KR102623642B1 - blade of table tennis racket - Google Patents

blade of table tennis racket Download PDF

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KR102623642B1
KR102623642B1 KR1020207007607A KR20207007607A KR102623642B1 KR 102623642 B1 KR102623642 B1 KR 102623642B1 KR 1020207007607 A KR1020207007607 A KR 1020207007607A KR 20207007607 A KR20207007607 A KR 20207007607A KR 102623642 B1 KR102623642 B1 KR 102623642B1
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plate
blade
table tennis
tennis racket
shaped body
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KR1020207007607A
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KR20200083436A (en
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아키히코 니와
준야 오카와
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가부시키가이샤 다마스
다이오 페이퍼 코퍼레이션
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    • 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
    • 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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • 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
    • B32B21/045—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 natural rubber or synthetic rubber
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/044—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic 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
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of 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
    • 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
    • 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
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

[과제]타구의 위력을 개선할 수 있은 신규한 기술을 제공한다.
[해결 수단]　셀룰로오스 나노 파이버를 포함하여 구성되는 판상체를 구비하는 탁구 라켓의 블레이드, 및 당해 블레이드를 구비하는 탁구 라켓.[Task] Provide new technology that can improve the power of batted balls.
[Solution] A table tennis racket blade including a plate-shaped body containing cellulose nanofibers, and a table tennis racket including the blade.

Description

탁구 라켓의 블레이드 blade of table tennis racket

본 발명은 탁구 라켓의 블레이드에 관한 것이다.The present invention relates to a blade of a table tennis racket.

탁구 라켓은 블레이드(탁구 라켓 본체)와, 해당 블레이드에 고정되고, 사용 시에 유저가 잡는 파지부를 구성하고 있는 그립부재와, 블레이드에 첩합되어 타구면(打球面)을 구성하는 탁구용 러버를 가지고 있다(예를 들면, 특허문헌 1).A table tennis racket includes a blade (table tennis racket body), a grip member that is fixed to the blade and constitutes a grip portion that the user grasps during use, and table tennis rubber that is bonded to the blade and constitutes a hitting surface. It has it (for example, patent document 1).

블레이드는 평판상의 형상을 가지고 있고, 하나의 판상체 또는 복수의 판상체를 첩합한 적층체에 의해 구성되어 있다.The blade has a flat shape and is made up of a single plate or a laminate of multiple plate shapes joined together.

탁구 라켓의 블레이드는 목재가 많이 사용되는 것이 현행의 룰(목재 비율：85% 이상)에서도 일반적인 반면, 목재가 아닌 재료를 사용하여 제조되는 블레이드도 제안되고 있다.While it is common for table tennis racket blades to be made of wood even under the current rules (wood ratio: 85% or more), blades manufactured using materials other than wood have also been proposed.

예를 들면, 블레이드에 대해서 보다 반발력을 높이기 위하여, 블레이드를 복수의 판상체를 포함하는 적층 구조로 하고, 그 중의 하나 또는 복수의 해당 판상체로서 탄소섬유를 일 방향으로 배열하여 수지로 굳힌 ULC(Uniaxial Light Carbon)로 형성한 섬유 강화 수지판을 이용하고 있는 블레이드가 알려져 있다.For example, in order to increase the repulsive force against the blade, the blade is made into a laminated structure including a plurality of plate-shaped bodies, and as one of the plate-shaped bodies, carbon fiber is arranged in one direction and hardened with resin (ULC) Blades using fiber-reinforced resin plates formed of Uniaxial Light Carbon are known.

또한, 보다 탄성율이 큰 탄소섬유를 이용하거나, 이종섬유를 종횡으로 직조하여 수지로 굳힘으로써 구성되어 있는 ZLF나 SP-ZLC로 형성한 섬유 강화 수지판을 이용하고 있는 블레이드도 알려져 있다.In addition, blades using carbon fiber with a higher modulus of elasticity or using fiber-reinforced resin plates made of ZLF or SP-ZLC, which are composed by weaving heterogeneous fibers vertically and horizontally and hardening them with resin, are also known.

게다가, 특허문헌 2에서는, 블레이드를 복수의 판상체를 포함하는 적층 구조로 하고, 해당 판상체에 플라스틱이나 금속을 이용하는 것이 제안되어 있다. 특허문헌 2에 기재된 블레이드에서도, 블레이드에 대하여 보다 반발력을 높이는 것을 의도하여 발명이 이루어져 있다.Furthermore, in Patent Document 2, it is proposed that the blade has a laminated structure including a plurality of plate-shaped bodies, and that plastic or metal is used for the plate-shaped bodies. Even in the blade described in Patent Document 2, the invention was made with the intention of increasing the repulsive force against the blade.

