, besides as a damper of stresses by the walk,.
  • the structurally resistant layer 3 is composed of a solid matrix of resin-impregnated nonwoven fabric, which is the conventional structure of an arch-support.
  • the two-layer laminate in Figures 3 and 4 doesn't have structural features and is used in the fore contact areas between the foot and the sole.
  • This two-layer laminate has a total thickness from 1 mm to 5 mm, and the thickness of each layer is between 0.5 and 4.5 mm. With respect to its hygro-thermal properties, this laminate has an ability of moisture absorption from 2 to 5 times its weight, and a thermoregulating capability with a temperature range from 0.5 to 3 Celsius degrees in use. With reference to the laminated material in Figure 3, the thermoregulating layer contacts the foot sole.
  • the viscoelastic layer acts as a higrothermal insulating material to outside, besides as a damper of the stresses of the walking.
  • This arrangement is useful in cold weather, as it reduces the range of temperature of the foot (in walking) with low external temperatures ( ⁇ 15 Celsius degrees). Further, this arrangement keep constant the moisture of the foot, because the moisture in excess both from outside and from the foot is absorbed by the laminate. Thus, it is called “winter" arrangement.
  • the structure having open cells and/or interconnected cells of the thermoregolating layer 1 and of the viscoelastic layer 2 permits the transpiration of the same structure and the absorbing function of the viscoelastic layer 2.
  • the viscoelastic layer 2 that is in contact with the foot sole, and the thermoregulating layer is in contact with the shoe sole.
  • thermoregulating layer 1 a viscoelastic/hygroscopic layer 2
  • structurally resistant layer 3 This ternary laminate lias features similar to the equivalent two-layer laminate previously explained. In this laminate there is a structurally resistant layer.
  • the three-layer laminate can either be limited to the heel zone or cover the whole sole.
  • the three-layer laminate in Figure 5 is useful for cold weather
  • the three-layer laminate in Figure 6 is useful for hot weather.
  • FIG. 7 An arch-support 11 is shown in Figure 7, in which the fore portion 4 is different from the rear portion 5, as it is only structural.
  • the laminate of the fore portion of the arch-support has two layers, i.e. a the ⁇ noregulating layer and a viscoelastic-hygroscopic layer.
  • the total thickness of the laminate is 5 mm.
  • the thermoregulating layer is 3 mm thick, with a filler of 30 per cent phase-change particles having a melting temperature of 18 Celsius degrees and melting latent heat of 173 J/g.
  • the viscoelastic-hygroscopic layer is 2 mm thick, with filler of 15 per cent amorphous silica.
  • the laminate of the fore portion of the arch-support has two layers, i.e. a viscoelastic-hygroscopic layer and a thermoregulating layer.
  • the total thickness of the laminate is 5 mm.
  • the thermoregulating layer is 2 mm thick, with a filler of 40 per cent phase-change particles having a melting temperature of 35 Celsius degrees and melting latent heat of 180 J/g.
  • the viscoelastic-hygroscopic layer is 3 mm thick, with filler of 20 per cent amorphous silica.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Health & Medical Sciences (AREA)
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  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

A self-modelling thermoregulating shoe arch-support (10) designed to be positioned between a human foot and a sole of a shoe is made of a multi-layer laminated material including a thermoregulating layer (1) composed of a first matrix having a filler of phase change particles, and a viscoelastic layer (2) composed of a second matrix and nano-structured particles modifying the elasticity, both the layers being provided at least in the fore portion (4) of the shoe, and a structural layer (3) of a resin-impregnated nonwoven fabric being provided at least in the heel (5) of the shoe.

