JPH0728604B2 - Colored shirasu particles - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to colored shirasu particles. More specifically, it relates to colored shirasu particles for turf cultivation and colored shirasu particles for divot of lawns, which are used for cultivating soil for gardens, landscaping, horticulture, etc., and for cultivating grass for golf courses, soccer grounds, tennis courts, etc. is there.

[0002]

2. Description of the Related Art Conventionally, river sand has been used as a soil for turf growth in order to prevent drainage and solidification of the soil. Since river sand is in high demand as a concrete aggregate, it is thin and expensive as a lawn cultivation soil, and river sand as a lawn cultivation soil has excellent water retention, retention of fertilizer components, drainage and breathability. There are difficulties.

As a plant which can be hydroponic and has been proposed for the purpose of improving the interior decoration by coloring, JP-A-59-98631 discloses that pumice, tuff and the like are crushed and dried. Heat-treated, hard, porous gravel containing a large amount of silicon dioxide, put in a container with no wastewater holes, and plants can be hydroponic without using other chemicals, A colored artificial gravel is described which is characterized by being usable for interior decoration by coloring.

As a proposal for improving the cultivation decorative soil of potted plants and the surface decorative soil for horticulture, Japanese Unexamined Patent Publication (Kokai) No. 60-141210 discloses a raw stone made of zeolite and obsidian. Is crushed into granules and heated to a temperature of about 50 to 60 ° C. to produce artificial granules having a large number of minute cavities formed on the surface or inside by heating and calcination, and the warm artificial granules are mixed with a pigment of a desired color. A method for coloring artificial granules having fine cavities, which is characterized in that the artificial granules are mixed with a resin liquid and kneaded to color the artificial granules in a desired color, is described. Further, Japanese Patent Laid-Open No. 61-31024 describes a horticultural plant culture soil colored by coating or impregnating a porous stone such as pumice or lava with a paint or a dye.

As described above, in the conventional colored horticultural plant culture soil, in order to obtain water retention and fertilizing property, many fine cavities are formed on the surface or inside by heat treatment, and a large amount of silicon dioxide is added. Although granules themselves are artificially formed by adding them, it is still impossible to artificially create something that is comparable to natural granules. Moreover, the natural sand stones that meet the purpose are rare, such as sea sand, river sand, and mountain sand used as cultivating soil for lawns.

[0006] From this point of view, since shirasu widely distributed in Kagoshima prefecture and Miyazaki prefecture is porous and rich in water retention and fertilizing property, sand for cultivating horticultural plants and lawn soil for golf courses are cultivated. It is attracting attention as, but Shirasu is about 80%
Is made of volcanic glass, and contains ores such as feldspar, pyroxene, and quartz, and pumice. Since all of them are porous and lightweight, some of them float on the water, which is different from the heavy sand such as sea sand, river sand, and mountain sand that sinks in the water. For this reason, when it is used for cultivating the grass of a golf course, it is good that it is porous and has good water retention and fertilizer retention, but on the other hand, it has many voids and is lightweight, so runoff due to rainwater is a drawback.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a porosity peculiar to Shirasu when used for growing grass such as garden, landscaping, horticulture, golf course, soccer ground, tennis court, etc. and lawn divot. It is an object of the present invention to provide colored shirasu particles that have the drawbacks of floating in water due to their light weight and being washed away by rainwater without losing properties such as quality, water retention and rich fertilization properties.

[0008]

[Means for Solving the Problems]

The purpose of the above is to accumulate as a subsoil of the soil and sink to the bottom of the water
After the secondary shirasu containing feldspar, quartz, persenecene and volcanic glass that have been cleaned by the flow is heat-dried,
This is achieved by colored shirasu particles obtained by coloring with an acrylic synthetic resin pigment liquid and heat-drying.

[0009] The above-mentioned purpose is also used as a subsoil of soil.
Feldspars piled up and submerged in the bottom of the water and purified by the flow of water ,
Quartz, 0.2m made Nde including the hypersthene and volcanic glass
A secondary stone that is a natural stone that has been sorted to m-2.0 mm.
Acrylic synthetic resin pigment after heat-drying lath
The colored shirasu particles that are colored with a liquid and dried by heating
Even achieved.

[0010]

[Function] The secondary shirasu (Himuka-type shirasu) containing feldspar, quartz, perilla pyrolite, and volcanic glass deposited as the subsoil of the soil used as the raw material of the present invention and sunk to the bottom of the water is Yamada-cho, Kitaro-gun, Miyazaki Prefecture. It is a type of secondary shirasu, which is a type of shirasu from the Nagao Mountains, which is different from general pyrophoric shirasu and is deposited as a subsoil of Akahoya soil, which does not form a plateau, is submerged at the bottom of the water, and is purified by the flow of water.

Shirasu, which is a raw material stone, includes various things such as pumice and rock fragments having a large particle size and silt and clay particles having a small particle size. Even in the same pyroclastic shirasu, the median particle size value (mm There are some differences in).