특허문헌 1: 일본 특허공개 2010-227371호 공보Patent Document 1: Japanese Patent Publication No. 2010-227371 특허문헌 2: 일본 특허공개 2000-342733호 공보Patent Document 2: Japanese Patent Publication No. 2000-342733

본 발명은, 타구의 위력을 개선할 수 있는 신규한 기술을 제공하는 것을 목적으로 한다.The purpose of the present invention is to provide a novel technology that can improve the power of a batted ball.

상품 설계의 자유도의 관점에서 보다 여러가지 방법에 의해 탁구 라켓의 블레이드를 개선할 수 있는 것이 바람직하고, 이를 위하여, 더욱 신규한 구성이 제안되는 것이 바람직하다고 말할 수 있다.From the viewpoint of freedom in product design, it is desirable to be able to improve the blade of a table tennis racket in a variety of ways, and for this purpose, it is desirable to propose a more novel configuration.

본 발명자는, 단지 블레이드의 반발력을 높여 스피드만을 개선할 뿐만 아니라, 타구의 위력을 개선하는 것으로 하고, 여기서 블레이드의 에너지 효율을 보다 높이는 것을 착상하였다.The present inventor had the idea of improving the energy efficiency of the blade by not only improving the speed by simply increasing the repulsion force of the blade, but also improving the power of the batted ball.

에너지 효율이란, 타구의 위력을 나타내는 값으로, 해당 값이 클수록 타구의 전후에서 볼의 에너지 손실이 작은 것을 의미한다.Energy efficiency is a value that represents the power of a batted ball. The larger the value, the smaller the energy loss of the ball before and after the hit.

에너지 손실이 작을 때, 타구 전의 볼의 스피드 에너지나 회전 에너지가 좋은 효율로 잘 전달되므로, 타구의 스피드가 빨라진다. 그 결과, 예를 들면, 빠른 드라이브나 스매쉬를 치기 쉬워진다.When energy loss is small, the speed energy or rotational energy of the ball before the hit is transmitted with good efficiency, so the speed of the hit becomes faster. As a result, it becomes easier to hit fast drives or smashes, for example.

또한, 에너지 손실이 작을 때, 타구 전의 볼의 스피드나 회전의 에너지가 좋은 효율로 잘 전달되므로, 스핀 성능도 향상된다. 그 결과, 예를 들면, 회전이 걸린 드라이브·컷·서비스가 치기 쉬워진다.Additionally, when the energy loss is small, the speed and rotational energy of the ball before the hit are transmitted with good efficiency, thereby improving spin performance. As a result, for example, drives, cuts, and services with spin become easier to hit.

본 발명자는 철저히 연구한 결과, 셀룰로오스 나노 파이버(CNF)를 이용하여 탁구 라켓의 블레이드를 구성함으로써, 블레이드의 에너지 효율을 높일 수 있다는 것을 발견하고, 본 발명을 완성시켰다. 한편, 본 명세서에서, 셀룰로오스 나노 파이버(CNF)란, 식물 원료인 펄프(펄프 섬유)를 해섬(解纖)하여 얻을 수 있는 미세한 셀룰로오스 섬유를 말하고, 일반적으로 섬유 폭이 나노 사이즈(1nm 이상 1000nm 이하)의 셀룰로오스 미세 섬유를 포함하는 셀룰로오스 섬유를 말한다.As a result of thorough research, the present inventor discovered that the energy efficiency of the table tennis racket blade could be increased by using cellulose nanofibers (CNF), and completed the present invention. Meanwhile, in this specification, cellulose nanofiber (CNF) refers to a fine cellulose fiber obtained by dissolving pulp (pulp fiber), which is a plant raw material, and generally has a fiber width of nano size (1nm to 1000nm). ) refers to cellulose fibers containing cellulose microfibers.

본 발명의 요지는 이하와 같다.The gist of the present invention is as follows.

[1] 셀룰로오스 나노 파이버를 함유하는 판상체를 구비하는 탁구 라켓의 블레이드.[1] A table tennis racket blade comprising a plate-shaped body containing cellulose nanofibers.

[2] 1 또는 2 이상의 셀룰로오스 나노 파이버를 함유하는 판상체를 포함하는 적층 구조를 가지는, [1]에 기재된 탁구 라켓의 블레이드.[2] The blade of the table tennis racket according to [1], which has a laminated structure including plate-shaped bodies containing one or two or more cellulose nanofibers.

