FR2823126A1 - METHOD FOR MANUFACTURING A SNOW SLIDING BOARD WITH A DECORATING AND PROTECTIVE ELEMENT, POLYMERIC FILM, DECORATING AND PROTECTING ELEMENT AND SNOW SLIDING BOARD THUS OBTAINED - Google Patents

Abstract

A cut out (19) is formed according to a predetermined pattern, in the upper layers. Inserts (13) of appropriate dimensions are then located in the recess. A polymer barrier film (21) exceeding the size of the cut out is then added, to seal between insert and upper layers (6), blocking adhesive from reaching other surfaces of the layers, during later stages when the ski is molded. <??>An Independent claim is included for a corresponding: polymer film, protective decoration and ski.

Description

28231 26

  PRO AID TO MANUFACTURE A SNOW SLIDE BOARD

  WITH A DECORATION AND PROTECTION ELEMENT, ILM

  POLYMER, ELEMENT OF DECORATION AND PROTECTION AND

  The present invention relates to a method of manufacturing a gliding board.

  on ncige with an element of decoration and protection.

  The present invention also relates to a polymer film intended for the manufacture

  0 of a snowboard on ncige.

  The present invention also relates to a decorative and protective element intended to form the decoration and the upper protection of a board for sliding on snow. The present invention finally relates to a snow gliding board obtained

  according to the manufacturing process.

  The decoration process is an important phase in the manufacture of a snow gliding board, such as an alpine ski, a surfboard, a monoski, ... The decoration and protection element intended to form the decoration and the top protection must be of high quality, durable, resistant to external aggressions and inexpensive. This element must indeed resist scratches, W. at low temperatures, humidity, cleaning solvents, In addition, it may be particularly interesting to insert in the decoration and protection element one or several pieces of a material having 2s different properties, so that the user can easily maintain his board with or without his gloves, without feeling cold or having a smooth and slippery appearance

on the upper surface.

  State of the art We know from documents FR-2,313,953 and FR2,366,039, a board for gliding on a ncige comprising an element of decoration and protection, intended to form the decoration and the upper protection? with additional segments cut out, in different colors and positioned one after the other in the direction

  longitudinal with respect to the gliding board.

  In the corresponding manufacturing process, the different cut segments are applied to a lining in the form of a mesh arranged at the level of the

  joint between the segments and allowing a pre-assembly of the upper element.

  s The main drawback of this process lies in the absence of reliable and leaktight seals between the additional segments and the rest of the decorative and protective element. This will lead in particular to adhesive leaks during the subsequent stages.

molding the board.

  Also known from document FR-2,740,981, a method of manufacturing a board for gliding on snow, which in particular comprises a step consisting in producing an element for decorating and protecting the board. This element has at least one layer which is decorated or must be decorated on at least one of

its faces.

  This process consists in producing at least one window by cutting out the upper layer, then in locally bringing a piece of transparent or translacid material, on the side of the internal face of the layer, at the location of the window to cover it.

  fully. Finally, the insert is secured to the upper layer.

  The main drawback of the method is that due to the overlap of the window and of the insert, the material of the part must be compatible and must be able to stick with the material constituting the upper layer. In addition, in order to ensure perfect cohesion, the material of the insert must be able to stick easily with the material or materials constituting the rest of the underlying structure of the board. Summary of the invention A first problem consists in implementing a method of manufacturing a snow gliding board with an upper protective and decorative element, comprising one or more inserts made of a material different from those constituting the element.

  superior protection and decoration.

  A second problem is to implement a method of manufacturing a board for gliding on ncige making it possible to avoid reassemblies, leaks and burrs.

  of adhesive during the subsequent stages of molding the board.

  A third problem consists in providing a board for gliding over snow with a means having sealing properties against any liquid or pasty adhesive used for

  the subsequent stages of molding the board.

  A fourth problem is to develop a method incorporating a means which is compatible with adhesives of the epoxy resin or polyurethane foam type.

in their expansion phase.

  A fifth problem is to design a means intended for a board for gliding on snow developing adhesion properties both with the upper sheet or sheets constituting the upper decorative and protective element and the

o inserts.

