Artificial lawn ground and its laying method

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to an artificial turf ground containing granules filled with granules that can be suitably used for a ground such as a soccer field, a baseball field, or a hockey field.

【0002】

[Conventional technology]

In recent years, artificial turf used for the ground has been developed in the direction of being closer to the natural turf for athletes who want to play comfortably while considering the health management of the player. Recently, as a method to make various properties of artificial turf with sand more similar to natural turf, the length of the pile is set to about 50 mm longer than 19 mm to 20 mm that is usually used for tennis courts, and sand is planted in the gaps between the piles. A method of constructing an artificial turf by filling a layer of about 30 mm with granules of rubber chips or the like is already known. However, in the artificial turf ground with sand in such a known construction method, (1) Since the pile protruding from the packing layer is in an upright state, the texture is hard and the granules scatter and move violently.

【0003】

(2) The rolling property of the ball is unnatural (lacks straightness) and cannot be used for ball game grounds, especially for hockey competitions.

【0004】

(3) Impact absorption performance is unclear because the filling amount of sand and rubber chip granules is unspecified.

【0005】

(4) Since the material used for the pile is a polyolefin resin, it cannot withstand long-term use.

【0006】

(5) By using rubber chips for granules, the odor of rubber chips becomes a problem compared to ordinary sand-filled coats.

【0007】

(6) By using rubber chips for particulate matter, it lacks flame retardancy compared to ordinary sand-filled coats. There was a problem such as.

【0008】

[Problems to be Solved by the Invention]

In view of the background of the prior art, the present invention prevents the movement of the granules filled in the gaps between the piles planted on the base material, has excellent shock absorption, is environmentally friendly, and has a more natural grass texture and feel. It is intended to provide an artificial turf ground similar to.

【0009】

[Means for solving problems]

The present invention employs the following means in order to solve such a problem. That is, the artificial turf ground of the present invention is an artificial turf containing granules in which the gaps between piles planted on the base material are filled with granules, and the pile length (A) is the length when the pile is upright. , The average upright length (B) of the pile in the range of 30 to 60 mm and protruding from the surface of the packed granule is 30 to 70% of the pile length (A), and the protruding pile. The portion is characterized in that it is bent or curved to a height in the range of 30-70% of the average upright length (B) of the protruding pile.

【0010】

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention is an artificial turf that prevents the movement of granules filled in the gaps between piles planted on the base material, has excellent shock absorption, is environmentally friendly, and has a texture and feel that are more similar to those of natural lawn. We studied the lawn ground diligently, and in an artificial lawn containing granules filled with granules in the turf of an artificial lawn made by planting a specific long pile, the tip of the lawn of a specific length was bent or curved. Apparently, we were able to solve this problem at once, and provide an artificial lawn ground that has a soft texture and is similar to natural lawn, effectively prevents the scattering and movement of granules, and obtains a more natural ball rolling property. It is a thing.

【0011】

Here, the average length of the pile protruding from the surface of the packed granule is the average value of the length of the pile protruding from the surface of the granule when extended with a scale of 100 pieces. The average height of the pile portion is an average value obtained by measuring the thickness from the surface of the granular material to the tip of the pile with a metal scale at 100 points.

【0012】

The granules of the present invention include hard granules such as silica sand, crushed waste, ceramics, crushed ceramic waste, glass beads, waste glass granules, sewage sludge molten slag, dust molten slag, and steel slag, rubber chip elastic granules, and plastics. Since it can be composed of elastic granules such as granules, it can greatly contribute to the effective utilization of industrial waste.

【0013】

Further, the granular material of the artificial turf containing granules of the present invention has a structure in which an elastic granular material layer is filled on a hard granular material layer, and the elastic granular material is larger than the particle size of the hard granular material. By further configuring the porosity of the elastic granular material layer to be larger than the porosity of the hard granular material layer, the shock absorbing performance has been greatly improved. Further, the elasticity of the formed gland can be adjusted by appropriately changing the ratio of the hard granules in the lower layer and the elastic granules in the upper layer.