[3] 셀룰로오스 나노 파이버를 함유하는 판상체에서, 셀룰로오스 나노 파이버는 상기 판상체 당 적어도 40질량% 함유되는, [1] 또는 [2]에 기재된 탁구 라켓의 블레이드.[3] The blade of the table tennis racket according to [1] or [2], wherein the plate-shaped body containing cellulose nanofibers contains at least 40% by mass of the cellulose nanofibers per plate-shaped body.

[4] [1] 내지 [3] 중 어느 하나에 기재된 탁구 라켓의 블레이드를 가지는 탁구 라켓.[4] A table tennis racket having the blade of the table tennis racket according to any one of [1] to [3].

본 발명에 의하면, 타구의 위력을 개선할 수 있는 신규한 기술을 제공할 수 있다.According to the present invention, it is possible to provide a new technology that can improve the power of a batted ball.

도 1은 본 실시형태에 관한 탁구 라켓의 사시도이다.
도 2는 도 1의 XX＇선에서의 단면을 나타내는 도이다.
도 3은 실시예의 각 블레이드와 에너지 효율과의 관계를 나타내는 그래프이다.1 is a perspective view of a table tennis racket according to this embodiment.
FIG. 2 is a diagram showing a cross section taken along line XX' in FIG. 1.
Figure 3 is a graph showing the relationship between each blade and energy efficiency in the embodiment.

이하, 본 발명의 하나의 실시형태를 상세하게 설명한다.Hereinafter, one embodiment of the present invention will be described in detail.

본 실시형태는, 셀룰로오스 나노 파이버(CNF)를 함유하는 판상체를 구비하는 탁구 라켓의 블레이드에 관한 것이다.This embodiment relates to a table tennis racket blade provided with a plate-shaped body containing cellulose nanofibers (CNF).

한편, 이하에서는, 본 실시형태의 블레이드를 구비하는 탁구 라켓으로서, 양면 타구용의 셰이크 핸드 타입 탁구 라켓(이하, 단지 탁구 라켓이라고도 한다)을 예로 들어 설명한다. 그렇지만, 본 발명의 블레이드는 셰이크 핸드 타입에 적용되는 것으로 한정되지 않고, 예를 들면 펜 홀더 타입의 블레이드여도 좋다.Meanwhile, hereinafter, as a table tennis racket provided with the blade of this embodiment, a shake hand type table tennis racket for double-sided hitting (hereinafter also simply referred to as a table tennis racket) will be described as an example. However, the blade of the present invention is not limited to being applied to the shake hand type, and may be, for example, a pen holder type blade.

도 1은, 본 실시형태에 관한 탁구 라켓(100)의 사시도이다. 또한, 도 2는 도 1의 XX＇선에 따른 단면도이다.Fig. 1 is a perspective view of a table tennis racket 100 according to this embodiment. Additionally, FIG. 2 is a cross-sectional view taken along line XX' in FIG. 1.

본 실시형태의 탁구 라켓(100)은, 양쪽의 면에 탁구 러버(20)가 첩합되는 평판상의 블레이드(라켓 본체)(10)와, 블레이드(10)에 고정되어 라켓 사용 시에 사용자에 의해 파지되는 파지부를 구성하는 그립부재(31, 33)를 구비한다.The table tennis racket 100 of this embodiment includes a flat blade (racquet body) 10 to which table tennis rubbers 20 are bonded to both sides, and a flat blade (racquet body) 10 that is fixed to the blade 10 and is held by the user when using the racket. It is provided with grip members (31, 33) constituting the gripping part.

그립부재는, 앞측의 면에 배치되는 그립부재(31)와 후측의 면에 배치되는 그립부재(33)의 2개의 부재에 의해서 구성되어 있고, 이들은 블레이드(10)을 끼워 넣는 것과 같은 형태로 고정되고 있다. 이들 그립부재(31, 33)의 형상이나 두께는 적절히 변경 가능하고, 특히 한정되지 않는다.The grip member is composed of two members, a grip member 31 disposed on the front surface and a grip member 33 disposed on the rear surface, and these are fixed in the same form as inserting the blade 10. It is becoming. The shape and thickness of these grip members 31 and 33 can be changed as appropriate and are not particularly limited.

상술한 바와 같이, 본 실시형태에서는, 블레이드의 표면(표면 및 이면)에 러버(20)가 접착제 등을 이용하여 붙여질 수 있다. 본 실시형태에서, 러버(20)의 형상, 조성 등에 대해서는 특히 한정되지 않고, 사용자의 기호 등에 따라 선택되는 러버를 적절히 이용할 수 있다.As described above, in this embodiment, the rubber 20 can be attached to the surface (front and back) of the blade using an adhesive or the like. In this embodiment, there is no particular limitation on the shape, composition, etc. of the rubber 20, and a rubber selected according to the user's preference, etc. can be appropriately used.

