JP2006087462A - Bonding structure between skin side and ball side of ball for ball game - Google Patents

Bonding structure between skin side and ball side of ball for ball game Download PDF

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JP2006087462A
JP2006087462A JP2004273016A JP2004273016A JP2006087462A JP 2006087462 A JP2006087462 A JP 2006087462A JP 2004273016 A JP2004273016 A JP 2004273016A JP 2004273016 A JP2004273016 A JP 2004273016A JP 2006087462 A JP2006087462 A JP 2006087462A
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ball
layer
curable resin
catalyst
curing agent
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JP4656898B2 (en
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Zenjiro Shiozu
善治郎 潮津
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bonding structure between the skin side and the ball side of a ball for a ball game for the safe and easy manufacturing work by separately forming a solid resin layer on either skin side or ball side of the ball and forming a curing agent layer on the other side as a catalyst. <P>SOLUTION: The ball for the ball game is characterized by a cured resin layer 1 made of cured resin and formed on the rear surface of a skin material A on the skin side, the curing agent layer 2 made of a catalyst or the curing agent including the catalyst and formed on the front surface of a hollow spherical tube B on the ball side, and a protection film 3 for preventing deterioration applied to the curing agent layer to form a protection film layer. This invention consists of the bonding structure between the skin side and the ball side in the ball for the ball game. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、球技用ボールにおける外皮側とボール側との接着構造に関する。   The present invention relates to an adhesion structure between an outer skin side and a ball side in a ball for ball games.

従来、球技用ボールは、外皮側には、ゴム製、合成樹脂製の分割形状の表皮材ピースと、ボール側には、中空球状チューブ（カーカスという）を設けており、複数枚の各表皮材ピースをこの中空球状チューブの全面に、水溶性または溶剤性の接着剤を介して接着して、ボールを完成させている。   Conventionally, a ball for ball games has been provided with a rubber and synthetic resin split skin piece on the outer skin side and a hollow spherical tube (called carcass) on the ball side. A piece is bonded to the entire surface of the hollow spherical tube via a water-soluble or solvent-based adhesive to complete a ball.

そして、このボール製造には、その都度、外皮側ピース、カーカスに接着剤を塗布する作業を行っており、一個のボールに対して、数十枚の外皮側ピースに一々接着剤を塗布するものであり、その塗布作業が極めて煩雑であり、また、それら多数のボールを乾燥させる場所や設備を揃えたりするとなると広い場所が必要があった。（例えば、特許文献１のように）   Each time this ball is manufactured, the adhesive is applied to the outer skin piece and the carcass, and the adhesive is applied to several tens of outer skin pieces for each ball. In addition, the application work is extremely complicated, and a large space is required to prepare a place and equipment for drying these many balls. (For example, as in Patent Document 1)

また、特に、水溶性の接着剤を用いる場合には、外皮側とボール側との間や、特に、外皮側とその外部を被覆する表皮膜との間に少しでも水分が残ると、この残存水滴の箇所が外部から汚れて見えたり、また、残存水滴の箇所にカビが発生したりして、商品としての見栄えが悪くなるという欠点があり、また、その箇所に接着不良が生じ、商品として不良品となる等の欠点があった。   In particular, when a water-soluble adhesive is used, if any moisture remains between the outer skin side and the ball side, particularly between the outer skin side and the outer surface coating covering the outer surface, this residual There is a defect that the location of the water droplets looks dirty from the outside, or mold occurs in the location of the remaining water droplets, and the appearance as a product deteriorates. There were defects such as defective products.

