US3698731A - Multilayer ski and method for the fabrication thereof - Google Patents

Multilayer ski and method for the fabrication thereof Download PDF

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Publication number
US3698731A
US3698731A US883519A US3698731DA US3698731A US 3698731 A US3698731 A US 3698731A US 883519 A US883519 A US 883519A US 3698731D A US3698731D A US 3698731DA US 3698731 A US3698731 A US 3698731A
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United States
Prior art keywords
ski
multilayered
dampening
percent
possesses
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
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US883519A
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English (en)
Inventor
Wolf-Dieter Jost
Karl-Gunter Moritz
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Semperit AG Holding
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Semperit AG Holding
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Filing date
Publication date
Priority claimed from AT12049/68A external-priority patent/AT296833B/de
Priority claimed from AT351969A external-priority patent/AT305099B/de
Application filed by Semperit AG Holding filed Critical Semperit AG Holding
Application granted granted Critical
Publication of US3698731A publication Critical patent/US3698731A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A63C5/12—Making thereof; Selection of particular materials
    • A63C5/122—Selection of particular materials for damping purposes, e.g. rubber or the like
    • 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
    • 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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/07—Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness
    • 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

Definitions

  • the invention also relates to the method of fabri- 3,432,451 3/1969 Kales ..260/859 cation of su3h Ski or the like 2,581,532 1/1952 Hem ..280/1Ll3LM 2,992,939 7/1961 Larson et a1 ..117/75 26 Claims, 1 Drawing Figure MULTILAYER SKI AND METHOD FOR THE FABRICATION THEREOF BACKGROUND OF THE INVENTION
  • the present invention broadly relates to the field of skiing and, more specifically, relates to an improved multi-layered ski construction as well as to an improved method for the fabrication thereof.
  • ski manufacturers and designers of skis tended to concentrate essentially upon improvements in the rupture strength, bending strength, bending stiffness and longevity of the elastic properties. Yet, even a change of the bending stiffness in different zones over a length of the ski does not provide any solution of the dampening problem.
  • Another more specific object of the present invention relates to improved multi-layer ski construction and method for the fabrication thereof, which overcomes the prior art disadvantages herein discussed.
  • the invention proposes a multi-layer ski which is generally manifested by the features that it contains at least one strip-, bandor similar shaped insertand/or support member formed of a preferably crosslinked, elastomeric plastic material possessing a relative dampening of at least 8 percent, preferably at least 10 percent (measured in accordance with the flexural or bending wave technique at Hz).
  • the elastic material layers such as for instance wood, glass fiber reinforced plastic, aluminum or the like, which are known in ski construction, together with materials of high dampening values, it is possible to maintain the desired strengthand flexural or bending stiffness characteristics with high remaining elasticity.
  • the ski nonetheless possesses an optimum dampening behavior during the start of fluttering or vibration of the ski tips or rear ends. These vibrations die out very quickly by virtue of the inventive insertor support members.
  • dampening effect is that much better, that is to say, that the vibrations will tend to die out much more quickly, the more dampening material can be accommodated or housed in the ski and the less bridge formations occur between the non-dampening materials. Therefore, in accordance with the particularly advantageous embodiment of the invention layers of known material possessing an elastic pre-loading or pre-stress, such as for instance formed of glass fiber reinforced plastic, aluminum or the like, are completely encased by the dampening material.
  • the components which come into consideration for the inventive insertor support members of a multilayered ski are particularly the runner coating, the top coating, the side surfaces and the wedge insert.
  • the side surfaces of the skis which previously for instance, were formed of melamine resin or urea resin, are fabricated from a dampening material with the above described properties, in order to prevent the previously mentioned damaging bridge formation between the layers possessing strong elastic pre-loading and which generally guide above and below the core insert.
  • This coreor wedge insert previously was constructed of glued block wood, PVC, web constructions or the like. However, all of these inserts provided a relatively hardconnection, do not provide for any great dampening effect, and, for instance as is the case especially with PVC, are too stiff at low temperatures.
  • the inventive ski with a coreor wedge insert formed of dampening material distinguishes itself particularly well and advantageously from the previously known constructions.
  • the inserts are preferably constructed in profiled fashion, whereby it is particularly advantageous, to provide the recesses at the underside in order to afford sufficient support for the anchoring of screws which are necessary for the attachment of the binding from above.