한편, 본 실시형태에서는, 셰이크 핸드 타입 탁구용 라켓으로서 스트레이트 타입의 파지부를 구비하는 탁구용 라켓을 나타내지만, 이에 한정되지 않고, 플레어 타입, 아나토믹 타입, 코닉 타입 등으로 해도 좋다.Meanwhile, in this embodiment, a table tennis racket having a straight type grip portion is shown as a shake hand type table tennis racket, but the racket is not limited to this and may be a flare type, anatomic type, conic type, etc.

다음으로, 본 실시형태의 블레이드(10)에 대하여 설명한다.Next, the blade 10 of this embodiment will be described.

본 실시형태의 블레이드(10)는, CNF를 함유하는 판상체를 이용하여 구성되어 있고, 구체적으로는 CNF를 함유하는 판상체를 포함하는 복수의 판상체로 구성되고 있는 적층 구조를 가지고 있다.The blade 10 of this embodiment is constructed using a plate-shaped body containing CNF, and specifically has a laminated structure comprised of a plurality of plate-shaped bodies including the plate-shaped body containing CNF.

도 2에 나타내는 바와 같이, 본 실시형태에서는 7개의 판상체를 적층하여 블레이드(10)를 구성하고 있다.As shown in FIG. 2, in this embodiment, the blade 10 is formed by stacking seven plate-shaped objects.

즉, 판상체(11)를 사이에 두도록 하여 2개의 판상체(15)가 배치되고, 더욱이 판상체(11, 15)로 구성되는 적층체를 사이에 두도록 하여 2개의 판상체(17)가 배치되어 있다. 더욱이, 또한, 판상체(11, 15, 및 17)로 구성되는 적층체를 사이에 두도록 하여 2개의 판상체(20)가 배치되어 있다. 각 판상체는 예를 들어 접착제에 의해 첩합된다. 또한, 판상체(20)의 판상체(17)와는, 면하고 있지 않은 측의 표면에서는 러버(20)가 예를 들면 접착제를 이용하여 첩합된다.That is, two plate-shaped bodies 15 are arranged with the plate-shaped bodies 11 in between, and two plate-shaped bodies 17 are further arranged with a laminate composed of the plate-shaped bodies 11 and 15 sandwiched between them. It is done. Furthermore, two plate-shaped bodies 20 are arranged with a laminated body composed of plate-shaped bodies 11, 15, and 17 sandwiched between them. Each platelet is joined together, for example by adhesive. Additionally, the rubber 20 is bonded to the surface of the plate-shaped body 20 on the side that is not facing the plate-shaped body 17 using, for example, an adhesive.

또한, 본 실시형태에서는, 판상체(17)가 CNF로 구성되어 있고, 다른 판상체는 목재로 구성되어 있다.Additionally, in this embodiment, the plate-shaped body 17 is made of CNF, and the other plate-shaped body is made of wood.

각 판상체의 두께 등은 특히 한정되지 않고, 당업자가 적절히 설정할 수 있다.The thickness of each plate-shaped body is not particularly limited and can be set appropriately by a person skilled in the art.

해당 CNF를 함유하는 판상체의 제조방법은 특히 한정되는 것은 아니지만, 이하의 방법에 의해 매우 적합하게 제조할 수 있다.The method for producing the plate-shaped body containing the CNF is not particularly limited, but can be suitably produced by the following method.

해당 CNF 성형체의 제조방법의 일례는, 우선, CNF를 물 등의 분산매 중에 분산시켜 슬러리를 형성한다. 한편, CNF는 펄프 등을 공지의 방법에 따라 처리하여 얻은 것을 이용할 수 있는 것 이외에, 시판의 것을 이용하도록 해도 좋고, 특히 한정되지 않는다.In an example of the method for producing the CNF molded body, first, CNF is dispersed in a dispersion medium such as water to form a slurry. On the other hand, the CNF may be one obtained by processing pulp or the like according to a known method, or a commercially available one may be used, and is not particularly limited.

