EP0179890A1 - Tete de raquette pour une raquette de tennis de table - Google Patents

Tete de raquette pour une raquette de tennis de table

Info

Publication number
EP0179890A1
EP0179890A1 EP85902517A EP85902517A EP0179890A1 EP 0179890 A1 EP0179890 A1 EP 0179890A1 EP 85902517 A EP85902517 A EP 85902517A EP 85902517 A EP85902517 A EP 85902517A EP 0179890 A1 EP0179890 A1 EP 0179890A1
Authority
EP
European Patent Office
Prior art keywords
racket
wood
layers
blade
multifilament
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.)
Withdrawn
Application number
EP85902517A
Other languages
German (de)
English (en)
Inventor
Adolf K. W. Stroh
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0179890A1 publication Critical patent/EP0179890A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
    • A63B59/40—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
    • A63B59/40—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis
    • A63B59/42—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis with solid surfaces
    • A63B59/45—Rubber parts thereof; characterised by bonding between a rubber part and the racket body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/10—Next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/042—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/16—Table tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/023—Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2313/00—Elements other than metals
    • B32B2313/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2377/00—Polyamides

Definitions

  • the invention relates to a racket blade for a table tennis racket with at least two wood layers and an adhesive layer containing a fiber material for reinforcement between each two adjacent wood layers.
  • an adhesive layer for reinforcement can contain a fiber material, such as carbon fibers or glass fibers, in order in this way to achieve the flexibility of the racket blade required by the table tennis rules.
  • a fiber material such as carbon fibers or glass fibers
  • the invention has for its object to improve a racket blade of the type specified in such a way that an inflexible racket blade is obtained which adheres to the Tichtennis rules, which is significantly lighter than the previously available racket blades.
  • This object is achieved in a racket blade of the type specified according to the invention in that the wood layers consist of balsa wood and in that the fiber material consists of multifilament bundles of aramid and carbon fibers.
  • the basic idea of the present invention is to achieve the required stiffness or inflexibility of the racket blade despite the severe restrictions that result from the table tennis rules in this regard, essentially with the aid of the adhesive layers containing the fiber material and thus the possibility of using the extremely light To open balsa wood, the mechanical strength of which is extremely low by nature It has been shown that when using multifilament bundles made of aramid fibers and carbon fibers to reinforce the adhesive layers, the required mechanical strength of the bat blade can also be achieved with balsa wood and that there is also the advantage that the pads of the bat blade have the same damping effect for the striking table tennis balls, in particular with a suitable choice of the orientation of the multifilament bundle, can be made thinner, since in this case the outer layers of balsa wood, due to the properties of the balsa wood, contribute significantly more to damping than the wood layers of harder types of wood, in particular if the outer wood layers in an embodiment of the invention a little thicker than the inner wood layers of the club blade. (Depending on the position or the orientation
  • the multifilament bundles are arranged, at least essentially parallel to one another, in particular in a flat position, in such a way that the thickness of the layer is equal to the diameter of the multifilament bundle, so that, for example, with a bundle diameter of 0, 13 mm adhesive layers with a total thickness of 0.15 mm can be realized, an epoxy resin preferably being used as the adhesive.
  • multifilament bundles of monofilaments with a diameter of approximately 10 ⁇ m are preferably used for the reinforcement.
  • each individual bundle contains only one type of fiber and if multifilament bundles made of aramid fibers and multifilament bundles made of carbon fibers follow one another in alternation.
  • the multifilament bundles can optionally be arranged in a star shape, starting from the center of the racket blade.
  • Figure 1 is a plan view of a table tennis racket.
  • FIG. 2 shows a partial cross section through the table tennis racket according to FIG. 1 along the line 2-2 in this figure;
  • Fig. 3 shows a greatly enlarged section A of Fig. 2 and
  • FIG. 4 is an end view of the detail of FIG. 3, seen in the direction of arrow B in this figure.
  • 1 shows a table tennis racket 10 which has a racket blade 12 according to the invention as the main element.
  • the club blade 12 is provided on its two main surfaces with a covering 14 which is glued to the club blade 12 via an adhesive layer 16.
  • the coverings 14 in FIGS. 1 and 2 are set back somewhat inwards relative to the outer edge of the club blade 12 with the aim of a clearer drawing, although in practice they usually end flush with the outer edge or with the narrow side of the club blade, which is usually covered with a circumferential tape (not shown).
  • the saw blade 14 of the racket blade 12 can consist of nub rubber or sandwich rubber in the usual way and are selected by the respective player in accordance with his playing technique, whereby different coverings are often chosen for the two sides of the table tennis bat. Furthermore, the club blade 12 is provided with glued-on grip parts 13 in the region of its grip extension 12a.
  • the club blade 12 itself consists of a plurality of wood layers 20 which are connected to one another via adhesive layers 22 located therebetween, a plurality of inner wood layers 20 generally being arranged between the outer wood layers 20 to which the coverings 14 are glued , as indicated in Fig. 2.
  • the number of inner Layers of wood depend on the total thickness of the club blade 12 and can fluctuate between about two and sixteen at club blade thicknesses between approximately 2.5 and 8 mm.
  • the adhesive layers 22 contain multifilament bundles 24 for reinforcement, which, as is particularly clear from FIGS. 3 and 4, are embedded in an adhesive matrix 26, which preferably consists of an epoxy resin.
  • the multifilament bundles 24 are preferably arranged parallel to one another in a single layer and have a diameter which is only insignificantly smaller than the total thickness of the adhesive layer 22, so that the multifilament bundles 24, which are preferably alternately composed of aramid and carbon monofilaments or fibers consist, develop an extraordinarily high reinforcing effect and thus result in a club blade 20 with sufficient rigidity even when using the light, mechanically less resistant balsa wood for the wood layers 20.
  • the multifilament bundles 24 can have a diameter of 0.13 mm, while the total height of an adhesive layer 22 is only 0.15 mm, so that the thickness of the adhesive matrix between the individual multifilament bundles 24 and the adjacent wood layers 20 is only a maximum of 0.02 mm and can be on average 0.01 mm and thus is in the order of the diameter of a monofilament.
  • the ratio of aramid fibers to carbon fibers is preferably about 1: 1 - according to the invention, the weight of the club blade compared to the lightest, previously available club blades same dimensions, for example with a club blade thickness of 4 mm, of about 80 g. reduce about 30 g.
  • the thickness of the coverings can also be reduced, in particular if the outer wood layers are made somewhat thicker, for example with a thickness of 0.8 mm, than the inner wood layers, which for example have a thickness of approximately 0 , 6 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Laminated Bodies (AREA)
  • Golf Clubs (AREA)

