EP1006828A1 - Footwear sole construction - Google Patents
Footwear sole constructionInfo
- Publication number
- EP1006828A1 EP1006828A1 EP96922059A EP96922059A EP1006828A1 EP 1006828 A1 EP1006828 A1 EP 1006828A1 EP 96922059 A EP96922059 A EP 96922059A EP 96922059 A EP96922059 A EP 96922059A EP 1006828 A1 EP1006828 A1 EP 1006828A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- iayer
- reflective
- insulating
- construction
- sole construction
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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
- A43B17/14—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined made of sponge, rubber, or plastic materials
-
- 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
Definitions
- the present invention relates to a footwear sole construction as pre ⁇ sented in the preamble of the accompanying claim 1.
- air-containing porous plastic has been used as heat-insulating material, which plastic has poor thermal con ⁇ ductivity and which therefore serves as an insulator.
- the construction of the insulator is so dense that the convection, i.e., in this case the air flow through the insulator, is prevented.
- a material of this type is most commonly of foamed polyurethane, EVA (ethylene-vinylacetate) foam or latex foam.
- EVA ethylene-vinylacetate foam or latex foam.
- Another generally used solution is to "lighten" the some ⁇ what thick sole construction by shaping projections on the sole surface which is against the foot, between which projections there is left mate- rial and weight saving air pocket which, at the same time, is a heat- insulating construction.
- a reflective Iayer can have been glued on the surface of the insulating Iayer, which reflective Iayer is most commonly a thin metal film, e.g. a lustrous aluminium foil.
- a lustrous metal surface well reflects the heat radiation coming via the insulating Iayer and it should thus prevent heat loss by radiation.
- the reflective Iayer is attached to the insulating Iayer by gluing.
- the glue Iayer is thin (0.02 — 0.03 mm) and e.g. visually seen it is transparent, it can affect the heat-insulating prop ⁇ erties.
- Many materials used as a glue absorb well heat radiation in the wavelength area of 8 to 15 ⁇ m, and the quantity that is absorbed can well exceed even 80 %.
- the radiation reflecting back from the re ⁇ flecting surface of the reflective Iayer is absorbed when returning to the glue Iayer, so that over 95 % of the heat radiation can be absorbed even to a thin glue Iayer. The quantity of the heat radiation returning to the insulating Iayer can thus be very small.
- the problem is that the materials of the reflective Iayer also conduct well heat, wherein when the heat is transferred by conducting from the glue Iayer to the reflective Iayer, heat is transferred out exactly due to the good heat conductivity of the reflective Iayer, e.g. to the glue Iayer on the opposite side of the reflective Iayer.
- British Patent application GB-A-2137866 discloses a separate insole in which a surface which is facing the inner sole is made of polyester coated with a metal film, and between the outermost metal surface and the inner sole there is an additional intermediate Iayer, having a thick ⁇ ness of 1 mm, attached to the metal surface, perforated and made of polyethylene.
- the polyester Iayer (PET) on the side of the foot behaves in the same manner as the glue Iayer; it conducts well heat, and the openness of the intermediate Iayer facing the inner sole subjects the metal Iayer to mechanical damages and the heat is capable of transfer ⁇ ring partially by convection through holes, particularly in the case of a separate insole, which will move during the use.
- the object of the invention is to eliminate the above mentioned disad ⁇ vantages and to present a sole construction with improved heat insula ⁇ tion properties, the sole construction being most commonly an insole used between the inner lining and the wear sole.
- the sole construction is mainly characterized in what is presented in the characterizing portion of the accompanying claim 1.
- the reflective surface of the reflective Iayer is attached directly to the material of the insulating Iayer without an intermediate absorbent glue Iayer.
- the sig ⁇ nificance of this construction has until now remained undiscovered, but it can be proved that the advantage achieved by means of it is distinctly to be noticed in connection with insulating layers permeable to heat radiation.
- Fig. 1 illustrates a cross section of a conventional construction and phenomena taking place therein
- Fig. 2 illustrates a cross section of a construction in accordance with the invention and phenomena taking place therein
- Fig. 3 shows how the construction in accordance with the invention is located in the footwear
- Fig. 4 shows a second altemative of the sole construction.
- the reference numeral 1 refers generally to an insulating Iayer having the predominant task of preventing heat transfer from taking place by conduction.