다음으로, 얻어진 슬러리를 이용하여 가압 공정에 제공하여 판상체를 얻는다. 구체적으로는, 분산매를 포함하는 CNF를 가열하면서 두께 방향으로 가압하는 공정에 제공하여 판상체를 얻는다. 또한, 이러한 가압 공정의 전에, 예비 탈수 공정을 구비하는 것이 바람직하다. 예비 탈수 공정으로서는, 메쉬상의 부재를 개입하여 CNF를 포함하는 슬러리를 탈수하는 공정을 채용할 수 있다. 즉, CNF 슬러리를 예비 탈수 공정에 제공함하여 판상으로 성형하고, 이 성형체를 가압 공정에 제공하여 본 실시형태에 관한 CNF를 함유하는 판상체로 하는 것이 바람직하다. 해당 제조방법은, 이러한 공정 이외의 다른 공정을 더 갖추고 있어도 좋다.Next, the obtained slurry is subjected to a pressurization process to obtain a plate-shaped body. Specifically, CNF containing a dispersion medium is subjected to a process of pressing in the thickness direction while heating to obtain a plate-shaped body. Additionally, it is desirable to provide a preliminary dehydration process before this pressurization process. As a preliminary dewatering process, a process of dehydrating the slurry containing CNF via a mesh-like member can be adopted. That is, it is preferable to subject the CNF slurry to a preliminary dehydration process to form a plate shape, and then subject this molded body to a pressurization process to obtain a plate shape containing CNF according to the present embodiment. The manufacturing method may further include processes other than these processes.

한편, 본 발명의 목적을 달성할 수 있는 범위에서, CNF에 더하여 다른 재료를 배합하여 본 실시형태와 관한 CNF를 함유하는 판상체를 제조하도록 해도 좋다. 구체적으로는, 펄프 등을 들 수 있다. 본 명세서에서, 펄프란, 목재 그 외의 식물을 기계적으로 또는 화학적 처리에 의해 추출한 셀룰로오스 섬유의 집합체를 말한다.On the other hand, to the extent that the object of the present invention can be achieved, other materials may be mixed in addition to CNF to produce a plate-like body containing CNF according to the present embodiment. Specifically, pulp and the like can be mentioned. In this specification, pulp refers to an aggregate of cellulose fibers extracted from wood or other plants mechanically or through chemical treatment.

또한, 본 실시형태에 관한 CNF를 함유하는 판상체에서, CNF는, 당해 판상체 전체에 대하여, 40 ~ 100질량%가 바람직하고, 60 ~ 95 질량%가 보다 바람직하고, 70 ~ 90 질량%가 더욱 바람직하다. CNF의 함유량을 상기 하한의 40질량% 이상으로 함으로써, 범위 외에 있는 경우와 비교하여 단위 면적당의 수소결합점을 증가시켜 강도 등을 높일 수 있고, 단위 밀도당의 에너지 효율을 높일 수 있다.In addition, in the plate-shaped body containing CNF according to the present embodiment, the CNF is preferably 40 to 100% by mass, more preferably 60 to 95% by mass, and 70 to 90% by mass relative to the entire plate-shaped body. It is more desirable. By setting the CNF content to 40% by mass or more of the above lower limit, compared to the case outside the range, the hydrogen bonding points per unit area can be increased, the strength, etc. can be increased, and the energy efficiency per unit density can be increased.

또한, 본 실시형태에서, 블레이드(10)의 중량은 특히 한정되지 않고, 당업자가 적절히 설정할 수 있다.Additionally, in this embodiment, the weight of the blade 10 is not particularly limited and can be set appropriately by a person skilled in the art.

한편, 본 실시형태의 블레이드(10)을 이용하는 경우에는 중량 증가가 되는 것을 억제하여 에너지 효율을 높이는 것이 가능하다.On the other hand, when using the blade 10 of this embodiment, it is possible to suppress the increase in weight and increase energy efficiency.

탁구 라켓에 대해서는, 라켓을 휘두르는 것도 중요한데, 이를 위해서는, 상기 타구의 위력의 개선을 중량 증가로 연결하지 않는 방법으로 실시할 수 있는 것이 바람직하다.With a table tennis racket, swinging the racket is also important, and for this purpose, it is desirable to be able to improve the power of the batted ball in a way that does not lead to an increase in weight.

이 점, 기존의 기술로 에너지 효율을 높이기 위해서는, 블레이드를 복수의 판상체로 이루어지는 적층체로 함과 동시에 그 중 하나 또는 복수의 판상체를 섬유 강화 수지판으로 하고, 게다가 당해 섬유 강화 수지판의 밀도를 높이는 것을 우선 생각할 수 있다. 그렇지만, 이와 같이 섬유 강화 수지판의 밀도를 높이는 경우에는, 그 두께 등을 유지 한 채로는 중량 증가는 피할 수 없다.In this regard, in order to increase energy efficiency with existing technology, the blade is made into a laminate made of a plurality of plate-shaped bodies, and one or more of the plate-shaped bodies is made into a fiber-reinforced resin plate, and in addition, the density of the fiber-reinforced resin plate You can first consider increasing . However, when increasing the density of the fiber-reinforced resin plate in this way, an increase in weight cannot be avoided while maintaining the thickness, etc.

