JPH0678637A - Method for environmental protection to reduce underground contamination - Google Patents

Abstract

PURPOSE: To provide a protecting method suitable for reducing the environmental influences of treatment agents in an area to be protected such as a lawn area to spread a protecting layer composed of a flexible material over such an area. CONSTITUTION: The protecting layer is composed of a thermoplastic sheet material, on which any obvious hole is not provided in flattened state, for a fixed length and on this sheet material, slits are formed so that moisture can be passed in the case of rainfall. Besides, this sheet material is constituted so as to grow plants by reaching sunlight the protective area.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to protection techniques for environmental purposes.

[0002]

2. Description of the Related Art Environmental protection has become a most important issue in many countries because various chemicals such as herbicides, insecticides and fertilizers must be used in various places. Still, current technology requires the use of various agents to adequately control undesired vegetation and pests, or to provide growth and / or nutritional value to areas such as lawns and golf courses.

Reducing the total amount of drug used for a given application is sometimes done by reducing the amount of drug, but the minimum required amount must be used to provide the necessary control. I won't. However, even with various application techniques, the effectiveness of the active ingredients of the drug is diminished by the effects of weather such as rain and wind or exposure to wind and rain.

Further, depending on weather conditions such as rain and wind,
There is often a problem that the components of the drug flow out from the site where the drug is used to an area adjacent to or downstream of the site. For example, while it rains on a lawn or crop area, the flow of rainwater causes the drug to flow to adjacent areas. As a result, not only is the drug less effective or ineffective where it is believed to be effective, but a more complex problem is that the drug may adversely affect adjacent areas, or rainwater may cause the drug to reach downstream. It is carried to the water supply system on the side.

It would be desirable to have a method and apparatus that would reduce the effects of chemicals and the like on the downstream and adjacent areas, particularly in areas sensitive to chemical treatments, due to wind, rain, or both. It also maximizes the effect of the drug at the desired location to achieve the desired effect without the need for excess drug, while protecting the location from destructive external influences. It is also preferable to do so.

According to the present invention, it has been developed that the above-mentioned characteristics can be achieved by forming a protective layer on the place to be protected, and that undesired contamination received in the adjacent region and the downstream region can be reduced.

The present invention will be described in more detail. According to one aspect of the present invention, there is provided an environmental protection method for reducing the environmental influence caused by the outflow of a processing agent at a certain place, which provides an area to be protected and transmits light. A protective layer of a flexible material that is permeable and permeable to air and moisture is laid down in the area, the protective layer being substantially flat when the protective layer is in the flat state, but the influence of moisture Environmental protection characterized by comprising a sheet material of a certain length provided with a plurality of slits spaced apart from each other that can be deformed by receiving, and fixing the protective layer so that it can be removed from the area. A method is provided.

According to a preferred embodiment of the invention, as a particularly preferred feature of the above method, the protective material comprises a plurality of layers of open mesh woven thermoplastic material, the layers being in a flat state. To form a substantially uniform protective layer provided with a plurality of spaced slits formed by crossed strands of opposing layers of thermoplastic material, although there are substantially no open pores. Is configured.

As another preferred feature of the present invention, according to another embodiment of the above method, the site to be protected is treated with one or more agents prior to laying the protective layer,
The protective layer is configured to hold the drug in place for a sufficiently long period of time so that the site can be treated without spilling too much of the drug into adjacent areas around the site. ing.

A preferred feature of the present invention as a further embodiment of the above method is that the protective layer comprises a transparent layer made of a protective material.

In yet another preferred embodiment of the present invention, the protective layer is formed of an open mesh weave of thermoplastic material, the open mesh weave being substantially closed when in the flat condition. Comprising cross layers of thermoplastic material forming a state, comprising a plurality of layers, wherein the open mesh weave of said thermoplastic material comprises a plurality of slits formed by the cross strands of said open mesh weave. A method is provided, which allows moisture to pass through when the moisture pressure acts on the thermoplastic material.

According to another feature of the present invention, in a method of manufacturing a protective layer laid in a region to be protected, a plurality of supply rolls of protective material are provided, and each of these rolls has a predetermined length in a sheet form. A protective material is provided, each length of protective material having a predetermined width and a predetermined length, and an opposing layer of each protective material of a predetermined length having at least one lateral edge thereof. Arranged side by side and folding said juxtaposed lateral edges of each length of sheet material to form a thickness of 4 layers, said folded lateral direction being about 1.25-3.25 stitches per cm Provided is a method of manufacturing a protective layer, which comprises sewing an edge.

In a preferred embodiment of the above method for producing a protective layer, the protective material comprises a plurality of layers of open mesh woven thermoplastic material, the layers being substantially when in the flat state. Is intended to form a substantially uniform protective layer having a plurality of spaced slits formed by crossed strands of opposing layers of thermoplastic material although there are no open holes at all .

