WO2019021837A1 - Elastic particulates, manufacturing method for same, artificial turf and paved body using same, and manufacturing method for these - Google Patents

Abstract

Provided are elastic particulates that: can be used as filler for artificial turf, paved bodies, road pavement, or the like; have high infrared reflectivity and can sufficiently inhibit increases in surface temperature of artificial turf or the like; can inhibit reflection of visible light; and can prevent dispersion, runoff, and floating due to wind and rain. Also provided is a manufacturing method for same. A specific gravity of 0.9 or greater is achieved by including, for example, a black infrared reflective inorganic pigment containing metal elements of titanium, manganese, and calcium in an elastic filler formed from thermoplastic elastomers and adding an extender pigment such as calcium carbonate, barium sulfate, or the like as required. In the present invention, formation involves mixing the thermoplastic elastomer, the black infrared reflective inorganic pigment, etc., at least.

Description

Elastic granular material and method of manufacturing the same, artificial lawn using the same, pavement, and method of manufacturing the same

The present invention relates to elastic particles and a method for producing the same. In addition, the present invention relates to an artificial lawn, a pavement, a pavement and a method of manufacturing them using the same.

Conventionally, lawns are used for exercise facilities such as tennis, football, baseball, rugby, hockey, futsal, American football, athletics, golf driving ranges, etc. However, artificial lawns are easier to manage than natural lawns. Is widely used. However, such artificial turf is inferior to natural turf in shock absorption performance, so it may cause knee joint failure during many years of competition for athletes, or cause serious injuries when falling etc. Do. Therefore, in recent years, in order to improve the impact absorbability of artificial turf, artificial turf in which particles are filled between turf (pile) is used. For example, Patent Document 1 discloses filling a mixture of hard particles and soft particles between turf (pile) implanted in a substrate. In the embodiment, specifically, silica sand particles having a particle diameter of 0.07 to 1.2 mm are used as hard particles, and natural rubber chip particles having a particle diameter of 0.5 to 2.5 mm are used as soft particles. There is. However, although the particles filled between such turf (pile) have shock absorption, they are easy to absorb sunlight, and moreover, since the air is contained in the gaps between the particles, the absorbed heat is difficult to be dissipated. Because the surface temperature of the artificial grass becomes high, the competition environment is greatly impaired.

Therefore, in Patent Document 2, a near infrared reflection layer is formed on the surface of the rubber chip particles and disposed on the surface of the artificial grass, whereby the artificial grass is laid in a place receiving radiant heat from sunlight or the like. , It has been confirmed that the surface temperature of the artificial lawn is lowered and the comfort is not lowered. In the patent document, metal oxides such as TiO ₂ , ZnO, ZnAl ₂ O _{4 and the} like having a particle diameter of 0.01 to 500 μm and flaky minerals such as mica are used as near infrared reflectors to be used. An article having a high brightness, such as a coated article, is described. Moreover, in patent document 3, calcium carbonate and titanium oxide are mix | blended with a thermoplastic elastomer, true-specific gravity is 1 or more, and an elastic granular material having a solar reflectance of 60% or more is formed. It describes filling between threads (pile).

Unexamined-Japanese-Patent No. 2004-211448 Unexamined-Japanese-Patent No. 2006-124984 Patent No. 5238415 publication gazette

In the above-mentioned prior art, a near infrared reflector such as a titanium oxide pigment having high brightness is formed on the surface or inside of the rubber chip, so the surface temperature of the artificial lawn hardly rises, but the near infrared reflector There is a problem that it is easy to exfoliate from the surface and the effect decreases. Moreover, since the white pigment which has high brightness, such as a titanium dioxide, is used as a near-infrared reflecting agent, the problem that visible light is reflected and glare is also produced. On the other hand, in the case of using a tire chip processed with waste automobile tires, window frame waste rubber, etc. as a rubber chip, since black carbon black etc. is blended, even if a near infrared reflection layer is formed, absorption of sunlight is Since it arises, there also exists a problem that control of the surface temperature of artificial turf is not enough.

As a result of intensive studies aimed at solving the above problems, the present inventors have found that at least the black infrared reflective inorganic material is contained in elastic granules (i.e., elastic granules of a thermoplastic elastomer molding) obtained by molding a thermoplastic elastomer. By using an elastic granular material containing a pigment and having a specific gravity of 0.9 or more, an increase in surface temperature of the artificial lawn can be sufficiently suppressed, and since it is black, reflection of visible light can be suppressed, and the specific gravity is Since it is large, it finds out that scattering, runoff, and water floating by wind and rain etc. can be prevented, and the present invention was completed.

