EP0880327B1 - Element de renfort thermoactivable pour articles chaussants et article chaussant comportant un tel element de renfort - Google Patents
Element de renfort thermoactivable pour articles chaussants et article chaussant comportant un tel element de renfort Download PDFInfo
- Publication number
- EP0880327B1 EP0880327B1 EP97905205A EP97905205A EP0880327B1 EP 0880327 B1 EP0880327 B1 EP 0880327B1 EP 97905205 A EP97905205 A EP 97905205A EP 97905205 A EP97905205 A EP 97905205A EP 0880327 B1 EP0880327 B1 EP 0880327B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- footwear
- reinforcing
- fabric
- heat
- article
- 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.)
- Expired - Lifetime
Links
- 230000003014 reinforcing effect Effects 0.000 title claims description 45
- 239000004744 fabric Substances 0.000 claims description 41
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 2
- 230000000536 complexating effect Effects 0.000 claims description 2
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 claims description 2
- 241000531908 Aramides Species 0.000 claims 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 claims 1
- 239000012815 thermoplastic material Substances 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 description 26
- 239000010410 layer Substances 0.000 description 16
- 239000000835 fiber Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 239000002131 composite material Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 210000001519 tissue Anatomy 0.000 description 5
- 229920002994 synthetic fiber Polymers 0.000 description 4
- 229920006231 aramid fiber Polymers 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 206010052904 Musculoskeletal stiffness Diseases 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 210000002683 foot Anatomy 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 229920003182 Surlyn® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 125000000007 metacrylic acid group Chemical group 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 229920000431 shape-memory polymer Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/08—Heel stiffeners; Toe stiffeners
- A43B23/16—Heel stiffeners; Toe stiffeners made of impregnated fabrics, plastics or the like
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/08—Heel stiffeners; Toe stiffeners
- A43B23/081—Toe stiffeners
- A43B23/086—Toe stiffeners made of impregnated fabrics, plastics or the like
Definitions
- the invention relates to a heat-activating reinforcing element, as a complex, and used in manufacturing footwear.
- FR-A-2 065 960 describes a composite material consisting of strips of fabric impregnated with a dispersion of elements synthetics of carboxylated styrene-butadiene polymer.
- the faces of the layer thus produced are then, for one, coated with a dispersion of synthetic materials suitable for imparting to said face the appearance of suede while being abrasion resistant and, for the other, coated with example by a sticky coating allowing its sticking to hot in a shoe.
- American patent US-A-5 354 604 also relates to a composite material serving as reinforcement, consisting of a core in thermo-deformable thermoplastic resin, layers of woven being placed on either side of said core and linked to these by layers of resins. Layers of woven material have sufficient thickness to impart sufficient rigidity and strength to the structure composite. It is preferable to use woven fibers carbon, glass or aramid. This composite material can then be shaped by heating in a mold.
- a material reinforced with of a fibrous element included within a thickness of synthetic material is subjected to a first direct coating by the material synthetic, the fibrous element is then affixed to the plaster and pressed so that the molten plaster enters the macroscopic openings defined between the fibers, a second coating is then applied in the molten state in order to fill the depressions on the surface of the element of reinforcement, joining the first plaster in the macroscopic openings of the fibrous element.
- the fibrous element is embedded by applying pressure within a single layer coating of synthetic material. In both cases, the process requires submission of the footwear to very high temperatures in order to apply the material synthetic melted as a coating.
- the coating of the material to be reinforced by a synthetic material in molten form necessarily high temperatures during the cycle manufacturing footwear that may cause damage of said material to be reinforced.
- the coating procedure of the material to be reinforced lengthens the time of the manufacturing cycle of said footwear.
- the described method envisages only the realization a reinforcement directly on the material of the article footwear during its manufacturing cycle, the material to be reinforced, which should automatically be severe temperature conditions previously mentioned.
- DE-A-41 20 134 describes a fiber support suitable for allow welding or bonding between two compounds which are not stickable or weldable with each other, these compounds which may constitute two elements to be linked footwear.
