EP1449568A1 - Outer side of a snowboard with transparent protection film and his production method - Google Patents

Abstract

A snowboard comprising an exterior face formed from an upper decoration and protection combination covered over at least part of its upper surface by one or more films of varnish which forms a collection of bumps arising from the surface. The collection of bumps created on the surface a relied decoration of drops or runs giving the impression of the freezing of a liquid which has been sprayed or poured onto the surface. The bumps have a height of 0.2-1.2 mm and preferably about 0.5mm. Their size is 200-2000 dm 2>. The varnish layer is transparent or translucent so that the base decoration can be seen through it. An independent claim is included for a method of producing the claimed snow board comprising the final steps of (1) preparing the upper surface by abrading; (2) applying to the exterior surface an even layer of a varnish based on acrylate oligomers and monomer, hardening under UV with a dry extract 90-100; (3) hardening the film under UV at 0.5-1.5 J/cm 2>; (4) applying a 20-120 mu m coat of a similar varnish; (5) harding under UV at 1.5-2 J/cm 2> To obtain a collection of bumps, the board is held upright between the application of the second varnish coat and drying to form runs. The decoration is applied after preparing the surface and before applying the varnish coats.

Description

The present invention relates to a snow gliding board with an outer face comprising a transparent protective film. The invention also relates to a process for producing a board for gliding on snow having an outer film of protection.

The finishing of the outside is an important phase in the manufacture of a snow gliding board, such as alpine skiing, surfing, monoski, cross-country skiing hiking, cross-country skiing, ... The upper set of decoration and protection, intended to provide both decoration and superior protection of the board, must be of high quality, durable, resistant to external aggressions and inexpensive. This together must indeed resist scratches, UV, low temperatures, humidity, cleaning solvents, ...

Besides decorations obtained thanks to different types of colors and pigmentations, efforts focused on achieving optical effects particularly attractive on the outside of the gliding board and its upper set of decoration and protection.

State of the art

We know a first current technique to create decorations at the level of the outer face of a gliding board which consists of providing in the part of the injection mold, corresponding to the upper decoration and protection assembly, cavities and / or growths. When injecting or molding the board, the upper assembly will conform very exactly to these cavities and / or growths.

However, depending on whether it is a molding or injection operation and in depending on the choice of materials constituting the upper assembly and the thickness of this set, it is not possible to obtain any reliefs on the face outside of the board. In addition, this technique is particularly expensive, because engraving the mold is an extremely precise operation. The mold is not profitable only after a large series of injection or molding. In addition, such a mold is very difficult to clean in case of glue or injection foam smudges.

We also know gliding boards which include on their face exterior decoration with slight reliefs obtained by insertion into the mold of an insert in the form of a honeycomb sheet of polymer material coming to press on and to join the upper set of decoration and protection.

However, such a production method requires precise positioning of the patch. However, such positioning of the part will take time and slow down the production line of skis. In addition, the patch is lost resulting in a additional production cost.

Other methods make it possible to obtain a grainy appearance of the external face a gliding board, especially in the final stage of production, by depositing on the upper set of decoration and protection of the board a layer of lacquer or varnish containing fillers made up of particles or lumps.

However, the aesthetic effect obtained with very fine asperities is not that which will catch the eye of the end user the most. The size of lumps is limited, which results in a fairly fine grainy appearance. Finally, in these processes, the application of the lacquer layer can only be done with a few specific machines, for example curtain machines, excluding the possibility of using a spray.

Statement of the invention

A first problem which the invention proposes to solve is to obtain a decorated outer surface which makes the board particularly gliding on snow attractive. A second problem is to create evocative reliefs that can recall the primary function of the board which is to be used on slopes snowy, cold and / or icy. A third problem is to successfully present a Snowboard with an even reinforced exterior face. A fourth problem is the development of an economical process for making a gliding board on snow incorporating final stages of decoration carried out after molding or injection.

A board for gliding on snow comprises in particular an outer face formed an upper set of decoration and protection, said upper set of decoration and protection being covered with at least one film of varnish at least on its outer surface.

According to a first aspect of the present invention, the film or films of varnishes form a set of bumps protruding over all or part of the face exterior of the snowboard.

In other words, the bumps are only created by the varnish or varnishes used. By the outer face of the snow gliding board and the outer surface of the assembly superior decoration and protection, we mean the upper areas, i.e. oriented upwards, but which may or may not include the edges side and / or edges.