Description

Description
SELF-MODELLING, THERMOREGULATING SHOE ARCH-SUPPORT
Technical Field This invention relates to a self-modelling, thermoregulating shoe arch-support.
Background of the invention
From a functional point of view, the human foot can be considered as a kind of a continuously working shock-absorber, the purpose of which is to balance the forces that one exercises during her/his physical activities. Consequently, a correct way of walking is fundamental for a general well-being of the people. Depending on how the people stay on their feet, and raise and lean their foot from and onto the ground, it influences people's spine and muscular system remarkably. As a result, people adopt determined postures, that are often repeated and then become habitual. When people correctly stay on their feet and spread the load of the body evenly, through both feet and through both the fore portion and heel of each foot, it is less likely that wearying phenomena occur. Further, in this way, the shoe itself is more comfortable.
On the lower surface of the arch-support a sole is applied as usually, and the upper surface of the arch-support is lined or covered by other material.
As the arch-support is the basis on which the whole shoe is manufactured, it has to be taken into account from the constructive point of view as well as from the functional point of view, in order to avoid any difficulty in assembling a shoe and overcome drawbacks in using it. It is plausible to think that the arch-support is for the shoe what a frame is for a car. For this reason the reliability of the arch-support must be assured.
In the past the arch-support has been manufactured from various materials, such as leather, regenerated leather, synthetic fibre or vegetable fibre.
The vegetable fibre arch-support was brought in new custom in USA in the middle of the last century, first with great distrust, but it was appreciated as the most suitable very soon. This arch-support is formed of cellulose fibres, which are selected on the grounds of length and strength thereof. The most long fibres, in effect a nonwoven fabric, create a strong framework, which stiffens all the structure and assures a high tear resistance. Medium length fibres link together framework threads increasing the flexibility thereof, and short fibres bind the structure and provide closeness and porosity of the arch-support to be made. However, although the bond among the fibres is as strong as possible, it doesn't allow a base made of vegetable fibres to be used for arch-supports that need high cohesive forces, as it acts as an anchor of a firm shoe upper. This problem has been overcome by impregnating the fibres by a resin, which, after drying, finally weld the fibres one to another enhancing the toughness of the bond thereof.
However, nowadays performances are required that a vegetable fibre arch-support cannot offer.
This invention starts from the observation that the use of nano-structured fillers having a very high surface activity connected to particular, preferably micro-porous, matrix features, in the form of foams and nonwoven fabrics, enhances mechanical properties of stiffness, toughness and strength of a multiphase material. On the other hand, the addition of the nano-structured fillers to the matrix allows the multiphase material to be adjusted in its viscoelastic characteristic, as the nano-structured fillers are able to affect also the dissipation component of the mechanical properties. Further, there are phase-change particles which can be added to a matrix in order to permit a heat absorption, when the phase-change is a fusion or melting, and a heat emission when the phase-change is a solidification, In other words, the phase-change particles allow endothermic and exothermic flows. These heat flows, when connected to the thermal capacity and thermal conductivity of the material, develop an effect of thermal stabilizer, which permits that the temperature of a body with which said material is in contact is kept constant.
Therefore, an object of the present invention is to manufacture an arch-support which allows the body temperature in the interested zone to be suitably adjusted.
Another object of the invention is to manufacture an arch-support having viscoelastic properties that are able to assure a high comfort above all in the specific field of style shoes.
In order to achieve the objects above mentioned the invention relies upon a combined use of so called morphous-active materials, i.e. polymeric foams with nano- structured fillers having a settable viscoelasticity, and of thermo-active materials obtained by adding micro-particles of phase-change materials to a matrix, i.e. a foam or a nonwoven fabric.
A phase change relates to the metamorphosis of a material from one phase to another with energy absorption or release. Additives are selected such to be active in specific temperature ranges that identify the application type thereof.
Disclosure of the invention
Therefore, the invention provides a self-modelling, thermoregulating shoe arch- support designed to be positioned between a human foot and a sole of a shoe, characterized in that the arch-support is made of a multi-layer laminated material including a thermoregulating layer composed of a first matrix having a filler of phase change particles, and a viscoelastic layer composed of a second matrix and nano- structured particles modifying the elasticity, both the layers being provided at least in the fore portion of the shoe, and a structural layer of a resin-impregnated nonwoven fabric being provided at least in the heel of the shoe.
Brief description of the drawings
The present invention will be described with reference to preferred embodiments thereof in connection with the enclosed drawing, in which:
Figure 1 shows a schematic longitudinal section view of a lady's shoe with heel; Figure 2 shows a schematic perspective view of an arch-support of the shoe in Figure
1 in which the invention is embodied;
Figure 3 shows a schematic first embodiment of the invention from a two-layer laminated material for the arch-support of Figure 2;
Figure 4 shows a schematic second embodiment of the invention from a two-layer laminated material for the arch-support of Figure 2;
Figure 5 shows a schematic third embodiment of the invention from a three-layer laminated material for the arch-support of Figure 2;
Figure 6 shows a schematic fourth embodiment of the invention from a three-layer laminated material for the arch-support of Figure 2; and Figure 7 shows a schematic perspective view of an arch-support of the shoe in Figure
1, having a fore portion different from the rear heel portion.
Detailed description of the preferred embodiments
With reference to the drawing, in Figure 1 a schematic longitudinal section view of a lady's shoe with heel is shown, to which an arch-support 10 according to the invention is applied. In Figure 2 an arch-support 10 made of a laminated material or laminate according to the invention is schematically depicted.
With reference to Figures 3 to 6, there are indicated various layers of the laminated material of the arch-support 10. The layers are denoted as 1, 2, and 3 respectively. The layer 1 is thermoregulator. It is composed of an open-cell foam matrix and/or a resin-impregnated nonwoven fabric which is added with phase-change particles. The layer 2 is viscoelastic. It is an open-cell foam matrix and/or a resin-impregnated nonwoven fabric which is added with nano-structured particles modifying the viscoelasticity. The layer 3 is a structurally resistant layer of a resin-impregnated nonwoven fabric, made of a conventional material for arch-support.