- the fibrous support comprises on one side an outer layer with which one of compounds is identical or bondable or weldable and the other side an outer layer with which the other compound is identical or bondable or weldable, chemical or mechanical.
- the fiber support can possibly also constitute an element of stiffening between the two compounds.
- JP-A-3221001 a manufacturing process reinforced footwear using a body of reinforcement formed from a shape memory polymer and shaped previously in curved form along a form of shoe mold.
- the reinforcement body is then heated and deformed into a plane form at a temperature below the molding temperature and is then introduced into a pocket then attached to the conservation of shape of the shoe upper.
- the reinforcing element therefore consists of three elements in separate layers, each of which has specific characteristics giving the element of reinforcement of specific properties.
- the reinforcing element according to the invention can be define in two parts of distinct functions, one constituting a hard end or buttress and the other a reinforcement of said hard end or buttress, the first part being constituted by the shape memory element whose dimensions and characteristics are similar to those a standard type butt or buttress and the second part consisting of the reinforcing fabric and the stiffening element whose characteristics constitute a local reinforcement for the memory element of form.
- the shape memory element provides the footwear an ability to recover its original shape even after undergone deformation, for example by impact. He contributes therefore maintaining the aesthetic integrity of said article footwear.
- any material is used thermoactivable at temperatures compatible with the manufacturing cycle of the footwear, having a shape memory such as an ethylene-acid copolymer metacrylic sold under the registered trademark SURLYN or of the type sold under the trademark IMPERFIRM.
- the stiffening element is a heat-activated resin and heat-sealed chosen so as to stiffen locally at room temperature the tissue area of reinforcement that it permeates by a local increase thick while having a softening point low, preferably below 100 ° C, to allow forming at temperatures compatible with manufacturing cycle temperatures of an item footwear.
- the layer of the stiffening element can be made by direct coating of the reinforcing fabric by said resin.
- the reinforcing fabric allows, for its part, to limit the creep of the other two laminated elements during a brief or permanent request such as crushing or slipping of the foot in the article footwear, insofar as the fibers of the fabric tensile stresses also have a low elongation capacity.
- the reinforcement fabric is a fabric of low grammage included in a range of 40 to 80 g / m 2 and whose tensile breaking stress is greater than 1000 Mpa and the tensile modulus is greater than 30000 Mpa .
- the reinforcing fabric is preferably an aramid fiber fabric whose grammage is 60 g / m 2 .
- This aramid fiber fabric provides reinforcement optimal in terms of resistance to wear, tearing and also limits the risk of foot irritation the user.
- the reinforcing element thus produced is mounted on the face internal of a rod to locally reinforce an article footwear in the same way as a usual reinforcement thermoactivable.
- the shape memory element which plays the role of a standard hard butt or buttress is preferably attached to the upper of the footwear so that the reinforcing fabric and stiffening element are placed inside said footwear.
- the reinforcing element thus produced allows a reinforcement of footwear without requiring significant change in the manufacturing cycle usual, the forming temperatures, in particular the deformation of the stiffening element and of the element with shape memory, being less than 100 ° C. So there more risk of degradation of the other constituents of footwear.
- the reinforcing element is obtained by layering flat of the three separate layers.
- the shape memory element 1 preferably has a cutting and a dimension suitable to constitute either a buttress is a standard hard end, its thickness being between 0.5 and 1.5 mm. It is coated on its external face by a hot-melt adhesive allowing its subsequent bonding on the upper 4 of an article of footwear. Her shape memory allows it to return to its original shape after deformation by shock or stress accidental.
- the light weight reinforcement fabric 2 is, from preferably an aramid fiber fabric impregnated with the stiffening element 3.
- Said stiffening element 3 is preferably consisting of poly "caprolactone" and has a point softening between 55 and 70 ° C. It covers the reinforcement fabric 2 so that it has a local thickness increase between 0.2 and 0.8 mm.
