JPH0452811B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vegetation net that has excellent adhesion to slope surfaces, stabilizes vegetation material, and has high heat retention properties.

(Prior Art) Conventionally, various types of nets have been used as materials for greening slopes, but a large number of anchoring tools are required to quickly adapt to the unevenness of the slope. In addition, recently, the so-called medium to thick layer soil spraying method, in which nets are stretched on the slope and a medium to thick layer of soil material is sprayed, has been used for greening slopes on hard soils, soft rocks, etc. However, in this case, it is necessary to keep the nets at a certain distance from the slope in order to stabilize the soil material that has been sprayed in a medium to thick layer (necessary to prevent the soil from being washed away).

(Problems to be Solved by the Invention) However, with conventional nets, when the slope is extremely uneven, it is impossible to maintain the nets at regular intervals, or a separate spacing material ( It was necessary to anchor the slope and the net at regular intervals using spacers. In this case, extra construction labor is required to anchor the spacer, and the anchored spacer can also be damaged by workers walking over the stretched net for spraying or other operations. There were various problems in terms of economics and construction efficiency, such as falling off and not functioning as a spacer.

Regarding the above-mentioned vegetation nets used in conventional greening work, the present inventors have repeatedly studied vegetation nets that have excellent adhesion and can prevent the sprayed soil from washing away. Taking the idea of using spacers together, we decided to integrate these nets and spacers, and to use foam such as foamed plastic as a material that has good adhesion between the slope and the nets. I believe that the conventional problems can be solved by doing so.
As a result of repeated experiments with various materials, the present invention was achieved.

(Means for Solving the Problems) That is, the present invention is a vegetation net in which the entire wire rods constituting the net-like body are covered with a foam.

The vegetation net of the present invention will be explained in more detail with reference to examples.

As the nets used in the present invention, vegetable or chemical fiber nets, or wire nets can be used.
1.5 to 3.0cm), use one with a slightly larger mesh.

Various foaming agents can be used in the present invention, and the manner in which they are used will be described below.

(Example) 1 After applying a one-component foaming agent to the above net or adhering it by a method such as spraying,
The foaming agent is foamed by heating to form a vegetation net in which the wires of the net-like body are entirely covered with the foam.

For example, apply about 80 g of the above foaming agent per m ² to a tortoise shell wire mesh made of vinyl-coated iron wire with a diameter of 1.0 mm and a mesh size of 40 to 50 mm, and after preliminary drying,
By passing through a hot air drying dome at 100° C. to 140° C. for about 1 minute, a vegetation net having a thickness of 3 to 15 mm and having the entire wire constituting the net-like body covered with a foam was obtained.

When we stretched this vegetation net on the slope where greening work was planned and investigated its working conditions and effects, we found that even though the number of pegs for fixing anchors was approximately 10% less than that of the conventional hexagonal wire net, Similarly, they were able to quickly adapt to the unevenness of the slope and anchor.

In addition, after installing this vegetation net, we sprayed the entire slope with medium-layer soil to a thickness of about 3 cm, and compared the sprayed material washed away after rain with the conventional hexagonal wire netting, it was found that approximately 30% of the sprayed material was washed away after rain. The loss of water was reduced.

Several types of one-component blowing agents can be used, including acrylic-based Picotskufoam (trade name) and thermally expandable foam that has a shell wall made of vinylidene chloride copolymer and contains low-boiling hydrocarbons. A mixture of 10 to 20% microcapsules in an aqueous urethane resin, acrylic resin, acetic acid emulsion, etc. can be used.

2. A covering layer of a foam foamed with a two-component foaming agent is formed over the entire wire of the net to form the vegetation net of the present invention.

For example, using a foaming agent made by mixing urethane resin and protein aqueous solution at a ratio of 4:1,
A foam with a volume approximately 20 times larger is obtained. During this foaming, a foaming agent is applied to surround the wire that makes up the net, and the foaming agent is foamed to form a covering layer of foam over the entire wire. This forms a vegetation net.

In addition to the above-mentioned urethane types, various types such as combinations of urea types, polyols, and polyisocyanates can be used.

3. Another way to form a net for vegetation in which the entire wire is covered with foam is to coat or spray a one-component foaming agent onto a wire made of plants, chemicals, metal, etc., and then heat it to remove the foaming agent. Let it foam,
Constructing a wire rod entirely covered with foam,
A two-component foaming agent is attached to the above-mentioned wire to form a wire completely covered with foam, and a vegetation net is braided with this wire to create a vegetation net covered entirely with foam. form a network.

In addition, when using a one-component foaming agent, the foaming agent is applied to the wire in advance, the net is braided, the net is formed, and the wire is heated and foamed using a drying dome, etc., so that the entire wire is made of foam. May form covered vegetation nets.

In this case, the above-mentioned 1.
A liquid foaming agent is applied and foamed to form a wire completely covered with the foam in the same manner as above, and this is braided into a net to form a vegetation net in which the entire wire is covered with the foam. .

In this way, the fertilizer etc. will gradually leach out from the vegetation net, and when applied to a local slope, the fertilizer effect can be maintained for a long period of time.

In addition, it is possible to mix various vegetation materials into the above-mentioned foam, and by mixing one or more of seeds, fertilizers, soil conditioners, etc. with the foaming agent, it is possible to maintain the fertilizing effect.

For example, it is possible to add effects such as sustained fertilizing effect to the above-mentioned one-component Peaco Stock Foam (trade name) without destroying the function of the vegetation net of the present invention even at a volume ratio of about 1:1. can. Also,
Similar materials can also be mixed into two-component blowing agents and blowing agents for extrusion and molding.

In order to use the vegetation net of the present invention formed as described above as a greening material, the vegetation net of the present invention is developed on the slope planned for afforestation, and after being stretched using an anchoring tool, A spray material that combines seeds, fertilizers, fibrous materials, organic materials, soil improvement materials, local soil, etc. according to local conditions is mixed with water, and a pump or other power spraying machine is used to spread the above-mentioned vegetation net. Spray it on the surface.

In addition, using the vegetation net of the present invention, seeds,
It is also possible to construct a vegetation substrate to which fertilizers, soil improvement materials, etc. are adhered directly or through pieces of paper cloth or cotton-like material, and the vegetation substrate constructed in this way is stretched over bare slopes for greening. Construction can also be carried out.

(Effects of the Invention) As described above, the present invention is a vegetation net in which the entire wire rod constituting the net is covered with a foam, so it has better adhesion to slopes than conventional nets. Because of its excellent properties, it can stick closely to the slope without using a small amount of anchorage.

In addition, in the medium to thick layer spraying method, a spacer is used to stabilize the sprayed material.In the present invention, the net is integrated with a foam having a spacer function. Therefore, there is no need for a spacer, and compared to the case where a spacer is used, materials and labor can be reduced.

Furthermore, since the foam used in the present invention contains a large amount of air within the foam, it is lightweight and easy to handle, and has excellent heat retention, so it has the effect of promoting germination during winter construction.

Furthermore, as described above, by mixing fertilizer, soil improving material, etc. into the foam, it is possible to maintain the fertilizer effect and add the effect of a soil improving material.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the vegetation net of the present invention. In the figure, 1 is a vegetation net, 2 is a wire, and 3 is a foam.

Claims (1)

[Claims] 1. A net for vegetation in which the entire wire rods constituting the net are covered with foam.