- the insulating layers employed advantageously in the construction of the invention are discussed later.
- a glue Iayer 2 To this Iayer there is attached, by using a glue Iayer 2, a reflective Iayer 3 made of such material that its surface reflects more than 90 %, preferably more than 95 % of the heat radiation coming thereto in the wave-length area of 8 to 15 ⁇ m.
- Such materials include metals, and the most employed mate ⁇ rial is aluminium.
- the reflective Iayer 3 can be further attached to its other side to another construction by means of a glue Iayer 2.
- Fig. 2 illustrates a construction according to the invention, in which, as in Fig. 1 , the thickness of the layers has been exaggerated for the sake of clarity.
- the insulating Iayer 1 is generally of plastic material with good heat-radiation permeability but poor heat conductivity being char- acterized in the employed Iayer thickness by a heat-radiation perme ⁇ ability of 40 to 90 % taken as average in a wavelength area of 8 to 15 ⁇ m, particularly in the wavelength range between 9 and 10 ⁇ m, which corresponds to foot temperature.
- a material of this type is characterized by the fact that, particularly compared to an ordinary polyethylene-terephthalate (polyester) of the same thickness, it is in the employed Iayer thickness characterized by at least twice, preferably at least three times, higher heat-radiation permeability in the wavelength range of 9 to 10 ⁇ m.
- the material is advantageously of some expanded polyolefin having a cellular construction brought about by orientation.
- Most advantageously suitable are such films which have a thickness not exceeding 0.1 mm, and most commonly in an area between 0.025 and 0.06 mm and having a closed-cell cellular construction brought about by cavitation technique.
- One suitable film material is polypropylene, and applicable for this purpose is e.g.
- a reflective Iayer 4 is attached directly on the surface of the insulating Iayer 1 , wherein a re ⁇ flective surface 4a crucial to the heat-insulation has a direct contact with the material of the insulating Iayer 1. It is important that the inter ⁇ face is sharp so that the material having the above mentioned proper ⁇ ties of the insulating Iayer 1 changes at the interface Iayer to the material of the reflective Iayer 4 without an intermediate Iayer having distinctly different properties from those of the insulating Iayer.
- Non- glue attachment of this kind to the insulating Iayer can be obtained e.g.
- the heat radiation (arrow 6) is reflected almost entirely (arrow 7) from the reflective surface 4a, because there exists no heat-absorbing material between the insulating Iayer 1 and the re ⁇ flective Iayer 4, and only the portion (arrow 8) determined by the prop ⁇ erties of the material of the reflective Iayer 4 is absorbed and is trans ⁇ ferred away by conducting.
- the emission coefficient of a vacuum- evaporated aluminium film is 0.04 at temperature of 20°C, which corre ⁇ sponds to a reflectivity of 96 %.
- the thickness of the reflective Iayer 4 is most advantageously not more than 50 nm, which is a relatively thick Iayer in vacuum-evaporation technique, corresponding to a basis weight of 0.15 g/m 2 for aluminium.
- the insulating Iayer 1 is characterized by the fact that it is a film having a uniform macroscopic construction and covering the reflective Iayer 4, i.e., it is closed having no holes in the middle through which the heat could pass through the film by convection, the air operating as the medium, and through which the reflective Iayer would be subject to damages.
- the above mentioned layers constitute the minimum conditions for the invention to be functional.
- the insulating Iayer 1 is in the insole on the side of the inner lining and the reflective Iayer 4a faces consequently the inner linings.
- the insulating Iayer 1 is positioned in the insole on the side of the wear sole and the reflective surface 4a of the reflective Iayer faces conse- quently the wear sole.
- Fig. 2 shows at the same time a two- sided construction according to the invention which construction can be used for preventing the heat from transferring from both sides.
- the construction has a second insulating Iayer 1 and a reflective Iayer 4 attached directly thereon, the layers being situated in a mirror symmetrical manner in relation to the first layered construction in a manner that the reflective layers 4 are situated in the middle of the construction and their reflective surfaces 4a reflecting heat radiation are facing to the opposite directions towards their own insulating layers 1.
- These layered constructions comprising an insulating Iayer 1 and a reflective Iayer 4 can be attached together by attaching the reflective layers 4 at their free surfaces together, e.g. by means of an intermedi ⁇ ate glue Iayer 2, which has no disadvantageous effect in this position.
