EP0341236B1 - Process for manufacturing a sole member for a ski, and ski with a sole member manufactured by this process - Google Patents

Process for manufacturing a sole member for a ski, and ski with a sole member manufactured by this process Download PDF

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Publication number
EP0341236B1
EP0341236B1 EP89890135A EP89890135A EP0341236B1 EP 0341236 B1 EP0341236 B1 EP 0341236B1 EP 89890135 A EP89890135 A EP 89890135A EP 89890135 A EP89890135 A EP 89890135A EP 0341236 B1 EP0341236 B1 EP 0341236B1
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EP
European Patent Office
Prior art keywords
polyethylene
sole
laminated
ski
process according
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
EP89890135A
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German (de)
French (fr)
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EP0341236A1 (en
Inventor
Robert Schamesberger
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.)
Isosport Verbundbauteile GmbH
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Isosport Verbundbauteile GmbH
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Publication of EP0341236A1 publication Critical patent/EP0341236A1/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/044—Structure of the surface thereof of the running sole
    • 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
    • A63C5/04—Structure of the surface thereof
    • A63C5/056—Materials for the running sole

Definitions

  • the invention relates to a method for producing a tread component for skis, which has a tread covering, which is produced by extrusion of a strip or plate-shaped material which consists at least predominantly of polyethylene. It also relates to a ski which contains a tread component produced by the method according to the invention.
  • the invention as characterized in claims 1 to 6 is, the object is first to provide a continuous process for producing a tread component with a tread covering made of high molecular weight polyethylene, in which - while maintaining the good properties of the tread covering - the aforementioned disadvantages of the known methods are avoided.
  • the invention finally relates to a ski which has a tread component produced by the method according to the invention.
  • a tread covering based on a high molecular weight polyethylene with an average molecular weight (weight average) of 5. 106 is first produced.
  • a so-called ram extrusion process is preferably used to process polyethylenes of such a high molecular weight.
  • this process has been developed for processing ultra-high molecular thermoplastics, which due to their high molar masses can no longer be plasticized and can therefore no longer be processed by conventional melt extrusion.
  • the strand to be extruded is sintered almost continuously.
  • FIG. 1 now shows a schematic representation of a device for producing a tread component material as an endless strand. It essentially comprises a ram extruder, of which only the nozzle 1 is indicated in the figure, a three-roll calender with the calender rolls 2, 3 and 4 and a supply roll 5 for the material to be laminated.
  • the tape 6 extruded from the polyethylene-lubricant mixture is pulled off the nozzle 1 while still warm and then passes through the gap between the calender rolls 2 and 3, which are kept at temperatures of 80 and 110 ° C. .
  • the tapes thus combined which run over approximately half the circumference of the calender roll 3 and continue to heat up in the process, are now brought to a temperature via the calender roll 4 is held at 100 ° C, on which the polyester fleece 7 is further heated and pressed into the surface of the extruded tape 6 even further.
  • the composite thus formed is pulled off in the direction of arrow 9 from the calender roll and, after cooling, is rolled up as a finished endless tread component material.
  • Fig. 2 shows this tread component material in section.
  • the thickness of the band 6 is denoted by a.
  • the tread component described above has a number of advantages.
  • the hydrophobizing lubricant contained in the tread material of the band 6 reduces the solid friction of ski and snow. Because of the addition of lubricant, it would be difficult to directly glue the tread material of the band 6 to the other ski components during ski manufacture;
  • a decoratively printed film made of thermoplastic material can also be used as the material to be laminated in accordance with another process variant.
  • a film is e.g. B. a film made by a conventional melt extrusion made of polyethylene, which has an average molecular weight (weight average) less than 5. 105. After lamination, the bondability of the free film surface is preferably further improved by flame treatment.