- Reinforcement fabric 2 and element layer of stiffening 3 have the same dimensions and the fabric 2 is positioned so that the fibers component of the fabric are preferably oriented at +/- 45 ° with respect to the longitudinal axis of the footwear. This position of the fibers is held in place in the reinforcing element by impregnating the reinforcing fabric 2 by the stiffening element 3.
- the reinforcing element has a structure such that the reinforcement fabric 2 is located between the memory element of form 1 and the stiffening element 3.
- the dimensions of the layer of the stiffening element 3 and reinforcing fabric 2 are such that, preferably, their surface is between 90 and 40% of the surface of the shape memory element 1.
- the element to shape memory 1 has a trimming 1 'so as not to mark the shoe after mounting on the upper 4 and in a sole 5.
- the dimensions of the reinforcing fabric 2 and the layer of the stiffening element 3 are also such that these do not cover the trimming zone 1 'of the element with shape memory 1.
- the stiffening element 3 also has a 3 'trim to obtain a variation in thickness and progressive stiffness for not to harm the comfort of the user and to preserve also the aesthetics of the footwear (absence of marking).
- Layers 1, 2 and 3 can be assembled by the process said of complexing corresponding to the superposition of different layers during the assembly of the article footwear.
- the impregnation of the fabric 2 by the stiffening element 3 intervenes during the softening of the stiffening element during forming.
- the fabric 2 is then previously impregnated with direct coating with the stiffening element 3, then laminated to the shape memory element 1.
- the reinforcing element is mounted on the rod 4 of the same so that a hard tip or a heat-activated buttress usual.
- the rod 4 of a footwear constitutes the outer shell of the reinforcing element while the fabric 2 impregnated with the stiffening element 3 performs the role of skin inside in the fitted footwear.
- the reinforcing element can however be covered internally with a protective fabric or film and cleanliness 6.
- Such a reinforcing element allow reinforcement of footwear during a cycle of normal manufacturing without the need to excessive temperature increases but, in in addition, it gives said article of footwear an improvement stiffness and shock resistance characteristics of reinforced areas of said footwear during crushing or low energy shock.
- the variation of the thickness of the reinforcing element preserves user comfort and aesthetics footwear.
- this reinforcing element can be used to reinforce any part of the stem, the dimensions and the shape of said element then being chosen according to the rod area to be reinforced.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
Claims (10)
- Elément de renfort thermoactivable destine à être mis en place dans un article chaussant et comprenant un élément à mémoire de forme thermoactivable (1),caractérisé en ce qu'il est sous forme de complexe et constitué d'au moins trois éléments en couches, lesdits éléments étant: l'élément à mémoire de forme thermoactivable (1),un élément de rigidification thermoactivable (3), etun tissu de renfort (2) inséré entre les deux premiers éléments (1 et 3), ledit élément de rigidification (3) imprégnant ledit tissu de renfort (2) et présentant un point de ramollissement inférieur au point de fusion des fibres dudit tissu de renfort (2), ledit élément de rigidification (3) et ledit élément à mémoire de forme (1) étant thermoactivables à une température inférieure à 100°C, c'est-à-dire dans la plage des températures utilisées au cours d'un cycle de fabrication d'un article chaussant.
- Elément de renfort selon la revendication 1,caractérisé en ce que le tissu de renfort (2) est un tissu de faible grammage compris dans une plage de 40 à 80 g/m2 et dont la contrainte à la rupture en traction est supérieure à 1000 Mpa et le module de traction est supérieur à 30000 Mpa.
- Elément de renfort selon l'une des revendications 1 et 2,caractérisé en ce que le tissu de renfort (2) est un tissu de fibres d'aramide de grammage 60 g/m2.
- Elément de renfort selon l'une des revendications 1 à 3,caractérisé en ce que l'élément de rigidification (3) est une résine thermoactivable et thermocollable dont le point de ramollissement est inférieur à 100°C.
- Elément de renfort selon la revendication 4,caractérisé en ce que l'élément de rigidification (3) est constitué par du poly" caprolactone " 6.
- Elément de renfort selon l'une des revendications 1 à 5,caractérisé en ce que l'élément à mémoire de forme (1) est un matériau thermoplastique tel qu'un copolymère éthylèneacide métacrylique.