Very preferably, the set of bumps can achieve on the outer face snowboarding an apparent decoration in relief having an aspect of drops and / or drips. These drops, droplets and / or these drips, drips can dramatically freeze a liquid sprayed and / or having flowed on this external face of this board for gliding on snow. With such an exterior face, the user will have the impression that his board slides out of the freezer. A completely analogous corresponding image is that of a cocktail glass with icing obtained from the rim.

The bumps, belonging to the set of bumps, can favorably be distributed randomly over all or part of the outer face of the snow gliding board. The bumps, belonging to the set of bumps, can have a height substantially between 0.2 mm and 1.2 mm. Preferably, this height can be substantially equal to 0.5 mm. The set of drop-shaped bumps may have a number of bumps substantially between 200 / dm ² and 2000 / dm ² .

The varnish film or films covering the upper decoration and protection may be transparent or translucent, so as to reveal the decoration of said upper decoration and protection assembly.

• préparation de la surface extérieure de l'ensemble supérieur de décoration et de protection ;
• d'application sur la surface extérieure préparée de l'ensemble supérieur de décoration et de protection d'un premier film régulier d'un vernis à base d'oligomères et monomères acrylate durcissant sous rayonnement U.V., présentant un extrait sec sensiblement compris entre 90 et 100 ;
• de durcissement du premier film sous rayonnement U.V. avec une énergie rayonnée sensiblement comprise entre 0,5 J/cm² et 1,5 J/cm² ;
• d'application par pulvérisation sur le premier film durcis d'un deuxième film d'une épaisseur sensiblement comprise entre 20 µm et 120 µm, d'un vernis à base d'oligomères et monomères acrylate durcissant sous rayonnement U.V., présentant un extrait sec sensiblement compris entre 90 et 100 ; et
• de durcissement du deuxième film sous rayonnement U.V. avec une énergie rayonnée sensiblement comprise entre 1,5 J/cm² et 2 J/cm² ;

   de façon à obtenir un ensemble de bosses faisant saillies sur toute ou partie de la face extérieure de la planche de glisse sur neige.According to a second aspect of the present invention, a method for producing a board for gliding on snow, comprising in particular an outer face formed by an upper decoration and protection assembly, by molding or by injection, further comprises: final stages of:

• preparation of the exterior surface of the upper decoration and protection assembly;
• of application to the prepared external surface of the upper decoration and protection assembly of a first regular film of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between 90 and 100;
• curing the first film under UV radiation with a radiated energy substantially between 0.5 J / cm ² and 1.5 J / cm ² ;
• application by spraying on the first hardened film of a second film of a thickness substantially between 20 μm and 120 μm, of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between 90 and 100; and
• curing the second film under UV radiation with a radiated energy substantially between 1.5 J / cm ² and 2 J / cm ² ;

so as to obtain a set of bumps protruding over all or part of the outer face of the snow gliding board.

In other words, with the process, we reinforce the external face while creating attractive reliefs. The step of preparing the exterior surface of the upper assembly decoration and protection can be done advantageously by an operation of graining or sanding. The varnish based on oligomers and acrylate monomers hardening under UV radiation of the first and second film can be a varnish chosen from the group comprising, alone or as a mixture, urethane-acrylate varnishes, epoxy-acrylate, acrylic-acrylate and polyester-acrylate.

The thickness of the second film may be substantially equal to 40 μm, for of example of realization. In a first alternative, the drips can be obtained at the spatula due to its upward tilt. In second alternative, you can insert a step to hold the gliding board on snow vertically, between the step of applying the second film and the step of hardening of the second film under UV radiation, so as to obtain bumps in the form of drips substantially over the entire length of the gliding board.

We can favorably interpose a step of decorating the exterior surface of the upper decoration and protection set, which can be placed between the stage preparation of this outer surface of the upper decoration assembly and protection and the application stage of the first film.

Brief description of the figures

• la Figure 1 représente une vue synoptique des différentes étapes finales du procédé de réalisation selon l'invention d'une planche de glisse sur neige ;
• la Figure 2 représente un agrandissement du détail A de la Figure 1, représentant en perspective la spatule d'une première variante de réalisation d'une planche de glisse sur neige selon l'invention ; et
• la Figure 3 représente un agrandissement du détail B de la Figure 1, représentant en perspective de la zone de talon d'une deuxième variante de réalisation d'une planche de glisse sur neige selon l'invention.