Abstract

To manufacture a sole member for skis, a strip-shaped material is extruded from polyethylene powder with a mean molar mass (mean weight) in the region between 5.10<5> and 8.10<6>, which is mixed, if appropriate with low-molecular additives, such as oils, paraffins, lubricants, waterproofing agents and the like, using a special extrusion method, e.g. a so-called ram extrusion method. Even before the strip-shaped material is cooled, a flat material, consisting at least mainly of plastic, is laminated onto one of its surface sides, said material being provided on that side, on which it is to be connected to the polyethylene sole material, with a decorative layer, preferably a print which can then be recognised on the sole member through the transparent sole material. This composite material is then cut to the lengths of sole members. The material to be laminated on, which can consist of a nonwoven, e.g. a polyester nonwoven or of a thermoplastic film, such as a melt-extruded polyethylene film, additionally serves as a bonding aid for the sole material. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Laufflächenbauteils für Skier, welcher einen Laufflächenbelag aufweist, der durch Extrusion eines band- oder plattenförmigen Materials, das zumindest überwiegend aus Polyäthylen besteht, erzeugt wird. Sie betrifft ferner einen Ski, der einen nach dem erfindungsgemäßen Verfahren hergestellten Laufflächenbauteil enthält.The invention relates to a method for producing a tread component for skis, which has a tread covering, which is produced by extrusion of a strip or plate-shaped material which consists at least predominantly of polyethylene. It also relates to a ski which contains a tread component produced by the method according to the invention.

Im Skibau wird seit einigen Jahren als Material für Laufflächenbeläge fast ausschließlich Polyäthylen verwendet. Der Grund hierfür liegt in dem apolaren Charakter des Polyäthylens und den damit verbundenen sehr guten Gleiteigenschaften am Schnee, seiner Wachsaufnahmefähigkeit sowie in seiner hohen Verschleißfestigkeit. Am besten haben sich dabei Laufflächenbeläge aus einem hochmolekularen Polyäthylen bewährt, wobei man zu ihrer Herstellung das Polyäthylenpulver zu dichten Blöcken heiß sintert, aus denen dann die Laufflächenbeläge durch einen Schälvorgang gewonnen werden. Diese Art der Herstellung hat nun aber als semikontinuierliches Verfahren einige Nachteile, insbesondere den einer beträchtlichen Abfallmenge an gesintertem Material, das nur schwer wiederverwertet werden kann. Die Herstellung von Laufflächenbauteilen, welche die so hergestellten Laufflächenbeläge enthalten, erfolgt auf konventionelle Weise durch miteinander Verkleben der einzelnen Bauteilkomponenten.In ski construction, polyethylene has been used almost exclusively as a material for tread coverings for some years. The reason for this lies in the apolar character of the polyethylene and the associated very good sliding properties on the snow, its wax absorption and its high wear resistance. Tread coverings made from a high molecular weight polyethylene have proven to be best, the polyethylene powder being sintered hot to form dense blocks, from which the tread coverings are then obtained by a peeling process. However, this type of production has some disadvantages as a semi-continuous process, in particular that of a considerable amount of waste of sintered material that is difficult to recycle. The production of tread components, which contain the tread coverings produced in this way, is carried out in a conventional manner by gluing the individual component components together.

Der Erfindung, wie sie in den Ansprüchen 1 bis 6 gekennzeichnet ist, liegt nun zunächst die Aufgabe zugrunde, ein kontinuierliches Verfahren zum Herstellen eines Laufflächenbauteils mit einem Laufflächenbelag aus hochmolekularen Polyäthylen anzugeben, bei dem - unter Beibehaltung der guten Eigenschaften des Laufflächenbelages - die vorstehend genannten Nachteile der bekannten Verfahren vermieden werden.The invention as characterized in claims 1 to 6 is, the object is first to provide a continuous process for producing a tread component with a tread covering made of high molecular weight polyethylene, in which - while maintaining the good properties of the tread covering - the aforementioned disadvantages of the known methods are avoided.

Gegenstand der Erfindung ist schließlich ein Ski, der einen durch das erfindungsgemäße Verfahren hergestellten Laufflächenbauteil aufweist.The invention finally relates to a ski which has a tread component produced by the method according to the invention.

Die Erfindung wird nachstehend anhand der Figuren und Beispielen näher erläutert.The invention is explained below with reference to the figures and examples.

