JP2003103230A - Material alternative to covering soil - Google Patents
Material alternative to covering soilInfo
- Publication number
- JP2003103230A JP2003103230A JP2001303220A JP2001303220A JP2003103230A JP 2003103230 A JP2003103230 A JP 2003103230A JP 2001303220 A JP2001303220 A JP 2001303220A JP 2001303220 A JP2001303220 A JP 2001303220A JP 2003103230 A JP2003103230 A JP 2003103230A
- Authority
- JP
- Japan
- Prior art keywords
- waste
- woven
- soil
- fabric
- present
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Landscapes
- Processing Of Solid Wastes (AREA)
- Biological Depolymerization Polymers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、廃棄物処分場にお
いて、廃棄物の飛散・流出防止、悪臭の飛散防止、衛生
害虫獣の忌避や繁殖防止のために、廃棄物の上に覆う土
に替えて使用することができる覆土代替材に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil to be covered with waste in a waste disposal site in order to prevent the scattering / outflow of waste, the scattering of bad odor, the repelling of sanitary pests, and the prevention of breeding. The present invention relates to a covering soil substitute material that can be used by replacing it.
【０００２】[0002]
【従来の技術】廃棄物処分場は地表を適度な深さに掘り
下げて形成され、その底から順に廃棄物を埋め立てるよ
うになっている。廃棄物の飛散・流出防止、悪臭の飛散
防止、衛生害虫獣の忌避や繁殖防止のために、日々の作
業終了後、即日覆土として、廃棄物の上を３０〜５０ｃ
ｍ程度の厚みの土で覆っている。2. Description of the Related Art A waste disposal site is formed by digging the surface of the earth down to an appropriate depth, and the waste is filled up in order from the bottom. To prevent the scattering / outflow of waste, the scattering of bad odor, the repelling of sanitary pests and the breeding, after the completion of daily work, as soil covering the same day, 30-50c above the waste.
It is covered with soil with a thickness of about m.
【０００３】しかし、廃棄物処分場において、このよう
な即日覆土が占める割合は、廃棄物処分場の容積の１５
〜２５％となり、その分の廃棄物の埋立て容量が減るこ
ととなり、廃棄物処分場の用地確保が困難となる状況下
において問題となっている。また、覆土が風等により飛
散し、廃棄物の焼却物が飛散しているような疑いが持た
れるという問題がある。また、図１に示す廃棄物処分場
の模式的断面図のように土で覆う廃棄物（２）が全くの
平坦面のみであれば、その上に平坦に土により覆えばよ
いが、短期間の廃棄物の場合は、図２に示す廃棄物処分
場の模式的断面図のように廃棄物（２）には、平坦面と
斜面（法面）を有しており、斜面を土で被覆することは
非常に困難であり、より多量の土を要するという問題が
あった。However, in the waste disposal site, the proportion of such soil covering the same day is 15 times the volume of the waste disposal site.
It is about 25%, and the landfill capacity of the waste is reduced by that amount, which is a problem in the situation where it is difficult to secure the land for the waste disposal site. In addition, there is a problem that the cover soil is scattered by wind and the like, and there is a suspicion that the incinerated waste is scattered. If the waste (2) covered with soil has a completely flat surface as shown in the schematic cross-sectional view of the waste disposal site shown in FIG. 1, it may be covered flatly with the soil, but for a short period of time. In the case of waste, the waste (2) has a flat surface and a slope (slope) as shown in the schematic cross-sectional view of the waste disposal site shown in Fig. 2, and the slope is covered with soil. It was very difficult to do so, and there was a problem that a larger amount of soil was required.
【０００４】このような問題を解決するものとして古紙
スラリーが挙げられる。これは、細かく砕いた古紙をバ
インダーと水で拡散し、生成したスラリーを廃棄物表面
に吹きつけ散布する。吹きつけたスラリーは、乾燥後、
皮膜を形成し、これにより廃棄物を覆うというものであ
る。As a solution to such a problem, there is a waste paper slurry. This involves dispersing finely crushed waste paper with a binder and water and spraying the resulting slurry onto the surface of the waste. The sprayed slurry, after drying,
It forms a film, which covers the waste.
