JPH09248070A - Weed proofing sheet - Google Patents

Weed proofing sheet

Info

Publication number
JPH09248070A
JPH09248070A JP8349802A JP34980296A JPH09248070A JP H09248070 A JPH09248070 A JP H09248070A JP 8349802 A JP8349802 A JP 8349802A JP 34980296 A JP34980296 A JP 34980296A JP H09248070 A JPH09248070 A JP H09248070A
Authority
JP
Japan
Prior art keywords
weed
sheet
resin layer
water
nonwoven fabric
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
Application number
JP8349802A
Other languages
Japanese (ja)
Inventor
Naoki Yamane
直樹 山根
Shinji Yuasa
伸二 湯浅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitika Ltd
Original Assignee
Unitika Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unitika Ltd filed Critical Unitika Ltd
Priority to JP8349802A priority Critical patent/JPH09248070A/en
Publication of JPH09248070A publication Critical patent/JPH09248070A/en
Pending legal-status Critical Current

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  • Nonwoven Fabrics (AREA)
  • Protection Of Plants (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a weed proofing sheet effective for agriculture and civil fields by which the strength of crack is higher than a prescribed value, the growth of weed is prevented without generating any puddle and wearing resistance is improved by laminating a water permeable resin layer onto the surface of specified long fiber non-woven fabric. SOLUTION: The water permeable resin layer having fine porous structure, for which a hole diameter is 0.01-100 microns, is laminated on one side of long fiber non-woven fabric (its bulk density is preferably not less than 0.05g/cc) such as polyethylene terephthalate having three-dimensional crossing structure due to needle punch processing, and the strength of crack is higher than 0.2kg. In this case, the punch density is preferably 50-150pieces/cm<2> .

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、農業分野や土木分
野にて雑草等の繁殖を抑えるために用いられる防草シー
トに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weed control sheet used for suppressing the growth of weeds in the fields of agriculture and civil engineering.

【0002】[0002]

【従来の技術】従来より、様々な除草、防草手段を用い
て、建物、構造物等のまわりの美観を維持している。
2. Description of the Related Art A variety of weeding and weeding means have been used to maintain the beauty of buildings and structures.

【0003】除草手段としては、除草剤の散布が行われ
ているが、一時的な効力であること、また、除草剤が一
般に有毒であることから、周囲への公害問題が発生する
問題があった。
[0003] Herbicides are sprayed with herbicides, but there is a problem that the herbicides are temporarily toxic, and the herbicides are generally toxic, which causes pollution to the surroundings. Was.

【0004】また、防草手段として、砂利等の敷設、ビ
ニールシートやゴム引きの織物シート等の遮光性の高い
シートを敷設する方法が行われている。しかし、砂利等
を敷設する方法においては、砂利では均一な遮光をする
ためには厚く敷設する必要があり、また、砂利の隙間か
ら雑草の種子が侵入し、その隙間より雑草が成長すると
いう問題があった。ビニールシートやゴム引きの織物シ
ートにおいては、砂利の場合のような問題点はないが、
シートに透水性がなく遮水性であるために降雨等による
水がシート表面に溜まるという問題があった。
Further, as a means for weed control, a method of laying gravel or the like, or laying a sheet having a high light-shielding property such as a vinyl sheet or a rubber-coated fabric sheet has been used. However, in the method of laying gravel, etc., it is necessary to lay the gravel thickly in order to provide uniform light shielding, and the problem that weed seeds enter through gaps in the gravel and grow through the gaps. was there. For vinyl sheets and rubberized fabric sheets, there is no problem as in the case of gravel,
There is a problem that water due to rainfall or the like accumulates on the sheet surface because the sheet has no water permeability and is water-blocking.

【0005】[0005]

【発明が解決しようとする課題】本発明は、防草効果を
有し、かつ上記問題点を解決するものであって、遮光効
果があり、雑草の種子が侵入することがなく、かつ降雨
等による水がシート表面に溜まることのない透水性を有
した防草シートを提供するものである。
DISCLOSURE OF THE INVENTION The present invention has a weed-preventing effect and solves the above-mentioned problems. It has a light-shielding effect, the seeds of weeds do not invade, and rainfall etc. The present invention provides a weed-preventing sheet having water permeability in which water does not collect on the sheet surface.

【0006】[0006]

【課題を解決するための手段】本発明は、前述した目的
を達成するものであって、ニードルパンチ処理による三
次元交絡構造を有する長繊維不織布の片面に透水性樹脂
層が積層されてなり、かつ引裂強力が0.2kg以上で
あることを特徴とする防草シートを要旨とするものであ
る。
Means for Solving the Problems The present invention is to achieve the above-mentioned object, wherein a water-permeable resin layer is laminated on one surface of a long-fiber nonwoven fabric having a three-dimensional entangled structure by needle punching, In addition, the gist is a weed-proof sheet having a tear strength of 0.2 kg or more.

