JPH09242011A - Recyclable artificial lawn - Google Patents
Recyclable artificial lawnInfo
- Publication number
- JPH09242011A JPH09242011A JP5327696A JP5327696A JPH09242011A JP H09242011 A JPH09242011 A JP H09242011A JP 5327696 A JP5327696 A JP 5327696A JP 5327696 A JP5327696 A JP 5327696A JP H09242011 A JPH09242011 A JP H09242011A
- Authority
- JP
- Japan
- Prior art keywords
- nylon
- artificial
- artificial grass
- pile
- artificial lawn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Road Paving Structures (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リサイクルの容易
な人工芝に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial grass that can be easily recycled.
【０００２】[0002]
【従来の技術】近年、人工芝はベランダや家の庭、公園
などからテニスコート、サッカー場、野球場、ホッケー
場、屋内や屋外の多目的グランド等各種のスポーツ施設
まで、大量に使用されてきている。ベランダや屋内グラ
ンドのように砂無しでカーペットのように使用される場
合やテニスコートや野球場、サッカー場のように砂入り
の状態で使用されたり、多様な使用状態がある。それら
が、比較的安価に敷設できる事やメンテナンスフリーで
維持費用が低いこと、さらには天然の美観に近いことが
あり、その使用量は年々増大の傾向にある。最近では製
造業者の努力で耐久性向上技術が進歩し、また品質改善
が進み、耐久性が大幅に向上し、かなりの長期に渡って
使用が可能になってきた。しかし、いずれにせよ、使用
により摩耗や光、水、温度の影響を受け、劣化が進むも
のであり、現在の人工芝では、その耐用年数は８〜１０
年程度が一般的である。したがって、長期に使用が可能
とは言え、敷設して１０年も経つと新品への張り替えが
必要となってくる。その時に問題になるのは使用済人工
芝の廃棄方法である。現状では産業廃棄物として埋没し
ているが、埋没場所に埋没させることも無制限には続け
られるものではなく、すでにこの廃棄方法が大きな社会
問題となってきている。かかる問題の対策として、リサ
イクルの方法として、摩耗した人工芝をそのまま川の堤
防や河川敷、山間の道路際の防草用として敷設すること
も提案されている。2. Description of the Related Art In recent years, artificial turf has been used in large quantities in balconies, home gardens, parks, tennis courts, soccer fields, baseball fields, hockey fields, and various sports facilities such as indoor and outdoor multipurpose grounds. There is. When used like a carpet without sand, such as on a veranda or indoor ground, and used with sand, such as on a tennis court, baseball field, or soccer field, there are various usage conditions. Since they can be laid relatively inexpensively, they are maintenance-free and maintenance costs are low, and they have a natural appearance, their usage tends to increase year by year. In recent years, due to the efforts of manufacturers, durability improvement technology has advanced, quality improvements have progressed, durability has improved significantly, and it has become possible to use it for a considerable period of time. However, in any case, it deteriorates due to wear, light, water, and temperature due to use, and with the current artificial grass, the service life is 8 to 10
Years are common. Therefore, although it can be used for a long period of time, it will be necessary to replace it with a new one 10 years after it has been laid. The problem at that time is how to dispose of used artificial grass. At present, it is buried as industrial waste, but it is not possible to continue burying it in a buried place indefinitely, and this disposal method has already become a major social problem. As a measure against such a problem, it has been proposed as a recycling method to lay down worn artificial turf as it is for river banks, riverbeds, and weed control on mountain roads.
【０００３】[0003]
【発明が解決しようとする課題】しかし、古い人工芝は
外観の問題やまた敷設したい時に敷設したいだけ準備で
きるということもなく、敷設したい側から見れば単なる
廃棄場所の提供に過ぎない感がある。すなわち人工芝の
現物でのリサイクルはその廃棄量と再使用量のバラン
ス、その輸送や美観の問題があり、そのシステマティッ
クなリサイクルの実現は難しい状況である。However, old artificial grass does not have a problem of appearance and can be prepared only when it is desired to be laid, and there is a feeling that it is merely a disposal site when viewed from the side of laying. . In other words, the recycling of artificial turf in the actual situation has problems of balance between the amount of waste and the amount of reuse, its transportation and aesthetics, and it is difficult to realize systematic recycling.
