JPH0793960B2 - Sand for repair - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair sand for repairing a divot such as a golf course green, fairway or tee ground, or a damaged or bald portion of a lawn or a ball mark. is there.

[0002]

2. Description of the Related Art Taking a golf course as an example, the ball hits vigorously on the green to form a dent (ball mark), and on the fairway, the turf is taken by hammering the iron and the grass is scraped off by duffing. Get drunk. Further, in the tee ground, brown soil is often exposed due to the grass being dug up by spikes, the grass being scraped off by the driver's duffing, and the like. Not only are these unsightly in appearance, but they can cause the lawn to die if left unattended.
Cause significant problems.

Therefore, every time a damage occurs on the lawn, a caddy or other related person puts sand into the sand every time it is damaged, and now the sand for repair is brown river sand or sand. I often sow mountain sand. This will regenerate the lawn and bring back the beautiful greens, fairways or tees, but when repairing with brown sand, brown spots will appear everywhere on the fairway, making the golf course landscape noticeable. There is a problem of damage.

As a condition for growing lawns, it is necessary that the soil on which the lawn is planted has a high water absorption rate and is excellent in drainage. However, the river sand and mountain sand have a water absorption rate of 20.
%, Which is excellent in drainage but lacks water retention,
It was not always the optimum repair material. vice versa,
Although there is an example in which zeolite is used as a repair sand, the zeolite has a high water absorption rate of 50%, but it has a problem that it swells due to water absorption, becomes a mud, and clogs the soil, resulting in poor drainage.

Besides, as described above, in order to prevent the natural river sand or mountain sand of earth color from being exposed and impairing the appearance of the golf course, a spray of green paint is also used. However, there was a problem that the paint easily fell off due to rain or water sprinkling, and the paint was contaminated by mixing with the groundwater. In addition, since the coloring was a single green color and had only one lightness, it was not possible to match the color tone of the repair sand with that of the lawn, and even if a green repair sand was used, There was also a problem that the place was conspicuous and the appearance was spoiled. In addition, river sand and mountain sand have sharp edges, which may damage the club head when the head of the club is driven into the repair area, and when cleanly sprinkled, the putter line is disturbed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional example, and satisfies the conditions of turf formation and growth such as contradictory water absorption rate and water permeability (good drainage) and is driven into a repaired place. It does not damage the broken club head or disturb the putter line, and it is easy to get into the root of the lawn and is effective for growing the lawn. It is a problem to be solved by the present invention to provide a versatile repair sand that can be easily adapted to the color tone.

[0007]

[Means for Solving the Problems] Repair sand of the present invention
(A) is a hollow sand grain having a hollow void (2) inside and an opening (3) opening to the surface from the hollow void (2) as shown in claim 1 for solving the above-mentioned problems. Body (1),
It is characterized in that it is composed of a water resistant coating layer (4) formed on the surface of the hollow sand granules (1). This makes it possible to satisfy the contradictory conditions for turf growth, such as water absorption and water permeability, and to greatly reduce peeling of the colored paint.

In addition to claim 1, in claim 2, the water resistant coating layer (4) has a green color and a plurality of types having different lightness and / or saturation are prepared. This is a feature of the repair sand.
You can easily match the color tone of (A) with the color tone of the lawn.

Further, according to a third aspect, the present invention is characterized in that it is a granular body having a particle size of 0.1 to 2 mm, which allows the club to be hit on the repairing sand (A) with a club. There is no such thing as damaging the head,
Also, the green does not disturb the putt line.
In addition, the particle size is such that it easily enters the base of the grass,
It is also effective in raising grass.

[0010]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a cross-sectional view of a repairing sand (A) according to the present invention, in which a hollow sand particle (1) has a hollow void (2) inside, and an opening (opening from the hollow void (2) to the surface ( Have 3). There are also many small pinholes (5). The material in this embodiment is a ceramic _{(Si0 2 -Al 2 0 3)} , it is spherical granules of about 0.3 to 1.2 mm. Water absorption is 35-65% (usually around 50%)
The permeability coefficient is 3.99 × 10 minus the square (cm / sec.).
Is. The pH is around 7.

A green water resistant coating layer (4) is formed on the surface of the hollow sand granules (1), and a plurality of types having different lightness and / or saturation are prepared. The water-resistant coating layer (4) is usually formed by baking coating, but it is not limited to this, for example, it is also possible to impart water resistance to the colored coating layer (4) with a water-resistant polymer such as polyvinyl alcohol (PVA). Is. As the color pigment, for example, a phthalocyanine pigment or the like is used. PVA functions as a binder similar to vinyl acetate and acrylic polymers when placed in a colored paint. High temperature steam is used to dissolve PVA, and the coating layer (4) mixed with PVA is dried at 100 ° C or lower. Water resistance can be imparted to the coating layer (4) only by making it. Regarding the color, in the embodiment, six colors having different lightness are prepared based on the two colors of bent turf and Koryo turf, and these are mixed on site to prepare the most suitable color. Of course, in addition to those with different lightness, prepare yellow-green or dark-green ones, or those with different saturation, and mix a lot of yellow-green type with high saturation from spring to early summer. The color of the repair sand may be adapted to the fresh green, or the dark green color may be added in the summer to match the dark green color, and the brown color scheme may change to brown when the lawn color changes to brown. You may try to increase. In this way, the color of the surrounding lawn is adapted to make the repair place as inconspicuous as possible.