【0007】[0007]

【発明の実施の形態】以下、本発明の実施の形態につい
て説明する。本発明において用いられる長繊維不織布
は、不織布を構成する繊維が連続フィラメントで構成さ
れているため、短繊維不織布に比べ、強度が強いため、
本発明の目的を達成するために効果的である。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The long-fiber nonwoven fabric used in the present invention has a higher strength than the short-fiber nonwoven fabric because the fibers constituting the nonwoven fabric are composed of continuous filaments.
It is effective to achieve the object of the present invention.

【0008】本発明は、長繊維不織布の片面に透水性樹
脂層が積層されてなる防草シートである。透水性樹脂層
を設けることにより、防草シートの耐摩耗性が向上させ
ることが可能となり、長期的に遮光性を維持することが
できるため、不織布の下の雑草が成長することはなく、
例え成長したとしても防草シートを突き破ることのない
ものが得られる。
The present invention is a grass-proof sheet comprising a long-fiber nonwoven fabric and a water-permeable resin layer laminated on one surface thereof. By providing a water-permeable resin layer, it is possible to improve the wear resistance of the grass sheet, because it is possible to maintain the light-shielding property for a long period of time, weeds under the nonwoven does not grow,
Even if it grows, it does not break through the grass sheet.

【0009】本発明に用いる透水性樹脂層としては、例
えば、多孔質フィルムや孔空きフィルムを不織布に貼り
合わせたり、発砲させた樹脂液を不織布に塗布、乾燥さ
せて泡加工樹脂層を設けることにより得られる。具体的
には、アクリル系樹脂、ウレタン系樹脂、ゴム系ラテッ
クス樹脂等の水系エマルジョン樹脂100重量部と整泡
剤1〜30重量部を配合して混合樹脂液を作成し、次い
で空気を吹き込みながら前記樹脂液を攪拌発泡させ、こ
の発泡樹脂液を不織布の片面に塗布して乾燥させること
により微多孔構造の泡加工樹脂層を設ける。この時の塗
布量としては、乾燥後の固形分重量にて10g/m2
上であることが好ましい。10g/m2未満であると、
不織布表面全体を覆うに足りない傾向にあり、防草シー
トの耐摩耗性、遮光性に劣る傾向にある。透水性樹脂層
の目付は、不織布の目付や防草シートの耐摩耗性、遮光
性等の性能を考慮して適宜選択すればよい。
As the water-permeable resin layer used in the present invention, for example, a porous film or a perforated film is attached to a non-woven fabric, or a foamed resin liquid is applied to the non-woven fabric and dried to provide a foam-processed resin layer. Is obtained by Specifically, 100 parts by weight of an aqueous emulsion resin such as an acrylic resin, a urethane-based resin, or a rubber-based latex resin and 1 to 30 parts by weight of a foam stabilizer are blended to prepare a mixed resin liquid, and then while blowing air, The resin liquid is stirred and foamed, and the foamed resin liquid is applied to one side of the nonwoven fabric and dried to provide a foamed resin layer having a microporous structure. The coating amount at this time is preferably 10 g / m 2 or more in terms of solid content after drying. When it is less than 10 g / m 2 ,
It tends to be insufficient to cover the entire surface of the non-woven fabric, and tends to be inferior in abrasion resistance and light-shielding property of the grass-proof sheet. The basis weight of the water-permeable resin layer may be appropriately selected in consideration of the basis weight of the non-woven fabric, the abrasion resistance of the weed-preventing sheet, the light-shielding properties, and the like.

【0010】塗布された樹脂液は、不織布の片面から不
織布厚さの1/3程度の浸透とすることが望ましい。そ
うすることにより、不織布と透水性樹脂層とが良好に接
合され耐剥離性が向上するため好ましい。
It is desirable that the applied resin liquid permeate from one side of the nonwoven fabric to about 1/3 of the thickness of the nonwoven fabric. This is preferable because the nonwoven fabric and the water-permeable resin layer are satisfactorily bonded to each other and the peel resistance is improved.

