JPH04231083A - Composing members of ski plate - Google Patents

Abstract

PURPOSE: To provide a ski which has mechanical characteristics and durability and excellent adaptability to casting, bonding, and outer decoration by forming a portion of one of members from a composition containing at least one kind of thermoplastic elastomer composed mainly of a polyamide and at least one kind of modified polyolefin. CONSTITUTION: A sliding bottom surface 1, an upper assembly 2 for decoration and for protection, a core 3, an inner member 4 for mechanical reinforcement, and a lower edge 5 are assembled together. A portion of at least one of the assembly members is made of a composition containing at least one kind of polyamide type thermoplastic elastomer and at least one kind of modified polyolefin selected from net or block copolymers. The modified polyolefin contains at least one kind of comonomer selected from among a vinyl ester of saturated carboxylic acid, unsaturated monocarboxylic acid, unsaturated dicarboxylic acid, their esters and salts, and an anhydride of saturated or unsaturated dicarboxylic acid.

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ski intended for use on a snowy surface, and particularly to a member forming part of the structure of the ski. These parts are made of thermoplastic elastomers (based on polyamides and modified polyolefins).
It is characterized by being a TPE) composition.

French Patent Application No. 2,523,143 discloses a copolymer containing ethylene (at least 35% by weight) and at least one vinyl ester as a main component, and containing 0.5% to 20% of heat-melting Compositions containing copolyetheresteramides that can be used as hot melt adhesives are described.

[0003] Japanese Patent Application No. 62-84141 discloses that 100 parts by weight of polyether ester amide;
A resin composition prepared by mixing 3 to 50 parts by weight of an ethylene/vinyl acetate copolymer grafted with vinyl chloride in a molten state is described.

[0004] European Patent Application No. 312,968 describes the use of "hot melt" adhesive films for assembling structural components of skis. The main components of these adhesive films are a thermoplastic polymer and an adhesion promoter such as silane or epoxy resin.

[0005] The object of the invention is primarily to ensure that certain of the parts have mechanical properties and improved durability due to their composition and also have good compatibility in terms of casting, gluing and exterior decoration. The goal is to manufacture skis that can be carried.

The ski according to the present invention can be manufactured by assembling a plurality of parts, and at least one of the parts used in this assembly is made at least partially of polyamide and at least one modified polyolefin. and the thermoplastic elastomer accounts for 50% or more (more preferably 60% or more) of the total weight of the thermoplastic elastomer and modified polyolefin. Features.

The thermoplastic elastomer (ie, TPE) containing polyamide as a main component may be a network copolymer or a block copolymer.

[0008] Network copolymers can be formed by random chaining of various components (monomers and/or prepolymers). On the other hand, applicant's preferred block copolymers are formed from blocks having chains of a certain length of their various constituents.

Copolymers based on polyamide are polyesteramides or polyethers.

Blocked polyether amides (ie polyether block amides) are produced, in particular, from the copolycondensation of reactive-terminated blocks of polyamide with reactive-terminated blocks of polyether. Among others: a) a block of polyamide at the end of the diamine chain;
copolycondensation with a block of polyoxyalkylene at the end of a dicarboxyl chain; b) copolycondensation of a block of polyamide at the end of a dicarboxyl chain with an aliphatic dihydroxy-α,Ω-polyoxyalkylene called polyether diol; copolycondensation with blocks of polyoxyalkylene at the ends of diamine chains obtained by cyanoethylation and hydrogenation of the blocks; c) particularly preferred by the applicant with blocks of polyamide at the ends of dicarboxyl chains; Copolycondensation with polyether diol called polyether ester amide.

Regarding the composition and production of such polyether ester amides, French Patent No. 2273021
No. 2401947.

The number average molecular weight of these polyamide blocks is usually between 500 and 10,000, more particularly between 600 and 5,000. The polyamide blocks of polyetheresteramide are preferably produced from aliphatic polyamides and/or amorphous polyamides or from polyamides obtained by polycondensation of their monomers.

The number average molecular weight of polyether is usually 20
between 0 and 6,000, more specifically between 600 and 3,
Between 000 and 000.

The polyether blocks most often consist of polytetramethylene glycol (PTMG), polyethylene glycol (PEG), and/or polypropylene glycol (PPG).

