JP4051241B2 - Blade body and table tennis racket - Google Patents

Description

表１のデータに示すとおり、第１の合板の曲げ弾性率（７４．４(N／ｍｍ²)）は、第２の合板の曲げ弾性率(７７．５(N／ｍｍ²))より３．１(Ｎ／ｍｍ²)だけ高い。
【００２９】
したがって、ポリパラフェニレンベンズビスオキサゾールが混合された接着液を使用することにより、打球に対する反発力を高めた卓球ラケットを提供することができる。
【００３０】
【発明の効果】
以上説明したように、本発明によれば、卓球ラケットのブレードを構成する各板材は短繊維入りの接着液により接着されるため、卓球ラケットの曲弾性率を高めることができる。したがって、打球に対する反発力を高めた卓球ラケットを提供することができる。
【００３１】
また、短繊維は、プリプレグ平面シートより軽いため、卓球ラケットが軽量化され、プレーヤにかかる負荷を最小限に抑えた卓球ラケットを提供することができる。
【００３２】
更に、プリプレグ平面シートを製造する必要がないため、製造方法が簡素化されるとともに低価格の卓球ラケットを提供することができる。
【図面の簡単な説明】
【図１】本実施形態の卓球ラケットの概略図。
【図２】ブレード本体の横断面を示した図。
【図３】本実施形態で使用される接着液の概略図。
【符号の説明】
１１ ブレード本体
１２ ラケットシート
１３ グリップ部材
２２ 接着材
１１１ 薄板
２２０ 接着液
２２１ 短繊維[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blade body and a table tennis racket.
[0002]
[Prior art]
As performance required for the table tennis racket, first, it is necessary to reduce the physical burden on the player and improve the racket speed by reducing the weight, that is, the weight.
[0003]
Secondly, it is necessary to increase the rebound force against the hit ball by increasing the flexural modulus, that is, increase the flexural modulus, and improve the hit ball speed.
[0004]
In order to improve these various performances, various studies have been conducted in the industry. For example, a table tennis racket using a blade body in which a plurality of thin plates are bonded with an adhesive for wood (hereinafter sometimes referred to as a “first table tennis racket”), aramid fibers, carbon fibers, etc. between a plurality of thin plates A table tennis racket using a prepreg flat sheet obtained by curing a fabric made of long fibers with a thermosetting resin such as an epoxy resin, and a blade body sandwiched between them (hereinafter sometimes referred to as `` second table tennis racket '') is proposed Has been.
[0005]
[Problems to be solved by the invention]
However, the first table tennis racket has a problem that it has a low elastic modulus and cannot repel a strong hitting ball because it simply bonds a plurality of plate materials with an adhesive for wood.
[0006]
In addition, the second table tennis racket has a problem that the weight of the prepreg plane sheet is a load and the racket speed is lowered, and the physical strength burden of the player is increased.
[0007]
Furthermore, since long fibers are difficult to handle because they are bent or entangled with each other, it is necessary to cure them with a thermosetting resin or the like. For this reason, problems have been pointed out such as an increase in cost due to the use of a thermoplastic resin and an increase in manufacturing time due to the step of curing the long fibers with a thermosetting resin.
[0008]
In view of these problems, as a result of intensive research, we found a table tennis racket blade body capable of hitting a ping-pong ball at high speed and a table tennis racket blade body which can be manufactured easily and at low cost, and completed the present invention. It was.
[0009]
An object of the present invention is to provide a table tennis racket blade body capable of hitting a ping-pong ball at high speed and a table tennis racket blade body which can be manufactured easily and at low cost.
[0010]
[Means for Solving the Problems]
The present invention relates to a table tennis racket blade body constructed by laminating a plurality of substrates, wherein two adjacent substrates among the plurality of substrates include short fibers made of polyparaphenylene benzbisoxazole. It is characterized by being adhered with.
[0014]
The blade body of the present invention is used for a table tennis racket.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a table tennis racket according to an embodiment of the present invention.
[0016]
In the figure, 11 is a blade body, 12 is a racket sheet attached to the plane of the blade body 11 so as to avoid overlap with the grip member 13, and 13 is attached to the rear end of the blade body 11 to constitute a grip. It is a grip member.
[0017]
FIG. 2 shows a cross section of the blade body 11. As shown in the figure, the blade body 11 is constituted by laminating five thin plates 111. Adhesive material 22 is applied between the thin plates 111, thereby bonding the thin plates 111. Note that the number of the thin plates 111 is five in the present embodiment, but is not limited to this, and can be changed as needed.
[0018]
FIG. 3 shows a schematic diagram of the adhesive 22. In the figure, reference numeral 220 denotes an adhesive liquid, and 221 denotes short fibers mixed in the adhesive liquid 220. As the adhesive 220, a urea resin for wood can be used, but any adhesive can be used as long as each thin plate 111 can be bonded and is lighter than a prepreg plane sheet. Also good.
[0019]
Short fibers 221 has a needle-like shape, made of Po Li paraphenylene benzobisoxazole.
[0020]
The length of the short fiber is preferably less than 3.0 mm, particularly preferably 1.0 mm or less.
[0021]
As described above, in the present embodiment, the short elastic fiber 221 is sandwiched between the thin plates 111 constituting the blade main body 11 so that the curvature elastic modulus of the blade main body 11 is compared with the conventional example as will be described in Examples described later. Can increase the hitting speed.
[0022]
Further, the short fiber 221 and the prepreg flat sheet used in the second table tennis racket have a lighter weight than the short fiber 221, so that the racket speed is improved and the load on the player is reduced.
[0023]
Furthermore, the blade body 11 of the present embodiment can be manufactured by simply stacking the thin plate 111 on which the adhesive 22 containing the short fibers 221 is applied to the adhesive surface. Therefore, unlike the second table tennis racket, it is not necessary to manufacture a prepreg flat sheet, and therefore, it is possible to provide a table tennis racket with a simplified manufacturing method and a low bending elastic modulus.
[0024]
Although FIG. 1 shows a shake-hand type table tennis racket, it goes without saying that the blade body 11 used in this embodiment can also be applied to a pen-type table tennis racket.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the blade body of the table tennis racket of the present invention will be described in more detail with reference to examples.
[0026]
However, the blade body of the table tennis racket of the present invention is not limited to the following examples.
[0027]
Table 1 shows a plywood bonded with a urea resin adhesive for wood (hereinafter also referred to as “first plywood”), and an adhesive obtained by mixing short fibers with the urea resin adhesive for wood. The data comparing the elastic modulus of elasticity with the plywood bonded together (hereinafter sometimes referred to as “second plywood”) is shown. The first plywood and the second plywood are both configured by stacking five plate materials. The short fiber used for the second plywood is polyparaphenylene benzbisoxazole, the length of the fiber is 1 mm, and the shape is needle-like.
[0028]
[Table 1]