The open-cell foam matrix can be constituted by polyurethan resins and/or rubber latices, and the resin-impregnated nonwoven fabric can be constituted by vegetable fibres.
The phase-change fibres, which can be used in the thermoregulating layer 1, have preferably a size from 20 to 100 micron. They have a range of melting/crystallization temperature from 5 to 35 Celsius degrees and a latent heat of melting/crystallization of 150 to 250 J/g.
The solid-liquid phase change of these particles determines a heat absorption in the melting and a heat release in the solidification (crystallization). An overheating of the layer 1 provokes a raising in temperature and a melting of the phase change particles with connected heat absorption and reduction of the final range of temperature. In case of cooling with reduction in temperature below the temperature of phase change of the particles, the crystallization of the latter generates a heat inflow which reduces the final range of temperature of the layer 1. The overall effect of this kind of layer is an active thermoregulation and a reduction of the range of temperature in case of either overheating or overcooling. In the thermoregulating layer 1 the percentage of filler of phase-change particles varies from 5 to 40 per cent by weight. The thermoregulating capacity of the layer 1 depends on the content and type of phase-change thermo-active particles. The particles are continually dispersed in the polymeric foam and/or in resin- impregnated nonwoven fabric.
The viscoelastic layer 2 is composed of a solid, open-cell, polymeric foam matrix and nano-structured particles and/or a resin-impregnated nonwoven fabric containing nanometric particles of amorphous silica and/or titania and/or alumina. In the viscoelastic layer 2 the percentage of filler of nano-structured particles varies from 5 to 30 per cent by weight. The additives modifying the viscoelasticity, adapted to modify also the hygroscopicity of the layer, have preferably a size of 10 to 60 nanometer and a specific surface of 200 to 400 m2/g of additive. The nano-structured particles are continually dispersed in the polymeric foam and/or in resin-impregnated nonwoven fabric. The nano-structured particles, having a very high specific surface (from 200 to 380 m2/g of additive) and a surface activity (according to the function of the type of selected additive), modify the viscoelasticity of the layer 2 improving the characteristics of hardness and elastic recovery of the material. The capability of elastic recovery of the system depends on the percentage of filler and on the type of nano-structured agent modifying selected.
The high specific surface of the nano-structured particles and the ability of absorbing water of the layer 2 allow the same layer 2 to act as an absorber of the moisture in excess, besides as a damper of stresses by the walk,. The structurally resistant layer 3 is composed of a solid matrix of resin-impregnated nonwoven fabric, which is the conventional structure of an arch-support.
Possible arrangements of the layers above explained in an arch-support according to the present invention are illustrated in Figures 3 to 6. The two-layer laminate in Figures 3 and 4 doesn't have structural features and is used in the fore contact areas between the foot and the sole. This two-layer laminate has a total thickness from 1 mm to 5 mm, and the thickness of each layer is between 0.5 and 4.5 mm. With respect to its hygro-thermal properties, this laminate has an ability of moisture absorption from 2 to 5 times its weight, and a thermoregulating capability with a temperature range from 0.5 to 3 Celsius degrees in use. With reference to the laminated material in Figure 3, the thermoregulating layer contacts the foot sole. The viscoelastic layer acts as a higrothermal insulating material to outside, besides as a damper of the stresses of the walking. This arrangement is useful in cold weather, as it reduces the range of temperature of the foot (in walking) with low external temperatures (<15 Celsius degrees). Further, this arrangement keep constant the moisture of the foot, because the moisture in excess both from outside and from the foot is absorbed by the laminate. Thus, it is called "winter" arrangement. The structure having open cells and/or interconnected cells of the thermoregolating layer 1 and of the viscoelastic layer 2 permits the transpiration of the same structure and the absorbing function of the viscoelastic layer 2.
With reference to the laminate in Figure 4, it is the viscoelastic layer 2 that is in contact with the foot sole, and the thermoregulating layer is in contact with the shoe sole.
This is a "summer" arrangement as it reduces the range of temperature of the foot (in walking) with high external temperatures (>25 Celsius degrees). Further, this arrangement keeps constant the moisture of the foot, because the moisture in excess from the foot is absorbed by the laminate through its hygroscopic component. The structure having open cells and/or interconnected cells of the thermoregulating layer 1 and of the viscoelastic layer 2 permits the transpiration of the same structure and the absorbing function of the viscoelastic/hygroscopic layer 2. The three-layer laminate in Figures 5 and 6 has a thermoregulating layer 1, a viscoelastic/hygroscopic layer 2, and a structurally resistant layer 3. This ternary laminate lias features similar to the equivalent two-layer laminate previously explained. In this laminate there is a structurally resistant layer. The three-layer laminate can either be limited to the heel zone or cover the whole sole.
Analogously to the laminates in Figures 3 and 4, the three-layer laminate in Figure 5 is useful for cold weather, and the three-layer laminate in Figure 6 is useful for hot weather.
An arch-support 11 is shown in Figure 7, in which the fore portion 4 is different from the rear portion 5, as it is only structural. Example of a "winter" arch-support
The laminate of the fore portion of the arch-support has two layers, i.e. a theπnoregulating layer and a viscoelastic-hygroscopic layer. The total thickness of the laminate is 5 mm. The thermoregulating layer is 3 mm thick, with a filler of 30 per cent phase-change particles having a melting temperature of 18 Celsius degrees and melting latent heat of 173 J/g. The viscoelastic-hygroscopic layer is 2 mm thick, with filler of 15 per cent amorphous silica.
The thermoregulating effect is +3 Celsius degrees with respect to a reference situation (20 minutes, external T = 5 Celsius degrees, rh = 50 per cent). Example of a "summer" arch-support
The laminate of the fore portion of the arch-support has two layers, i.e. a viscoelastic-hygroscopic layer and a thermoregulating layer. The total thickness of the laminate is 5 mm. The thermoregulating layer is 2 mm thick, with a filler of 40 per cent phase-change particles having a melting temperature of 35 Celsius degrees and melting latent heat of 180 J/g. The viscoelastic-hygroscopic layer is 3 mm thick, with filler of 20 per cent amorphous silica. The thermoregulating effect is -2 Celsius degrees with respect to a reference situation (20 minutes, external T = 30 Celsius degrees, rh = 70 per cent).

