JPS5857193B2 - Goldenrod Grip Tape - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grip tape for metal bats.

In recent years, metal bats have become widely used in place of wooden bats due to their superior durability, rebound strength, and the like.

Even metal bats with such excellent features have a smooth and hard surface on the grip, which makes them slippery when you grip them, especially when your hands are sweaty or in the rain. It is extremely dangerous to fly in any direction.

Also, the impact when hitting the ball is greater than that of a wooden bat, and combined with the slippery nature of the bat, the grip becomes loose and concentration at the time of impact is impaired.

Therefore, the grip part needs to be devised to prevent slipping and to cushion the impact, and various methods have been tried.

The most common methods for the current amount are to fit a cylindrical piece of vulcanized rubber with a roughened surface into the grip part and fix it with adhesive, or to use a cylindrical piece with a surface that is also integrally molded with the convex part of the grip end. There is a method of fitting rough vulcanized rubber and fixing it with adhesive.

However, although such a cylindrical vulcanized rubber grip satisfies the ability to absorb impact when hitting a ball, it hardly improves slipperiness.

Another drawback is that vulcanized rubber grips are very difficult to install.

That is, since the diameter of the convex portion of the grip end is considerably larger than the diameter of the grip portion, the vulcanized rubber grip cannot be inserted unless it is expanded to the diameter of the grip end.

For example, one end of the vulcanized rubber grip is sealed, and compressed air is fed from the other end to expand and insert the vulcanized rubber grip.

Such a method requires specialized equipment and operational skill, and it is not easy to replace the vulcanized rubber grip when it is damaged.

Other attempts have been made to use wire tape and leather tape, but cotton tape does not absorb enough shock, and leather tape also has drawbacks such as being slippery in rainy weather.

The present invention aims to eliminate the drawbacks of the conventional metal bat grips, and it is an object of the present invention to easily form a metal bat grip that does not slip even in rainy weather and can satisfactorily absorb impact when hitting a ball. The purpose of this invention is to provide a grip tape that makes it possible to

Therefore, the gist of the present invention, which is distantly related to this object, is that by filling the weave space of a plain woven fabric with rubber, one surface of the plain woven fabric is filled with rubber while leaving the uneven state of the woven fabric. a rubber-filled woven fabric layer providing a coated gripping surface;
Laminated and integrated on the other surface of this rubber-filled woven fabric layer,
The tape is wound around a metal bat and consists of a lower rubber layer that provides a surface, and the plain woven fabric is bias-cut at an angle of 30 to 60 degrees with respect to the longitudinal direction of the tape. Grip tape for metal bats is characterized by:

An example of the method for manufacturing the grip tape for metal bats according to the present invention is as follows.

(1) Rotate the middle roll of an upright three-roll calender roll machine quickly and the upper and lower rolls slowly, insert a rubber compound between the upper and middle rolls, wrap it around the middle roll, and - A plain woven fabric (hereinafter simply referred to as woven fabric) is inserted between the lower rolls, and the rubber compound is rubbed into the woven fabric using the rotation ratio of each roll.

This fills the spaces between the weaves with rubber and at the same time provides a thin rubber coating that leaves the surface of the woven fabric uneven.

(2) A rubber sheet is wrapped between the upper and middle rolls of a calendar roll machine, which consists of upper, middle, and lower rolls with the same rotational speed, and the middle and lower rolls are filled and covered with the above rubber. Insert the woven fabric.

As a result, the rubber sheet and the woven fabric are pressed together, and the lower rubber layer is laminated and integrated with the woven fabric.

(3) This laminate of lower rubber layers is steam vulcanized in a vulcanizer.

In the case of unvulcanized and non-vulcanized metal bat grip tapes, this vulcanization operation is omitted.

(4) The laminated layer of the rubber-filled woven fabric layer and the lower rubber layer is cut into a predetermined tape width using a bias cutter at an angle of 30 to 60 degrees with respect to the length of the woven fabric.

(5) If necessary, the cut tape may be wrapped around a metal bat by applying an adhesive to the surface of the rubber layer for adhesion, or by bonding with double-sided adhesive tape.

The grip tape for metal bats of the present invention is obtained by laminating woven fabric and rubber and integrally molding them.

The rubber filled in the woven fabric used in the present invention and the lower rubber layer may be vulcanized, unvulcanized, or non-vulcanized in the product state.