【０００５】また、発泡させた泡状のフォームを、廃棄
物表面に吹きつけ散布するというものも提案されてい
る。It has also been proposed to spray the foamed foam on the surface of the waste.
【０００６】しかし、前者の古紙スラリーは、廃棄物表
面に皮膜を形成するため、廃棄物表面を強固に覆ってい
るものではあるが、所詮、紙であるため強力が弱く、廃
棄物が有する突起等によって、また、古紙スラリーで覆
った廃棄物上を重機が走行した場合に、容易に破れて廃
棄物が露出するという問題がある。[0006] However, the former waste paper slurry forms a film on the surface of the waste, and therefore, it firmly covers the surface of the waste, but after all, since it is paper, it is weak in strength and has a protrusion on the waste. For example, when the heavy machine runs on the waste covered with the waste paper slurry, there is a problem that the waste is easily broken and the waste is exposed.
【０００７】また、古紙スラリーおよびフォームを利用
する場合には、それ専用の高価な散布機を要するという
問題がある。Further, when using the waste paper slurry and foam, there is a problem that an expensive spreader dedicated to the slurry is required.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、上記問題を
解決し、廃棄物処分場の容量をできるだけ確保でき、ま
た、重機によっても容易に破れることなく、廃棄物を良
好に覆うことが可能で、また、コストを抑えることが可
能な、覆土に替わる覆土代替材を提供することを課題と
する。DISCLOSURE OF THE INVENTION The present invention solves the above problems, can secure the capacity of a waste disposal site as much as possible, and can cover waste well without being easily broken by heavy equipment. It is also an object of the present invention to provide a soil covering substitute that can reduce costs and replace soil covering.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、このよう
な事情に鑑み鋭意検討の結果,本発明を完成するに至っ
た。The inventors of the present invention have completed the present invention as a result of intensive studies in view of such circumstances.
【００１０】すなわち、本発明は、廃棄物処分場におい
て使用する覆土代替材であって、不織布または織編物か
らなり、引裂強力が １００Ｎ以上であることを特徴と
する覆土代替材を要旨とするものである。That is, the present invention is a soil covering substitute used in a waste disposal site, which is made of a non-woven fabric or a woven or knitted fabric and has a tear strength of 100 N or more. Is.
【００１１】[0011]
【発明の実施の形態】以下、本発明について詳細に説明
する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
【００１２】本発明の覆土代替材は、不織布または織編
物からなる。The cover soil substitute material of the present invention comprises a non-woven fabric or a woven or knitted fabric.
【００１３】本発明の覆土代替材である不織布または織
編物は、引裂強力が１００Ｎ以上である。引裂強力が１
００Ｎ未満であると、廃棄物に突起があった場合や、ま
た、覆土代替材上に重機が走行した場合に容易に破れ
て、廃棄物が露出してしまい、本発明の目的が達成でき
ないため好ましくない。ここで、不織布または織編物の
引裂強力とは、たて方向およびよこ方向の両方向共に１
００Ｎ以上とする。The nonwoven fabric or woven or knitted material as the soil covering substitute of the present invention has a tear strength of 100 N or more. Tear strength is 1
If it is less than 00N, the waste may have protrusions, or the heavy equipment may easily break when the soil-covering alternative material runs on it, and the waste may be exposed, so that the object of the present invention cannot be achieved. Not preferable. Here, the tear strength of a nonwoven fabric or a woven or knitted fabric is 1 in both the warp direction and the weft direction.
00N or more.
【００１４】本発明に用いる不織布または織編物として
は、上記引裂強力を有するものであれば、その形態・組
織は特に限定されず、通常公知のものを用いることがで
きる。本発明においては、特に、構成繊維同士が交絡す
ることにより一体化してなるニードルパンチ不織布を用
いることが好ましい。ニードルパンチ不織布は、構成繊
維同士がある程度の自由度を有するものであるため、凹
凸のある廃棄物の上を覆った際に、その凹凸面に追随す
ることができ、良好に敷設することが可能であることか
ら、好ましく用いることができる。The non-woven fabric or woven or knitted fabric used in the present invention is not particularly limited in its form and structure as long as it has the above-mentioned tear strength, and a generally known one can be used. In the present invention, it is particularly preferable to use a needle punched non-woven fabric which is integrated by entanglement of constituent fibers. Since the constituent fibers of the needle-punched non-woven fabric have a certain degree of freedom, they can follow the uneven surface when covering the uneven waste and can be laid well. Therefore, it can be preferably used.