  A sixth problem posed is to make a board for gliding on snow with one or more inserts made of a material allowing the user to take and handle

his board without inconvenience.

  A method of manufacturing a board for gliding on snow, comprises in particular a step consisting in producing a decorative and protective element, intended to form the decoration and the upper protection of the board for gliding on snow, having at least one sheet. upper made of at least one material or of a superposition of at least one material, said upper sheet being decorated or to be decorated on

at least one of its faces.

  In accordance with a first aspect of the invention, in this step: A at least one part cut out according to a determined pattern of the upper sheet or sheets is cleaned; To is then positioned, in the cut part (s) of the upper sheet (s) 2s, one or more inserts of dimensions smaller than or equal to those of the cut part (s); and each insert is covered with one or more portions of a barrier polymer film having dimensions greater than those of the cut part or parts, in order to ensure sealing between the insert (s) and the upper sheet (s) to prevent passage of an adhesive towards at least one other of the faces of the

  sheets, during the subsequent stages of molding the snow gliding board.

  In accordance with a second aspect of the present invention, in this step: at least one part cut out according to a determined pattern of the upper sheet or sheets; To then the cut upper sheet (s) is positioned by placing the cut part (s) on one or more portions of barrier polymer film having dimensions greater than those of the cut part (s), to prevent the passage of an adhesive towards at least another of the faces of the sheet or sheets, during the subsequent stages of molding the snow gliding board; and one or more or more inserts of dimensions smaller than or equal to those of the cut part or parts are positioned in the cut part or parts of the upper sheet or sheets. A so lidaris ation of the upper sheet (s), the insert (s) and the barrier polymer film (s) can be produced by hot pressing. Preferably, the barrier polymer film is a three-layer film. The three-layer polymer film then favorably comprises: - a first layer of a hot-melt adhesive; - A central layer of a thermoplastic polymer having sealing properties against any liquid or pasty adhesive of the epoxy resin type, or polyurethane foams in their expansion phase; and - a third layer of heat-adhesive adhesive, similar to the adhesive

  hot melt used for the first layer.

  Advantageously, the first and third layers of the film have a

  thickness substantially between 10 μm and 40 μm, preferably equal to 25 μm.

  Advantageously, the central layer has a thickness substantially understood

  between 45 1lm and 100 m, preferably equal to 70 m.

  The thermoplastic polymer having sealing properties against any liquid or pasty adhesive of the central layer can be a polyurethane. The hot melt adhesive of the first and third layers has a softening point preferably substantially less than or equal to 80 C. The thermoplastic polyurethane of the central layer has a softening point preferably substantially higher

or equal to 150 C.

  The hot-melt adhesive may be a copolyamide compatible with adhesives of the epoxy resin type, or polyurethane foams in their expansion phase. The hot-melt adhesive may be a copolyamide developing adhesion properties with the or

  the top sheets and the insert (s).

  The material used as an insert will advantageously have a hardness less than or equal to 85 Shore A, and a high coefficient of friction to give it

soft touch qualities.

  In accordance with a third aspect of the invention, a polymer film is intended for the manufacture of a snow gliding board according to the method described above. According to a fourth aspect of the invention, a decorative and protective element is intended for the manufacture of a snow gliding board in accordance with

process described above.

  According to a fifth aspect of the invention, a board for gliding on snow is characterized by the use of a decorative and protective element produced in accordance with the method described above. The decorative and protective element is secured during molding to the other constituent materials of the structure of the snow gliding board using epoxy resins, or polyurethane foams in their

expansion phase.

  According to a sixth aspect of the invention, a snow gliding board has a decorative and protective element, intended to form the decoration and the upper protection of the snow gliding board, having at least one upper sheet made of '' at least one material or a superposition of at least one material. The upper sheet being decorated or to be decorated on at least one of its faces, comprises at least one insert, positioned in at least one cut part of the upper sheet or sheets, and having a hardness less than or equal to 85 Shore A , and one

  high coefficient of friction to give it soft touch qualities.