  • a multi-layer ski in which especially the dampening materials which are used at the runner surfaces and the side edges contain additives which improve their sliding or gliding characteristics, such as for instance, silicone, powdered graphite, molybdenum sulfide or the like. Certain rubber types can have their sliding properties improved with the aid of known surface acting fluorination techniques.
  • Such type runner coating can be manufactured, for instance, according to the following formulation:
  • linear saturated polyester with an average molecular weight 2000 460 pure diphenylmethane 4,4'-diisocyanate 225 powdered graphite-batch 40 monostyrene l S 0 polyethylene AC 75 silicone oil 7 1,4-butanediol Total: 1,022
  • a good dampening for use in the construction of an inventive multi-layered ski in particular possess materials with high internal friction, for instance, heterogeneous cross-linked products, to which belong the previously mentioned polyurethane.
  • Such products possess good dampening characteristics, especially at lower vibration frequencies, which is what one is here especially concerned about.
  • a further advantage of the inventive dampening materials which are employed, especially highly loaded or filled rubber qualities and elastomeric polyurethane, resides in the particularly high wear or abrasion resistance which far exceeds that of polyethylene, also high density polyethylene, without in comparable fashion leading at low temperatures to brittlement-or stress characteristics. Also, the scratch resistance and the puncture tear resistance of the inventive proposed materials is considerably higher than that of polyethylene. Whereas the latter, for instance, possesses a wear or abrasion resistance of 98 mg according to DIN-standard, only 50 mg were removed from a comparable polyurethane mixture under the same conditions.
  • the particularly advantageous embodiment of the invention according to which the entire ski with the exception of steel edges and at least one, preferably two to three elastic insert layers possessing pre-stress essentially consists of the dampening material.
  • Such a ski is advantageously fabricated by directly molding around the inserts possessing the elastic pre-stress, which for instance, can consist of glass fiber reinforced plastic, or by direct vulcanization. in so doing, there do not appear any or only slight problems concerning the adhesion between the inserts and the dampening material which, if desired, can be reduced or overcome by the use of known adhesion promoters or bonding agents.
  • this technique can also be used for the case where there is only provided a single insert member or support formed of dampening material, which is connected with the remaining inserts by direct molding or vulcanization.
  • inventive multi-layered ski can also be used as a water-ski, or for the fabrication of skibobs, or other glide runners.
  • a polyoletin In order to improve the sliding properties of a ski running surface formed of the inventive dampening material, there is further proposed to add to the material approximately 5 percent to about 50 percent, preferably about 10 percent to about 20 percent by weight, of a polyoletin.
  • This polyolefin deposits itself in the elastomeric plastic material, sweats however during the processing temperatures, since it cannot be bound into the material and therefore forms a particularly good sliding surface upon the coating or covering.
  • the polyolefin is added to the polyester or polyether required for the formation of the polyurethane, and the mixture heated to 120 C., whereupon the polyisocyanate required for the formation of the polyurethane is added while stirring, and that finally, the forming or imparting of shape be undertaken in known manner by casting or molding. Due to this procedure the addition or insertion of the polyolefin in the polyurethane is made easier and the distribution is improved.
  • FIGURE is a cross section of the multi-layer ski with respect to the present invention.
  • the multi-layer ski consists of a runner coating 1, steel edges 2, an intermediate bonding layer 3, side surfaces 4, a top surface or coating 5 and a wedge insert 6. It is well understood that the invention is not limited to this example, but that more and different layers, inserts and the like may be provided, of which one or more are made of the inventive dampening material.
  • a multilayered ski comprising at least one member formed of an elastomeric plastic material which possesses a relative dampening of at least 8 percent (measured in accordance with the flexural wave technique at 100 Hz), and wherein the layers of said ski are elastically preloaded and completely encased by the dampening material.
  • dampening material is a semi-rigid polyurethane elastomer.
  • a multilayered ski comprising at least one member formed of an elastomeric plastic material which possesses a relative dampening of at least 8 percent (measured in accordance with the flexural wave technique at Hz), and wherein said at least one member of said ski comprises a runner surface possessing a coating formed of said dampening material.
  • a multilayered ski comprising at least one member formed of an elastomeric plastic material which possesses a relative dampening of at least 8 percent (measured in accordance with the flexural wave technique at 100 Hz), and wherein said at least one member comprises side edges formed of said dampening material.
  • a multilayered ski comprising at least one member formed of an elastomeric plastic material which possesses a relative dampening of at least 8 percent (measured in accordance with the flexural wave technique at 100 Hz), and wherein said dampening material possesses additives for improving the sliding properties of the ski.
  • a multilayered ski comprising at least one member formed of an elastomeric plastic material which possesses a relative dampening of at least 8 percent (measured in accordance with the flexural wave technique at 100 Hz), and wherein the surface of said dampening material is treated so as to possess good sliding properties.