【００１５】本発明に用いる不織布または織編物の厚み
は、０．５ｍｍ〜１０ｍｍ程度であることが好ましい。
厚みが０．５ｍｍ未満であると、不織布または織編物の
強力が小さくなる傾向となる。また、不織布または織編
物の繊維間空隙より、廃棄物が露出しやすく、飛散・流
出する傾向となる。一方、１０ｍｍを超えると、本発明
の目的である廃棄物埋立て容量を大幅に増加させるとい
う効果を奏することができない傾向となる。The thickness of the non-woven fabric or woven or knitted fabric used in the present invention is preferably about 0.5 mm to 10 mm.
If the thickness is less than 0.5 mm, the strength of the non-woven fabric or woven or knit tends to be small. Further, the wastes are more likely to be exposed than the inter-fiber voids of the non-woven fabric or the woven or knitted fabric, and the wastes tend to be scattered or flown out. On the other hand, when it exceeds 10 mm, the effect of significantly increasing the waste landfill capacity, which is the object of the present invention, tends to be unachievable.
【００１６】本発明に用いる不織布または織編物の目付
は、その形態・組織にもよるが、５０ｇ／ｍ2以上であ
ることが好ましく、さらに好ましくは１００ｇ／ｍ2以
上である。目付が５０ｇ／ｍ2未満であると、不織布ま
たは織編物の強力が小さくなる傾向となる。また、不織
布または織編物の形態・組織によっては、廃棄物（焼却
灰等）が飛散・流出しやすくなる。一方、目付の上限に
ついては、所望の引裂強力を満足し、かつ厚みとの関係
から、１６００ｇ／ｍ2程度とする。The unit weight of the non-woven fabric or woven or knitted fabric used in the present invention is preferably 50 g / m 2 or more, more preferably 100 g / m 2 or more, although it depends on the form and structure thereof. When the basis weight is less than 50 g / m 2 , the strength of the non-woven fabric or the woven or knitted fabric tends to be small. In addition, depending on the shape and structure of the non-woven fabric or woven or knitted material, wastes (incineration ash, etc.) are likely to be scattered and flown out. On the other hand, the upper limit of the basis weight is about 1600 g / m 2 in order to satisfy the desired tear strength and the relationship with the thickness.
【００１７】不織布または織編物は、従来技術に記載し
たような古紙スラリーと比べて、繊維間の空隙が大きい
ため、透水性・通気性が良好である。したがって、廃棄
物より発生するガスを通過させたり、また、雨水を良好
に透過させることができる。Nonwoven fabrics or woven or knitted fabrics have good water permeability and air permeability because they have larger voids between fibers than the waste paper slurries described in the prior art. Therefore, it is possible to allow the gas generated from the waste to pass therethrough and to allow rainwater to permeate well.
【００１８】不織布を構成する繊維の形態は、長繊維あ
るいは短繊維であってもよい。織編物を構成する繊維の
形態は、マルチフィラメント、モノフィラメント、紡績
糸等いずれのものであってもよい。The fibers forming the nonwoven fabric may be long fibers or short fibers. The form of the fibers constituting the woven or knitted fabric may be any of multifilament, monofilament, spun yarn and the like.
【００１９】また、繊維の素材は、ポリエステル系重合
体、ポリアミド系重合体、ポリオレフィン系重合体、脂
肪族ポリエステル系重合体等の合成重合体からなる合成
繊維、綿、毛、絹等の天然繊維、レーヨン、溶剤紡糸セ
ルロース等の再生繊維等いずれのものを用いることがで
きる。The material of the fiber is synthetic fiber made of synthetic polymer such as polyester polymer, polyamide polymer, polyolefin polymer and aliphatic polyester polymer, natural fiber such as cotton, wool and silk. Any of recycled fibers such as rayon, rayon, and solvent-spun cellulose can be used.