The intrinsic viscosity of the polyetheresteramide is advantageously between 0.8 and 2.05. This viscosity measurement was carried out at 100g in metacresol at 20°C.
of metacresol at an initial concentration containing 0.5 g of polymer.

[0016] The polyether ester amide is 5% by weight.
to 85% by weight of polyether and 95% to 15% by weight of polyamide, with 30% to 85% by weight of polyether and 70% by weight of polyamide.
Preferably it is from 15% by weight.

The applicant's preferred polyetheresteramides are those whose polyamide blocks are essentially PA-11, PA-12 and/or PA-12.1.
If a composition consisting of 2 and having antistatic properties is desired, it is preferred to use polyether ester amides whose polyether blocks consist essentially of polyethylene glycol (PEG).

By modified polyolefin is meant a copolymer having the following composition: i) ethylene monomer or non-olefin monomer, or optionally diolefin monomer; ii) saturated carboxyl At least one comonomer selected from vinyl esters of acids, unsaturated monocarboxylic acids and unsaturated dicarboxylic acids, and their esters, salts, and anhydrides of saturated or unsaturated dicarboxylic acids.

The olefin accounts for at least 50%, preferably 60% or more of the total weight of the copolymer, and the copolymer can be polymerized in the form of a network or a block, and the amount of the olefin in the modified polyolefin used in the present invention is It can have a linear structure or a branched structure.

By way of example, the following may be mentioned: (1) Copolymers of ethylene and vinyl acetate (EVA), maleated or non-maleated, which are particularly preferred by the applicant (maleic anhydride is (may be grafted or terpolymerized); the copolymer contains from 2 to 40% by weight of vinyl acetate, from 0 to 0.5% by weight of grafted maleic anhydride, or from 0 to 10% by weight, based on its total weight. % by weight of terpolymerized maleic anhydride; (2) a copolymer of ethylene and (meth)acrylic acid containing from 2 to 40% by weight of acid relative to the total weight of the copolymer;
(3) Ethylene, vinyl acetate, and if necessary (
A copolymer of meth)acrylic acid and/or alkyl(meth)acrylate (such as glycidyl methacrylate) containing 2 to 40% by weight of vinyl acetate and 0 to 9% by weight of (meth)acrylic acid and/or alkyl(meth)acrylate. (4) Ethylene, alkyl (meth)acrylate (methyl acrylate, ethyl, N-butyl, etc.), and
Preferably, the copolymer is a maleic anhydride copolymer containing 2 to 40% by weight of alkyl (meth)acrylate and 0 to 8% by weight of anhydride based on the total weight.

Similarly, a modified polyolefin is a copolymer block mainly composed of styrene (in particular, a block of polystyrene and a block of polybutadiene (SBS).
); a copolymer block consisting of a polystyrene block and a polyisoprene block (SIS); a copolymer block consisting of a polystyrene block and a poly(ethylene-butyl) block; The copolymers each have a molecular weight of 0.2 to 0.
8% by weight maleic anhydride and 30 to 55% for SBS
15 to 25 wt% styrene for SIS
of styrene and 13 to 32% by weight for SEBS.
Contains styrene.

[0022] The above composition can include various other ingredients such as fillers, pigments, dyes, or various additives.

Examples of fillers include glass fibers, carbon fibers, aramid fibers, talc, silica, kaolin, glass beads and glass fibers, ceramics, and aluminum powder, carbon calcium powder, manganese carbonate powder, ferrite powder, oxidized Examples include metals such as titanium, and metal salts and oxides.

Generally, 50% by weight based on the composition of the thermoplastic elastomer (strictly speaking, modified polyolefin)
up to (preferably up to 40% by weight) fillers can be included.

Examples of additives include anti-ultraviolet agents, mold release agents, impact modifiers, and the like.

These compositions can be prepared in particular by mixing. In many cases, each component, which is in the form of granules with an average diameter of 5 mm or less, is generally prepared in a molten state at a temperature of 190°C to 25°C.
Mix in a mixer at a temperature of 0°C.

[0027] It is easy to handle, has excellent mechanical properties (especially cold impact strength, abrasion resistance strength, and fracture strength),
Dimensional stability at temperatures from -20°C to 60°C,
Due to its excellent behavior over time and its excellent suitability for lamination and decoration, the compositions of the invention can be used alone in various forms (cast or extruded parts, films, foils, fibers). However, it can also be used to create composite products such as remolded products or coextruded products.