In yet another preferred embodiment of the above method of producing a protective layer, the protective layer comprises a transparent layer of protective material.

In yet another preferred embodiment of the above method for producing a protective layer, the protective layer is formed of an open mesh weave of thermoplastic material, the open mesh weave being in a flat state. A plurality of layers of crossed strands of thermoplastic material forming a substantially closed condition, the open mesh weave of thermoplastic material comprising a plurality of slits formed by the crossed strands of the open mesh weave. Is provided so that the moisture can pass through when the moisture pressure acts on the thermoplastic material.

To explain the invention in more detail, the invention is particularly useful for protecting certain selected environmentally sensitive areas, which must protect, for example, lawns and vegetation. Generally, places where such protection is needed are compared to, for example, natural grass baseball fields where special care is required for the infield, lawn bowling fields where grass needs to have special properties, and playgrounds. It is a golf course where it is necessary to maintain the lawn to a high standard. These plants use a variety of vegetation that is much more densely packed than adjacent areas, and in order to achieve vegetation growth and maintain certain standards in these areas, a variety of fertilizers and herbicides are used. It is necessary to use the above chemical treating agent.

As noted above, when water flows or rains in these areas, the spillage of these waters causes some (or a large amount) of chemical treatment agent to flow into adjacent areas,
In some cases, it may flow into a stream such as a river. Although these treatment agents are preferably retained in the areas where they function effectively, this requires that the agents be retained only in the areas to which they are applied.

An advantage of the present invention is that a small amount of drug is required to achieve the desired result and the drug can be retained in a large area to be treated as compared with the prior art. Also, since the flow of water can be controlled and the amount of water lost to the adjacent area can be reduced, it is almost unnecessary to supply water to the area to be treated during the drying period.

This latter feature is particularly important in areas where water control is required or where water is very low and must be consumed with maximum efficiency. In fact, according to the method of the present invention, the desired treatment effect can be obtained with almost no use of water as compared with the existing technology.

Also, by protecting from wind factors, the flow of water and chemicals can be reduced. Furthermore, erosion of a given area can also be reduced by using the present invention.

Further, according to the method of the present invention, sunlight is an essential element for the growth of vegetation and has a function of activating various agents used in the treatment process in some cases. , The natural elements of sunlight can be transmitted to the area to be treated.

[0022]

EXAMPLES In accordance with the present invention, the protective material is preferably a continuous sheet of one-piece "open" weave thermoplastic material, which continuous sheet is conventional in the art. Appropriate additives such as UV stabilizers, extenders and antioxidants can be used. A feature of the protective material according to the present invention is that it has the property of allowing moisture to permeate when the water pressure received during rainfall acts or when it is wet with water using a hose, and at the same time, it does not volatilize moisture, and It has the property of being able to hold a large amount of water below. Similarly, the protective cover of the present invention has the property that it is permeable to the atmosphere at standard atmospheric pressure, thus allowing the protective cover to "breath", while at the same time
Abnormal atmospheric conditions, such as atmospheric wind, have the property that they cannot penetrate through the protective cover at all. Finally, the protective cover of the invention is characterized in that the plastic material of which it is transparent is transparent and allows sunlight to pass through it without being unduly absorbed or reflected by the protective cover. ing.

In a particularly preferred form of the protective cover of the present invention, although the protective cover is formed of a lightweight thermoplastic material made in the form of an open mesh weave, a layer of thermoplastic material is evident in the layer. Forming a substantially uniform protective layer having no special openings (that is, holes). With this arrangement, the strips of material forming the layer of mesh weave of thermoplastic material are at least partially separable from each other. Thus, a slit is formed between adjacent strips to allow water to pass through the slit, but a large amount of water will enter the slit, as in the case of an open slot through the material facing each other. Intrusion is prevented.

To form the material used in the method of the present invention, the woven sheet material is made of intersecting strips of material forming a "woven" structure, and in a particularly preferred embodiment, the reinforcing material (the reinforcing material is The scrim structure is formed by using an irregular pattern). The scrim structure functions to impart one or more properties to the material, such as UV filtering.

The interlaced strips of plastic material may be in the width range of 1 mm to 0.5 cm or more. Although the strips preferably form intersections, the layers of the strips that do not overlap each other are arranged in opposite directions (preferably right angles). Only one of the longitudinal or transverse strips is required, although it is not necessary for the bidirectional cross strips of woven material to be arranged adjacent to each other so as to form individual continuous layers of strips. Should be adjacent to other strips in the same direction so that a generally continuous surface or layer is formed with no apparent holes. In this way, one embodiment of the present invention utilizes adjacent first direction strips to form a continuous layer while spacing strips in the other direction to provide a double layer effect in an area. And the effectiveness of the slit between the adjacent layers is further reduced. In another embodiment of the invention, the lateral strips and the longitudinal strips are spaced adjacent to each other to form a continuous top and bottom surface. Once again, the reinforcing layer can be provided in various forms of continuous or discontinuous strips, or lengths of material can be separately superposed or interwoven. Reinforcing layer (preferably scrim structure)
Is the total slit availabilty of the material.
ity) should not be reduced to close all slit holes between adjacent strands, but to reduce slit effectiveness to obtain various characteristics of woven materials. Can be configured to. The scrim reinforcement is preferably shaped to create relatively large irregularly shaped holes, ie, relatively large open areas of scrim material.