【００２０】また、本発明においては、脂肪族ポリエス
テル系重合体や、天然繊維、再生繊維等の微生物により
分解可能な生分解性を有する繊維を構成繊維として使用
することが、環境の面から好ましく、なかでも、脂肪族
ポリエステル系重合体からなる繊維は、強度等の点から
好ましい。In the present invention, it is preferable from the environmental point of view to use an aliphatic polyester polymer or a fiber having biodegradability which can be decomposed by microorganisms such as natural fiber and regenerated fiber as the constituent fiber. Of these, fibers made of an aliphatic polyester polymer are preferable from the viewpoint of strength and the like.
【００２１】また、廃棄物によっては燃焼する場合があ
り、そのような廃棄物に対しては、難燃性を有する素材
を用いることが好ましい。難燃性を有する素材として
は、例えば、本発明で用いる不織布または織編物に、ハ
ロゲン系やリン化合物等の難燃剤が付与されているもの
が挙げられる。また、ポリ乳酸系繊維からなる不織布ま
たは織編物が挙げられ、これは、生分解性を有するもの
であり、かつ、特別な難燃化処理を施すことを要しない
ため好ましい。ポリ乳酸系繊維からなる不織布または織
編物が、難燃剤を付与するというような特別な難燃化処
理を施さなくとも燃え難い性質を持つ理由は定かではな
いが、ポリ乳酸の化学構造に起因すると考えられる。一
般に、燃えるのはＣ原子であるところから、化学構造に
おいてＣ原子の比率が大きい方がよく燃えると考えられ
ている。ポリ乳酸を構成する原子のＯ原子／Ｃ原子の比
率が高いことから、ポリ乳酸は燃え難いという性質を有
すると推察できる。したがって、ポリ乳酸系重合体から
なる不織布に、特別な難燃剤を付与しなくとも、目的と
する難燃性を具備することが可能となる。Further, some waste materials may burn, and it is preferable to use a material having flame retardancy for such waste materials. Examples of the flame-retardant material include those obtained by adding a flame retardant such as a halogen-based or phosphorus compound to the nonwoven fabric or woven or knitted fabric used in the present invention. Further, a non-woven fabric or a woven or knitted product made of polylactic acid-based fiber can be mentioned, which is preferable because it has biodegradability and does not require any special flame retardant treatment. It is not clear why the non-woven fabric or woven or knitted fabric made of polylactic acid-based fibers has the property of being difficult to burn without applying a special flame-retardant treatment such as imparting a flame-retardant agent, but due to the chemical structure of polylactic acid. Conceivable. Generally, since it is the C atoms that burn, it is considered that the larger the proportion of C atoms in the chemical structure, the better the burning. Since the ratio of O atom / C atom of the atoms constituting polylactic acid is high, it can be inferred that polylactic acid has a property of being difficult to burn. Therefore, it becomes possible to provide the target flame retardancy without adding a special flame retardant to the nonwoven fabric made of the polylactic acid polymer.
【００２２】本発明の覆土代替材の施工方法としては、
埋め立てられた廃棄物を平坦にならし、不織布または織
編物からなる覆土代替材を幅２００〜３００ｃｍ程度の
ロール巻きにしたものを、廃棄物上で転がして敷設する
ことが容易で好ましい。As a construction method of the soil covering substitute material of the present invention,
It is easy and preferable to flatten the landfilled waste and roll a soil covering substitute made of a nonwoven fabric or a woven or knitted fabric with a width of about 200 to 300 cm on the waste to lay it.