That is, the present invention
(1) An elastic particle having at least a black infrared reflective inorganic pigment in an elastic particle obtained by forming a thermoplastic elastomer and having a specific gravity of 0.9 or more,
(2) An artificial lawn in which the elastic granular material according to (1) is filled between turf
(3) A method of producing an elastic particle, comprising kneading and molding a thermoplastic elastomer and at least a black infrared reflective inorganic pigment,
(4) A method of manufacturing an artificial lawn, etc., in which the elastic granular material according to the above (1) is filled between turf yarns.

Specifically, the present invention includes the following inventions (1) to (16).
(1) An elastic particle containing at least a black infrared reflective inorganic pigment in an elastic particle obtained by forming a thermoplastic elastomer and having a specific gravity of 0.9 or more.
(2) The elastic granular material according to (1), which contains 0.1 to 10% by mass of the black infrared reflective inorganic pigment.
(3) The elastic granular material according to (1) or (2) above, wherein the black infrared reflective inorganic pigment is a pigment containing at least a metal element of titanium, manganese and calcium.
(4) The elastic granular material according to any one of the above (1) to (3), further comprising an extender pigment.
(5) The elastic granular material according to the above (4), wherein the extender pigment is at least one selected from calcium carbonate, barium sulfate, titanium dioxide, silicon oxide, aluminum oxide, zirconium oxide and talc.
(6) The elastic granular material according to (4) or (5), containing 0.1 to 70% by mass of an extender pigment.
(7) The elastic granular material according to any one of the above (1) to (6), which has a particle size of 1 to 20 mm.
(8) An artificial lawn in which the elastic granular material according to any one of the above (1) to (7) is filled between turf yarns.
(9) A pavement made of the elastic granular material according to any one of the above (1) to (7) filled in a part of the pavement.
(10) A pavement with the elastic granular material according to any one of the above (1) to (7) filled in a part of the pavement.
(11) A method of producing elastic granules, wherein at least a thermoplastic elastomer and a black infrared reflective inorganic pigment are kneaded and molded.
(12) The method for producing an elastic granular material according to the above (11), wherein at least the thermoplastic elastomer, the black infrared reflective inorganic pigment, and the extender pigment are kneaded and molded.
(13) A method for producing an artificial lawn, wherein the elastic granular material according to any one of the above (1) to (7) is filled between turf yarns.
(14) A turf is planted in a base fabric, and the elastic granular material according to any one of the above (1) to (7) is filled between the sown turf to provide a granular material layer. It is a method of manufacturing an artificial lawn.
(15) A method for producing a pavement, wherein the elastic granular material according to any one of (1) to (7) is filled in a part of the pavement.
(16) A method for producing a pavement, wherein the elastic granular material according to any one of (1) to (7) is filled in a part of the pavement.

The elastic granules of the present invention have high infrared reflectivity since they contain at least a black infrared reflective inorganic pigment inside the elastic granules obtained by molding a thermoplastic elastomer, and furthermore, they are black to reflect visible light. It can also be suppressed. In addition, since the specific gravity of the elastic granular material can be easily adjusted to 0.9 or more by adjusting the amount of the black infrared reflective inorganic pigment to be blended in the elastic granular material, the elastic granular material can be It can prevent spilling, splashing, and floating. Moreover, this prevention can be more effectively performed by adjusting the particle diameter of the elastic granular material of this invention suitably.
When the above elastic particles are used by filling them between tufts (pile) implanted in a base material of artificial lawn, the elastic particles are formed of a thermoplastic elastomer, so that the thermoplastic elastomer causes impact. Since the infrared reflectiveness becomes high due to the black infrared reflective inorganic pigment mixed with the elastic particles, the surface temperature of the artificial grass to which it is applied is raised, while the absorption performance is improved and the safety becomes excellent. In addition, since it is black, reflection of visible light can be suppressed. Moreover, since the specific gravity of the elastic granular material can be easily adjusted to 0.9 or more, when filled into artificial lawns, pavements such as exercise equipment, pavements of roads, etc., outflow or scattering of elastic granular materials due to wind and rain etc. , Can prevent floating.
The elastic granular material can be easily produced by kneading and molding at least a thermoplastic elastomer and a black infrared reflective pigment. Further, the above-mentioned artificial lawn can be easily manufactured by filling the above-mentioned elastic granular material between tufts (piles).

