JP2662597B2 - Golf club grip - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip for a golf club which has an excellent touch feeling and appearance, and has a property of not slipping even when wet with water.

2. Description of the Related Art Generally, one of the important required performances of a grip of a golf club is that it is difficult to slip.

Conventionally, leather or vulcanized rubber has been used as a material for grips of golf clubs, and leather has characteristics of good touch, appearance, luxury, and non-slip properties. Although it has excellent performance, it has a problem that it is expensive and hardens when wet with water.

For this reason, rubber grips have become quite popular these days, but they are inferior in appearance and luxury compared to leather, and are often regarded as cheap. In addition, conventional rubber grips are relatively hard to slip when dry, but become extremely slippery when wet with water, which is a serious problem when used outdoors or when the user sweats his hands. Cause defects. Further, there is a problem that the conventional rubber grip has a poor touch feeling as compared with the leather grip.

Various proposals have conventionally been made to solve such problems of the rubber grip, and for example, a method of blending cotton or the like in rubber has also been performed. However, although the slip property is improved to some extent by this method, the feeling of touch and the luxury of appearance cannot be sufficiently satisfied.

In addition, the present applicant has also proposed a low-rebound rubber composition as a material for a rubber grip that is difficult to slip (Japanese Patent Application Laid-Open No. 60-1985).
No. 81233), which can considerably improve the slipperiness and feel, but still has room for improvement in terms of temperature dependence of cubic properties such as high-grade appearance and hardness.

Therefore, a golf club grip that has the same appearance performance and feel as leather, is less slippery even when wet with water, and has good mechanical properties has been desired.

Means and Action for Solving the Problems The present inventor has conducted intensive studies in order to meet the above demand, and as a result, contains a rubber component, a filler, and a vulcanizing agent, and further has a
A vulcanizate of a rubber composition blended with a mesh leather powder, containing 5 to 65% by weight of the above leather powder and removing the skin layer on the surface so that the leather powder becomes A golf club grip, which is characterized by being exposed, has an excellent appearance and feel, is resistant to slipping even when wet, and has excellent mechanical properties such as strength and hardness, and can compete with leather. In addition to the fact that, unlike leather, there is no inconvenience that it is difficult to get wet with water, and that it can be produced at low cost, the present invention has been accomplished.

 Hereinafter, the present invention will be described in more detail.

The golf club grip according to the present invention contains 40 to 300 mesh leather powder in an amount of 5 to 65% (% by weight, the same applies hereinafter).

Such a golf club grip can be obtained by mixing leather powder with a rubber composition and vulcanizing the mixture.

Here, as the rubber composition, an ordinary rubber composition containing a rubber component, a filler, and a vulcanizing agent can be used.

In this case, one or more of natural rubber and synthetic rubber may be used as the rubber component, and as the synthetic rubber, isoprene rubber, styrene-butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, butyl rubber, modified butyl rubber , Ethylene-propylene rubber and the like can be used, but those having a glass transition temperature of -20 ° C or less are preferable.

Further, as the filler, a normal non-reinforcing or weak reinforcing filler can be used, for example, calcium carbonate, magnesium carbonate, barium carbonate, strontium carbonate, barium sulfate, calcium sulfate, dolomite, kaolin clay, calcined clay, Hard clay, sericite, talc, talc, wollastonite, bentonite, muscovite, biotite, biotite, aluminum hydroxide, zinc white, activated clay,
Examples include halosite, titanium oxide, masonry, light ash, heavy ash, diatomaceous earth, and shirasu, and one or more of these can be used. The amount of these fillers is preferably 2 to 200 parts by weight, more preferably 5 to 150 parts by weight, and particularly preferably 10 to 100 parts by weight based on 100 parts by weight of the rubber component.

Further, the vulcanizing agent is not particularly limited as long as it can be generally used for vulcanizing rubbers such as organic peroxides, sulfur and organic sulfur compounds. The compounding amount is usually 0.25 to 10 parts by weight, particularly preferably 0.5 to 5 parts by weight based on 100 parts by weight of the rubber component.

The rubber composition may further contain a softener, a plasticizer, or a vulcanization accelerator, if necessary. The type of the softening agent or the plasticizer is not particularly limited as long as it is commonly used for rubber.Examples include aromatic oils, naphthenic oils, spindle oils, polybutenes, organic acid derivatives such as dioctyl phthalate, and phosphoric acid. Derivatives such as tricresyl and inorganic acid derivatives such as sulfuric acid derivatives are exemplified. The compounding amount of these softeners or plasticizers is preferably 0 to 40 parts by weight, particularly preferably 2 to 15 parts by weight based on 100 parts by weight of the rubber component. Also,
The type of the vulcanization accelerator is not particularly limited as long as it can be generally used in rubber compositions such as aldehyde-ammonia, dithiocarbamates, guanidines, thiurams, sulfenamides, thiazoles and thioureas. The compounding amount is usually 0.25 to 10 parts by weight, preferably 0.5 to 5 parts by weight based on 100 parts by weight of the rubber component. In the rubber composition, other additives such as a reinforcing agent such as carbon black and silica, a wax for preventing deterioration, an antioxidant, and the like can be appropriately compounded according to the purpose and application.