Claims

CLAIMS 1. A self-modelling, thermoregulating shoe arch-support designed to be positioned between a human foot and a sole of a shoe, characterized in that the arch-support is made of a multi-layer laminated material including a thermoregulating layer composed of a first matrix having a filler of phase change particles, and a viscoelastic layer composed of a second matrix and nano-structured particles modifying the elasticity, both the layers being provided at least in the fore portion of the shoe, and a structural layer of a resin-impregnated nonwoven fabric being provided at least in the heel of the shoe.
2. The arch-support according to claim 1, characterized in that both said first and second matrix is comprised of at least a substance from a group of substances in which open-cell polimeric foam and resin-impregnated nonwoven fabric are present.
3. The arch-support according to claim 1, characterized in that the range of melting/crystallization temperatures in this thermoregulating layer is from 5 to 35 Celsius degrees.
4. The arch-support according to claim 3, characterized in that the change-phase particles is between 5 and 40 per cent by weight.
5. The arch-support according to claim 3, characterized in that the size of the change- phase particles is between 20 and 100 micron.
6. The arch-support according to claim 1, characterized in that said nano-structured particles in said viscoelastic layer are those of at least a substance from a group constituted by amorphous silica, titania and alumina.
7. The arch-support according to claim 6, characterized in that the size of the nano- structured particles is between 10 and 60 nanometer.
8. The arch-support according to claim 6, characterized in that the nanostructured particles are spread on a specific surface from 200 to 400 m2/g.
9. The arch-support according to claim 1, characterized in that said theπnoregulating layer is immediately under the sole of a foot of a person wearing the shoe.
10. The arch-support according to claim 1, characterized in that said viscoelastic layer is immediately under the sole of a foot of a person wearing the shoe.
11. The arch-support according to claim 1, characterized in that said structural layer is immediately in contact with the sole of the shoe.
12. The arch-support according to claim 1, characterized in that said the thermoregulating layer and the viscoelastic layer have a total thickness between 1 mm and 5 mm.
13. The arch-support according to claim 12, characterized in that the thickness of each of said thermoregulating layer and viscoelastic layer is between 0.5 and 4.5 mm.
PCT/IT2003/000520 2003-08-27 2003-08-27 Self-modeling thermoregulating shoe arch-support WO2005020735A1 (en)

