JPH06169638A - Vegetational substrate for greening - Google Patents

Abstract

PURPOSE:To obtain a vegetational substrate capable of maintaining sufficient tensile strength for, e.g. about a half year to 2 years after laying and then decomposing and corroding thereafter. CONSTITUTION:This vegetational substrate for greening 1 is obtained by applying a soluble material 5 to either of surfaces of a net 2, fixing vegetational seeds 7 to the surface of the soluble material 5 with a water-soluble paste 8 and constructing the net 2 from a corrosive material treated with an antimicrobial agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vegetation substrate for greening (hereinafter referred to as a vegetation substrate) used in a slope greening method.

[0002]

2. Description of the Related Art A vegetation system in which the above slope is one of the greening methods, in which soft cotton is attached to one surface of a net, and vegetative seeds are fixed to the surface of the soft cotton with a water-soluble sizing agent. There is a method of laying on a slope a vegetation substrate formed by sticking a soluble sheet in which vegetation seeds are firmly sandwiched with a water-soluble sizing agent on one surface of the substrate or net. According to this method, the net prevents erosion of the slope due to rainfall, snow melting, wind erosion, frost heave, etc., and the vegetation seeds that have adhered to the vegetation substrate have germinated and grown within several years. Can be protected.

The net used as the base member in the vegetation base has heretofore often been a net made of a chemically synthesized plastic such as polyethylene (PE) or polypropylene (PP). The reason is that these plastics are durable and inexpensive, and when planting on the slopes, the net protects the slopes until the plant roots on the slopes and grows to some extent. This is because it is essential to become a greening base material.

[0004]

However, the above-mentioned plastic has a characteristic that it does not deteriorate semipermanently under normal conditions. Therefore, unlike other plant-based materials or animal-based materials, it does not change over many years. It will not be weathered or corroded by exposure to wind and rain and become homogenized with soil or soil. For this reason, in recent years, such characteristics have been regarded as a disaster.
It has become a global environmental problem as plastic pollution.

Therefore, under such a circumstance, the use of a plastic net in a slope greening method or the like contributes to environmental greening on the one hand.
On the other hand, it also promotes plastic pollution.

In order to avoid the problems caused by the above-mentioned characteristics of the plastic material, a net made of a vegetable material such as jute has been used in the past. Further, viscose rayon is a so-called corrosive material which is made of regenerated cellulose and which is completely corroded even after a long period of time, and can be applied to a loom relatively easily. -82
As proposed in Japanese Patent Publication No. 8, it is attempted to be used in a case where the net is partially corroded. Further, in addition to viscose rayon, a net using a biodegradable plastic as a corrosive material has been proposed in, for example, Japanese Utility Model Publication No. 3-5746.

As described above, in order to corrode the net, it has been proposed to construct it by using various corrosive materials, but in the past, these have not been used so much. The reason is as follows. That is, when a corrosive net is laid on the slope, most of these nets are corroded about two months after the net is laid on the slope, and the required strength is lost. And for the plants to germinate from the vegetation substrate, the period of 2 months is too short for the plants to grow and flourish sufficiently, and therefore the original purpose of protecting the slopes with the net and growing the plants can be achieved. Can not.

Therefore, an ideal vegetation substrate for use in slope protection, etc. maintains mechanical strength such as sufficient tensile strength for about 6 months to 2 years after laying, and after the plant has grown to a certain extent. It can be said that it eventually corrodes and homogenizes in the soil.

The present invention has been made in consideration of the above-mentioned matters, and its purpose is to maintain sufficient tensile strength for, for example, the last six months to two years after installation, and then to disassemble and
It is to provide a vegetation substrate that will corrode.

[0010]

In order to achieve the above object, in the first invention, a soluble material is attached to one surface of a net, and a vegetation seed is used on the surface of the soluble material with a water-soluble paste. In the vegetation base for greening, which is firmly fixed, the net is made of a corrosive material treated with an antibacterial agent.

In a second aspect of the present invention, in a vegetation substrate for greening, wherein a soluble sheet in which vegetation seeds are fixed and sandwiched is attached to one surface of the net, the net is made of a corrosive material treated with an antibacterial agent. I am configuring.

According to a third aspect of the present invention, there is provided a vegetation base for greening, comprising plant seeds attached to one surface of a net.
The net is made of a corrosive material treated with an antibacterial agent.

