WO2010079191A1 - Article de sport en bois modifié thermiquement - Google Patents

Article de sport en bois modifié thermiquement Download PDF

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Publication number
WO2010079191A1
WO2010079191A1 PCT/EP2010/050095 EP2010050095W WO2010079191A1 WO 2010079191 A1 WO2010079191 A1 WO 2010079191A1 EP 2010050095 W EP2010050095 W EP 2010050095W WO 2010079191 A1 WO2010079191 A1 WO 2010079191A1
Authority
WO
WIPO (PCT)
Prior art keywords
area
wood
impact
sports device
thermally modified
Prior art date
Application number
PCT/EP2010/050095
Other languages
German (de)
English (en)
Inventor
Michael Schneider
Original Assignee
Tt-Tuning Center Gmbh
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 Tt-Tuning Center Gmbh filed Critical Tt-Tuning Center Gmbh
Priority to JP2011544860A priority Critical patent/JP2012514508A/ja
Priority to CN2010800042343A priority patent/CN102271769A/zh
Publication of WO2010079191A1 publication Critical patent/WO2010079191A1/fr

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
    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/10—Non-metallic shafts
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/08—Handles characterised by the material
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/10—Handles with means for indicating correct holding positions
    • 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
    • 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
    • A63B2102/32—Golf
    • 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
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles

