JP5720069B2 - Plant mat - Google Patents

Description

  The present invention relates to a plant mat. More particularly, it relates to a plant mat for transplanting or decorating.

Traditionally, plants that are connected by rhizomes such as lawn and jade dragon and spread as a carpet as a whole are usually transplanted to other places by straining. In this case, for example, a plant mat integrated with soil cut into a square with a thickness of several centimeters will be transplanted, but the soil will not retain enough water, and even after it has withered or transplanted, May not grow well.
For this improvement, for example, lawn seeds are cultivated and grown in lawn soil in which acrylic amide, acrylic polymer, anion exchange polymer, polyacrylate gel-like high-grade polymer and peat moss are stirred and mixed. A vegetation mat (for example, Patent Document 1) and a plant mat (for example, Patent Document 2) containing a water retention agent as a plant growth base for preventing sloped surface erosion have been proposed.

  WO96 / 24238   JP-A-9-256372

However, the former vegetation mat can grow lawn from seeds, but the conventional polymer gel using water-absorbent resin does not have sufficient water supply capacity to the lawn, and plant mats such as growing lawn stocks are transplanted. Then, it might wither. The latter plant mat is not premised on straining or the like, and because natural glucomannan is used as a water retaining agent, the cost is high and it is not suitable as a plant mat used for straining inexpensive plants.
Further, since conventional plant mats wither when used upright, they could not be used upright for decoration.

  It is an object of the present invention to carry a plant mat on which plants are grown without dying, and to plant a plant mat for transplanting that does not wither even when watering is insufficient after transplanting, and for use as a decoration. The object of the present invention is to provide a plant mat that will not wither plants without watering for a long time.

In view of the above problems, the present inventor, as a result of earnest research, when the gel layer of a specific water-absorbent resin and the root of the plant are integrated, the plant mat is cut out and transplanted, stored, and after transplanting. It has been found that plants will not wither for a long time even if they stand, and the present invention has been completed.
Hereinafter, the invention of each claim will be described.

The present invention, live formed by integrally intertwined with the gel layer of the plurality of roots and below the water-absorbent resin of the plant is, a plant mat transfer cloth because, the plant is located on the grass or ball dragon , the plant mats are those where there is a gel layer under the soil, in the gel layer by curing the roots of the plant becomes transfer a rag because of plant mat placed on top of the hard foundation roots is difficult to enter the plant is there.
Water-absorbing resin: When 1 part by weight of the water-absorbing resin is absorbed by 100 parts by weight of ion-exchanged water at 25 ° C., the electric conductivity of the water-absorbing body is 0 to 2.0 mS / cm, and ion-exchanged water at 25 ° C. The water absorption magnification is 80 to 1000 times.
Furthermore, the invention is characterized in that the water-absorbent resin gel is a water- absorbent sheet gel containing a water-absorbent resin powder .
Furthermore, the present invention provides a method in which the water-absorbent sheet is obtained by spraying a water-absorbing resin powder on a base material and sandwiched between the other base materials in a sandwich manner, embossing method, needle punch method, stitch bond method, and fusion method. The water-absorbent resin is integrated. Furthermore, the present invention is a plant mat for transplanting the plant mat, and the plant mat is cut out and transplanted to another place.

The plant mat of the present invention is a plant mat that can be transported without dying the plant mat on which the plant is growing and that does not wither even when watering is insufficient after transplanting. When transplanted by plant stock separation or the like, the plant mat that has been cut out does not wither even after being stored or after transplanting. It is suitable for plant mats such as lawns and jade dragons that are connected with rhizomes and spread like a carpet. This plant mat is suitably used for parking lot greening, rooftop greening of buildings, etc., wall greening and the like.
In addition, the plant mat of the present invention can be used for decoration by putting it in a picture frame, and even if it is erected, it will not withstand a long period of time.

It is model sectional drawing of the water absorbing sheet of one Embodiment in this invention. 1 is a schematic cross-sectional view of a plant mat for transplanting in which lawns and water-absorbing sheets are intertwined and integrated as one embodiment of the present invention. It is a perspective view of the plant mat for decorating of one form of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail. Note that the present invention is not limited to the following embodiments. Various modifications can be made to the following embodiments within the same and equivalent scope as the present invention.