【0011】また、酢酸ビニール系、ポリエチレン系、
ポリプロピレン系等の合成樹脂の粒子を不織布表面に分
散し、該合成樹脂を熱により溶かすと同時に不織布表面
に固着し、通気性をもたせるパウダー加工法、微多孔構
造をもつ無機物質の粒状のものを熱可塑性または熱硬化
性もしくはこれらの混合物に混ぜ合わせて不織布の表面
に均一に塗布する方法、水溶性または溶剤性の物質を熱
可塑性または熱硬化性もしくはこれらの混合物に合わせ
て不織布に均一に塗布した後、水溶性または溶剤性物質
を取り除く方法にて合成樹脂層を微多孔構造とし透水性
能をもたせた透水性樹脂層を設ける方法が挙げられる。
この時の塗布量もまた、乾燥後の固形分重量に対して1
0g/m2 以上であることが好ましい。10g/m2
満であると、不織布表面全体を覆うに足りない傾向にあ
り、防草シートの耐摩耗性、遮光性に劣る傾向にある。
Further, vinyl acetate type, polyethylene type,
Particles of synthetic resin such as polypropylene are dispersed on the surface of the non-woven fabric, and the synthetic resin is melted by heat and fixed to the surface of the non-woven fabric at the same time. A method of uniformly applying to the surface of a non-woven fabric by mixing with a thermoplastic or thermosetting or a mixture thereof, and uniformly applying a water-soluble or solvent-based substance to a non-woven fabric according to a thermoplastic or thermosetting or a mixture thereof. After that, there is a method of providing a water-permeable resin layer having a microporous structure in the synthetic resin layer by a method of removing a water-soluble or solvent-based substance and having water-permeability.
The coating amount at this time is also 1% based on the solid content weight after drying.
It is preferably 0 g / m 2 or more. If the amount is less than 10 g / m 2, it tends to be insufficient to cover the entire surface of the non-woven fabric, and the grass-proof sheet tends to have poor abrasion resistance and light-shielding properties.

【0012】本発明で用いられる透水性樹脂層には、無
数の微細孔が層の表面及び内部に散在するごとく分布
し、かつ少なくとも一部が連続的、断続的に相互に連通
している微多孔構造であることが好ましい。すなわち、
ここでいう微多孔構造とは、一部の微細孔同士が細孔で
連なり、全体として層表面と層内部にある微細孔が連な
っている状態であり、通気性または吸水性を有するもの
である。また、吸水性を向上させるために、透水性樹脂
層に親水剤を付与してもよい。
In the water-permeable resin layer used in the present invention, innumerable fine pores are distributed so as to be scattered on the surface and inside of the layer, and at least some of them are continuously or intermittently communicated with each other. It is preferably a porous structure. That is,
The microporous structure referred to here is a state in which some of the micropores are connected by pores, and the micropores in the layer surface and the inside of the layer are connected as a whole and have air permeability or water absorption. . Further, in order to improve water absorption, a hydrophilic agent may be added to the water permeable resin layer.

【0013】無数の微細孔を有する微多孔構造からなる
透水性樹脂層の微細孔の孔径は、0.01〜100ミク
ロンであることが好ましい。微細孔の孔径が、0.01
ミクロン未満であると、樹脂層の透水性が低下する傾向
にあるため、降雨などによる水が地中に速やかに入りに
くく、表面に水たまりが生じるので好ましくなく、一
方、100ミクロンを超えると降雨などによる水分が微
細孔同士の隙間に保水されやすく、防草シート内部にお
いて、藻類等が発生しやすくなるため好ましくない。
The micropores of the water-permeable resin layer having a microporous structure having innumerable micropores preferably have a pore diameter of 0.01 to 100 μm. The pore size of the micropores is 0.01
If it is less than micron, the water permeability of the resin layer tends to decrease, so it is difficult for water due to rainfall to quickly enter the ground and puddles occur on the surface, which is not preferable. Water is easily retained in the gaps between the micropores, and algae and the like are easily generated inside the grass sheet, which is not preferable.

【0014】本発明で用いる不織布の構成繊維として
は、熱可塑性合成長繊維を用いればよく、例えば、ポリ
エチレンテレフタレート、ポリブチレンテレフタレート
等のポリエステル系重合体、あるいは前記重合体にフタ
ル酸、イソフタル酸、グルタール酸、アジピン酸等の酸
成分やジエチレングリコール、プロピレングリコール、
2,2−ビス(4−ヒドロキシエトキシフェニル)プロ
パン、ビスフェノールA、1,4ブタンジオール等のジ
オール成分などが共重合された共重合ポリエステルでも
よく、ポリエチレン、ポリプロピレンなどのポリオレフ
イン系重合体、ナイロン6、ナイロン66などのポリア
ミド系重合体、ビニロンに代表されるポリビニルアルコ
ール系重合体などが使用され、これらの重合体単独から
なる繊維、あるいは2種以上の相異なる重合体を組み合
わせた貼り合わせ型複合繊維、芯鞘型複合繊維のいずれ
のものでも使用できる。
As the constituent fibers of the non-woven fabric used in the present invention, thermoplastic synthetic filaments may be used. For example, polyester type polymers such as polyethylene terephthalate and polybutylene terephthalate, or phthalic acid, isophthalic acid, Acid components such as glutaric acid and adipic acid, diethylene glycol, propylene glycol,
It may be a copolyester obtained by copolymerizing a diol component such as 2,2-bis (4-hydroxyethoxyphenyl) propane, bisphenol A, and 1,4 butanediol, and a polyolefin polymer such as polyethylene and polypropylene, nylon 6 Polyamide polymers such as nylon, nylon 66, polyvinyl alcohol polymers represented by vinylon, etc. are used, and fibers made of these polymers alone or a laminated composite in which two or more different polymers are combined. Any of fibers and core-sheath type composite fibers can be used.