[0013]

The net body of the vegetation substrate according to the above invention is made of a corrosive material treated with an antibacterial agent. Has the required strength. Then, as the effect of the antibacterial treatment weakens or disappears, corrosion begins, which is also corroded and returned to the soil.

In any of the above-mentioned inventions, the net prevents erosion on the slope due to rainfall, snow melting, wind erosion, freezing, etc., and the vegetative seeds adhered to the vegetation substrate are germinated and grown. The slopes can be protected by greening within the year.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a vegetation substrate 1 according to the first embodiment. In this figure, 2 is a net composed of warp yarns 3 and weft yarns 4, the size of which is, for example, width 1 m × length 5.
m, and the mesh size is 2 cm. Corrosion time is longer than that of normal viscose rayon, but the strength of the viscose rayon decreases with time. Is woven into. Although a reinforcing rope (not shown) is often provided, this reinforcing rope is also made of viscose rayon treated with an antibacterial agent.

Reference numeral 5 denotes a soluble material which is attached to one surface of the net 2 by using a water-soluble sizing agent 6. 7 is a vegetation seed fixed with a water-soluble sizing agent 8 so as to be uniform on the entire surface of the cotton wool 5. Where soluble material 5
As a cotton, which does not hinder the germination and growth of vegetation,
Examples include staple fabrics, pulp fabrics, and soluble papers.
Further, as the water-soluble sizing agents 6 and 8, there is polyvinyl alcohol. Furthermore, as vegetation seeds, Kentucky 3
1 fescue, Ui ping Love grass, white clover, Bermuda grass, creeping red fescue, grass seed, such as red top, silver grass, mugwort, Medohagi, wild grass seed such as Japanese knotweed, Hagi weasel, Yamahagi, red pine, and shabu-shabu , Tree seeds such as chopped daisies, yellow daisies, French chrysanthemums, saw grass, California poppies, purple hanahana, gypsophila, cosmos,
There are flower seeds such as keito, kawaranadeshiko, ginseng.

To green the slope using the vegetation substrate 1, for example, as shown in FIG. 2, after properly shaping the slope 9 to be constructed, the net 2 is placed above and the vegetation seeds 7 are provided. The vegetation substrate 1 so that the raised surface is close to the slope 9
Lay on top. Then, after the surface of the vegetation substrate 1 on which the vegetation seeds 7 are provided is brought into close contact with the slope 9, the vegetation substrate 1 is fixed using a pressing member 10 such as a gold skewer.

The vegetation substrate 1 laid on the slope 9 as described above has a characteristic that its net 2 is treated with an antibacterial agent unlike ordinary viscose rayon, and its strength decreases with the passage of time. Since it is made of viscose rayon, the necessary strength can be maintained and the slope 9 can be protected for about 6 months to 2 years after its construction. On the other hand, the vegetation substrate 1
The vegetation seeds 7 adhered to the seeds are germinated when the water-soluble sizing agent 8 melts and falls on the slope 9 upon receiving rain or the like, absorbs fertilizers and water retention materials, and cultivates pasture and wild grass. ,
Appropriately grows into woods.

On the other hand, in the vegetation substrate 1, the net 2 is gradually reduced in strength after the plant grows to some extent and grows, decomposes and corrodes into tatters, and finally becomes soil. Also, the soluble material 5 attached to the net 2 is decomposed after a certain period of time (a period required for plants to germinate and to grow to some extent), and becomes homogenized with soil. Therefore, the slope 9 is entirely greened by a predetermined plant.

FIG. 3 shows a vegetation substrate 1 according to a second embodiment. In this embodiment, a vegetation seed 7 is prepared by using a water-soluble sizing agent 8 between two soluble sheets 11 and 12. One of the soluble sheets 11 and 12 having the vegetation seeds 7 sandwiched therebetween is firmly sandwiched on one surface of the net 2 using the water-soluble sizing agent 6. Here, as the soluble sheets 11 and 12, crepe paper, a water-soluble non-woven fabric, a polymer-based film or a starch-based film or a water-soluble paper with a cold-lacquer cloth, which does not hinder the germination and growth of vegetation and is more soluble in water, For example, there is a product name, Ponric (manufactured by Venus Paper Co., Ltd.). Since the operation and effect of this embodiment are the same as those of the above-mentioned embodiment, the description thereof is omitted.