[0028] The cast or extruded product can be manufactured by known casting or extrusion techniques, and the temperature at which it is carried out is generally similar to the mixing temperature of the components constituting the composition of the present invention. Yes (usually ±20°C).

[0029] Parts used in the manufacture of skis include adhesive films and foils made of this composition. These parts can be manufactured by flat plate rolling extrusion method, plexage method
It can be produced by any known extrusion technique such as , blow extrusion, etc., and the extrusion temperature is usually 190°C to 250°C.

``Moder Encyclopedia of Plastics''
According to the Plastics Encyclopedia, the word ``film'' refers to a material with a flat cross section and a thickness of less than 250 μm, and the word ``sheet'' refers to a material with a thickness that is thicker, up to several millimeters. However, in the following description, for the sake of simplicity, regardless of which term is used, the term ``film'' will be used.
and "foil (sheet)".

The "film" obtained from the present composition can be used as it is, but it can also be used, for example, to produce a multilayer film by coextrusion or hot bonding.

Multilayer films which are particularly preferred by the applicant include: i) aliphatic polyamides (PA-6, PA-6.6, PA
ii) the present invention; A layer consisting of a composition according to the invention.

The method for producing these composite materials is carried out in two steps: first, a two-layer film is coextruded and then, for example by hot forming (thermoforming), this two-layer film is formed into a composition according to the invention. The layer is hot glued onto a support made of synthetic material on one side.

[0034] These composite materials are produced by a sublimation ink press transfer method, in particular as described in French Patent Application No. 2,596,286.
Decoration can be applied by the method described in the specification. The decoration of these composite materials can also be done by methods such as silk screen printing, paint or varnishing, heat transfer, stamp printing, ink jetting, laser printing, etc. Of course, these decorative techniques can be applied to any form in which the composition according to the invention (membrane, casting, fiber,
It is applicable even if you have taken the above).

[0035] This membrane consists mainly of rigid components of skis, especially reinforcing metal components (cables, iron plates, etc.) or wooden components, and epoxy resins and/or polyester resins, which are coated with or coated with said resins. It may also be applied to synthetic materials impregnated with.

[0036] The above two-layer film, an epoxy resin, and/or
Alternatively, composite materials consisting of a support impregnated with polyester and/or polyurethane and optionally decorated are suitable for producing the upper part of the ski according to the invention.

Compositions in the form of single-layer films can also be utilized as binders for coextrusion of multilayer films, allowing layers that are difficult or impossible to adhere to to be adhered.

[0038] Membrane mainly composed of polycarbonate (PC) and ethylene/vinyl alcohol copolymer (EVOH)
The use of the membrane of the composition according to the invention as a binder for the coextrusion of membranes based on .

The embodiments detailed below can be better understood with reference to the accompanying drawings.

As can be seen in FIG. 1, skis are generally
It consists of a combination of multiple members that independently achieve the required functions, such as mechanical resistance, protection, slippage, etc.

[0041] Therefore, recent skis generally have:
Core (core part) 3, metal upper and lower reinforcing members 4, and edge 5
, a bottom part 1 (i.e. the running surface), extending along the smallest side of the ski or not extending laterally;
It has an assembly of "mechanical" parts including a decorative and protective upper assembly of one or more layers.

FIG. 2 shows a specific example in which the composition of the present invention is applied to an upper member 2 for decoration and protection. In this particular embodiment, the component comprises an upper layer 21 of polyamide 11 or 12 or polyether block amide, which is resistant to ultraviolet light and thermal creep and can be easily sublimed, and a lower layer 21 of a composition according to the invention as described above. 22. The production of the two layers is advantageously carried out by a coextrusion method or by a hot plexi method. This member is then hot bonded to a top reinforcement impregnated with epoxy resin and/or polyester and/or polyurethane, as shown in FIG. The operating conditions and adhesion results are as shown in Examples I to VII below.