【0015】本発明で用いる不織布の構成繊維の単糸繊
度は、2〜10デニールが好ましく、より好ましくは3
〜7デニールである。2デニールより小さいとニードル
パンチ処理を施したとき繊維が切れやすくなり、得られ
た不織布の引裂強力や引張強力等の機械的特性が低下す
るので好ましくない。また、10デニールより大きいと
繊維同士の絡合が十分に形成されず、得られた不織布の
引裂強力等の機械的特性が低下するので好ましくない。
The single yarn fineness of the constituent fibers of the nonwoven fabric used in the present invention is preferably 2 to 10 denier, more preferably 3
~ 7 denier. If the denier is less than 2 denier, the fibers are apt to be cut when subjected to the needle punching treatment, and the mechanical properties such as tear strength and tensile strength of the obtained nonwoven fabric are undesirably reduced. On the other hand, if the denier is larger than 10 denier, the entanglement of the fibers is not sufficiently formed, and the mechanical properties such as the tear strength of the obtained nonwoven fabric are undesirably reduced.

【0016】本発明で用いる三次元交絡構造を有する熱
可塑性合成長繊維不織布は、いわゆるスパンボンド法に
よってウェブを形成し、得られたウェブにニードルパン
チ処理を施すか、または一旦ウェブを巻き取った後でニ
ードルパンチ処理を施すことで厚み方向においても構成
繊維同士の絡合により形態保持した不織布を形成する。
The thermoplastic synthetic long-fiber nonwoven fabric having a three-dimensional entangled structure used in the present invention is formed into a web by a so-called spunbond method, and the obtained web is subjected to needle punching treatment or once wound. A needle punching process is performed later to form a non-woven fabric in which the constituent fibers are entangled with each other even in the thickness direction.

【0017】ニードルパンチ処理の条件は特に限定され
ないが、パンチ密度を50〜150個/cm2 とするの
が不織布の機械的特性、繊維同士の絡合性の向上の面か
ら好ましい。パンチ密度が50個/cm2 未満では、構
成繊維同士の絡合が不十分で、不織布の引裂強力等の機
械的特性が向上せず非常に弱く、しかも毛羽のある不織
布となる。また、パンチ密度が150個/cm2 を超え
ると、繊維は十分絡合するものの、繊維が部分的に切断
されるために不織布の引裂強力等の機械的特性が劣る不
織布となり、本発明の目的を達することができなくなる
ので好ましくない。
The conditions for the needle punching treatment are not particularly limited, but a punch density of 50 to 150 pieces / cm 2 is preferable from the viewpoint of improving the mechanical properties of the nonwoven fabric and the entanglement of the fibers. When the punch density is less than 50 pieces / cm 2 , the entanglement of the constituent fibers is insufficient, and the nonwoven fabric has a very weak and fuzzy nonwoven fabric without improving mechanical properties such as tear strength. When the punch density exceeds 150 pieces / cm 2 , although the fibers are sufficiently entangled, the fibers are partially cut, resulting in a nonwoven fabric having poor mechanical properties such as tear strength of the nonwoven fabric. Cannot be reached, which is not preferable.

【0018】本発明に用いる不織布の目付けは、30g
/m2 以上であればよい。好ましくは、50g/m2
上である。不織布の目付けが30g/m2 未満であると
不織布を構成する繊維本数が少ないため、遮光性の劣る
ものとなる。また防草シートとしての機械的強力が低下
するので、歩行に耐えるもの得られず、また、不織布の
下の雑草が成長して防草シートを突き破る可能性が生
じ、防草シートとしての役目を果たせなくなるので好ま
しくない。
The basis weight of the nonwoven fabric used in the present invention is 30 g.
/ M 2 or more. Preferably, it is 50 g / m 2 or more. When the basis weight of the non-woven fabric is less than 30 g / m 2 , the number of fibers constituting the non-woven fabric is small, resulting in poor light-shielding property. In addition, since the mechanical strength of the weed-proof sheet is reduced, it is not possible to obtain what can withstand walking, and the weeds under the non-woven fabric may grow and break through the weed-proof sheet. It is not preferable because it cannot be achieved.

【0019】不織布の目付けは、防草シートとして用い
る場所、環境条件、シートを施工する際の施工手段等に
応じて適宜選択すればよい。例えば、一般家庭用等で用
いる場合の不織布の目付けは、30〜300g/m2
度であればよい。土木分野等で用いる場合の不織布の目
付けは、100g/m2 以上あればよく、好ましくは4
00〜800g/m2 である。一般的に、目付けが大き
い程、遮光率、耐磨耗性、耐久性、耐侯性等が向上し、
シートを長期施工することが可能となる。
The basis weight of the non-woven fabric may be appropriately selected according to the place to be used as the weed-preventing sheet, environmental conditions, construction means for constructing the sheet, and the like. For example, the basis weight of the nonwoven fabric when used for general household use may be about 30 to 300 g / m 2 . When used in the field of civil engineering, the basis weight of the nonwoven fabric may be 100 g / m 2 or more, preferably 4
It is from 00 to 800 g / m 2 . Generally, the larger the basis weight, the higher the light blocking rate, abrasion resistance, durability, weather resistance, etc.
The sheet can be installed for a long period of time.