이에 대하여, 본 실시형태의 블레이드(10)와 같이 CNF를 이용하여 판상체를 구성하는 경우에는 단위 밀도당의 에너지 효율 향상이 보다 높기 때문에, 중량 증가로 되는 것을 억제하여 에너지 효율을 높일 수 있다.In contrast, when a plate-shaped body is formed using CNF, such as the blade 10 of this embodiment, the improvement in energy efficiency per unit density is higher, so the increase in weight can be suppressed and energy efficiency can be increased.

이상, 본 실시형태에 의하면, CNF를 이용하여 블레이드를 구성함으로써, 에너지 효율이 보다 높은 탁구 라켓의 블레이드를 얻을 수 있다. 그 결과, 개인의 기량이나 첩합되는 러버의 성능 등에 의해 차이는 있지만, 타구의 위력에 대하여 개선된 탁구 라켓을 제공할 수 있다.As mentioned above, according to this embodiment, by configuring the blade using CNF, a table tennis racket blade with higher energy efficiency can be obtained. As a result, although there are differences depending on the individual's skill and the performance of the rubber to be bonded, it is possible to provide a table tennis racket with improved power of the hit.

한편, 본 발명은 여기서 설명한 실시형태로 한정되지 않고, 다른 태양으로 하는 것도 물론 가능하다. 예를 들면, 블레이드를 적층 구조로 한 경우에 CNF를 이용하여 구성되어 있는 판상체의 수나 배치에 대해서, 도 2에서 예시한 것 이외로 할 수 있다. 예를 들면, 적층체를 구성하는 판상체의 수를 변경하거나 해도 좋고 이외, 러버와 접하는 판상체를 CNF를 이용하여 구성하는 등으로 해도 좋다. 또한, 블레이드 자체도 적층 구조를 가지는 것에 한정하지 않고, 예를 들면 하나의 판상체에 의해 블레이드를 구성하고, 당해 판상체를 CNF를 이용하여 구성하도록 해도 좋다.Meanwhile, the present invention is not limited to the embodiment described here, and other aspects are of course possible. For example, when the blade has a laminated structure, the number and arrangement of the plate-shaped bodies made of CNF can be different from those illustrated in FIG. 2. For example, the number of plate-shaped bodies constituting the laminate may be changed, or alternatively, the plate-shaped body in contact with the rubber may be formed using CNF. In addition, the blade itself is not limited to having a laminated structure. For example, the blade may be constructed from a single plate-shaped body, and the plate-shaped body may be constructed using CNF.

한편, 블레이드에 대하여 CNF를 함유하는 판상체를 포함하는 적층 구조(특히, CNF를 함유하는 판상체와 CNF를 비함유하는 판상체를 포함하는 적층 구조)를 가지도록 구성하는 것이 블레이드 두께나 블레이드 중량의 점에서 바람직하다.On the other hand, configuring the blade to have a laminated structure including a plate-like body containing CNF (in particular, a laminated structure including a plate-like body containing CNF and a plate-like body not containing CNF) is important for the blade thickness and blade weight. It is desirable in that respect.

또한, 단위 밀도당의 에너지 효율을 보다 높일 수 있는 관점에서, 상기와 같이 블레이드를 CNF를 함유하는 판상체와 CNF를 비함유하는 판상체를 포함하는 적층 구조를 가지고 있도록 구성하는 경우에, CNF를 함유하는 판상체의 당해 적층체 구조 전체에 차지하는 비율은 두께방향(적층방향)에 있어서의 길이로 40% 이하인 것이 보다 바람직하고, 더욱이 또한, CNF를 함유하는 판상체는 탁구용 러버와는 비접촉이고, 한편 CNF를 함유하는 판상체의 두께는 0.25mm 이상 0.40mm 이하(더욱 보다 한층 바람직하게는 0.30mm 이상 0.37mm 이하)인 것이 보다 한층 바람직하다.In addition, from the viewpoint of further increasing energy efficiency per unit density, when the blade is configured as described above to have a laminated structure including a plate-shaped body containing CNF and a plate-shaped body not containing CNF, the blade containing CNF It is more preferable that the proportion of the plate-shaped body to the entire laminate structure is 40% or less in terms of the length in the thickness direction (lamination direction), and furthermore, the plate-shaped body containing CNF is not in contact with the table tennis rubber, On the other hand, it is more preferable that the thickness of the plate-shaped body containing CNF is 0.25 mm or more and 0.40 mm or less (even more preferably 0.30 mm or more and 0.37 mm or less).

실시예　Example

이하의 실시예에 의해 본 발명을 더욱 구체적으로 설명하는데, 본 발명은 이들로 한정되지 않는다.The present invention is explained in more detail by the following examples, but the present invention is not limited to these.