Definitions

  • the invention relates to a sports device according to the preamble of claim 1.
  • the perception of the course of use of the sports equipment is strongly influenced by the materials used, in particular those in the construction of the striking area. This applies especially to wood as a material and leads to previous attempts to replace the material wood in the field of impact of the sports equipment - are also accompanied by little acceptance - regardless of normative regulations.
  • sports equipment is usually tuned to the preferences and needs of the user, so that by customization of the sports equipment, an improvement of the usage for a specific user is achieved.
  • material-related limits are set by the material wood, which concern, for example, the weight and the strength of the construction.
  • the robustness of the striking area is structurally difficult to achieve by the nature of the wood, the robustness also relates to the weather protection, especially if the sport is preferably practiced outside closed spaces.
  • the natural material wood also makes it necessary to comply with special boundary conditions - in particular regarding temperature and humidity.
  • the use of high quality woods e.g. in the form of so-called tropical wood a not inconsiderable cost factor.
  • Object of the present invention is therefore to improve a sports equipment according to the preamble of claim 1, structurally robust to make and its production inexpensive and easy to enable.
  • the sports equipment in particular designed as a table tennis or golf club, has a grip area and a striking area connected to the grip area.
  • the impact area consists at least partially of a wood which has been thermally modified.
  • thermal modification is generally meant a permanent one
  • This wood in its material properties is changed so that it compared to an untreated wood of the same species has a flexural strength increase of up to 45%, while weight reduction of up to 10%. Moreover, there is an increased resistance to environmental influences, which allows advantageous processing and use of the wood.
  • the thermally modified wood has a reduced swelling and shrinkage and the compensation moisture is reduced by up to 70%. Likewise, there are advantages in the processing because internal stresses of the wood are degraded during the thermal treatment and an excellent dimensional stability is achieved.
  • thermally modified wood according to the invention makes it possible to adapt the course of use to individual needs, to make the construction more robust than conventional wood and to reduce the production costs.
  • the thermally modified wood is arranged on the outer visible boundary surfaces of the impact area.
  • an outer surface is created, which is extremely dimensionally stable and robust and in particular has improved dimensional stability.
  • it can also be provided to extend the use of thermowood on the handle area, so that even this not insignificant for the game area the dimensional stability of the thermally modified wood comes to good.
  • the sports equipment is preferably designed weatherproof. The above-described basic weather resistance of the thermowood by reduced water absorption and low swelling and Schwindson offers a cost-effective way with structurally little effort and thus hardly changing the usage process measures to produce the weather resistance of the sports equipment.
  • the sports device has a core area which is completely covered with a plastic film.
  • the ratio of the thickness of the film to the thickness of the core region is less than 1: 9 in at least two mutually perpendicular spatial directions.
  • this is one way to design and improve the weather resistance.
  • it is also possible to produce a special surface finish, for example for the permanent connection of further elements of the impact area.
  • the sheath designed in conjunction with thermally modified wood due to the material properties.
  • the changes in the characteristics of the field of impact of the sports equipment by this shroud are barely perceptible.
  • further improvements are conceivable.
  • the impact area may at least partially have a region made of conventional wood.
  • An embodiment of the invention also does not exclude an extension of the use of conventional woods on the grip area, which may lead under certain circumstances to an improved weight distribution.
  • the impact area consists of several layers. Likewise, this is conceivable for the grip area. Both may require adaptation and tuning of the damping performance of the sports equipment when performing a strike and, moreover, this structure simplifies a purposeful modification of the characteristics of the strike area.
  • the boundary surfaces of the layers are oriented plane-parallel in at least one Jardinriehtung.
  • the plane-parallel orientation of the layers is perpendicular to a preferred direction of the impact area.
  • targeted coordination measures prove to be particularly simple.
  • the impact properties of the impact area are adjusted by the material selection of the layer system.
  • a weight adjustment takes place via the material selection of the layer system.
  • the impact area consists of at least three layers.
  • this may be a thicker compared to the other layers carrier layer, which determines the weight and the strength of the structure substantially.
  • at least two further layers are advantageously combined with this carrier layer in order to be able to adapt the damping behavior by material selection in a targeted manner.
  • the impact area has a layer
  • composite materials which are known especially by their tensile strength and their low weight.
  • carbon, aramid or glass fiber prove to be suitable, but also metallic materials such as e.g. Titanium.
  • metallic materials such as e.g. Titanium.
  • This allows a stiffer construction with almost unchanged overall weight and therefore contributes significantly to the individual adjustment of the bumping properties of the sports equipment.
  • the use of these materials is not limited to the impact area. For example, it is also conceivable to equip the grip area with these materials, even in a different form of a layer structure.
  • a further aspect of the invention is to specify a method for weight reduction of a sports device having a grip area and a striking area connected to the grip area, wherein the sports device is at least partially constructed of wood. This is taken into account by a method according to claim 12, and provides to replace a substantially wood existing area by a section of thermally modified wood identical or lower flexural elasticity, so that a construction of identical or higher bending strength with significantly reduced weight is the result.