FIG. 4 shows another embodiment of the net 2. The net 2 shown in FIG. 4A also has warps 3 and wefts 4 made of viscose rayon treated with an antibacterial agent.
Is a monofilament, and the weft 4 is a flat yarn. Also, in the net 2 shown in FIG. 2B, the warp yarn 3 and the weft yarn 4 are made of viscose rayon treated with an antibacterial agent, and particularly, the weft yarn 4 is made of a tape-shaped flat yarn. According to the net 2 configured in this manner, the light-shielding rate increases and the heat retaining effect increases, which is particularly effective in cold regions.

As the corrosive material, there are various materials such as animal, vegetable and chemical. For example, animal and vegetable materials include natural fibers such as leather, wool, cotton, hemp and pulp. Is typical. In addition to chemical materials, there are polyolefin-based materials that have been easily corroded by chemicals, recycled fibers such as viscose rayon, microbial degradable plastics, and photodegradable plastics. Examples of biodegradable plastics include trade name Tone (manufactured by AMKO, USA), trade name Pullulan (manufactured by Hayashibara Co., Ltd.), and trade name Thor Phil (manufactured by Mitsubishi Rayon Co., Ltd.). And
The photodegradable plastics include, for example, trade name Polygrad (manufactured by Anvas, USA) and trade name Plastigon (manufactured by Ideamasters, USA).

Next, a procedure for treating viscose rayon, which is a regenerated fiber among the corrosive materials, with an antibacterial agent will be described with reference to FIG. In this figure, 1
3 is a known viscose rayon manufacturing device, 14 is a dryer, 15 is an antibacterial treatment tank containing an antibacterial agent 16, 17 is a pair of squeezing rollers, 18 is a dryer, 19 is a curing device, and 20 is a winding device. Is. And the antibacterial agent 16
For example, lauryl, dimethyl, benzyl, ammonium, chloride ... Trade name Mailrapit V-4
3 or octadecyl dimethyl benzyl ammonium chloride ... Meikabinone SMB-85 (all manufactured by Meisei Chemical Industry Co., Ltd.) or the like can be used as a 1 to 10% solution.

In the apparatus thus constructed, the viscose rayon 21 fed from the viscose rayon production apparatus 13 is pre-dried in the dryer 14 at an appropriate temperature. Pre-dried viscose rayon 21
Is made to bury the antibacterial agent 16 in the antibacterial agent treatment tank 15. Next, viscose rayon 21 with antibacterial agent 16 hidden therein
Are appropriately squeezed by the squeezing roller pair 7, and the dryer 1
8, and a predetermined drying process is performed. Then, the viscose rayon 21 that has been subjected to this drying treatment is, for example, in the curing device 19 at 150 ° C. for 3 minutes, or
After being cured at 170 ° C. for 1 minute, it is wound by the winding device 20.

FIG. 7 shows the viscose rayon 22 treated with the antibacterial agent as described above. In the figure (A), the coating layer 23 of the antibacterial agent 16 is formed on the outer periphery of the viscose rayon 21. Has been formed. In addition, as shown in FIG. 1B, the coating layer 2 is formed on the outer periphery of the viscose rayon 21.
3 is formed, and the permeation layer 24 in which the antibacterial agent 16 is impregnated from the surface is also formed over the entire circumference.

In addition, in the step of producing viscose rayon, that is, in a viscose solution containing regenerated cellulose, an antibacterial agent such as the above-mentioned trade name Meirapit V- is used.
43, Meikavinone SMB-85 or the like may be internally added at the stage of the viscose solution. In this case, as the composition of viscose rayon to which the antibacterial agent is internally added, it is preferable to add Meilapitt V-43 to the viscose solution at a ratio of 1 to 5%.

The antibacterial agent treatment of a corrosive material such as viscose rayon is not limited to that shown in FIG. 5, but may be constructed as shown in FIG. 6, for example.
That is, in this figure, the viscose rayon 21 fed from the viscose rayon production device (not shown)
Is passed through the antibacterial agent applicator 25 to apply the antibacterial agent 16 on the surface thereof, and thereafter, it is dried by the dryer 26, and after further performing a predetermined curing by a curing device (not shown), It is wound by the winding device 20.

The antibacterial agent-treated viscose rayon 22 shown in FIGS. 7A and 7B can be obtained by the antibacterial agent treatment shown in FIG. 5 or 6.
This viscose rayon 22 is different from the conventional viscose rayon 21 in that there is little decrease in strength when wet,
It has the same characteristics as the strong rayon. Then, by using the Russell weaving machine using the viscose rayon 22 treated with such an antibacterial agent, for example, the net 2 shown in FIGS. 1, 3 and 4 can be constructed. You can get the net.