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  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)
US883519A 1968-02-11 1969-12-09 Multilayer ski and method for the fabrication thereof Expired - Lifetime US3698731A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT12049/68A AT296833B (de) 1968-02-11 1968-02-11 Mehrschichtenski und verfahren zu seiner herstellung
AT351969A AT305099B (de) 1969-04-11 1969-04-11 Mehrschichtenski und Verfahren zu seiner Herstellung

Publications (1)

Publication Number Publication Date
US3698731A true US3698731A (en) 1972-10-17

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US883519A Expired - Lifetime US3698731A (en) 1968-02-11 1969-12-09 Multilayer ski and method for the fabrication thereof

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US (1) US3698731A (enrdf_load_stackoverflow)
CH (1) CH528277A (enrdf_load_stackoverflow)
DE (1) DE1961487A1 (enrdf_load_stackoverflow)
FR (1) FR2025877A1 (enrdf_load_stackoverflow)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894745A (en) * 1971-05-14 1975-07-15 Hoechst Ag Ski body made of plastics
US4293142A (en) * 1979-07-16 1981-10-06 K-2 Corporation Vibration damped ski
EP0049736A1 (en) * 1980-07-29 1982-04-21 LAMBORGHINI SCI S.p.A. Running surface for skis
US4412687A (en) * 1978-09-28 1983-11-01 N.V. Bekaert S.A. Ski
US4679179A (en) * 1982-06-15 1987-07-07 Raychem Corporation Sonar detection apparatus
AT388875B (de) * 1987-08-12 1989-09-11 Rohrmoser Alois Skifabrik Ski
US4928989A (en) * 1987-12-09 1990-05-29 Head Sportgeraete Gesellschaft M.B.H. & Co. Ohg Ski having a core comprising angled profiles
US5249819A (en) * 1988-09-23 1993-10-05 Head Sportgerate Gesellschaft M.B.H. & Co., Ohg Ski having a hollow body of uniform width
AT401350B (de) * 1987-02-27 1996-08-26 Salomon Sa Alpinski
US5921564A (en) * 1997-04-22 1999-07-13 Csoc Holdings, Inc. Snow board
US6028136A (en) * 1996-07-24 2000-02-22 Centeiro Trading, Lda Polymeric composition containing fluorographite ski sole, and method of making ski sole
US6121212A (en) * 1998-03-03 2000-09-19 Centeiro Trading Lda Lubricant for improved gliding properties of skis and its application in skiing
US20050082789A1 (en) * 2001-07-10 2005-04-21 Josef Heftberger Light-weight construction core and a method for producing the same
US7763341B2 (en) 2004-01-23 2010-07-27 Century-Board Usa, Llc Filled polymer composite and synthetic building material compositions
US7794224B2 (en) 2004-09-28 2010-09-14 Woodbridge Corporation Apparatus for the continuous production of plastic composites
US20110002190A1 (en) * 2009-07-06 2011-01-06 Boral Material Technologies Inc. Fiber Feed System For Extruder For Use In Filled Polymeric Products
US20110001255A1 (en) * 2009-07-06 2011-01-06 Boral Material Technologies Inc. Vacuum Removal of Entrained Gasses In Extruded, Foamed Polyurethane
US20110086931A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Polyurethanes derived from highly reactive reactants and coal ash
US20110086932A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Polyurethanes derived from lesquerella oil
US20110086934A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Filled polyurethane composites and methods of making same
US20110086933A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Filled polyurethane composites and methods of making same
US20110233901A1 (en) * 2007-05-04 2011-09-29 Mike Olson Snowboard
US8138234B2 (en) 2006-03-24 2012-03-20 Century-Board Usa, Llc Polyurethane composite materials
US20130140795A1 (en) * 2011-12-05 2013-06-06 Skis Rossignol Snow gliding board structure element, and gliding board incorporating such an element
US9745224B2 (en) 2011-10-07 2017-08-29 Boral Ip Holdings (Australia) Pty Limited Inorganic polymer/organic polymer composites and methods of making same
US9752015B2 (en) 2014-08-05 2017-09-05 Boral Ip Holdings (Australia) Pty Limited Filled polymeric composites including short length fibers
US9932457B2 (en) 2013-04-12 2018-04-03 Boral Ip Holdings (Australia) Pty Limited Composites formed from an absorptive filler and a polyurethane
US9988512B2 (en) 2015-01-22 2018-06-05 Boral Ip Holdings (Australia) Pty Limited Highly filled polyurethane composites
US10030126B2 (en) 2015-06-05 2018-07-24 Boral Ip Holdings (Australia) Pty Limited Filled polyurethane composites with lightweight fillers
US10086542B2 (en) 2004-06-24 2018-10-02 Century-Board Usa, Llc Method for molding three-dimensional foam products using a continuous forming apparatus
US10138341B2 (en) 2014-07-28 2018-11-27 Boral Ip Holdings (Australia) Pty Limited Use of evaporative coolants to manufacture filled polyurethane composites
US10472281B2 (en) 2015-11-12 2019-11-12 Boral Ip Holdings (Australia) Pty Limited Polyurethane composites with fillers
US12060473B2 (en) 2018-07-03 2024-08-13 University Of Notre Dame Du Lac Polymer/exfoliated nano-composite films with superior mechanical properties