【0014】

Further, the elastic granules contain 70% by weight or more of those having a particle size of 0.7 mm or more, and the hard granules contain 70% by weight or more of those having a particle size of 0.6 mm or less. The hard granular layer forms a stable lower layer with respect to the elastic granular layer, and the initial state of construction of the elastic granular layer can be stably maintained for a long period of time, and the optimum shock absorption performance is maintained for a long period of time. Is something that can be done. However, when the elastic granules have a particle size of 0.7 mm or more and a content of less than 70% by weight, the fine granules increase and the elastic granules are densely packed, so that optimum shock absorption can be obtained. Absent. Further, when the hard granules having a particle size of 0.6 mm or less are less than 70% by weight, the large granules increase, so that a packed layer in which the hard granules are sparse is formed, and the hard granular matter layer is formed. The morphology maintenance of itself becomes unstable, and the initial state of construction of the elastic granular material layer cannot be stably maintained for a long period of time.

【0015】

Further, the impact absorption performance can be improved by mainly using the elastic granules of rubber chips as the elastic granules and using the inorganic granules or the organic granules as the hard granules.

【0016】

Further, when a pile composed of at least one selected from twisted set yarn, crimped yarn and straight hair is used as the pile, an artificial lawn having a pile texture more similar to that of a natural lawn can be provided. Can be done.

【0017】

By using a pile using a polyamide resin as the material, the durability of the artificial turf can be significantly improved, and long-term use can be made possible.

【0018】

Further, as the base material of the artificial turf, a polypropylene plain woven base cloth made by entwining a non-woven fabric with a polypropylene plain woven base cloth by a needle punch is further superposed on a polypropylene plain woven base cloth. When used, it can provide artificial turf with significantly improved dimensional stability. The non-woven fabric used here has a basis weight of 30 g / m.²~ 150g / m²Is preferable.

【0019】

When the bending or bending direction of the pile of the artificial turf of the present invention is configured to be partially different, it is possible to provide an artificial turf ground similar to a natural turf having a striped pattern.

【0020】

Further, when the pile of the artificial turf is partially colored in a different color tone, a striped pattern can be imparted, and an artificial turf ground similar to a natural turf can be provided. If the striped pattern is adopted for each yard of the American football ground, it can be classified more clearly. Alternatively, it is easy to determine the offside position on the soccer ground. Furthermore, since the striped pattern can be permanently maintained as compared with the natural lawn, the maintenance cost related to the natural lawn can be significantly reduced.

【0021】

Further, by physically splitting the pile protruding from the filling surface of the artificial turf, it is possible to impart a texture and feel similar to those of the natural turf.

【0022】

In addition, by applying anti-shiny processing to the pile of the artificial turf, it is possible to reduce the shine (glitter due to reflection) and provide an artificial turf ground that is easy on the eyes. As such a shiny prevention processing method, pile surface scraping, pile surface unevenness processing, and the like can be adopted. Further, as such a shiny prevention process, a means of adding at least one of titanium oxide and silica to the raw material in the manufacturing process can be adopted. Further, by using a monofilament yarn for the pile, shine can be prevented.

【0023】

Further, in the artificial turf containing granules in which the gaps between the piles of the artificial turf are filled with granules, the odor is reduced by containing a deodorant in at least one part of the layer of the granules, the surface layer portion and the lower layer portion. Can be made to. As such a deodorant, at least one selected from activated carbon, zeolite, silica gel, activated whiteness, activated alumina, ion exchanger and diatomaceous earth can be used.

【0024】

As the blending amount of such a deodorant, it is preferable to add 1 to 15% by weight with respect to the granules from the viewpoint of effect. If the amount of the deodorant compounded exceeds 15% by weight based on the granules, the shock absorption and shape stability may be impaired.

