JP2023041589A - Weed proof sheet, weed proof sheet set and fixing method of weed proof sheet - Google Patents

Abstract

To provide a weed proof sheet capable of solving problems that, for example, when weed proof sheets are adhered by an adhesive layer, and fixed by a pile-shaped fixture such as a nail, weed sometimes grows from a side of the fixture.SOLUTION: There is provided a weed proof sheet comprising: a light blocking sheet body; and an adhesive layer provided on a rear face of the sheet body. The adhesive layer has light blocking properties. If the weed proof sheet is pierced to a ground surface and fixed, since the adhesive layer having light blocking properties tightly contacts the surrounding of a pile shaped fixture, even there is formed a gap between the sheet and the pile shaped fixture due to long term deterioration, sunlight does not reach the ground surface and it is possible to suppress grow of the weed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a weed control sheet that suppresses the growth of weeds.

Weeds will grow over time on the exposed soil that has not been treated with asphalt paving or tile laying, even if landfilling and digging are performed. This is said to be due to the fact that plants called weeds have the characteristic of scattering a large amount of seeds and growing as long as there is sunlight. In addition, once weeds grow, even if the above-ground parts are cut, they will revive as many times as long as they have roots. Therefore, in areas where weeds do not want to grow, it is necessary to periodically remove weeds and dig up the soil, and maintaining a weed-free state is troublesome.

The weed control sheet was developed to save this trouble, and suppresses the growth of weeds by blocking the sunlight necessary for the growth of weeds. However, just as weeds can grow through even the slightest cracks in concrete blocks, weeds can grow through gaps where sunlight leaks through the gaps in the installation of anti-grass sheets. Therefore, the weed control sheet must be laid without gaps. However, even if the weed control sheet is intended to be laid without gaps, weeds will find gaps and grow out of the weed control sheet.

One of the reasons why weeds grow despite the weed control sheets being laid is that sunlight leaks to the ground through the gaps between the weed control sheets, and the above-ground parts extend through the gaps.

In Patent Document 1, an adhesive layer is provided along one side edge in the width direction of one side of a flexible strip-shaped sheet body, and a plurality of fixing holes are provided at predetermined positions of the sheet body to prevent weeds. The sheet A is formed, and the weed control sheet is laid on the construction surface with the adhesive layer positioned on the upper surface, and the weed control sheet A (A1) is fixed by driving fixtures into a plurality of fixing holes. Next, one side edge of the later weed-control sheet A (A2) is superimposed on the upper surface of the adhesive layer of the former weed-control sheet A (A1) and laminated together, and the latter weed-control sheet A including the overlapped portion is laminated. (A2) discloses a weed control sheet in which fasteners are driven into respective fixing holes.

Japanese Patent Application Laid-Open No. 2004-033032

In Patent Document 1, an adhesive layer is provided along one side edge of the weed-control sheet, and adjacent weed-control sheets are bonded together at the edges. Therefore, it is possible to leave no gaps between the weed control sheets when they are laid. However, in Patent Document 1, the weed control sheet itself is provided with fixing holes, through which weeds extend onto the surface of the weed control sheet. Furthermore, when the sheets are piled up and fixed by nailing in a portion without fixing holes, there is a problem that weeds grow in search of light in the slight gap between the nailed sheet and the nail. It was thought that driving nails or anchor pins into the weed-proof sheet would tear the weed-proof sheet, and weeds would grow toward the light leaking through the torn gaps.

The present invention has been conceived in view of the above problems, and even if the weed-proof sheets are fixed individually or in piles with pile-shaped fixtures, weeds grow from the gaps between the weed-proof sheets and the pile-shaped fixtures. To provide a weed control sheet that does not come off.

More specifically, the weed control sheet according to the present invention is
A light-shielding sheet body,
Having an adhesive layer provided on the back surface of the sheet body,
The adhesive layer is characterized by having a light shielding property.

Further, the method for fixing the weed control sheet according to the present invention includes:
A method for fixing a plurality of weed control sheets having an adhesive layer on the edge, comprising:
A step of fixing the edge of the weed control sheet to the ground with a stake-shaped fixture;
A step of pressing and pasting the adhesive layer of another weed control sheet provided with an adhesive layer on the edge so as to overlap the fixed portion is provided.