The present invention is an elastic particle containing at least a black infrared reflective inorganic pigment in an elastic particle obtained by forming a thermoplastic elastomer, and having a specific gravity of 0.9 or more. The elastic granules have flexibility and excellent impact absorption because they use a thermoplastic elastomer as an elastic material. The degree of blackness of the elastic granular material can be adjusted by the type and amount of addition of the black infrared reflective inorganic pigment, and is preferably 30 or less, preferably 25 or less, as represented by the L ^* value of CIE 1976 L ^* a ^* b ^* color space. More preferably, 15 or less is more preferable. The infrared reflectivity of the elastic particles can be adjusted with a black infrared reflective inorganic pigment, and is preferably 20% or more, more preferably 30% or more, and more preferably 35% or more in terms of solar reflectance (780 nm to 2,500 nm) Is most preferred. The specific gravity of the elastic granular material can be adjusted to 0.9 or more by the combination of the black infrared reflective inorganic pigment and the extender pigment. The specific gravity of the elastic granular material is preferably 1 or more, more preferably 1.1 to 2.0 (1.1 or more and 2.0 or less), 1.3 to 1.8 (1.3 or more and 1.8 or less) Is more preferred. If the specific gravity is in the above-mentioned range, it is possible to prevent the elastic granular material from flowing out, scattering, or floating in water due to wind or rain.

The particle diameter of the elastic granular material can be appropriately adjusted, and for example, it is 0.5 to 20 mm (0 .5 mm or more and 20 mm or less) is preferable, 1 to 20 mm (1 mm or more and 20 mm or less) is more preferable, 1 to 10 mm (1 mm or more and 10 mm or less) is more preferable, and 1 to 5 mm (1 mm or more and 5 mm or less) is further more preferable. If the particle size is in the above-mentioned range, it is possible to prevent the outflow, scattering, and floating of the elastic particles due to wind and rain. The shape of the elastic granular material can be appropriately adjusted, and is preferably in the shape of a tip such as a cylindrical or square pole, and may be spherical, disc, square, hexagonal or the like depending on the application situation.

Thermoplastic elastomers have the property of softening to show fluidity when heat is applied, and returning to rubbery state when cooled, such as styrenics, olefins / alkenes, vinyl chlorides, urethanes, amides, etc. Can be mentioned. This has the advantage that it can be rapidly molded by injection molding.

The black infrared reflective inorganic pigment added to the elastic particles may be black, and may be reddish, bluish or greenish. The degree of blackness is preferably 35 or less, more preferably 30 or less, still more preferably 25 or less, as represented by an L ^* value in the CIE 1976 L ^* a ^* b ^* color space. The infrared reflectivity of the inorganic pigment is preferably 30% or more, more preferably 40% or more, and still more preferably 45% or more in terms of solar reflectance (780 to 2,500 nm). The compounding quantity of the black infrared reflective inorganic pigment in an elastic granular material can be set up suitably, for example, 0.1-10 mass% (0.1 mass% or more and 10 mass% or less) is preferable, 0.2-7 mass. % (0.2 to 7% by mass) is more preferable, and 0.5 to 5% by mass (0.5 to 5% by mass) is more preferable. The black infrared reflective inorganic pigment is preferably uniformly present inside the elastic particles, and may be present on the surface besides the inside of the elastic particles.

Examples of such black infrared reflective inorganic pigments include Fe-Cr based oxides, Co-Al based oxides, Ti based lower oxides, Ti based nitrides, Ti-Mn-Ca based oxides, etc. A pigment containing at least a metal element of titanium, manganese and calcium is preferable because of its high blackness and high infrared reflectivity, and a compound represented by xCaTiO ₃ · (1-x) CaMnO ₃ (0 <x <1) is more preferable. In addition, the black infrared reflective pigment containing at least a metal element of titanium, manganese or calcium may contain another metal element, and for example, it is more preferable to contain an aluminum element and / or a bismuth element. When the aluminum element is contained, the content thereof is an atomic ratio (molar ratio) to the sum of the contents of titanium element (Ti) and manganese element (Mn), that is, [Al] / ([Ti] + 0.1 or less is preferable when it represents with Mn]), and the quantity which becomes 0.01 <= [Al] / ([Ti] + [Mn]) <= 0.1 is more preferable. Here, [Al] represents the number of moles of the aluminum element, [Ti] represents the number of moles of the titanium element, and [Mn] represents the number of moles of the manganese element. When the bismuth element is contained, the content thereof is an atomic ratio (molar ratio) to a sum of the content of titanium element (Ti) and the content of manganese element (Mn), that is, [Bi] / ([Ti 0.1 or less is preferable when it represents with + [Mn], and the quantity which becomes 0.002 <= [Bi] / ([Ti] + [Mn]) <= 0.02 is more preferable. Here, [Bi] represents the number of moles of bismuth element, [Ti] represents the number of moles of titanium element, and [Mn] represents the number of moles of manganese element. When [Bi] / ([Ti] + [Mn]) is 0.002 or more, the effect of improving the acid resistance of the black infrared reflective pigment is clearly recognized.