The kind of the leather powder used in the present invention is not particularly limited, but leather powder such as cow, horse, pig, and sheep can be preferably used. The particle size of this leather powder is 40 to 30 as described above.
It is 0 mesh, preferably 50-250 mesh, more preferably 70-220 mesh. If it is larger than 40 mesh, it is difficult to prepare a uniform golf club grip, and the strength and the like of the golf club grip deteriorate, and if it is smaller than 300 mesh, the feel and appearance deteriorate, and the object of the present invention cannot be achieved. .

In addition, the leather powder may be adjusted to the above-mentioned particle size by crushing or cutting the above-mentioned leather by an appropriate means. Is preferably performed under a drying condition of 4% or less. When the humidity is higher than 5% when crushing or cutting,
Since the leather powder may be entangled with each other and the leather powder may form a cotton-like structure, it is difficult to prepare a uniform golf club grip, and the obtained golf club grip is difficult to obtain. Mechanical properties such as strength may deteriorate.

The amount of the leather powder is 5 to 65%, preferably 10 to 65% of the total weight of the golf club grip.
The amount is such that it is 55%, especially 20-50%. The amount is 5
%, Appearance performance, touch feeling, and sliding properties are inferior,
If it is more than 65%, the physical properties of the golf club grip are reduced, and none of the objects of the present invention can be achieved.

The rubber composition described above can be heated and cured according to a conventional method to obtain a golf club grip. In this case, the vulcanization curing method can be performed under ordinary conditions, but the curing temperature is preferably 100 to 190 ° C. If the hardness temperature is lower than 100 ° C., it takes a long time to cure, and if it is higher than 190 ° C., the physical properties may be deteriorated.

The golf club grip of the present invention, after vulcanization molding, is subjected to a surface treatment of removing the surface skin layer by cutting, grinding, or the like, whereby the leather powder in the golf club grip is subjected to surface treatment. , The characteristics of the leather powder are effectively exhibited, and a golf club grip having the desired high-grade touch feeling and appearance and having the property of being less slippery even when wet with water can be obtained. In addition, as a surface treatment method, sandblasting, buffing, grooving, chemical treatment, or the like can be employed.

Further, the surface of the grip for a golf club can be provided with irregularities or a satin finish can be applied, thereby making it more difficult to slip.

Effect of the Invention The grip for a golf club of the present invention has an excellent touch feeling,
In addition to its appearance, it has improved slipperiness, is less slippery when wet, as well as when dry, and has excellent mechanical properties such as strength and hardness.

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

[Examples and comparative examples]

Raw materials having the following formulation were kneaded with a roll having a surface temperature of 70 ° C., and then formed into a sheet. Thereafter, this was filled in a mold, vulcanized under the conditions of a temperature of 160 ° C., a pressure of 30 kg / cm ² , and a heating time of 10 minutes, and then demolded.

Next, the surface of the obtained rubber vulcanizate was cut to remove the skin layer on the surface. It should be noted that the cutting was carried out using a 80 to 100 sandpaper and buffing the surface for 30 minutes.

Formulation Dried leather powder Amount shown in Table 1 Natural rubber (1) 70.0 parts by weight EPDM (2) 30.0 〃 Filler (3) 30.0 軟 Softener (4) 1.5 亜 鉛 Zinc white 3.0 カ ー ボ ン Carbon black (5) 4.0 1.5 1.5 Stearic acid 〃 Sulfur 1.25 〃 Vulcanization accelerator (6) 1.5 防止 Anti-aging agent (7) 2.5 〃 (1) Natural rubber: RSSN0.3 (2) EPDM: EPDD (Nippon Synthetic Rubber Co., Ltd.) (3) ) Filler: Kaolin clay (4) Softener: Naphthenic oil (5) Carbon black: HAF carbon (6) Vulcanization accelerator: Noxeller MSA (Ouchi Shinko Co., Ltd.) (7) Antioxidant: Nocrack NS -6 (Ouchi Shinko Co., Ltd.) For comparison, vulcanization was carried out in the same manner as described above using cotton powder and cork powder instead of dry leather powder.

Next, the physical properties of the rubber vulcanizates were measured, and each rubber vulcanizate was manufactured into a rubber grip for a golf club, and the slip, appearance performance, and feel upon dry and wet were evaluated by a sensory test. In this case, the hardness measurement (JIS-A) and the tensile test (JIS-3) were performed according to JIS-K6301. In addition, sliding during dry and wet conditions was evaluated in three steps, that is, non-slip, normal, and slippery, and the appearance performance and touch feeling were evaluated in three steps, good, normal, and bad, to evaluate how 100 people felt.

The results are shown in Table 1. Table 1 also shows the results of a similar test performed on a commercially available rubber grip for a golf club.

From the results shown in Table 1, it is recognized that the golf club grip of the present invention has sufficient strength and moderate hardness as a grip, is excellent in appearance performance and touch feeling, and is non-slip.

Claims (1)

(57) [Claims] (1) a rubber component, a filler, a vulcanizing agent,
It is made of a vulcanized rubber composition containing 40 to 300 mesh leather powder, contains 5 to 65% by weight of the above leather powder, and has a surface skin layer removed to remove the leather powder. A grip for a golf club, wherein the grip is exposed on the surface.