JP3105794B2 - Vegetation for greening - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revegetation vegetation used for revegetation of slopes such as cuts and embankments, and in particular, to stably hold vegetation materials such as seeds and fertilizers disposed on the slopes. The present invention relates to a greening vegetation for preventing plastic pollution and the like.

[0002]

2. Description of the Related Art As a slope greening method, (a) a spraying method of spraying vegetation seeds or fertilizer on a slope having a net-like body, and (b) a vegetation seed or fertilizer on a sheet of nonwoven fabric, paper, thin cotton, or the like. A greening method is known in which a greening vegetation comprising a vegetation sheet sandwiching or adhering to a vegetation sheet and a reticulated body integrally coated with the vegetation sheet is laid on a slope.

[0003] As a reticulated body used for such a greening vegetation, a monofilament or a flat yarn made of a synthetic resin such as polyethylene or polypropylene is used as a warp and a weft to produce a woven fabric such as a plain weave, an entangled weave or a knitted fabric such as a Russell knit. In this case, a net formed in accordance with the slope is used. These synthetic resins have the advantage that they have high strength, are inexpensive, have no fluctuation in strength due to water absorption, and can maintain sufficient strength to protect the slope until plants grow to some extent on the slope.

[0004]

However, synthetic resins such as polyethylene and polypropylene generally have the property that they do not permanently change in quality, and they do not homogenize with soil even if they lose their original shape due to weathering or the like. It contributes to plastic pollution and, ultimately, environmental damage.

[0005] In order to solve this problem, the use of a bast fiber such as a jute for the yarn constituting the net (Japanese Utility Model Publication No.
Japanese Patent Application Laid-Open No. 3-828), those using regenerated cellulose fibers such as viscose rayon (Japanese Patent Publication No. 7-116713), and those using materials that disintegrate by light or the like have been proposed. Further, as a further improvement, those using a blended fiber of viscose fiber and synthetic resin (Japanese Patent Publication No. 7-109099) and those subjected to preservative treatment (Japanese Patent Publication No. 7-91834) are proposed. Have been.

On the other hand, in recent years, completely biodegradable plastics, which are finally converted into carbon dioxide and water by microorganisms, have been developed. These have strength equal to or higher than that of general-purpose polyethylene or the like, but cost about 6 to 10 times that of general-purpose polyethylene or the like. In addition, although it depends on the resin manufacturing method, since the elongation is generally large, there is a problem that it is difficult to obtain a net-like material having a uniform mesh size alone, and the fact is that it has not reached widespread use. .

[0007]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a planting plant for greening which can be produced as inexpensively as possible without causing plastic pollution and which can be produced without improving the conventional production process. Is intended to
A woven or knitted fabric in which yarns or strings made of cotton and yarns or strings made of completely biodegradable plastic are alternately arranged as wefts and warps at intervals of several millimeters to several tens of millimeters. And a vegetation sheet having a seed, a fertilizer, and a soil conditioner. A vegetation sheet is disposed on the lower surface of the mesh, and the mesh and the vegetation sheet are integrated by heat sealing. Also, it is preferable to use cotton that has not been subjected to a degreasing treatment.

[0008]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a vegetation according to the present invention and a greening net 10 constituting the vegetation.
This is composed of a warp yarn 12 and a weft yarn 14 arranged at a predetermined interval (for example, several millimeters to several centimeters).

The mesh 10 may be a woven fabric produced by passing a weft between warps arranged at predetermined intervals, such as a plain weave or an entangled weave, or a chain knit with a warp, such as a Russell knit. The knitted fabric may be manufactured by connecting adjacent chain stitches with an insertion yarn while forming the knitted fabric. In the case of the latter knit, the warp 12 corresponds to chain knitting and the weft 14 corresponds to an insertion yarn. Further, the intervals between the warp yarns 12 and the weft yarns 14 do not need to be equal, and the interval between the weft yarns 14 may be wider than the interval between the warp yarns 12 as shown in the drawing, or vice versa.

In this embodiment, the warp 12 and the weft 14
In this method, yarns made of a completely biodegradable plastic and a natural fiber material are alternately used every other yarn. In addition, since natural fibers have a smaller elongation than fully biodegradable plastics, if the same tensile resistance is required in the warp and weft directions, complete biodegradable plastic and natural When a fiber material is arranged and the tensile resistance in the warp direction is greater than that in the weft direction, the ratio of the natural fiber material in the weft is larger than that in the Do more. in this way,
By adjusting the ratio between the completely biodegradable plastic and the natural fiber material, strength and elasticity according to the purpose can be obtained. Furthermore, since the load applied to the mesh body is borne by the natural fiber which exceeds the tensile resistance, the load applied to the completely biodegradable plastic having a greater elongation than the natural fiber is small, and a mesh body having a uniform mesh size can be obtained.

