JPS6321078A - Method for reinforcing shuttle cock - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for strengthening a shuttlecock used in badminton, and more specifically, the present invention relates to a method for strengthening a shuttlecock used in badminton, and more specifically, the present invention relates to a method for strengthening a shuttlecock used in badminton. This invention relates to a method for strengthening a shuttle cock to improve the durability of the shuttle part made of waterfowl or land bird feathers that forms the cock.

[Conventional technology]

A shuttlecock used in badminton has a configuration as shown in FIG. That is, 14~
Sixteen waterfowl and land bird feathers 2 are arranged in a ring shape with the shaft portion 2a as the base, and the upper end side of the feather portion 2b is expanded into a substantially bell shape. Tie it with 5.8-
A shuttle part 1 having a length of 6.8 ann and a length of 6.4 to 7.0 CI11 is formed, and the shaft part 2a of the shuttle part is formed into a hemispherical shape (with a diameter of 2.5 to 2.8 cm) as a striking head 8B.
), and the cork 4 and the stem 2b are planted with adhesive by painting the part and fixing the cork 4 and the stem 2a with vinyl tape 5.

In this way, the dimensions, materials, etc. of shuttlecocks are regulated, but the weight and flight distance of shuttlecocks as official balls are also strictly regulated. When a normal player makes a full swing with an underhand stroke from the back boundary line and the flight distance or velocity is within the range of 73g to 5.50g, the ball is 0.53m in front of the bank boundary line of the opponent's court. It is required that the fall be between ~0.99m.

By the way, by hitting the shuttlecock with a racket, it rotates with the hitting head leading the way, thereby providing stability in the direction of travel, and when the shuttlecock loses speed, the shuttle part expands and increases air resistance. It falls on a completely different trajectory than a tennis ball. An important point in the fun of badminton is the way the shuttlecock flies.

Therefore, since the shuttlecock must maintain its flight trajectory, it is always manufactured under strict control.

However, the main materials that make up the shuttlecock are:
As mentioned above, they are made from feathers from waterfowl and land and islands, and cork, and because they are all natural materials, their weight varies widely and their quality is inconsistent, causing many defective products.

Additionally, shuttlecocks constructed from the above materials during games or practices are extremely fragile, with the feathers of the shuttle part being torn to pieces or the shaft breaking, making them unusable and requiring frequent replacement of shuttlecocks. It was a sport. The reality is that most of the cost of playing badminton is spent on the shuttlecock.

Therefore, today, it has been proposed that the shuttle portion is made of synthetic resin. For example, a structure has been proposed in which a resin composition of polyolefin resin such as polyamide resin, polyethylene, or polypropylene is molded using an extruder and the resin is crosslinked. This has the advantage that since it uses polyamide resin, it can provide a shuttlecock with excellent durability.

[Problem that the invention seeks to solve]

However, although shuttlecocks made of synthetic resin have excellent durability, they have drawbacks such as flying too far and having a different trajectory when flying compared to natural materials, so they are not suitable for use in official games. It is only used by general players for practice purposes.

By the way, it is said that the best natural materials for shuttlecocks are feathers from waterfowl and land islands, but it is said that only one and a half shuttlecocks can be made from one bird, and raw materials are extremely scarce and expensive. It has become a thing. Moreover, shuttlecocks made of natural materials are easily broken - usually 3-4 shuttlecocks are consumed in a match (3-set match), which is a major problem for players.

Therefore, the present inventor conducted various studies on the current status of shuttle cocks as described above, and found that in shuttle cocks that use feathers from waterfowl or land and islands as the shuttle part, thin synthetic resin is used in the shuttle part. They devised a method that could be strengthened by attaching liquid No. 8, that is, to maintain and strengthen the characteristics of the blades forming the shuttle portion.

Based on this idea, we conducted an experiment on the amount of the diluted solution to coat, and found that when coating was applied in the range of 0°01g to 1g as the amount of drying per shuttlecock (fflMt), the most They discovered that it has excellent properties.

The present invention provides a shuttlecock whose flight distance and trajectory are no different from those of natural materials, and whose durability is four to five times greater than conventional products. This is an attempt to overcome the problems faced by badminton players.