【0020】本発明に用いる不織布の構成繊維間の接合
をより強固にするために、アクリル樹脂等の接着剤を付
与し、不織布の機械的強力を向上させ、防草シートとし
ての機械的強力を向上させてもよい。
In order to strengthen the bond between the constituent fibers of the non-woven fabric used in the present invention, an adhesive such as an acrylic resin is added to improve the mechanical strength of the non-woven fabric and to improve the mechanical strength of the weed-preventing sheet. You may improve.

【0021】本発明においては、嵩密度0.05g/c
c以上の不織布を用いることが好ましい。嵩密度0.0
5g/cc未満であると、不織布を構成する繊維同士の
隙間が大きくなるため、降雨などによる水分が繊維間隙
に保水されやすく、不織布内部において、藻類等が発生
しやすくなるため好ましくない。
In the present invention, the bulk density is 0.05 g / c.
It is preferable to use a nonwoven fabric of c or more. Bulk density 0.0
If it is less than 5 g / cc, the gap between the fibers constituting the non-woven fabric becomes large, so that moisture due to rainfall is likely to be retained in the inter-fiber gap, and algae and the like are likely to occur inside the non-woven fabric, which is not preferable.

【0022】本発明の防草シートにおいて、前記したニ
ードルパンチ処理による三次元交絡構造を有する長繊維
不織布を用いるので、本発明の目的とする引裂強力が
0.2kg以上の防草シートが得られる。本発明の防草
シートの引裂強力は、0.2kg以上であることが必要
があり、引裂強力が0.2kg未満では、防草シートを
路床に使用した際の耐摩耗性が十分といえず、人の歩行
のよる力に耐えられずシートが裂けてそこから不織布の
下の雑草が成長してくる可能性があり好ましくない。防
草シートの引裂強力は、用いる場所、環境条件、シート
を施工する際の施工手段等に応じて適宜選択すればよ
い。例えば、一般家庭用等で用いる場合は、0.2kg
以上あればよい。土木分野等で用いる場合は、1kg以
上、好ましくは5kg以上である。一般的に、防草シー
トの引裂強力が大きい程、耐磨耗性、耐久性等が向上
し、防草シートを長期施工することが可能となる。
In the weed-preventing sheet of the present invention, since the long-fiber nonwoven fabric having a three-dimensional entangled structure obtained by the above needle punching treatment is used, a weed-preventing sheet having a tear strength of 0.2 kg or more, which is the object of the present invention, can be obtained. . The tear strength of the weed-preventing sheet of the present invention needs to be 0.2 kg or more, and if the tear strength is less than 0.2 kg, it can be said that the abrasion resistance when the weed-preventing sheet is used for a roadbed is sufficient. However, there is a possibility that the sheet cannot be withstood by the force of walking and the sheet is torn, and the weeds under the nonwoven fabric may grow from there, which is not preferable. The tear strength of the weed prevention sheet may be appropriately selected according to the place to be used, environmental conditions, construction means for constructing the sheet, and the like. For example, when used for general household use, 0.2 kg
I just need more. When used in the field of civil engineering, etc., the weight is 1 kg or more, preferably 5 kg or more. In general, the greater the tear strength of the grass sheet, the better the abrasion resistance and durability, and the longer the grass sheet can be constructed.

【0023】本発明の防草シートにおいて、不織布およ
び透水性樹脂層の少なくともいずれか一方に耐候剤を含
有させて、防草シートの耐候性を向上させることが好ま
しい。含有させる耐候剤としては、無機系のものとして
酸化チタン、二酸化チタンが挙げられ、有機系のものと
してベンゾトリアゾール系紫外線吸収剤、ベンゾフェノ
ン系紫外線吸収剤が挙げられる。これらの耐候剤を不織
布に含有させる方法としては、ウェブの材料となる重合
体に耐候剤を混ぜ合わせておけばよい。一方、前記耐候
剤を透水性樹脂層に含有させる方法としては、透水性樹
脂層の材料となる樹脂液に混入させればよい。また、耐
候剤入りバインダーをコーティングやディッピング等に
より付与してもよい。
In the weed-preventing sheet of the present invention, it is preferable that at least one of the non-woven fabric and the water-permeable resin layer contains a weather-resistant agent to improve the weather resistance of the weed-preventing sheet. Examples of the weather resistance agent to be contained include titanium oxide and titanium dioxide as inorganic ones, and benzotriazole ultraviolet absorbers and benzophenone ultraviolet absorbers as organic ones. As a method for incorporating these weathering agents into the nonwoven fabric, a weathering agent may be mixed with a polymer as a material of the web. On the other hand, as a method of including the weathering agent in the water-permeable resin layer, the weather-resistant agent may be mixed into a resin liquid as a material of the water-permeable resin layer. Further, a binder containing a weatherproofing agent may be applied by coating, dipping or the like.