  The water-absorbent resin used in the present invention has an electric conductivity of 0 to 2.0 mS / cm when the water-absorbent resin is absorbed into 100 parts by weight of ion-exchanged water at 25 ° C. If the water absorption rate of 25 degreeC ion-exchange water is 80-1000 times, there will be no limitation in particular. Since this water-absorbent resin does not inhibit the growth of plant roots, the root and gel layer can be intertwined and integrated, and it will not wither for a long time even when stored, after transplanting, or when used upright. It can be a plant mat. The above numerical range is in accordance with the description in JP-A-2007-319029.

The electric conductivity of the water absorbent resin is usually 0 to 2.0 mS / cm, preferably 0 to 1.8 mS / cm, more preferably 0 to 1.6 mS / cm. If the electric conductivity exceeds 2.0 mS / cm, the growth of the roots of the plant becomes poor, and the plant mat in which the root and the gel layer are integrated is not obtained.
Electrical conductivity was measured by the following method.

[Measurement method of electrical conductivity]
1 part by weight of a water-absorbing resin is added to 100 parts by weight of ion-exchanged water at 25 ° C., and left in a thermostatic bath at 25 ° C. for 8 hours to swell the water-absorbing resin to prepare a water-absorbing body. It is confirmed with a thermometer that the temperature of the water absorbent body is 25 ° C., and the electrode of the specific conductivity measuring device is inserted into the water absorbent body to read the value. When the water absorption capacity of the water absorbent resin is small, the water absorbent body of the high water absorbent resin and the ion exchange water are separated into two phases. Measure the insertion value. If the two phases are separated again immediately after stirring and homogenization, the electrode of the specific conductivity measuring device is inserted under stirring and the value is measured.

The water absorption ratio of the water absorbent resin to 25 ° C. ion-exchanged water is usually 80 to 1000 times, preferably 100 to 1000 times, and more preferably 120 to 1000 times. If the water absorption ratio is less than 80 times, the water retention capacity as a medium for germination and growth of seeds and the like is lowered, and it is necessary to use a large amount, resulting in an increase in cost and frequent replenishment of water. A larger water absorption ratio is preferable because a small amount of use is sufficient, but a water-absorbent resin with a water absorption ratio exceeding 1000 times is too high in the adhesiveness of the hydrous gel after polymerization in the production process, Subsequent drying is very difficult, has manufacturing problems and is not practical.
The water absorption magnification was measured by the following method.

[Measurement of water absorption ratio in ion-exchanged water]
A sample L (g) of the water-absorbent resin was placed in a nylon net bag (250 mesh), and the bag was immersed in excess ion-exchanged water together with the bag. After 60 minutes of immersion, the whole bag was pulled up in the air, allowed to stand and drained for 15 minutes, and then the mass M (g) was measured to determine the water absorption capacity from the following formula.
In addition, operation similar to the above was performed using only a net bag, and this mass N (g) was subtracted as a blank. Absorption capacity of ion exchange water = (MN) / L

  The water-absorbing resin of the present invention includes a polymer (X) composed solely of a nonionic water-soluble ethylenically unsaturated monomer (A), and a polymer composed solely of an anionic water-soluble ethylenically unsaturated monomer (C). (Y) and a copolymer (Z) having a nonionic water-soluble ethylenically unsaturated monomer (A) and an anionic water-soluble ethylenically unsaturated monomer (B) as constituent units. It is possible to use only (X), (Y), (Z), and it is also possible to use a mixture of two or more of (X), (Y), (Z). Among these, the water-absorbent resin comprising the anionic polymer (Y) or (Z) does not particularly inhibit the growth of plant roots, so that the root and gel layer can be entangled and integrated, and during storage However, a plant mat that does not wither for a long period of time even after transplanting or standing up is preferable.

  In the present invention, the nonionic water-soluble ethylenically unsaturated monomer (A) that is a constituent unit of the polymer (X) is a hydroxyl group-containing radically polymerizable water-soluble monomer (the alkyl group has 2 to 2 carbon atoms). 3 hydroxyalkyl mono (meth) acrylates), amide group-containing radical polymerizable water-soluble monomers ((meth) acrylamide, N-vinylacetamide, etc.), tertiary amino group-containing radical polymerizable water-soluble monomers (Dimethylaminoethyl (meth) acrylate, etc.), epoxy group-containing radically polymerizable water-soluble monomers (glycidyl (meth) acrylate, etc.), and other radically polymerizable water-soluble monomers (4-vinylpyridine, vinylimidazole) Etc.). Of these, preferred are (meth) acrylamide and / or hydroxyalkyl mono (meth) acrylates having 2 to 3 carbon atoms in the alkyl group.

