JPH0686756U - Gut - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the resilience of a gut used in a racket such as tennis or badminton when hitting a ball. [Structure] A spun yarn 2 or a crimped yarn 4 is twisted around the outer periphery of a core yarn 1 directly or together with a side wound yarn 3, and these are fixed with a resin 5 to form a resin coating layer 6 on the outer layer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synthetic fiber gut used in rackets for hard tennis, soft tennis, badminton, squash, and the like, and particularly to a gut having excellent impact resilience when hitting a ball.

[0002]

[Prior art]

 Traditionally, as a racket gut, a natural gut made of twisted yarn of animal fibers such as intestines of cattle and sheep and whale muscle has been used for a long time. This natural gut made of twisted animal fibers has excellent resilience, has a little slack, and produces a pleasant hitting sound, so it is still used only partly today. However, natural gut has a short life due to poor water resistance and is very expensive.

Therefore, in recent years, many guts made of synthetic fibers such as polyamide and polyester have been proposed. For example, a core layer made of a monofilament of polyamide fiber is attached to the outer peripheral surface of a core yarn with a large number of monofilaments having a diameter smaller than that of the core yarn with an adhesive to form a wound layer. The outer peripheral surface of this winding layer is coated with a polyamide resin, thermoplastic urethane elastomer, or the like, or a large number of monofilaments having a diameter smaller than that of the core thread provided so as to surround the core thread. Some of them have a side wound yarn of monofilament between a core wound yarn made of filament and a coating layer formed on the upper surface thereof, that is, at a position outside the core wound yarn.

However, when a gut as described above is used, the gut can be stretched to some extent by the striking force to absorb some impact of the ball, but it is necessary to stretch the gut with a predetermined tension. , There is a certain limit to absorbing shock. Further, in the above-mentioned conventional gut, since monofilament or multifilament of polyamide fiber is used as the core winding yarn or the side winding yarn, it has high strength but lacks resilience, softness and abrasion resistance. was there.

In order to solve the above-mentioned problems, an aromatic polyamide fiber having good tensile strength and good wear resistance is covered or braided on the outer periphery of a core yarn made of nylon, polyester or metal fine wire, A gut made by twisting a polyamide fiber with a nylon fiber has been proposed.

[0006]

[Problems to be solved by the device]

 However, the gut having such a structure has a problem that it is inferior in durability and resilience due to impact even though it has excellent tensile strength and wear resistance. In particular, a metal thin wire as a core yarn and an aromatic polyamide fiber coated and braided on the outer periphery of the core yarn lacks the adhesiveness between the two, so that damage is observed during use and there is a problem in durability.

The present invention has been made in order to solve the above problems, and it is possible to obtain a gut which has high strength, repulsion and abrasion resistance, and excellent durability against impact. In particular, the purpose is to provide a gut having a large repulsive force at the time of hitting a ball.

[0008]

[Means for Solving the Problems]

 That is, the gut of the present invention uses spun yarn, crimped yarn, etc. alone or in combination with the outer periphery of the core yarn, or winds them together with the long fiber side winding yarn, and these and the core yarn are used as a resin adhesive. Then, the resin coating layer is formed on the outermost layer.

[0009]

[Action]

 The gut according to the present invention has spun yarn and / or crimped yarn wound around the outer periphery of the core yarn, and these yarns are entangled to function as a cushion and exhibit excellent impact resilience when hitting a ball. .

In this invention, as the core yarn, nylon fiber such as nylon 6, nylon 66, or a copolymer of nylon 6 and nylon 66, polyester fiber, or polyolefin fiber is used as a monofilament or multifilament, respectively. Of these, nylon fiber is most preferable.

As the side winding yarn, the same material as the core yarn such as nylon fiber, polyester fiber and polyolefin fiber is used, but these may be used as individual monofilament or multifilament or as twisted yarn thereof.

In addition, as the spun yarn, cotton, wool, rayon staple, and cuplast are used as twisted yarn. As the crimped yarn, rayon and cupra are used as well as nylon and polyester fiber are twisted and twisted. It is used by twisting a yarn that has been processed by the untwisting method, the pushing method, the false twisting method, or the like. These spun yarns or crimped yarns are (1) braided on the outer periphery of the core yarn, (2) alternately braided on the outer periphery of the core yarn with side winding yarns, (3) braided on the outer periphery of the core yarn. The twisted yarn of the spun yarn and the crimped yarn can also be used in combination.

The side winding yarn, the spun yarn, the crimped yarn and the core yarn, which are braided around the outer periphery of the core yarn in this way, are fixed to each other with a resin adhesive. , Urethane type and acrylic type are suitable. A resin coating layer is formed on the outer periphery of the cord obtained in this way, to prevent fiber fatigue during tensioning of the gut and during hitting, and to improve durability and wear resistance. Nylon-based, urethane-based, silicone-based, and fluorine-based are suitable.

[0014]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. Embodiment 1 FIG. 1 is a cross-sectional view of a gut showing an embodiment of the present invention, in which reference numeral 1 is a core yarn made of 3000 denier nylon 6 monofilament. The spun yarn 2 made of the 30th cotton yarn 2a is wound. Reference numeral 5 is a fixing layer in which the core yarn 1 and the spun yarn 2 are fixed together using a phenol resin adhesive. Then, a coating layer 6 of nylon resin was formed on the outer layer of the fixed string to obtain a gut.