[Means for solving problems]

The method for strengthening the shuttlecock of the present invention as a means for achieving the above object is to coat the shuttle part forming the shuttlecock with a diluted synthetic resin I8 solution and dry it. The synthetic resin is attached to the shuttle part in an amount of 0.01 g to 1 g after drying, and the synthetic resin is strongly bonded to the surface layer and inside of the shuttle part, thereby improving the impact strength and rigidity of the shuttle part. The structure is designed to improve durability by

Here, in the above configuration, the coating treatment with the dilute solution is usually applied to at least the shaft portion of the blade forming the shuttle portion to improve the bending strength, rigidity, and Will1 strength of the shuttle shaft portion. The durability of the material is greatly improved. However, if necessary,
It may be applied to the feather part of the shuttle part (feather) or the entire shuttle part.

In addition, the coating treatment of the diluted solution of synthetic resin was performed at 0.0
The reason why we decided to do this in the range of 1g to 1g (per shuttle cock) was because we obtained the results of experiments on the relationship between the concentration and amount of synthetic resin, the durability of the shuttlecock, and the flight trajectory. If the amount of adhesion was less than 0.01 g, the flight trajectory was almost the same as that of the natural material, but the reinforcing effect on the shuttle was small and the durability, which is the objective of the present invention, was not achieved. In addition, if the amount of adhesion is more than 1g, the weight of the shuttlecock will increase too much and the flight distance will be increased, and there will be no noticeable difference from conventional synthetic resin products. In addition, when reinforcing only the shaft of the shuttlecock with synthetic resin, the amount of synthetic resin applied after drying should be within the range of 0.01g to 1g per shuttle cock. It is preferable for the same reason.

In addition, as the synthetic resin used in the present invention, either a thermoplastic resin or a thermosetting resin can be used, and an appropriate solvent is selected depending on the type of synthetic resin, and an appropriate 4% resin solution is used. For example, thermoplastic synthetic resins include ionomer resin, issan resin, ABSm resin, ethyl cellulose mJ11, ethylene-vinyl chloride copolymer resin, ethylene-vinyl acetate copolymer resin,
Vinylidene chloride resin, vinyl chloride resin, chlorinated polyether resin, chlorinated polyethylene resin, chlorinated polypropylene resin, ketone resin, vinyl acetate resin, TPX resin,
Phenoxy resin, butyral resin, polyamide resin, polycarbonate resin, polyterpene resin, polystyrene resin, polyvinyl alcohol resin, polyvinyl ether resin, polybutylene lenticulate resin, methacrylic resin, etc. can be used, and as a synthetic rubber, styrene butadiene Rubber, polybutadiene rubber, nitrile butadiene rubber, chloroprene rubber, butyl rubber, polyurethane rubber, silicone rubber, acrylic rubber, epichlorohydrin rubber, chlorosulfonated polyethylene rubber,
Propylene oxide rubber, propylene sulfide rubber, etc. can be used. In addition to the above synthetic resins and synthetic rubbers, derivative resins of these or the above resins may be used alone or in combination of two or more.

Typical organic solvents for dissolving these synthetic resins include methanol, ethanol, toluene, acetone, methyl ethyl ketone, tetrahydrofuran, carbon tetrachloride, and methyl cellosolve acetate.

In addition, as the thermosetting resin, phenol resin, epoxy resin, unsaturated polyester resin, alkyd resin, epoxy resin, diallyl phthalate resin, polyurethane resin, and polyfunctional acrylic resin can be used, and the thermosetting resin is solvent-free. Alternatively, it can be used after being diluted with the above organic solvent to an appropriate concentration. Further, the above thermoplastic resin and thermosetting resin may be used in combination. However, the curing temperature of the thermosetting resin used in the present invention is 100° C. or lower. Thermosetting resins that require a curing temperature of 100° C. or higher are not preferred because deterioration of the blade progresses during curing. Furthermore, in the present invention, photocurable acrylic resins and acrylic resin derivatives can also be used.