  Examples of the anionic water-soluble ethylenically unsaturated monomer (B) used in the present invention include radical polymerizable water-soluble monomers having a carboxyl group, a sulfonic acid group, and a phosphoric acid group ((meth) acrylic acid, vinyl Sulfonic acid and the like) and / or a monomer that becomes water-soluble by hydrolyzing them (such as vinyl acetate); or a salt thereof. Particularly preferred are acrylic acid and its salts.

  Examples of the salt include salts of water-soluble monomers containing the carboxyl group, sulfonic acid group, and phosphoric acid group [for example, alkali metal salts (sodium salt, potassium salt, etc.), alkaline earth metal salts (calcium salt, magnesium salt). Etc.), amine salts or ammonium salts, etc.]. Among these, preferable examples include (meth) acrylic acid (salt) having good polymerizability.

In the present invention, when the anionic water-soluble ethylenically unsaturated monomer (B) is (meth) acrylic acid (salt), the ions necessary for neutralizing the carboxyl group include alkali metal ions and periodic table. Examples include polyvalent metal ions and ammonium ions belonging to Group 2 or Group 13. As the alkali metal ions, Na ⁺ and K ⁺ are preferable, and as the polyvalent metal ions belonging to Group 2 or Group 13 of the periodic table, Be ²⁺ , Mg ²⁺ , Ca ²⁺ , Sr ²⁺ , Ba ²⁺ , B ³⁺ , Al ^{3+ and the} like are preferable.

Examples of ions necessary for neutralization of the carboxyl group in the polymers (Y) and (Z) include alkali metal ions, polyvalent metal ions belonging to Group 2 or 13 of the periodic table, and ammonium ions. As the alkali metal ions, Na ⁺ and K ⁺ are preferable, and as the polyvalent metal ions belonging to Group 2 or Group 13 of the periodic table, Be ²⁺ , Mg ²⁺ , Ca ²⁺ , Sr ²⁺ , Ba ²⁺ , B ³⁺ , Al ^{3+ and the} like are preferable.

  Here, when the degree of neutralization based on the sum of alkali metal ions and ammonium ions is less than 10 equivalent%, the ability to improve water retention is reduced, and it is necessary to use a large amount. When it exceeds 50 equivalent%, the electrical conductivity is 2 Inhibits plant root growth because it exceeds 0.0 mS / cm. The degree of neutralization with polyvalent metal ions belonging to Group 2 or Group 13 of the Periodic Table is preferably 0 to 50 equivalent%, more preferably 10 to 40 equivalent%. Here, when the degree of neutralization by the polyvalent metal ions belonging to Group 2 or Group 13 exceeds 50 equivalent%, the degree of crosslinking of the water-absorbent resin becomes too high, making it difficult to produce.

  In the present invention, the water-absorbing resin is substantially nonionic or anionic, and the cationic polymerizable monomer (C) (trimethylammonium acrylate / ethyl chloride, etc.) The monoethylenically unsaturated monomer (D) (for example, styrene, n-butyl acrylate, etc.) is copolymerized within a range not exceeding 10 mol% with respect to the total mass of (A) and (B), for example. May be.

  In the present invention, the average particle diameter of the water-absorbent resin particles in the state before water absorption is not particularly limited as long as it is a granular material, but is preferably about 20 μm to 5 mm, more preferably about 100 μm to 3.5 mm. It is. When the average particle size is 20 μm or more, it becomes difficult to form mamako (spatter) at the time of water absorption, and thus improvement in water retention capacity is not hindered. On the other hand, when the average particle size is 5 mm or less, the water absorption speed increases and water easily penetrates to the center of the particle, so that the water retention capacity of the gel layer and the water supply capacity to the root are improved. The average particle diameter of the water-absorbent resin in the dry state before water absorption is “laser diffraction scattering method” (for example, Nikkiso Co., Ltd., trade name: Microtrac FRA particle size analyzer) or sieve shake. It can be measured by the method.

  The production method of the highly water-absorbent resin in the present invention can be produced by a known method for producing a water-absorbent resin. For the polymers (X), (Y), and (Z), for example, methods described in JP-A-8-266895, JP-A-10-191777, and JP-A-2007-319029 can be applied.