- Elément de renfort selon l'une des revendications 1 à 6,caractérisé en ce que les couches (1), (2) et (3) sont montées par un procédé dit de complexage.
- Elément de renfort selon l'une des revendications 1 à 6,caractérise en ce qu'il est préfabriqué par contrecollage préalable sur l'élément à mémoire de forme (1) de l'ensemble constitué par le tissu (2) imprégné par enduction directe de l'élément de rigidification (3).
- Article chaussant comportant un élément de renfort selon l'une quelconque des revendications 1 à 8.
- Article chaussant selon la revendication 9,caractérisé en ce que le tissu de renfort (2) est positionné dans l'article chaussant de telle sorte que les fibres composant ledit tissu (2) soient orientées à +/- 45° par rapport à l'axe longitudinal de l'article chaussant.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9601882 | 1996-02-15 | ||
FR9601882A FR2744889B1 (fr) | 1996-02-15 | 1996-02-15 | Element de renfort thermoactivable pour articles chaussants et article chaussant comportant un tel element de renfort |
PCT/FR1997/000282 WO1997029657A1 (fr) | 1996-02-15 | 1997-02-14 | Element de renfort thermoactivable pour articles chaussants et article chaussant comportant un tel element de renfort |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0880327A1 EP0880327A1 (fr) | 1998-12-02 |
EP0880327B1 true EP0880327B1 (fr) | 1999-11-10 |
EP0880327B2 EP0880327B2 (fr) | 2002-08-14 |
Family
ID=9489234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97905205A Expired - Lifetime EP0880327B2 (fr) | 1996-02-15 | 1997-02-14 | Element de renfort thermoactivable pour articles chaussants et article chaussant comportant un tel element de renfort |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0880327B2 (fr) |
AU (1) | AU1883897A (fr) |
DE (1) | DE69700777T3 (fr) |
ES (1) | ES2138860T5 (fr) |
FR (1) | FR2744889B1 (fr) |
WO (1) | WO1997029657A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA863308A (en) * | 1971-02-09 | Addison W. Closson, Jr. | Shoe lining and counter stiffener | |
JPH064726B2 (ja) * | 1984-11-13 | 1994-01-19 | 住友ゴム工業株式会社 | ゴム・プラスチツク複合材 |
US4717496A (en) † | 1984-12-03 | 1988-01-05 | Giulini Chemie Gmbh | Stiffening material with melt-adhesive properties |
JPH03221001A (ja) * | 1990-01-27 | 1991-09-30 | Asahi Corp | 靴胛被の製造法 |
DE4120134C2 (de) * | 1991-06-19 | 1996-05-30 | Uhl Sportartikel Karl | Schuh, insbesondere Sportschuh |
-
1996
- 1996-02-15 FR FR9601882A patent/FR2744889B1/fr not_active Expired - Fee Related
-
1997
- 1997-02-14 ES ES97905205T patent/ES2138860T5/es not_active Expired - Lifetime
- 1997-02-14 WO PCT/FR1997/000282 patent/WO1997029657A1/fr active IP Right Grant
- 1997-02-14 DE DE69700777T patent/DE69700777T3/de not_active Expired - Fee Related
- 1997-02-14 AU AU18838/97A patent/AU1883897A/en not_active Abandoned
- 1997-02-14 EP EP97905205A patent/EP0880327B2/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU1883897A (en) | 1997-09-02 |
DE69700777T2 (de) | 2000-06-08 |
EP0880327B2 (fr) | 2002-08-14 |
DE69700777D1 (de) | 1999-12-16 |
WO1997029657A1 (fr) | 1997-08-21 |
ES2138860T3 (es) | 2000-01-16 |
DE69700777T3 (de) | 2003-04-10 |
ES2138860T5 (es) | 2003-03-01 |
EP0880327A1 (fr) | 1998-12-02 |
FR2744889B1 (fr) | 1998-04-03 |
FR2744889A1 (fr) | 1997-08-22 |
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