EP1924331B1 - Zelluloidfreier tischtennisball - Google Patents

Zelluloidfreier tischtennisball Download PDF

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Publication number
EP1924331B1
EP1924331B1 EP06805719A EP06805719A EP1924331B1 EP 1924331 B1 EP1924331 B1 EP 1924331B1 EP 06805719 A EP06805719 A EP 06805719A EP 06805719 A EP06805719 A EP 06805719A EP 1924331 B1 EP1924331 B1 EP 1924331B1
Authority
EP
European Patent Office
Prior art keywords
tennis ball
shell
ball according
principal component
celluloid
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.)
Revoked
Application number
EP06805719A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1924331A1 (de
Inventor
In Sook Yoo
Thomas Wollheim
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.)
In Sook Yoo International Project Management - IPM
Original Assignee
In Sook Yoo International Project Management - IPM
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37547080&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1924331(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by In Sook Yoo International Project Management - IPM filed Critical In Sook Yoo International Project Management - IPM
Publication of EP1924331A1 publication Critical patent/EP1924331A1/de
Application granted granted Critical
Publication of EP1924331B1 publication Critical patent/EP1924331B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B39/00—Hollow non-inflatable balls, i.e. having no valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the invention is directed to a celluloid-free table tennis ball, preferably with a diameter of 38.5 to 48 mm, a weight between 2.0 and 4.5 grams and a shell thickness (approximately) between 0.20 mm and 1.30 mm, wherein the shell is made of plastic, whose main component is an organic, uncrosslinked polymer, and on the other hand to a method for producing such a table tennis ball.
  • Diameter and weight are properties largely defined by the International Rules, the rolling behavior is a specified and desired quality, while the mechanical properties defined according to FIGS. 4 to 8 describe the properties of the previously used celluloid ball.
  • the organic polymer has no nitrogen atoms outside the main chain. Such nitration changes the material properties rather negatively.
  • thermoplastic with a homogeneous structure without fillers and / or reinforcing materials, which can be processed better than inhomogeneous substances.
  • the main constituent of the substance according to the invention should have the lowest possible water absorption, in particular a water absorption under normal conditions according to DIN EN ISO 62 of less than 1.0%. This excludes uncontrolled sources.
  • the ball pressure hardness according to DIN EN ISO 2039-1 of the main constituent of the substance according to the invention should be 120 MPa or above, so that it can be used to produce a table tennis ball corresponding to the usual requirements.
  • the invention recommends to use such substances whose main component has a density according to DIN EN ISO 1183 of 1.22 g / cm 3 or more.
  • the weight of a table tennis ball can be optimally adjusted in the given shell cross-section.
  • the main constituent of the substance of the invention should have a continuous use temperature of 80 ° C or more (engineering thermoplastic, high temperature thermoplastic) to be sufficiently resistant to thermal stress. Even better suited Substances whose main component has a continuous service temperature of 150 ° C or more (high temperature thermoplastic).
  • the main component is semicrystalline, can be adjusted by the partial parallel alignment of the polymer chains high stability, which is important especially in the relatively thin shell.
  • the main constituent of the shell is one of the following substances: polyoxymethylene (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polysulfone (PSU), polyetherimide (PEI), polyetheretherketone (PEEK), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polytrimethylene terephthalate (PTT), or a copolymer of one or more of these substances.
  • POM polyoxymethylene
  • PBT polybutylene terephthalate
  • PET polyethylene terephthalate
  • PSU polysulfone
  • PEI polyetherimide
  • PEEK polyetheretherketone
  • PEN polyethylene naphthalate
  • PBN polybutylene naphthalate
  • PTT polytrimethylene terephthalate
  • copolymer of one or more of these substances are characterized by a good processability with various molding processes such as deep drawing or injection molding and can be
  • the molding compound is a mixture or blend of one or more of the plastics mentioned, substances having a particularly advantageous property profile can be created.
  • nanofillers preferably sheet silicates, nanotubes or spherical nanoparticles.
  • the shell has a textured inner surface, and / or a structured outer surface.
  • the shell a specific variation of the wall thickness in order to compensate for any inhomogeneities or anisotropies caused by the production process (for example, welding of two shell halves).
  • Optimum properties of the table tennis ball when it reaches a jump height of 220 mm to 280 mm when hitting 305 mm height on a standard stone slab and on its surface at a pressure of 50 N on a surface of 20 mm diameter at the Ballober Structure one reversible deformation between 0.65 mm and 0.90 mm, with a standard deviation across different points of the surface of less than 0.20 mm.
  • a method for producing a table tennis ball according to the invention is characterized in that a plurality of shell parts are produced in a first step, which are joined together in a subsequent step.
  • the shells or shell parts can be produced by forming a blank, for example a flat body, for example by deep drawing. This process may possibly be carried out near or below the softening temperature, so that the material behavior is very easy to control.
  • the shells or shell parts by shaping from a liquid or pasty raw material by means of a primary molding process, for example by injection molding. In such a case can be exactly affect the cross section and thus ensure a consistent shell thickness.
  • the invention recommends that the shell parts are joined together by gluing, welding and / or clipping. While the former methods lead to a very stable table tennis ball, can be ensured with the latter method, a precisely defined cross-section of the ball at the joint. A sufficiently strong undercut ensures that the two shell halves can not be separated without destroying the ball.
  • the production costs can be further reduced by having the shell parts directly in the tool, preferably by means of assembly injection molding or hollow body injection molding.
  • thermoplastic material is particularly good moldable.
  • a ping-pong ball was made from two injection-molded PEI shells that had been given a plasma surface treatment with a polyvinyl butyral hot melt adhesive.
  • a ping-pong ball was made from two injection-molded PET half-shells, which have been given a plasma surface treatment with an epoxy-based reactive adhesive.
  • a ping-pong ball was made from two deep-drawn POM half shells, which after surface treatment are equipped with an epoxy-based reaction adhesive.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Prostheses (AREA)
EP06805719A 2005-09-15 2006-09-14 Zelluloidfreier tischtennisball Revoked EP1924331B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005044178A DE102005044178A1 (de) 2005-09-15 2005-09-15 Tischtennisball
PCT/EP2006/008963 WO2007031315A1 (de) 2005-09-15 2006-09-14 Zelluloidfreier tischtennisball