The plant mat in the present invention refers to a mat on which plants are grown, and is not a mat containing seeds without roots. Further, the mat is a large mat cut out, but even a plurality of roots intertwined with the gel layer in the pot and integrated is considered to be a small mat. Moreover, you may transplant every pot. The shape of the mat is not particularly limited, such as a circle, an ellipse, or a quadrangle, but a quadrangle is preferable because it is easy to work and has no waste. The size is preferably 10 cm or more on a side, more preferably 30 cm or more. If it is a pot, it is circular and a diameter of 5 cm or more is preferable. Intertwined and integrated means from the one in which the roots are well stretched and integrated in the gel layer to the one that penetrates the gel layer and holds the gel layer in an integrated state. It is in a state where it cannot be separated.
A plurality of roots refers to a root connected to a stem, not a fine root derived from the root, and the plurality refers to two or more, preferably three or more. If there are two or more, the root and gel layer, and the root and root are intertwined into a solid plant mat.

The gel in the present invention is formed by mixing the water absorbent resin powder and water. The gel is not limited as long as it is a layer, and the gel layer may be a gel-only layer or a gel layer formed by absorbing the water-absorbent resin powder in the water-absorbent sheet. The gel layer of the water absorbing sheet is preferable.
The ratio of the water-absorbent resin to water varies depending on the water-absorption capacity of the water-absorbent resin and the type of plant, but is preferably 1:10 to 1: 1000, more preferably 1:20 to 1: 500 by weight ratio. . The plant mat of the present invention does not wither for a long time even if watering is insufficient, but water is likely to evaporate from the surface at a high temperature or in a dry state.

  In the present invention, the gel layer (including the gel layer of the water-absorbent sheet) is previously grown under the roots of the plant so that the root and the gel are integrated into a plant mat. The gel layer (including the gel layer of the water-absorbing sheet) may be a gel layer before being placed under the root, or may be a gel layer when water is sprayed by placing a water absorbent resin powder under the root. Further, the gel layer and the water absorbing sheet may be placed on another water absorbing base material such as a nonwoven fabric or paper, or sandwiched between them. For example, (1) the gel layer only, (2) the gel layer under the soil, (3) the gel layer under the soil, including the gel layer in which the roots in the plant mat are integrated There may be mentioned, for example, those reinforced with a water-permeable base material such as nonwoven fabric or paper.

  Moreover, a well-known plant body growing support | carrier can be mix | blended in arbitrary amounts with a gel layer. The carrier for growing plant bodies is not particularly limited as long as it is generally used as a substance suitable for growing plant bodies. Examples of substances suitable for plant growth include water-insoluble solid substances such as powders of inorganic substances and / or organic substances, porous bodies, pellets, fibers, and foams. Various additives described later are excluded. As inorganic substances, inorganic powders (soil, sand, fly ash, diatomaceous earth, clay, talc, kaolin, bentonite, dolomite, calcium carbonate, alumina, etc.); inorganic fibers (rock wool, glass fibers, etc.); inorganic porous materials [ Filton (porous ceramic, kuntan), vermiculite, pumice, volcanic ash, zeolite, shirasu balloon, etc.]; inorganic foam (perlite, etc.) and the like.

  Organic substances include organic powders [coconut shells, rice straw, peanut shells, mandarin shells, wood chips, wood powder, dried coconut powder, synthetic resin powders (polyethylene powder, polypropylene powder, ethylene-vinyl acetate copolymer powder] Etc.]; organic fibers [natural fibers [cellulosic (cotton, sawdust, straw, etc.) and others, grass charcoal, wool, etc.], artificial fibers (cellulosic, such as rayon, acetate, etc.), synthetic fibers (polyamide, Polyester, acrylic, etc.), pulp (mechanical pulp (pulverized wood pulp, asprund-based ground wood pulp, etc.), chemical pulp (sulfite pulp, soda pulp, sulfate pulp, nitrate pulp, chlorine pulp, etc.), semi-chemical pulp, recycled Pulp (for example, mechanical crushing or pulverization of paper once made from pulp, or Recycled waste paper pulp that is mechanically crushed or pulverized paper, etc.)], other waste materials (waste material produced from the manufacture of paper diapers, etc.)]; organic porous material (coconut shell activated carbon, etc.); organic foam [cereal, synthetic Resin or rubber foam (polystyrene foam, polyvinyl acetal sponge, rubber sponge, polyethylene foam, polypropylene foam, urethane foam, etc.) and the like]; organic pellets [rubber and synthetic resin pellets, etc.] and the like. The above-mentioned plant growth carrier may be used alone or in combination of two or more as required. Among these, inorganic porous bodies, inorganic foams, organic fibers, rubber and synthetic resins are preferable.

