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EP0492498B1 - Ski enthaltend flächenförmige Platten oder Bänder aus einem faserverstärkten Werkstoff - Google Patents

Ski enthaltend flächenförmige Platten oder Bänder aus einem faserverstärkten Werkstoff Download PDF

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Publication number
EP0492498B1
EP0492498B1 EP91121934A EP91121934A EP0492498B1 EP 0492498 B1 EP0492498 B1 EP 0492498B1 EP 91121934 A EP91121934 A EP 91121934A EP 91121934 A EP91121934 A EP 91121934A EP 0492498 B1 EP0492498 B1 EP 0492498B1
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EP
European Patent Office
Prior art keywords
ski
fiber reinforced
fiber
sheetlike
reinforced material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91121934A
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German (de)
English (en)
French (fr)
Other versions
EP0492498A1 (de
Inventor
Georg Michael Lorenz
Walter Dr. Fester
Ulrich Schuster
Erhard Dr. Leicht
Ralph Schäfer
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.)
Hoechst AG
Reitex Hydraulik GmbH
Original Assignee
Hoechst AG
Reitex Hydraulik GmbH
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Publication date
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Publication of EP0492498A1 publication Critical patent/EP0492498A1/de
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Publication of EP0492498B1 publication Critical patent/EP0492498B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • A63C5/126—Structure of the core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/902—High modulus filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y10T428/24091—Strand or strand-portions with additional layer[s]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y10T428/24091—Strand or strand-portions with additional layer[s]
    • Y10T428/24099—On each side of strands or strand-portions
    • Y10T428/24107—On each side of strands or strand-portions including mechanically interengaged strands, strand-portions or strand-like strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24124—Fibers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2904—Staple length fiber
    • Y10T428/2909—Nonlinear [e.g., crimped, coiled, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3382—Including a free metal or alloy constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3472—Woven fabric including an additional woven fabric layer
    • Y10T442/3528—Three or more fabric layers
    • Y10T442/3569—Woven fabric layers impregnated with a thermosetting resin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3472—Woven fabric including an additional woven fabric layer
    • Y10T442/3528—Three or more fabric layers
    • Y10T442/3569—Woven fabric layers impregnated with a thermosetting resin
    • Y10T442/3577—Phenolic resin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/475—Including a free metal or alloy constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/654—Including a free metal or alloy constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/671—Multiple nonwoven fabric layers composed of the same polymeric strand or fiber material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/695—Including a wood containing layer