【0024】本発明の防草シートにおいて、不織布およ
び透水性樹脂層の少なくともいずれか一方に着色剤を含
有させてもよい。着色剤を含有させることにより、遮光
性を向上させて雑草等の育成を妨げ、また周りの環境と
調和した美観に優れたものとなる。防草シートの色調
は、遮光性を向上させるために、濃色系または黒色系が
好ましく、また周りの環境と調和した美観に優れたもの
とするために、緑や茶色系等を使用することもできる。
含有させる着色剤としては、黒色としてカーボンブラッ
ク、銀灰色としてアルミニウム粉、雲母粉等が、茶系と
して酸化鉄等が、挙げられる。
In the weed-preventing sheet of the present invention, at least one of the nonwoven fabric and the water-permeable resin layer may contain a coloring agent. By including a coloring agent, the light-shielding property is improved, the growth of weeds and the like is prevented, and the aesthetic appearance in harmony with the surrounding environment is improved. The color of the grass sheet is preferably dark or black to improve the light-shielding property, and use green or brown to improve the aesthetics in harmony with the surrounding environment. Can also.
Examples of the coloring agent include carbon black as black, aluminum powder and mica powder as silver gray, and iron oxide as brown.

【0025】これらの着色剤を不織布に含有させる方法
としては、ウェブの材料となる重合体に着色剤を混ぜ合
わせておけばよい。また、前記着色剤を透水性樹脂層に
含有させる方法としては、透水性樹脂層の材料となる樹
脂液に混入させればよい。
As a method for incorporating these colorants into the non-woven fabric, the colorants may be mixed with the polymer used as the material of the web. As a method of incorporating the colorant into the water-permeable resin layer, it may be mixed in a resin liquid which is a material of the water-permeable resin layer.

【0026】本発明の防草シートは、防草シート下の雑
草の成長を妨げるために、遮光率が95%以上であるこ
とが好ましく、さらに好ましくは99%以上である。遮
光率が95%未満であると、防草シート下の雑草の成長
を妨げるための遮光性が十分でなく、雑草が成長する可
能性があり、防草性が十分な防草シートが得られず好ま
しくない。
The weed-preventing sheet of the present invention preferably has a light-shielding rate of 95% or more, more preferably 99% or more, in order to prevent the growth of weeds under the weed-preventing sheet. When the light-shielding rate is less than 95%, the light-shielding property for preventing the growth of weeds under the weed-proof sheet is not sufficient, and the weeds may grow, so that a herbicidal sheet with sufficient herbicidal properties is obtained. Not preferred.

【0027】[0027]

【実施例】次に、実施例に基づき本発明を具体的に説明
するが、本発明は、これらの実施例によって何ら限定さ
れるものではない。なお、実施例において、各特性値の
測定を次の方法により実施した。 (1)目付(g/m2 ):標準状態の試料から縦10c
m×横10cm試料片計10点を作成し、平衡水分に到
らしめた後、各試料片の重量(g)を秤量し、得られた
値の平均値を単位面積(m2 )当たりに換算し目付(g
/m2 )とした。
Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. In the examples, each characteristic value was measured by the following method. (1) Basis weight (g / m 2 ): 10 c vertically from the sample in the standard state
A total of 10 mx 10 cm sample pieces were prepared, and after reaching equilibrium moisture, the weight (g) of each sample piece was weighed, and the average of the obtained values was determined per unit area (m 2 ). Conversion weight (g
/ M 2 ).

【0028】(2)嵩密度(g/cc):試料の目付
(g/m2 )と厚み(mm)を測定し下記式により嵩密
度(g/cc)を求めた。
(2) Bulk density (g / cc): The basis weight (g / m 2 ) and thickness (mm) of the sample were measured and the bulk density (g / cc) was determined by the following formula.

【0029】 嵩密度(g/cc)=目付/(厚み×1000) (3)引裂強力(kg):JIS L−1096のシン
グルタング法に基づき試料片計10個を作成し、測定し
た。
Bulk density (g / cc) = basis weight / (thickness x 1000) (3) Tear strength (kg): 10 pieces of sample pieces were prepared and measured based on the single tongue method of JIS L-1096.

【0030】(4)引張強力(kg/5cm幅)及び引
張伸度(%):JIS−L−1096に記載のグラブ法
に準じて測定した。
(4) Tensile strength (kg / 5 cm width) and tensile elongation (%): Measured according to the grab method described in JIS-L-1096.

【0031】(5)通気度(cc/cm2 /sec):
JIS−L−1096に記載のフラジール法に準じて測
定した。
(5) Air permeability (cc / cm 2 / sec):
It was measured according to the Frazier method described in JIS-L-1096.