A plant mat for transplantation is described.
First, the natural lawn that was cut out was left as it was, or the natural soil adhering to the back surface, that is, the stems and hair roots, was washed away to form a gel layer made of a water-absorbent resin or water to become a gel layer. After placing on a water-absorbing sheet and spraying water, it is preferably left for 2 weeks or longer to cure, and the roots are entangled with the gel to be integrated. And take out the integrated one. In order to entangle the root and gel layer of the plant mat that has been cut in advance, it may be carried out anywhere, but a hard base, such as hard earth, concrete, plastic plate (for example, [Purabeni (registered trademark)) It is preferable to carry out the process on a plastic corrugated cardboard such as Yamanaka Bussan Co., Ltd.] because the root and the gel layer are easily entangled and integrated.

  The plant mat for decorating is cut into a predetermined shape for a plant that has been cured with roots entangled in the water-absorbent sheet layer, or after having been cured by entwining the roots of the plant with the water-absorbed sheet that has been cut off, Use. The periphery of the plant mat can be fixed with a frame and can be used for decoration. The material, shape, and size of the frame are not particularly limited, but a frame such as a picture frame or a picture frame is preferably used because it is used for decoration. There is no particular limitation under the plant mat, but a plate-like one that supports the plant mat is preferable. A water absorbing sheet or soil may be further inserted between the plate-like material and the plant mat, but the plant mat is preferably fixed to the plate-like material by a method such as punching. In this way, the plant mat itself does not fall even when used in an upright position, and the plant does not fall because it is entangled with the nonwoven fabric of the water absorbent sheet. Even if there is soil, it is not on the surface, so it rarely falls. The plant mat stored in the frame created in this way can stand and stand up for a long time even if the watering is insufficient, and can be appreciated for decoration like paintings and photographs. Here, “standing” refers to a state of standing, hanging, or slanting, and includes a slanting state other than upright.

  At least one surface of the water absorbent sheet is water permeable. If at least one surface is permeable, the roots of the plant enter the water-absorbing sheet and are integrated with the gel layer. Preferably both surfaces are water permeable. When both surfaces are water permeable, the roots of the plant penetrate the water absorbent sheet and entangle with the water absorbent sheet containing a water permeable base material such as nonwoven fabric or paper to reinforce the form of the plant mat.

  As the water absorbent sheet, a water absorbent resin powder is fixed to a water absorbent / water retaining substrate, the water absorbent resin powder is sprayed on the substrate, and the other substrate (water permeable sheet or water impermeable sheet) is used. Examples include a sandwiched sandwich and a water-absorbing resin integrated by an embossing method, a needle punch method, a stitch bond method, a fusion method, or the like. It is preferable that the water-absorbing resin on the water-absorbing / water-holding base material is continuously sprayed regardless of whether the water-absorbing resin is on the entire surface of the base material or in a linear shape having a width.

  Examples of water-absorbing / water-retaining base materials include cotton-like materials such as wood pulp, and various fibers such as water-absorbing fibers by appropriate methods such as papermaking, mechanical bonding, binder bonding, spunbonding, and spunlace. The laminated body formed by laminating these is mentioned.

  Among the above water-absorbing sheets, preferred are those in which the water-absorbing resin powder is fixed using an adhesive or a binder resin on one side or both sides of a substrate such as cloth (particularly preferably non-woven fabric) or paper, Particularly preferred are wood pulp cotton, laminated paper or tissue-fixed water-absorbent resin powder, sandwiched between substrates and then embossed or needle punched to absorb water A resin integrated or a plastic film with water absorbent resin powder fixed on one or both sides of the plastic film using an adhesive or binder resin. For example, using cellophane or vinyl adhesive tape to absorb water on the adhesive surface. The thing which spread | dispersed resin powder and was fixed with the crimping | compression-bonding roll is mentioned. The reason why these are preferred is that it is difficult to prevent the water-absorbing resin powder from swelling due to water absorption, so that it absorbs a lot of water and retains water. This is because it can grow without dying for a long time even if transplanted to another place or standing. Specifically, for example, paper or cloth is preferable because the plant is adapted and the plant mat is reinforced. Since the plant mat is mechanically reinforced especially when the fabric is bonded at least on one side with a needle punch or the like, the plant mat stored in the frame can be used as a decorative plant mat or used for wall greening It is also suitable as a plant mat.