Description of the drawings

  The invention will be well understood and its various advantages and different

  characteristics will emerge better during the following description, from the example not

  limitative embodiment, in reference to the appended schematic drawings, in which: - Figure l represents a top view of a ski whose decoration and protection element comprises several inserts; - Figure 2 shows a cross section along the plane II - II of Figure l; - Figure 3 shows a partial cross section of the ski along the plane III - III s of Figure l; - Figure 4 shows a partial cross section of a second type of ski whose decoration and protection element comprises insert parts; - Figure 5 shows a partial cross section of a third type of ski whose decoration and protection element comprises insert parts; 0 - Figure 6 shows a partial block diagram of the step consisting in making a decorative and protective element; and

  - Figure 6A shows an enlargement of detail A in Figure 6.

detailed description

  t5 A board for gliding on snow, for example an alpine ski l, comprises a gliding sole 2 bordered by two lateral edges 3 and 4. The ski l comprises a decoration and protection element 6 forming the decoration and the upper protection of the ski. This decorative and protective element 6 itself consists of one or more upper sheets. In the case where there is a top sheet, it is itself made of one or more materials, in particular of the polymer type. In the case where there are several upper sheets, these are formed by the superposition of a

  single material or by the superposition of an alternation of different materials.

  In the case of a "Dualtec" type ski (see more particularly FIGS. 2 and 3), the ski comprises two lateral side edges 7 and 8, the decoration and

  2s protection 6 then forming a partial shell.

  In the case of a so-called "shell" ski (see Figure 4), the side edges are absent,

  the decorative and protective element 6 then forming an upper envelope.

  In the case of a so-called "rectangular section" ski (see FIG. 5), the edges 7 and 8 extend from the lateral edges 3 and 4 respectively, up to the element of

  decoration and protection 6 which is flat.

  According to the invention, the decorative and protective element 6 comprises at least one insert positioned on its upper surface. As an indicative example, one can have two inserts 9 and l 1 placed at the heel area 12. One can also

  have a single insert 13 positioned towards the spatula 14.

  In The two inserts 9 and 11, as well as the insert 13, are, in the proposed embodiment, symmetrically arranged with respect to the median longitudinal axis of the ski. An asymmetrical arrangement would remain within the scope of the invention. The inserts shown 9, 11 and 13 have, seen from above, an oval shape. However, all the possibilities of

  shape and positioning remain possible, without departing from the scope of the invention.

  To allow easy handling of the ski, with or without gloves, the user

  will look for both a feeling of warmth and a correct function to grip.

  This is obtained with a specific material having a hardness less than or equal to o 85 Shore A. In addition, this material has a high coefficient of friction in order for it

  confer qualities of soft touch (also called "soft" touch).

  Materials of particular interest for the inserts are block copolymer styrenes. Styrene-Butadiene Rubber materials, of which the

  Santoprene have given particularly interesting results.

  For example, the thickness of the inserts is between 0.2 and 2 mm, from

preferably between 0.5 and 1 mm.

  The decorative and protective element 6, itself consists, for example, of a mixture of Styrene-Acrylonitrile (SAN) and of thermoplastic polyurethane (TPU). This mixture is possibly transparent, which allows a decoration of the internal face, which thus protected by the thickness of the decorative and protective element, proves to be more durable. Depending on the case, the top sheet or sheets constituting this decorative and protective element are decorated on at least

one of their faces.

  On the upper surface of the sliding sole 2, a first fibrous reinforcement 16 is positioned, for example of the laminated type of glass fiber impregnated with epoxy resin. Under the decorative and protective element 6, is also positioned a fibrous reinforcement auke 17, also for example of the laminated type of glass fiber impregnated with epoxy resin. The ski finally comprises a central core 18 which may possibly have a

  or more metallic type reinforcements.

  In accordance with a more particularly advantageous production method (see FIG. 6), a step is provided for forming the insert (s). This stage is divided

itself in sub-steps.

  In the first sub-step, at least one part is spared by cutting according to

28231 26

  a specific pattern of the upper leaf (s). The pattern can be delimited, for example that shown in Figure 1, or can truly constitute an entire part, as for example according to the document FR-2.313.953. This cut-out part 19 can also be positioned laterally in the case of the "hull>" ski (see FIG. 4). In a second substep, one or more inserts 13 are positioned in the cut-out part or parts 19, according to the arrow P. The insert (s) 13 may have dimensions equal to those of the cut-out portion 19, so that there will be no gap between the upper sheet (s). Another possibility is that the insert (s) have dimensions smaller than those of the cut part, revealing a

  or several intervals between the insert (s) and the sheet (s).

