JPS6039362B2 - Method for manufacturing a seat equipped with a gripping attachment such as a ball - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to improvements in members that come into contact with a ball, such as upper members of athletic shoes for ball games and ball-catching trolley members for baseball. The present invention relates to a method of manufacturing a seat equipped with a gripping attachment such as a ball.

Conventional upper members of athletic shoes for ball games and ball-catching leather for baseball are mainly made of natural leather, so-called artificial (or synthetic) leather, etc., and have a large number of concave or convex portions on the outer surface of the sheet that can grip the ball. In order to form a Rubber or a core plate with small protrusions at the intersection of the two is sandwiched, or a sheet with many through holes is used as the top plate, and a rubber or synthetic resin with many protrusions between it and the inner plate. A bracket has been provided in which a core plate of the parenthesis is sandwiched between the braces, each protrusion of the core plate of the bracket is iron-fitted into each through hole of the front plate, and each protrusion is formed to protrude from the outer surface side. However, if the initial sheet is heated and pressurized to form the desired convex or concave portions, heating will not only damage the flexibility and texture characteristic of natural leather materials, but also only natural leather materials, etc. Repeated contact with balls etc. causes wear and tear, which tends to damage the top plate.

Next, if a core plate with a large number of protrusions is provided between the top plate and the inner plate or a core plate with small protrusions protruding from the intersection of the lattice part and the lattice is sandwiched, the flexibility will be lost by the thickness of the sandwiched core plate. Not only does this weaken the sense of contact with the ball, making it difficult to fully grasp and control the ball, but also the raised parts of the top plate, such as small protrusions pressed by small protrusions, may come into repeated contact with the ball, etc. It is worn out by friction, and the ball gripping part is likely to be damaged from this worn part. Furthermore, a core plate with a large number of protrusions is provided between a top plate with a large number of through holes and a core plate. If the core plate is made to protrude toward the outer surface, the core plate will similarly lose its flexibility due to the thickness of the core plate, and the feeling of contact with the ball will be dulled, making it difficult to fully grasp and control the ball, etc. First, there were defects such as sand and the like entering between each through hole and each protrusion, etc., and the top plate being easily damaged from the hole green etc. of each through hole where sand entered. The sheet equipped with a gripping attachment such as a ball according to the manufacturing method of the present invention is produced by surface-treating the polyurethane leather on the surface of the sheet of so-called artificial (or synthetic) leather with a solvent, or by treating the surface of the polyurethane leather with a solvent, or by treating the surface of the sheet with a polyurethane film and a liquid urethane prepolymer compound. A polyurethane adhesive with good bonding properties is applied, and after drying, a liquid polyurethane compound is poured into each hole of the sheet material of the non-adhesive material on the sheet, and this pour filling is performed. A liquid polyurethane compound is cured to form a large number of small protrusions of PoIJ urethane elastomer integrally bonded to the polyurethane film at predetermined locations in the polyurethane film on the surface of the artificial leather sheet. By using this sheet with a ball-gripping attachment, which has a large number of polyurethane elastomer small protrusions formed at predetermined locations, as a ball-catching surface for baseball, or as a cover or toe cover for athletic shoes mainly used for ball games. The present invention has been able to contribute to the provision of ball-catching odor for baseball (eg, gloves, catcher's mitts, etc.) or athletic shoes for ball games (eg, soccer shoes, etc.), which have an effective ball gripping function. The structure of the seat equipped with a gripping attachment such as a ball according to the present invention will be described below with reference to the drawings.

First, the manufacturing method of sheet A equipped with gripping attachment methods for balls, etc. of the present invention is as shown in FIG. So-called artificial (or synthetic) leather sheet material b, in which a polyurethane coating 2 is formed on the upper surface of the main body 1, which has been fluffed by brushing or fuzzing the removed part or the leather material of natural leather, etc. Next, a liquid urethane prepolymer that becomes a polyurethane elastomer that has good adhesion to the polyurethane film or polyurethane adhesive on the surface of the artificial leather sheet material b, and also has excellent ball gripping, dust resistance, and strong balling properties. 1'' polymer compound c, and then, as shown in FIG.
Prepare a sheet d on a thin plate with perforations.

Next, as shown in FIGS. 1 and 3D, the surface of the polyurethane film 2 of the artificial leather sheet material b is treated with a solvent such as MEK or a thin layer of polyurethane adhesive is applied. Then dry it.

