JP2005210906A - Weed suppressing tape and method for suppressing weed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weed suppressing material directly applicable even when a gap between joints or cracks is slender or the joints or cracks are filled with earth and sand and having excellent application efficiency, weather and abrasion resistances, and to provide a method for suppressing weeds. <P>SOLUTION: A weed suppressing tape is prepared by providing an acrylic pressure-sensitive adhesive layer having 0.3-2.0 mm thickness on the undersurface of a surface layer part composed of a resin film having 0.05-0.7 mm thickness and forming a release sheet on the top surface of the surface layer part or providing a base layer part having 0.3-2.0 mm thickness and composed of an elastic material such as synthetic rubber on the undersurface of the surface layer part composed of the resin film having 0.05-0.7 mm thickness, further forming the adhesive layer on the undersurface of the base layer part and providing the release sheet on the top surface of the surface layer part. The resultant weed suppressing tape is applied onto the joints or cracks to remove the release sheet after the application. Weed suppressing effects last long with the excellent application efficiency and further with the weather and abrasion resistances. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a weed prevention tape, and joints between the pavement material and other structures, joints between the structures, joints between the pavement materials, or cracks generated on the pavement material or the surface of the structure using the tape. The present invention relates to a method for suppressing the growth of weeds.

  At the boundary between asphalt pavement, concrete pavement roads and sidewalks for pedestrian traffic, road ancillary facilities such as drainage structures and concrete boundary blocks are installed. The road median strip uses concrete cast in the field and concrete blocks. Normally, joints in the cast-in-place concrete and joints between blocks are treated with cement mortar, but no special treatment is performed between the paved surface and the blocks.

  As an example, the boundary between the asphalt pavement surface and the structure part such as the side groove is usually not jointed, and since the thermal expansion coefficient of both is different, a gap occurs at the boundary part (joint) over time, Weeds may be generated when soil, sand, dust, or the like accumulates in the gap. A gap in which similar weeds can occur is likely to occur mainly at the boundary portion (joint) of the road pavement with the dissimilar material as described above. In addition, if there is a crack on the surface of the pavement or structure (concrete block, etc.) for some reason, weeds may occur at any location. As an example of normal road pavement, weeds may grow on joints and surface cracks such as bridges / pylon foundations, retaining walls, etc., and where weeds actually grow anywhere Can be observed.

  Naturally occurring weeds have strong growth and reproductive potential, and if left untreated, they will develop the underground stem and destroy the pavement itself. It leads to stay and is forced to cut. The harvesting work often relies on manual work, and the cost burden is large. In addition, when cutting only the above-ground part, there is a high probability that weeds will grow again, and after a certain period of time, mowing work is necessary again, increasing the management cost to maintain and maintain a good road environment. Yes.

  As these countermeasures, Japanese Patent Application Laid-Open No. 2002-154912 discloses a long sheet material that suppresses the generation of weeds. This is effective as a countermeasure for a place having a certain area, but is difficult to apply to the generation of weeds from joints and cracks targeted by the present invention.

  In addition, as a countermeasure against joints and cracks, there is a hot-melt type casting sealing material, but these have the disadvantage of costly construction and labor. Also, if there are no gaps in the joints, it is impossible to perform construction in advance, and if the earth and sand are clogged in the joints and cracks, the construction cannot be done without removing the earth and sand, so the construction efficiency is very poor. there were. For this reason, a low-cost, easy and effective weed growth control measure is desired.

  Japanese Patent Application Laid-Open No. 11-303040 discloses a technique in which the joint is covered with a separation sheet and further covered with an elastic cap seal. Since this requires the use of two components, a separation sheet and a cap seal, it takes a lot of work, and the separation sheet and the cap seal are not bonded, and only the both ends of the cap seal must be bonded to both sides of the joint. Construction is extremely difficult. Furthermore, the elastic cap seal (the material is synthetic rubber or the like) has no weather resistance and wear resistance, and it is difficult to maintain the effect for a long period of time.

