EP0428887B1 - Verfahren zur Herstellung eines geleimten Skis Verfahren zur Herstellung eines geleimten Skis - Google Patents

Verfahren zur Herstellung eines geleimten Skis Verfahren zur Herstellung eines geleimten Skis Download PDF

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Publication number
EP0428887B1
EP0428887B1 EP90120350A EP90120350A EP0428887B1 EP 0428887 B1 EP0428887 B1 EP 0428887B1 EP 90120350 A EP90120350 A EP 90120350A EP 90120350 A EP90120350 A EP 90120350A EP 0428887 B1 EP0428887 B1 EP 0428887B1
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EP
European Patent Office
Prior art keywords
film
adhesive
polymer
grafted
copolymer
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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
Application number
EP90120350A
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English (en)
French (fr)
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EP0428887A1 (de
Inventor
Jean-Pierre Nurit
Gilles Recher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salomon SAS
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Salomon SAS
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Publication date
Application filed by Salomon SAS filed Critical Salomon SAS
Publication of EP0428887A1 publication Critical patent/EP0428887A1/de
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Publication of EP0428887B1 publication Critical patent/EP0428887B1/de
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials

Definitions

  • the present invention relates to the manufacture of skis used in winter sports, and intended to slide on snow and ice.
  • the structure generally comprises peripheral protective elements, forming the upper face and the lateral faces of the ski, internal resistance elements or resistance blades, made of a material having high resistance and great stiffness.
  • the structure also includes filling elements such as a honeycomb core, and a sliding sole forming the underside of the ski and ensuring good sliding on the snow.
  • the manufacture of modern skis therefore uses a wide variety of materials: the gliding soles are generally made of polyethylene; the alveolar cores are made of wood or synthetic foam; the edges arranged on the lower edges of the ski are made of steel; reinforcements are often provided in aluminum alloy; the upper surfaces of the ski are made of thermoplastic sheet.
  • the two binders mainly used are epoxies and polyurethanes.
  • binders are not sufficient to easily adhere all the materials that one wishes to use in the composition of a modern ski. To obtain adhesion on certain materials, surface treatments or primers must be used to promote adhesion.
  • the primers are initially in solution in solvents: the solvents react on the substrates to which the primer is applied, causing risks of embrittlement; in in addition, during their evaporation, they are aggressive towards users, they risk causing accidents, and cause harmful pollution.
  • the application of primers must also be carried out with great regularity, in order to obtain a layer of constant thickness, which leads to complex and difficult operations.
  • the primer once applied to a substrate, requires using the substrate relatively quickly for the manufacture of the ski, excluding long-term storage.
  • the document FR-A-2627700 relates to a method of assembling elements of a ski which consists of making a film adhere to each element to be assembled, then carrying out the assembly proper by melting the films together.
  • the object of the present invention is in particular to avoid the drawbacks of known methods, by proposing a new method allowing bonding on practically all surfaces of the components of the ski, without requiring surface treatments or coating of primers.
  • the invention allows the bonding of a polyamide sheet as the upper ski surface, by bonding using an epoxy adhesive, a polyester adhesive, or a vinylester adhesive.
  • the method of manufacturing a ski according to the present invention comprises an assembly step comprising one or more successive steps during which (of which) the assembly of at least a first element and a second element by the action of a layer of adhesive between the junction surface of the second element and a film interposed in the solid state comprising at least one layer based on grafted polymer or copolymer; during a first step or during the final assembly step, proper, the face of the film oriented towards the junction surface of the first element is directly secured to said junction surface of the first element by a chemical or physical bond -chemical or by interdiffusion of the polymer chains, or by mechanical anchoring, or by welding, characterized in that during the finished stage, the face of the film facing the adhesive surface is adhered with the adhesive layer by pressing hot.
  • the film is advantageously based on polymer or copolymer grafted by the action of carboxylic acid, carboxylic acid anhydride or carboxylic acid ester.
  • a polymer can usefully be grafted by the action of acrylic acid, methacrylic acid, or maleic anhydride, or by a combination of two or three of these products.
  • the grafted polymer can be a polyethylene.
  • the grafted polymer can be a copolymer of ethylene and vinyl acetate (EVA).
  • EVA vinyl acetate
  • an epoxy adhesive or a polyester adhesive to assemble by bonding, with the interposition of such a film based on grafted polyethylene, a first element consisting of one of the following materials: polyamide, untreated polyethylene , polyethylene terephthalate, polybutadiene terephthalate, polypropylene, aluminum alloy, treated aluminum or steel.