Example 2 The same 3000 denier nylon 6 monofilament as in Example 1 was used as the core yarn 1, and the side winding yarn 3 consisting of six 210 denier nylon 6 monofilaments 3a was used on the outer periphery of the core yarn 1. The spun yarn 2 consisting of the 30th cotton yarn 2a was alternately wound, and at this time, the core yarn 1, the spun yarn 2 and the side wound yarn 3 were fixed 5 using a phenol resin adhesive. A nylon resin coating layer 6 was formed on the outer layer of the string thus obtained to obtain a gut having the structure shown in FIG.

Example 3 Nylon 6 monofilament of 3000 denier was used as the core yarn 1, and 215 denier side wound yarn 3 composed of 12 polyethylene fiber monofilaments 3b was arranged on the outer periphery of the core yarn 1 and further 19 of it were arranged. A spun yarn 2 made of 30th cotton yarn 2a is braided, these are bonded and fixed 5 with a nylon adhesive, and a urethane resin coating layer 6 is formed on the outer layer to obtain a gut having the structure shown in FIG. It was

Example 4 A monofilament of polyethylene terephthalate fiber of 3000 denier was used as a core yarn 1a, and 11 cupra crimped yarns 4a were wound around the outer periphery thereof, and the core yarn 1 and the crimped yarn 4a were mixed with a phenol resin. Adhesive fixing 5 was performed with an adhesive, and a coating layer 6 made of nylon resin was formed thereon to obtain a gut having the structure shown in FIG.

Example 5 Nylon 6 monofilament of 3000 denier was used as the core thread 1, and the side winding thread 3 consisting of 6 pieces of 210 denier nylon 6 monofilament 3a and five 30th cotton threads were used on the outer circumference. Alternately wound crimped yarns 4b were alternately wound, and at this time, the core yarn 1 and the side wound yarns 3 and the crimped yarns 4b were fixed 5 using a phenol resin adhesive. A nylon resin coating layer 6 was formed on the outer layer of the string thus obtained to obtain a gut having the structure shown in FIG.

Example 6 A monofilament of polyethylene terephthalate fiber of 3000 denier was used as a core yarn 1a, and a side wound yarn 3 of 12 polyethylene fiber monofilaments 3b of 215 denier was arranged around the core yarn 1a, and 19 yarns were further provided on the side wound yarn 3. The 210 denier nylon 6 monofilament crimped yarn 4c is braided, these are fixed with a nylon adhesive 5 and then a nylon resin coating layer 6 is formed on the outer layer to obtain a gut having the structure shown in FIG. It was

Each of the guts obtained in the above examples has a high strength, and when it is stretched and used on a tennis racket, it has a particularly excellent resilience as compared with a conventional gut. In addition, it was excellent in relaxation resistance and durability even after repeated use.

[0021]

[Effect of device]

 As described above, the gut of the present invention uses spun yarn or crimped yarn on the outer periphery of the core yarn alone or together with the side wound yarn, so that the spun yarn or crimped yarn is used as the gut. It gives a soft and stretchy feel, and when it hits the ball, it acts as a cushion for excellent resilience.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a gut according to the present invention.

FIG. 2 is a schematic sectional view showing another embodiment of the gut according to the present invention.

FIG. 3 is a schematic sectional view showing another embodiment of the gut according to the present invention.

FIG. 4 is a schematic sectional view showing another embodiment of the gut according to the present invention.

FIG. 5 is a schematic cross-sectional view showing another embodiment of the gut according to the present invention.

FIG. 6 is a schematic cross-sectional view showing another embodiment of the gut according to the present invention.

[Explanation of symbols]

 1 core yarn 2 spun yarn 3 side wound yarn 4 crimped yarn 5 resin fixing layer 6 resin coating layer

Claims (6)

[Scope of utility model registration request] 1. A gut obtained by fixing a core yarn and a plurality of spun yarns wound around the core resin with a resin and forming a resin coating layer on the outer layer. 2. A gut obtained by fixing a core yarn, a plurality of filament-side wound yarns alternately wound around the outer periphery thereof and a spun yarn with a resin, and forming a resin coating layer on the outer layer. 3. A core yarn, a plurality of long-fiber side winding yarns wound around the outer periphery thereof, and a plurality of spun yarns wound around the outer periphery of the side winding yarns are fixed to each other with a resin, and an outer layer is coated with a resin. Gut formed by forming layers. 4. A gut obtained by fixing a core yarn and a plurality of crimped yarns wound around the core resin with a resin and forming a resin coating layer on the outer layer. 5. A gut obtained by fixing a core yarn, a plurality of filament-side wound yarns alternately wound around the outer periphery thereof, and a crimped yarn with a resin, and forming a resin coating layer on the outer layer. 6. A core yarn, a plurality of long-fiber side winding yarns wound around the outer periphery of the core yarn, and a plurality of crimped yarns wound around the outer periphery of the side winding yarns are fixed to each other with a resin to form an outer layer. A gut formed by forming a resin coating layer.