Publications (2)

Publication Number Publication Date
EP1924331A1 EP1924331A1 (de) 2008-05-28
EP1924331B1 true EP1924331B1 (de) 2012-04-25

Family

ID=37547080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805719A Revoked EP1924331B1 (de) 2005-09-15 2006-09-14 Zelluloidfreier tischtennisball

Country Status (8)

Country Link
US (1) US8105183B2 (ko)
EP (1) EP1924331B1 (ko)
JP (1) JP5078894B2 (ko)
KR (1) KR101331035B1 (ko)
CN (1) CN101272830B (ko)
AT (1) ATE554832T1 (ko)
DE (1) DE102005044178A1 (ko)
WO (1) WO2007031315A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015003699A1 (de) 2014-03-21 2015-09-24 Weener Plastik Gmbh Zelluloidfreier im Wesentlichen kugelförmiger Hohlkörper und dessen Fertigung

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005044178A1 (de) * 2005-09-15 2007-03-29 Thomas Dr. Wollheim Tischtennisball
CN101850170B (zh) 2009-03-31 2014-04-16 张辉伦 一种整体无缝结构的乒乓球
CN102838782B (zh) * 2012-09-06 2015-04-22 无锡市科恩塑胶有限公司 一种替代赛璐珞的乒乓球用材料及制造方法
CN102896788A (zh) * 2012-10-17 2013-01-30 丁杭峰 一种注塑成型的无赛璐珞乒乓球
CN103157255A (zh) * 2012-12-26 2013-06-19 缪国平 运动用球
CN105142741B (zh) * 2013-04-26 2016-08-17 日本卓球株式会社 乒乓球及乒乓球用热塑性树脂组合物
WO2015021138A1 (en) 2013-08-06 2015-02-12 Celanese International Corporation Cellulose acetate table tennis balls and processes for making
CN103394180B (zh) * 2013-08-12 2016-02-17 信阳农林学院 抗形变乒乓球制作方法
CA2942074C (en) * 2014-03-21 2020-04-07 Weener Plastik Gmbh Celluloid-free, substantially spherical hollow body and fabrication thereof
FR3039076B1 (fr) * 2015-07-22 2017-09-01 Decathlon Sa Balle de tennis de table et son procede de fabrication
CN105080081A (zh) * 2015-07-28 2015-11-25 上海红双喜股份有限公司 一种乒乓球二个半球连接结构和制造方法
CN105037990A (zh) * 2015-08-27 2015-11-11 浙江曙光体育用品有限公司 一种乒乓球用纳米无机填料改性聚苯乙烯及其制备方法
CN105111671B (zh) * 2015-09-28 2018-01-09 无锡市科恩塑胶有限公司 一种乒乓球及其制备方法
CN105694339B (zh) * 2016-03-14 2019-05-10 赵帅 一种制备乒乓球的方法、制备材料及乒乓球
KR102402639B1 (ko) 2017-11-24 2022-05-26 삼성전자주식회사 전자 장치 및 그의 통신 방법
CN108042990B (zh) * 2018-02-09 2022-12-13 华北理工大学 一种训练用乒乓球及其成型装置
CN109796760A (zh) * 2018-12-11 2019-05-24 盐城市艾斯特体育器材有限公司 一种环保的乒乓球
CN109568905A (zh) * 2018-12-11 2019-04-05 盐城市艾斯特体育器材有限公司 一种长寿命的乒乓球
CN109810449B (zh) * 2018-12-27 2021-08-17 聚石化学(苏州)有限公司 一种乒乓球用asa复合材料及其制备方法和应用