そして、接着剤として、固形型樹脂接着剤を使用して、触媒としての硬化剤を使用するにしても、長い間放置しておくと、製造時には固形型樹脂接着剤が劣化しており、接着能力が落ちてしまい、製造作業がうまくいかないという欠点がある。
特願２００１−３２９８２７ Even if a solid resin adhesive is used as an adhesive and a curing agent as a catalyst is used, if left standing for a long time, the solid resin adhesive is deteriorated at the time of manufacture. There is a drawback that the production performance is not good because the capacity is reduced.
Japanese Patent Application No. 2001-329827

そこで、この発明は、ボールの外皮側とボール側との接着に必要な部材を、あらかじめ、ボールの外皮側とボール側の一方、または、両方に分散して備えるか、あるいは、ボールの外皮側とボール側の、いずれか一方にのみ備えることによって、球技用ボールの製造工程における接着作業の簡素化が図れる、球技用ボールにおける外皮側とボール側との接着構造を開発・提供するものである。   In view of this, the present invention provides a member necessary for adhesion between the outer side of the ball and the side of the ball, distributed in advance on one or both of the outer side and the side of the ball, or the outer side of the ball Development of the adhesion structure between the outer side and the ball side of a ball for ball, which can simplify the bonding work in the ball game manufacturing process. .

この発明による球技用ボールにおける外皮側とボール側との接着構造は、球技用ボールにおいて、外皮側の表皮材の裏面に、硬化型樹脂を塗布して硬化型樹脂層を形成し、ボール側の中空球状チューブの表面には、触媒または触媒を含む硬化剤を用いて硬化剤層を形成し、該硬化剤層に、劣化防止用の保護膜を塗布し、保護膜層を設けたことを特徴し、また、球技用ボールにおいて、外皮側の表皮材の裏面に、触媒または触媒を含む硬化剤を用いて硬化剤層を形成し、該硬化剤層に、劣化防止用の保護膜を塗布し、保護膜層を設け、ボール側の中空球状チューブの表面には、硬化型樹脂を塗布して硬化型樹脂層を形成したことを特徴し、さらに、球技用ボールにおいて、外皮側の表皮材の裏面か、あるいは、ボール側の中空球状チューブの表面のうち、一方にのみ、硬化型樹脂を用いて硬化型樹脂層を形成し、該硬化型樹脂層には必要に応じてミクロンタイプの塗膜剤で塗膜剤層を形成し、さらに、該塗膜剤層に触媒または、触媒を含む硬化剤を用いて硬化剤層を形成し、該硬化剤層に、必要に応じて保護膜材を設け、他方には、何も設けないことを特徴とする球技用ボールにおける外皮側とボール側との接着構造である。   The adhesion structure between the outer skin side and the ball side in the ball game ball according to the present invention is such that, in the ball game ball, a curable resin is applied to the back surface of the outer skin material to form a curable resin layer. The surface of the hollow spherical tube is formed with a curing agent layer using a catalyst or a curing agent containing a catalyst, a protective film for preventing deterioration is applied to the curing agent layer, and a protective film layer is provided. Further, in a ball for ball games, a curing agent layer is formed on the back surface of the outer skin material using a catalyst or a curing agent containing a catalyst, and a protective film for preventing deterioration is applied to the curing agent layer. In addition, a protective film layer is provided, and a curable resin layer is formed by applying a curable resin to the surface of the hollow spherical tube on the ball side. Front or back of the hollow spherical tube on the ball side Among them, a curable resin layer is formed using a curable resin only on one side, and a coating agent layer is formed with a micron-type coating agent on the curable resin layer as necessary. A curing agent layer is formed on the coating agent layer using a catalyst or a curing agent containing a catalyst, and a protective film material is provided on the curing agent layer as necessary, and nothing is provided on the other side. This is a bonding structure between the outer skin side and the ball side of the ball game ball.

この発明によると、球技用ボールの製造にあたり、外皮側の表皮材（Ａ）と、ボール側の中空球状チューブ（Ｂ）において、あらかじめ、これらの一方に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、他方に、触媒または触媒を含む硬化剤を塗布して硬化剤層（２）を形成したものを用いるため、作業工程を簡素化でき、コスト低減が図れる。
また、溶剤を使用しないため、作業員の健康上および身体の安全が図れ、さらに、製品の均一性が確保できる等の効果を奏する。 According to the present invention, in manufacturing a ball for ball games, the outer skin side skin material (A) and the ball side hollow spherical tube (B) are preliminarily made of one of these by using a curable resin on one of them. Since (1) is formed, and on the other side, a catalyst or a curing agent containing a catalyst is applied to form a curing agent layer (2), the work process can be simplified and the cost can be reduced.
In addition, since no solvent is used, the health and safety of workers can be ensured, and the product uniformity can be ensured.