  • a further object underlying the inventive concept is, moreover, to specify a method for increasing the flexural strength of a sports device having a grip area and a striking area connected to the grip area, wherein the sports device is constructed at least partially from wood.
  • a further object of the present invention is to provide a method which advantageously ensures a durable and environmentally resistant connection of the materials of the impact area.
  • a method for producing a sports device with a grip area and a striking area connected to the grip area sees in the case of a layered
  • thermowood It is with this method a way to create a durable durable and especially weatherproof compound of the layers of sports equipment, the method by eliminating or reducing the duration Moreover, possible baking steps by the use of thermowood is much easier.
  • FIG. 1 shows exemplary embodiments of sports equipment according to the invention, as
  • FIG. 2 schematically shows a possible layer structure of the impact area.
  • FIG. 3 shows a further performance example of a layer structure of FIG.
  • FIG. 4 shows a further variant of the striking area.
  • FIG. 5 shows the schematic structure of a table tennis racket
  • FIG. 6 shows a further exemplary embodiment of a layer construction of the
  • Sporting devices 1 according to the invention for example in the form of a table tennis racket or a golf club, are shown in FIG. These have a striking area 100 and a grip area 200 connected to the striking area.
  • the design of the impact area 100 is provided according to the invention at least partially with a thermally modified wood.
  • Embodiment of a table tennis racket shown which in the handle portion 200 with two handles 201, 202 and whose impact area 100 in the form of a base plate with handle transition areas 220, 230 is executed.
  • This base plate is also part of the grip area 200. Due to the above-described properties of thermowood, there are various advantages for the use, construction and manufacture of a sports device 1 according to the invention.
  • the thermally modified wood is provided on the externally visible boundary surfaces of the impact area 100.
  • this also particularly advantageously includes the area which is usually covered by a foamed, rubber-like covering.
  • the outer surface thus formed proves extremely dimensionally stable, which opens up design freedom for the internal structure of the impact area 100. Due to the low swelling and Schwindneses and the low absorption of compensatory moisture beyond constant characteristics of the impact area 100 are given under all environmental conditions, so that the play characteristics hardly change. In particular, this also applies to periods which correspond approximately to the lifetime of the sports equipment 1, since volatile ingredients and resins have been substantially removed during the thermal modification of the wood.
  • thermowood in the form of a compensating moisture content reduced by up to 70% significantly improve the weather resistance.
  • the arrangement of the thermowood on the outer surfaces of the impact area 100 thus provides a climate buffer, which also provides a basic weather protection.
  • the weather resistance may be extended to the entire sports equipment.
  • it may also be provided to use the thermally modified wood in the grip region 200.
  • An all-weather weatherproof design also means that no new weather-sensitive areas arise due to decomposition. Overall, this contributes to the longevity of the sports equipment.
  • the weatherproof design in the form of thermally modified wood does not exclude the use of additional measures to achieve the weather resistance.
  • the thermal wood offers the possibility of largely dispensing with the use of secondary protection agents in the area of the wood.
  • it may be provided to arrange the thermally modified wood in the core area or center of the impact area 100, preferably also in addition to the above-described sheathing of the impact area 100 with thermowood.
  • the fungus resistance of the thermally modified wood eliminates the need for impregnation with a fungicidal agent.
  • a weatherproof coating e.g. in the field of thermally modified wood, is applied.
  • thermally modified wood reduces the dependence on supplementary weather protection measures. Especially in case of minor mechanical damage e.g. In the area of the protective lacquer layer the weather resistance is still guaranteed.
  • the additives to achieve the weather resistance of a certain volatility which is reflected on the one hand in a burden on the environment and on the other hand endangering the durability of the sports equipment 1.
  • the use of thermally modified wood, for example on the outer surfaces of the sports equipment 1, in conjunction with weatherproof adhesive and paint materials provides an identical design of the other weather protection measures an improved durability forecast, which is not significantly deteriorated, especially by minor damage. Therefore, it is additionally provided that the adhesive and paint materials used are also designed weatherproof.
  • the weather protection can additionally be achieved by means of a foil 115 -for example made of PU, PVC or PE-which completely surrounds a region of the impact area 100.
  • the thickness of the film 1 15 is negligible compared to the thickness of the coated area. It is preferably between 1 ⁇ m and 1 mm and more preferably between 20 ⁇ m and 500 ⁇ m.
  • a weatherproof core area is provided, on the outside of which preferably a thermally modified wood 141, 142 is attached, so that a weatherproof complete enclosure of the impact area is formed.
  • the play properties are hardly noticeably changed by the film 115 formed thinly relative to the core region 150, in that the ratio of the thickness of the film to the thickness of the core region 50 is less than 1: 9 in at least two mutually perpendicular spatial directions. And moreover, these characteristics can be adjusted by the configuration of the core region 150.
  • a unique weather resistance, with respect to a conventional construction almost unchanged impact properties, given.
  • this film can serve for permanent coating of the impact area 100 and thus form a mounting base for further individual adjustments of the impact area 100.
  • the use of the film is provided as a mounting base for a foam material.