The invention will be clearly understood and its various advantages and various characteristics will become more apparent from the following description, from the nonlimiting exemplary embodiment, with reference to the appended schematic drawings, in which:

• FIG. 1 represents a synoptic view of the various final stages of the production method according to the invention of a board for gliding on snow;
• Figure 2 shows an enlargement of detail A of Figure 1, showing in perspective the tip of a first alternative embodiment of a board for gliding on snow according to the invention; and
• Figure 3 shows an enlargement of detail B of Figure 1, showing in perspective the heel area of a second alternative embodiment of a board for gliding on snow according to the invention.

Detailed description of the invention

A classic snowboard, such as an alpine ski (1) includes a front area with a spatula (2), a rear area with a raised heel (3), a central area called skate area (4), two lateral edges (5), one side exterior (6) formed by an upper protection and decoration assembly and a underside forming the gliding sole (7) delimited on either side by the two side edges (5).

A method of making the ski (1) commonly implemented begins with the different classic steps, positioning the different component parts in a mold for a molding or foam injection operation polyurethane, not described and not shown. The ski (8) is then machined on all of its faces, but not yet decorated.

According to the method of the invention, the production of the ski (1) continues with the preparation of its outer face (9). This preparation includes different stages (I to V) to form the outer face (6) of the upper decoration and protection.

In a first step (I), we start by preparing the exterior surface (9) of the upper decoration and protection assembly by a sanding operation. This sanding is carried out by abrasive belt machines, grinders or tools brushing (11). Thanks to this sanding, an external surface (12) of the assembly is obtained. superior decoration and protection, with a roughness ready to undergo the stages later.

At this level, you can insert a decoration step (not shown) by screen printing or pad printing the outer surface (12) of the upper assembly of decoration and protection.

In a second step (II), apply to the sanded outer surface (12) of the upper set of decoration and protection a first regular film of a varnish based on oligomers and acrylate monomers hardening under UV radiation. have given good results, the varnish is, for example, a polyurethane-acrylate, marketed by the company Celliose, under the name Celluve and the reference 3721 LX. This varnish has a dry extract substantially between 90 and 100.

This application is carried out by a curtain machine (13) or by spraying. Other devices for applying the first varnish film may be used. As for example, the first film (14) has a thickness substantially between 60 µm and 100 µm, and preferably equal to 70 µm.

In a third step (III), the first film (14) is partially hardened by subjecting the outer surface under UV radiation. A UV tunnel from the company Giardina (16) delivers, for example, substantially equal radiated energy. at 0.5 J / cm ² . The radiated energy is measured by a UVIMAP detector from the company EIT.

An outer surface (17) of the upper decoration and protection, the first film of varnish is crosslinked and hardened. The outer surface (17) is ready for the next steps.

In a fourth step (IV), spray is applied to the surface exterior with the first cured film (17) a second film of a base varnish of acrylate oligomers and monomers curing under UV radiation. given good results, the varnish is, for example, a polyurethane-acrylate, marketed by the company Celliose, under the name Celluve and the reference 3721 LX. This varnish has a dry extract substantially between 90 and 100.

This application is carried out by spraying (18) or spraying. other devices for applying the second varnish film (19) by spraying may be used. For example, the second film (19) has a thickness that is substantially equal to 40 µm, before its bump-like shrinkage.

In a fifth step (V), the second film (19) is hardened by subjecting the outer surface to UV radiation. A tunnel from the company Giardina (16) delivers, for example, a radiated energy substantially equal to 1 , 5 J / cm ² . The radiated energy is measured by a UVIMAP detector from the company EIT.

The outer face (6) of the upper decoration and protection, the second varnish film (19) of which is crosslinked and hardened. The two films by varnishes (14 and 19) covering the upper decoration and protection assembly are transparent or translucent, so as to reveal the decoration, for example pigmentation, performed before injection for the upper set of decoration and protection. At the exit of the UV tunnel, the decorated ski (1) is finished and has bumps in relief (21 and 22) obtained by localized withdrawals from the second varnish film (19).

According to the invention, and in a first alternative embodiment (see Figure 2), the second and last film of varnish covering the upper protection and decoration forms a set of drips (21), protruding over part of the face outside (6) corresponding to the spatula (2). These drips (21) are distributed so random at the spatula (2).

These drips (21) have a height substantially equal to 0.5 mm and a length substantially between 50 mm and 300 mm, preferably substantially equal to 100 mm. The number of drips (21) is substantially between 5 / dm ² and 20 / dm ² , preferably substantially equal to 10 / dm ² .

In a first alternative of this first alternative embodiment, the drips (21) are obtained only at the spatula (2) due to its natural inclination raised upwards relative to the rest of the ski (1).