そして、この発明によると、球技用ボールの製造にあたり、外皮側の表皮材（Ａ）と、ボール側の中空球状チューブ（Ｂ）において、これらの表皮材（Ａ）の裏面、あるいは、中空球状チューブ（Ｂ）の表面のうち、あらかじめ、一方にのみ、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、その上に、必要に応じてミクロンタイプの塗膜剤で塗膜剤層（４）を介して、触媒または触媒を含む硬化剤を塗布して硬化剤層（２）を形成したものを用いるため、簡単に接着作業を行うことができる。   According to the present invention, in the production of ball for ball games, in the skin material (A) on the skin side and the hollow spherical tube (B) on the ball side, the back surface of these skin materials (A) or the hollow spherical tube A curable resin layer (1) is formed on only one of the surfaces of (B) in advance using a curable resin, and a coating agent layer is formed thereon with a micron-type coating agent as necessary. Since (4) is used, the adhesive or the curing agent containing the catalyst is applied to form the curing agent layer (2), so that the bonding operation can be easily performed.

さらに、硬化剤層（２）には、それぞれ劣化防止用の保護膜（３）で被覆することにより、硬化剤（２）が劣化することを防止することができる等の極めて有益なる効果を奏する。   Furthermore, the curing agent layer (2) is coated with a protective film (3) for preventing deterioration, thereby providing extremely beneficial effects such as preventing the curing agent (2) from deteriorating. .

以下、この発明による好適な実施の形態について、図１、図２に基づいて詳細に説明すると、球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、該硬化型樹脂層（１）に必要に応じて保護膜材（３）を設けて硬化型樹脂層（１）を保護し、ボール側の中空球状チューブ（Ｂ）の表面には、触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、劣化防止用の保護膜材を設けて、該保護膜層（３）を形成したことを特徴とする球技用ボールにおける外皮側とボール側との接着構造からなるものである。   Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to FIGS. 1 and 2. In a ball for ball games, a curable resin is used on the back surface of the skin material (A) on the outer skin side. A resin layer (1) is formed, and a protective film material (3) is provided on the curable resin layer (1) as necessary to protect the curable resin layer (1). ) Is formed with a catalyst or a curing agent containing a catalyst, and a protective film material for preventing deterioration is provided on the curing agent layer (2). It is composed of an adhesion structure between the outer skin side and the ball side in the ball game ball characterized by forming the layer (3).

次に、この発明の他の実施例を図面に基づいて説明すると、球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、触媒または、触媒を含む硬化剤を設けて硬化剤層（２）を形成し、該硬化剤層（２）に、劣化防止用の保護膜材を設けて保護膜層（３）を形成し、ボール側の中空球状チューブ（Ｂ）の表面には、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、必要に応じて保護膜材（３）を設けて、硬化型樹脂層（１）を保護するように形成したことを特徴とする球技用ボールにおける外皮側とボール側との接着構造からなるものである。   Next, another embodiment of the present invention will be described with reference to the drawings. In a ball for ball games, a catalyst or a curing agent containing the catalyst is provided on the back surface of the skin material (A) on the outer skin side to provide a curing agent layer ( 2), a protective film material for preventing deterioration is provided on the curing agent layer (2) to form a protective film layer (3), and the surface of the ball-side hollow spherical tube (B) is cured. A ball game characterized in that a curable resin layer (1) is formed using a mold resin, and a protective film material (3) is provided as necessary to protect the curable resin layer (1). It is composed of an adhesive structure between the outer skin side and the ball side of the ball for use.