Zur Herstellung eines Laufflächenbauteils wird zunächst ein Laufflächenbelag auf Basis eines hochmolekularen Polyäthylens mit einer mittleren Molmasse (Gewichtsmittel) von 5. 10⁶ erzeugt. Für die Verarbeitung von Polyäthylenen einer so hohen Molmasse bedient man sich vorzugsweise eines sogenannten Ram-Extrusionsverfahrens. Dieses Verfahren wurde in den letzten Jahren zur Verarbeitung von ultrahochmolekularen Thermoplasten entwickelt, die wegen ihrer hohen Molmassen nicht mehr plastifizierbar sind und sich daher durch eine übliche Schmelzextrusion nicht mehr verarbeiten lassen. Bei diesem Ram-Extrusionsverfahren wird der zu extrudierende Strang quasi kontinuierlich gesintert.To produce a tread component, a tread covering based on a high molecular weight polyethylene with an average molecular weight (weight average) of 5. 10⁶ is first produced. A so-called ram extrusion process is preferably used to process polyethylenes of such a high molecular weight. In recent years, this process has been developed for processing ultra-high molecular thermoplastics, which due to their high molar masses can no longer be plasticized and can therefore no longer be processed by conventional melt extrusion. In this ram extrusion process, the strand to be extruded is sintered almost continuously.

Zur Vorbereitung der zu extrudierenden Masse werden 95 Gew. % Polyäthylenpulver mit 5 Gew. % eines Gleitmittels auf Basis von Fettsäureamid, wie es z. B. von der Firma Hoechst unter der Bezeichnung Hostalob FA3 zu beziehen ist, in einem Schnellmischer gemischt, wobei sich das Gleitmittel an den Polyäthylen-Pulverpartikeln anlagert und dadurch in der Polyäthylenmasse gleichmäßig verteilt ist. Aus diesem Gemisch wird nun mit dem genannten Ram-Extrusionsverfahren ein bandförmiges Material einer Dicke von 1 ,4 mm extrudiert. Innerhalb der Ram-Extrusionsvorrichtung durchläuft das zu extrudierende Material eine Zone hohen Druckes, was bewirkt, daß das in der zu extrudierenden Masse enthaltene Gleitmittel weiterhin gleichmäßig verteilt bleibt.To prepare the mass to be extruded, 95% by weight of polyethylene powder with 5% by weight of a lubricant based on fatty acid amide, such as. B. from the company Hoechst under the name Hostalob FA3, mixed in a high-speed mixer, the lubricant accumulating on the polyethylene powder particles and thereby in the Polyethylene mass is evenly distributed. A band-shaped material with a thickness of 1.4 mm is now extruded from this mixture using the ram extrusion process mentioned. Within the ram extrusion device, the material to be extruded passes through a zone of high pressure, which causes the lubricant contained in the mass to be extruded to remain evenly distributed.

Fig. 1 zeigt nun in einer schematischen Darstellung eine Vorrichtung zur Herstellung eines Laufflächenbauteil-Materials als Endlosstrang. Sie umfaßt im wesentlichen einen Ram-Extruder, von welchem in der Figur nur die Düse 1 angedeutet ist, einen Dreiwalzenkalander mit den Kalanderwalzen 2, 3 und 4 sowie eine Vorratsrolle 5 für das anzulaminierende Material.1 now shows a schematic representation of a device for producing a tread component material as an endless strand. It essentially comprises a ram extruder, of which only the nozzle 1 is indicated in the figure, a three-roll calender with the calender rolls 2, 3 and 4 and a supply roll 5 for the material to be laminated.