[Effect]

When coating the entire shuttle part of the shuttlecock with synthetic resin, in terms of -m, the process of coating the shuttle part of the shuttlecock with synthetic resin is as follows:
by spray coating or other means, and
For coating the shaft and feathers of the shuttle part, screen printing, brush painting, coating using a fixed-dose dispensing machine, etc. are used. That is, a synthetic resin coating may be formed on the shuttle portion.

Further, the coating treatment may be applied to each blade before assembling the shuttle portion of the shuttlecock, or may be applied after the shuttlecock is assembled. Any of the above methods can be selected for convenience. In other words, the shuttle cock itself, which is made of natural materials currently in use,
A coating treatment may be applied to strengthen the blade, or it may be applied to each blade before the shuttlecock is manufactured to form the shuttlecock.

The shuttlecock obtained by implementing the present invention has the same flight distance and flight trajectory as a shuttlecock made only from natural materials, and is completely the same as a certified ball. It has been found that the durability is 4 to 5 times longer than that of conventional products6.For example, when the shuttlecock according to the present invention is used in a game, one shuttlecock can last 1 to 2 games of 3 cent matches. was completed. In addition, the shuttlecock after the game could be used as a practice method for basic training.

By the way, as mentioned above, when manufacturing shuttle cocks using natural feathers from waterfowl or land and islands, paint is applied between the shaft of the shuttle and the cork that serves as the striking head. This is for adhesively fixing the shuttle part and the striking head and for fixing the arrangement of the blades that make up the shuttle part, and is not intended to strengthen the shuttle part of the shuttle cock. Unlike the treatment, the present invention is completely different in that the shuttle cock, etc., which has undergone the treatment is also designed to strengthen the shuttle portion.

〔Example〕

Hereinafter, in order to explain the present invention more specifically, the present invention will be described using examples. Before that, the portions where a dilute solution of synthetic resin is coated will be described with reference to the drawings.

Here, FIG. 1 is a perspective view of the shuttlecock, and FIG. 2 is a plan view of the vanes forming the shuttle portion of the shuttlecock.

That is, the entire shuttle portion 1 may be coated, or the shaft portion 2a of the blade 2 forming the shuttle portion 1 may be coated.
Alternatively, it is applied to any part of the feather portion 2b.

Example 1 - 50 g of butyral resin powder (trade name, S-LEC, manufactured by Miki Kagaku Co., Ltd.) was dissolved in 950 g of a mixed solvent of isopropyl alcohol and methyl cellosolve at a ratio of 1:1 (weight ratio), and the non-volatile content was 5%. A resin solution was prepared. Dip the official shuttlecock ball into the resin liquid from the tip of the shuttle part (feather $1K) until the liquid level is just above the tip, keep it in that state for about 2 seconds, and then immerse it in the resin liquid. The shuttlecock was removed from the resin solution, allowed to dry at room temperature for approximately 8 hours, and then weighed. The results are shown in Table 1. The synthetic resin coating attached to the shuttle portion had a thickness of about 5 to 10 microns.

Table 1 And as shown in Table 1, the weight is the standard value (4,
73g to 5.50g).

As a result of test hitting six coated shuttlecocks, all six had the same flight distance and trajectory as the untreated officially licensed balls.

Next, in order to examine durability, a match was held using coated shuttlecocks 1 and 6 to see how many cents they could withstand. For comparison with the shuttlecock of this example, a similar test was conducted using two untreated public L2 balls, and Table 2 shows the results.

From these results, it was found that the coated shuttlecock was 4 to 5 times more durable.

Example 2 - Polyamide resin powder (trade name, Tomide 1310,
A resin liquid with a non-volatile content of 5% was prepared by dissolving 50 g of Fuji Kasei (manufactured by Fuji Kasei) in 950 g of a mixed solvent of 1:1 (ffi ratio) of toluene and impropatul, and coating was performed using the resin liquid. After that, incubate at room temperature for 1 hour at 40°C.
It was dried for 1 hour. The amount of resin deposited was as shown in Table 3, and none exceeded the standard weight.

Table 3 Next, the durability of these samples was examined in the same manner as in Example 1, and the results are shown in Table 4.Table 4 Also, as shown in Table 4, the durability of the untreated shuttle・
It had more than five times the durability compared to cocks.