Example I: 1. 60 parts of polyether ester amide (A1) and 40 parts of maleated ethylene/vinyl acetate copolymer (B1) are mixed in a single screw extruder with the screw speed set at 150 rpm. The extrusion temperature was between 200°C and 250°C, and the extrusion flow rate was 2
It is set to 0 kg/h. At the exit of the die, the above composition obtained in the form of polymer filaments with an average particle size of about 3 mm, according to the ASTM D1238 standard, has a diameter of 2.16 mm.
It has a melt index (MI) of 1.31 measured at a temperature of 190° C. under a load of 1.3 kg. The polyether ester amide (A1) used was PA-12 (
Mn=5000) blocks are 88%, PTMG (B1
) (Mn=650) blocks constitute 12%. The maleated EVA used was 18% vinyl acetate,
Contains 0.27% maleic anhydride and has a melting temperature of 8
Vicat measured according to the D1525 standard at 6°C.
cat) point is 61°C. Table I shows: i) Shore hardness D (5s), measured according to the ISO 868 standard; ii) 2, measured according to the ASTM D790 standard.
Flexural modulus at 0°C, and from 20 to -20°C
iii) burst strength measured according to the ISO 34 standard (method B: burst perpendicular to injection direction); iv) notched Izod impact strength measured according to the ISO 180 standard; v) composition according to the ASTM D638 standard I. 1 and components A1 and B1, measured at -40°C. A coextrusion of a two-layer thin film (PA-11 and composition I.1) is then carried out. The conditions for composite extrusion are as follows: i) Extrusion temperature: PA-11: 210°C/230°C/240°C/
240℃I. 1:205℃/230℃/230
°C/230°C ii) Die temperature: 245°C iii) Rolling mill temperature: 50°C/35°C/50°C Two layers having the following composition are obtained at the exit of the die. a) PA-11 with a thickness of about 0.3 mm (Mn=2000
0) layer. b) Composition I. with a thickness of approximately 0.5 mm. 1 layer. Next, the above two-layer membrane was applied to a support (substrate) made of a woven fabric (glass woven fabric) impregnated with 30% bisphenol A-based epoxy resin in the presence of an MDI-type amine curing agent and a crosslinking accelerator. Hot glue. The two-layer film is placed in the mold at a thickness of about 1
It is applied to the substrate at a temperature of 50° C. and a pressure of 8 kg/cm 3 and then cooled before demolding. The degree of adhesion of the two-layer membrane to the epoxy substrate is measured after 72 hours in distilled water according to the NFT76-112 standard. The properties of the materials are summarized in Table I. The adhesion results summarized in Table II are average values calculated from the results of five tests. 2. I. Under the same conditions as 1, 90 parts of I. 1 and 10 parts of glass fibers having an average length of 4 mm to form a composition (I.
2). This composition is then applied to I. Co-extrusion with PA-11 having the same properties as 1. The structure of the resulting two-layer film is as follows. i) A layer of PA-11 with a thickness of approximately 0.3 mm. ii) Composition I. having a thickness of about 0.5 mm. 2 layers. Next, this two-layer film was coated with I. Adhere to the epoxy base under the same conditions as 1. The adhesion results are summarized in Table II. 3. I
．． Under the same conditions as 1, 90 parts of I. 1 and 10 parts of glass fibers having an average length of 4 mm to form a composition (I.3). This composition is then applied to I. PA- with the same characteristics as 1
Co-extrusion molding with 11. The structure of the resulting two-layer film is as follows. i) A layer of PA-11 with a thickness of approximately 0.3 mm. ii) Composition I. having a thickness of about 0.5 mm. 3 layers. Next, this two-layer film was coated with I. Adhere to the epoxy base under the same conditions as 1. The adhesion results are summarized in Table II. 4. I
．． Under the same conditions as 1, 80 parts of I. 1 and 20 parts of Ca
CO3 is mixed to obtain composition (I.4). This composition is then applied to I. Co-extrusion with PA-11 having the same properties as 1. The structure of the two-layer film obtained is as follows. i) A layer of PA-11 with a thickness of approximately 0.3 mm. ii) Composition I. having a thickness of approximately 0.5 mm. 4 layers.

Example II: I. Under the same conditions as in 1, 60 parts of polyether ester amide (A1) and 40 parts of maleated ethylene/
Mix vinyl acetate copolymer (B2) (containing 28% vinyl acetate and 0.2% maleic anhydride) (melting point: 75°C
, Vicat point: 57°C). Then, the obtained composition (II
) (MI=1.89) with PA-11 followed by I. Adhere to the epoxy base under the same conditions as 1. The adhesion results are summarized in Table II.