US11786792B2 (en) * 2022-02-26 2023-10-17 Play Everywhere Sports, Llc Table tennis apparatus and methods

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US2633894A (en) * 1948-04-21 1953-04-07 Raytheon Mfg Co Plastic welding
US3617589A (en) 1964-10-14 1971-11-02 James Jones Hinton Method for manufacturing table-tennis balls
GB1131322A (en) * 1964-10-14 1968-10-23 Dunlop Co Ltd Apparatus for forming hollow plastic articles
BE756475Q (fr) * 1964-10-14 1971-03-01 Dunlop Co Ltd Balles de tennis de table
GB1222901A (en) * 1968-07-04 1971-02-17 Dunlop Co Ltd Hollow plastic articles
JPS5017897A (ko) * 1973-05-30 1975-02-25
DE2611919A1 (de) * 1975-03-27 1976-10-14 Uop Inc Verfahren zur gegenstromkontaktbehandlung von gasen und fluessigkeiten und kontaktkoerper hierfuer
JPS5481936A (en) * 1977-12-10 1979-06-29 Dainippon Printing Co Ltd Table tennis ball
DE3438227A1 (de) * 1984-10-18 1986-04-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren zur herstellung von tischtennisbaellen
CN1057790A (zh) * 1990-06-26 1992-01-15 广州市文教体育用品工业公司 改性聚苯乙烯乒乓球
JP2002035189A (ja) 2000-07-26 2002-02-05 Haaguru:Kk 卓球用のボール及び卓球セット
CN1410250A (zh) * 2001-09-25 2003-04-16 骆益群 一种新型乒乓球和其制备方法
US20100210745A1 (en) * 2002-09-09 2010-08-19 Reactive Surfaces, Ltd. Molecular Healing of Polymeric Materials, Coatings, Plastics, Elastomers, Composites, Laminates, Adhesives, and Sealants by Active Enzymes
DE10315154A1 (de) * 2003-04-03 2004-10-14 Kuhn, Joachim, Dr. Tischtennisball mit Struktur- und Formelementen in der Schale
DE102005044178A1 (de) * 2005-09-15 2007-03-29 Thomas Dr. Wollheim Tischtennisball

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015003699A1 (de) 2014-03-21 2015-09-24 Weener Plastik Gmbh Zelluloidfreier im Wesentlichen kugelförmiger Hohlkörper und dessen Fertigung

Also Published As

Publication number Publication date
US8105183B2 (en) 2012-01-31
DE102005044178A1 (de) 2007-03-29
JP5078894B2 (ja) 2012-11-21
KR101331035B1 (ko) 2013-11-20
US20100009791A1 (en) 2010-01-14
KR20080044853A (ko) 2008-05-21
JP2009507589A (ja) 2009-02-26
EP1924331A1 (de) 2008-05-28
CN101272830B (zh) 2013-03-27
CN101272830A (zh) 2008-09-24
WO2007031315A1 (de) 2007-03-22
ATE554832T1 (de) 2012-05-15

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