【００２３】また、敷設した本発明の覆土代替材は、風
によってずれたり、めくれたりすることを防止するため
に固定することが好ましい。固定方法としては、土のう
を適宜の位置に配置する、釘、ワイヤー、ネット等で固
定する。ここで固定のために用いる土のう、釘、ワイヤ
ー、ネット等は、生分解性を有する素材を用いることが
好ましい。The laid soil covering substitute of the present invention is preferably fixed in order to prevent it from being displaced or turned over by the wind. As a fixing method, a sandbag is placed at an appropriate position and fixed with a nail, a wire, a net or the like. The sandbags, nails, wires, nets, etc. used for fixing here are preferably made of biodegradable materials.
【００２４】[0024]
【実施例】次に、実施例に基づいて、本発明を具体的に
説明する。また、特性は、下記方法によって測定した。
（１）引裂強力（Ｎ）：ＪＩＳ Ｌ １０９６ シング
ルタング法に従って測定した。EXAMPLES Next, the present invention will be specifically described based on examples. The characteristics were measured by the following methods. (1) Tear strength (N): Measured according to JIS L 1096 single tongue method.
【００２５】実施例１
ポリ乳酸系重合体からなり、単糸繊度３デシテックスの
長繊維からなる不織布であって、構成繊維同士がニード
ルパンチ処理により交絡してなるニードルパンチ不織布
（目付２００ｇ／ｍ2、厚み２ｍｍ、幅２１０ｃｍ）を
本発明の覆土代替材として用いた。Example 1 A non-woven fabric made of a polylactic acid-based polymer and made of long fibers having a single yarn fineness of 3 decitex, wherein the constituent fibers are entangled by a needle punching treatment (200 g / m 2 of basis weight). , Thickness 2 mm, width 210 cm) was used as the soil covering substitute of the present invention.
【００２６】図３に示すような廃棄物処分場（１）にお
いて、廃棄物上（２）に、ロール巻きにしている本発明
の覆土代替材（４）を転がして敷設し、固定のために３
０〜５０ｃｍ間隔で土のうを配置した。本発明の覆土代
替材は、廃棄物の凹凸および斜面にも良好に追随するこ
とができ、作業性が容易で、良好に敷設することができ
た。In the waste disposal site (1) as shown in FIG. 3, the soil covering substitute material (4) of the present invention, which is wound into a roll, is laid on the waste material (2) for fixing. Three
Sandbags were placed at intervals of 0 to 50 cm. The soil covering substitute of the present invention was able to follow unevenness and slopes of waste satisfactorily, was easy to work with, and could be laid satisfactorily.
【００２７】本発明の覆土代替材の引裂強力は、たて方
向が１２５Ｎ、よこ方向が１６７Ｎであり、良好に廃棄
物を覆うことができるものであった。The tear strength of the soil cover substitute of the present invention was 125 N in the vertical direction and 167 N in the horizontal direction, and was able to cover wastes satisfactorily.
【００２８】[0028]
【発明の効果】本発明の覆土代替材は、不織布または織
編物からなり、引裂強力が１００Ｎ以上である。したが
って、廃棄物が突起を有する場合や、覆土代替材上を重
機が走行する場合でも、容易に破れることなく、良好に
廃棄物を覆うことが可能である。The covering soil substitute of the present invention is made of a non-woven fabric or a woven or knitted fabric, and has a tear strength of 100 N or more. Therefore, even when the waste has a protrusion or when the heavy machine travels on the soil covering substitute material, the waste can be favorably covered without being easily broken.
【００２９】覆土のように３０〜５０ｃｍもの厚みを要
さずとも、良好に廃棄物を覆うことが可能とし、その目
的（周辺への廃棄物の飛散・流出防止、臭気の飛散防止
等）を達成することができるため、処分場の容量を大幅
に確保して、延命化（覆土と比較して１５〜２０％の延
命化）という大きな効果を奏することができる。It is possible to cover the waste satisfactorily without requiring a thickness of 30 to 50 cm like the cover soil, and to achieve its purpose (prevention of scattering and outflow of waste to the surroundings, prevention of odor scattering, etc.). Since this can be achieved, the capacity of the disposal site can be largely secured, and a great effect of extending the life (extending the life by 15 to 20% compared with the cover soil) can be achieved.