  • the method of the invention allows the assembly of a first element 1 and a second element 2, according to their respective joining surfaces 3 and 4, by means of 'a layer of glue 5 interposed between said joining surfaces 3 and 4.
  • the second element 2 is assumed to be compatible with the colla 5, that is to say that the colla 5 has good adhesion on the second element 2.
  • the first element 1 is made of a material which may not have good compatibility with the colla 5, that is to say that the glue 5 does not have good adhesion on the joining surface 3 of the first element 1.
  • the first element 1 not having a good adhesion power with the adhesive 5
  • the film 6 is hot-melt.
  • the film 6 must have a bonding face, or face facing the colla 5, of a material such that the colla 5 has good adhesive power on the film 6.
  • the film must also have an assembly face, or face oriented towards the junction surface 3 of the first element 1, in a material allowing its joining with said junction surface 3 of the first element 1.
  • connection between the film 6 and the first element 1 can be ensured by a chemical or physicochemical bond or by interdiffusion of the polymer chains, or by mechanical anchoring, or by welding.
  • FIGS. 1 to 4 a first possibility, represented in FIGS. 1 to 4, consists in coating the joining surface 4 of the second element 2 with an adhesive 5, as shown in FIG. 3, before assembly by pressing the adhesive layer 5 against the film 6 and obtaining the assembly shown in FIG. 4.
  • a second way of ensuring the joining between the film and the second element 2 can be provided in the case where the second element 2 comprises a junction surface 4 based on polyester resin which is not entirely crosslinked. It is then possible to apply the junction surface 4 of the second element 2 directly against the film 6, and, by heating, the not entirely crosslinked resin of the second element 2 itself ensures the bonding function, the adhesion being obtained by complementing crosslinking of said resin.
  • the film 6 can advantageously be produced by an electrostatic powdering process.
  • a very thin film 6 can be used, with a thickness advantageously between a few microns and a few tenths of a millimeter: a thickness of a few microns may be sufficient.
  • a film 6 based on polymer or copolymer grafted by the action of carboxylic acid or carboxylic acid anhydride for example by acrylic acid, by methacrylic acid, or by maleic anhydride.
  • Such a film 6 can in particular be made of grafted polyethylene, for example of polyethylene grafted with maleic anhydride.
  • This embodiment allows, for example, to ensure the bonding by an epoxy adhesive or a polyester adhesive of a first element 1, the junction surface of which is made of one of the following materials: polyamide, untreated polyethylene, polyethylene terephthalate, polybutadiene terephthalate, polypropylene, treated aluminum, aluminum alloy or steel.
  • the film 6 may consist of a copolymer of ethylene and vinyl acetate (EVA), grafted by the action of carboxylic acid or of carboxylic acid anhydride.
  • EVA vinyl acetate
  • ionomer film can advantageously be used for bonding with an epoxy adhesive or a polyester adhesive of a first element 1, the joining surface of which consists of one of the following materials: untreated polyethylene, aluminum alloy, aluminum treated or steel.
  • a "compatibilizing" film 6 of polyethylene grafted with maleic anhydride allows the bonding of a first element 1 of polyamide by an adhesive 5 of epoxy resin.
  • the film 6 is caused to adhere to the first element 1 by chemical reaction between the maleic anhydride groups grafted on the surface of the polyethylene and the end groups of the polyamide. These groups exist in low concentration in the material, but have the particularity of migrating to the extreme surface during the extrusion of the polyamide sheet and are therefore available for the reaction.
  • the reaction leads to the substitution of the oxygen atom of the maleic cycle by the nitrogen atom of the amino terminal group of the polyamide and formation of a water molecule. It is necessary to bring the substrates to temperatures above 115 ° C to initiate the reaction. It is therefore possible to press hot, by calendering or pressing, the film 6 against the first element 1 to ensure that they join together.
  • the film 6 can be of the monolayer type, as shown in FIGS. 1 to 4.
  • the film 6 may be of the multilayer type, as shown in FIG. 7, comprising at least a first layer 61 forming an adhesive face compatible with the adhesive 5, and a second layer 62 forming an assembly face compatible with the first item 1.
  • the assembly is carried out in successive stages: during a first step illustrated by FIGS. 1 and 2 the film 6 known as "compatibilizing" is assembled by calendering or hot pressing on the junction surface 3 of the first element 1 having a lack of adhesion with the adhesive 5; the temperature must be raised to the softening point of the film; during a second step, the adhesive 5 is applied to the junction surface 4 of the second element 2, as shown in Figure 3; during a third step, the layers constituted by the adhesive 5 and the film 6 are applied against each other, carrying out the assembly as shown in FIG. 4.
  • the method of the invention makes it possible to obtain a ski with a composite structure, comprising at least a first element 1 and a second element 2 secured to one another by an adhesive 5 placed between the two joining surfaces elements, a so-called “compatibilizing” film being placed between the adhesive and the first element 1, said film allowing the elements to be joined by bonding to one another.
  • a so-called "compatibilizing” film of polymer comprising at least one layer consisting of grafted polymers or copolymers.