さらに、この発明の他の実施例を図面に基づいて説明すると、球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、該硬化型樹脂層（１）に反応抑制層（４）を形成し、さらに、該反応抑制層（４）に、触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、必要に応じて保護膜材（３）を設け、ボール側の中空球状チューブ（Ｂ）の表面には、何も設けないことを特徴とする球技用ボールにおける外皮側とボール側との接着構造からなるものである。   Furthermore, another embodiment of the present invention will be described with reference to the drawings. In a ball for ball games, a curable resin layer (1) is formed on the back surface of the outer skin material (A) using a curable resin. The reaction suppressing layer (4) is formed on the curable resin layer (1), and the curing agent layer (2) is further formed on the reaction suppressing layer (4) using a catalyst or a curing agent containing a catalyst. A ball for ball games, wherein the hardener layer (2) is provided with a protective film material (3) as required, and nothing is provided on the surface of the ball-side hollow spherical tube (B). It consists of an adhesion structure between the outer skin side and the ball side.

また、さらに、この発明のさらに他の実施例を図面に基づいて説明すると、球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、何も設けないで、ボール側の中空球状チューブ（Ｂ）の表面に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、該硬化型樹脂層（１）に反応抑制層（４）を形成し、さらに、該反応抑制層（４）に触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、必要に応じて保護膜層（３）を設けて、硬化型樹脂層（１）を保護するように構成したことを特徴とする球技用ボールにおける外皮側とボール側との接着構造からなるものである。   Further, still another embodiment of the present invention will be described with reference to the drawings. In a ball for ball games, a hollow spherical tube on the ball side (without any provision on the back surface of the skin material on the outer skin side (A) A curable resin layer (1) is formed on the surface of B) using a curable resin, a reaction suppression layer (4) is formed on the curable resin layer (1), and the reaction suppression layer (4) is further formed. ) Using a catalyst or a curing agent containing a catalyst, a curing agent layer (2) is formed, and a protective film layer (3) is provided on the curing agent layer (2) as necessary, so that a curable resin layer is formed. (1) It consists of the adhesion structure of the outer skin side and ball side in the ball | ball game ball characterized by protecting so that it may protect.

尚、劣化防止用の保護膜材（３）とは、要するに、触媒または、触媒を含む硬化剤を用いた硬化剤層（２）を被覆するために貼着される剥離シートである。   In addition, the protective film material (3) for preventing deterioration is, in short, a release sheet that is stuck to cover the curing agent layer (2) using a catalyst or a curing agent containing a catalyst.

そして、反応抑制層（４）は、硬化型樹脂と触媒または、触媒を含む硬化剤を用いて硬化剤とが、反応しないように介在させておくものであり、具体的には、ミクロン単位の微粒子状粉体の層であってもよく、また、非耐熱性の薄いシート材であってもよい。但し、接着時の加熱・圧着時により溶けてしまい、消滅してしまうような素材である。
しかし、この反応抑制層（４）は、なくても良い場合がある。 The reaction suppression layer (4) is a layer in which a curable resin and a catalyst or a curing agent containing a catalyst are used so as not to react with each other. It may be a layer of fine particle powder or a non-heat resistant thin sheet material. However, it is a material that melts and disappears during heating and pressure bonding during bonding.
However, this reaction suppression layer (4) may not be necessary.

尚、硬化型樹脂を塗布した硬化型樹脂層（１）には保護膜（３）を設けてもよく、また、この硬化型樹脂（１）とは、反応形接着剤の一種であり、硬化剤により、あるいは硬化型樹脂（１）中の硬化剤が、反応硬化するものであり、接着強さ、耐熱性、耐水性、接着作業性に優れている。   The curable resin layer (1) coated with the curable resin may be provided with a protective film (3). The curable resin (1) is a kind of reactive adhesive and is cured. The curing agent in the curable resin (1) or the curing agent in the curable resin (1) is reactively cured, and is excellent in adhesion strength, heat resistance, water resistance, and adhesion workability.

また、硬化剤（２）は触媒型を用いるものであり、かつ、熱硬化型のものであり、劣化防止用の保護膜（３）は、例えば、剥離シートであってもよい。   Moreover, the curing agent (2) uses a catalyst type and is a thermosetting type, and the protective film (3) for preventing deterioration may be, for example, a release sheet.