Also provided is a weed-control sheet set comprising the above-mentioned weed-control sheet and a stake-like fixture having a head having the same color as or a similar color to the surface of the weed-control sheet.

In the weed control sheet according to the present invention, the adhesive layer itself has a light-shielding property. Therefore, even if a gap is formed between the sheet body and the stake-shaped fixture due to the application of stress due to aging, the adhesive layer remains in the shape of a pile. Since the adhesive layer itself is present around the fixture and blocks light, weeds do not grow out from the fixed part when the weed-proof sheet is stuck to the ground with the stake-shaped fixture.

Further, by providing an adhesive layer on the edge of the weed-control sheet, the strength of the weed-control sheet itself is increased, and a weed-control sheet that is hard to tear and peel off can be provided.

In addition, if the base material has cushioning properties, even if the surface to be adhered has unevenness, it can exert a suitable adhesive force. Furthermore, when the adhesive layer is a double-sided tape having adhesive layers on both sides of the base material, the adhesive force between the double-sided tape and the weed-control sheet can be increased even if the weed-control sheet body has unevenness. It is possible to increase the degree of freedom in processing the main body of the weed control sheet.

In addition, even when weed-proof sheets are adhered to each other, light does not leak from the adhesive layer to the ground side, and weeds can be prevented from spreading.

In addition, the fixing method of the weed-control sheet according to the present invention can be used during laying because the weed-control sheet is stuck to the ground and then the stuck part is covered with the adhesive layer of another weed-control sheet. can be hidden.

In addition, since the weed-control sheet set according to the present invention includes a pile-shaped fixing tool whose head color is matched with the color of the surface of the weed-control sheet, the head of the pile-shaped fixture is used when fixing the weed-control sheet. Even if it remains on the surface of the weed control sheet, it can be made inconspicuous.

1 is a diagram showing the configuration of a weed control sheet according to the present invention; FIG. Fig. 3 is a cross-sectional view of the edge of the weed control sheet; Fig. 3(a) is a roll-shaped sheet, Fig. 3(b) is a tape-shaped sheet, and Fig. 3(c) is a patch-shaped weed control sheet. FIG. 4(a) shows a cross-sectional view of the weed-control sheet according to the present invention fixed to the ground with a stake-shaped fixture, and FIG. 4(b) shows a cross-sectional state after aging. . FIG. 5(a) is a diagram showing an adhesion state when a foreign object is bitten by a substrate having a cushioning property, and FIG. 5(b) is a substrate having no cushioning property. 4 is a flowchart showing a procedure for laying a weed control sheet. Fig. 10 is a flow chart showing another means for laying the weed control sheet.

The weed-control sheet, the stake-shaped fixture, and the method of fixing the weed-control sheet according to the present invention will be described below with reference to drawings and examples. In addition, the following description illustrates one embodiment and one example of the present invention, and the present invention is not limited to the following description. The following description can be modified without departing from the spirit of the invention.

<Structure of anti-grass sheet>
FIG. 1 shows the structure of the weed control sheet according to the present invention. A weed control sheet 1 according to the present invention has a sheet body 10 and an adhesive layer 12 . The sheet body 10 is a sheet having light shielding properties and water permeability. The size and shape of the seat body 10 are not particularly limited. That is, the size and shape are not limited to those conceived by terms such as sheet-like, roll-like, tape-like, and patch-like (seal-like). The sheet body 10 is used in a sheet state when used. However, it may be provided in roll form at the time of sale.

Further, the sheet body 10 is not provided with a through-hole in order to have a light-shielding property. For the sheet body 10, light shielding properties are necessary for suppressing the growth of weeds, and water permeability is necessary for allowing the ground to absorb moisture. For example, if there is no water permeability, rainwater will not permeate the ground when it rains, which may affect the growth of other trees in the vicinity where the anti-grass sheet is laid. In addition, if rainwater does not permeate the ground over a large area, there is a risk of flooding.

Therefore, the seat body 10 is often made of nonwoven fabric or woven fabric. However, this does not exclude completely impermeable materials such as vinyl sheets or rubberized textile sheets. This is because when the weed control sheet is laid on a small area, it may not be permeable.

