EP2527014B1 - Semelle de ski - Google Patents

Semelle de ski Download PDF

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Publication number
EP2527014B1
EP2527014B1 EP20110180996 EP11180996A EP2527014B1 EP 2527014 B1 EP2527014 B1 EP 2527014B1 EP 20110180996 EP20110180996 EP 20110180996 EP 11180996 A EP11180996 A EP 11180996A EP 2527014 B1 EP2527014 B1 EP 2527014B1
Authority
EP
European Patent Office
Prior art keywords
graphene
plastic
friction
ski sole
ski
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.)
Active
Application number
EP20110180996
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German (de)
English (en)
Other versions
EP2527014A1 (fr
Inventor
Nikolaus Hotter
Herfried Lammer
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.)
Head Technology GmbH
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Head Technology GmbH
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Publication date
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Priority to EP20110180996 priority Critical patent/EP2527014B1/fr
Publication of EP2527014A1 publication Critical patent/EP2527014A1/fr
Application granted granted Critical
Publication of EP2527014B1 publication Critical patent/EP2527014B1/fr
Active 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
    • A63C5/04—Structure of the surface thereof
    • A63C5/056—Materials for the running sole

Definitions

  • the invention relates to a plastic ski coating with a filler mixture for improving the sliding properties.
  • hydrophobic character in particular polyethylene
  • EP-A-0821 030 describes low friction polyethylene materials with admixtures of fluoro graphite of the formula CF n where n can vary from 0.5 to 1.3. Measurements on press sintered polyethylene samples with 10 to 30% CF n against steel gave kinetic coefficients of friction of 0.27 to 0.13 according to ASTM 03702, compared to 0.35 for polyethylene versus steel. In EP-A-0821 030 It also proposes the use of such materials for skis. However, since hydrodynamic lubrication is present when gliding skis on snow, as explained above, it can not be readily assumed that skis made of such materials will slip when gliding on snow would have reduced friction.
  • EP-A-821,030 polyethylene fluoride graphite polyethylene skim materials have shown that fluoro graphite, as an additive in polyethylene, does not significantly reduce friction or increase slip rate.
  • EP-0 960 905 shows that blends of fluorite graphite with carbon black as an additive to polyethylene significantly reduce the friction of skis on snow in some cases or increase the sliding speed.
  • Soot consists of the smallest, mostly spherical particles, which are also called primary particles. These usually have a size of 10-300 nm, therefore one speaks of so-called nanoparticles. They are thus more than a thousand times smaller than the diameter of a hair. These primary particles have grown together into chain-like, partially lumpy aggregates. Many of these aggregates pool together to form the agglomerates. By varying the production conditions, both the size of the primary particles and their aggregation can be adjusted specifically.
  • the ski coating preferably a plastic ski coating, contains a filler compound for improving the sliding properties, the filler mixture containing graphene and carbon black.
  • Graphene (Graphene, sometimes also written in German graphs to distinguish it from mathematical graphs) is the term for a modification of carbon with a two-dimensional structure in which each carbon atom is surrounded by three others, forming a honeycomb-shaped pattern formed.
  • the outline sketch in FIG. 1 shows how now the two-dimensional crystal form of the graphene can wrap around the PE grains, while the carbon black primary particles fill the space between the PE particles.
  • the polyethylene (PE) find another suitable plastic use.
  • FIGS. 2A to 2D show microscope images in 50-fold magnification of thin sections of different Skibeläge:
  • the FIGS. 2A and 2B show a conventional coating with standard black, the Figure 2C a ski coating according to the invention with graphene and carbon black and the FIG. 2D a conventional coating without soot.
  • the plastic may preferably be pressed-sintered plastic powder or plastic granules, preferably of polyethylene, in particular low-pressure polyethylene having a molecular weight of 4 to 12 ⁇ 10 6 g / mol. It may preferably contain 5 to 30, more preferably 10 to 20 parts by weight of carbon black and 0.1 to 10 parts by weight of graphene per 100 parts by weight of plastic.
  • the thickness of the plastic ski coating according to the invention is preferably less than 1 mm, preferably 0.7 to 0.9 mm.
  • the surface of the graphene is silanized. Functionalized graphenes, especially those modified with silane, showed better properties in terms of wear and friction.
  • An inventive ski coating can be produced, for example, by the following process steps: In a first phase, an intimate mixture of 100 parts by weight of an ultrahigh molecular weight low density polyethylene (UHMWPE) and 5 parts by weight of graphene is prepared. In a second phase, the thus prepared mixture of UHMWPE and graphene is intimately mixed with 15 parts by weight of carbon black in a mixer for 15 minutes and then in a cylindrical die under known heat and steam Pressure ratios (as given in the booklet of Hoechst to their low-density polyethylene "Hostalen GUR" [Brochure HKR112-7089C12299 / 14] given) to a homogeneous cylindrical sintered compacted.
  • UHMWPE ultrahigh molecular weight low density polyethylene
  • graphene graphene
  • the cylindrical sintered body After cooling, of the cylindrical sintered body is an endless belt in the desired thickness of the ski coating of e.g. 1.4 mm peeled off.
  • the ski base is then roughened in a known manner on one side with a sanding belt and pretreated by an oxidizing flame for bonding to the ski body.
  • the ski coating can be produced not only in the press sintering process with subsequent peeling, but also, for example, in the extrusion process, as long as there is an admixture of an additive consisting of a mixture of carbon black and graphene.
  • the graphene in the ski coating can be replaced either completely or partially by graphene oxide.
  • a test track was traversed with structurally identical skis, which differed by the covering used, with a mean speed of 100 km / h and recorded the time required for this by means of electronic time measurement.
  • Composition tread Measured time in s Measured time in% 85% PE, 15% soot 22.84 100 85% PE, 14% carbon black, 1% graphene 22,03 96.45 85% PE, 13% carbon black, 2% graphene 21.79 95.4 85% PE, 13% carbon black, 2% graphene oxide 22,01 96.41