Claims (13)

  1. Verfahren zur Herstellung eines Ski mit einem zusammengesetzten Aufbau, das einen Schritt des Zusammenfügens aufweist, der eine oder mehrere aufeinanderfolgende Schritte aufweist, während dem (denen) man das Zusammenfügen von zumindest einem ersten Element (1) und einem zweiten Element (2) durch Wirkung einer Klebstoffschicht zwischen der Verbindungsoberfläche (4) des zweiten Elementes (2) und einer Schicht (6) realisiert, die im festen Zustand zwischengefügt ist, die zumindest eine Schicht auf der Basis von Polymer oder einem veredelten Copolymer aufweist; im Verlauf eines ersten Schrittes oder während dem Schritt des eigentlichen Endzusammenfügens wird die Seite der Schicht, die in Richtung der Verbindungsoberfläche (3) des ersten Elementes (1) gerichtet ist, fest direkt mit der Verbindungsoberfläche (3) des ersten Elementes durch eine chemische oder physico-chemische Verbindung oder durch Zwischendiffusion von Polymerketten, oder durch mechanische Verankerung, oder durch Schweißen verbunden,
    dadurch gekennzeichnet, daß
    man während dem Endschritt die Seite der Schicht, die in Richtung der Klebstoffoberfläche gerichtet ist, an der Klebstoffschicht (4) durch Heißpressen anhaften laßt.
  2. Verfahren gemaß Anspruch 1, dadurch gekennzeichnet, daß die Schicht (6) auf Polymer oder Copolymer basiert, das durch Wirkung einer Carbonsäure, eines Carbonsäureanhydrides oder von Carbonsäurester veredelt worden ist.
  3. Verfahren gemäß Anspruch 2, dadurch gekennzeichnet, daß die Schicht auf Polymer oder Copolymer basiert, das durch Wirkung von Akrylsäure veredelt worden ist.
  4. Verfahren gemaß Anspruch 2, dadurch gekennzeichnet, daß die Schicht auf Polymer oder Copolymer basiert, das durch Wirkung von Methakrylsäure veredelt worden ist.
  5. Verfahren gemäß Anspruch 2, dadurch gekennzeichnet, daß die Schicht auf Polymer oder Copolymer basiert, das durch Wirkung von Maleinanhydrid veredelt worden ist.
  6. Verfahren gemäß Anspruch 2, dadurch gekennzeichnet, daß die Schicht auf Polymer oder Copolymer basiert, das durch eine Kombination von Akrylsäure und/oder Methakrylsäure und/oder Maleinanhydrid veredelt worden ist.
  7. Verfahren gemäß einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß das Polymer ein Polyethylen ist.
  8. Verfahren gemäß einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß das Polymer ein Copolymer aus Ethylen und Vinylacetat ist (EVA).
  9. Verfahren gemaß Anspruch 7, dadurch gekennzeichnet, daß man, nach dem Veredeln mit einer Säure, durch ein metallisches Ion neutralisiert, um eine Schicht auf Ionomerbasis zu erhalten.
  10. Verfahren gemäß Anspruch 7, dadurch gekennzeichnet, daß:
    - der Klebstoff (5) ein Epoxidklebstoff oder ein Polyesterklebstoff ist,
    - das erste Element (1) eine Verbindungsoberfläche (3) aufweist, die aus einem der folgenden Materialien gebildet ist: Polyamid, nicht behandeltes Polyethylen, Polyethylen-Terephtalat, Polybutadien-Terephtalat, Polypropylen, eine Alumminiumlegierung, behandeltes Aluminium oder Stahl.
  11. Verfahren gemaß Anspruch 9, dadurch gekennzeichnet, daß:
    - der Klebstoff (5) ein Epoxidklebstoff oder ein Polyesterklebstoff ist,
    - das erste Element (1) eine Verbindungsoberfläche (3) aufweist, die aus einem der folgenden Materialien gebildet ist: nicht behandeltes Polyethylen, eine Aluminiumlegierung, behandeltes Aluminium oder Stahl.
  12. Verfahren gemäß einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Schicht (6) vom Monoschicht-Typ ist.
  13. Verfahren gemäß einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Schicht (6) vom Multischicht-Typ ist und zumindest eine erste Schicht (61) aufweist, die die Klebeseite bildet, die kompatibel mit dem Klebstoff (5) ist, und eine zweite Schicht (62), die die Zusammenfügeseite bildet, die kompatibel mit dem ersten Element (1) ist.
EP90120350A 1989-11-22 1990-10-24 Verfahren zur Herstellung eines geleimten Skis Verfahren zur Herstellung eines geleimten Skis Expired - Lifetime EP0428887B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915663 1989-11-22
FR8915663A FR2654643B1 (fr) 1989-11-22 1989-11-22 Procede de fabrication d'un ski colle, et structure de ski obtenue par ce procede.