【０００４】本発明は、かかる砂入りあるいは砂無しの
人工芝として、リサイクル容易な人工芝を提供せんとす
るものである。The present invention provides an artificial grass that can be easily recycled as such an artificial grass with or without sand.
【０００５】[0005]
【課題を解決するための手段】本発明は、上述の課題を
解決するために次の手段を提案するものである。すなわ
ち、本発明のリサイクル可能な人工芝は、人工芝を構成
する全ての部材が、ナイロン６を素材とするものである
ことを特徴とするものである。The present invention proposes the following means in order to solve the above-mentioned problems. That is, the recyclable artificial grass of the present invention is characterized in that all the members constituting the artificial grass are made of nylon 6.
【０００６】[0006]
【発明の実施の形態】本発明は、人工芝のリサイクル問
題について、鋭意検討したところ、人工芝の全ての部材
を同一素材で構成することに着目して、その素材とし
て、ナイロン６という特定なポリマを使用したところ、
意外にも、耐摩耗性、耐フィブリル化性に優れる成形品
を与える上に、解重合反応性に優れている特徴を発揮
し、簡単容易にリサイクル可能な人工芝を提供すること
ができることを究明したものである。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, as a result of diligent research on the problem of recycling artificial turf, attention is paid to the fact that all members of the artificial turf are made of the same material, and as a material therefor, a specific material called nylon 6 is used. When I used a polymer,
Surprisingly, it was clarified that it is possible to provide artificial turf that can be easily and easily recycled, in addition to providing molded products with excellent abrasion resistance and fibrillation resistance, as well as exhibiting characteristics of excellent depolymerization reactivity. It was done.
【０００７】本発明のリサイクル可能な人工芝は、構成
部材全てをナイロン６で統一したところに特徴を有する
ものである。すなわち、一般にパイル素材にはポリプロ
ピレン、ポリエチレン、ナイロン６、６６、塩化ビニリ
デン、ナイロン共重合物、ポリエステル等を利用できる
が、本発明のリサイクルを行う目的からパイル素材とし
てはナイロン６ポリマからなるパイルを用いるものであ
る。The recyclable artificial grass of the present invention is characterized in that all the constituent members are made of nylon 6. That is, generally, polypropylene, polyethylene, nylon 6,66, vinylidene chloride, nylon copolymer, polyester, etc. can be used as the pile material, but for the purpose of recycling according to the present invention, a pile made of nylon 6 polymer is used. It is used.
【０００８】本発明においては人工芝のパイルの形状に
ついては特に限定されるものでない。即ち、パイルはモ
ノフィラメントでも、フィルムをカットしたスリットヤ
ーンやスプリットヤーンでも良い。また太さについても
モノフィラメントであれば単糸デニールが５０から１０
００デニール、パイル糸としては１０００から１０００
０デニール、フィルムのものでは１０００から１０００
０デニールが通常使用されるが、いずれでも、本発明の
目的とするリサイクル性に特に影響を与えるものでな
い。In the present invention, the shape of the pile of artificial grass is not particularly limited. That is, the pile may be a monofilament, or a slit yarn or a split yarn obtained by cutting a film. Regarding the thickness, if it is a monofilament, the denier of single yarn is 50 to 10
00 denier, 1000 to 1000 for pile yarn
0 denier, 1000 to 1000 for film
Although 0 denier is usually used, any of them does not particularly affect the recyclability aimed at by the present invention.
【０００９】人工芝には幾つかの製造方法がある。本発
明の基本思想は人工芝の構成素材を全てナイロン６にす
ることにより、極めて容易にリサイクルするというもの
である。したがって、人工芝がタフティング方法で製造
される場合はその基布がナイロン６からなる紡績糸、あ
るいはフィラメントからなる平織物、あるいはナイロン
６からなる不織布でよい。また、ダブルラッセルやウイ
ルトン織物でパイル織物が製造される場合は地糸にナイ
ロン６からなるフィラメントを用いるものである。There are several manufacturing methods for artificial grass. The basic idea of the present invention is to recycle the artificial grass very easily by using nylon 6 as the constituent material. Therefore, when the artificial grass is manufactured by the tufting method, the base cloth may be a spun yarn made of nylon 6, a plain weave made of filaments, or a non-woven fabric made of nylon 6. Further, when a pile woven fabric is made of a double Russell or Wilton woven fabric, a filament made of nylon 6 is used as the ground yarn.