【0025】

Further, a flame retardant effect can be imparted by adding a flame retardant to such granules, for example, elastic granules. As the flame retardant, at least one selected from aluminum hydroxide, antimony oxide, mica, talc, silica, alumina, clay and an organic halogen compound can be used, and the flame retardant is filled into an elastic granular material. It can be used by.

【0026】

Furthermore, when an ethylene / propylene / diene ternary copolymer (EPDM) is used for the elastic granules, an artificial turf ground having improved flame retardancy can be provided.

【0027】

In addition, after or while sprinkling water on the surface of the artificial turf, 10 to 80 N / cm.²When the roller is rolled under the pressure of the above, the pile is not damaged and the morphological destruction of the granular material layer does not occur, and the height after bending or bending of the pile protruding from the granular material surface is efficiently set in a specific range in a short time. Can be finished. The reason is that sprinkling water softens the pile of artificial turf and makes it easier to bend or bend. Furthermore, the pressurized load is 10 to 80 N / cm.²The reason for restricting to the range of is 10N / cm²If it is less than, the pile will be bent or curved at one end, but it will be restored to the upright state in a short time. Also, 80N / cm²This is because the pile is damaged and the morphology of the granular layer cannot be maintained, although the pile is bent or curved.

【0028】

FIG. 1 shows an example of a structure of an artificial turf ground laid on a base base according to an embodiment of the present invention. In FIG. 1, the structure 1 for the artificial turf ground is composed of granules 4 in the gaps of the pile 3 planted in the base material 5 on the base base 6 made of asphalt, concrete, asphalt concrete, mortar, crushed stone roadbed, etc. The pile length (A) of the artificial turf 2 containing granules filled with the above was shown as the pile length (A) when the pile 3 was upright, and the average upright length (B) of the pile protruding from the surface of the filled granules.

【0029】

That is, the pile length (A) is the length when upright, which is in the range of 30 to 60 mm, and the average upright length (B) of the pile protruding from the surface of the packed granule is the pile length. The protruding pile portion is 30 to 70% of (A) and has a bent or curved structure at a height in the range of 30 to 70% of the average upright length (B) of the protruding pile. Is preferable.

【0030】

Further, the granular material 4 is selected from silica sand, crushed waste, ceramics, crushed ceramic waste, glass beads, waste glass granular material, sewage sludge molten slag, dust molten slag, steel slag, rubber chip elastic granular material, and plastic granular material. It can be constructed using at least one of these.

【0031】

Further, as shown in FIG. 2, the hard granules may be sprinkled on the base material 5 to form the lower layer hard granules 4D, and the elastic granules may be sprinkled on the base material 5 to form the upper layer elastic granules 4U. The particle size of the elastic granules is larger than the particle size of the hard granules, and the porosity of the elastic granular material layer is larger than the porosity of the hard granular material layer. It is preferable that it is. Here, forming the elastic granules in a layered manner on the lower layer hard granules is effective in alleviating the special impact of falling and reducing scratches.

【0032】

Further, the particle size of the elastic granular material is larger than the particle size of the hard granular material, and the porosity of the elastic granular material layer is larger than the porosity of the hard granular material layer. In other words, it is difficult for elastic granules to fill the gaps between the lower hard granules, and the thickness of each of the lower hard granules and the upper elastic granules is maintained in a state close to the initial state for a long period of time. There is.

【0033】

As the granular material, a granular material having a composition containing 70% by weight or more of the elastic granular material having a particle size of 0.7 mm or more and 70% by weight or more of the hard granular material having a particle size of 0.6 mm or less is used. Is preferable. That is, the hard granular material layer forms a stable lower layer with respect to the elastic granular material layer, the initial state of construction of the elastic granular material layer can be stably maintained for a long period of time, and the optimum shock absorption performance is maintained for a long period of time. Retained.

【0034】

Further, it is preferable that the elastic granules are mainly composed of elastic granules of rubber chips, and the hard granules are composed of granules composed of inorganic granules or organic granules.