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503570A2 (fr) * 1980-02-21 1982-10-15 Rossignol Sa Ski
FR2476495A1 (fr) * 1980-02-21 1981-08-28 Rossignol Sa Ski
FR2503569A1 (fr) * 1981-04-09 1982-10-15 Rossignol Sa Ski
FR2587904B1 (fr) * 1985-09-30 1988-03-11 Rossignol Sa Semelle antirecul polyvalente pour ski de fond
AT400678B (de) * 1990-05-09 1996-02-26 Atomic Austria Gmbh Schi
AT412839B (de) * 2000-06-02 2005-08-25 Atomic Austria Gmbh Gleitvorrichtung, insbesondere schi, snowboard oder dgl.

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894745A (en) * 1971-05-14 1975-07-15 Hoechst Ag Ski body made of plastics
US4412687A (en) * 1978-09-28 1983-11-01 N.V. Bekaert S.A. Ski
US4293142A (en) * 1979-07-16 1981-10-06 K-2 Corporation Vibration damped ski
EP0049736A1 (en) * 1980-07-29 1982-04-21 LAMBORGHINI SCI S.p.A. Running surface for skis
US4679179A (en) * 1982-06-15 1987-07-07 Raychem Corporation Sonar detection apparatus
AT401350B (de) * 1987-02-27 1996-08-26 Salomon Sa Alpinski
AT388875B (de) * 1987-08-12 1989-09-11 Rohrmoser Alois Skifabrik Ski
US4928989A (en) * 1987-12-09 1990-05-29 Head Sportgeraete Gesellschaft M.B.H. & Co. Ohg Ski having a core comprising angled profiles
US5249819A (en) * 1988-09-23 1993-10-05 Head Sportgerate Gesellschaft M.B.H. & Co., Ohg Ski having a hollow body of uniform width
US6028136A (en) * 1996-07-24 2000-02-22 Centeiro Trading, Lda Polymeric composition containing fluorographite ski sole, and method of making ski sole
US5921564A (en) * 1997-04-22 1999-07-13 Csoc Holdings, Inc. Snow board
US6121212A (en) * 1998-03-03 2000-09-19 Centeiro Trading Lda Lubricant for improved gliding properties of skis and its application in skiing
US20050082789A1 (en) * 2001-07-10 2005-04-21 Josef Heftberger Light-weight construction core and a method for producing the same
US7077418B2 (en) * 2001-07-10 2006-07-18 Fischer Gesellschaft M.B.H. Light-weight construction core and a method for producing the same
US7763341B2 (en) 2004-01-23 2010-07-27 Century-Board Usa, Llc Filled polymer composite and synthetic building material compositions
US7794817B2 (en) 2004-01-23 2010-09-14 Century-Board Usa Llc Filled polymer composite and synthetic building material compositions
US7993552B2 (en) 2004-01-23 2011-08-09 Century-Board Usa Llc Filled polymer composite and synthetic building material compositions
US7993553B2 (en) 2004-01-23 2011-08-09 Century-Board Usa Llc Filled polymer composite and synthetic building material compositions
US10889035B2 (en) 2004-06-24 2021-01-12 Century-Board Corporation Method for molding three-dimensional foam products using a continuous forming apparatus
US10086542B2 (en) 2004-06-24 2018-10-02 Century-Board Usa, Llc Method for molding three-dimensional foam products using a continuous forming apparatus
US7794224B2 (en) 2004-09-28 2010-09-14 Woodbridge Corporation Apparatus for the continuous production of plastic composites
US9512288B2 (en) 2006-03-24 2016-12-06 Boral Ip Holdings Llc Polyurethane composite materials
US8138234B2 (en) 2006-03-24 2012-03-20 Century-Board Usa, Llc Polyurethane composite materials