【0032】(6)毛羽立ち性(級):JIS L−1
096に記載のテーパ形法に準じて測定した。
(6) Fluffing property (grade): JIS L-1
The measurement was carried out according to the taper method described in No. 096.

【0033】(7)遮光率(%):JIS L−105
5 A法により測定した。
(7) Light-shielding rate (%): JIS L-105
It was measured by the 5A method.

【0034】実施例1 ポリエチレンテレフタレート重合体の長繊維からなるス
パンボンド不織布を作成した。すなわち、前記重合体チ
ップをエクストルーダ型溶融押出し機を用いて溶融し、
紡糸口金を通して溶融紡出し、紡出糸条を冷却した後、
紡出口金の下方に配設されたエアーサッカを用いて牽引
・細化した後、コロナ放電装置を用いて開繊しスクリー
ンメッシュ式移動捕集面上に捕集・堆積させ、単糸繊度
が4デニールで目付が120g/m2 の長繊維ウェブを
得た。得られたウェブにパンチ密度90個/cm2 の条
件でニードルパンチ処理を施し、厚さが1.0mm、嵩
密度0.12g/ccの長繊維不織布を得た。
Example 1 A spunbonded nonwoven fabric made of long fibers of polyethylene terephthalate polymer was prepared. That is, the polymer chips are melted using an extruder-type melt extruder,
After melt spinning through the spinneret and cooling the spun yarn,
After pulling and thinning using an air sucker arranged below the spinneret, the fiber is opened using a corona discharge device and collected and deposited on a screen mesh type moving collecting surface, and the single yarn fineness is reduced. A 4-denier long fiber web having a basis weight of 120 g / m 2 was obtained. The obtained web was subjected to a needle punching treatment at a punch density of 90 pieces / cm 2 to obtain a long-fiber nonwoven fabric having a thickness of 1.0 mm and a bulk density of 0.12 g / cc.

【0035】次いで、不織布の片面に、着色剤としてカ
ーボンブラックを含有したアクリル樹脂を主成分とする
混合樹脂液をナイフコータにより塗布した。混合樹脂液
のアクリル樹脂100重量部に対するカーボンブラッ
ク、整泡剤の量は次の通りである。 アクリル樹脂(大日本インキ化学工業(株)製ボンコート350 ) 100 重量部 カーボンブラック 5 重量部 整泡剤(大日本インキ化学工業(株)製ボンコートF−1) 10 重量部 上記成分からなる混合樹脂液は塗布前に予め空気を吹き
込みながら攪拌発泡させ、この発泡樹脂液を長繊維不織
布上に塗布して乾燥させることにより、長繊維不織布上
に無数の微細孔を有する微多孔構造の透水性樹脂層を設
け、本発明の防草シートを得た。なお、混合樹脂液の塗
布量は、乾燥後の固形分重量にて100g/m2 とし
た。
Then, a mixed resin liquid containing an acrylic resin containing carbon black as a colorant as a main component was applied to one surface of the non-woven fabric with a knife coater. The amounts of carbon black and foam stabilizer with respect to 100 parts by weight of the acrylic resin in the mixed resin liquid are as follows. Acrylic resin (Boncoat 350 manufactured by Dainippon Ink and Chemicals, Inc.) 100 parts by weight Carbon black 5 parts by weight Foam stabilizer (Boncoat F-1 manufactured by Dainippon Ink and Chemicals, Inc.) 10 parts by weight Mixed resin composed of the above components Before application, the liquid is agitated and foamed while blowing air in advance, and this foamed resin liquid is applied on a long-fiber nonwoven fabric and dried, resulting in a water-permeable resin with a microporous structure having innumerable fine pores on the long-fiber nonwoven fabric. Layers were provided to obtain a grass control sheet of the present invention. The applied amount of the mixed resin liquid was 100 g / m 2 in terms of the solid content after drying.

【0036】実施例2 実施例1において、長繊維ウェブとして目付け400g
/m2 のものを用い、パンチ密度90個/cm2 の条件
でニードルパンチ処理を施し、厚さ4.0mm、嵩密度
0.1g/ccの長繊維不織布を用いた以外は、実施例
1と同様にして本発明の防草シートを得た。
Example 2 In Example 1, a long fiber web having a basis weight of 400 g
/ M using a two ones, subjected to a needle punching treatment at a punching density of 90 / cm 2, except for using the thickness 4.0 mm, long-fiber nonwoven fabric having a bulk density of 0.1 g / cc, the Example 1 A grass control sheet of the present invention was obtained in the same manner as in.

【0037】得られた本発明の防草シートの特性値を表
1に示した。
Table 1 shows the characteristic values of the obtained grass control sheet of the present invention.

