EP0880327A1 - 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 renfortInfo
- Publication number
- EP0880327A1 EP0880327A1 EP97905205A EP97905205A EP0880327A1 EP 0880327 A1 EP0880327 A1 EP 0880327A1 EP 97905205 A EP97905205 A EP 97905205A EP 97905205 A EP97905205 A EP 97905205A EP 0880327 A1 EP0880327 A1 EP 0880327A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- footwear
- fabric
- reinforcement
- reinforcing
- element according
- 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
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 45
- 239000004744 fabric Substances 0.000 claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 230000002787 reinforcement Effects 0.000 claims description 33
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 229920006231 aramid fiber Polymers 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000004760 aramid Substances 0.000 claims description 2
- 230000000536 complexating effect Effects 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims 1
- 239000012815 thermoplastic material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 15
- 239000002131 composite material Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 229920002994 synthetic fiber Polymers 0.000 description 6
- 208000002740 Muscle Rigidity Diseases 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 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
- 230000006870 function Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 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
- 239000003365 glass fiber 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
- 230000014759 maintenance of location Effects 0.000 description 1
- 125000000007 metacrylic acid group Chemical group 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 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
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002759 woven fabric Substances 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
- Heat-activating reinforcing element for footwear and footwear comprising such a reinforcing element.
- the invention relates to a heat-activating reinforcing element, in the form of a complex, and used in the manufacture of footwear.
- FR-A-2 065 960 describes a composite material consisting of strips of fabrics impregnated with a dispersion of synthetic elements of styrene-butadiene carboxyl polymer.
- the faces of the layer thus produced are then, for one, coated with a dispersion of synthetic materials capable of imparting to said face the appearance of suede while being resistant to abrasion and, for the other, coated for example by a sticky coating allowing its hot bonding in a shoe.
- EP-A-0 102 414 also discloses a laminated structure comprising a core of thermoplastic resin, layers of fabric being placed on either side of said thermoplastic resin core, the fibers of the fabric partially trapped in said resin also being impregnated with an adhesive which can be activated by solvent or by heating allowing the bonding of this laminated structure as reinforcement on a substrate.
- American patent US Pat. No. 5,354,604 also relates to a composite material serving as reinforcement, consisting of a core of thermo-deformable thermoplastic resin, layers of woven fabric being placed on either side of said core and bonded to them. by layers of resins.
- the layers of woven have sufficient thickness to give sufficient rigidity and strength to the composite structure.
- woven carbon, glass or aramid fibers are used. This composite material can then be shaped by heating in a mold.
- a material reinforced with a fibrous element included within a thickness of synthetic material is also known from patent FR-A-2,108,913 and its addition FR-A-2,106,526, a material reinforced with a fibrous element included within a thickness of synthetic material.
- an area of a footwear component is subjected to a first direct coating with the synthetic material, the fibrous element is then affixed to the coating and pressed so that the molten coating penetrates into 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 reinforcing element, joining the first coated in the macroscopic openings of the fibrous element.
- the fibrous element is embedded by the application of pressure within a single layer of coating of synthetic material. In these two cases, the process requires subjecting the footwear to very high temperatures in order to apply the molten synthetic material in the form of a coating.
- the coating of the material to be reinforced with a synthetic material in molten form necessarily results in high temperatures during the manufacturing cycle of the footwear which can cause damage to said material to be reinforced.
- the procedure of coating the material to be reinforced lengthens the time of the manufacturing cycle of said footwear.
- the method described only envisages the production of a reinforcement directly on the material of the footwear during its manufacturing cycle, the material to be reinforced having to be automatically subjected to the severe temperature conditions mentioned above.
- DE-A-41 20 134 describes a fiber support capable of allowing welding or bonding between two compounds which are not bondable or weldable with each other, these compounds possibly constituting two elements to be bonded to an article of footwear .
- the fibrous support comprises on one side an outer layer with which one of the compounds is identical or bondable or weldable and on the other side an outer layer with which the other compound is identical or bondable or weldable this, either chemically or mechanically.
- the fiber support can optionally also constitute a stiffening element between the two compounds.
- JP-A-3221001 discloses a process for manufacturing reinforced footwear using a reinforcement body formed from a shape memory polymer and previously shaped in curved form along a shoe mold shape.
- the reinforcement body is then heated and deformed in a plane form at a temperature below the molding temperature and is then introduced into a pocket then fixed on the shape retention area of the upper of the shoe. Then heated to a temperature allowing the reinforcing body to recover its original curved shape thus causing the shaping of the upper of the shoe.
- the subject of the invention is a heat-activatable reinforcing element, in the form of a complex, intended to be put in place in an article of footwear and consisting of at least three layered elements, characterized in that said elements are: a thermoactivable shape memory element, a thermoactivable stiffening element, and a reinforcement fabric inserted between the first two elements, said stiffening element permeating said reinforcement fabric and having a softening point lower than the melting point of the fibers of said reinforcing fabric, said stiffening element and said shape memory element being heat-activatable in the range of temperatures used during a manufacturing cycle for a footwear item.
- said elements are: a thermoactivable shape memory element, a thermoactivable stiffening element, and a reinforcement fabric inserted between the first two elements, said stiffening element permeating said reinforcement fabric and having a softening point lower than the melting point of the fibers of said reinforcing fabric, said stiffening element and said shape memory element being heat-activatable in the range of temperatures used
- the reinforcing element therefore consists of three elements in separate layers, each of these elements having their own characteristics giving the reinforcing element specific properties.
- the reinforcing element according to the invention can be defined 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 of a tip or buttress of standard type and the second part consisting of the reinforcing fabric and the stiffening element whose characteristics constitute a local reinforcement for the shape memory element.