Explaining the method for manufacturing the repair sand (A) of this embodiment, the refractory clay selected is dissolved in water to form a slurry,
This is heated by a spray dryer and foam-granulated to obtain the above-mentioned porous granules (1). Next, it is put into a rotary kiln and the porous granules (1) are fired at a high temperature to form white ceramics. Since the particle size is widely distributed at this stage, it is sieved in the next step to obtain a particle size of about 0.1 to 2 mm (usually 0.3 to 1.2 mm). After adjusting the particle size to some extent by sieving, put the white ceramicized porous granules (1) in the double cone type mixer, spray the paint containing the green coloring pigment, and granulate the granules.
(1) Apply evenly on the surface. After that, put the colored granules (1) into the rotary dryer,
Bake to dry. As a result, a strong and water resistant baking coating layer (4) is formed on the surface of the granules (1).

In this embodiment, as the colored coating material, a colored pigment, vinyl acetate or acrylic emulsion, and a dispersant are mixed to prepare an aqueous solution. Further, although the case where the green pigment is used has been mainly described in the present embodiment, of course, the present invention is not limited to this, and various colors are used when used for decorative horticultural soil or sand painting material.

The method of using the repair sand (A) of the present invention is as described above, but when it is put in a damaged portion of the lawn of a golf course, the hollow void (2) of the repair sand (A) retains water. It works and shows a high water absorption rate of about 50%. Moreover, granules
Since (1) is made of ceramics, when it is absorbed in the hollow void (2), it does not absorb any more water and the excess water flows down. Therefore, although it exhibits high water retention, it exhibits excellent water permeability. This creates the best soil environment for the lawn. Moreover, since it is made of ceramics as described above, it does not lose its shape even when the water retention rate is high, and the soil is not clogged. Further, as described above, various repair sands (A) having different shades can be mixed and used according to the color tone of the turf at the repaired portion, and the repaired portion can be easily made inconspicuous.

Further, since the coating layer (4) on the surface is water resistant by baking or other method, even if it is sprayed on the damaged part of the lawn, the paint will not come off due to rain water or water spray, and It does not easily fade even when exposed to sunlight, and not only does it have excellent weather resistance, but it also does not damage the environment because the paint does not soak into groundwater and cause water pollution. Furthermore, since the high temperature baking is carried out at the time of production, the germs and seeds of weeds are completely killed, and even if it is sprinkled as it is, weeds do not grow and pests do not damage the lawn. In addition, since the grain shape is spherical, the club head is not damaged even if the club is hit on the repairing sand (A), and the putting line is not disturbed on the green. In addition, the particle size is such that it easily penetrates into the base of the grass, which is effective for growing the grass.

[0016]

EFFECTS OF THE INVENTION According to the present invention, since the hollow sand granules have the hollow voids inside and the openings that open from the hollow voids to the surface, necessary moisture is absorbed in the internal voids,
Since unnecessary unnecessary water will flow away, there is an advantage that it is possible to satisfy the lawn growing conditions of contradictory water absorption rate and water permeability (good drainage), and furthermore, the surface of the hollow sand granules is colored. Since the water-resistant coating layer is formed, unlike the conventional spray coating, it does not run down, and it is possible to maintain a beautiful color that matches the surroundings for a long period of time.

Furthermore, since the color of the colored water-resistant coating layer is green, and a plurality of types having different lightness and / or saturation are prepared, those having different lightness and / or saturation and green color are provided. The color tone of the repairing sand can be easily matched to the color tone of the repaired area by mixing the appropriate ones, and even if the repairing sand is used, it does not give a feeling of strangeness.

Further, since the repairing sand has a particle size of 0.1 to 2 mm, the club head is granular because the repairing sand sprinkled on the repairing spot is also granular. It doesn't hurt, and on the green, it doesn't disturb the putting line. In addition, the particle size is such that it easily penetrates into the root of the grass, which is advantageous for growing grass.

[Brief description of drawings]

FIG. 1 is a sectional view of a repairing sand according to the present invention.

[Explanation of symbols]

 (A)… Repair sand (1)… Granules (2)… Hollow voids (3)… Openings (4)… Water resistant coating layer

Claims (3)

[Claims] 1. A hollow sand granule having a hollow space inside and an opening opening from the hollow space to the surface, and a colored waterproof coating layer formed on the surface of the hollow sand granule. Repair sand that is characterized by things. 2. The color of the water resistant coating is greenish,
In addition, the repair sand according to claim 1, wherein a plurality of types having different lightness and / or saturation are prepared. 3. The repair sand according to claim 1, which is a granular material having a particle size of 0.1 to 2 mm.