［실시예의 블레이드의 제조］[Manufacture of blade of embodiment]

광엽수쇄(廣葉樹) 크라프트 펄프를 기계적으로 처리하여 제조한 CNF와 광엽수쇄 크라프트 펄프를 고형분 중량 비율로 8：2가 되도록 수중에서 혼합하였다. 얻어진 혼합물을 원료로 하여, 금속제의 형틀을 이용하고, 두께 방향으로 예비 하중을 주어 착수한 후, 가열하면서 두께 방향으로 가압하여 건조하고, 두께 0.32mm의 CNF를 함유하는 판상체를 얻었다.CNF prepared by mechanically treating shredded broadleaf kraft pulp and shredded broadleaf kraft pulp were mixed in water at a solids weight ratio of 8:2. Using the obtained mixture as a raw material, a metal mold was used, and a preliminary load was applied in the thickness direction to prepare the mixture. Then, it was dried by pressing in the thickness direction while heating, and a plate-like body containing CNF with a thickness of 0.32 mm was obtained.

또한, 마찬가지의 방법으로 두께 0.35mm의 CNF를 함유하는 판상체를 얻었다.Additionally, a plate-shaped body containing CNF with a thickness of 0.35 mm was obtained in the same manner.

이상과 같이 하여 얻어진 CNF를 함유하는 판상체와 목재(밀도： 0.35 ~ 0. 54g/cm3의 아프리카재, 및 밀도 0.30 ~ 0.35g/cm3의 아시아재)에 의해 구성되는 판상체를 우레탄 수지를 이용하여 첩합하여, 실시예에 관한 탁구 라켓의 블레이드를 얻었다. 구체적으로는, 표 1에 나타내는 바와 같이, 중판으로 칭하는 판상체에, 두께 방향으로 첨심(1), 첨심(2) 또는 상판으로 칭하는 판상체를 순서대로 적층하여 중판을 중심으로 하는 7층의 적층체로 하여 구성하였다. CNF를 함유하는 판상체는 에너지 효율에 강하게 영향을 주는 것으로 확인되는 상판, 첨심(1) 및 첨심(2)에 이용하였다.The plate-shaped body composed of the plate-shaped body containing CNF obtained as above and wood (density: 0.35 to 0.54 g/cm 3 African wood, and density: 0.30 to 0.35 g/cm 3 Asian wood) was mixed with urethane resin. was bonded using to obtain the blade of the table tennis racket according to the example. Specifically, as shown in Table 1, a plate-shaped body called the middle plate is laminated in order in the thickness direction, and a plate-shaped body called the core (1), the core (2), or the top plate is laminated with the middle plate as the center. It was composed using a sieve. Platelets containing CNF were used for the top plate, core (1), and core (2), which were found to have a strong effect on energy efficiency.

또한, 비교예로서, 상술의 ULC(카본 섬유(메이커： Toray Medical Company Limited 품명：토레카)를 일 방향으로 배열시켜 에폭시 수지로 굳힌 것), ZLF(PBO 섬유(메이커： TOYOBO STC CO., LTD. 품명：Zylon)를 종횡으로 직조하여 에폭시 수지로 굳힌 것) 또는 SP-ZLC(상기 PBO 섬유를 종사, 상기 카본 섬유를 횡사로 하여 종횡으로 직조하여 에폭시 수지로 굳힌 것)인 판상체를 이용하여, 비교예의 탁구용 블레이드를 구성하였다.In addition, as a comparative example, the above-mentioned ULC (carbon fiber (manufacturer: Toray Medical Company Limited product name: Toreca) arranged in one direction and hardened with epoxy resin), ZLF (PBO fiber (manufacturer: TOYOBO STC CO., LTD) Product name: Zylon) is woven vertically and horizontally and hardened with epoxy resin) or SP-ZLC (the PBO fiber is woven vertically and the carbon fiber is wefted and the carbon fiber is woven vertically and horizontally and hardened with epoxy resin). , the table tennis blade of the comparative example was constructed.

［표 1］［Table 1］

Figure 112020027171970-pct00001
Figure 112020027171970-pct00001

［에너지 효율의 측정］［Measurement of energy efficiency］

실시예 또는 비교예의 블레이드에 두께 3.88mm의 8cm×8cm 각(角)의 러버를 접착제(메이커: BUTTERFLY 품명：프리책II)로 양면을 첩합하여, 탁구 라켓을 구성하였다.A table tennis racket was constructed by bonding both sides of an 8 cm x 8 cm square rubber with a thickness of 3.88 mm to the blade of the example or comparative example with an adhesive (manufacturer: BUTTERFLY product name: Freechak II).