【0035】

Further, it is preferable that the pile 3 planted on the base material 5 of the artificial turf 2 is composed of at least one selected from twisted set yarn, crimped yarn and straight hair.

【0036】

Further, it is indispensable to use a polyamide resin as the material of the pile 3 for improving the durability. Further, the shape of the pile may be any of monofilament yarn, film split yarn and film slit yarn, and more preferably monofilament yarn is preferable.

【0037】

Further, it is preferable that the base material 5 of the artificial turf 2 is formed by superimposing a polypropylene plain weave base cloth on a polypropylene plain weave base cloth with a non-woven fabric.

【0038】

Further, as shown in FIG. 3, by changing the main settling direction 7 of the pile 3 of the artificial turf 2 for each piece of cloth 8, a striped pattern for each piece of cloth can be formed on the ground.

【0039】

Further, as shown in FIG. 4, the pile of the artificial turf is partially colored in a different color tone to have a striped pattern, so that an artificial turf ground similar to a natural turf can be obtained.

【0040】

Further, as shown in FIG. 5, the pile protruding from the surface of the filled granules of the artificial turf 2 was physically split by using the flat plate 11 with a needle. By performing the splitting, it is possible to obtain a texture and feel similar to that of natural lawn. As the splitting method, a rotating roller with a needle or the like may be used.

【0041】

Further, by applying the shine prevention treatment to the pile 3 of the artificial turf 2, the shine (glitter due to reflection) is reduced, and the artificial turf ground can be made easy on the eyes.

【0042】

Further, it is preferable that the anti-shiny processing method uses at least one of surface scraping and unevenness of the mouthpiece, and further, the anti-shiny processing method uses at least one of titanium oxide and silica as a raw material in the manufacturing process. It may be added.

【0043】

Furthermore, by using a monofilament yarn for the pile, it is possible to more preferably prevent shine.

【0044】

Further, in the artificial turf containing granules in which the gaps between the piles of the artificial turf are filled with granules, the odor is reduced by containing a deodorant in at least one portion of the granular material layer, the surface layer portion, and the lower layer portion. Get the effect.

【0045】

Furthermore, if the deodorant is composed of at least one selected from activated carbon, zeolite, silica gel, activated whiteness, activated alumina, ion exchanger, and diatomaceous earth, the effect of reducing odor can be obtained.

【0046】

Furthermore, when the amount of the deodorant blended is 1 to 15% by weight based on the granules, the effect of reducing the odor is obtained.

【0047】

Further, in the granules, a flame retardant effect can be obtained by adding a flame retardant to the elastic granules.

【0048】

Furthermore, if the flame retardant is composed of elastic granules filled with at least one selected from aluminum hydroxide, antimony oxide, mica, talc, silica, alumina, clay, and organic halogen compounds, it is flame retardant. Can be obtained.

【0049】

Furthermore, by using EPDM for the elastic granules, an artificial turf ground having better flame retardancy can be obtained.

【0050】

Further, as shown in FIG. 6, the pile protruding from the surface of the packed granules is rolled by using a rolling roller 12, bent or curved, and then the pile height C protruding from the surface of the packed granules is determined. It is a laying method that finishes within a specific range. At this time, after sprinkling water on the surface of the artificial turf or while sprinkling water, 10 to 80 N / cm²When rolling under the pressure of, the pile can be bent or curved more efficiently in a short time. More importantly, the height is finished in the range of 30 to 70% of the average upright length (B) of the protruding pile.

【0051】

Further, as shown in FIG. 7, the average length of the pile when stretched is as long as 30 to 60 mm, and the granules filled in the gaps between the piles easily flow out from the peripheral edge of the artificial turf 2, so that the granules are prevented from flowing out. By installing the member 13 side by side, it is possible to prevent the outflow of granular matter. As the granular material outflow prevention member, an artificial turf or a molded artificial turf in which a pile made of a monofilament yarn, a film split yarn, or a pile made of at least one selected from a film slit yarn is planted on a base material may be used. It is also possible to lay a material that serves as a cushioning material under the lawn.