The seat body 10 may have both sides. Here, the back surface 10r refers to the surface that is expected to be on the ground side when laid, and the front surface 10s refers to the surface on the opposite side. The front and back may have different materials and patterns. In addition, it is not necessary to distinguish between the front and back because there is no difference between the two sides. Further, in this specification, "upper" refers to a direction away from the center of the sheet body 10 in the thickness direction, and "lower" refers to a direction from the outside of the sheet body 10 toward the surface 10s (or the back surface 10r) of the sheet body 10. Say.

Since the sheet body 10 is in a sheet state when used, it has an edge portion 10t. The edge portion 10t is a region extending from the end surface 10e of the sheet body 10 toward the center of the sheet body 10 by a predetermined length. In the edge portion 10t, the portion from the end surface 10e toward the center of the sheet body 10 is called the width 10tw, and the direction from one end surface 10e to the other end surface 10e is called the length 10tv. The predetermined length, which is the width of the edge portion 10t, has a width 10tw of about 1 cm to 20 cm. If the width 10tw of the edge portion 10t cannot be secured for a predetermined length, the width 10tw may be 1/4 from the end face 10e to the end face 10e in the width 10tw direction.

Although FIG. 1 shows two edge portions 10t and two end surfaces 10e, the sheet body 10 has four end surfaces 10e. There are places. In addition, although the edge portion 10t is strip-shaped in FIG. 1, the edge portion 10t may be curved.

The adhesive layer 12 is provided on at least one edge portion 10 t of the sheet body 10 . At this time, it may be provided on either the front surface 10s or the rear surface 10r. Moreover, you may provide in both. At this time, it is desirable that the edge portion 10t is formed along the end surface 10e of the sheet body 10 in the lengthwise direction from one end to the other end. This is because there is no unbonded portion at the edge 10t when bonding to another weed control sheet 1 . However, this does not exclude the case where the sheet body 10 is cut in the middle or the adhesive layer 12 is not provided at the corner portion of the sheet body 10 . Also, the adhesive layer 12 may be provided on the entire surface 10 s or the back surface 10 r of the sheet body 10 .

The adhesive layer 12 may be provided on at least one edge portion 10 t , and thus may be provided on a plurality of edge portions 10 t or on the entire circumference of the sheet body 10 . In addition, one edge 10t may be part of the edge 10t. If the seat body 10 is round or elliptical with no corners, it can be said that there is only one edge 10t. In such a case, the adhesive layer 12 may be part of the edge 10t.

When the adhesive layer 12 is provided only on the edge 10t of the sheet body 10 (when not provided on the entire front surface 10s or the back surface 10r of the sheet body 10), the width 12w of the adhesive layer 12 is preferably about 5 cm to 15 cm, and more It is preferably about 8 cm to 12 cm. The sheet bodies 10 can be easily adhered when they are overlapped and adhered to each other, and even if the adhesion of the sheet bodies 10 fails and wrinkles appear in the adhered portion, they can be adhered without any gaps with such a width. can. The adhesive layer 12 is basically provided on the rear surface 10r (the surface facing the ground) of the weed control sheet 1 of the present invention. However, the adhesive layer 12 may be provided on the surface 10s.

FIG. 2 shows a cross-sectional view of the edge portion 10t of the weed control sheet 1. As shown in FIG. The adhesive layer 12 is provided on the back surface 10 r of the sheet body 10 . In FIG. 2, the upper side of the paper surface is the ground side. A first adhesive layer 14 , a base material 16 , a second adhesive layer 18 and a release layer 20 are arranged on the upper side of the sheet body 10 . Also, the first adhesive layer 14, the base material 16, and the second adhesive layer 18 are in direct contact with each other. The first adhesive layer 14 is in direct contact with the back surface 10 r of the sheet body 10 . Note that it is not excluded that another layer is formed between the release layer 20 and the adhesive layer on the uppermost surface of the adhesive layer 12 (here, the second adhesive layer 18).

The first adhesive layer 14 and the second adhesive layer 18 are adhesive materials. For example, a commonly used adhesive can be used as the adhesive layer. Examples thereof include rubber-based adhesives such as butyl rubber, isoprene rubber, and silicone rubber, asphalt-based adhesives, acrylic-based adhesives, and olefin-based adhesives. These adhesives can be used individually or in combination of 2 or more types.