라켓의 타구면이 45도의 경사를 가지도록 기울여, 라켓의 모양 부분을 고정기구로 고정하였다.The hitting surface of the racket was tilted to have an inclination of 45 degrees, and the shaped part of the racket was fixed with a fixing device.

이어, 탁구용 머신을 이용하여, 러버로 향해 탁구용 볼(메이커： BUTTERFLY 품명： 쓰리 스타볼 G40＋)을 발사하였다. 이 때, 볼의 속도는 7.5m/s, 회전수는 61rps로 설정하였다. 그리고, 볼이 러버에 닿기 직전부터 직후(구체적으로는, 충돌 전후 10ms)까지, 카메라(메이커: nac Image Technology Inc. 품명：MEMRECAM　fx　K4)로 촬영하였다.Next, using a table tennis machine, a table tennis ball (manufacturer: BUTTERFLY product name: Three Star Ball G40+) was fired toward the rubber. At this time, the ball speed was set to 7.5 m/s and the rotation speed was set to 61 rps. Then, images were taken with a camera (manufacturer: nac Image Technology Inc. product name: MEMRECAM fx K4) from just before the ball touched the rubber to immediately after (specifically, 10 ms before and after the collision).

촬영한 영상을 해석 소프트(메이커： nac Image Technology Inc. 소프트：LAA 계측)를 이용하여, 러버에 닿기 직전 직후의 볼의 속도와 회전수를 계산하였다. 게다가, 얻어진 직전 직후의 볼의 속도와 회전수로부터, 실시예, 비교예 마다 단위 밀도당의 에너지 효율을 계산하였다.Using the captured video analysis software (manufacturer: nac Image Technology Inc. software: LAA Measurement), the speed and number of rotations of the ball just before and after hitting the rubber were calculated. In addition, the energy efficiency per unit density was calculated for each Example and Comparative Example from the speed and rotation speed of the ball just before and after the obtained results.

한편, 에너지 효율은, 이하의 식에 기초하여 산출된다.Meanwhile, energy efficiency is calculated based on the following equation.

Figure 112020027171970-pct00002
Figure 112020027171970-pct00002

결과를 도 3에 나타낸다. 한편, 도 3에서는, 각 실시예 및 비교예에 대하여 3회의 촬영 결과로부터 각각 단위 밀도당 에너지 효율의 평균을 산출하여, 비교예 3을 기준으로 하여 그 차를 나타내고 있다.The results are shown in Figure 3. Meanwhile, in Figure 3, the average energy efficiency per unit density is calculated from the three shooting results for each Example and Comparative Example, and the difference is shown based on Comparative Example 3.

도 3으로부터 이해할 수 있는 것처럼, 실시예의 블레이드를 이용하여 구성된 탁구 라켓에서는, 단위 밀도당의 에너지 효율이 크게 높아지고 있는 것을 이해할 수 있다.As can be understood from FIG. 3, in the table tennis racket constructed using the blade of the embodiment, the energy efficiency per unit density is greatly increased.

10　블레이드　
11, 15, 17 판상체　
20　러버　
31, 33 그립부재　
100　탁구 라켓　10 blade
11, 15, 17 platelets
20 rubber
31, 33 grip member
100 table tennis rackets

Claims (4)

셀룰로오스 나노 파이버를 함유하는 판상체와 셀룰로오스 나노 파이버를 비함유하는 판상체를 포함하는 적층 구조를 가지고,
상기 셀룰로오스 나노 파이버를 함유하는 판상체의 적층체 구조 전체에 차지하는 비율이 적층방향에 있어서의 길이로 40% 이하이며,
상기 셀룰로오스 나노 파이버를 함유하는 판상체에서, 셀룰로오스 나노 파이버가 상기 판상체 당 적어도 40질량% 함유되는 탁구 라켓의 블레이드.It has a laminated structure including a plate-shaped body containing cellulose nanofibers and a plate-shaped body not containing cellulose nanofibers,
The proportion of the entire laminate structure of the plate-shaped body containing the cellulose nanofibers is 40% or less in terms of the length in the stacking direction,
A blade for a table tennis racket, wherein, in the plate-shaped body containing the cellulose nanofibers, the cellulose nanofibers are contained at least 40% by mass per plate-shaped body. 제1항에 있어서,
2 이상의 상기 셀룰로오스 나노 파이버를 함유하는 판상체를 포함하는 적층 구조를 가지는, 탁구 라켓의 블레이드.According to paragraph 1,
A table tennis racket blade having a laminated structure including plate-shaped bodies containing two or more of the above cellulose nanofibers. 제1항 또는 제2항에 기재된 탁구 라켓의 블레이드를 구비하는 탁구 라켓.A table tennis racket having the blade of the table tennis racket according to claim 1 or 2. 삭제delete
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