Example 3 - Ethylene-vinyl acetate resin? 8Wi (product name, Oritank, manufactured by Orion Kasei) with toluene to 7% non-volatile content.
After coating was performed using the resin solution, drying was performed at room temperature for 1 hour and at 40° C. for 1 hour. The amount of resin adhered to the glossy portion was as shown in Table 5, and none exceeded the standard weight.

Table 5 Next, the durability of these samples is shown in Example 1.
The results are shown in Table 6.

Table 6 Also, as shown in Table 6, the durability of the untreated shuttle
It had more than five times the durability compared to cocks.

Example 4 A solution of 3BH (trade name: LB-310, manufactured by Shoei Chemical Industry Co., Ltd.) was prepared with water to a resin liquid having a non-volatile content of 10%, and the shuttle portion was coated with the resin liquid. Note that drying was performed at room temperature for 1 hour and at 40° C. for 1 hour. The amount of resin deposited was as shown in Table 7, and none exceeded the standard weight.

Next, the durability of these samples was examined in the same manner as in Example 1, and the results were as shown in Table 7.

Table 7 Also, as shown in Table 8, the durability of untreated shuttles and
It had more than five times the durability compared to cocks.

Table 8 - Example 5 - 100 parts by weight of the resin liquid to be coated only on the shaft of the shuttle cock blade was 100 parts by weight of Araldye) AWI06 (epoxy resin manufactured by Ciba Geigy Japan) and hardener HV953U (hardener manufactured by Ciba Geigy Japan). )70
Weigh parts by weight into a container, mix until homogeneous, and use a spatula to coat the blade shaft with the resin liquid,
The epoxy resin was cured by being left at room temperature for 8 hours.

As shown in Tables 9 and 10, the weight and durability of the shuttlecock according to this example was superior to those of untreated shuttlecocks in Tables 9 and 10.

By the way, in this embodiment, in principle, when coating the entire shuttle portion 1 with a dilute solution of synthetic resin, the shaft portion 2a and feather portion 2b of the shuttle portion 1 are coated with a dilute solution of the same type of synthetic resin. is used, but a different type may be used.

It should be noted that the method for reinforcing a shuttlecock according to the present invention is not limited to the above-described embodiments, but it is clear that modifications can be made without departing from the gist of the present invention.

(Effects of the Invention) As is clear from the above description, the shuttlecock obtained by implementing the present invention has the same flight distance and flight trajectory as conventional shuttlecocks made of natural materials, and is also durable. The shuttle cock strengthening method of the present invention can solve the problems of many badminton players, and also make effective use of the feathers of waterfowl and land islands where resources are scarce. This has the effect of being able to provide shuttles and shuttles that can be easily used.

Further, according to the method for strengthening a shuttlecock of the present invention,
This has the effect of increasing the frequency of use of shuttle cocks made of natural materials not only in official matches in badminton competitions but also for practice purposes.

Therefore, by implementing the present invention, the effect of increasing the number of badminton enthusiasts can be expected.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the shuttlecock, and FIG. 2 is a plan view of the vanes forming the shuttle portion of the shuttlecock. ■... Shuttle part, 2... Feather, 2a... Shaft of the feather, 2b... Feather part of the feather, 3... Front thread, 4...
・Cork as a hitting head, 5...vinyl tape

Claims (4)

[Claims] (1) By coating the shuttle part that forms the shuttle cock with a dilute solution of synthetic resin and drying it, the synthetic resin is coated on the shuttle part with a dry weight of 0.
A method for reinforcing a shuttlecock, characterized in that the amount of adhesion is in the range of 0.01 g to 1 g. (2) The method for strengthening a shuttlecock according to claim 1, wherein at least the shaft portion of the blade forming the shuttle portion is coated with a dilute solution of a synthetic resin. (3) A method for reinforcing a shuttlecock according to claim 1 or 2, in which a resin liquid obtained by dissolving a thermoplastic resin having a molecular weight of 1000 or more in an organic solvent is used as the synthetic resin. (4) The method for reinforcing a shuttlecock according to claim 1 or 2, in which the synthetic resin is a thermosetting resin that hardens at room temperature or at a low temperature of 100° C. or lower.