Definitions

  • the present invention relates to a ski which contains sheet-like plates or bands made of a fiber-reinforced material which consists of a sheet-like textile material and a thermosetting resin.
  • Modern skis such as alpine or cross-country skis, are usually made in layers.
  • a wide variety of materials are generally used to produce these skis, which are usually attached around a so-called core.
  • the core is made of wood, fiber-reinforced plastic or foamed plastic, for example.
  • plastic layers or plates or metal plates are generally attached, which, in the case of a shock-like load, e.g. the ski is compressed under the weight of the skier between two uneven ground - depending on the position in relation to the core - pressed together (compression straps) or pulled apart (tension straps). This causes the ski to return to its original shape.
  • the outsole with the steel edges is usually located under the tension belts.
  • Above the pressure belts which are intended to protect the core in conventional skis, there is generally an upper surface which is primarily intended for decorative purposes.
  • the sandwich construction has proven to be cheap.
  • the load-bearing parts of the skis are put on top of each other in layers and glued together by applying a vacuum or applying pressure.
  • Glass fiber or carbon fiber reinforced composite materials based on epoxy resin are usually used as plastic layers above and below the core. It has been shown that such plastic layers are not easily covered with a top covering are coated. Usually you have to pretreat the top with a primer to apply the top layer.
  • such composite materials are relatively inflexible because they have high tensile strengths and elastic moduli. This has the consequence, among other things, that the vibration damping of the ski construction often leaves something to be desired after a shock-like load and that single-fiber tears can result.
  • a method for producing fiber-reinforced composites is known from FR-A-2,332,129.
  • a ski is known from US-A-4,556,237 which has a fiber-reinforced rod.
  • the use of polyacrylonitrile fibers as reinforcing material is not disclosed in this document.
  • the present invention thus relates to a ski, comprising sheet-like plates or bands made of a fiber-reinforced material, which consists of a sheet-like textile material and a thermosetting resin, the fiber-reinforced material having a fiber content of 30 to 70% by weight and the fiber material contained therein at least 30% consists of polyacrylonitrile fibers.
  • the ski according to the invention is distinguished from conventional skis in terms of production method and properties by a number of surprising advantages.
  • the flat sheets or strips can be glued to the other materials used.
  • the ski according to the invention is characterized by high wear resistance, good elasticity and, as a result, good vibration behavior (vibration damping), low weight and, as a result, by a low mass moment of inertia, and by good temperature properties. Furthermore, the formation of splicing fiber ends in the event of mechanical damage to the ski is avoided, so that the risk of damage to sports clothing is greatly reduced.
  • the fiber-reinforced used to manufacture the ski according to the invention consists essentially of a flat textile material and a thermosetting resin and is characterized in that it has a fiber content of 30 to 70% by weight, preferably 40 to 60% by weight, in particular 45 to 55% by weight, and that the fiber material contained therein consists of at least 30%, preferably at least 50%, in particular at least 80% of polyacrylonitrile fibers.
  • all known crosslinkable, ie curable resin systems are suitable as thermosetting resins, in particular, for. B. phenolic resins, but also amine resins, epoxy resins, unsaturated Poryester resins, polyurethane resins and alkyd resins or combinations of these resins.
  • fiber-reinforced material whose fiber material consists of 100% polyacrylonitrile fibers.
  • the fiber material of the sheet-like textile materials can be in a smooth or crimped (textured) form and in the form of staple fibers, staple fiber yarns or multifilament yarns. If the sheet-like textile material contained in the material used according to the invention is a nonwoven material, the fiber material generally consists of crimped staple fibers.
  • the staple length of these fibers is usually between 20 and 200 mm. In view of special strength requirements, it is particularly advantageous to work with staple fibers of approximately 60 to 150 mm in length.
  • Non-woven materials made of staple fibers with an average staple length of 40 to 120 mm are particularly advantageous for the intended use according to the invention.
  • the nonwovens used in the materials used according to the invention can expediently still by heat treatment, for. B. by calendering, in particular with embossing calenders or by bonding strengthening, for example by a thermosetting binder or by binder filaments with a relatively high melting point or by mechanical means such as. B. pre-consolidated by needles.
  • Woven and knitted fabrics / knitted fabrics can consist of smooth or preferably of textured multifilament yarns or preferably of secondary spun staple fiber yarns.
  • Textured yarn should be understood to mean any yarn structured in a manner known per se, in particular also fancy yarns such.
  • the basis weights of the sheet-like textile materials contained in the material used according to the invention are expediently in the range from 100 to 280, preferably 120 to 250, in particular in the range from 120 to 150 g / m 2.
  • the staple fiber yarns in turn can be in the form of single yarns or twists and they can have other known spinning or twisting effects.
  • Fabrics with a plain weave are used in particular as textile fabrics for producing the materials used according to the invention.