【００１０】これら人工芝はパイル抜け防止と形態安定
性を付与するため一般に接着剤でバッキングされる。本
発明ではバッキング材もナイロン６のポリマが用いられ
る。パイルに用いるポリマと同様のポリマを用い、メル
トラミネート方法により人工芝の裏側に溶融接着され
る。この溶融接着により、パイルの抜けを防止し、また
ナイロン６のフィルム状の裏打ちにより、形態が安定化
される。These artificial grasses are generally backed with an adhesive in order to prevent the pile from falling out and to provide shape stability. In the present invention, the backing material is also a nylon 6 polymer. The same polymer as that used for the pile is used and melt-bonded to the back side of the artificial turf by the melt lamination method. The fusion bonding prevents the pile from falling out, and the nylon 6 film lining stabilizes the morphology.
【００１１】メルトラミネート方法はナイロン６のチッ
プをエクストルーダーに供給し、２５０℃〜３００℃の
温度で溶融されたポリマーを人工芝の幅分のスリットを
有する口金からシート状に吐出し、冷却固化以前にロー
ルから解じょされ、連続的に供給される人工芝の裏面に
接触積層され、形成されるものである。バッキングに使
用されるナイロン６のポリマーはファイバーに使用され
るような高重合度のものである必要は無く、低重合度
で、融点の低いポリマーが好適である。In the melt laminating method, nylon 6 chips are supplied to an extruder, and a polymer melted at a temperature of 250 ° C. to 300 ° C. is discharged in a sheet form from a die having a slit for the width of artificial turf, and solidified by cooling. It is formed by being contact-laminated on the back surface of the artificial grass that was previously unwound from the roll and continuously supplied. The polymer of nylon 6 used for backing does not need to have a high degree of polymerization as used for fibers, but a polymer having a low degree of polymerization and a low melting point is suitable.
【００１２】上述したようにナイロン６の素材で形成さ
れた人工芝は、耐摩耗性、耐フィブリル化性に優れてい
るので耐久性に優れ、クッション性や美観にも優れるの
で、従来と同様にインテリア用途や、スポーツ用途に好
適に用いられる。As described above, the artificial turf made of the nylon 6 material is excellent in wear resistance and fibrillation resistance, and therefore excellent in durability, and also excellent in cushioning property and aesthetic appearance. Suitable for interior applications and sports applications.
【００１３】本発明では、上述の用途への展開を将来、
敷き換えの場合に老朽化した人工芝を回収し、リサイク
ルすることにより巨大な廃棄物を減少させ、しかも貴重
な資源を有効に活用することを本来の目的とするもので
ある。In the present invention, the development of the above-mentioned applications will be achieved in the future.
The original purpose is to reduce the huge amount of waste by collecting and recycling the deteriorated artificial grass in the case of re-laying, and to effectively utilize valuable resources.
【００１４】そのために、使用済みや生産屑などで回収
された本発明のナイロン６製人工芝は、先ず、簡易な清
掃をされたり、大きな異物が取り除かれるか、または、
かかる政争や線状をすることなく、そのままクラッシャ
ーで粉砕される。粉砕されてチップ化あるいは粉末化さ
れた人工芝は、必要により、水洗される。水洗は人工芝
に付着あるいは混入した砂や土などの高比重の異物を分
離することを目的としている。水洗後、乾燥されて人工
芝はリサイクル原料と見なすことが出来る。該ナイロン
６屑のリサイクル原料は、先ずメルターへ投入される。
メルターでは５ｋｇ／cm2 の加圧を行い、３００℃に加
熱する。溶融されたポリマーは解重合缶に投入される。
解重合缶へはバッチで、メルトポリマーを投入する。そ
の後、解重合缶に燐酸が投入される。次いで加熱蒸気の
吹き込みを開始する。メルトポリマと燐酸は、セミバッ
チで投入が継続される。ナイロン６ポリマは解重合反応
が極めて容易に進行する利点を有する。生成したラクタ
ムは濃縮塔から連続で抜いていく。解重合は連続で継続
されるが、解重合缶の残滓が規定量になった時点で運転
を停止して、釜残、及び残滓を抜き出す。Therefore, the nylon 6 artificial turf of the present invention, which has been collected as used or produced waste, is first subjected to simple cleaning, removal of large foreign matter, or
It is crushed with a crusher as it is without forming a political conflict or line. The artificial grass crushed into chips or powder is washed with water if necessary. Washing with water is intended to separate foreign matter with a high specific gravity such as sand or soil attached to or mixed with artificial turf. After being washed with water and dried, artificial grass can be regarded as a recycled material. The recycled raw material of the nylon 6 scrap is first put into the melter.