The base material 16 provides strength to the adhesive layer 12 . A fiber structure or a polymer sheet can be preferably used. In particular, a black-colored polymer sheet is preferable because it has strength and is resistant to tearing. When imparting cushioning properties to the base material 16, an ethylene propylene diene rubber-based material, a foam of a resin material such as polyethylene or polyurethane, or the like is preferably used. Since these materials have elasticity in the thickness direction, they can be made to conform to the unevenness of the surface to be adhered. As a result, the adhesion area to the adherend surface can be increased, and strong adhesion can be achieved. Note that the adhesive layer 12 may be composed of only one adhesive layer. That is, a configuration may be adopted in which an adhesive layer is formed on the back surface 10r of the sheet body 10, and the release layer 20 is arranged thereon.

The peeling layer 20 is arranged so as to be peelable from the adhesive layer on the uppermost surface of the adhesive layer 12 . When the release layer 20 is peeled off, the uppermost adhesive layer (the second adhesive layer 18 in the case of FIG. 2) does not adhere to the release layer 20. - 特許庁Moreover, the release layer 20 itself may be a fiber structure having strength or a polymer sheet. As will be described later, the release layer 20 may be left intact and fixed to the ground with stake-like fixtures 30 (see FIG. 3). At this time, the strength of the edge portion 10t of the sheet body 10 can be increased to avoid the problem that the sheet body 10 is torn from the edge. Moreover, the release layer 20 may have a light shielding property. In addition, when the weed-proof sheet 1 is supplied in the form of a tape, the release layer 20 may be omitted.

In the weed control sheet 1 according to the present invention, the adhesive layer 12 is imparted with a light shielding property. That is, when the adhesive layer 12 is composed of only one adhesive layer, the adhesive layer has a light shielding property. Moreover, as in the case of FIG. 2, when the adhesive layer and the substrate are formed, at least either the adhesive layer or the substrate has a light shielding property. As shown in FIG. 2, even when the two adhesive layers (the first adhesive layer 14 and the second adhesive layer 18) and one base material 16 are configured, at least one of the two adhesive layers and one base material One layer has a light shielding property.

In particular, if the substrate has a light-shielding property, the adhesive layer may have transparency. In order to impart a light-shielding property to the adhesive layer, it is necessary to incorporate a light-shielding agent such as a filler. However, when the filler is added to the adhesive layer, the adhesiveness of the adhesive layer itself is lowered. On the other hand, if a transparent adhesive layer is arranged on the front and back of a light-shielding base material, the adhesive layer does not need to contain a filler, and the light-shielding property and adhesiveness of the adhesive layer can be ensured.

FIG. 3 illustrates some of the variations of the weed control sheet 1 that can be provided by the present invention. FIG. 3(a) shows the weed control sheet 1 in roll form. An adhesive layer 12 is provided on the back surface 10r of the sheet body 10, and a long sheet having a release layer 20 provided on the upper side of the adhesive layer 12 is wound around a roll. It should be noted that the adhesive layer 12 is provided on the entire surface of the back surface 10r of the sheet body 10. FIG.

FIG. 3(b) shows the case where it is provided as a tape. The only difference between rolls and tapes is size. When provided in a tape form, the release layer 20 may be omitted. It can be used while being unwound like a normal adhesive tape. In particular, it can be used when the weed control sheets 1 are adhered to each other. It is also used for repairing minor tears in the seat body 10 .

FIG. 3(c) shows the case where it is provided in patch form. An adhesive layer 12 is provided on the back surface 10 r of the sheet body 10 and covered with a release layer 20 . When used, the release layer 20 is peeled off. The present invention can be provided at least in the form shown in FIG. 3 as well as in single sheets. 3 shows the case where the adhesive layer 12 is provided on the entire back surface 10r of the sheet body 10, the adhesive layer 12 may be provided only on the edge portion 10t of the sheet body 10. FIG.

<Action of weed control sheet>
FIG. 4(a) shows a cross-sectional view when the weed-control sheet 1 according to the present invention is fixed to the ground with a stake-like fixture 30. FIG. Here, the ground may be blocks, asphalt or walls. The stake-shaped fixture 30 may be a fixture with a sharp tip. Specifically, it may be not only a rod-shaped object such as an underpin or a nail, but also an object having a plurality of tips such as a staple. That is, it may be appropriately selected according to the ground.

