JPH11128405A - Racket gut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form layers with filaments in specified combination and cover a synthetic resin surface coating layer for good hitting feelings and excellent durability and repulsiveness. SOLUTION: A racket gut has a core component 2 formed from a synthetic resin monofilament, a middle layer 3 in which plural monofilaments 3a with the diameter being smaller than the monofilament in the core component 2 are arranged outside the core component 2 and adhesive 3b is filled among the monofilaments 3a, an outer layer 4 in which synthetic fiber multifilaments 4a of 20-60 wt.% per all fiber amount are arranged outside the middle layer 3 and adhesive 4b is filled in gaps among the multifilaments 4a and a surface coating layer 5 formed of synthetic resin to cover the outer periphery of the outer layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a racket gut having excellent shot feeling, durability and resilience.

[0002]

2. Description of the Related Art Conventionally, as a structure of a racket gut used for rackets such as tennis, badminton, and squash,
(1) A configuration in which the outer peripheral surface of a monofilament is covered with a surface coating layer, (2) A configuration in which a core component is a single monofilament, a plurality of monofilaments are arranged around the core component, and further covered with a surface coating layer, (3) The core component is a single monofilament, the multifilament is arranged around the core component, and further covered with a surface coating layer. (4) The outer periphery of the multifilament is covered with a surface coating layer. (5)
The core component is roughly divided into a multifilament, a plurality of monofilaments arranged around the core component, and further covered with a surface coating layer.

Here, the characteristics of the racket gut are required to be excellent in durability, resilience, good feel at impact, and the like. Also in the configuration, there is a problem that the shot feeling is impaired when trying to improve the durability and resilience, and the durability and resilience are impaired when trying to improve the hit feeling, and the hit feeling, durability and At present, racket guts having excellent resilience have not yet been developed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a racket gut which has a good feel at impact, and also has excellent durability and resilience.

[0005]

Means for Solving the Problems The present inventor has made intensive studies to achieve the above object, and as a result, has found that a core component, an intermediate layer formed outside the core component, and an outer layer formed outside the intermediate layer. In a racket gut comprising an outer layer formed on the outer layer and a surface coating layer covering the outer peripheral surface of the outer layer, by forming a filament forming each layer into a specific combination,
It has been found that a racket gut having a good feel at impact and having excellent durability and resilience can be obtained.

That is, by forming the core component from a single monofilament made of synthetic fiber, durability and resilience are produced, and the outer layer is formed in an amount of 20 to 6 with respect to the total fiber amount.
By forming a multi-filament made of synthetic fiber of 0% by weight and filling the gap between the multi-filaments with an adhesive, softness of shot feeling and vibration absorption are produced, and further, the intermediate layer is formed by a plurality of mono-filaments. By filling the gap with an adhesive, durability and resilience can be improved without impairing the original feel at impact, vibration absorption, and surface protection is made by a surface coating layer made of synthetic resin, In particular, by including metal powder in the synthetic resin forming the surface coating layer, the durability can be dramatically improved, and such a configuration not only combines the above characteristics but also reduces the production cost of a racket. It was found that a gut for use was obtained, and the present invention was accomplished.

Accordingly, in order to achieve the above object, the present invention provides a core component composed of a single monofilament made of synthetic fiber and a plurality of monofilaments having a diameter smaller than the monofilament outside the core component. An intermediate layer filled with an adhesive between the monofilaments, and a multifilament made of synthetic fiber, particularly a polyamide-based fiber of 20 to 60% by weight based on the total fiber amount, are arranged outside the intermediate layer. Forming a racket gut comprising: an outer layer in which gaps are filled with an adhesive; and a surface coating layer made of a synthetic resin, particularly a polyamide resin, for coating the outer peripheral surface of the outer layer, and forming the surface coating layer. The gut for a racket described above, wherein the synthetic resin contains metal powder.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described in more detail with reference to FIG. 1. A racket gut 1 of FIG. 1 covers a core component 2 and an outer peripheral surface of the core component 2. It comprises an intermediate layer 3, an outer layer 4 covering the outer peripheral surface of the intermediate layer 3, and a surface coating layer 5 further covering the outer peripheral surface of the outer layer 4.

Here, the core component 2 is formed of a single monofilament made of a synthetic fiber, and the type of the synthetic fiber monofilament is particularly limited as long as the monofilament is usually used for a racket gut. For example, polyamide fibers, polyester fibers, polyvinylidene fluoride fibers, polyetheretherketone fibers,
A monofilament made of polyphenylene fiber or the like can be used, but in consideration of durability and shot feeling,
Among these, polyamide fibers such as nylon 6, nylon 66, and copolymerized nylon of nylon 6 and nylon 66 are particularly suitable.