As the pressure-sensitive adhesive and binder resin used above, known acrylic resins, epoxy resins, urethane resins, ester resins and the like can be used, and any of water-based, solvent-based and solvent-free systems may be used. At the time of use, it can be applied to the substrate as it is or diluted to an arbitrary concentration with water or a solvent (such as methanol, ethanol, acetone, methyl ethyl ketone, or ethyl acetate). The coating method is a coating method used for line coating such as roll coater, brush coating, and on-site coating. The dry film thickness is preferably 0.1 μm to 3 mm, more preferably 1 μm to 1 mm. It is preferable to spray the water-absorbent resin during or after drying after painting. Here, a fixed amount of the powder of the water absorbent resin is preferably 1 to 100 g / ^{m 2,} more preferably from 10 to 60 g / ^{m 2,} particularly preferably 20 to 50 g / ^{m 2,} and most preferably 30 to 40 g / m ² . When the fixed amount is 1 g / m ² or more, the water retention is good, and when it is 100 g / m ² or less, the cost performance in terms of performance and economy is good.

  As a water-permeable sheet, if it is a flexible and water-permeable sheet and has a strength that does not break before use, the form and material are not particularly particular. The water permeable substrate is not particularly limited as long as it has holes through which water can pass, but the size of the holes is preferably 0.001 to 1 mm, particularly preferably 0.01 to 0.5 mm. The thickness of the substrate is preferably 0.001 to 5 mm, more preferably 0.01 to 3 mm.

Examples of the material of the water permeable sheet include natural fibers such as cotton, wool, silk, cellulose, and pulp, synthetic resins or fibers such as polyester, nylon, acrylic, polyethylene, polypropylene, polyurethane, polystyrene, poval, and modified products thereof, and rayon. Semi-synthetic fibers such as acetate, mixed materials thereof, and paper materials such as western paper and Japanese paper can be applied. Natural fibers and paper are preferred. Moreover, what is melt | dissolved or disintegrates at the time of water absorption after installing in soil is preferable.
Here, the water permeability is 30 seconds or less, preferably 15 seconds or less, particularly preferably 5 seconds or less, when expressed in terms of time (seconds) for 100 ml of 25 ° C. ion-exchanged water to pass through an area of 100 cm ^2. It is.

  Examples of the form include cloth such as knitted fabric, woven fabric, and non-woven fabric; mesh film such as a sheet of polyethylene, polypropylene, etc. with many fine holes; paper such as western paper and Japanese paper. Among these, cloth and paper are preferable, and tissue and non-woven fabric are particularly preferable. The non-woven fabric is described in detail in “Basics and Applications of Non-woven Fabric” (issued by the Japan Textile Machinery Society). In addition, in the case of fixing by the heat fusion method, a material containing a heat fusion material such as a heat fusion fiber and / or a film is used, but “the actual state of the heat fusion nonwoven fabric and the whole heat fusion fiber” (1989). And those described in detail in Osaka Chemical Marketing Center Co., Ltd.

  The water-impermeable sheet is not limited as long as it is flexible and water-impermeable sheet; however, a synthetic resin film such as polyester film, nylon, polyethylene film, polypropylene film; laminated laminate film thereof; aluminum foil, etc. And a multilayer laminate film of a synthetic resin film and a metal film. From the viewpoint of flexibility, a synthetic resin film and a laminated laminate film of synthetic films are preferable. The thickness is not particularly limited.

  FIG. 1 is a cross-sectional view of a water absorbent sheet according to an embodiment. (A) is the sheet | seat which spread | dispersed and pressed the water-absorbent resin powder 2 on the water-permeable sheet 1 or the water-impermeable sheet 3. (B) is a water absorbent sheet in which a water absorbent resin powder 2 is sandwiched between two water permeable sheets 1. (C) is a laminated sheet in which a water-absorbent resin powder 2 is sandwiched between a water-permeable sheet 1 and a water-impermeable sheet 3 to absorb water. (D) is a laminated sheet constituted by further superimposing a water-impermeable sheet 3 on one of the water-absorbing sheets of (a). (E) is a laminated sheet constituted by sandwiching a sheet in which a water-absorbent resin powder 2 is sandwiched between two water-permeable sheets 1 and another two water-permeable sheets 1. Preferably, the sheet is water permeable on both sides as in (a), (b) and (e).

  The size of the water-absorbing sheet is not particularly limited, and may be adjusted to the size of the plant mat (including the inside of the pot). Furthermore, the gel layer in the present invention may contain components known in the art such as fertilizers, plant growth hormones, antibacterial agents, trace elements, and fungicides.