  • these fabrics consist of staple fiber yarns, in particular staple fiber yarns based on high-strength polyacrylonitrile fibers.
  • the fiber material contained in the materials used according to the invention consists at least 30% of polyacrylonitrile fibers.
  • natural fibers which can be contained in the materials used according to the invention, come in particular cellulose fibers such. B. cotton or jute fibers into consideration.
  • Synthetic fibers that can be contained in the materials used according to the invention are, in principle, all known high-strength, high-modulus, sufficiently temperature-resistant synthetic fibers such as, for. B. partially or fully aromatic polyamide fibers or partially or fully aromatic polyester fibers into consideration.
  • the use of phenolic resins as a thermoset and the use of Textile fabrics made of polyacrylonitrile fibers are particularly advantageous.
  • the use of the high-strength types of polyacrylonitrile fibers in oxidized or non-oxidized form is particularly preferred.
  • the synthetic fibers can be in crimped or non-crimped form and as continuous or staple fiber, depending on the type of textile fabric.
  • the titer of the synthetic fibers is advantageously 0.7 to 9 dtex, in particular 1.0 to 6.7 dtex.
  • the strength of the high-strength fiber types expediently used is in the range from 65 to 75 cN / tex for polyethylene terephthalate and over 55 cN / tex for high-strength polyacrylonitrile types.
  • the maximum tensile strength elongation of the synthetic fibers which are expediently used is in the range from 14 to 17% for polyethylene terephthalate and in the range from 8 to 17% for the particularly preferred types of polyacrylonitrile fiber.
  • Particularly preferred materials used according to the invention contain sheet-like textile materials, in particular fabrics, scrims or nonwovens made of highly stretched, non-oxidized polyacrylonitrile fibers, which are commercially available, for example, under the designation R Dolanit in types 12 and 15. These are crimped long fiber types (cutting length approx. 30-100 mm), which are characterized by good adhesion within the yarn composite and can therefore be easily processed into yarns / fabrics and nonwovens. Such high-strength fibers are distinguished from textile polyacrylonitrile fibers by almost twice the fiber strength, as well as by their good chemical and temperature resistance.
  • a particularly preferred embodiment of the material used according to the invention contains, for example, a Knitted fabric / knitted fabric or in particular a fabric made from a crimped, twisted staple fiber yarn made from the high-strength polyacrylonitrile fiber type R Dolanit 15 or a fleece made from crimped staple fibers made from the high strength polyacrylonitrile fiber type ® Dolanit 12.
  • phenolic resins are preferably used as thermosetting resins.
  • Suitable condensation products of phenol and phenol derivatives with aldehydes, in particular with formaldehyde, are contained as phenolic resin in the fiber-reinforced materials used according to the invention.
  • Suitable phenol derivatives are in particular substituted phenols, in particular alkyl-substituted phenols such as. B. cresols, xylenols and other alkylphenols such as e.g. p-tert-butylphenol, octylphenol and nonylphenol but also arylphenols, e.g. Phenylphenol, naphthols, and dihydric phenols such as e.g. Resorcinol and bisphenol A.
  • phenolic resins are to be understood as meaning both the condensation products of the individual compounds mentioned and also condensation products of mixtures of the above-mentioned phenols and phenol derivatives with aldehydes, in particular with formaldehyde. If individual compounds are to be used for the production of the phenolic resins, it should be noted that these must have at least three times the functionality compared to the aldehyde.
  • the phenolic resins mentioned can also be used in a manner known per se to optimize special properties by adding unsaturated natural or synthetic compounds such as, for. B. be modified wood oil, rosin or styrene. Condensation products of formaldehyde with phenol itself and mixtures of phenol with lower proportions of the phenol derivatives mentioned, in particular the alkyl-substituted phenols mentioned, are particularly preferred.
  • the phenolic resins contained in the materials used according to the invention usually have a molar ratio of phenol to formaldehyde of 1: 1 to 1: 3, preferably of 1: 1.2 to 1: 2.2.
  • Suitable phenolic resins are commercially available, for example, under the type designation Phenodur VPR 45.
  • Phenolic resin preferably additionally contains one or more substances which serve as plasticizing components, ie which expand the elastic range of the resin.
  • plasticizing components ie which expand the elastic range of the resin.
  • Such agents are advantageously contained in the phenolic resin in an amount of 1 to 25% by weight, preferably 3 to 10% by weight, in particular 4 to 7% by weight.
  • Epoxy resins, alkyd resins and derivatives of polyvinyl alcohol, such as polyvinyl acetals, preferably polyvinyl butyral, have proven to be particularly suitable plasticizing components.
  • Preferred types of polyvinylbutyral are soluble in lower aliphatic alcohols, have a degree of acetalization of 60 to 75%, preferably 68 to 72% and a 6% methanolic solution of the preferred polyvinylbutyral has a viscosity of 20 to 20, preferably 4 to, 20 ° C. 6 mPa.s.
  • thermosetting resin contained in the materials used according to the invention can contain, in addition to the additives mentioned, other additives customary in phenolic resins such as, for example, defoamers, wetting agents, leveling agents, adhesion promoters or also other plasticizers and latent hardeners. If desired, these additives can be present in the thermosetting resin in a proportion of up to 2% by weight, preferably in the range from 0.1 to 1% by weight.