  In a third sub-step, each of the inserts 13 is covered along the arrow R with one or more portions of a film of polymer material 21. In this first example of the production process, the upper decoration element and protective 6 is

  positioned upside down at the bottom of a mold.

  In a second variant embodiment, the step of producing the upper decoration and protection element 6 comprises the first sub-step of cutting out

  of the upper leaf (s) according to a determined pattern.

  In a second sub-step, the upper sheet or sheets cut out are positioned on one or more portions of polymer film with the cut parts

  directly placed at the level of the polymer film portions.

  Finally, in a third sub-step, one or more inserts can be placed in the cut part or parts, which may also have dimensions less than or equal to

  those of the cut part (s).

  The polymer film will play several roles. First of all, this film is intended to form a physical barrier in order to prevent the creep of the epoxy resin which coats under the decorative and protective element. This film will also act as a chemical barrier, so

  prevent the epoxy resin from reaching the styrenic material constituting the insert (s).

  In addition, this film allows the insert (s) 13 to be secured to the upper protection and decoration element 6. Next, this film 21 adheres by its projecting parts to

  the underside of the decorative and protective element 6.

  To do this, this film is a three-layer film. The first upper layer 22 has a thickness substantially between 10 and 40 μm and will preferably be equal to 25 m. The central layer will have a thickness substantially between 45 and 100 μm, and preferably will be equal to 70 μm. The lower layer 24 will also have a thickness substantially equivalent to that of the upper layer 22, that is to say between 10 and 40 μm, and preferably equal to 25 μm. The upper layer is made of a polymer material having a softening point substantially less than or equal to 80 C. In addition, this upper layer 22 is a hot-melt adhesive, for example a hot-melt copolyamide. The

  copolyamide is compatible with the styrenic material constituting the insert (s) 13.

  o The third lower layer 24 is also a hot-melt adhesive of the copolyamide type. The copolyamides retained are compatible either with adhesives of the epoxy resin type in the case where the ski is molded by superposition of its constituent elements including the central core 18 already manufactured, or with polyurethane foams in their expansion phase in the case where the ski is molded simultaneously

  s by injection of the central core 18.

  The material constituting the central layer 23 has a high softening point, that is to say here greater than 1 50 C. A particularly interesting material is polyurethane which allows both excellent lamination with the upper copolyamide film 22 and the lower copolyamide film 24, and also forms an excellent barrier to epoxy resins or polyurethane foams in their phases

  expansion, during subsequent stages of molding and / or injection of the central core 18.

  Note that the film 21 can be inserted into the intervals formed between the element

  upper decoration and protection 6 and the insert (s) 13 with smaller dimensions.

  After this stage of production of the upper decorative and protective element 6, constituting the intermediate element, the ski manufacturing process will continue with the positioning in a mold of this element 6, then by the molding of the ski itself .

  The present invention is not limited to the embodiments described and illustrated.

  Many modifications can be made, without going outside the scope

  defined by the scope of the set of claims.

28231 26

Claims (15)

