JP4405642B2 - Non-slip protective mat used at waste disposal sites - Google Patents
Non-slip protective mat used at waste disposal sites Download PDFInfo
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- JP4405642B2 JP4405642B2 JP2000137377A JP2000137377A JP4405642B2 JP 4405642 B2 JP4405642 B2 JP 4405642B2 JP 2000137377 A JP2000137377 A JP 2000137377A JP 2000137377 A JP2000137377 A JP 2000137377A JP 4405642 B2 JP4405642 B2 JP 4405642B2
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- nonwoven fabric
- protective mat
- resin
- slip
- waste disposal
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- 230000001681 protective effect Effects 0.000 title claims description 38
- 239000002699 waste material Substances 0.000 title claims description 14
- 239000004745 nonwoven fabric Substances 0.000 claims description 66
- 229920005989 resin Polymers 0.000 claims description 26
- 239000011347 resin Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 19
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 19
- 229920003002 synthetic resin Polymers 0.000 description 11
- 239000000057 synthetic resin Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
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- 229920001577 copolymer Polymers 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N acrylic acid methyl ester Natural products COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
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- 238000005507 spraying Methods 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、廃棄物処分場にて使用される滑り止め機能付き保護マット(以下、単に「保護マット」ともいう)に関し、詳しくは、廃棄物処分場(一般廃棄物処分場、産業廃棄物最終処分場等)に敷設される遮水シートの上面に載置して当該遮水シートが外的圧力や太陽光線(紫外線を含む)などにより損傷しないように保護するための滑り止め機能付き保護マットに関し、更に詳しくは、斜度40度以上でも滑り落ちないといった優れた滑り止め機能を備えた保護マットに関する。
【0002】
【従来の技術と発明が解決しようとする課題】
廃棄物処理場は、地盤に掘られた穴によって形成され、処理場の略全域に遮水シートを敷設し、その上から当該遮水シートを保護すべく不織布を重ね合わせるのが一般的である。
【0003】
しかしながら、従来、処理場における傾斜面で、遮水シートの上面に敷設した不織布が滑り落ちるといった問題が多発したため、この問題を解消すべく、次のような手段が採られた。すなわち、遮水シートの上に不織布を敷設したのち、アンカーピンを所定間隔ごとに打ち込んで滑り落ち防止を期待するといった手段が採られた。これにより一応、遮水シート上の保護マット(不織布)が滑り落ちるといった問題は解消されるものの、ピンの打ち込みにより遮水シートの機能が損なわれるといった新たな問題が発生した。