  • the material has a corresponding number of layers of the flat textile material.
  • the phenolic resin contained in the fiber-reinforced materials used according to the invention is practically in the cured, ie. H. networked state before.
  • Tapes are made in a manner known per se by impregnating a web of the sheet-like textile material described above in a suitable manner, for example by impregnation, slapping, brushing or knife coating, with a solution of a thermosetting resin described above, which optionally contains one or more of the additives specified above contains, so that the impregnated material contains a fiber fraction, calculated from solid to solid, of 30 to 70% by weight, preferably 40 to 60% by weight of fiber material.
  • the impregnate obtained in this way is, after a drying process until tack-free, in which the major part of the solvent and optionally water is removed and in which the resin is subjected to further condensation in order to adjust the flow and hardening behavior, stacked in several layers and through Application of pressure and heat brought into the desired sheet-like shape.
  • the dry prepreg is cut into suitable sections, which are stacked on top of one another and subjected to a heat treatment under pressure, the layers melting together as the resin flows.
  • the skis according to the invention can then be produced from the sheet-like plates or bands made of the fiber-reinforced material and thus produced using conventional manufacturing processes.
  • the fiber-reinforced sheet-like plates or tapes used according to the invention are distinguished by a particularly high flexibility and high resilience, by a low tendency to delaminate and by a high resistance to high temperatures and solvents and / or swelling liquids. Furthermore, these sheet-like plates or strips have a very high mechanical strength with very favorable wear behavior and high wear resistance, as well as a low water absorption.
  • the ski according to the invention will consist of layers of different materials. However, it is also possible to build a ski only or mainly from the flat plates or bands marked above.
  • the ski according to the invention is described by way of example using the cross sections shown in FIGS. 1 and 2.
  • a core (6) is shown schematically, which consists of several units, for example wooden blocks, which are glued together.
  • Sidewalls (7) are attached to the sides of the core and are preferably made of plastic.
  • a wide top flange (8) is attached to the top surface of the core (6) and a wide bottom flange (5) is attached to the bottom surface of the core (6).
  • both the upper flange (8) and the lower flange (5) are made of glass fiber reinforced plastic.
  • Two rubber strips (4) are attached below the wide lower flange (5).
  • a narrow lower flange (3) follows below the wide lower flange (5).
  • this consists of flat strips made of a fabric made of high-strength polyacrylonitrile fibers, which contains a hardened phenol-formaldehyde resin.
  • the ski is closed at the bottom by the tread (2), for example made of polyethylene, and from the edges (1), for example made of steel.
  • the wide top flange (8) is followed by several layers of different materials. In the present case, these are two prepregs (9), for example made of glass fiber reinforced plastic, an upper edge (10) made of metal, a narrow upper flange (11) made of glass fiber reinforced plastic, and further layers (20) and (12) prepregs.
  • FIG. 1 A further embodiment of the ski according to the invention is shown in FIG.
  • Wide top straps (8) and (9) and bottom straps (5) made of glass fiber reinforced plastic are attached around the core (6) and the side cheeks (7).
  • the construction is supported by rubber strips (4).
  • a narrow lower flange (3) is connected below the wide lower flange (5).
  • this consists of flat strips made of a fabric made of high-strength polyacrylonitrile fibers, which contains a hardened phenol-formaldehyde resin.
  • the ski is closed at the bottom by the tread (2), for example made of polyethylene, and from the edges (1), for example made of steel.
  • there is also a metal rail (17) between the narrow lower flange (3) and the running surface (2) e.g. made of aluminum.
  • the ski according to the invention corresponds to one of the embodiment shown in FIG. 1, in which the following modifications have been made: Instead of the prepregs (9), two metal rails, for example made of aluminum, are used; instead of the top edge made of metal (10) and the narrow top flange (11) one or two layers of glass fiber reinforced plastic are used; Instead of the further layers (20) and (12) of prepregs, one or two layers of flat strips made of a fabric made of high-strength polyacrylonitrile fibers, which contains a hardened phenol-formaldehyde resin, are used. In this particularly preferred embodiment, strips made of the highly flexible material are used both above and below the core (6).
  • the following example describes the production of a prepreg, which after curing can be used as a sheet or tape in the ski according to the invention.
  • the impregnation system is impregnated with a resin mixture of 100 kg phenolic resin, 65% in methanol ( ® Phenodur VPR 45 from Hoechst AG), 26 kg polyvinyl butyral, 25% in ethanol ( ® Mowital B 30 T from Hoechst AG), 0.2 kg of a defoamer and 7.9 kg of organic solvent based on a partially etherified low molecular weight alkanediol.
  • a fabric made of a twisted, high-strength polyacrylonitrile staple fiber yarn ( ® Dolanit 15 from Hoechst AG) with a basis weight of approx. 225 g / m2 was impregnated with this resin composition on an impregnation system at an impregnation speed of 5 m / min and then at a temperature between 130 and 150 ° C dried.
  • the prepreg obtained had the following properties: Resin content: approx. 46%, Harz river: 14-17%