この発明による球技用ボールにおける外皮側とボール側との接着構造の技術を確立し、それに基づいて球技用ボールを製造・販売することにより、産業上の利用可能性があるものである。   Establishing the technology of the adhesion structure between the outer skin side and the ball side in the ball game ball according to the present invention, and manufacturing and selling the ball game ball based on it, there is industrial applicability.

この発明に使用する表皮材（Ａ）の一実施例を示す斜視図である。It is a perspective view which shows one Example of the skin material (A) used for this invention. この発明に使用する中空球状チューブ（Ｂ）の一実施例を示す一部欠截断面図である。It is a partially broken sectional view showing an example of a hollow spherical tube (B) used in the present invention. この発明に使用する表皮材（Ａ）と中空球状チューブ（Ｂ）との接着状態を示す一部欠截断面図である。It is a partially broken sectional view which shows the adhesion state of the skin material (A) used for this invention, and a hollow spherical tube (B). この発明に使用する表皮材（Ａ）の他の実施例を示す斜視図である。It is a perspective view which shows the other Example of the skin material (A) used for this invention. この発明に使用する中空球状チューブ（Ｂ）の他の実施例を示す一部欠截断面図である。It is a partially broken sectional view which shows the other Example of the hollow spherical tube (B) used for this invention. この発明に使用する表皮材（Ａ）と中空球状チューブ（Ｂ）との接着状態を示す一部欠截断面図である。It is a partially broken sectional view which shows the adhesion state of the skin material (A) used for this invention, and a hollow spherical tube (B). この発明に使用する表皮材（Ａ）のさらに他の実施例を示す一部欠截斜視図である。It is a partial notch perspective view which shows other Example of the skin material (A) used for this invention. この発明に中空球状チューブ（Ｂ）のさらに他の実施例を示す一部欠截断面図である。It is a partially broken sectional view which shows other Example of a hollow spherical tube (B) in this invention. この発明に使用状する表皮材（Ａ）と中空球状チューブ（Ｂ）との接着状態を示す一部欠截断面図である。It is a partially broken sectional view which shows the adhesion state of the skin material (A) used for this invention, and a hollow spherical tube (B). この発明に使用する表皮材（Ａ）のさらに他の実施例を示す一部欠截斜視図である。It is a partial notch perspective view which shows other Example of the skin material (A) used for this invention. この発明に中空球状チューブ（Ｂ）のさらに他の実施例を示す一部欠截断面図である。It is a partially broken sectional view which shows other Example of a hollow spherical tube (B) in this invention. この発明に使用状する表皮材（Ａ）と中空球状チューブ（Ｂ）との接着状態を示す一部欠截断面図である。It is a partially broken sectional view which shows the adhesion state of the skin material (A) used for this invention, and a hollow spherical tube (B).

符号の説明Explanation of symbols

１ 硬化型樹脂層
２ 触媒または、触媒を含む硬化剤を用いて硬化剤層
３ 保護膜層
４ 反応抑制層
Ａ 外皮側の表皮材
Ｂ ボール側の中空球状チューブ DESCRIPTION OF SYMBOLS 1 Curing-type resin layer 2 Curing agent layer using catalyst or hardening | curing agent containing a catalyst 3 Protective film layer 4 Reaction suppression layer A Skin material on the outer skin side B Hollow spherical tube on the ball side

Claims (6)