FIG. 2 is a cross-sectional view showing an embodiment of a plant mat for transplantation according to the present invention. The state where the root 7 of the lawn 6 penetrates through the soil 5 and the water absorbing sheet 4 and is intertwined with each other is shown.
FIG. 3 is a perspective view of a plant mat for decoration according to one embodiment of the present invention. A plant mat is placed in a picture frame and leans against a photo frame.

  The plant mat of the present invention is suitably used for greening of parking lots, greening of rooftops of buildings, etc., and can be erected on a wall for decoration or in a photo stand. It is easy to leave the taken-out plant mat as it is and fix it by various methods. Since it is easy to fix even on a slope, it is also suitable for slopes and wall greening. Standing plant mats and plant mats placed on slopes and wall greening will not wither for a long time even if watering is insufficient.

  Although it does not specifically limit as a plant in this invention, The plant which a rhizome connects and spreads in the shape of a carpet as a whole is preferable, and a natural lawn, a dragon and the like are specifically suitable for the plant mat for transplanting. Natural turf means wild turf (Zoisia, japonica), gano turf, turf (all turf that forms turf such as tall fescue, Kentucky bluegrass, perennial grass) that is produced or grown naturally in the field or field. Say. These plants are preferably transplanted by breeding and propagated, and are usually cut into mats and transplanted. Moreover, what put two or three valves etc. in the pot may be used. The plant mat for decorating is preferably a plant that is rooted and entangled with the nonwoven fabric fibers of the water-absorbent sheet.

Production Example 1 (Production of water-absorbent resin powder)
To a 1 L beaker, 230.4 g (3.2 mol) of acrylic acid corresponding to the monomer (C), 1.0 g of pentaerythritol triallyl ether as a crosslinking agent, and 636 g of water were added and cooled to 10 ° C. This solution was put into an adiabatic polymerization tank, and dissolved oxygen of the solution was adjusted to 0.1 ppm through nitrogen (measured with a trade name dissolved oxygen meter DO220PB, manufactured by Orient Electric Co.), and then 35% hydrogen peroxide as a polymerization initiator. 0.023 g of water. 0.00575 g of L-ascorbic acid and 0.23 g of potassium persulfate were added. After about 30 minutes, the polymerization reaction started, and after about 2 hours, the maximum temperature reached 72 ° C. Further, the polymerization was completed by aging at this temperature for 5 hours. The obtained polymer (corresponding to the polymer (Y)) had a hydrogel form. The polymer was stirred for about 2 hours with a kneader (trade name BENCH KNEEADER PNV-1; manufactured by Irie Trading Co., Ltd .; rotation speed: 70 rpm), and further chopped with 50% calcium hydroxide dispersion 61.6 g, 48% Sodium hydroxide aqueous solution 64.0g was mix | blended and it stirred and mixed by the kneader for about 2 hours. Then, it was heated and dried at 110 ° C. using a band dryer (air-permeable dryer, manufactured by Inoue Metal Co., Ltd.), pulverized and measured with an average particle size of 370 μm (trade name: Microtrac FRA particle size analyzer manufactured by Nikkiso Co., Ltd.). ) Water-absorbent resin powder (1) was obtained.

Production Example 2 (Production of water-absorbent resin powder)
In a 1 L beaker, 115.2 g (1.6 mol) of acrylic acid corresponding to monomer (B), 227.2 g (1.6 mol) of aqueous solution of 50% acrylamide (corresponding to monomer (A)), water 562. 5 g was added and cooled to 5 ° C. This solution was put into an adiabatic polymerization tank, and the dissolved oxygen amount of the solution was adjusted to 0.1 ppm through nitrogen. Then, 0.00016 g of 35% hydrogen peroxide, 0.00008 g of L-ascorbic acid and 4% were used as polymerization initiators. , 4′-Azobis (4-cyanovaleric acid) 0.04 g was added. After about 30 minutes, the polymerization started, and after about 5 hours, the maximum reached temperature of about 75 ° C. was reached and the polymerization was completed, and a hydrogel polymer (corresponding to copolymer (Z)) was obtained. This polymer was stirred for about 2 hours with a kneader and then chopped, and then 17.8 g of a 50% calcium hydroxide dispersion and 113.3 g of a 48% sodium hydroxide aqueous solution were blended, and stirred for about 2 hours with a kneader. And mixed. Then, it dried at 120 degreeC for 1 hour using the band dryer, and it grind | pulverized, and obtained the uncrosslinked dry powder with an average particle diameter of 500 micrometers. 100 g of this uncrosslinked dry powder is put into a stainless steel vat with a thickness of 3 mm, and heated for 160 minutes with a circulating dryer at 160 ° C. for thermal crosslinking to obtain a water absorbent resin powder (2) having an average particle size of 3300 μm. It was.