The elastic particles can include an extender pigment in addition to the black infrared reflective inorganic pigment. The extender pigment is for increasing the specific gravity of the elastic particles, and at least one selected from calcium carbonate, barium sulfate, titanium dioxide, silicon oxide (silica), aluminum oxide, zirconium oxide and talc is preferably used. The content of the extender pigment in the elastic granular material is preferably 0.1 to 70% by mass (0.1% to 70% by mass), and 0.1 to 50% by mass (0.1% to 50% by mass) Or less) is more preferable, 1 to 30% by mass (1 to 30% by mass) is further preferable, and 5 to 20% by mass (5 to 20% by mass) is most preferable. The extender pigment may be uniformly present inside and on the surface of the elastic particles, or may be present abundantly inside the elastic particles. In order to increase the specific gravity of the elastic granular material, additives such as silica sand, gypsum, cement, aggregate and the like may be added as appropriate. Furthermore, in order to enhance the degree of blackness, another kind of black pigment (without infrared ray reflective ability) may be blended.

In the method for producing an elastic granular material of the present invention, at least a thermoplastic elastomer and a black infrared reflective inorganic pigment, and optionally a volume pigment and the like are kneaded and molded. The thermoplastic elastomer is softened by heating and exhibits fluidity, so that the thermoplastic elastomer having black fluidity and the black infrared reflective inorganic pigment may be mixed by heating, or the thermoplastic elastomer and the black infrared reflective inorganic You may knead | mix while heating with a pigment etc. As the kneader, kneaders such as a kneader and a rotary mixer can be used.
Next, the obtained kneaded product is formed into an appropriate size to produce elastic granules. As the molding machine, molding machines such as extrusion molding and injection molding can be used. The obtained molded product may be dried if necessary. In this manner, the black infrared reflective inorganic pigment can be present inside the elastic granular material, and the shape, particle size, etc. can be appropriately adjusted.

Next, the filler for artificial turf according to the present invention is one obtained by filling the above elastic granular material between tufts (pile). A conventional artificial turf can be used, and it is manufactured by planting artificial turf (pile) made of resin, such as polypropylene and polyethylene, with respect to a base cloth by a suitable method. The elastic granules of the present invention are filled between the tufts (pile). The amount of elastic particles can be set appropriately, preferably to the extent that a packed bed is formed, and the total amount of elastic particles and rigid particles described below is generally about half the height of artificial turf (pile) The amount to be filled in the thickness is more preferable. In the case of a two-layered structure of an elastic particle layer filled with elastic particles according to the present invention and a rigid particle layer filled with rigid particles such as silica sand, the elastic particle layer is a rigid particle which is the lower layer. It is preferable that the layer be sufficiently covered and the thickness be such that it reflects sunlight, for example, if the total amount of the packed layer is 6 cm, about 0.6 to 1.2 cm of them is more preferably the elastic granular material layer . Such artificial turf can be manufactured by filling the elastic granular material between turf threads (pile) by a conventional method, and turf threads (pile) are implanted in the base cloth and It is preferable to fill the above-mentioned elastic granular material between the turf yarns (pile) to provide a granular material layer.

Next, the pavement of the present invention is obtained by filling the elastic granular material described above in a part of the pavement such as an exercise facility. Polyurethane rubber chips and the like are used for pavements of athletic facilities such as athletic fields and golf courses, but instead, elastic granules of the present invention are used. The structure of the elastic pavement part of the athletic field is from the surface embossed top layer (0.8 to 3 mm), overcoat layer (2 to 4 mm), elastic base layer (8 to 10 mm), ascon layer (40 to 70 mm) And quarries (100 to 150 mm). The embossed top layer and the elastic base layer are then filled with the elastic particles of the present invention. The filling amount of the elastic particles can be set appropriately, and the degree of forming a layer, that is, the degree of forming a filled layer is preferable. Such a pavement can be manufactured by filling the elastic granular material into a part of a pavement such as a moving facility by a conventional method. At the time of filling, the elastic particles may be heated.