Japanese Patent Laid-Open No. 10-183555 discloses a weedproof mat having a T-shaped cross section and an elongated belt shape. Because it is made of an elastic material such as synthetic rubber, it does not have weather resistance or wear resistance, but it has a feature that the herbicidal effect lasts relatively long because it is constructed by inserting the legs formed vertically in the center of the bottom surface into the joint. However, if there are no gaps in the joints, it is impossible to perform construction in advance, and when the earth and sand are clogged in the joints and cracks, the construction cannot be done without removing the earth and sand, so the construction efficiency is very poor. there were.
JP 2002-154912 A JP-A-11-303040 Japanese Patent Laid-Open No. 10-183555

  The present invention can be applied as it is even when there are no gaps in the joints, when the joints and cracks are narrow, even when the joints and cracks are filled with earth and sand, and has excellent construction efficiency, weather resistance, and wear resistance. Therefore, it is an object of the present invention to develop a weed suppression material having a long-lasting weed suppression effect and a weed suppression method for joints and cracks.

  (Configuration 1) In the present invention, an acrylic pressure-sensitive adhesive layer having a thickness of 0.3 to 2.0 mm is provided on the lower surface of a surface layer portion made of a resin film having a thickness of 0.05 to 0.2 mm, and the surface layer portion is provided. It is a weed prevention tape characterized by providing a peeling sheet on the upper surface of the.

  (Configuration 2) In the present invention, a base layer portion having a thickness of 0.3 to 2.0 mm made of an elastic material such as a synthetic rubber is formed on the lower surface of the surface layer portion made of a resin film having a thickness of 0.05 to 0.2 mm. The weed prevention tape is characterized in that it is further provided with an adhesive layer on the lower surface thereof and a release sheet on the upper surface of the surface layer portion.

  (Configuration 3) The present invention is the weed suppression tape according to any one of Configurations 1 and 2, wherein the surface layer portion is an ionomer resin sheet.

  (Configuration 4) In the present invention, in the weed prevention tape according to Configuration 1, 2, or 3, at least one of the surface layer portion, the acrylic pressure-sensitive adhesive layer, or the base layer portion is a light reflecting material and / or a fluorescent material. It is a weed prevention tape characterized by including a material.

  (Configuration 5) Further, the present invention covers the joints between the pavement material and other structures, joints between the structures, joints between the pavement materials, or cracks generated on the surface of the pavement material or the structure. A weed suppression method for joints or cracks, characterized in that the weed suppression tape of any one of -4 is affixed.

  The weed suppression tape of the present invention prevents weed seeds from entering joints and cracks, blocks sunlight and prevents germination and growth, and thus exerts a weed suppression effect. The acrylic pressure-sensitive adhesive or the base layer (elastic material sheet such as synthetic rubber, soft plastic, foamed plastic, etc.) is an elastic body, so it absorbs irregularities on the application surface and expands pavement materials and structures due to temperature changes. Follows contraction, uneven ground subsidence, shaking during earthquakes, and is difficult to peel off. When the surface layer portion is made of an ionomer resin, it is excellent in unevenness followability, weather resistance, and abrasion resistance, and does not deteriorate even after a long period after construction, and the herbicidal deterrent effect lasts long.

  Since the lower surface of the tape has adhesiveness, there is no need to apply an adhesive on site. Since the release sheet is affixed to the surface layer portion, the base layer portion and the surface layer portion do not stick together even if rolled up, and can be supplied in a ring-shaped state, so that storage and construction are easy. .

  When at least one of the surface layer, acrylic pressure-sensitive adhesive layer, or base layer is mixed with various light reflectors and fluorescent materials such as retroreflective material, the design is improved and night traffic distance is secured. Can be achieved.

  By applying the tape of the present invention so as to close and cover the joints and cracks, weeds can be easily prevented from occurring in the joints and cracks. Adhesion becomes stronger and more reliable by applying a primer treatment to the part before applying the tape. When there are no gaps in the joints, when the joints or cracks are narrow, even when the joints or cracks are buried with earth and sand, the construction can be performed as it is, and the generation of weeds can be suppressed. Even if the joints and the width of the cracks are widened after the tape is applied, they follow the elasticity of the tape (particularly the elasticity of the acrylic pressure-sensitive adhesive layer or the base layer).