【0038】[0038]

【表1】 [Table 1]

【0039】得られた実施例1、2の本発明の防草シー
トは、路床に使用した際に、防草シートの上からの歩行
に十分に耐え、毛羽立ちのない耐摩耗性に優れたもの
で、遮光性が十分で優れた防草性を有し、また、防草シ
ートの下の雑草が成長して突き破ることがない十分な機
械的強力を有するものであった。
The obtained weed-preventing sheets of Examples 1 and 2 of the present invention, when used on a roadbed, were sufficiently resistant to walking from above the weed-preventing sheet and were excellent in abrasion resistance without fuzzing. However, it had sufficient light-shielding properties and excellent weed control properties, and also had sufficient mechanical strength to prevent weeds under the weed control sheet from growing and breaking through.

【0040】[0040]

【発明の効果】本発明の防草シートによれば、耐摩耗性
に優れたものであり、防草シートの上からの歩行に耐え
るに十分な機械的強力を有し、また、雑草の成長を防止
できるものである。また、降雨等による水分も、透水性
樹脂層および不織布内を速やかに移動するため、水たま
りが発生することはない。
According to the weed control sheet of the present invention, the weed control sheet is excellent in abrasion resistance, has sufficient mechanical strength to withstand walking from above the weed control sheet, and has the growth of weeds. Can be prevented. In addition, since water due to rainfall or the like quickly moves in the water-permeable resin layer and the nonwoven fabric, puddles do not occur.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ニードルパンチ処理による三次元交絡構
造を有する長繊維不織布の片面に透水性樹脂層が積層さ
れてなり、かつ引裂強力が0.2kg以上であることを
特徴とする防草シート。
1. A grass-proof sheet comprising a long-fiber nonwoven fabric having a three-dimensional entangled structure obtained by needle punching, and a water-permeable resin layer laminated on one side thereof, and having a tear strength of 0.2 kg or more.
【請求項2】 透水性樹脂層が微多孔構造であることを
特徴とする請求項1記載の防草シート。
2. The herbicidal sheet according to claim 1, wherein the water-permeable resin layer has a microporous structure.
JP8349802A 1996-01-10 1996-12-27 Weed proofing sheet Pending JPH09248070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8349802A JPH09248070A (en) 1996-01-10 1996-12-27 Weed proofing sheet

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP207196 1996-01-10
JP8-2071 1996-01-10
JP8349802A JPH09248070A (en) 1996-01-10 1996-12-27 Weed proofing sheet

Publications (1)

Publication Number Publication Date
JPH09248070A true JPH09248070A (en) 1997-09-22

Family

ID=26335390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8349802A Pending JPH09248070A (en) 1996-01-10 1996-12-27 Weed proofing sheet

Country Status (1)

Country Link
JP (1) JPH09248070A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6407039B1 (en) 2000-05-17 2002-06-18 K.K. Ueda Shikimono Kojyo Biodegradable, weed-preventing sheet and a method of preventing generation and growth of weeds by use of the same
JP2007151486A (en) * 2005-12-07 2007-06-21 Toyobo Co Ltd Flame-retardant weedproofing sheet
KR100779925B1 (en) * 2006-11-01 2007-11-29 이현승 Mat for preventing growing weeds
KR100870900B1 (en) * 2008-01-16 2008-11-28 이현승 Mat for preventing growing weeds
KR101157089B1 (en) * 2009-02-16 2012-06-21 (주)농협아그로 Needle punching non-woven fabric for weeding
JP2015059107A (en) * 2013-09-19 2015-03-30 ユニチカ株式会社 Weed prevention sheet
CN110199744A (en) * 2019-06-10 2019-09-06 仪征丰益升非织造布有限公司 A kind of environmental protection infiltration type anti-grass cloth and production equipment
CN112160171A (en) * 2020-09-17 2021-01-01 广州市白云区新生实业有限公司 Grass-proof cloth and preparation method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6407039B1 (en) 2000-05-17 2002-06-18 K.K. Ueda Shikimono Kojyo Biodegradable, weed-preventing sheet and a method of preventing generation and growth of weeds by use of the same
JP2007151486A (en) * 2005-12-07 2007-06-21 Toyobo Co Ltd Flame-retardant weedproofing sheet
KR100779925B1 (en) * 2006-11-01 2007-11-29 이현승 Mat for preventing growing weeds
KR100870900B1 (en) * 2008-01-16 2008-11-28 이현승 Mat for preventing growing weeds
KR101157089B1 (en) * 2009-02-16 2012-06-21 (주)농협아그로 Needle punching non-woven fabric for weeding
JP2015059107A (en) * 2013-09-19 2015-03-30 ユニチカ株式会社 Weed prevention sheet
CN110199744A (en) * 2019-06-10 2019-09-06 仪征丰益升非织造布有限公司 A kind of environmental protection infiltration type anti-grass cloth and production equipment
CN112160171A (en) * 2020-09-17 2021-01-01 广州市白云区新生实业有限公司 Grass-proof cloth and preparation method thereof

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