Example III: I. Under the same conditions as in 1, 60 parts of polyether ester amide (A1) and 40 parts of ethylene/vinyl acetate copolymer (B3) (containing 28% vinyl acetate) (MI = 3)
Mix. Then, the obtained composition (III) (M
I=3.5) with PA-11, then I. Adhere to the epoxy base under the same conditions as 1. The adhesion results are summarized in Table II.

Example IV (for comparison): For comparison, according to European Patent Application No. 312,968, I
．． Under the same conditions as in 1, 50 parts of polyether ester amide (A2), 1 part of silane, 19 parts of talc, 3
Mix 0 parts of tacky resin. Polyetheresteramide (A2) is 50% PA-12 (Mn=2000
) block and 50% PTMG (Mn=2000)
It consists of blocks. The resulting composition (III) (
MI=4) was coextruded with PA-11, then I. It is adhered to an epoxy substrate under the same conditions as 1. The adhesion results are summarized in Table II.

Example V: I. Under the same conditions as 1, polyether ester amide (
Mix 80 parts of A1) and 20 parts of maleated SBS (B4). Maleated SBS contains 30% styrene and 0
．． Styrene with 2% maleic anhydride and MI=4/
It is a copolymer block of butadiene-1,3/styrene. The resulting composition (IV) was then coextruded with PA-11, followed by I. Adhere to the epoxy base under the same conditions as 1.

Example VI: Composition (III) was mixed with EVOH (containing 40% ethylene,
d=1.41, MI=3.5, melting point: 164° C.). The conditions for coextrusion molding are as follows. i) Extrusion temperature: EVOH: 200℃/220℃/235℃
III: 200℃/210℃/
220°C/230°C ii) Die temperature: 220°C iii) Rolling mill temperature: 50°C/35°C/50°C Two layers having the following configuration are obtained at the exit of the die. a) EVOH with a thickness of about 0.3 mm (Mn=20000
) layers. b) A layer of composition III with a thickness of approximately 0.8 mm.

Example VII: I. Under the same conditions as 1, polyether ester amide (
Mix 70 parts of A4) and 30 parts of maleated EVA (B7). Polyether ester amide (A4) is P
A-12 (Mn=4000) block 80% and PT
Consists of 20% blocks of MG (Mn=1000). Maleated EVA (B7) contains 14% vinyl acetate;
Contains 0.35% maleic anhydride. The melting temperature is 9
At 4°C, the Vicat point is 71°C. The resulting composition (V
II) is utilized as a binder for the coextrusion of EVOH and polycarbonate crystals. E used
The characteristics of the VOH are the same as those used in Example VI. Polycarbonate crystal is sold by General Electric Company under the trade name "LEXAN154." The conditions for coextrusion are as follows. i) Extrusion temperature: EVOH: 190°C/2
00℃/205℃/210℃ VII: 18
5℃/190℃/190℃/190℃ ii) PC crystal temperature: 270℃/275℃/2
70℃/270℃ iii) Dice temperature: 250℃
iv) Rolling mill temperature: 45℃/50℃
/50°C At the exit of the extrusion die, three layers having the following composition are obtained. i) A layer of EVOH approximately 0.3 mm thick. ii) a layer of composition VII with a thickness of approximately 0.1 mm. iii) A layer of PC crystal approximately 0.3 mm thick. The edge of each layer is pulled (pulling speed = 100 mm/min) and the peeling is measured on a 15 mm wide sample at 180°C. The peel measurement result is 910 per g/10mm.

[Table 1]

[Table 2]

[0050] In the case of skis manufactured by injection molding,
It is advantageous to use the membrane according to the invention as an adhesive membrane, in particular as a tubular covering membrane 6 as shown in FIG. In this case, the components of the ski are placed in a mold, and a thermosetting foaming agent is injected into the tubular coating. The expansion of the foaming agent within the coating compresses the components of the ski (particularly the reinforcement 4). Furthermore, this expansion reaction is accompanied by an exothermic reaction, which usually results in sufficient adhesion of the membrane onto the compressed ski components.

Such a manufacturing method is described in French Patent Application No. 8915665 filed by the applicant.

The composition according to the invention also allows the production of cast inserts such as tailpieces 7 and top bends 8. Generally, these parts are cast and may be filled with, for example, glass fibers. These parts (particularly the top bend 8) can be removably mounted on the ski body, as shown in FIG.

[0053] Finally, an internal cushioning material of the composition according to the invention can be inserted into the structure of the ski. Structures that can incorporate these members are described in French Patent Nos. 2611518, 2615404 and 2615405.
No. 2615406.