【0052】

[Example]

Hereinafter, the present invention will be described in more detail with reference to Examples.

【0053】

(Example 1) On a base material obtained by superimposing a polypropylene plain woven base cloth on a polypropylene plain woven base cloth with a non-woven fabric, a twisted yarn made of nylon monofilament yarn (fineness 10,000 dtex) is applied to the pile when the pile is stretched. Fleece is planted to a length of 50 mm, styrene-butadiene rubber (SBR) resin is applied to the back surface of the base material, and then an artificial lawn made by solidifying by hot air drying is placed on a base base made of asphalt concrete. Was laid in. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 80% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. Subsequently, as a pile repair method, after sprinkling water in advance, 50 N / cm²The structure of the finished artificial turf ground was obtained by rolling or curving to a height of 40% of the average upright height (B) of the protruding pile by rolling using a roller made of rubber tire with unevenness.

【0054】

The evaluation results are shown in Table 1. The GB coefficient, which is an index showing elasticity, is 6% for silica sand, 2% for rubber chips, and 38% for porosity and 52% for rubber chips.

【0055】

Here, the GB coefficient is GB (%) = (h1 /) when the golf ball is naturally dropped from a height of 100 cm and the height after repulsion, that is, the distance from the surface of the test piece to the bottom surface of the ball is measured and taken as h1. Expressed as 100) x 100. The porosity was calculated by calculating the actual rate based on the unit volume weight test of JIS A 1104 and calculating it back.

【0056】

(Comparative Example 1) Using a polypropylene plain weave base fabric as a base material, straight yarn made of polypropylene film split yarn (fineness 10,000 dtex) is planted so that the length of the pile when stretched is 50 mm, and the base material is used. After applying SBR resin to the back surface, an artificial lawn made by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 46 kg / m of silica sand containing 50% by weight of a particle size distribution of 0.6 mm, which is a hard granular material, was added.²It was filled and filled to a height of about 30 mm of pile length (A) to form an artificial turf. At this time, the average upright height (B) of the protruding pile is in the upright state.

【0057】

The evaluation results are shown in Table 1.

【0058】

[table 1]

<img file="JP2003171908A_D0001.tif" />【0059】

As shown in Table 1, in Comparative Example 1, since the gaps between the piles are filled with silica sand, the shock absorption is poor, and because the piles are upright, the silica sands are likely to scatter from the gaps between the piles. In addition, the texture is hard because straight hair is used for the properties of the pile.

【0060】

Furthermore, since polypropylene resin is used as the material of the pile, the pile is easily worn and lacks durability.

【0061】

In Example 1, since the lower layer of the pile is quantitatively filled with silica sand and then the upper layer is quantitatively filled with elastic granules of rubber chips, it is excellent in shock absorption and further has an average upright height (B) of the protruding pile. Since it is finished by bending or bending it to a height of 40%, it has a great effect of preventing the movement of granules, and its texture is similar to that of natural lawn. Furthermore, since the pile is made of yolyset yarn, the texture is similar to that of natural grass as described above.

【0062】

Furthermore, since the pile material is nylon resin, it has excellent wear resistance. Further, since a base material having a structure in which a polypropylene plain weave base cloth is further laminated on a polypropylene plain weave base cloth with a non-woven fabric is used, the dimensional stability is extremely excellent. Therefore, an artificial turf ground that can withstand long-term use is obtained.