The thickness of the monofilament is not particularly limited, but is usually 0.3 to 1.1 mm, preferably 0.4 to 1.0 mm, more preferably 0.5 to 1.0 mm.
It is suitable to be 0.9 mm. If the core component 2 is too thin, sufficient durability and resilience may not be obtained in some cases. If the core component 2 is too thick, the thicknesses of the intermediate layer 3 and the outer layer 4 cannot be sufficiently arranged, which is not desirable.

The intermediate layer 3 covering the outer peripheral surface of the core component 2 comprises:
A plurality of monofilaments 3a having a diameter smaller than the monofilament forming the core component 2 are used, and an adhesive 3b is filled between the monofilaments 3a. The type of the monofilament forming the intermediate layer 3 is not particularly limited, and a monofilament composed of the same fiber as the core component 2 can be used. For the same reason, the polyamide fiber is particularly preferably used. used. The thickness of the monofilament 3a forming the intermediate layer 3 needs to be smaller than that of the monofilament forming the core component 2, and is usually 5 to 70% of the thickness of the monofilament forming the core component 2, preferably Is 7 to 50
%, More preferably 10 to 30%,
Specifically, 0.07 to 0.4 mm, preferably 0.1
It is preferable to use the one having a thickness of 0.3 to 0.3 mm, more preferably 0.1 to 0.2 mm. If the monofilament 3a forming the intermediate layer 3 is too thin, sufficient durability and resilience may not be obtained. On the other hand, if the monofilament 3a is too thick, the thickness of the outer layer 4 cannot be sufficiently arranged, which is not desirable. The number of monofilaments 3a used can be appropriately selected in relation to the thickness of the core component 2. The type of the adhesive 3b that fills the space between the monofilaments 3a is not particularly limited, and those that can bond the above-described monofilaments are used. For example, a polyamide-based adhesive such as a nylon resin, a urethane-based adhesive is used. Agents and the like can be used, and a polyamide adhesive is particularly preferred.

Next, an outer layer 4 covering the outer peripheral surface of the intermediate layer 3
Is formed by a multifilament 4a made of synthetic fiber, and a gap between the multifilaments 4a is formed by an adhesive 4b.
Is filled by The type of the multifilament 4a is not particularly limited, and a multifilament composed of the same fibers as the core component 2 and the monofilament 3a can be used. Polyamide fibers are preferably used. The thickness and number of microfibers constituting the multifilament 4a are not particularly limited,
Considering strength / durability, resilience, diameter 0.01 ~
0.05 mm, preferably 0.01-0.04 mm, more preferably 0.02-0.03 mm fiber
It is suitable to twist 0 to 1000 strands, preferably 100 to 700 strands, more preferably 150 to 400 strands.
Here, in the case of the present invention, the used amount of the multifilament 4a needs to be 20 to 60% by weight, preferably 20 to 40% by weight based on the total fiber amount. The desired softness of shot feeling and vibration absorption cannot be obtained. In addition, the multifilament 4a
As the adhesive 4b that fills the gap, the same adhesive as the adhesive that fills the space between the monofilaments 3b is preferably used. In addition, the thickness of the outer layer 4 is usually 0.1 to
It is preferable that the thickness be 0.4 mm, particularly 0.2 to 0.3 mm.

The surface coating layer 5 of the racket gut 1 of the present invention is formed by coating the outer peripheral surface of the outer layer 4 with a synthetic resin, and the kind of the synthetic resin is not particularly limited. For example, a polyamide resin such as nylon 6, nylon 66, a copolymer of nylon 6 and nylon 66, a polyurethane resin, or the like can be used. Considering the properties, strength and durability, polyamide resins are particularly suitable. The layer thickness of the surface coating layer 5 is not particularly limited, and is usually preferably 10 to 50 μm, particularly preferably 20 to 40 μm. Here, in the case of the present invention,
By using a mixture of the synthetic resin and the metal powder, the durability can be remarkably improved. Examples of the metal powder include titanium, gold, silver, copper, zinc, lead, aluminum, nickel, iron, tin, chromium,
Cobalt and the like can be mentioned, and these can be used alone or in an appropriate combination of two or more. Among these, titanium is particularly effective. The amount of the metal powder is not particularly limited,
Usually, 0.1 to 20% by weight, preferably 1 to 15% by weight, more preferably 3 to 10% by weight is suitable for the total amount of the synthetic resin forming the surface coating layer 5. If the amount of the metal powder is too small, the effect of the compounding may not be sufficiently obtained, and if it is too large, the shot feeling may be impaired. The particle size of the metal powder is not particularly limited and can be appropriately selected.