FIG. 5 shows a cushioning material 9 made of the composition of the present invention.
A non-limiting embodiment is shown in which it is located laterally between the side surface of the core 3 and the sloped side surface of the upper part of the ski 2.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the detailed structure of a ski.

FIG. 2 is a cross-sectional view of a ski with a simplified structure according to one particular embodiment of the invention;

FIG. 3 is a detailed cross-sectional view of a ski according to another particular embodiment;

FIG. 4 is an exploded perspective view of the ski.

FIG. 5 is a cross-sectional view of a ski according to a further embodiment;

[Explanation of symbols]

1 Bottom surface for sliding 2 Upper assembly (assembly) 3 Core part 4 Internal members for mechanical reinforcement 5 Lower edge 7 Tailpiece 8 Top bend 9 Internal cushioning member 21 Upper layer 22 Lower layer

Claims (18)

[Claims] 1. A plurality of parts, including a sliding bottom (1), a decorative and protective upper assembly (2), a core (3), an internal mechanical reinforcement member (4) and a lower edge (5). A ski constructed by assembling components, characterized in that at least one of the assembly components consists, at least in part, of a composition comprising: i) at least one type of polyamide thermoplastic elastomer; and ii) at least one modified polyolefin selected from network or block copolymers containing the following substances: a) vinyl ester of saturated carboxylic acid, unsaturated monocarboxylic acid , unsaturated dicarboxylic acids, their esters and salts, anhydrides of saturated or unsaturated dicarboxylic acids; b) at least 50%, preferably at least 60% of the total weight of said copolymer; some olefin; or c) 0
．． Styrene-based copolymer block containing 2 to 0.8% by weight of maleic anhydride. 2. A ski component according to claim 1, wherein the thermoplastic elastomer accounts for at least 50% of the total weight of the thermoplastic elastomer and the modified polyolefin. 3. Ski component according to claim 2, characterized in that said thermoplastic elastomer accounts for at least 60% of the total weight of said thermoplastic elastomer and said modified polyolefin. 4. A component of a ski according to claim 1, wherein the thermoplastic polyamide elastomer is polyetheramide. 5. The ski component according to claim 4, wherein the polyamide thermoplastic elastomer is polyetheresteramide. 6. The modified polyolefin is selected from the following:
or component parts of skis according to any one of 5: i)
Copolymers of ethylene and vinyl acetate (including maleated and non-maleated ones); ii) Copolymers of ethylene and (meth)acrylic acid; ii
i) Ethylene, vinyl acetate, and optionally (
copolymers of meth)acrylic acid and/or alkyl (meth)acrylates; iv) maleated SBS, SIS, and SEBS
. 7. The ski component according to claim 1, wherein the modified polyolefin is a copolymer of ethylene and alkyl (meth)acrylate. 8. The ski component according to claim 7, wherein the modified polyolefin is a copolymer of ethylene and maleic anhydride. 9. Ski component according to claim 7, characterized in that the alkyl acrylate is ethyl acrylate. 10. The composition contains additives and/or pigments or colorants, and/or fillers in an amount not exceeding 50% by weight based on the thermoplastic elastomer and modified polyolefin based on polyamide. A component of a ski according to any one of claims 1 to 9, characterized in that: 11. A ski component according to claim 10, characterized in that the content of said filler does not exceed 40% by weight. 12. A component of a ski according to claim 1, wherein the component at least partially composed of the mixed composition is a stickable single-layer film or multi-layer film. 13. Ski structure according to claim 12, characterized in that said single-layer film or multi-layer film is hot-bonded onto a substrate impregnated with an epoxy resin and/or a polyester resin and/or a polyurethane resin. Element. 14. The member is a two-layer film consisting of an aliphatic polyamide layer (21) and a mixed composition layer (22) adhered thereon. Components of skis. 15. The member is a two-layer film comprising a polyether block amide layer (21) and a mixed composition layer (22) adhered thereon. Components of skis. 16. Ski component according to claim 14, characterized in that the two-layer membrane constitutes a decorative and protective upper part. 17. Ski according to claim 1, characterized in that the component made of the mixed composition is a cast insert, such as a tailpiece (7) or a top bend (8). Components. 18. A component of a ski according to claim 1, characterized in that the component made of the mixed composition is a cushioning internal component (9).