Publications (2)

Publication Number Publication Date
EP0428887A1 EP0428887A1 (de) 1991-05-29
EP0428887B1 true EP0428887B1 (de) 1994-10-05

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EP90120350A Expired - Lifetime EP0428887B1 (de) 1989-11-22 1990-10-24 Verfahren zur Herstellung eines geleimten Skis Verfahren zur Herstellung eines geleimten Skis

Country Status (5)

Country Link
EP (1) EP0428887B1 (de)
JP (1) JPH0736850B2 (de)
AT (1) ATE112500T1 (de)
DE (1) DE69013121T2 (de)
FR (1) FR2654643B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558009A1 (de) * 1992-02-27 1993-09-01 Salomon S.A. Verfahren zur Herstellung eines Skis
EP0581098A1 (de) * 1992-07-31 1994-02-02 Salomon S.A. Verfahren zur Herstellung eines Skis
EP0712721A1 (de) 1994-11-21 1996-05-22 Salomon S.A. Verfahren zur Herstellung eines geleimten Skis und einer Non-Vorbereitungsstufe des Verstärkungsmaterials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718648B1 (fr) * 1994-04-15 1996-06-14 Rossignol Sa Ski et son procédé de fabrication.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341837A (en) * 1978-08-11 1982-07-27 Kureha Kagaku Kogyo Kabushiki Kaisha Laminar thermoplastic resin structure
ES487111A1 (es) * 1978-12-22 1980-10-01 Monsanto Co Un procedimiento para la preparacion de un estratificado de metal-termoplastico-metal
DE3071445D1 (en) * 1979-07-24 1986-04-03 Isovolta Process for preparing sheets of elastomer material and utilisation thereof for sticking
DE3462799D1 (en) * 1983-12-12 1987-04-30 Takeda Chemical Industries Ltd Heat adherable resin compositions and aluminum sheet laminated with the compositions
AT382083B (de) * 1984-10-24 1987-01-12 Blizzard Gmbh Mehrschichtenski
JPS6394838A (ja) * 1986-10-09 1988-04-25 株式会社神戸製鋼所 制振金属板の製造方法
FR2627700B1 (fr) * 1988-02-25 1991-05-03 Salomon Sa Procede d'assemblage d'un ski par soudage, et structure de ski ainsi obtenue

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558009A1 (de) * 1992-02-27 1993-09-01 Salomon S.A. Verfahren zur Herstellung eines Skis
FR2687925A1 (fr) * 1992-02-27 1993-09-03 Salomon Sa Procede de fabrication d'un ski et ski obtenu par ce procede.
EP0581098A1 (de) * 1992-07-31 1994-02-02 Salomon S.A. Verfahren zur Herstellung eines Skis
FR2694201A1 (fr) * 1992-07-31 1994-02-04 Salomon Sa Procédé de fabrication d'un ski.
US5449425A (en) * 1992-07-31 1995-09-12 Salomon S.A. Method for manufacturing a ski
EP0712721A1 (de) 1994-11-21 1996-05-22 Salomon S.A. Verfahren zur Herstellung eines geleimten Skis und einer Non-Vorbereitungsstufe des Verstärkungsmaterials

Also Published As

Publication number Publication date
FR2654643A1 (fr) 1991-05-24
DE69013121D1 (de) 1994-11-10
ATE112500T1 (de) 1994-10-15
DE69013121T2 (de) 1995-01-26
JPH03176091A (ja) 1991-07-31
FR2654643B1 (fr) 1992-09-25
EP0428887A1 (de) 1991-05-29
JPH0736850B2 (ja) 1995-04-26

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