The melter applies a pressure of 5 kg / cm 2 and heats it to 300 ° C. The melted polymer is put into a depolymerization can.
The melt polymer is put in batches into the depolymerization can. Then, phosphoric acid is added to the depolymerization can. Then, the blowing of heated steam is started. The melt polymer and phosphoric acid are continuously added in a semi-batch. Nylon 6 polymer has the advantage that the depolymerization reaction proceeds extremely easily. The produced lactam is continuously withdrawn from the concentration tower. Depolymerization is continued continuously, but when the depolymerization can residue reaches the specified amount, the operation is stopped and the kettle residue and residue are extracted.
【００１５】上述のように、人工芝がナイロン６で製造
されている場合、分離する非効率さあるいは技術的に困
難がなくスムーズに効率的に原料まで回収することがで
きる。ε−カプロラクタムに変換された後、再び該ε−
カプロラクタムは通常のナイロン６の重合工程に供給さ
れリサイクルされるものである。As described above, when the artificial grass is made of nylon 6, the raw materials can be smoothly and efficiently recovered without any inefficiency of separation or technical difficulty. After being converted to ε-caprolactam, the ε-
Caprolactam is supplied and recycled in the usual nylon 6 polymerization process.
【００１６】本発明のリサイクル可能な人工芝は、ナイ
ロン６のパイル、基布、バッキング材で構成されている
ため、従来、極めて困難であった複合素材の分離の必要
が無く、単純に粉砕し、必要により洗浄することによ
り、容易にリサイクル原料とすることができる。該原料
はナイロン６の粗原料であるε−カプロラクタムに解重
合され、純度の高いε−カプロラクタムを提供すること
ができる。Since the recyclable artificial grass of the present invention is composed of a nylon 6 pile, a base cloth, and a backing material, it is not necessary to separate the composite material, which has been extremely difficult in the past, and it is simply crushed. It can be easily recycled as a raw material by washing if necessary. The raw material can be depolymerized to ε-caprolactam, which is a crude raw material of nylon 6, to provide ε-caprolactam with high purity.
【００１７】[0017]
【実施例】次に実施例により、本発明をさらに詳しく説
明する。Next, the present invention will be described in more detail by way of examples.
【００１８】実施例１、２、比較例１、２ パイル糸ナイロン６のモノフィラメントの微捲縮糸で単
糸の繊度が５００デニールの糸を用いた。基布は、ナイ
ロン６の３０番手のスパン糸で目付１５０ｇ／ｍ2 の平
織物を用いた。タフティング機により、このナイロン６
の基布にナイロン６のパイル糸を、砂入り人工芝の場合
は、パイル長さ２６ｍｍ、砂無し人工芝はパイル長さ１
３ｍｍとし、パイル目付はいずれも１ｋｇ／ｍ2 として
人工芝を作製した。人工芝の幅は２ｍ、長さは１００ｍ
で１本のロールとした。Examples 1, 2 and Comparative Examples 1, 2 Pile yarn Nylon 6 monofilament fine crimped yarn having a fineness of 500 denier was used. As the base cloth, a plain weave of nylon 6 having a count of 30 and a basis weight of 150 g / m 2 was used. With a tufting machine, this nylon 6
Nylon 6 pile yarn is used as the base fabric for the sand-containing artificial grass with a pile length of 26 mm, and the sandless artificial grass has a pile length of 1
The artificial turf was manufactured with a pile weight of 3 mm and a pile weight of 1 kg / m 2 . Artificial grass has a width of 2 m and a length of 100 m
It was made into one roll.