The effect of the rubber-filled woven fabric layer on the surface is that on the one hand, the wrap around the metal bat is glued and provides a gripping surface; on the other hand, the unevenness created by the uneven texture of the woven fabric prevents slipping; Since the fibers are filled and coated with rubber to the extent that their unevenness can be maintained, the fibers are reinforced and prevented from fraying and abrasion, and because they are laminated and integrated with the underlying rubber layer, they do not peel off. These effects are exerted over a long period of time without any problems.

Also, the weave angle of the woven fabric is 30 to 6 with respect to the length direction of the tape.
The advantage of the 0° angle is that it provides the appropriate amount of elongation necessary for tape wrapping, making it possible to securely tighten the tape, and that the fibers on the side edges of the grip tape do not fray, making it easier to wrap the tape. For example, it can be wrapped while the sides are in precise contact with each other.

In addition, the effect of the lower layer rubber is that the elongation of the rubber is suppressed by the upper fiber layer, so relatively soft rubber with a hardness of 20 to 50 can be used, which is more effective in absorbing shock. .

In addition to the above-mentioned effects, another effect of the metal bat grip tape of the present invention is ease of installation.

In other words, this grip tape can be easily operated by simply wrapping the tape around the grip portion in a spiral manner while keeping the side edges of the tape in contact with each other without any gaps through the adhesive.
Grips can now be easily replaced, which was previously difficult.

Example 1 A cotton fabric 4 constituting a rubber-filled woven fabric layer filled with 0.2 kg of unvulcanized rubber per m2 was prepared with a lower rubber layer so that the weave of the cotton fabric 4 was at an angle of 37° to the longitudinal direction of the tape. Laminated on unvulcanized rubber layer 3 which forms a layer, this is vulcanized at 150°C, adhesive 6 is applied to the back side, width 30 mm, length 900 m
It was cut into a tape shape of m.

As a result of conducting an abrasion strength test on the surface and the surface of the side edges of the tape, no abrasion or fraying of the surface was observed in either case.

On the other hand, a cotton fabric not filled with rubber was laminated on the unvulcanized rubber layer so that the weave was at 90° to the direction of the tape, treated in the same manner as above, and subjected to a surface abrasion strength test. A portion of the tape was worn away, and the side edges of the tape became frayed and destroyed.

Further, a cotton fabric 4 filled with 0.2 kg of unvulcanized rubber per m2 was laminated on the unvulcanized rubber layer so that the weave was 90' with respect to the tape length direction, and treated in the same manner as described above to determine its surface abrasion strength. As a result of the test, no surface abrasion was observed, but fraying of the weave was observed on the side edges of the tape.

Example 2 A 0.5 inch thick cotton fabric 4 made of a rubber compound based on polyisoprene (commercially available products are Opanol or Vistanex) without the addition of a vulcanizing agent or a vulcanization accelerator, and pasted by friction operation. One side of the woven fabric was coated and filled to a thickness of 0.6 mm, and the other side of the woven fabric was topped with the same rubber compound to a total thickness of 1.2 m.
It was covered with a rubber layer so as to have a thickness of m.

This woven fabric was cut to a length of 900 mm and a width of 30 mm using a bias cutter.

When a chloroprene rubber adhesive was applied to the surface of the rubber layer and used by wrapping it around a metal baseball bat, there was no slippage due to the unevenness of the rubber and woven fabric, and the effect was sufficient. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the grip tape of the present invention wrapped around the grip portion of a metal bat, Fig. 2 is a partially enlarged sectional view thereof, and Fig. 3 is an enlarged sectional view of the tape. . 1...Metal bat, 2...Grip end, 3...Lower rubber layer (unvulcanized rubber layer),
4...Rubber-filled woven fabric layer (cotton fabric), 5...
...Grip tape joint, 6...Adhesive.

Claims (1)

[Claims] 1. A rubber-filled woven fabric layer that provides a grip surface covered with rubber by leaving the uneven state of the woven fabric on one surface by filling the weave spaces of the plain-woven fabric with rubber, and this rubber-filled woven fabric layer. The tape is composed of a lower rubber layer that is laminated and integrated on the other surface of the woven fabric layer to provide a surface for wrapping around a metal bat, and the plain woven fabric is laminated in the longitudinal direction of the tape. A grip tape for a metal bat, characterized in that it is bias cut at an angle of 30 to 60'.