  • the impact area 100 has at least partially conventional wood.
  • thermally modified woods have significantly altered material properties, so that the combination with conventional woods the diversity of
  • the impact region 100 is formed from a plurality of layers 110-114. It proves to be advantageous to define a preferred direction for the derivation of forces by a layer system. This is clarified again in FIG. 2, in particular by the illustrated layer structure two preferred directions 131 and 132 set »which show the force deflection in different directions.
  • the force deflection is determined by the bending elasticity of the layered materials, so that use of the thermally modified wood in one of these layers, for example, opens up the possibility of selectively adjusting the force deflection and preferably increasing the force in the direction of the object to be hammered.
  • these are preferably the outer layers 112 and 114.
  • the boundary surfaces of the layers 112-114 have a plane-parallel orientation in at least one spatial direction 120, wherein the direction of the plane-parallel orientation 120 is perpendicular to a preferred direction 130 of the impact area 100.
  • the direction of the plane-parallel orientation 120 is perpendicular to a preferred direction 130 of the impact area 100.
  • the possibility is provided with the help of the layer thickness to create different flexural elasticity regions, which - in combination - lead to an altered flexural elasticity and bending dynamics through a modified natural frequency spectrum of the overall system.
  • it can be provided to make an adjustment of the impact properties in a preferred direction of collapse by varying the thickness of the thermally modified wood.
  • the adjustment of the impact properties of the layer system 110-114 takes place through the selection of the materials of the system. In particular, at fixed layer thicknesses leads
  • thermally modified wood usually to an increase in the so-called return height.
  • a replacement of a wood with high specific gravity such as oak, Wenge, Rio-rosewood or Azobe with a density of 600-1200 kg / m 3 by a thermally modified wood of a lighter wood species such as balsa, Ayous or fir with a Bulk density of 100 - 500 kg / m 3 be provided.
  • the use of the thermally modified wood thus leads to a weight reduction of the construction.
  • the bending elasticity of the thermally modified wood is comparable to wood species, which have a significantly higher specific gravity.
  • it can be provided, for example, to replace a relatively heavy wood with a lighter thermally modified wood with identical or higher bending strength with almost unchanged construction and unchanged properties. This can serve, for example, to adapt the weight distribution by means of a suitable choice of material.
  • the weight of a table tennis racket of usually 90-14Og for the case of hard woods in the range of 70-110g can be reduced and in the case of soft woods of usually 60-85g in the range 45-75g.
  • the layer system 110-114 - as shown in Figure 3 - consists of at least three layers.
  • a carrier layer 110 This layer, which is usually thicker than the further layers 111-114, is essentially the weight of the Hit area 100 set.
  • Planar parallel to the carrier layer advantageously more layers are arranged symmetrically.
  • the contact time of the object to be hit or hit with the sports equipment 1 is of crucial importance for the influencing possibilities of the object. Therefore, it is advisable to provide a layer 111 or 1 12, which is designed to increase the above contact time and therefore has a high flexural elasticity.
  • a layer 111 or 1 which is designed to increase the above contact time and therefore has a high flexural elasticity.
  • a layer 111 or 1 which is designed to increase the above contact time and therefore has a high flexural elasticity.
  • a layer 111 or 1 which is designed to increase the above contact time and therefore has a high flexural elasticity.
  • a layer 111 or 1 which is designed to increase the above contact
  • this layer has thermally modified wood.
  • the impact 100 or handle region 200 comprises composite materials such as carbon, aramid, glass fiber or titanium. These composites are known especially for their tensile strength. In combination with thermally modified wood, it is possible to put together layers that achieve the bending elasticity of woods with a high specific weight. However, the dead weight of the thermo-wood composite layer is only a fraction of the weight of the replaced wood, which creates enormous potential for weight reduction.
  • the above-described adaptation possibilities for increasing the flexural strength or weight reduction are not limited to a stratified impact area 100 of the sports equipment 1 according to the invention. Such is for example Generally conceivable in a method for weight reduction to carry out a replacement of a substantially constructed of wood area with a substantially formed of thermally modified wood section equal or higher bending strength. This usually causes a construction with comparable stability but reduced weight.
  • a replacement of a section constructed essentially of wood with a section of identical type of wood formed essentially of thermally modified wood in a sports device This opens up the possibility to increase the strength and in particular to achieve a stiffer design of the construction in a simple and cost-effective manner.
  • the design effort is thereby significantly reduced, since no further structural measures such as, for example, partial thickening or the design of the sports equipment 1 incurred with support elements.
  • Hot lamination is usually understood as the melting of an adhesive material at temperatures greater than 100 0 C, added to a certain pressure for the connection of the components of the laminate, which comprises at least two layers.
  • weatherproof laminate connections for example by using an appropriate plastic film or weatherproof resin as the adhesive material.
  • a core area can be laminated in a plastic film, so that a weather protection for this core area is given in a simple manner.
  • the hot lamination of the top coat does not exclusively refer to the use of a plastic film.
  • the possibility is created to adapt the impact properties of a sports device specifically to the needs of the user and thus to improve weight, to make the sports equipment robust and durable and to keep the production cost.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)
  • Laminated Bodies (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

