KR840000169B1 - Ball - Google Patents

Abstract

Gas-sealed balls are composed of (a) a reinforcing layer, which is formed by rolling reinforcing filaments and elastic filaments around a rubber-like gas-contg. tube, (b) a multi-layered rubber formed by vulcanization thereon, (c) an outer surface layer of natural or synthetic leathers, which is attached to a adhesion layer following the rubber layer.

Description

Gas enclosed bowl

1 is a partial longitudinal sectional view of a gas-filled bowl of the present invention having an overlapping rubber layer between the wound and wound layer wound as a thread

The present invention relates to the improvement of ball-type gas-filled bowls, such as soccer balls, volleyball bowls, and basketball bowls, which can be inflated as gas, and more particularly, to gas-filled bowls with a significant improvement in touch.

If the conventional gas-filled bowl for ball game is roughly divided into two types. That is, one is wound on a rubber gas-sealed tubing, which is the innermost layer, reinforcement or reinforcement with a cotton wrap, coated with overlapping rubber on it, and then vulcanized by molding, or by applying an adhesive directly on the reinforcing filler. Attached so-called bowls attached, the other is a so-called sewn bowl which is coated on the rubber tubing without sealing the skin materials together.

As a general property of the patch, it is excellent in durability, but the touch is inferior to the stitched to some extent. In terms of only volleyball bowls, even though the same patch is used, the structure of the nylon yarn-wound structure is many times superior in durability compared to that of the cotton cloth reinforcement structure, but the touch is inferior. Volleyball bowls, soccer bowls, etc. are particularly important for the feel of the bowl, so the patched balls are often attracted by the players.

In order to improve the tactile feel of these secretions, for example, an improvement having a three-layered reinforcement layer as disclosed in Japanese Patent Publication No. 48-40024 or a Japanese publication No. Gobo No. Improvements have already been made regarding structures in which two different kinds of yarns are wound and reinforced with respect to elongation (or elastic modulus) as proposed in 52-32292.

However, the improvement method regarding the touch of the two patches is not very practical at present because the manufacturing process is very complicated and the improvement effect is not remarkable.

As described above, the patched fabric of the structure wound as a thread has a great drawback that it is inferior to the touch. As a result, various studies have been conducted to improve this bad characteristic. When the urethane elastic yarn (spandex) or rubber yarn which has not been used is present in the reinforcing layer of the reinforcement type gas enclosed bowl wound as a thread, it was found that a very good touch can be imparted to the bowl, thereby completing the present invention. .

That is, urethane elastic rubber or rubber yarn is used in addition to nylon filament yarn or polyester filament yarn, which is conventionally used when making reinforcing transfer body implantable rolls as a thread, and moreover, this urethane elastic yarn or rubber yarn is simultaneously used with the reinforcing filament yarn. By reeling randomly to the bore body, the reinforcing structure of the yarn is fully maintained, while the excellent durability of the yarn is sufficiently maintained, and the urethane elastic yarn or rubber yarn, which is randomly wound in the reinforcing layer wound as a yarn, can absorb strong impact force. It can be greatly improved.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas encapsulated bowl which remarkably improves the touch while maintaining the original excellent durability of a reinforcing structure wound as a thread in a conventional patch bowl.

In order to achieve the above object, in the present invention, a reinforcing layer wound as a yarn formed by winding a reinforcing gyra yarn and an elastic yarn on the surface of a rubber-enclosed tubing made of rubber as a gas, and this thread wound on the surface of the reinforcing layer Provided is a gas encapsulated bowl having an intermediate attached rubber layer formed by molded vulcanization and a skin layer made of natural leather or synthetic leather which is adhesively coated by interposing an adhesive layer on the surface of the overlapping rubber layer.

The above and other objects, aspects, and advantages of the present invention will become more apparent from the following description made in accordance with the accompanying drawings showing embodiments of the present invention and preferred embodiments.

That is, in Fig. 1, reference numeral 1 denotes a gas-sealed tube as a gas, and the tube 1 is irregularly applied at the same time while slightly applying tension to the surface so as not to loosen the reinforcing gyra yarn and elastic yarn. The reinforcement layer 2 wound up and wound as a thread is formed. Urethane elastic yarns (spandex) or rubber yarns are used as the elastic yarns, but either of them is suitable for the smoothness of the finished bowl surface, the goodness of thread loosening during the manufacturing process, and both sides. In the present invention, either one of a rubber yarn obtained from a natural or synthetic rubber lath and a rubber yarn molded by cutting from a raw rubber sheet is used, but a rubber yarn having approximately the following physical properties is well suited.

On the other hand, the reinforcing zip filaments combined with the elastic yarns need not be limited to one type of synthetic fibers such as nylon filament yarn polyester filament yarn, and other fibers having a lower elongation recovery than nylon filament yarn, for example, It can be used together with one or more selected from the group consisting of crimping of synthetic fiber filaments, cotton yarns or blended yarns of cotton and synthetic fibers.

In the specific example of this invention shown in FIG. 1, the overlapping rubber layer 3 is again formed by shaping | curing vulcanization on the surface of the reinforcement layer 2 wound as the yarn formed as mentioned above. As the outermost layer, the skin 5 of natural leather or synthetic leather is adhesively coated on the surface of the overlapping rubber layer 3 with a suitable adhesive layer 4 interposed therebetween.