Artificial leather sheet material b that has undergone such surface treatment and dried
The non-adhesive thin plate-like sheet d is placed on top. Further, the liquid polyurethane compound c is submergedly filled into each of the small through holes 3, 3 from the upper surface side of the non-adhesive thin plate-like sheet d. At this time, the urethane prepolymer formulation c is
For example, it may be a mixture of liquid urethane prepolymer, curing agent, catalyst, and pigment melted or dissolved and mixed in as little common solvent as possible, but polyurethane that has the best workability, the best bonding properties, and the best ball gripping properties can be used. The elastomer is produced by dissolving a curing agent and a catalyst in the above two components such as acetone and a tackifier such as liquid coumaron indene resin, liquid resin ester, etc. that is compatible with the liquid urethane prepolymer in a viscous liquid. A primary hardening solution is prepared by melting it in as small a quantity as possible of a low boiling point organic solvent having properties, and a uniform secondary hardening solution is prepared by mixing the primary hardening agent solution with an appropriate amount of the tackifier. A curing agent solution is prepared, and this is left at room temperature or at a low temperature to evaporate part or all of the low boiling point organic solvent to create a tertiary curing agent solution, which is converted into a liquid urethane prepolymer. It is formed by adding and mixing. As mentioned above, each liquid polyurethane compound c poured and filled into each small through hole 3 of the non-adhesive thin plate-like sheet d on the artificial leather sheet material b reacts and hardens to form a polyurethane elastomer. It is molded into a large number of small protrusions a, a of one molded product.

At this time, since the thin plate-like sheet d is molded from non-adhesive silicone resin (or silicone rubber), the large number of small protrusions a,
Since it does not come into close contact with materials such as a, it can be removed extremely smoothly from the polyurethane coating 2 of the artificial leather sheet material b. When the thin sheet d is removed from the artificial leather sheet material b in this way, a large number of polyurethane elastomer protrusions 4 and a are provided at predetermined portions of the polyurethane coating 2 of the artificial leather sheet material b. Additionally, the sheet A can be formed with a gripping attachment such as a ball. At this time, on the surface side of the sheet A equipped with a gripping attachment such as a ball, the polyurethane coating 2 on the surface side and the many small protrusions a, a of the polyurethane elastomer have essentially good adhesion, and furthermore, the above-mentioned Because the surface of the polyurethane film 2 is pre-treated or coated with a polyurethane adhesive, these adhesive bonds are extremely strong and form an integral bond, which reduces contact friction when gripping and controlling a ball, etc. There is no risk of peeling off due to force or pressing force.

A sheet A equipped with an attachment such as a ball according to the present invention is a sheet material b made of artificial leather, as shown in FIG. 4 1 and m.
The small protrusions a, a of polyurethane bonded to the polyurethane coating 2 on the surface side of the polyurethane coating 2 are provided, and the small protrusions a, a on the polyurethane coating 2 have a cross section in the direction of the ball as shown in FIG. 4 1 and 0. It can be formed into a cylindrical shape or a trapezoidal cross section in the axial direction as shown in FIG. 4m. Furthermore, the small protrusions a, a of the polyurethane can be formed into a flat top surface as shown in FIG. If an organic solvent with a boiling point is contained, after pouring the liquid polyurethane compound containing an appropriate amount of the organic solvent with a low boiling point in a casting machine, the organic solvent with a low boiling point evaporates, resulting in It is also possible to form small protrusions a and a of polyurethane shown in m, which are thinned and have concave arc-shaped upper surfaces. The polyurethane small protrusions having concave arcuate upper surfaces are more likely to prevent slipping than polyurethane small protrusions having flat upper surfaces. The thus-obtained sheet A provided with an attachment for gripping a ball, etc., is used as the main component 4 of sports shoes for ball games, such as soccer shoes, as shown in FIG. 5 1 and B. The toe parts 5 are cut and formed, and at this time, the large number of small protrusions a, a of the polyurethane elastomer are provided on the corner parts 4 and the toe sides of the toe parts 5. It is possible to provide athletic shoes for ball games in which a ball gripping attachment is provided on the toe side, and as shown in FIG. The ball-catching surface leather parts 6 are cut and formed into six shapes, and at this time, a large number of small protrusions a, a of the polyurethane elastomer are provided mainly on the side of the ball-catching part of these ball-catching surface leather parts 6, so as to mainly grip the ball. It is also possible to provide a ball catching device for baseball in which an attachment is provided on the side of the ball catching portion. Athletic shoes for ball games in which the attachment for gripping a ball, etc. according to the present invention is formed on the toe side of the upper part, and ball catching equipment for baseball, in which the attachment for gripping a ball, etc., according to the present invention is formed on the side of the ball catching part of the ball catching surface leather. Not only does the flexibility and texture of the natural leather not be affected by heat and pressure like conventional products, but it also uses a core material of rubber or synthetic resin with many protrusions between the top plate and the inner plate. Since there is no intervention, there is less to prevent the contact between the ball, etc. and the foot of the person wearing the shoe (or the hand of the person wearing the baseball catcher), making gripping and control of the ball, etc. more sensitive. It can be used without sacrificing flexibility.