  The material of the base layer portion is not particularly limited as long as it is excellent in elasticity, but is preferably weather resistant and does not transmit light (which may be colored), for example, synthetic rubber such as butyl rubber, soft plastic, It can be a foamed plastic or the like. In order to ensure followability, a thickness of about 0.3 to 2.0 mm is appropriate.

  The surface layer part is desirably an ionomer sheet having excellent unevenness followability, weather resistance, and wear resistance. An ionomer (or ionomer) is obtained by crosslinking a copolymer of ethylene and acrylic acid (or methacrylic acid) with a metal ion. Usually, ionomer resins are translucent and semi-glossy, and are familiar with the surrounding landscape, but can also be colored. In the present invention, the ionomer includes those obtained by appropriately adding additives such as ultraviolet absorbers and weathering stabilizers to improve the characteristics of the product. Further, the ionomer of the present invention is usually preferably 100% (excluding additives), but also includes an olefin resin mixed with an ionomer of 30 to 99.9% by weight.

  The thickness of the surface layer is suitably about 0.05 to 0.7 mm. When various light reflecting materials / fluorescent materials are blended in the surface layer portion, various light reflecting materials / fluorescent materials may be kneaded into the resin film before molding, or various light reflecting materials / It is also possible to attach the fluorescent material by rolling or using an adhesive. When the surface layer portion is transparent or translucent, various light reflecting materials and fluorescent materials can be kneaded into the acrylic pressure-sensitive adhesive layer or the base layer portion. Various known substances (for example, aluminum powder) can be used as the light reflecting material, and various known phosphorescent materials can be used as the fluorescent material.

  The surface layer portion and the acrylic pressure-sensitive adhesive layer or the base layer portion can be integrated by, for example, extruding both at the same time and press-contacting both immediately after that.

  The release sheet is not particularly limited as long as it is non-tacky, and a known sheet such as a PET resin sheet can be used.

  FIG. 1 is an explanatory diagram of a weed prevention tape 1 according to an embodiment. The tape 1 has a width of 75 mm and an arbitrary length, and is supplied in a roll shape. It is composed of an acrylic pressure-sensitive adhesive layer 2, a surface layer portion 3, and a release sheet 4 in order from the lower side. The acrylic pressure-sensitive adhesive layer 2 has a thickness of 0.4 mm, and its lower surface (and side surfaces and upper surface) has adhesiveness when pressed. The surface layer 3 is an ionomer film having a thickness of about 0.1 mm, and the acrylic pressure-sensitive adhesive layer 2 and the surface layer 3 are integrated. The release sheet is a non-adhesive PET resin film.

  FIG. 2 is an explanatory diagram of a construction example of the weed prevention tape 1. In this case, the construction is performed on the joint 8 at the boundary between the paving material 6 (which may be asphalt or concrete) and the curb block 7 (structure).

  As a pretreatment step prior to construction, if weeds are already growing on the joints, weed cutting and removal work is essential. Although it is desirable to remove roots of weeds in each rhizome, it is necessary to remove at least the above-ground parts. In addition, it is desirable to sufficiently remove objects that interfere with work such as moss, dust, and dust. Of course, the removal method may be removal by manual work, but when the construction site covers a wide area, it takes manpower and time, so the efficiency is low. For this reason, all methods depending on the size, length, and other conditions of the construction site, such as weeding machines equipped with electric cutters, spraying of herbicides, spraying of high pressure water, incineration by flame, carbonization by high voltage current, etc. Take into account. The joint width after weed removal is desirably 6 mm or less at the maximum. Further, the joint 8 may be in a state where no gap is opened. Even if the gap is not open, weeds can be prevented in advance when a gap is created in the future.