US8299136B2 (en) 2006-03-24 2012-10-30 Century-Board Usa, Llc Polyurethane composite materials
US9139708B2 (en) 2006-03-24 2015-09-22 Boral Ip Holdings Llc Extrusion of polyurethane composite materials
US8511704B2 (en) 2007-05-04 2013-08-20 Mervin Manufacturing, Inc. Snowboard
US20110233901A1 (en) * 2007-05-04 2011-09-29 Mike Olson Snowboard
US20110001255A1 (en) * 2009-07-06 2011-01-06 Boral Material Technologies Inc. Vacuum Removal of Entrained Gasses In Extruded, Foamed Polyurethane
US20110002190A1 (en) * 2009-07-06 2011-01-06 Boral Material Technologies Inc. Fiber Feed System For Extruder For Use In Filled Polymeric Products
US20110086933A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Filled polyurethane composites and methods of making same
US20110086932A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Polyurethanes derived from lesquerella oil
US8846776B2 (en) 2009-08-14 2014-09-30 Boral Ip Holdings Llc Filled polyurethane composites and methods of making same
US9481759B2 (en) 2009-08-14 2016-11-01 Boral Ip Holdings Llc Polyurethanes derived from highly reactive reactants and coal ash
US20110086934A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Filled polyurethane composites and methods of making same
US20110086931A1 (en) * 2009-08-14 2011-04-14 Boral Material Technologies Inc. Polyurethanes derived from highly reactive reactants and coal ash
US9745224B2 (en) 2011-10-07 2017-08-29 Boral Ip Holdings (Australia) Pty Limited Inorganic polymer/organic polymer composites and methods of making same
US20130140795A1 (en) * 2011-12-05 2013-06-06 Skis Rossignol Snow gliding board structure element, and gliding board incorporating such an element
US8827301B2 (en) * 2011-12-05 2014-09-09 Skis Rossignol Snow gliding board structure element, and gliding board incorporating such an element
US10324978B2 (en) 2013-04-12 2019-06-18 Boral Ip Holdings (Australia) Pty Limited Composites formed from an absorptive filler and a polyurethane
US9932457B2 (en) 2013-04-12 2018-04-03 Boral Ip Holdings (Australia) Pty Limited Composites formed from an absorptive filler and a polyurethane
US10138341B2 (en) 2014-07-28 2018-11-27 Boral Ip Holdings (Australia) Pty Limited Use of evaporative coolants to manufacture filled polyurethane composites
US9752015B2 (en) 2014-08-05 2017-09-05 Boral Ip Holdings (Australia) Pty Limited Filled polymeric composites including short length fibers
US9988512B2 (en) 2015-01-22 2018-06-05 Boral Ip Holdings (Australia) Pty Limited Highly filled polyurethane composites
US10030126B2 (en) 2015-06-05 2018-07-24 Boral Ip Holdings (Australia) Pty Limited Filled polyurethane composites with lightweight fillers
US10472281B2 (en) 2015-11-12 2019-11-12 Boral Ip Holdings (Australia) Pty Limited Polyurethane composites with fillers
US12060473B2 (en) 2018-07-03 2024-08-13 University Of Notre Dame Du Lac Polymer/exfoliated nano-composite films with superior mechanical properties

Also Published As

Publication number Publication date
CH528277A (de) 1972-09-30
FR2025877A1 (enrdf_load_stackoverflow) 1970-09-11
DE1961487A1 (de) 1970-07-09

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