【0063】

(Example 2) Similar to Example 1, a twisted yarn made of nylon monofilament yarn (fineness 10,000 dtex) is placed on a base material obtained by superimposing a polypropylene plain weave base fabric on a polypropylene plain weave base cloth with a non-woven fabric. Is planted so that the length of the pile when stretched is 50 mm, SBR resin is applied to the back surface of the base material, and then the artificial lawn produced by solidifying by hot air drying is placed on the base base made of asphalt concrete. Was laid in. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. Subsequently, as a pile repair method, after sprinkling water in advance, 50 N / cm²Rolling while changing the bending or bending direction of the pile for each piece of cloth using a roller made of rubber tire with no unevenness, and finishing by bending or bending to a height of 40% of the average upright height (B) of the protruding pile. The structure of the artificial turf ground was obtained. The evaluation results are shown in Table 2.

【0064】

(Comparative Example 2) Similar to Comparative Example 1, an artificial lawn was laid, and then, as a pile repair method, water was sprinkled in advance and then 50 N / cm.²The structure of the finished artificial turf ground was obtained by rolling or curving to a height of 40% of the average upright height (B) of the protruding pile by rolling using a roller made of rubber tire with unevenness. The evaluation results are shown in Table 2.

【0065】

[Table 2]

<img file="JP2003171908A_D0002.tif" />【0066】

As shown in Table 2, in Comparative Example 2, as a pile repair method, the bending and bending directions are randomized by rolling using a roller made of a rubber tire with irregularities. On the other hand, in Example 2, the bending and bending directions of the pile are partially different to obtain a striped pattern, so that the appearance of the artificial lawn ground is similar to the striped contrast due to the cutting direction of the natural lawn. Obtained at.

【0067】

(Example 3) Similar to Example 1, nylon split yarn (fineness 10,000 dtex) is piled on a base material obtained by superimposing a polypropylene plain weave base cloth on a polypropylene plain weave base cloth with a non-woven fabric. Hair was planted so that the length when stretched was 50 mm, SBR resin was applied to the back surface of the base material, and then an artificial lawn made by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard particle, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. The pile protruding from the surface of the granules filled in the artificial turf was split into fibers using a flat plate with a needle. The evaluation results are shown in Table 3.

【0068】

(Comparative Example 3) Similar to Comparative Example 1, a straight yarn made of polypropylene film split yarn (fineness 10,000 dtex) using a polypropylene plain weave base fabric as a base material so that the length of the pile when stretched is 50 mm. After applying SBR resin to the back surface of the base material, an artificial lawn made by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. At this time, the protruding pile was unsplit.

【0069】

The evaluation results are shown in Table 3.

【0070】

[Table 3]

<img file="JP2003171908A_D0003.tif" />【0071】

In Example 3, the pile is finely divided by splitting the pile protruding from the surface of the granules filled in the artificial turf using a flat plate with a needle, the texture is closer to that of the natural lawn, and the frictional resistance is also increased. It becomes smaller and less likely to be scratched or burned.

【0072】

(Examples 4-1 and 4-2, 4-3) Similar to Example 1, a nylon film is formed on a base material obtained by superimposing a polypropylene plain weave base cloth on a polypropylene plain weave base cloth with a non-woven fabric. Asphalt concrete is an artificial lawn made by planting split yarn (fineness 10,000 dtex) so that the length of the pile when stretched is 50 mm, applying SBR resin to the back surface of the base material, and then solidifying it by hot air drying. It was laid on a base made of. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. Here, in Example 4-1 the surface of the film split yarn was scraped in the manufacturing process of the film split yarn as a pile of the artificial turf. In Example 4-2, 0.1% by weight of titanium oxide was added to the film raw material in the production process of the film split yarn. In Example 4-3, a monofilament yarn was used for the pile.

【0073】

(Comparative Example 4) Using a polypropylene plain weave base fabric as a base material, nylon film split yarn (fineness 10,000 dtex) is planted so that the length of the pile when stretched is 50 mm, and SBR type is applied to the back surface of the base material. After applying the resin, an artificial turf produced by solidifying by hot air drying was laid on a base base made of asphalt concrete. First, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. At this time, the protruding pile is untreated.