Bei der Herstellung des Laufflächenbauteil-Materials wird das aus dem Polyäthylen-Gleitmittelgemisch extrudierte Band 6 noch im warmen Zustand von der Düse 1 abgezogen und durchläuft anschließend den Spalt zwischen den Kalanderwalzen 2 und 3, die auf Temperaturen von 80 bzw. 110°C gehalten werden. Ein bandförmiges Polyestervlies 7 mit einem Flächengewicht von 40 g/m², z. B. einer Art, wie es von der Firma Firet unter der Bezeichnung Type 3699 LL geliefert wird, und das an einer (in der Figur mit 8 bezeichneten) Seite mit einem dekorativen Aufdruck versehen ist, wird von der Vorratsrolle 5 abgezogen und - an der unteren Kalanderwalze 2 anliegend - in dem Spalt zwischen den Kalanderwalzen 2 und 3 mit dem extrudierten Band 6 vereinigt und dabei in seine Oberfläche etwas hineingedrückt.In the production of the tread component material, the tape 6 extruded from the polyethylene-lubricant mixture is pulled off the nozzle 1 while still warm and then passes through the gap between the calender rolls 2 and 3, which are kept at temperatures of 80 and 110 ° C. . A ribbon-shaped polyester fleece 7 with a basis weight of 40 g / m², for. B. a kind, as it is supplied by the company Firet under the designation Type 3699 LL, and which is provided on one (in the figure with 8 in the figure) with a decorative imprint, is withdrawn from the supply roll 5 and - at the lower calender roll 2 adjacent - combined in the gap between the calender rolls 2 and 3 with the extruded tape 6 and pressed something into its surface.

Die so vereinigten Bänder, die über etwa dem halben Umfang der Kalanderwalze 3 ablaufen und sich dabei weiter erwärmen, werden nun über die Kalanderwalze 4, die auf einer Temperatur von 100° C gehalten wird, geführt, an der das Polyestervlies 7 weiter erwärmt und in die Oberfläche des extrudierten Bandes 6 noch weiter hineingedrückt wird. Von der Kalanderwalze wird der so gebildete Verbund in Richtung des Pfeiles 9 abgezogen und wird nach Abkühlung als fertiges Endlos-Laufflächenbauteilmaterial aufgerollt.The tapes thus combined, which run over approximately half the circumference of the calender roll 3 and continue to heat up in the process, are now brought to a temperature via the calender roll 4 is held at 100 ° C, on which the polyester fleece 7 is further heated and pressed into the surface of the extruded tape 6 even further. The composite thus formed is pulled off in the direction of arrow 9 from the calender roll and, after cooling, is rolled up as a finished endless tread component material.

Fig. 2 zeigt dieses Laufflächenbauteilmaterial im Schnitt. Die Dicke des Bandes 6 ist mit a bezeichnet. Man erkennt das Polyestervlies 7, das in die Oberfläche des Bandes 6 etwas hineingedrückt ist.Fig. 2 shows this tread component material in section. The thickness of the band 6 is denoted by a. One can see the polyester fleece 7, which is pressed somewhat into the surface of the band 6.

Der vorstehend beschriebene Laufflächenbauteil, dessen Herstellung besonders einfach ist, hat eine Reihe von Vorteilen. Zunächst ist er bei 8 mit einem Dekor versehen, das durch das durchscheinende Laufflächenbelagmaterial des Bandes 6 zu erkennen ist. Das im Laufflächenbelagmaterial des Bandes 6 enthaltene hydrophobierende Gleitmittel vermindert die Festkörperreibung Ski - Schnee. Wegen des Gleitmittelzusatzes wäre eine direkte Verklebung des Laufflächenbelagmaterials des Bandes 6 mit den anderen Skibauteilen bei der Skiherstellung nur schwer zu realisieren; das anlaminierte an seiner freien Oberflächenseite gut zu verklebende Polyestervlies 7 schafft hier Abhilfe.The tread component described above, the manufacture of which is particularly simple, has a number of advantages. First of all, at 8 it is provided with a decoration which can be recognized by the translucent tread material of the band 6. The hydrophobizing lubricant contained in the tread material of the band 6 reduces the solid friction of ski and snow. Because of the addition of lubricant, it would be difficult to directly glue the tread material of the band 6 to the other ski components during ski manufacture; The laminated polyester fleece 7, which is easy to glue on its free surface side, helps here.