The stake-like fixture 30 is drilled into the ground through the sheet body 10 and the adhesive layer 12 and the release layer 20 . At this time, since the adhesive layer 12 includes the adhesive layers (14, 18), it adheres to the periphery of the stake-shaped fixture 30. As shown in FIG. The first adhesive layer 14 and the second adhesive layer 18 in the adhesive layer 12 also adhere the base material 16 around the stake-shaped fixture 30 .

FIG. 4(b) shows a cross-sectional state after aging. The surface of the sheet body 10 of the weed control sheet 1 is pulled by the wind or the like, and a gap 40 is formed around the stake-shaped fixture 30 . At this time, the adhesive layer 12 (the first adhesive layer 14 (see FIG. 2)) may be exposed. In this state, light may leak to the ground through the adhesive layer 12 . This is the reason why weeds may grow over time from the sides of the stake-like fixtures for fixing the weed control sheet.

However, in the weed-control sheet 1 according to the present invention, the light-shielding base material 16 (see FIG. 2) is adhered to the stake-shaped fixture 30 from above and below by the light-shielding adhesive layer, so that the gap 40 is formed. light does not reach the ground through the gap 40 formed around the stake-like fixture 30. - 特許庁At this time, it is desirable that all of the first adhesive layer 14, the second adhesive layer 18, and the base material 16 have light shielding properties, but at least one layer may have light shielding properties. Moreover, when the adhesive layer 12 is composed only of an adhesive layer, the adhesive layer must have a light-shielding property.

Please refer to FIG. FIG. 5 shows a case where the adhesive layer 12 is composed of the first adhesive layer 14, the second adhesive layer 18, and the substrate 16, and is directly adhered to the surface to be adhered (here, the ground). FIG. 5(a) shows a case where the base material 16 has cushioning properties, and FIG. 5(b) shows a case where the base material 16 does not have cushioning properties.

Referring to FIG. 5(b), if the substrate 16 does not have a cushioning property, the adhesive layer 12 around the foreign matter 50 is lifted when the foreign matter 50 on the surface to be adhered is bitten during adhesion. In such a situation, the adhesion area is reduced, and the adhesive force between the weed control sheet 1 and the adherend surface is reduced.

On the other hand, if the base material 16 has a cushioning property as shown in FIG. 5A, the base material 16 at the portion of the foreign object 50 is deformed, so that the adhesive surface can be formed even around the foreign object 50 . As a result, it is possible to suppress the deterioration of the adhesive force between the weed-proof sheet 1 and the surface to be adhered (ground).

The same applies to the adhesion between the sheet body 10 and the adhesive layer 12 from the viewpoint of suppressing the deterioration of the adhesion force to the irregularities on the surface to be adhered. For example, in order to increase the strength of the sheet body 10, the sheet body 10 contains fibers or the like, and if this causes unevenness on the surface of the sheet body 10, the sheet body 10 will have unevenness when viewed from the adhesive layer 12. It becomes the surface to be adhered. However, if the base material 16 has cushioning properties, it can be suitably adhered to such a seat body 10 as well.

<Weed prevention sheet set>
Please refer to FIG. 4 again. The head 30a of the stake-shaped fixture 30 is preferably the same color as the weed control sheet 1 or a similar color. This is because the head 30a of the stake-shaped fixture 30 can be hidden in the color of the surface 10s of the weed-proof sheet 1 and made inconspicuous. Therefore, when selling the weed-control sheet 1, we provide a weed-control sheet set in which the weed-control sheet 1 and the pile-shaped fixture 30 whose head 30a is the same color as or similar to the color of the surface 10s of the weed-control sheet 1 are provided. can do. Here, to make the same color or a similar color means that the head 30a of the pile-shaped fixture 30 is painted in the same color or a similar color as the surface 10s of the weed-proof sheet 1, and the weed-proof sheet 1 itself is made into a pile-like color. The fixture 30 may be cut along the head 30a and applied to the head 30a.