Landscapes

  • Laminated Bodies (AREA)
  • Reinforced Plastic Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Panels For Use In Building Construction (AREA)
  • Golf Clubs (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Nonwoven Fabrics (AREA)
EP91121934A 1990-12-24 1991-12-20 Ski enthaltend flächenförmige Platten oder Bänder aus einem faserverstärkten Werkstoff Expired - Lifetime EP0492498B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041740 1990-12-24
DE4041740A DE4041740A1 (de) 1990-12-24 1990-12-24 Ski enthaltend flaechenfoermige platten oder baender aus einem faserverstaerkten werkstoff

Publications (2)

Publication Number Publication Date
EP0492498A1 EP0492498A1 (de) 1992-07-01
EP0492498B1 true EP0492498B1 (de) 1994-12-21

Family

ID=6421415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121934A Expired - Lifetime EP0492498B1 (de) 1990-12-24 1991-12-20 Ski enthaltend flächenförmige Platten oder Bänder aus einem faserverstärkten Werkstoff

Country Status (13)

Country Link
US (1) US5591509A (fi)
EP (1) EP0492498B1 (fi)
JP (1) JPH04314467A (fi)
AT (1) ATE115877T1 (fi)
CA (1) CA2058314A1 (fi)
CZ (1) CZ280868B6 (fi)
DE (2) DE4041740A1 (fi)
ES (1) ES2067841T3 (fi)
FI (1) FI94392C (fi)
HU (1) HUT61901A (fi)
NO (1) NO176084C (fi)
PL (1) PL169398B1 (fi)
YU (1) YU48151B (fi)

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US6837512B2 (en) 2001-10-24 2005-01-04 David M. Long Apparatus for improving human mobility on snow surfaces