L'invention concerne un article de sport (1), en particulier une raquette de tennis de table ou un club de golf, avec une zone de prise et avec une zone de frappe (100) reliée à la zone de prise (200). La zone de frappe (100) est au moins partiellement faite dans un bois qui a été modifié thermiquement.
PCT/EP2010/050095 2009-01-08 2010-01-07 Article de sport en bois modifié thermiquement WO2010079191A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2011544860A JP2012514508A (ja) 2009-01-08 2010-01-07 熱変性木材製のスポーツ用品アイテム
CN2010800042343A CN102271769A (zh) 2009-01-08 2010-01-07 由热改性木制成的运动器械

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202009000321.3 2009-01-08
DE202009000321U DE202009000321U1 (de) 2009-01-08 2009-01-08 Tischtennis-Holz aus Thermoholz
DE102009042695A DE102009042695A1 (de) 2009-01-08 2009-09-23 Sportgerät aus thermisch modifiziertem Holz
DE102009042695.7 2009-09-23

Publications (1)

Publication Number Publication Date
WO2010079191A1 true WO2010079191A1 (fr) 2010-07-15

Family

ID=40621556

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/050095 WO2010079191A1 (fr) 2009-01-08 2010-01-07 Article de sport en bois modifié thermiquement

Country Status (5)

Country Link
JP (1) JP2012514508A (fr)
KR (1) KR20110110148A (fr)
CN (1) CN102271769A (fr)
DE (2) DE202009000321U1 (fr)
WO (1) WO2010079191A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204505A1 (de) 2012-03-21 2013-09-26 Michael Schneider Flächiges Element zum Bilden eines Teils eines Sportgeräts oder Musikinstruments

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH184937A (de) * 1935-12-20 1936-06-30 Schuerch Paul Verfahren zum Härten von Holz.
US2203589A (en) * 1937-05-13 1940-06-04 Spalding A G & Bros Inc Treatment of wood
US3535795A (en) * 1968-09-06 1970-10-27 Varian Associates Process of drying lithocarpus densiflora rehd. (tanoak) wood with radio wave energy
EP0673732A1 (fr) * 1993-07-12 1995-09-27 Ibiden Co, Ltd. Bois de construction stratifie, procede et dispositif de production
DE102005047362A1 (de) * 2005-10-04 2007-04-12 Basf Ag Herstellung modifizierter Lignocellulosematerialien
CN101274135A (zh) * 2008-05-20 2008-10-01 卢卿其 乒乓球底板
CN101279458A (zh) * 2008-05-15 2008-10-08 华南理工大学 一种无机复合板材及其制备方法和应用

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH184937A (de) * 1935-12-20 1936-06-30 Schuerch Paul Verfahren zum Härten von Holz.
US2203589A (en) * 1937-05-13 1940-06-04 Spalding A G & Bros Inc Treatment of wood
US3535795A (en) * 1968-09-06 1970-10-27 Varian Associates Process of drying lithocarpus densiflora rehd. (tanoak) wood with radio wave energy
EP0673732A1 (fr) * 1993-07-12 1995-09-27 Ibiden Co, Ltd. Bois de construction stratifie, procede et dispositif de production
DE102005047362A1 (de) * 2005-10-04 2007-04-12 Basf Ag Herstellung modifizierter Lignocellulosematerialien
CN101279458A (zh) * 2008-05-15 2008-10-08 华南理工大学 一种无机复合板材及其制备方法和应用
CN101274135A (zh) * 2008-05-20 2008-10-01 卢卿其 乒乓球底板

Also Published As

Publication number Publication date
DE102009042695A1 (de) 2010-07-15
DE202009000321U1 (de) 2009-05-07
JP2012514508A (ja) 2012-06-28
KR20110110148A (ko) 2011-10-06
CN102271769A (zh) 2011-12-07

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