Next, several examples of bowls made according to the above are described below. In addition, the judgment regarding the touch was based on the judgment of the volleyball bowl members who have 10 to 15 years of volleyball bowl playing careers in the company corresponding to the assignee of this application regarding Examples 1 and 2.

In addition, about 3rd and 4th embodiment, it judged by the touch of this inventor.

Example 1

The method and property of making the bowl used in the present Example are as follows.

Nylon 66 filament yarn (strong 540g, cutting elongation 28%) and commercially available urethane elastic yarn (strength 1.3g / denier, cutting elongation 490%) are braided with 50 denier two strands on the surface of the gas-sealed tubing made of 200mm diameter rubber. Combined, braided with two strands of polyester filament yarn 50 denier (strong 610 g, 20% cut) and urethane elastic yarn, 50 denier nylon 66 yarn (300 g, 26% cut) and urethane elastic yarn Are combined at the same time, the yarn is wound in a caterpillar, a reinforcing layer wound as a thread is formed, the superposed portion of natural rubber is molded and vulcanized on the surface of the reinforcing layer, and an adhesive is applied thereon. Volleyball ball No. 5 made by attaching to the surface Table 1 shows the results of the use performances performed on the conventional products for comparison with 1 to 5. Note the following judgment conditions for each result. This precaution is a common precaution in the second embodiment.

(1) The judgment of the touch averaged the judgments at the time of the volleyball spike and the save (the touch A is the best, and the hands of B and C D deteriorate).

(2) Durability is the number of times until a puncture is made by applying a compressive strain of 33% at a rate of 120 times per minute to a bowl having an internal pressure of 0.5 kg / cm 2.

(3) Bound height is shown as the upper limit height of the bowl when it self-drops on the concrete floor at the height of 1.8 m on the conditions of 0.48 kg / cm <2> and 23 degreeC internal pressure.

Example 2

In addition to nylon 66 filament yarn and urethane elastic yarn same as the first embodiment, on the surface of the tubing same as the embodiment 1, nylon 6 crimped processing yarn, polyester crimping work, cotton yarn, and blended yarn of cotton and nylon (mixed ratio 50 / 50) The same performance results for No.6 to No.5 volleyball bowls made by winding one selected at the same time and then applying 1.5mm thick natural leather on the surface are shown in the second table. do.

Example 3

In Example 3, the 5th size | football football is demonstrated.

Infinite system by simultaneously pulling and arranging nylon 66 filament yarn (strength 840g, 26% cutting elongation) and commercially available urethane elastic yarn (spandex filament yarn) braided with two strands of 70 denier on the surface of a gas-filled tubing made of 212 mm diameter The yarn is wound around the reinforcing layer and molded and cured with natural rubber superimposed rubber on the reinforcing layer, and then coated with a rubber-based adhesive, and finally, a soccer ball No. of the above size made of natural or synthetic leather with a thickness of 1.6 mm. The results of the performances performed for 10 to 12 and the conventional art for comparison are shown in the third table.

In addition, the following points should be noted about each result in Table 3.

(1) Touch is a judgment based on the sense when looking for a bowl.

(2) The durability is shown as the number of times until the puncture was carried out on the bowl having a pressure of 0.6 kg / cm 2 under the same conditions as in the case of volleyball bowl.

6kg/㎝의 보올을 배구보올의 경우와 같은 조건으로서 바운드 시켰을 때의 상한설 높이이다.(3) Bound height is pressure resistance 0

Upper limit height when 6 kg / cm bowls are bound on the same conditions as volleyball bowls.

Example 4

Regarding the basketball ball 7, an embodiment of the present invention will be described. In other words, a nylon filament twisted yarn (70 denier two strands) and a urethane elastic yarn (strength 1.35g / denier, cutting elongation 510%) were wound on the surface of the gas-filled tubing made of 230mm diameter at the same time. Forming and vulcanizing the rubber for superimposition on it, and then applying rubber-based adhesive on it, the basketball balls No. 13 to 16 made by attaching natural leather or synthetic leather with 1 mm wrinkles on the surface, and the conventional products for comparison Performance results are shown in the fourth table. In addition, the precautions of the determination condition regarding each result are the same as (1)-(3) in the case of the football extrapolation in Example 3. FIG.

Example 5

In Example 5, the volleyball bowl of size 5 made by using a rubber yarn as the elastic yarn of the reinforcement layer is described.

Nylon 66 filament yarn (cutting strength 550g, cutting elongation 30%) and latex rubber (cutting strength 380kg / ㎠, cutting elongation 880%) , 500% modulus of 45kg / ㎠) and the three layers of nylon crimping machine in addition to the nylon yarn and rubber yarn are wound together and molded and superimposed on the overlapping rubber of the natural rubber compound, respectively, and the adhesive is applied to it. The performance results of Volleyball Balls Nos. 17 to 20 made of leather or synthetic leather and the prior art family for comparison are shown in the fifth table.

In addition, the precautions of the determination condition regarding each result are the same as that of Example 1.

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

Claims (1)

A reinforcing layer wound as a thread formed by winding a reinforcing filament yarn and an elastic yarn on the surface of a rubber-enclosed tubing made of a rubber gas, and an overlapping rubber layer formed by molding vulcanization on the surface of the reinforcing layer wound as a thread, and A gas-sealed bowl having a skin layer made of natural or synthetic leather that is adhesively coated by interposing an adhesive layer on the surface of the superposed rubber layer.

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