[0026]

Therefore, although the main subject matter of the present invention is a material that does not have any easily visible openings between the materials forming the woven structure, it is subjected to pressure from, for example, rainfall. The use of a material in which the woven structure is formed by individual strips which are separated within a certain limit from adjacent strips. This requirement allows the material of the invention to be placed on a substrate, such as the ground found in hillsides or sloped areas, to allow rain to flow and not to penetrate the sheet material. Further, since the sheet material has an apparent continuity, the wind is also deflected, so that the volatilization of the chemical agent used for the treatment can be reduced.

The thickness of the material used in the method of the present invention may be, for example, 1 mil to about 5 if desired.
A relatively thin thickness of 6 mils (about 1.3-1.5 mm) or more can be achieved. Further, the scrim material can be similarly thinned to use a light weight material as a whole. Depending on the given area of application, it may be preferable to provide a lip around the sheet material to provide a unitary product. Also, if desired, the scrim material may be joined to the mesh woven material by fusion bonding or other methods.

It will be appreciated that various modifications can be made to the above example without departing from the spirit and scope of the invention.

Claims (10)

[Claims] 1. A method of environmental protection suitable for reducing the environmental impact of a treatment agent on a location, the flexible area being provided with a region to be protected, light-transmissive and permeable to air and moisture. A protective layer made of a conductive material is laid in the region, and when the protective layer is in a flat state, a plurality of slits spaced from each other that can be deformed under the influence of moisture though there are substantially no opening holes are provided. An environment characterized by being provided with a sheet material of a fixed length, fixing the protective layer so as to be removable to the area, and removing the protective layer when protection is no longer required How to protect. 2. The thermoplastic material comprising a plurality of layers of thermoplastic material having an open mesh weave, the layers being substantially flat with no open pores when in the flat state. The method of claim 1, wherein the method comprises forming a substantially uniform protective layer having a plurality of spaced slits formed by intersecting strands of opposing layers of. 3. The location to be protected is treated with one or more agents prior to the laying of the protective layer, the protective layer spilling a large amount of the agent into an adjacent area around the location. 3. The method of claim 2, wherein the drug is held in place for a sufficiently long period of time so that the location can be treated in a non-intrusive manner. 4. The method of claim 2, wherein the protective layer comprises a transparent layer of protective material. 5. The protective layer is formed of an open mesh weave of thermoplastic material, the open mesh weave of thermoplastic material forming a substantially closed condition when in a flat condition. An open mesh weave comprising the thermoplastic material, the open mesh weave comprising a plurality of slits formed by the intersecting strands of the open mesh weave, the moisture pressure against the thermoplastic material. Method according to claim 2, characterized in that it allows moisture to pass through when is active. 6. A method for manufacturing a protective layer laid in a region to be protected, wherein a plurality of supply rolls of protective material are provided, and a protective material of a predetermined length in a sheet form is supplied from each of these rolls. A length of protective material has a predetermined width and a predetermined length, and opposing layers of protective material of a predetermined length are arranged next to each other at their at least one lateral edge, The juxtaposed lateral edges of the length of sheet material are folded to form a four layer thickness, and the folded lateral edges are stitched at about 1.25 to 3.25 stitches per cm. A method for manufacturing a protective layer, which comprises sewing. 7. The thermoplastic material, wherein the protective material comprises a plurality of layers of open mesh woven thermoplastic material, the layers being substantially free of open pores when in a flat condition. 7. The method according to claim 6, wherein a substantially uniform protective layer having a plurality of slits spaced from each other formed by the crossed strands of the opposing layers is formed. 8. The manufacturing method according to claim 6, wherein the protective layer includes a transparent layer made of a protective material. 9. A cross strand of thermoplastic material, wherein the protective layer is formed of an open mesh weave of thermoplastic material, the open mesh weave forming a substantially closed condition when in a flat condition. An open mesh weave comprising the thermoplastic material, the open mesh weave comprising a plurality of slits formed by the intersecting strands of the open mesh weave, the moisture pressure against the thermoplastic material. 7. The manufacturing method according to claim 6, wherein water can be passed through when the above-mentioned works. 10. The thermoplastic material comprises a layer of scrim material associated with the thermoplastic material, the layer of scrim material having an open network. The method described in.