- Fig. 2 further shows how the insulating layers 1 are joined at their outer surfaces to the rest of the sole construction 5, e.g. to an ordinary insole material, and at this point a glue line also can be used for joining.
- the inner lining can serve as the Iayer 5 above, and beneath there can be the upper ⁇ most blank piece of the insole, having the size of the shoe sole.
- the two-layer construction includes the advantage that the inner thin reflective layers 4 are well protected and the outermost insulating layers 1 function as attachment surfaces with the other layers. Particularly in the insole, but also elsewhere in the shoe sole, the thin Iayer 4 is not subject to bending to the degree that it would be damaged.
- the insulating Iayer 1 can be used for separating the reflective Iayer 4a from such layers of the sole construction which have a distinctly poorer heat-radiation permeability than the insulating Iayer 1 or which are practically non-permeable to heat radiation.
- the above-mentioned two-sided protection can also be obtained by means of a construction having the reflective Iayer 4 attached on both sides of the insulating Iayer 1 in accordance with the invention, wherein on both sides of the insulating Iayer there is a reflective surface 4a di- rectly against it, which reflective surface is capable of receiving the heat radiation coming through the insulating Iayer 1 without intermediate absorbent material.
- the glue line is also in this situation elsewhere than between the reflecting surface and the insulating Iayer.
- the heat radiation in this construction is low as such, because the reflective Iayer 4 has a poor emissivity and it does not radiate much when warmed up.
- Fig. 3 shows a cross section of a footwear in which the sole construc ⁇ tion is situated.
- the construction is most advantageously a layered construction situated close to the interior of the footwear, in the exam ⁇ ple of Fig. 3 a fixed insole 11 , to which the vamp or upper 12 is attached by using methods generally known in footwear industry.
- An outsole to which the ready-made vamp part is connected by means of a soling method is denoted by reference numeral 13, and the filling which is left between the insole 11 and the outsole 3 is denoted by reference numeral 14.
- the entity constituted of one or several insulating layers 1 and reflective layers 4 is placed to a correct position in relation to the direction of the incoming heat radiation, preferably in the middle of the insole, wherein they are supported and protected by its layers.
- Fig. 4 shows yet another sole construction, i.e., a separate insole 15 or insert positioned on top of the inner sole (interior bottom) of the foot ⁇ wear.
- the layered construction composed of the insulating Iayer 1 and the reflective Iayer 2 most advantageously the two-sided construction of Fig. 2, is situated preferably in the middle, wherein on its other side there is a Iayer having the suitable properties and placed against the foot sole, and on the other side there is a Iayer placed against the inner sole.
- the effect of the glue Iayer on heat reflection was measured by means of a long-wave camera.
- the test included three samples, the order of the samples from the top to the bottom being:
- Sample 1 OPP-film — vacuum-evaporated aluminium Iayer — glue Iayer — OPP-film.
- the OPP-film is a biaxially oriented polypropylene film.
- the samples were placed side by side on a surface of room temperature (23°C).
- a vessel of warm water (36°C) was placed to serve as the heat source and on the other side a heat camera was placed by which the temperatures of the heat source and the sam- pie surfaces were measured.
- the surface of the sample 1 showed a temperature of 27°C and the surfaces of the samples 2 and 3 both showed a temperature of 25°C and the surface below showed a tem ⁇ perature of 23°C.
- the glue Iayer between the OPP-film and the aluminium surface prevented the heat- reflecting effect of the aluminium and the reflectivity showed the same value as the sample without the aluminium Iayer.