In a second alternative of this first alternative embodiment, the drips (21) are obtained substantially over the entire length of the ski (1). For this second alternative, the ski (1) is maintained with its heel (3) oriented downwards, preferably substantially vertically, for a few seconds, between the step of spraying (IV) of the second film (19) and step (V). The length of the drips (21) will depend on the holding time of the ski (1) vertically, before the final hardening.

According to the invention, and in a second alternative embodiment (see Figure 3), the second and last film of varnish covering the upper protection and decoration forms a set of droplets (22), protruding over the entire outer face (6).

These droplets (22) have a height substantially equal to 0.5 mm and a diameter substantially between 1 mm and 8 mm, preferably substantially equal to 3 mm. The number of droplets (22) is substantially between 200 / dm ² and 2000 / dm ² , preferably substantially equal to 500 / dm ² .

The present invention is not limited to the embodiments described and illustrated. Many modifications can be made, without leaving the framework defined by the scope of the set of claims.

All decoration possibilities remain accessible. The outer face (6) of the same board for gliding on snow (1) may only include runs (21) or only droplets (22), or simultaneously drips (21) and droplets (22). All areas of presence or absence of drips (21) and / or droplets (22) on the outer face (6) of the same snow gliding board (1) could be envisaged according to the wishes of the manufacturer.

Claims (12)

Snow gliding board comprising in particular an outer face (6) formed of an upper decoration and protection assembly, said upper decoration and protection assembly being covered with at least one film of varnish at least on its external surface, characterized in that the varnish film or films (19) form a set of bumps (21, 22) projecting over all or part of the external face (6) of the snow gliding board (1). Snow gliding board according to claim 1, characterized in that the set of bumps provides on the outer face (6) of the snow gliding board (1) an apparent decoration in relief having an appearance of drops (22) or drips (21), giving the impression of freezing of a liquid sprayed and / or having flowed on said outer face (6) of said snow gliding board (1). Snow gliding board of claim 1 or 2, characterized in that the bumps (21, 22), belonging to the set of bumps, are distributed randomly over all or part of the outer face (6) of the board sliding on snow (1). Snow gliding board according to one of the preceding claims, characterized in that the bumps (21, 22), belonging to the set of bumps, have a height substantially between 0.2 mm and 1.2 mm, of preferably substantially equal to 0.5 mm. Snow gliding board according to one of the preceding claims, characterized in that the set of bumps has a number of bumps (21, 22) substantially between 200 / dm ² and 2000 / dm ² . Snow gliding board according to one of the preceding claims, characterized in that the varnish film or films (14, 19) covering the upper decoration and protection assembly are transparent or translucent, so as to allow the decoration to appear of said upper decoration and protection assembly. Method for producing a snow gliding board (1), comprising in particular an outer face (6) formed by an upper decoration and protection assembly, by molding or by injection, characterized in that it further comprises the final stages of: preparation (I) of the external surface (9) of the upper decoration and protection assembly; application (II) on the prepared external surface (12) of the upper decoration and protection assembly of a first regular film (14) of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between 90 and 100; curing (III) of the first film (14) under UV radiation with a radiated energy substantially between 0.5 J / cm ² and 1.5 J / cm ² ; of application (IV) by spraying onto the first hardened film (17) a second film (19) of a thickness substantially between 20 μm and 120 μm, of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between 90 and 100; hardening (V) of the second film (19) under UV radiation with a radiated energy substantially between 1.5 J / cm ² and 2 J / cm ² ; so as to obtain a set of bumps (21, 22) projecting over all or part of the outer face (6) of the snow gliding board (1). Method according to claim 7, characterized in that the stage of preparation (I) of the external surface (9) of the upper decoration and protection assembly is carried out by a graining or sanding operation. Method according to claim 7 or 8, characterized in that the varnish based on oligomers and acrylate monomers curing under UV radiation of the first (14) and of the second film (19) is a varnish chosen from the group comprising, alone or in mixture, urethane-acrylate, epoxy-acrylate, acrylic-acrylate and polyester-acrylate varnishes. Method according to one of claims 7 to 9, characterized in that the thickness of the second film (19) is substantially equal to 40 µm. Method according to one of Claims 7 to 10, characterized in that a step for holding the snow gliding board (1) is inserted vertically, between the step for applying (IV) the second film. (19) and the step of hardening (V) of the second film (19) under UV radiation, so as to obtain bumps in the form of drips substantially over the entire length of the gliding board. Method according to one of claims 7 to 11, characterized in that a step of decorating the exterior surface of the upper decoration and protection assembly is inserted, between the step of preparation (I) of said surface exterior of the upper decoration and protection assembly and the application step (II) of the first film (14).

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