Production Example 3 (Production of water-absorbent resin powder)
Implementation was carried out except that 192.0 g of the 48% sodium hydroxide aqueous solution was used instead of 61.6 g of the 50% calcium hydroxide dispersion and 64.0 g of the 48% sodium hydroxide aqueous solution used in Production Example 1. The same operation as in Example 1 was performed to obtain a water absorbent resin powder (3) (corresponding to the polymer (Y)) having a water absorption rate of 400 g / g, an electric conductivity of 3.0 mS / cm, and an average particle size of 200 μm.

Production Example 4 (Creation of a water absorbent sheet)
A basis weight of 200 g / m ² of the water-absorbent resin produced in Example 1 on the cotton nonwoven fabric powder (1) only uniformly sprayed can at a rate of 40 g / m ^2, further cotton This homogeneous thereon The nonwoven fabric was superposed on the upper side, and the water absorbent resin powder sandwiched between two cotton nonwoven fabrics was fixed with a needle punch to obtain a water absorbent sheet (1). This was cut to a width of 30 cm and a length of 40 cm and used for the test.

  Similar to Production Example 4 using water-absorbent resin powders (2) and (3) and a commercially available nonionic water-absorbent resin (trade name: Thermogel) instead of water-absorbent resin powder (1) Thus, water-absorbing sheets (2) to (4) were obtained. This was cut to a width of 30 cm and a length of 40 cm and used for the test.

Examples 1 and 2 and Comparative Examples 1 to 3
The water-absorbing sheets (1) to (4) were laid on the bottom of the lawn-grown soil that had been stripped to a width of 30 cm, a length of 40 cm, and a depth of about 3 cm, and left on the rooftop concrete of the building. One month later, the gel layer and the root were intertwined (observation A). This was taken out and placed in the shade without watering for a month, and transplanted to another place with soil. The state of the lawn at that time was observed (observation B). For comparison, the water-absorbing sheet was not placed under the lawn mat peeled off, placed in the shade without watering for 1 month, and transplanted to another soiled place (Comparative Example 3). These results are shown in Table 1.

  It can be seen that the plant mat for transplantation of the present invention can be transported without withering the plant mat on which the plants are grown, and does not wither even when watering is insufficient after transplanting.

Example 3
Cut the water-absorbing sheet (1) into a size of 20cm x 30cm, absorb the water, place the plant mat that has been entangled with the roots of the ornamental plants on it for one week, and place it in a frame with the same inner diameter. Several points around and inside were fixed to the back plate using a wire. It was hung on the wall for decoration, but it did not sprinkle for 2 weeks, but the plant did not wither. Moreover, neither plant nor soil fell from the plant mat.

  The plant mat for transplanting or decorating of the present invention can be suitably used in the field of greening business or for decoration.

DESCRIPTION OF SYMBOLS 1 Water-permeable sheet 2 Water-absorbent resin powder 3 Water-impermeable sheet 4 Water-absorbent sheet 5 Soil 6 Lawn 7 Root 8 Plant mat 9 Frame 10 Photo frame

Claims (4)

Alive formed by integrally intertwined with the gel layer of the plurality of roots and below the water-absorbent resin of the plant is, a plant mat transfer cloth because a plant lawn or ball dragon, plant mat are those where there is a gel layer under the soil, move cloth because of plant mat made by curing the plant roots in the gel layer was placed on a hard foundation roots is difficult to enter the plant.
Water-absorbing resin: When 1 part by weight of the water-absorbing resin is absorbed by 100 parts by weight of ion-exchanged water at 25 ° C., the electric conductivity of the water-absorbing body is 0 to 2.0 mS / cm, and ion-exchanged water at 25 ° C. The water absorption magnification is 80 to 1000 times. 2. The plant mat according to claim 1, wherein the gel layer of the water absorbent resin is a gel layer of a water absorbent sheet containing a water absorbent resin powder . The water-absorbent sheet spreads the water-absorbent resin powder on the base material, sandwiched between the other base materials, and the water-absorbent resin is integrated by the embossing method, needle punch method, stitch bond method, and fusion method. The plant mat according to claim 1 or 2, wherein the plant mat has been converted into a product. The plant mat for transplanting, wherein the plant mat according to any one of claims 1 to 3 is cut out and transplanted to another place.

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