<Variation of Usage>
FIG. 6 illustrates the state of the joint portion when the weed control sheets 1 according to the present invention are joined together for use. First, a weed control sheet 1A is laid on a predetermined position on the ground (Fig. 6(a)). Next, the edge portion 10t of the weed-control sheet 1B having the adhesive layer 12B applied thereto is overlaid on the edge portion 10t of the weed-control sheet 1A (FIG. 6(b)). Then, the weed-proof sheet 1A and the weed-proof sheet 1B are adhered while peeling off the release layer 20B of the weed-proof sheet 1B (FIG. 6(c)). Then, the adhesion area where the two weed control sheets 1A and 1B are adhered is fixed to the ground with a stake-shaped fixture 30 (Fig. 6(d)).

With this configuration, two layers (12A, 12B) of the adhesive layer 12 having a light shielding property are formed around the stake-shaped fixture 30. Even if a gap is formed around the tool 30, the light-shielding adhesive layer blocks the light, so that weeds can be prevented from spreading.

FIG. 7 shows another installation example of the weed control sheet 1 . In FIG. 7, first, a weed control sheet 1A is laid on the ground. Next, the edge portion 10t on which the adhesive layer 12A is arranged is fixed with a stake-like fixture 30 (FIG. 7(a)). After that, the edge portion 10t of the weed-control sheet 1B having the adhesive layer 12B is placed on the fixed portion of the weed-control sheet 1A (FIG. 7(b)). Then, the weed-proof sheet 1B is attached to the weed-proof sheet 1A while peeling off the release layer 20B (FIG. 7(c)).

With this configuration, since the part where the weed-control sheet 1A is fixed by the stake-like fixture 30 is covered with the other weed-control sheet 1B, there is a gap between the fixed stake-like fixture 30 and the weed-control sheet 1A in the first place. Light does not leak from the gap 40. - 特許庁Therefore, it is possible to avoid the phenomenon of weeds growing out of the side portions of the stake-like fixture 30 . The weed-control sheet 1A may not be the weed-control sheet 1 of the present invention. The weed-control sheet 1A side and the weed-control sheet 1B can be adhered by the adhesive layer 12B of the weed-control sheet 1B. This is because the adhesive layer 12B of 1 shields the light.

The weed-control sheet of the present invention can be suitably used to prevent the growth of weeds.

1 Weed control sheet 10 Sheet main body 10s (Sheet main body) Front surface 10r (Sheet main body) Back surface 10t (Sheet main body) Edge 10e (Sheet main body) End surface 10tw (Sheet main body) Width 10tv (Sheet main body) Length Sa 12 Adhesive layer 12w Width (of adhesive layer) 14 First adhesive layer 16 Base material 18 Second adhesive layer 20 Release layer 30 Pile-shaped fixture 30a (Pile-shaped fixture) Head 40 Gap 50 Foreign matter

Claims (8)

A light-shielding sheet body,
Having an adhesive layer provided on the back surface of the sheet body,
The weed control sheet, wherein the adhesive layer has a light shielding property. The adhesive layer is
2. The weed control sheet according to claim 1, wherein the weed control sheet is provided at an edge of at least one side of the sheet body. The adhesive layer includes a first adhesive layer in direct contact with the sheet body;
a base material in direct contact with the first adhesive layer;
Having a second adhesive layer in direct contact with the base material,
3. The weed control sheet according to claim 1, wherein at least one of said first adhesive layer, said base material and said second adhesive layer has a light shielding property. The weed control sheet according to any one of claims 1 to 3, wherein the base material has cushioning properties. A weed control sheet according to any one of claims 1 to 4, wherein a release layer is arranged above the adhesive layer. 6. A weed control sheet according to claim 5, wherein said peeling layer also has a light shielding property. a weed control sheet according to any one of claims 1 to 6;
A weed-control sheet set, comprising a stake-like fixing member having a head that is the same color as or similar to the surface of the weed-control sheet. A method for fixing a plurality of weed control sheets having an adhesive layer on the edge, comprising:
A step of fixing the edge of the weed control sheet to the ground with a stake-shaped fixture;
A method for fixing a weed-control sheet, comprising a step of pressing and attaching an adhesive layer of the weed-control sheet according to any one of claims 1 to 6 so as to overlap the fixed portion. .

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