【0004】
そのため、アンカーピンに使用に代えて次のような手法が採られた。すなわち、不織布の裏面(遮水シートと当接する側の面)に粘着加工を施し、この粘着力(接着力)を利用して不織布の滑り止めを防止する手法が採られた。
【0005】
しかしながら、この方法を採ることにより離形紙が必要となり、施工時において、不織布を敷設する度ごとに離形紙を剥がす必要があるため作業能率が低下するといった問題もさることながら、大量のゴミ(剥がされた離形紙)が発生するといった大きな社会問題を招いた。
【0006】
[発明の目的]
本発明は、上記の実情に鑑みてなされたものであり、その目的は、遮水シートの機能を損なわず、またゴミの大量発生を招かない、優れた滑り止め機能を備えた保護マットを提供するところにある。
【0007】
【課題を解決するための手段】
請求項1に記載の保護マットは、廃棄物処分場に敷設される遮水シートの上面に載置して当該遮水シートを保護するための滑り止め機能付き保護マットであって、所定厚みを有する不織布と、前記不織布の表裏いずれか一方に接合され一体化された滑り止め層とを備え、前記滑り止め層が、熱可塑性樹脂重合体よりなる直径約0.5〜2mmの連続線条体の多数本が互いに交差しながら各々水平方向に不規則にあるいは規則的に屈曲あるいは湾曲して延びるとともに前記多数本の連続線条体は互いに交差するポイントにおいて融着されてなる平面網状体からなるものである。
【0011】
請求項2に記載の保護マットは、廃棄物処分場に敷設される遮水シートの上面に載置して当該遮水シートを保護するための滑り止め機能付き保護マットであって、表裏いずれか一方に熱硬化性樹脂を塗装した所定厚みを持つ不織布からなり、前記熱可塑性樹脂の塗装は、前記不織布における樹脂塗装面側の繊維が当該樹脂により被覆される程度であって、前記不織布における樹脂塗装面側の繊維間空隙が当該樹脂により閉塞されない程度であることを特徴とするものである。
【0012】
【発明の実施の形態】
不織布
本発明の保護マットを構成する不織布は、遮水シートの保護、具体的には外的圧力や紫外線等によって遮水シートが損傷するのを防ぐ目的で、当該遮水シートの上面に敷設される。
【0013】
前記不織布としては、ポリエステル、ポリプロピレンなどの化学合成繊維からなる長繊維、短繊維を、ニードルパンチング製法、スパンボンド製法、バインダーによる接合製法などによって製造された、目付400〜1700g/cm2の不織布、反毛フエルトが挙げられるが、これによって限定されるものではない。ただ、前述したような役割を担うため、500N以上の高い貫入抵抗性を有しているものや、遮光性、耐候性、遮蔽性、耐久性に優れているものがより好適に用いられる。
【0014】
その厚みとしては、使用する廃棄物処分場の性質や規模により変わるので一概には言えないが、例えば厚み5mm〜5cmである。
【0015】
滑り止め層
上記不織布の表裏いずれか一方に取着され一体化される滑り止め層としては、
(1)熱可塑性樹脂重合体よりなる直径約0.5〜2mmの連続線条体の多数本が互いに交差しながら各々水平方向に不規則に屈曲あるいは湾曲して一方側から他方側に向けて延びるとともに前記多数本の連続線条体は互いに交差するポイントにおいて融着されてなる平面網状体からなるもの
(2)所定の幅寸法を以て、例えば互いに平行に塗布された複数列の軟質合成樹脂成形体よりなりもの
(3)起毛加工処理を施すことにより積極的に毛羽立ちを多くして摩擦抵抗を高めた他の不織布からなるもの、
(4)表裏いずれか一方に熱硬化性樹脂を塗装し硬化させてなる塗膜物よりなりもの、が挙げられる。
【0016】
上記(1)の滑り止め層において使用される熱可塑性樹脂重合体としては、成形後において軟質でゴム的性質(弾性体としての性質)を備えていることが好適であり、例えばエチレン−酢酸ビニル共重合体、エチレン−(メタ)アクリル酸共重合体、エチレン−(メタ)アクリル酸メチル共重合体、エチレン−(メタ)アクリル酸エチル共重合体、エチレン−メタクリル酸メチル−アクリル酸三元共重合体などが挙げられる。これらの重合体の単独または2種以上の混合物の溶融物を不織布の一方の面に紡出して、不織布上に連続線条体の多数本を形成するわけであるが、この際、当該連続線条体の直径は0.5mm〜2mmの範囲に抑える必要がある。連続線条体の直径が0.5mm未満の場合には、紡糸孔(紡出孔)の目詰まりが生じやすく紡糸工程が円滑に行なわれなくなり、また不織布の上に紡出した際に当該不織布の内部に入り込んでしまい、滑り止め機能がそれほど期待できない場合が生じるおそれが十分にある。連続線条体の直径が2mmを超える場合、必要以上に樹脂量が多くなって不経済を招くというばかりか、不織布における滑り止め層側の平滑性が著しく損なわれ、滑り止め機能に支障を来す可能性がある。なお、より好ましい範囲は直径1〜2mmである。