As shown in the data of Table 1, the bending elastic modulus (74.4 (N / mm ² )) of the first plywood is 3 from the bending elastic modulus (77.5 (N / mm ² )) of the second plywood. .1 (N / mm ² ) higher.
[0029]
Therefore, the table tennis racket which improved the repulsive force with respect to a hit ball can be provided by using the adhesive liquid with which polyparaphenylene benzbisoxazole was mixed.
[0030]
【The invention's effect】
As described above, according to the present invention, each plate material constituting the blade of the table tennis racket is bonded by the adhesive liquid containing short fibers, so that the flexural modulus of the table tennis racket can be increased. Therefore, it is possible to provide a table tennis racket with improved repulsive force against the hit ball.
[0031]
Moreover, since the short fiber is lighter than the prepreg plane sheet, the table tennis racket is reduced in weight, and the table tennis racket with a minimal load on the player can be provided.
[0032]
Furthermore, since it is not necessary to manufacture a prepreg flat sheet, the manufacturing method is simplified and a low-priced table tennis racket can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic view of a table tennis racket according to an embodiment.
FIG. 2 is a diagram showing a cross section of a blade body.
FIG. 3 is a schematic view of an adhesive liquid used in the present embodiment.
[Explanation of symbols]
11 Blade body 12 Racket sheet 13 Grip member 22 Adhesive material 111 Thin plate 220 Adhesive liquid 221 Short fiber

Claims (3)

A table tennis racket blade body configured by laminating a plurality of substrates,
2. A table tennis racket blade body, wherein two adjacent substrates among the plurality of substrates are bonded together with an adhesive containing short fibers made of polyparaphenylene benzbisoxazole . The length of the said short fiber is less than 3.0 mm, The blade main body of the table tennis racket of Claim 1 characterized by the above-mentioned. A table tennis racket comprising the blade body of the table tennis racket according to claim 1 .

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