【００１９】この人工芝をメルトラミネーターの人工芝
供給用クリールに設置し、ラミネーターの吐出口に対向
する部分に供給した。メルトラミネーターにはナイロン
６のポリマチップを供給し、２８０℃に加熱してメルト
し、２ｍの吐出口からシート状に吐出した。吐出された
シートは冷却固化される前に人工芝の裏面に積層接着さ
れた。シートの目付は８００ｇ／ｍ2 とした。透水化の
ためシートには部分的に透水孔となるように該シートの
積層時に吐出量を制御した。すなわち、人工芝の裏面の
パイル植毛畝部は該シートを融着させ、それ以外の部分
は該シート（ポリマ）が存在しないものであった。This artificial turf was placed on the artificial turf supply creel of the melt laminator, and was supplied to the portion facing the discharge port of the laminator. Nylon 6 polymer chips were supplied to the melt laminator, heated to 280 ° C. to melt, and discharged in a sheet form from a discharge port of 2 m. The discharged sheets were laminated and adhered to the back surface of the artificial grass before being cooled and solidified. The basis weight of the sheet was 800 g / m 2 . In order to make the sheets water-permeable, the discharge amount was controlled when the sheets were laminated so that the sheets had water-permeable holes partially. That is, the pile flock ridges on the back surface of the artificial turf were fused with the sheet, and the sheet (polymer) was not present in other portions.
【００２０】比較例として、該人工芝のバッキング材と
して通常の炭酸カルシウムを１００部投入したＳＢＲを
８００ｇ／ｍ2 で塗布した。As a comparative example, SBR containing 100 parts of ordinary calcium carbonate was applied at 800 g / m 2 as a backing material for the artificial grass.
【００２１】これら人工芝を砂入り人工芝（実施例１、
比較例１）はテニスコートに、砂無し人工芝（実施例
２、比較例２）は家庭のベランダに敷設した。半年後に
これら人工芝を剥ぎ取り、リサイクルの実行を試みた。[0021] These artificial grasses are sand-containing artificial grasses (Example 1,
Comparative Example 1) was laid on a tennis court, and sandless artificial grass (Example 2, Comparative Example 2) was laid on a veranda at home. Half a year later, we stripped off these artificial grass and tried to implement recycling.
【００２２】実施例１の人工芝については、砂入り人工
芝は砂の除去を行い、砂無し人工芝（実施例２）は若干
の清掃をした後、クラッシャーに供給し、粉砕した。次
いで、水洗し、付着物の除去を行い、乾燥後にリサイク
ル原料として上述した解重合プロセスに投入した。その
結果、いずれも９８％以上の純度のε−カプロラクタム
が得られた。Regarding the artificial grass of Example 1, the sand containing artificial grass was subjected to sand removal, and the sandless artificial grass (Example 2) was slightly cleaned and then fed to a crusher and crushed. Then, it was washed with water to remove the deposits, dried, and then put into the above-described depolymerization process as a recycled raw material. As a result, ε-caprolactam having a purity of 98% or higher was obtained in each case.
【００２３】次に、比較例１、２の人工芝については、
バッキング材であるＳＢＲの除去を試みたが、分離が困
難で、除去不充分な状態であったが、クラッシャーで粉
砕し、解重合プロセスへ投入したが、回収率が５０％に
も満たない上、反応釜が著しく汚染されて、完全に洗浄
しなければ使用できない状態であった。Next, regarding the artificial grasses of Comparative Examples 1 and 2,
Attempts were made to remove SBR, which is a backing material, but it was difficult to separate and was in an insufficient removal state, but it was crushed with a crusher and put into the depolymerization process, but the recovery rate was less than 50%. The reactor was so contaminated that it could not be used unless it was thoroughly washed.
【００２４】[0024]
【発明の効果】本発明のリサイクル可能な人工芝によれ
ば、全構成部材がナイロン６で構成されているので、構
成部分の分離の必要がなく容易にリサイクル原料として
解重合プロセスに投入出来、しかも純度の高いナイロン
６の粗原料のε−カプロラクタムに変換、リサイクルで
きる効果を発揮する。EFFECTS OF THE INVENTION According to the recyclable artificial grass of the present invention, since all the constituent members are made of nylon 6, it is not necessary to separate the constituent parts and can be easily put into the depolymerization process as a recycled raw material. Moreover, it has the effect of being able to be converted and recycled into ε-caprolactam, which is a crude material of high-purity nylon 6.