The net treated with the antibacterial agent is, as in the above-mentioned embodiment, a material before being woven on the loom, that is, at the stage of monofilament or flat yarn.
You may use a machine treated with an antibacterial agent to form a net using a loom, or, after knitting or weaving a net of a predetermined shape using a monofilament or flat yarn,
This may be immersed in the antibacterial agent, or the antibacterial agent may be applied by means such as showering or spraying.

By the way, the following experiment was conducted in order to examine the degree of corrosion and the tensile strength of the antibacterial treated net. That is, two strands of 2000 denier viscose rayon (tape shape) were prepared, one of which was impregnated with a 5% solution of the above-mentioned Meila Pit V-43 as an antibacterial agent, and the other of which was not treated, and these were flattened. 1 in the field
When it was laid in April 992 and the degree of corrosion and the tensile strength after laying were examined, the results shown in Table 1 were obtained.

[0032]

[Table 1]

From Table 1 above, it can be seen that the wire treated with the antibacterial agent is hardly corroded even after half a year and the tensile strength is maintained at about 79% of the initial value. . Therefore, if the tensile strength of the reticulate body is 0.6 or more, the function as the reticulate body is sufficiently satisfied. Therefore, the reticulated body woven with the strands of the viscose rayon treated with the antibacterial agent is about two years after the laying. Is considered to have the same effect as the conventional net. In addition, in the above test, it should be added that the net was covered with vegetation half a year after the installation.

As can be understood from the above description, by applying the antibacterial treatment to the net made of a corrosive material, it is possible to maintain a desired strength within a predetermined period after installation. By the way, the decomposition / corrosion of the net made of corrosive material is due to the presence of bacteria that decompose / corrode the corrosive material. Therefore, if the activity of bacteria can be suppressed for a certain period, the decomposition / corrosion of the net made of corrosive material will occur. Can be delayed for a certain period.

[0035]

As described above in detail, when the vegetation substrate according to the present invention is laid on a slope or the like, it can maintain a desired strength within a predetermined period after the net is laid and the lapse of the period. After that, the erosion is prevented by the net because the slope is gradually decomposed and corroded. And, since the vegetation seeds attached to the vegetation substrate germinate and grow, and the strength of the net is maintained until a predetermined plant grows, the plant does not run away,
The slope is greened all over. On the other hand, the net gradually deteriorates in strength, is gradually decomposed, and is broken into pieces, and eventually falls into soil.
Therefore, unlike conventional methods, it is possible to promote greening without promoting plastic pollution.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a vegetation substrate according to the present invention.

FIG. 2 is a cross-sectional view showing a method of greening a slope using the vegetation substrate.

FIG. 3 is a perspective view showing another example of a vegetation substrate according to the present invention.

4A and 4B are perspective views showing an example of a net used in the present invention.

FIG. 5 is a diagram showing an example of a step of applying an antibacterial agent treatment to a corrosive material.

FIG. 6 is a diagram showing another example of a step of applying an antibacterial agent treatment to a corrosive material.

7 (A) and 7 (B) are diagrams showing a cross section of a corrosive material treated with an antibacterial agent.

[Explanation of symbols]

1 ... Vegetation substrate, 2 ... Net, 5 ... Soluble material, 7 ... Vegetation seed, 8 ... Water-soluble sizing agent, 11, 12 ... Soluble sheet.

Claims (4)

[Claims] 1. In a vegetation substrate for greening, comprising a soluble material attached to one surface of a net, and vegetative seeds fixed to the surface of the soluble material with a water-soluble sizing agent, the net being treated with an antibacterial agent. A vegetation substrate for revegetation, which is composed of a corrosive material subjected to 2. A vegetation substrate for greening, comprising a soluble sheet having vegetation seeds fixedly sandwiched on one surface of the net, wherein the net is made of a corrosive material treated with an antibacterial agent. A vegetation substrate for greening. 3. A vegetation substrate for greening, comprising vegetation seeds adhered to one surface of a net, wherein the net is composed of a corrosive material treated with an antibacterial agent. . 4. The vegetation base material for greening according to claim 1, wherein the antibacterial agent contains dimethyl benzyl ammonium chloride as an active ingredient.