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Laminated Bodies (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI953293 | 1995-07-04 | ||
FI953293A FI98042C (en) | 1995-07-04 | 1995-07-04 | The sole structure of a footwear |
PCT/FI1996/000394 WO1997001972A1 (en) | 1995-07-04 | 1996-07-04 | Footwear sole construction |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1006828A1 true EP1006828A1 (en) | 2000-06-14 |
EP1006828B1 EP1006828B1 (en) | 2003-08-13 |
Family
ID=8543730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96922059A Expired - Lifetime EP1006828B1 (en) | 1995-07-04 | 1996-07-04 | Footwear sole construction |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1006828B1 (en) |
AT (1) | ATE246885T1 (en) |
AU (1) | AU6307096A (en) |
DE (1) | DE69629503D1 (en) |
DK (1) | DK1006828T3 (en) |
FI (1) | FI98042C (en) |
NO (1) | NO311824B1 (en) |
RU (1) | RU2169514C2 (en) |
WO (1) | WO1997001972A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2778099B1 (en) * | 1998-04-30 | 2000-10-06 | Dominique Mace | DEVICE FOR CORRECTING DISORDERS DUE TO IMBALANCES OF THE POSTURAL TONIC SYSTEM |
US20040018336A1 (en) | 2002-07-29 | 2004-01-29 | Brian Farnworth | Thermally insulating products for footwear and other apparel |
US10165822B2 (en) * | 2015-10-21 | 2019-01-01 | W. L. Gore & Associates, Inc. | Insulated footwear articles |
TWI766106B (en) | 2017-09-29 | 2022-06-01 | 荷蘭商耐克創新有限合夥公司 | Articles having structural color |
CN113631059A (en) * | 2019-03-27 | 2021-11-09 | 耐克创新有限合伙公司 | Structurally colored articles and methods for making and using same |
EP3969947A1 (en) | 2019-06-26 | 2022-03-23 | Nike Innovate C.V. | Structurally-colored articles and methods for making and using structurally-colored articles |
WO2021021562A1 (en) | 2019-07-26 | 2021-02-04 | Nike, Inc. | Structurally-colored articles and methods for making and using structurally-colored articles |
US11986042B2 (en) | 2019-10-21 | 2024-05-21 | Nike, Inc. | Structurally-colored articles and methods for making and using structurally-colored articles |
EP4107007B1 (en) | 2020-05-29 | 2023-08-30 | Nike Innovate C.V. | Structurally-colored articles and methods for making and using structurally-colored articles |
US11129444B1 (en) | 2020-08-07 | 2021-09-28 | Nike, Inc. | Footwear article having repurposed material with concealing layer |
US11241062B1 (en) | 2020-08-07 | 2022-02-08 | Nike, Inc. | Footwear article having repurposed material with structural-color concealing layer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4055699A (en) * | 1976-12-02 | 1977-10-25 | Scholl, Inc. | Cold insulating insole |
EP0042138A3 (en) * | 1980-06-17 | 1982-04-21 | Schering-Plough Corporation | Simplified cold insulating insole |
DE3441624A1 (en) * | 1984-11-14 | 1986-05-15 | Puma-Sportschuhfabriken Rudolf Dassler Kg, 8522 Herzogenaurach | SPORTSHOE |
US4658515A (en) * | 1985-02-05 | 1987-04-21 | Oatman Donald S | Heat insulating insert for footwear |
-
1995
- 1995-07-04 FI FI953293A patent/FI98042C/en not_active IP Right Cessation
-
1996
- 1996-07-04 RU RU98101633/12A patent/RU2169514C2/en not_active IP Right Cessation
- 1996-07-04 AT AT96922059T patent/ATE246885T1/en not_active IP Right Cessation
- 1996-07-04 WO PCT/FI1996/000394 patent/WO1997001972A1/en active IP Right Grant
- 1996-07-04 DK DK96922059T patent/DK1006828T3/en active
- 1996-07-04 DE DE69629503T patent/DE69629503D1/en not_active Expired - Lifetime
- 1996-07-04 EP EP96922059A patent/EP1006828B1/en not_active Expired - Lifetime
- 1996-07-04 AU AU63070/96A patent/AU6307096A/en not_active Abandoned
-
1997
- 1997-12-29 NO NO19976090A patent/NO311824B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9701972A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE246885T1 (en) | 2003-08-15 |
NO976090D0 (en) | 1997-12-29 |
NO311824B1 (en) | 2002-02-04 |
AU6307096A (en) | 1997-02-05 |
WO1997001972A1 (en) | 1997-01-23 |
NO976090L (en) | 1997-12-29 |
DE69629503D1 (en) | 2003-09-18 |
FI98042C (en) | 1997-04-10 |
RU2169514C2 (en) | 2001-06-27 |
FI98042B (en) | 1996-12-31 |
DK1006828T3 (en) | 2003-12-08 |
FI953293A0 (en) | 1995-07-04 |
EP1006828B1 (en) | 2003-08-13 |
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