  Next, in order to prevent the primer from adhering to a location other than the location where the tape 1 is applied, a masking tape 5 or the like is applied and a curing process is performed. This state is shown in the upper part of FIG. This process can be omitted when curing treatment is not required depending on the construction site.

  In order to ensure adhesion of the tape 1, a primer is applied to the surface to which the tape 1 is applied. The primer may be a conventionally known primer. The primer is applied by a conventionally known coating method such as brush coating or roller coating.

  After applying the primer and drying, the tape 1 is applied without peeling off the release sheet 4. By placing the tape 1 on the application part and pressing it from above, the lower surface of the acrylic pressure-sensitive adhesive layer exhibits adhesiveness and can be easily applied. After sticking, in order to smooth the tape surface and improve the adhesiveness to the adhesive surface, the holding sheet is appropriately pressed with a waste cloth and the release sheet 4 is peeled off and removed. This state is shown in the lower part of FIG.

  FIG. 3 is a cross-sectional view of a weed suppression tape 10 according to another embodiment. The tape 1 has a width of 75 mm and an arbitrary length, and is supplied in a roll shape. The adhesive layer 11, the base layer portion 12, the surface layer portion 13, and the release sheet 14 are sequentially formed from the lower side. Although the adhesive in the adhesive layer 11 is arbitrary, for example, an acrylic resin-based, epoxy resin-based adhesive or the like excellent in weather resistance is preferable. The base layer portion 12 is butyl rubber having a thickness of 0.4 mm. The surface layer portion 13 is an ionomer film having a thickness of about 0.1 mm, and the adhesive layer 11, the base layer portion 12, and the surface layer portion 13 are completely integrated. The release sheet is a non-adhesive PET resin.

  The pavement material targeted by the present invention includes block material pavement made of inorganic materials such as concrete pavement, asphalt pavement, interlocking, etc., regardless of the site such as roadways, sidewalks, parks and open spaces. The structure targeted by the present invention is a road side gutter, curbstone made of concrete block material, a road median strip made of cast-in-place concrete or concrete block, planted with cast-in-place concrete or block material on the sidewalk, laid around the pavement.・ Contains a flower bed part. In addition to the surroundings of ordinary road pavements, the target is to suppress weeds that flourish in joints and cracks in every place, such as the foundation roadbed of steel towers and bridges, and retaining walls.

It is explanatory drawing of the weed suppression tape 1 of an Example. It is explanatory drawing of the construction example of the weed suppression tape 1. FIG. 1 is a cross-sectional view of a weed suppression tape 10.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weed suppression tape 2 Acrylic pressure sensitive adhesive layer 3 Surface layer part 4 Release sheet 5 Masking tape 6 Pavement material 7 Curb stone 8 Joint 10 Weed suppression tape 11 Adhesive layer 12 Base layer part 13 Surface layer part 14 Release sheet

Claims (5)

  An acrylic pressure-sensitive adhesive layer having a thickness of 0.3 to 2.0 mm is provided on the lower surface of the surface layer portion made of a resin film having a thickness of 0.05 to 0.7 mm, and a release sheet is provided on the upper surface of the surface layer portion. Weed suppression tape characterized by   A base layer portion made of an elastic material such as synthetic rubber is provided on the lower surface of a surface layer portion made of a resin film having a thickness of 0.05 to 0.7 mm, and an adhesive layer is further formed on the lower surface. And a weed prevention tape, characterized in that a release sheet is provided on the upper surface of the surface layer portion.   The weed suppression tape according to claim 1 or 2, wherein the surface layer portion is an ionomer resin sheet.   4. The weed suppression tape according to claim 1, wherein at least one of the surface layer portion, the acrylic pressure-sensitive adhesive layer or the base layer portion contains a light reflecting material and / or a fluorescent material. tape   The weed prevention tape according to any one of claims 1 to 4, covering a joint between the pavement and another structure, a joint between the structures, a joint between the pavement, or a crack generated on the surface of the pavement or the structure. A method for inhibiting weeds of joints or cracks, characterized by sticking

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