球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、該硬化型樹脂層（１）に必要に応じて保護膜材（３）を設けて硬化型樹脂層（１）を保護し、ボール側の中空球状チューブ（Ｂ）の表面には、触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、劣化防止用の保護膜材を設けて、該保護膜層（３）を形成したことを特徴とする球技用ボールにおける外皮側とボール側との接着構造。   In a ball for ball games, a curable resin layer (1) is formed on the back surface of the skin material (A) on the outer skin side using a curable resin, and a protective film material is formed on the curable resin layer (1) as necessary. (3) is provided to protect the curable resin layer (1), and a hardener layer (2) is formed on the surface of the ball-side hollow spherical tube (B) using a catalyst or a hardener containing the catalyst. And a protective film material for preventing deterioration provided on the hardener layer (2) to form the protective film layer (3). . 球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、劣化防止用の保護膜材を設けて保護膜層（３）を形成し、ボール側の中空球状チューブ（Ｂ）の表面には、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、必要に応じて保護膜材（３）を設けて、硬化型樹脂層（１）を保護するように形成したことを特徴とする球技用ボールにおける外皮側とボール側との接着構造。   In the ball for ball games, a hardener layer (2) is formed on the back surface of the skin material (A) on the outer skin side using a catalyst or a hardener containing the catalyst, and the hardener layer (2) is used for preventing deterioration. A protective film material (3) is formed to form a protective film layer (3), and a curable resin layer (1) is formed on the surface of the hollow spherical tube (B) on the ball side using a curable resin. Accordingly, a protective film material (3) is provided so as to protect the curable resin layer (1), and the adhesion structure between the outer skin side and the ball side in the ball game ball is characterized. 球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、該硬化型樹脂層（１）に、反応抑制層（４）を形成し、さらに、該反応抑制層（４）に、触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、必要に応じて保護膜材（３）を設け、ボール側の中空球状チューブ（Ｂ）の表面には、何も設けないことを特徴とする球技用ボールにおける外皮側とボール側との接着構造。   In a ball for ball games, a curable resin layer (1) is formed on the back surface of the skin material (A) on the outer skin side using a curable resin, and the reaction suppressing layer (4) is formed on the curable resin layer (1). Further, a curing agent layer (2) is formed on the reaction suppression layer (4) using a catalyst or a curing agent containing a catalyst, and the curing agent layer (2) is protected as necessary. An adhesion structure between a skin side and a ball side in a ball for ball games, characterized in that a membrane material (3) is provided and nothing is provided on the surface of the ball-shaped hollow spherical tube (B). 球技用ボールにおいて、外皮側の表皮材（Ａ）の裏面に、何も設けないで、ボール側の中空球状チューブ（Ｂ）の表面に、硬化型樹脂を用いて硬化型樹脂層（１）を形成し、該硬化型樹脂層（１）に、反応抑制層（４）を形成し、さらに、該塗膜剤層（４）に触媒または、触媒を含む硬化剤を用いて硬化剤層（２）を形成し、該硬化剤層（２）に、必要に応じて保護膜層（３）を設けて、硬化型樹脂層（１）を保護するように構成したことを特徴とする球技用ボールにおける外皮側とボール側との接着構造。   In the ball for ball games, the curable resin layer (1) is applied to the surface of the hollow spherical tube (B) on the ball side using a curable resin without providing anything on the back surface of the skin material (A) on the outer skin side. And forming a reaction suppressing layer (4) on the curable resin layer (1), and further using a catalyst or a curing agent containing a catalyst on the coating agent layer (4). ), And a protective film layer (3) is provided on the curing agent layer (2) as necessary to protect the curable resin layer (1). Bonding structure between the outer skin side and the ball side. 劣化防止用の保護膜材が、剥離シートであることを特徴とする請求項１または２または３または４記載の外皮側とボール側との接着構造。   The adhesion structure between the outer skin side and the ball side according to claim 1, wherein the protective film material for preventing deterioration is a release sheet. 反応抑制層が、微粒子状パウダー層、あるいは、非耐熱性の薄いシート材から選ばれたものであることを特徴とする請求項３または４記載の外皮側とボール側との接着構造。   The adhesion structure between the outer skin side and the ball side according to claim 3 or 4, wherein the reaction suppression layer is selected from a particulate powder layer or a non-heat-resistant thin sheet material.
JP2004273016A 2004-09-21 2004-09-21 Adhesion method between outer skin side and ball side in ball game balls Expired - Fee Related JP4656898B2 (en)

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