【0074】

As a method for evaluating shine, it was measured using a Lange gloss meter. Compared with Comparative Example 4, the glossiness was small in all of Examples 4-1, 4-2, and 4-3, and the effect of reducing the shine, that is, the reflection of light was obtained.

【0075】

(Example 5) Similar to Example 1, a nylon film split yarn (fineness 10,000 dtex) is piled on a base material obtained by superimposing a polypropylene plain woven base cloth on a polypropylene plain woven base cloth with a non-woven fabric. The hair was planted so that the length when stretched was 50 mm, SBR resin was applied to the back surface of the base material, and then an artificial lawn made by solidifying by hot air drying was laid on a base base made of asphalt concrete. .. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. Here, activated carbon was added in an amount of 8% by weight based on the elastic granules of the rubber chips in the layer of the elastic granules of the upper rubber chips.

【0076】

(Comparative Example 5) Nylon film split yarn (fineness 10,000 dtex) is applied to a base material in which a polypropylene plain weave base cloth is further overlaid on a polypropylene plain weave base cloth with a non-woven fabric, and the stretched length of the pile is 50 mm. After the hair was planted so as to be, SBR-based resin was applied to the back surface of the base material, and then an artificial lawn produced by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf, and no deodorant was added.

【0077】

In Comparative Example 5, the offensive odor of the rubber chips was strong under the scorching sun after laying, whereas in Example 5, the offensive odor was reduced by adding the deodorant, and a deodorizing effect was obtained.

【0078】

(Examples 6-1 and 6-2) Similar to Example 1, a nylon film split yarn (fineness) is formed on a base material obtained by superimposing a polypropylene plain weave base cloth on a polypropylene plain weave base cloth with a non-woven fabric. 10,000dtex) is planted so that the length of the pile when stretched is 50 mm, SBR resin is applied to the back surface of the base material, and then the artificial lawn made by solidifying by hot air drying is used as a base made of asphalt concrete. It was laid on the base. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. Here, in Example 6-1, elastic particles of rubber chips to which the flame retardant aluminum hydroxide was added were used as the upper layer granules. In Example 6-2, EPDM was used as the upper layer granular material.

【0079】

(Comparative Example 6) Nylon film split yarn (fineness 10,000 dtex) is applied on a polypropylene plain weave base cloth with non-woven fabric, and a polypropylene plain weave base cloth as a base material, and the length of the pile when stretched is 50 mm. After planting hair in this way and applying SBR resin to the back surface of the base material, an artificial lawn produced by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled to form upper layer granules, and the pile length was filled to a height of about 30 mm to form an artificial turf, and no flame retardant was added.

【0080】

Compared with Comparative Example 6, a flame retardant effect could be obtained in both Examples 6-1 and 6-2.

【0081】

(Example 7) Nylon monofilament yarn (fineness 10,000 dtex) is placed on a polypropylene plain weave base cloth with a non-woven fabric and then on a polypropylene plain weave base cloth, and the length of the pile when stretched. The hair was planted so that the size was 50 mm, SBR resin was applied to the back surface of the base material, and then an artificial lawn made by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. At this time, the color tone of the pile of the artificial turf was laid alternately as a dark green cloth and a light green cloth.

【0082】

(Comparative Example 7) The color tone of the pile of the artificial turf used in Example 7 was laid with a single color of light green cloth.

【0083】

In contrast to Comparative Example 7, in Example 7, the color tone of the pile of the artificial turf was laid alternately as a dark green cloth and a light green cloth, so that the contrast of the stripes depending on the cutting direction of the natural lawn ground was obtained. Can be obtained even on an artificial lawn ground, and the contrast close to that of a natural lawn can be permanently maintained, so that the maintenance cost required for the natural lawn can be significantly reduced.