Claims (5)
６を素材とするものであることを特徴とするリサイクル
可能な人工芝。1. A recyclable artificial grass characterized in that all the members constituting the artificial grass are made of nylon 6.
よびバッキング材である請求項１記載のリサイクル可能
な人工芝。2. The recyclable artificial turf according to claim 1, wherein the member is a pile, a base cloth, or a ground yarn and a backing material.
ある請求項１記載のリサイクル可能な人工芝。3. The recyclable artificial turf according to claim 1, wherein the backing material is a nylon 6 film.
圧着により固定されている請求項２記載のリサイクル可
能な人工芝。4. The recyclable artificial grass according to claim 2, wherein the backing material is fixed to the back surface of the base cloth by fusion bonding or pressure bonding.
４記載のリサイクル可能な人工芝。5. The recyclable artificial turf according to claim 4, wherein the fusion bonding or pressure bonding is partial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5327696A JPH09242011A (en) | 1996-03-11 | 1996-03-11 | Recyclable artificial lawn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5327696A JPH09242011A (en) | 1996-03-11 | 1996-03-11 | Recyclable artificial lawn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09242011A true JPH09242011A (en) | 1997-09-16 |
Family
ID=12938224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5327696A Pending JPH09242011A (en) | 1996-03-11 | 1996-03-11 | Recyclable artificial lawn |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09242011A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009078128A1 (en) | 2007-12-14 | 2009-06-25 | Sumitomo Rubber Industries, Ltd. | Artificial turf structure, artificial turf facilities employing the artificial turf structure, and system for recycling artificial turf structure |
| WO2009084150A1 (en) | 2007-12-27 | 2009-07-09 | Sumitomo Rubber Industries, Ltd. | Particulate substance for filling artificial turf and artificial turf structure filled with the particulate substance for filling artificial turf |
| EP2119829A2 (en) | 2008-05-13 | 2009-11-18 | Sumitomo Rubber Industries, Ltd. | Artificial grass granulated infill and artificial grass structure using the same |
| EP2119830A2 (en) | 2008-05-13 | 2009-11-18 | Sumtiomo Rubber Industries Ltd | Artificial grass granulated infill and artificial grass structure using the same |
-
1996
- 1996-03-11 JP JP5327696A patent/JPH09242011A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009078128A1 (en) | 2007-12-14 | 2009-06-25 | Sumitomo Rubber Industries, Ltd. | Artificial turf structure, artificial turf facilities employing the artificial turf structure, and system for recycling artificial turf structure |
| WO2009084150A1 (en) | 2007-12-27 | 2009-07-09 | Sumitomo Rubber Industries, Ltd. | Particulate substance for filling artificial turf and artificial turf structure filled with the particulate substance for filling artificial turf |
| EP2119829A2 (en) | 2008-05-13 | 2009-11-18 | Sumitomo Rubber Industries, Ltd. | Artificial grass granulated infill and artificial grass structure using the same |
| EP2119830A2 (en) | 2008-05-13 | 2009-11-18 | Sumtiomo Rubber Industries Ltd | Artificial grass granulated infill and artificial grass structure using the same |
| JP2009275370A (en) * | 2008-05-13 | 2009-11-26 | Sumitomo Rubber Ind Ltd | Particulate matter for filling artificial lawn, and artificial lawn structure filled with the same |
| JP2009275372A (en) * | 2008-05-13 | 2009-11-26 | Sumitomo Rubber Ind Ltd | Particulate matter for filling artificial lawn, and artificial lawn structure filled with the same |
| JP4623750B2 (en) * | 2008-05-13 | 2011-02-02 | 住友ゴム工業株式会社 | Artificial turf structure using an artificial turf filling granule and the artificial turf filling granule |
| JP4623749B2 (en) * | 2008-05-13 | 2011-02-02 | 住友ゴム工業株式会社 | Artificial turf structure using an artificial turf filling granule and the artificial turf filling granule |
| US8147939B2 (en) | 2008-05-13 | 2012-04-03 | Sumitomo Rubber Industries Ltd. | Artificial grass granulated infill and artificial grass structure using the same |
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