【００３０】また、本発明の覆土代替材を敷設する際
に、廃棄物の凹凸および斜面にも良好に追随することが
でき、作業性が良好で、かつ専用機を要するものでない
ためコストを抑えることができる。Further, when laying the soil cover substitute of the present invention, it is possible to follow unevenness and slopes of waste satisfactorily, workability is good, and a dedicated machine is not required, so cost is suppressed. be able to.
【図１】廃棄物処分場の一例を示す模式的断面図であ
る。FIG. 1 is a schematic cross-sectional view showing an example of a waste disposal site.
【図２】廃棄物処分場の他の例を示す模式的断面図であ
る。FIG. 2 is a schematic cross-sectional view showing another example of a waste disposal site.
【図３】実施例において覆土代替材を用いて実施した廃
棄物処分場の模式的断面図である。FIG. 3 is a schematic cross-sectional view of a waste disposal site implemented by using a soil cover substitute in the example.
１： 廃棄物処分場 ２： 廃棄物 ３： 覆土 ４： 覆土代替材 1: Waste disposal site 2: Waste 3: Covering soil 4: Alternative material for soil cover
Claims (3)
材であって、不織布または織編物からなり、引裂強力が
１００Ｎ以上であることを特徴とする覆土代替材。1. A soil covering substitute used at a waste disposal site, which is made of a non-woven fabric or a woven or knitted fabric and has a tear strength of 100 N or more.
により一体化しているニードルパンチ不織布であること
を特徴とする請求項１記載の覆土代替材。2. The covering soil substitute according to claim 1, wherein the nonwoven fabric is a needle punched nonwoven fabric in which constituent fibers are integrated by being entangled with each other.
生分解性を有する繊維からなることを特徴とする請求項
１または２に記載の覆土代替材。3. A fiber constituting a non-woven fabric or a woven or knitted fabric,
The soil covering substitute according to claim 1 or 2, which is made of a biodegradable fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001303220A JP2003103230A (en) | 2001-09-28 | 2001-09-28 | Material alternative to covering soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001303220A JP2003103230A (en) | 2001-09-28 | 2001-09-28 | Material alternative to covering soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003103230A true JP2003103230A (en) | 2003-04-08 |
Family
ID=19123346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001303220A Pending JP2003103230A (en) | 2001-09-28 | 2001-09-28 | Material alternative to covering soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003103230A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007105688A (en) * | 2005-10-17 | 2007-04-26 | Asahi Kasei Fibers Corp | Material for replacing covering soil |
| JP2008155136A (en) * | 2006-12-25 | 2008-07-10 | Asahi Kasei Chemicals Corp | Sheet for covering waste |
| JP2014018775A (en) * | 2012-07-23 | 2014-02-03 | Asahi Kasei Geotech Co Ltd | Cylindrical sandbag |
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| JPH08238466A (en) * | 1995-03-03 | 1996-09-17 | Du Pont Kk | Nonwoven fabric sheet and method for closing waste disposal plant |
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| JPH11350292A (en) * | 1998-06-03 | 1999-12-21 | Toray Ind Inc | Sheet for civil engineering work |
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| JPH04131171A (en) * | 1990-09-20 | 1992-05-01 | Bridgestone Corp | Refuse treatment |
| JPH08238466A (en) * | 1995-03-03 | 1996-09-17 | Du Pont Kk | Nonwoven fabric sheet and method for closing waste disposal plant |
| JPH09291165A (en) * | 1996-02-29 | 1997-11-11 | Mitsubishi Chem Corp | Biodegradable porous film |
| JPH1085695A (en) * | 1996-09-13 | 1998-04-07 | Asahi Du Pont Furatsushiyusupan Prod Kk | Composite coating material used in waste disposal plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007105688A (en) * | 2005-10-17 | 2007-04-26 | Asahi Kasei Fibers Corp | Material for replacing covering soil |
| JP2008155136A (en) * | 2006-12-25 | 2008-07-10 | Asahi Kasei Chemicals Corp | Sheet for covering waste |
| JP2014018775A (en) * | 2012-07-23 | 2014-02-03 | Asahi Kasei Geotech Co Ltd | Cylindrical sandbag |
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