The method for producing a racket gut according to the present invention comprises:
It is not particularly limited, for example, after forming the intermediate layer by twisting and arranging a plurality of the small diameter monofilaments impregnated with the adhesive on the outside of the core component monofilament, and forming the intermediate layer outside the intermediate layer. The multifilament impregnated with the adhesive is twisted and arranged to form an outer layer, and the outer peripheral surface of the outer layer is further coated with the synthetic resin to form a surface coating layer.

As described above, the racket gut of the present invention can obtain durability and resilience by forming the core component from a single monofilament made of synthetic fiber. Softness and vibration absorption are obtained, and by further interposing an intermediate layer formed by a plurality of monofilaments, durability and resilience can be improved without impairing the original feel at impact and vibration absorption. it can. Then, the surface is protected by the surface coating layer. In the case of the present invention, the durability can be remarkably improved particularly when the surface coating layer is formed of a synthetic resin containing a metal powder.

[0016]

According to the present invention, each layer is composed of the filaments of the above-mentioned specific combination, and further, the surface coating layer of the above-mentioned synthetic resin is coated, so that a good shot feeling and excellent durability and durability can be obtained. It also has resilience.

Therefore, the racket gut of the present invention is useful as a gut for various rackets such as tennis, badminton, and squash.

[0018]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

Example 1 A core component having a diameter of 0.75
A single monofilament made of 6 mm nylon 6 fiber is used, and as an intermediate layer, 23 nylon 66 monofilaments having a diameter of 0.125 mm are impregnated with a nylon resin and twisted and arranged.
The nylon 6 and nylon 66 copolymer multifilaments were impregnated with nylon resin and twisted. This multifilament amount was about 25% by weight based on the total fiber amount. Further, as a surface coating layer, nylon 6 and nylon 66 were coated with a resin having a copolymerization ratio of 90/10 to a thickness of 30 μm to obtain a racket gut of Example 1 having a thickness of 1.30 mm.

Comparative Example 1 The same procedure as in Example 1 was repeated except that the copolymer multifilament was used in place of the intermediate layer and the outer layer so as to be about 35% by weight with respect to the total fiber amount. A racket gut of Comparative Example 1 was obtained in the same manner as in Example 1 except that it was arranged around the racket.

Example 2 The procedure of Example 1 was repeated, except that the surface coating layer was replaced with a resin containing 5% by weight of titanium powder in a copolymer of nylon 6 and nylon 66. A racket gut of Example 2 was obtained in the same manner as in Example 1.

The racket guts of the above embodiment and the comparative example were each stretched over a tennis racket by a conventional method, and the shot feeling and durability of each racket were compared. The gut of Example 1 was the gut of Comparative Example 1. In comparison with the results, it was recognized that the durability and the resilience were improved while the shot feeling was maintained. On the other hand, it was recognized that the gut of Example 2 had further improved durability and resilience while maintaining the shot feeling as compared with the gut of Example 1. The shot feeling Each racket was actually tested by the player, and the shot feeling was compared. Durability test The durability was compared with a gut friction wear tester. Resilience test each racquet player actually test hitting, measured ball speed by high-speed video and compared.

[Brief description of the drawings]

FIG. 1 is a sectional view of a racket gut according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Racket gut 2 Core component 3 Intermediate layer 3a Monofilament 3b Adhesive 4 Outer layer 4a Multifilament 4b Adhesive 5 Surface coating layer

Claims (3)

[Claims] 1. A core component composed of a single monofilament made of synthetic fiber, and a plurality of monofilaments having a diameter smaller than the monofilament are arranged outside the core component.
An intermediate layer in which the monofilaments are filled with an adhesive, and a multifilament made of synthetic fiber of 20 to 60% by weight based on the total fiber amount are arranged outside the intermediate layer, and a gap between the multifilaments is formed by an adhesive. A gut for a racket, comprising: an outer layer filled with a resin; and a surface coating layer made of a synthetic resin for coating an outer peripheral surface of the outer layer. 2. The racket gut according to claim 1, wherein the multifilament forming the outer layer is a polyamide-based fiber, and the synthetic resin forming the surface coating layer is a polyamide-based resin. 3. The racket gut according to claim 1, wherein the synthetic resin forming the surface coating layer contains a metal powder.