Abstract

Tête de raquette pour une raquette de tennis de table avec plusieurs couches de bois (20) entre lesquelles est prévue une couche de colle (26) contenant un matériau de fibre (24) pour le renforcement. Conformément à la présente invention, le matériau de fibre (24) se compose de faisceaux à multifilaments à base de fibres d'aramide et de carbone, alors que les couches de bois (20) sont en bois de balsa, afin d'obtenir une tête de raquette extraordinairement légère.
EP85902517A 1984-05-12 1985-05-10 Tete de raquette pour une raquette de tennis de table Withdrawn EP0179890A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843417728 DE3417728A1 (de) 1984-05-12 1984-05-12 Schlaegerblatt fuer einen tischtennisschlaeger
DE3417728 1984-05-12

Publications (1)

Publication Number Publication Date
EP0179890A1 true EP0179890A1 (fr) 1986-05-07

Family

ID=6235711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85902517A Withdrawn EP0179890A1 (fr) 1984-05-12 1985-05-10 Tete de raquette pour une raquette de tennis de table

Country Status (3)

Country Link
EP (1) EP0179890A1 (fr)
DE (1) DE3417728A1 (fr)
WO (1) WO1985005281A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0701844A3 (fr) * 1994-09-14 1996-05-29 Umberto Fassio Raquette de tennis de table à structure différenciée
WO2008094079A1 (fr) * 2007-01-30 2008-08-07 Stiga Sports Ab Corps de raquette de tennis de table
DE102007047453A1 (de) * 2007-10-03 2009-04-09 Joachim Josef Nolte Tischtennisschläger und Verfahren zum Herstellen eines Tischtennisschlägers
JP6535065B2 (ja) * 2017-11-07 2019-06-26 株式会社タマス 卓球ラケットのブレード

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1436436A (en) * 1973-11-03 1976-05-19 Dunlop Ltd Table-tennis bats
JPS5215734A (en) * 1975-07-24 1977-02-05 Nippon Tatsukiyuu Kk Table tennis racket
DE7538642U (de) * 1975-12-04 1976-04-01 Sigri Elektrographit Gmbh, 8901 Meitingen Tischtennisschlaeger
US4324400A (en) * 1979-08-08 1982-04-13 Est Industries, Inc. Table tennis bat blade
DE7936785U1 (de) * 1979-12-31 1980-04-03 Schneider, Michael, 5450 Neuwied Tischtennis-Holz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8505281A1 *

Also Published As

Publication number Publication date
DE3417728A1 (de) 1985-11-14
WO1985005281A1 (fr) 1985-12-05

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