Pyramid Shirasu 0.4-0.5 mm General Shirasu Shrimp-type Shirasu 0.1-0.11 mm Secondary Shirasu Yoshida-type Shirasu 0.043 mm Secondary Shirasu Himuka-type Shirasu 2.3-0.09 mm Secondary shirasu of the present invention The Himuka type shirasu used as a raw material of the present invention is a shirasu of the Nagaoyama system in Yamada Town, Kitaroro Prefecture, Miyazaki Prefecture. It is a type of secondary shirasu deposited as subsoil, submerged at the bottom of the water, and purified by the flow of water.

The Hakuho, Shrimp type and Yoshida type shirasu have a grayish white color and cannot be colored to the original color of the pigment because they are gray components even if they are colored with a pigment, but the Himuka type shirasu of the present invention is almost white. It is a shirasu that is close to that of Shirasu and can be colored in the original color of the pigment.

The acrylic synthetic resin pigment liquid used in the present invention is an acrylic synthetic resin emulsion as a base material, for example, acrylic acid alkyl ester resin, acrylic acid-acrylic acid alkyl ester copolymer, methacrylic acid-acrylic acid alkyl ester. Copolymers, ethylene-acrylic acid alkyl ester copolymers, vinyl chloride-acrylic acid alkyl ester copolymers, methacrylic acid-alkyl ester resins, acrylic acid alkyl ester-epoxy copolymers, and specifically, methyl Using methacrylate and butyl acrylate, a pigment of a desired color is added thereto and dispersed in an acrylic synthetic resin emulsion to obtain an acrylic synthetic resin pigment liquid. There are various kinds of pigments to be used depending on the desired color. For example, in the case of blue or green, those commonly used for paints include dark blue, ultramarine blue, cobalt blue and chrome green as inorganic pigments.
Chromium oxide, etc., organic pigments include copper phthalocyanine, metal-free phthalocyanine, indanthrone blue,
Chlorinated copper phthalocyanine, brominated copper phthalocyanine, etc. are preferred, from the viewpoint of safety and coloring to shirasu, Fastogen Super Violet (Fastogen Super Violet), which is a colorant registered by the Vinyl chloride Food Sanitation Council and the Polyolefin Hygiene Council. RV-S, made by Dainippon Ink and Co., Ltd., Fastgen Blue BSF (Fastogen)
A mixture of Blue BSF, manufactured by Dainippon Ink Co., Ltd., Fastgen Green S (manufactured by Dainippon Ink Co., Ltd.) and the like is preferable. The colored shirasu particles of the present invention can be colored not only in blue or green but also in a desired color by changing the pigment, and thus it is possible to obtain a culture soil of various colors for gardening and the like. Further, this acrylic synthetic resin pigment liquid, coating film drying accelerator, pigment dispersibility improver, paint fluidity modifier, paint surface modifier, plasticizer, which is a commonly used paint auxiliary agent,
It is also possible to add an antiseptic agent, a fungicide (antibacterial agent), an ultraviolet absorber and the like.

The method for producing the colored shirasu particles of the present invention is, for example, after digging Nagaoyama type shirasu of Yamada-cho, Kitaro-gun, Miyazaki Prefecture, the ones having a diameter of 2 mm or less are selected, and then 200 to 800 ° C., preferably 250 to 300 ° C. in a rotary kiln. After drying at the temperature of, granules of 0.2 mm or less are removed. Furthermore, since particles suitable for culture soil differ depending on the type of lawn, 0.6-2 mm (A) and 0.2-0.6 mm (B)
Sieving into two types. Shirasu of each particle size is put into a mixer, and acrylic synthetic resin pigment liquid is put and kneaded. After kneading for about 20 minutes to 1 hour, it was confirmed that the synthetic resin pigment filled the voids sufficiently and was colored evenly.
Blowing hot air at -100 ° C, preferably 35-40 ° C,
The mixer is rotated for 15 to 20 minutes, preferably every 15 minutes for 2 to 3 minutes, preferably for 2 minutes to make the drying uniform, and the drying is completed in 8 to 15 hours. Further, as a finish, it is obtained as a product after sieving into two types of 2 mm (A) and 0.6 mm (B) to remove the solidified component by the synthetic resin.

Since the colored shirasu particles of the present invention are porous, they have the effects of being excellent in water retention, retention of fertilizer components, drainage and air permeability.

It has been found that the secondary shirasu deposited as the subsoil of the soil used as the raw material of the present invention and purified with water has a strong dye adsorbing property. Therefore, the acrylic synthetic resin is most easily melted with water. In addition to the excellent adhesion performance and the excellent dye adsorption performance of Shirasu, the phenomenon of elution of the colorant due to long-term rainwater and fading due to ultraviolet rays was solved.