Landscapes

  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (5)

  1. Semelle en matière plastique pour un ski, comprenant un mélange de matières de charge pour améliorer les caractéristiques de glissement, le mélange de matières de charge comportant du graphène ou de l'oxyde de graphène ainsi que de la suie, la teneur en graphène ou oxyde de graphène étant entre 0,1 et 10 pourcents en poids.
  2. Semelle selon la revendication 1, la matière plastique étant de la poudre de matière plastique ou du granulat de matière plastique, fritté par pression.
  3. Semelle selon une des revendications précédentes ayant une épaisseur inférieure à 1 mm.
  4. Semelle selon une des revendications précédentes, où la surface du graphène ou de l'oxyde de graphène est silanisée.
  5. Semelle selon une des revendications précédentes, où le mélange de matières de charge contient du graphène ou de l'oxyde de graphène.
EP20110180996 2011-05-26 2011-09-13 Semelle de ski Active EP2527014B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110180996 EP2527014B1 (fr) 2011-05-26 2011-09-13 Semelle de ski

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11167686 2011-05-26
EP20110180996 EP2527014B1 (fr) 2011-05-26 2011-09-13 Semelle de ski

Publications (2)

Publication Number Publication Date
EP2527014A1 EP2527014A1 (fr) 2012-11-28
EP2527014B1 true EP2527014B1 (fr) 2014-08-20

Family

ID=44582664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110180996 Active EP2527014B1 (fr) 2011-05-26 2011-09-13 Semelle de ski

Country Status (1)

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EP (1) EP2527014B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112480684A (zh) * 2020-12-01 2021-03-12 中国科学技术大学 硅烷化石墨烯/硅橡胶复合材料及其制备方法和应用

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109702206B (zh) * 2018-11-23 2020-12-08 北京石墨烯技术研究院有限公司 冰刀的制备方法
CN109701251B (zh) * 2018-11-23 2020-06-12 北京石墨烯技术研究院有限公司 冰刀及冰刀鞋

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH657993A5 (en) 1983-01-14 1986-10-15 Ims Kunststoff Ag Covering for the running surface of a ski
CH660018A5 (en) 1984-03-08 1987-03-13 Ims Kunststoff Ag Ski wax
AT398169B (de) * 1989-08-18 1994-10-25 Fischer Gmbh Laufflächenbelag für skier
CH690721A5 (it) 1996-07-24 2000-12-29 Ct Io Trading Lda Materiale a basso coefficiente d'attrito ed utilizzazione del materiale per la fabbricazione di sci e simili nonché un procedimento fabbricazione del materiale a basso coefficiente d'attrito
ATE374224T1 (de) 1998-05-18 2007-10-15 Ims Kunststoff Ag Kunststoff-skibelag
US7226071B2 (en) * 2004-11-09 2007-06-05 Ims Kunststoff Ag Running surface for a winter sports apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112480684A (zh) * 2020-12-01 2021-03-12 中国科学技术大学 硅烷化石墨烯/硅橡胶复合材料及其制备方法和应用
CN112480684B (zh) * 2020-12-01 2022-01-11 中国科学技术大学 硅烷化石墨烯/硅橡胶复合材料及其制备方法和应用

Also Published As

Publication number Publication date
EP2527014A1 (fr) 2012-11-28

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