【0084】

(Example 8) Similar to Example 1, a twisted yarn made of nylon monofilament yarn (fineness 10,000 dtex) is placed on a base material obtained by superimposing a polypropylene plain weave base fabric on a polypropylene plain weave base cloth with a non-woven fabric. Is planted so that the length of the pile when stretched is 50 mm, SBR resin is applied to the back surface of the base material, and then the artificial lawn produced by solidifying by hot air drying is placed on the base base made of asphalt concrete. Was laid in. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 80% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. Subsequently, as a pile repair method, after sprinkling water in advance, 50 N / cm²The structure of the finished artificial turf ground was obtained by rolling or curving to a height of 40% of the average upright height (B) of the protruding pile by rolling using a roller made of rubber tire with unevenness. The evaluation results are shown in Table 4.

【0085】

(Comparative Example 8) Similar to Comparative Example 1, a straight yarn made of polypropylene film split yarn (fineness 110,000 dtex) using a polypropylene plain weave base fabric as a base material has a length of 50 mm when the pile is stretched. After applying SBR resin to the back surface of the base material, an artificial lawn produced by solidifying by hot air drying was laid on a base base made of asphalt concrete. Subsequently, in the gaps between the piles of the artificial turf, 23 kg / m of silica sand containing 70% by weight or more of a particle size distribution of 0.6 mm, which is a hard granular material, was first formed.²7 kg / m of elastic granules of rubber chips containing 70% by weight or more of 0.7 mm particle size distribution on top of the lower layer granules.²It was filled into upper layer granules and filled to a height of about 30 mm in pile length to form an artificial turf. After this, as a pile repair method, 50 N / cm without sprinkling water.²The structure of the finished artificial turf ground was obtained by rolling or curving to a height of 40% of the average upright height (B) of the protruding pile by rolling using a roller made of rubber tire with unevenness.

【0086】

The evaluation results are shown in Table 4.

【0087】

[Table 4]

<img file="JP2003171908A_D0004.tif" />【0088】

As shown in Table 4, Comparative Example 8 requires 100 reciprocating compactions because the rollers are compacted without sprinkling water as a pile repair method. In contrast, in Example 8, as the pile repair method, since water is sprinkled in advance and then the roller is rolled, it is possible to obtain bending or bending of the pile within a specific range by rolling 20 times back and forth.

【0089】

[Effect of the invention]

According to the present invention, it is possible to significantly improve the texture, scattering and movement of granules, as well as the rolling property of the ball, shock absorption performance, odor problem, etc., so that it can be provided to the ground including hockey competition. it can.

[Simple explanation of drawings]

[Figure 1]

It is schematic cross-sectional view which shows the state which laid the artificial turf ground which concerns on one Embodiment of this invention on the base base.

[Figure 2]

It is schematic cross-sectional view which shows the state of the filling granular material layer of the artificial turf ground which concerns on one Embodiment of this invention.

[Fig. 3]

It is a schematic diagram which shows the pile settling direction, that is, the striped pattern after bending or bending of the pile of the artificial turf ground which concerns on one Embodiment of this invention.

[Fig. 4]

It is a schematic diagram which shows the striped pattern in which the pile of the artificial turf ground which concerns on one Embodiment of this invention is partially colored in a different color tone.

[Fig. 5]

It is schematic cross-sectional view which shows the state which the protruding pile of the artificial turf ground which concerns on one Embodiment of this invention is physically split by the flat plate with a needle.

[Fig. 6]

It is schematic cross-sectional view which shows the bending or bending state of the pile by the rolling roller at the time of manufacturing the artificial turf ground which concerns on one Embodiment of this invention.

[Fig. 7]

It is schematic cross-sectional view which shows the state which prevents the outflow of the filled granules of the artificial turf ground which concerns on one Embodiment of this invention.

[Explanation of symbols]

1: Artificial turf ground structure 2: Artificial turf 3: Pile 4: Granules 5: Base material 6: Base base 7: Pile settling direction 8: Cloth 9:10: Pile unique color cloth 11: Flat plate with needle 12: Roller 13: Granule outflow member A: Pile length B: Protruding pile length C: Bending / bending height 4U: Upper soft filler 4D: Underlayer hard filler