【0017】
また、上記連続線条体の多数本によって不織布の面上に平面網状体が形成するわけであるが、当該平面網状体の目付は、例えば300〜600g/m2であることが、滑り止め機能が最大限に発揮されるという理由で好ましい。
【0018】
上記構成の(1)の滑り止め層にあっては、不織布の面上において、連続線条体の多数本が互いに交差しながら各々水平方向に不規則に屈曲あるいは湾曲して一方側から他方側に向けて延びるとともに前記多数本の連続線条体は互いに交差するポイントにおいて融着された平面網状体が形成されているので、この滑り止め層を遮水シートの上面に加圧することにより平面網状体における網目の部分が遮水シートの上面に対して吸盤のように働き、多数本の連続線条体自身による滑り止め効果と相俟って、遮水シートと保護マットとが互いにしっかりと吸着してズレ(滑り落ち)が防止できる。
【0019】
上記(2)の滑り止め層において使用される合成樹脂としては、成形後において軟質でゴム的性質(弾性体としての性質)を備えていることが好適であり、例えばエチレン−酢酸ビニル共重合体、エチレン−(メタ)アクリル酸共重合体、エチレン−(メタ)アクリル酸メチル共重合体、エチレン−(メタ)アクリル酸エチル共重合体、エチレン−メタクリル酸メチル−アクリル酸三元共重合体などが挙げられる。この(2)の滑り止め層は、上述したように、所定の幅寸法を以て、例えば互いに平行に塗布された複数列の軟質合成樹脂成形体よりなるものであるが、塗装の際、前記した1列の軟質合成樹脂成形体と、これと隣り合う他の列の軟質合成樹脂成形体との間に、該軟質合成樹脂成形体が付与されていないかあるいは塗工厚みを比較的薄くした“粗なる部分”を存在させる必要がある。
【0020】
このような構造の滑り止め層を備えた保護マットを遮水シートの上面に加圧することにより、複数列の軟質合成樹脂成形体の中間に存在する“粗なる部分”が遮水シートの上面に対して吸盤のように働き、多数列の軟質合成樹脂成形体自身による滑り止め効果と相俟って、遮水シートと保護マットとが互いにしっかりと吸着してズレ(滑り落ち)が防止できる。
【0021】
前記軟質合成樹脂成形体の厚みとしては、例えば0.5mm〜2mmであり、軟質合成樹脂成形体の1列分の幅寸法としては、例えば5mm〜5cmであり、前記“粗なる部分”の幅寸法は、例えば0.5mm〜5mm程度である。
【0022】
上記(3)の滑り止め層は、前述したように、積極的に毛羽立ちを多くして摩擦抵抗を高めた他の不織布からなり、この不織布を前記不織布の下面に接合(重合)して保護マットを形成するわけであるが、毛羽立ちを多くすれば、繊維自身の、遮水シート上面に対するロック効果(係止効果)が上昇(向上)し、これにより優れた滑り止め機能が発揮する。従って、滑り止め層を持たせる不織布の繊維径を比較的大きくすることが好適である。
【0023】
なお、毛羽立ちを多くする方法としては、例えば既存の不織布の片面を、針のような先の尖ったもので数回にわたり引っ掻く方法などが挙げられる。
【0024】
また、滑り止め層を構成する不織布と、保護マット本体を構成する不織布との接合方法としては特に限定はなく、接着剤による接合方法を採ってもよいが、強固に接合することができるという理由で、互いをニードルパンチングにより接合することが好ましい。
【0025】
上記(4)の滑り止め層に関し、不織布に塗装する熱可塑性樹脂としては特に限定はなく、例えばポリエステル樹脂、酢酸ビニル樹脂、エチレン−酢酸ビニル共重合体、エチレン−(メタ)アクリル酸共重合体、エチレン−(メタ)アクリル酸メチル共重合体、エチレン−(メタ)アクリル酸エチル共重合体、エチレン−メタクリル酸メチル−アクリル酸三元共重合体などが挙げられる。
【0026】
不織布に対する樹脂の塗布量としては、前記不織布における樹脂塗装面側の繊維が当該樹脂により被覆される程度であって、前記不織布における樹脂塗装面側の繊維間空隙が当該樹脂により閉塞されない程度であり、具体的には、およそのところ、200〜400g/m2である。
【0027】
上記樹脂の単独または2種以上の混合物を、不織布の一方の面全域あるいは略全域に対して、例えばスプレー塗装し、のち硬化させることにより、不織布における塗布した側の各繊維が当該樹脂により被覆され、これにより、前記塗装物により剛性を確保した不織布の繊維群が遮水シート上面に対するロック効果(係止効果)が上昇(向上)し、これにより優れた滑り止め機能を発揮する。
【0028】
【実施例】
本発明の一実施例を図面に基づいて説明するが、本発明はこれによって限定されるものではない。
【0029】
実施例1