The warp yarns 12 and the weft yarns 14 need not be simple yarns, but may be, for example, a string obtained by bundling a plurality of yarns or a twisted string thereof. Also, in the case of completely biodegradable plastic, flat yarn manufactured from this material,
Alternatively, a string obtained by twisting a monofilament or a twisted string obtained by twisting a plurality of monofilaments may be used.

In this embodiment, a completely biodegradable plastic is used for the reinforcing cords 12a at both ends arranged in parallel with the warp yarns 12. This is because complete biodegradable plastic has a higher degree of freedom in cross-sectional design than natural fiber materials (that is, it can have any cross-sectional shape, thickness, width, etc. by extruding complete biodegradable plastic). Also, since there is no change in dimensions and strength due to water absorption, construction can be easily performed even in rain.

Any known biodegradable plastics can be used. These biodegradable plastics have various manufacturing methods, and have different characteristics depending on the production methods. However, they have strength and moldability equivalent to or close to that of polyethylene. Therefore, by using the flat yarn in the form of a net, a net-like body that is easily adapted to the slope can be obtained.

Cotton yarn is used as the natural fiber material. The reason is that cotton yarn has the smallest fiber diameter, short fiber and low Young's modulus as a vegetable fiber, so it is easy to twist, and yarns of each count can be easily obtained, and the tensile strength increases by twisting. Is easy to obtain. That is, a thread or a string having the required strength can be easily obtained.

[0015] Cotton yarns are usually covered on the surface with natural wax. Then, this wax is removed by performing a degreasing treatment in a manufacturing process in a general cotton product. However, the cotton yarn used in the present invention can be used without degreasing. As a result, the water absorption is smaller than that of other plant fibers due to the action of the wax, so that it is hardly corroded, and the strength can be maintained for a long period of time.

The reticulated net 10 constructed as described above
Is attached to a vegetation sheet 16 which holds vegetation seeds, fertilizer, soil improvement material, etc. on a sheet of paper, nonwoven fabric, etc., and is laid on a vegetation board integrally therewith. In addition,
When integrated with the vegetation sheet 16, the completely biodegradable plastics are alternately arranged, and since most of the completely biodegradable plastics are heat-meltable, they can be integrated with the vegetation sheet simply by applying heat to the plastic. There are advantages. In addition, since the thread made of a natural fiber material having excellent tensile resistance is used at predetermined intervals in the warp direction and the weft direction for the greening net 10 of the present invention, it is used during production, transportation, and construction. Sometimes, even if extra force is applied to the vegetation sheet, the mesh does not stretch, and even if one of them decomposes after construction, the mesh is kept by the other, which has a lower decomposition rate, and the plant Prevents soil erosion and collapse due to rainfall until completely grown.

[0017]

As is clear from the above description, in the planting plant for greening of the present invention, the warp and the weft are alternately composed of completely biodegradable plastics and natural fibers one by one. Compared with the one made of completely biodegradable plastic, a net with no knitting unevenness and high strength can be obtained, and it is inexpensive. In addition, since the thread or the string made of cotton having high tensile resistance is arranged in both the warp direction and the weft direction, the vegetation sheet is not damaged at the time of production, transportation, and construction. In addition, if the reinforcing cords arranged in parallel with the warp are made of completely degradable plastic, the strength of the reinforcing cords will not be reduced even if it is touched by water, which hinders construction in the rain. There is no. Furthermore, these biodegradable plastics and cotton both have a temporal difference with the passage of time, but are decomposed by microorganisms and finally homogenized with soil, so that no plastic pollution is caused. In particular, by using the cotton yarn, which is a natural fiber material, without performing a degreasing treatment, the strength can be maintained until the growth of the vegetation material without any special treatment, and the ground can be prevented from erosion.
And, of course, cotton and biodegradable plastic have different decomposition rates, but both are arranged as warp and weft, so that after one is decomposed, the other retains the reticulated body until the plant grows. Erosion and collapse of the slope due to rainfall can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a plant for greening according to the present invention.

[Explanation of symbols]

10 ... reticulated body, 12 ... warp, 14 ... weft, 16 ... vegetation sheet.

Continuation of the front page (56) References JP-B 7-116711 (JP, B2) JP-B 7-91834 (JP, B2) Jiko 63-828 (JP, Y2) (58) Fields surveyed (Int) .Cl. ⁷ , DB name) E02D 17/20 102

Claims (2)

(57) [Claims] 1. A weaving or weaving method in which yarns or strings made of cotton and yarns or strings made of completely biodegradable plastic are alternately arranged as wefts and warps at intervals of several millimeters to several tens of millimeters. It has a knitted mesh, a seed, a fertilizer, a vegetation sheet having a soil conditioner, a vegetation sheet is arranged on the lower surface of the mesh, and the mesh and the vegetation sheet are integrated by heat sealing. Characteristic vegetation for greening. 2. The vegetation for greening according to claim 1, wherein said string-like body is made of cotton which has not been degreased.