Next, the pavement according to the present invention is obtained by filling the elastic granular material in a part of the pavement of the road. As the pavement of the road, asphalt, interlocking blocks and the like are used, and polyurethane rubber chips and the like may be used as well as the pavement of the exercise facility. Instead, they use the elastic granules of the present invention, and the surface layer of the pavement is filled with the elastic granules of the present invention. As a pavement, in addition to roads, it can be applied to roads such as parks, facilities, parking lots, railroad crossings, piers, etc. It can also be applied to lids of manholes in pavements. The filling amount of the elastic particles can be set as appropriate, and the degree to which the filling layer is formed is preferable. Such pavements can be manufactured by filling the elastic granules in a part of the pavement of the road by a conventional method. At the time of filling, the elastic particles may be heated.

When the elastic granular material of the present invention is filled in the above-mentioned artificial lawn, pavement, pavement or the like, a commonly used color pigment, aggregate, cement or the like may be used in combination.

The elastic granular material of the present invention has high infrared reflectivity and can suppress reflection of visible light because it is black. Therefore, the elastic granular material can be used for various applications besides artificial lawns, pavements and pavements. For example, it can be laid on the roof of a building whose surface temperature tends to be high, or fixed to a roof or a wall. Moreover, it can apply also to structures, such as a bridge, and facilities, such as a station, an airport, and a port.

The present invention will be described in more detail by way of the following examples. However, the scope of the present invention is not limited to only these examples.

Example 1
In a mixer, a thermoplastic elastomer (styrene-based resin elastomer) and a black infrared reflective inorganic pigment (SG-101 x CaTiO ₃ · (1-x) CaMnO ₃ (compound represented by 0 <x <1) manufactured by Ishihara Sangyo Co., Ltd.) 1 The mixture was heated and kneaded in an amount of 0% by mass, and then extruded into a cylindrical shape having a diameter of about 2 mm by an extrusion molding machine to obtain a cylindrical molded product (sample A) cut to a length of about 2 to 3 mm.

Example 2
In a mixer, 1.0% by mass of a thermoplastic elastomer and a black infrared reflective inorganic pigment (a compound represented by SG-101 x CaTiO ₃ · (1-x) CaMnO ₃ (0 <x <1) manufactured by Ishihara Sangyo Co., Ltd.) and carbonate 49% by mass of calcium was heat-kneaded, and then extruded into a cylindrical shape having a diameter of about 2 mm by an extruder, to obtain a cylindrical molded product (sample B) cut to a length of about 2 to 3 mm.

Example 3
In a mixer, 1.0% by mass of a thermoplastic elastomer and a black infrared reflective inorganic pigment (a compound represented by SG-101 x CaTiO ₃ · (1-x) CaMnO ₃ (0 <x <1) manufactured by Ishihara Sangyo Co., Ltd.) and carbonate Twenty-four mass% of calcium was heat-kneaded, and then extruded into a cylindrical shape having a diameter of about 2 mm by an extruder, to obtain a cylindrical molded product (sample C) cut to a length of about 2 to 3 mm.

Example 4
In a mixer, 1.0 mass% of a thermoplastic elastomer and a black infrared reflective inorganic pigment (a compound represented by SG-101 x CaTiO ₃ · (1-x) CaMnO ₃ (0 <x <1) manufactured by Ishihara Sangyo Co., Ltd.) and sulfuric acid Twenty-four mass% of barium was heated and kneaded, and then extruded into a cylindrical shape with a diameter of about 2 mm by an extruder, to obtain a cylindrical molded product (Sample D) cut into lengths of about 2-3 mm.

Comparative Example 1
In a mixer, the thermoplastic elastomer and 1.0% by mass of carbon black (blackness L ^{* =} 7, solar reflectance 6%) are heat-kneaded, and then extruded into a cylindrical shape with a diameter of about 2 mm by an extruder. A cylindrical molded product (sample E) cut into a length of about 2 to 3 mm was obtained.