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PCT/IT2003/000520 WO2005020735A1 (en) 2003-08-27 2003-08-27 Self-modeling thermoregulating shoe arch-support

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Cited By (7)

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WO2006072417A1 (en) * 2004-12-30 2006-07-13 Michael Polus Damping material, method for the production thereof, and device for damping mechanical movements
WO2010003789A1 (en) * 2008-07-09 2010-01-14 Evonik Degussa Gmbh Sweat-absorbing shoe sole inserts having improved sweat absorption
EP2147608A1 (en) * 2008-07-24 2010-01-27 Smart Fiber AG Shoe insole
WO2013027105A1 (en) * 2011-08-19 2013-02-28 Flawa Ag Ultra-thin shoe insert with active temperature compensation
KR200472776Y1 (en) 2012-08-31 2014-05-22 주식회사 금강 Foot bed having a insulating material for a shoe
WO2016135601A1 (en) * 2015-02-24 2016-09-01 Miriade S.P.A. A shoe with improved thermal comfort
US10329700B2 (en) 2013-10-30 2019-06-25 3M Innovative Properties Company Method for producing a fluffy temperature regulating warmth retention material and fluffy temperature regulating warmth retention material

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US4894931A (en) * 1986-08-19 1990-01-23 Salomon S. A. Heating device
US5290904A (en) * 1991-07-31 1994-03-01 Triangle Research And Development Corporation Heat shield
US5985383A (en) * 1995-03-15 1999-11-16 Acushnet Company Conforming shoe construction and gel compositions therefor
DE19750540A1 (en) * 1997-11-14 1999-05-20 Ahlers Horst Doz Dr Ing Habil Heated floor covering

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006072417A1 (en) * 2004-12-30 2006-07-13 Michael Polus Damping material, method for the production thereof, and device for damping mechanical movements
WO2010003789A1 (en) * 2008-07-09 2010-01-14 Evonik Degussa Gmbh Sweat-absorbing shoe sole inserts having improved sweat absorption
EP2147608A1 (en) * 2008-07-24 2010-01-27 Smart Fiber AG Shoe insole
WO2013027105A1 (en) * 2011-08-19 2013-02-28 Flawa Ag Ultra-thin shoe insert with active temperature compensation
AT13332U1 (en) * 2011-08-19 2013-10-15 Flawa Ag sole
KR200472776Y1 (en) 2012-08-31 2014-05-22 주식회사 금강 Foot bed having a insulating material for a shoe
US10329700B2 (en) 2013-10-30 2019-06-25 3M Innovative Properties Company Method for producing a fluffy temperature regulating warmth retention material and fluffy temperature regulating warmth retention material
WO2016135601A1 (en) * 2015-02-24 2016-09-01 Miriade S.P.A. A shoe with improved thermal comfort
CN107404968A (en) * 2015-02-24 2017-11-28 米利亚德股份公司 Thermal comfort is able to improved footwear
US20180027921A1 (en) * 2015-02-24 2018-02-01 Miriade S.P.A. A shoe with improved thermal comfort
RU2700761C2 (en) * 2015-02-24 2019-09-19 Мирьяде С.П.А. Shoes with improved thermal comfort

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