Further, since the hollow portion of the porous rough stone is filled with these acrylic synthetic resin pigments, the specific gravity of the rough stone is 1.0 to 1.1 as compared with the specific gravity of 0.8. As a result, there is no longer any floating due to rainwater, and the intended purpose as lawn soil is fulfilled. Even if synthetic resin pigments fill the voids, the minimum amount of voids necessary for water retention and fertilization remains, so compared to plants that have no water retention or fertilizing properties, such as natural sand. There is a marked difference in their growth.

[0019]

Example 1 Example 2 After excavation of a secondary shirasu in the Nagaoyama system, Yamada Town, Gunma Prefecture, Miyazaki Prefecture 2
About 30 mm or less is selected with a rotary kiln.
After drying at a temperature of 0 ° C. for about 15 minutes, granules of 0.2 mm or less were removed, and 0.6 to 2 mm (35%) and 0.2 to 0.
It was further screened into two types of 6 mm (65%).

Next, each of the sieved shirasu particles is separately added to 1 liter of an acrylic synthetic resin pigment liquid prepared by preparing a green pigment in an acrylic synthetic resin emulsion solution, trade name Full Green (manufactured by Nitto Denko Corporation). On the other hand, 35 liters of shirasu particles were put into a mixer and kneaded.

About 3 parts of the mixture of full green-shirasu particles was used.
After kneading for 0 minutes, make sure that the synthetic resin pigment liquid filled the voids of the shirasu particles evenly, and make sure that the particles were evenly colored, then blow hot air at 50 ° C into the mixer at 15 minute intervals. The mixer was rotated for 2 minutes to homogenize the drying, and the drying was completed in 12 hours.

When hot air is added to a mixture of shirasu particles and acrylic synthetic resin pigment liquid, the shirasu particles and synthetic resin solidify to form agglomerates, which may be removed. 0.6 mm each or 2.
The product was passed through a 0 mm sieve and then packed into a bag to give a green-colored Shirasu particle product.

Comparative Example 1 The same procedure as in Example 1 was carried out except that the secondary shirasu of the Nagaoyama system of Yamada Town, Yamada-cho, Kitaomoro-gun, Miyazaki Prefecture was replaced by a general pyrotechnic shirasu existing on the plateau.

Comparative Example 2 The procedure of Example 1 was repeated, except that the secondary shirasu of the Nagaoyama system of Yamada-cho, Yamagata-gun, Miyazaki Prefecture was changed to the gray-white shrimp-type secondary shirasu present on the plateau.

The following tests were carried out on the colored shirasu particles obtained in Example 1 and Comparative Examples 1 and 2.

(1) Green Coloring Test of Acrylic Synthetic Resin Pigment The colored shirasu particles of Example 1 and Comparative Examples 1 and 2 were visually compared for color difference before and after coloring. The results are shown in Table 1.

[0027]

[Table 1]

(2) Elution Test of Acrylic Synthetic Resin Pigment The colored shirasu particles obtained in Example 1 were immersed in water for 7 days, then about 50 ml of the water was pumped out, and the difference in color before and after immersion was visually observed. Compared. As a result, there was no change in color.

(3) Fading test 200 g of the colored shirasu particles obtained in Example 1 were taken out, placed in a beaker of about 1 liter, and water was supplied through a glass tube, the water supply amount was 1-2 liter / min, and the water temperature was 25 ± 3 ° C.
After draining for 5 hours in running water, draining was performed, and after air-drying, the color was compared with that of untreated colored Shirasu particles as a result of color removal, and no color change was observed.

(4) Lawn growing test The colored shirasu particles obtained in Example 1, shirasu flow shirasu, crushed pumice and tuff, and river sand were each treated at 1,80%.
Fill a 0 cm ³ unglazed bowl and add enough water to it,
Lawn seeds of Kentucky Bluegrass were sown and observed for 10 days of lawn growth. The results are shown in Table 2.

[0031]

[Table 2]

[0032]

The colored shirasu particles of the present invention, which are porous, have the effects of excellent water retention, retention of fertilizer components, drainage and air permeability. Further, the Himuka type shirasu used in the present invention is a shirasu which is almost white and can be colored in the original color of the pigment, so that the colored shirasu particles can be colored in a color very similar to the color of lawn. In recent years, the number of golf courses that spread the color of turf to retain the green during the winter season has increased, but by coloring the ground along with the soil, it is possible to maintain a more beautiful turf surface of the golf course. Also in terms of fertilizer retention, it is a better soil than conventional sand.

Claims (2)

[Claims] 1. Deposited as a subsoil of soil and submerged at the bottom of the water
Colored shirasu particles obtained by heat-drying a secondary shirasu containing feldspar, quartz, perishite and volcanic glass that have been cleaned by the flow of , then coloring with an acrylic synthetic resin pigment liquid, and heat-drying. 2. Water deposited as a subsoil of the soil and submerged at the bottom of the water
The secondary shirasu containing feldspar, quartz, syenite and volcanic glass cleaned by the stream
The colored shirasu particles according to claim 1, which are natural stones sorted by m .