Table 1 shows the results of evaluating the flexibility, specific gravity, low visible light reflectivity, blackness, solar radiation reflectance, and surface temperature of the samples obtained in Examples and Comparative Examples. The evaluation of the flexibility was made by crushing the prepared sample with a finger tip and judging whether it had a good flexibility in its feel of touch. The specific gravity was measured using the underwater substitution method of JIS K7112. Low visible light reflectivity observed the sample in the place where the sunlight was irradiated outdoors. The degree of blackness was evaluated by the L ^* value of the CIE 1976 L ^* a ^* b ^* color space. For solar radiation reflectance (wavelength 780 to 2,500 nm), a sheet-like sample is prepared from a raw material having the same composition as that of the elastic granular material, and an ultraviolet, visible, and near infrared spectrophotometer UV-3150 manufactured by Shimadzu Corporation is used. It measured by the method based on A 5759. The surface temperature was evaluated by placing 120 g of the prepared sample in a plastic tray (thickness 1 cm), irradiating the infrared lamp from the top 47 cm, and measuring the surface temperature after 60 minutes.

It was confirmed that the sample of the example had a black infrared reflective inorganic pigment and an extender pigment inside. Further, as shown in Table 1, the samples of the examples had good flexibility and low visible light reflectivity, and the specific gravity was 0.9 or more. The solar reflectance and the degree of blackness were good, and a temperature difference of about 10 ° C. was also confirmed for the surface temperature as compared with the comparative example. On the other hand, in Comparative Example 1, it was confirmed that the solar radiation reflectance was low and the surface temperature was also high.

As artificial turf, make a square of 200 mm × 130 mm respectively, and fill No. 6 silica sand (use amount: 30 kg / m ² ) between turf of long pile artificial turf (material: polyolefin, turf height: 63 mm), A sample was prepared so as to have a two-layer structure of particles of silica sand and rubber chips filled with Example 1 and Example 2 (amount used: 11 kg / m ² ) thereon.
The impact absorptivity, low visible light reflectivity, and surface temperature of the artificial grass samples obtained in the Examples and Comparative Examples were evaluated. The results are shown in Table 2. The evaluation of shock absorption was judged by the feel of the prepared sample while leaving it in leisure time and stepping on it. Low visible light reflectivity observed the sample in the place where the sunlight was irradiated outdoors. The surface temperature was evaluated by placing the prepared sample on a desk, irradiating an infrared lamp from the upper 47 cm, and measuring the surface temperature after 60 minutes.

The elastic granular material of the present invention has high infrared reflectivity, can sufficiently suppress an increase in the surface temperature of an artificial turf or the like to which it is applied, and can suppress reflection of visible light because it is black. Since it can prevent scattering, runoff, and floating due to wind and rain, it can be used as a filler for artificial lawns, pavements, road pavements and the like.

Claims (16)

1. An elastic particle comprising at least a black infrared reflective inorganic pigment in an elastic particle obtained by molding a thermoplastic elastomer and having a specific gravity of 0.9 or more.
2. The elastic granular material according to claim 1, comprising 0.1 to 10% by mass of the black infrared reflective inorganic pigment.
3. The elastic granular material according to claim 1 or 2, wherein the black infrared reflective inorganic pigment is a pigment containing at least a metal element of titanium, manganese and calcium.
4. The elastic granular material according to any one of claims 1 to 3, further comprising an extender pigment.
5. The elastic granular material according to claim 4, wherein the extender pigment is at least one selected from calcium carbonate, barium sulfate, titanium dioxide, silicon oxide, aluminum oxide, zirconium oxide and talc.
6. The elastic granular material according to claim 4 or 5, comprising 0.1 to 70% by mass of an extender pigment.
7. The elastic granular material according to any one of claims 1 to 6, which has a particle size of 1 to 20 mm.
8. An artificial turf in which the elastic granular material according to any one of claims 1 to 7 is filled between turf yarns.
9. A paving body in which the elastic granular material according to any one of claims 1 to 7 is filled in a part of the paving body.
10. A pavement with the elastic granular material according to any one of claims 1 to 7 filled in a part of the pavement.
11. A method of producing elastic particles, comprising kneading and molding at least a thermoplastic elastomer and a black infrared reflective inorganic pigment.
12. The manufacturing method of the elastic granular material of Claim 11 which knead | mixes and shape | molds a thermoplastic elastomer, a black infrared rays reflective inorganic pigment, and an extender pigment at least.
13. A method of manufacturing an artificial lawn, wherein the elastic granular material according to any one of claims 1 to 7 is filled between turf threads.
14. A synthetic turf comprising a turf yarn planted in a base fabric, and the elastic tufted material according to any one of claims 1 to 7 being filled between the above-mentioned turf yarn threads to provide a granular material layer. Method.
15. A method for producing a pavement, wherein a part of the pavement is filled with the elastic granular material according to any one of claims 1 to 7.
16. A method for producing a pavement according to any one of claims 1 to 7, wherein the elastic granules are filled in part of the pavement.