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US5823545A (en) * 1995-10-04 1998-10-20 Goeckel; Gregory W. Roller skate chassis
AU9579398A (en) 1997-09-26 1999-04-23 Volant Sports L.L.C. Snowboard with selectively added structural components
FR2771939B1 (fr) * 1997-12-10 2000-01-14 Rossignol Sa Noyau pour surf de neige
FR2781165B1 (fr) * 1998-07-17 2000-08-25 Rossignol Sa Procede de realisation d'un ski ou autre planche de glisse sur neige
US6431604B1 (en) 1999-01-29 2002-08-13 Gregory W. Goeckel Inline roller skate with attached slider plate
FR2800100B1 (fr) * 1999-10-25 2001-11-16 Chomarat & Cie Materiau textile en nappe pour usages techniques
US6648363B2 (en) * 2001-12-05 2003-11-18 Shale Gordon Composite sports board such as a skateboard deck
DE10236959B4 (de) * 2002-08-13 2004-10-07 Leonhard Kurz Gmbh & Co. Kg Mehrschichtfolie für den Bau von Skiern
US6846161B2 (en) * 2002-10-24 2005-01-25 Baxter International Inc. Blood component processing systems and methods using fluid-actuated pumping elements that are integrity tested prior to use
US6764754B1 (en) * 2003-07-15 2004-07-20 The Boeing Company Composite material with improved damping characteristics and method of making same
US7347431B2 (en) * 2004-09-09 2008-03-25 Chomp, Inc. Skateboard deck construction
TWI300802B (en) * 2005-12-23 2008-09-11 Foxconn Tech Co Ltd Thermal interface material and semiconductor device
US20070252362A1 (en) * 2006-04-28 2007-11-01 Scott Burwell Hybrid skateboard deck
CN200963503Y (zh) * 2006-08-04 2007-10-24 荣和丽科技(深圳)有限公司 具有头尾保护装置的滑雪板
US20080054578A1 (en) * 2006-08-30 2008-03-06 Sbf Systems Inc. Ski having front and rear protective mechanism
US7810824B2 (en) 2007-01-10 2010-10-12 Chomp, Inc. Skateboard deck
FR2916983B1 (fr) * 2007-06-06 2010-08-13 Salomon Sa Planche de glisse ou de roulage
FR2942413A1 (fr) 2009-02-20 2010-08-27 Sinaxis Planche pour la pratique du saut acrobatique sur trampoline
DE102011010371A1 (de) * 2011-02-04 2012-08-09 Ecco Gleittechnik Gmbh Verbundwerkstoff auf Basis eines naturfaserverstärkten Kunststoffes
EP2679619B1 (en) * 2011-02-23 2021-02-24 Toray Industries, Inc. Fiber reinforced composite material
FR3007413B1 (fr) * 2013-06-20 2020-11-27 Les Stratifies Procede de bordurage de panneaux composites, ruban pour la mise en oeuvre du procede, panneau obtenu par le procede et machine de mise en oeuvre du procede.

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Also Published As

Publication number Publication date
ATE115877T1 (de) 1995-01-15
HUT61901A (en) 1993-03-29
FI916075L (fi) 1992-06-25
HU914098D0 (en) 1992-04-28
DE4041740A1 (de) 1992-06-25
NO176084C (no) 1995-02-01
NO915091L (no) 1992-06-25
DE59103988D1 (de) 1995-02-02
CZ280868B6 (cs) 1996-04-17
YU48151B (sh) 1997-05-28
PL292941A1 (en) 1992-07-13
CA2058314A1 (en) 1992-06-25
CS404791A3 (en) 1992-07-15
ES2067841T3 (es) 1995-04-01
EP0492498A1 (de) 1992-07-01
JPH04314467A (ja) 1992-11-05
FI916075A0 (fi) 1991-12-20
US5591509A (en) 1997-01-07
FI94392B (fi) 1995-05-31
YU194291A (sh) 1994-12-28
NO915091D0 (no) 1991-12-23
PL169398B1 (pl) 1996-07-31
NO176084B (no) 1994-10-24
FI94392C (fi) 1995-09-11

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