In addition, the sheet A equipped with an attachment for gripping balls, etc. according to the present invention is mainly a typical example of a sheet having gripping performance and control performance for balls, etc., but the seat A is made of artificial leather. If the material b is made of an extremely flexible material or a material with a thin wall thickness, the sheet A can be provided with an attachment for grip control such as a grip tape for a baseball bat or a golf club.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional schematic diagram of an artificial leather sheet material used in the manufacturing method of the present invention. FIG. 2 is a schematic longitudinal cross-sectional view of a part of a non-adhesive thin plate-like sheet similarly used in the manufacturing method of the present invention. FIGS. 3 1 to 3 m are illustrations of longitudinal cross-sectional diagrams showing the main steps of the manufacturing method of the present invention, in which 1 shows the state of the liquid polyurethane blend before being filled in a western stream, and n' shows the state of the liquid polyurethane blend before filling. This shows the state of the material after it has been filled in the ocean. m is a sheet provided with a gripping attachment such as a ball according to the manufacturing method of the present invention. 4. FIGS. 1 to 4m are illustrations of partially enlarged cross-sectional diagrams of polyurethane edges and protruding portions. 5 1 to rainbow are the planes of the upper parts of athletic shoes for ball games equipped with gripping attachments for balls, etc., the toe parts thereof, and the ball-catching surface leather parts of the ball-catching equipment for baseball according to the manufacturing method of the present invention. This is a schematic illustration. (Drawing code) A: Sheet with attachment, a: Small protrusions, b: Artificial leather sheet material, c: Liquid Polyurethane compound, d... Thin sheet, 1...
Base fabric, 2... Polyurethane film, 3...
4. Protrusion, 4.. Instep parts, 5.. Toe parts, 6.. Ball catching surface leather parts. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A base fabric such as a woven fabric, knitted fabric, or non-woven fabric, or a member from which the silver surface of natural leather has been removed, or a leather material of natural leather, etc., is raised or piled to make it fluffy, and then polyurethane is applied to this material. A sheet of so-called artificial (or synthetic) leather in which a resin solution is applied multiple times and the solvent in the solution is evaporated to form a polyurethane film on the base fabric, floor leather, etc.; a liquid polyurethane compound; In addition, prepare a thin plate-like sheet that is non-adhesive and has a large number of small through holes of arbitrary shapes in predetermined parts, and treat the surface of the artificial leather sheet material with a solvent such as MEK or with a polyurethane adhesive. After applying a thin layer of, drying this, placing the non-adhesive sheet on the surface-treated sheet material, and pouring the liquid polyurethane compound into each of the through holes from above the non-adhesive sheet, After filling, pouring, and curing the filled liquid polyurethane compound, the non-adhesive sheet is removed from the artificial leather sheet material, and the desired portion of the polyurethane film is coated on the surface of the artificial leather sheet material. A method for manufacturing a sheet equipped with a gripping attachment such as a ball, characterized in that a large number of arbitrarily shaped polyurethane elastomer small protrusions are formed integrally with the polyurethane coating on the sides. 2. The method for manufacturing a sheet equipped with a gripping attachment such as a ball according to claim 1, wherein the artificial leather sheet material is cut in advance into the shape of a shoe upper member. 3. Manufacture of a sheet equipped with an attachment for gripping a ball, etc. as set forth in claim 1, characterized in that the artificial leather sheet material is cut in advance into the shape of a ball-catching surface leather member of a baseball catching tool. Law. 4. Claims characterized in that the liquid polyurethane compound is a compound in which a liquid urethane prepolymer, a curing agent, a catalyst, a pigment, etc. are melted or dissolved in as small a amount of a common solvent as possible. A method for producing a sheet equipped with a gripping attachment such as a ball according to any one of items 1 to 3. 5. The liquid polyurethane formulation is prepared by adding a curing agent and a catalyst to the two, such as acetone, and a tackifier, such as liquid coumaron indene resin, liquid rhodiester, etc., which is a viscous liquid and is compatible with the liquid urethane prepolymer. A primary curing agent solution is prepared by dissolving it in a small amount of a soluble, low boiling point organic solvent, and the primary curing agent solution is mixed with an appropriate amount of the tackifier to form a uniform curing agent. Create a secondary curing agent solution,
This is left at room temperature or at a low temperature to evaporate part or all of the low boiling point organic solvent to create a tertiary curing agent solution, which is added to the liquid urethane prepolymer and mixed to obtain the desired result. Claims 1 to 3 are characterized in that a liquid urethane prepolymer formulation is prepared.
A method for manufacturing a seat equipped with a gripping attachment such as a ball according to any of the above.