  1. A method of manufacturing a board for gliding on snow, comprising in particular a step consisting in producing a decorative and protective element (6), intended to form the decoration and the upper protection of the board for gliding on snow, having at least one upper sheet made of at least one material or of a superposition of at least one material, said upper sheet being decorated or having to be decorated on at least one of its faces, step according to which: oa) at least one part (19) cut out according to a determined pattern of the upper sheet or sheets is cleaned; b) next, in the cut part (s) (19) of the upper sheet (s), one or more inserts (9, 11, 13) of dimensions less than or equal to those of the cut part (s) (19) ; and sc) each insert (9, 11, 13) is covered with one or more portions of a barrier polymer film (21) having dimensions greater than those of the cut part or parts (19), in order to ensure the sealing between the insert (s) (9, 11, 13) and the upper sheet (s) (6) to prevent the passage of an adhesive towards at least one other of the faces of the sheet (s), during the steps   subsequent molding of the gliding board on ncige.   2. Method for manufacturing a board for gliding on snow (1), comprising in particular a step consisting in producing a decoration and protection element (6), intended to form the decoration and the upper protection of the board for gliding s on snow, having at least one upper sheet made of at least one material or of a superposition of at least one material, said upper sheet being decorated or having to be decorated on at least one of its faces, step according to which : a) cleaning at least a part (19) cut according to a determined pattern of the upper sheet or sheets; b) the cut upper sheet or sheets are then positioned by placing the cut part or parts on one or more portions of barrier polymer film (21) having dimensions greater than those of the cut part or parts (19), to prevent passage of an adhesive towards at least one other of the faces of the sheet or sheets, during the subsequent stages of molding the snow gliding board; and c) one or more inserts (9, 11, 13) of dimensions less than or equal to those are positioned in the cut part or parts of the upper sheet or sheets.   of the cut part (s) (19).   3. Method according to claim 1 or 2, characterized in that one carries out a securing of the upper sheet or sheets (6), or the insert (s) (9, 11,13) and the   0 or barrier polymer films (21), by hot pressing.   4. Method according to claim 3, characterized in that the barrier polymer film (21) is a three-layer film.   5. Method according to claim 4, characterized in that the three-layer polymer filrn (21) comprises: - a first layer (22) of a hot-melt adhesive; - A central layer (23) of a thermoplastic polymer having sealing properties against any liquid or pasty adhesive such as epoxy resins or polyurethane foams in their expansion phase; and - a third layer (24) made of a hot-melt adhesive, similar to the adhesive   thermoLusible used for the first layer.   6. Method according to claim 5, characterized in that the thermoplastic polymer having sealing properties to any liquid or pasty adhesive of the layer central is a polyurethane.   7. Method according to claim 5 or 6, characterized in that the hot-melt adhesive of the first and third layers (22, 24) has a softening point substantially less than or equal to 80 C, and in that the thermoplastic polyurethane of the central layer (23) has a softening point   substantially greater than or equal to 1 50 C.   8. Method according to one of claims 5 to 7, characterized in that the adhesive   hot melt is a copolyamide compatible with resin type adbésives   epoxy or polyurethane foams in their expansion phase. s   9. Method according to one of claims 5 to 7 characterized in that the adhesive   hot-melt is a copolyamide developing adhesion properties with the or   the upper leaves and the insert (s) (9, 11, 13).   lo 10. Method according to one of claims 4 to 9, characterized in that the first and   third layers (22, 24) of the film (21) have a thickness substantially between 10 m and 40 m, preferably equal to 25, μm, and in that the central layer (23) has a thickness substantially between 45, μm and   m, preferably equal to 70 1lm.   11. Method according to one of the preceding claims, characterized in that the   material used as an insert (9,11,13) has a hardness less than or equal to Shore A, and a high coefficient of friction to give it qualities of soft touch.   12. Polymeric film (21) intended for the manufacture of a snow gliding board   according to the method according to one of claims 1 to 11.   13. Decorative and protective element (6) intended for the manufacture of a board   2s slides on snow according to the method according to one of claims 1 to 11.   14. Board for sliding on ncige, characterized in that it uses a decorative and protective element (6) produced in accordance with the method according to one of claims 1 to 11.   15. Snowboard on ncige according to claim 14, characterized in that the decorative and protective element (6) is secured during molding with other materials constituting the structure of the snowboard using   epoxy resins or polyurethane foams in their expansion phase.   l 6. Snow gliding board having a decorative and protective element (6), intended to form the decoration and the upper protection, having at least one upper sheet made of at least one material or of a superposition of at least one material, said upper sheet being decorated or to be decorated on at least one of its faces, characterized in that it comprises at least one insert (9, ll, 13), positioned in at least one cut part (l9) of the upper sheet (s) l0 (6), and having a hardness less than or equal to 85 Shore A, and a strong   friction coefficient to give it soft touch qualities. i5 DEPOSITOR: SKIS ROSSIGNOL S.A.