- the shape memory element gives the footwear an ability to recover its initial shape even after having undergone a deformation, for example by impact. It therefore contributes to maintaining the aesthetic integrity of said footwear.
- any thermoactivatable material is used 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 registered trademark IMPERFIRM.
- the stiffening element is a heat-activatable and heat-sealable resin chosen so as to locally stiffen the area of the reinforcing fabric at ambient temperature, which it impregnates by a local increase in thickness while having a low softening point, preferably less than 100 "C, to allow forming at temperatures compatible with the temperatures of the manufacturing cycle for an article of footwear.
- the layer of the stiffening element can be produced by direct coating of the reinforcement fabric with said resin.
- the reinforcing fabric makes it possible to limit the creep of the two other elements laminated during a brief or permanent stress such as crushing or sliding of the foot in the footwear, insofar as the fabric fibers stressed in tension 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 optimal reinforcement in terms of resistance to wear and tear and also limits the risk of irritation to the feet of the user.
- the reinforcing element thus produced is mounted on the internal face of a rod to locally reinforce an article.
- footwear in the same way as a usual thermoactivatable reinforcement.
- the shape memory element which acts as a standard hard toe or buttress, is preferably attached to the upper of the footwear so that the reinforcement fabric and the stiffening element are placed at the inside said article of footwear.
- the reinforcing element thus produced makes it possible to reinforce a footwear item without requiring significant modification in the usual manufacturing cycle, the forming temperatures, in particular the deformation of the stiffening element and of the memory element. in shape, being less than 100 "C. There is therefore no longer any risk of degradation of the other constituents of the footwear.
- Figure 1 shows a sectional view of a reinforcing element according to the invention.
- FIG. 2 represents a sectional view of an article of footwear reinforced by the reinforcement element of FIG. 1.
- the reinforcing element is obtained by the flat superposition of the three distinct layers.
- the shape memory element 1 preferably has a cutout and a dimension suitable for constituting either a buttress or a hard end of standard type, its thickness being between 0.5 and 1.5 mm. It is coated on its external face with a hot-melt adhesive allowing its subsequent bonding on the upper 4 of a footwear item. Its shape memory allows it to return to its initial shape after deformation by impact or accidental stress.
- the light-weight reinforcement fabric 2 is preferably an aramid fiber fabric impregnated with the stiffening element 3.
- Said stiffening element 3 is preferably constituted by poly "caprolactone" and has a softening point between 55 and 70 * C. It covers the reinforcement fabric 2 so that it has a local increase in thickness included between 0.2 and 0.8 mm.
- the reinforcing fabric 2 and the stiffening element layer 3 have the same dimensions and the fabric 2 is positioned so that the fibers making up the fabric are preferably oriented at +/- 45 * relative 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
- the reinforcing element has a structure such that the reinforcing fabric 2 is located between the shape memory element 1 and the stiffening element 3.
- the reinforcing fabric 2 are such that, preferably, their surface is between 90 and 40% of the surface of the shape memory element 1.
- the shape memory element 1 has a trim 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 of the layer of the stiffening element 3 are also such that these do not cover the trimming zone l ′ of the shape memory element 1.
- the stiffening element 3 also has a trimming 3 'in order to obtain a variation in thickness and progressive rigidity so as not to harm the comfort of the user and to also preserve the aesthetics of the footwear (absence of marking).
- the layers 1, 2 and 3 can be mounted by the so-called complexing process corresponding to the superposition of the different layers during the mounting of the footwear.
- the impregnation of the fabric 2 by the stiffening element 3 occurs during the softening of the stiffening element during forming.
- the fabric 2 is then previously impregnated by direct coating with the stiffening element 3, then laminated to the shape memory element 1.
- the reinforcing element is mounted on the rod 4 in the same way as a hard end or a usual thermoactivable buttress.
- the upper 4 of an article of footwear constitutes the outer envelope of the reinforcing element while the fabric 2 impregnated with the stiffening element 3 acts as an inner skin in the fitted footwear.
- the reinforcing element can however be covered internally with a fabric or a protective and cleanliness film 6. Not only does such a reinforcing element allow a reinforcement of footwear item during a normal manufacturing cycle without it being necessary to carry out excessive temperature increases but, moreover, it confers on said footwear item an improvement characteristics of rigidity and impact resistance of the reinforced areas of said footwear during crushing or low energy impact.
- the variation in the thickness of the reinforcing element preserves the comfort of the user and the aesthetics of the footwear.
- this reinforcing element can be used to reinforce any part of the rod, the dimensions and the shape of said element then being chosen as a function of the zone of the rod to be reinforced.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
FR9601882 | 1996-02-15 | ||
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 true EP0880327A1 (fr) | 1998-12-02 |
EP0880327B1 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 AU AU18838/97A patent/AU1883897A/en not_active Abandoned
- 1997-02-14 ES ES97905205T patent/ES2138860T5/es not_active Expired - Lifetime
- 1997-02-14 EP EP97905205A patent/EP0880327B2/fr not_active Expired - Lifetime
- 1997-02-14 DE DE69700777T patent/DE69700777T3/de not_active Expired - Fee Related
- 1997-02-14 WO PCT/FR1997/000282 patent/WO1997029657A1/fr active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9729657A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2138860T3 (es) | 2000-01-16 |
ES2138860T5 (es) | 2003-03-01 |
EP0880327B1 (fr) | 1999-11-10 |
DE69700777D1 (de) | 1999-12-16 |
FR2744889B1 (fr) | 1998-04-03 |
FR2744889A1 (fr) | 1997-08-22 |
DE69700777T3 (de) | 2003-04-10 |
AU1883897A (en) | 1997-09-02 |
EP0880327B2 (fr) | 2002-08-14 |
WO1997029657A1 (fr) | 1997-08-21 |
DE69700777T2 (de) | 2000-06-08 |
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