Anstatt eines Polyestervlieses kann gemäß einer anderen Verfahrensvariante als anzulaminierendes Material auch eine dekorativ bedruckte Folie aus thermoplastischem Material eingesetzt werden. Eine solche Folie ist z. B. eine durch eine übliche Schmelzextrusion hergestellte Folie aus Polyäthylen, das eine mittlere Molmasse (Gewichtsmittel) kleiner als 5. 10⁵ aufweist. Nach dem Anlaminieren wird die Verklebbarkeit der freien Folien-Oberfläche vorzugsweise noch durch eine Beflammung verbessert.Instead of a polyester nonwoven, a decoratively printed film made of thermoplastic material can also be used as the material to be laminated in accordance with another process variant. Such a film is e.g. B. a film made by a conventional melt extrusion made of polyethylene, which has an average molecular weight (weight average) less than 5. 10⁵. After lamination, the bondability of the free film surface is preferably further improved by flame treatment.

Claims (7)

1. Process for manufacturing a running surface construction part for skis showing a running surface coating, which is produced by extrusion of a material in the form of a band or plate, consisting substantially of polyethylene, characterized in that the used polyethylene has a medium molecular mass (medium weight) in the range between 5.10⁵ and 8.10⁶ and that on the one surface side of the band or plate shaped material - before the cooling of said material - during or after effected extrusion a mainly of plastic consisting flat material is laminated.
2. Process according to claim 1, characterized in that for the extrusion the mass to be extruded and consisting at least substantially of polyethylene is mixed with low molecular addititives such as oils, paraffins, lubricants, hydrophobic means and the like.
3. Process according to one of claims 1 and 2, characterized in that the plane material to be laminated is provided with a decorative layer, preferably a print, on that side which should be connected with the polyethylene running surface material.
4. Process according to one of claims 1 to 3, characterized in that the flat material to be laminated consists of a thermoplastic synthetic material.
5. Process according to claim 4, characterized in that as flat material a foil is used consisting at least substantially of polyethylene with a low molecular mass (medium weight) smaller than 5.10⁵.
6. Process according to one of claims 1 to 4, characterized in that the flat material to be laminated consists of non-woven fibres, preferably non-woven polyester fibres.
7. Ski, characterized in that it contains a running surface construction part manufactured according to one of claims 1 to 6.
EP89890135A 1988-05-05 1989-05-05 Process for manufacturing a sole member for a ski, and ski with a sole member manufactured by this process Expired - Lifetime EP0341236B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0118488A AT394810B (en) 1988-05-05 1988-05-05 METHOD FOR PRODUCING A RUNNING COMPONENT FOR SKIS AND SKI WITH A RUNNING COMPONENT PRODUCED BY THIS PROCESS
AT1184/88 1988-05-05

Publications (2)

Publication Number Publication Date
EP0341236A1 EP0341236A1 (en) 1989-11-08
EP0341236B1 true EP0341236B1 (en) 1992-06-24

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EP89890135A Expired - Lifetime EP0341236B1 (en) 1988-05-05 1989-05-05 Process for manufacturing a sole member for a ski, and ski with a sole member manufactured by this process

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EP (1) EP0341236B1 (en)
AT (2) AT394810B (en)
DE (1) DE58901732D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873769A4 (en) * 1996-09-17 1999-01-20 Asics Corp Ski and snowboard of excellent sliding characteristics and method of manufacturing the same
EP1611928B1 (en) * 2004-07-02 2006-10-11 Ims Kunststoff Ag Running sole for wintersport apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1205327A (en) * 1967-01-31 1970-09-16 Mitsubishi Petrochemical Co Process for the production of laminates
AT273750B (en) * 1967-09-15 1969-08-25 Albert Bader Sliding coating for skis
DE2210986A1 (en) * 1972-03-07 1973-09-13 Wacker Chemie Gmbh SKI WITH ABRASION-RESISTANT PRINTED POLYAETHYLENE OUTSOLE

Also Published As

Publication number Publication date
ATE77567T1 (en) 1992-07-15
EP0341236A1 (en) 1989-11-08
AT394810B (en) 1992-06-25
DE58901732D1 (en) 1992-07-30
ATA118488A (en) 1991-12-15

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