本発明の保護マット(10)の一例を図1に示す。図に示されているように、保護マット(10)は不織布(12)と平面網状体(14)により構成されている。すなわち、例えば、エチレン−酢酸ビニル共重合体(EVA)の多数の連続線条体(16)によって形成された平面網状体(14)が、不織布(12)の片面側に接合(熱融着)され、当該平面網状体(14)によって滑り止め層が形成されている。
【0030】
上記構成の保護マット(10)は、例えば図2に略示した装置を用いることによって能率的に製造することができる。すなわち、図示したように、一方向に向けて走行する無端ベルトを備えた搬送体(20)の上に、長尺状の不織布(12)が載せられながら同方向に走行している。
【0031】
符号(22)は、走行する不織布(12)の上方に設けられた紡糸口金であり、その下面において、紡糸孔(図示せず。孔径は例えば、0.5mm、1mm)の多数が5mmピッチで幅方向に複数列設されている。この紡糸孔から、熱可塑性樹脂の溶融物、例えばEVAの溶融物が連続線条体(16)として紡出され、下方に向けて自然落下する。なお、無端ベルトを備えた搬送体(20)は、上記した紡出連続線条体(16)の落下速度よりも遅い速度で移動している。これにより、紡糸孔から落下する紡出連続線条体(16)の多数本が、走行する不織布(12)の上面にて、互いに湾曲し、交差(交絡)しながらそれぞれ不規則な形状を描いて順次集積される。
【0032】
不織布(12)の上に網状に落下した紡出連続線条体(16)の多数本は次第に固化するわけであるが、完全に固化する前に、不織布(12)上の紡出連続線条体(16)の多数本を加圧ロール(26)によって加圧し、各連続線条体(16)自身が持つ接着力で以て不織布(12)に当該線条体を圧着するとともに連続線条体(16)を扁平化し、平面網状体(14)として形成せしめる。その際、交差点において互いに自己融着する。これにより、不織布(12)と平面網状体(14)が一体化した保護マット(10)が得られる。
【0033】
上記実施例では、連続線条体(16)の多数本を不規則に湾曲させたが、これに限らず、図3に示すように、規則的に湾曲あるいは屈曲させてもよい。
【0034】
実施例2
図4、図5に示すように、本発明の保護マット(10)本体を構成する不織布(12)の裏面に対し、幅15mm、厚み1mmで以て軟質合成樹脂(EVA)を、従来公知の方法により複数列塗工して硬化させ、不織布(12)の裏面上に複数列のEVA成形体(28)を得た。このとき、1列のEVA成形体(28)と、これと隣り合う他の列のEVA成形体(28)との間に、当該EVA成形体(28)が付与されていない粗なる部分(30)を、溝状に存在させた。この粗なる部分(30)の幅は、本実施例において1mmとした。
【0035】
なお、本実施例では、EVA成形体(28)の各列を直線状に設けたが、これに限らず、図6に示すように、(a)各々を蛇行させても良いし、(b)各々をL字状に屈曲させてもよい。もちろん、いずれの場合にも、1列のEVA成形体(28)と、これと隣り合う他の列のEVA成形体(28)との間に、当該EVA成形体(28)が付与されていない粗なる部分(30)を溝状に設ける。
【0036】
実施例3
本発明の保護マット(10)本体を構成する不織布(12)とは別に不織布を用意し、この不織布の一方の面に対し、多数本の金属針が植設された剣山状の起毛具を用いて数回引っ掻き加工(起毛加工)を行なった。これにより、前記した別の不織布の片面における繊維の立ち上がり(毛羽立ち)が多くなった。
【0037】
その後、上記構成の不織布を、保護マット本体を構成する不織布(12)と重ね合わせ(起毛加工を施した側を外側にして重ねあわせ)、ニードルパンチ法によって両不織布を一体化した。
【0038】
実施例4
本発明の保護マット(10)本体を構成する不織布(12)の片面全域にEVAをスプレー塗装し、これにより保護マット(10)を製造した。この際、EVAの塗装は、不織布(12)における樹脂塗布面側の繊維が当該樹脂により被覆される程度であって、不織布(12)における樹脂塗布面側が当該樹脂により閉塞されない程度とした。具体的には、不織布(12)の片面全域に対し、EVA200〜400g/cm2をスプレー塗装した。
【0039】
なお、スプレー塗装に代えてロール塗装を行ってもよく、それ以外の塗装方法でも構わないが、不織布(12)における樹脂塗装面側の繊維間空隙が当該樹脂により閉塞されない程度に塗装する必要があるので、どちらかといえばスプレー塗装が最適である。
【0040】
保護マットの敷設施工
上記の実施例1〜4で得られた保護マット(10)の敷設状態を図7に示す。図7に示すように、廃棄物処理場は、予め地盤に掘られた穴の上に、遮水シート(S)を敷設し、その上から当該遮水シート(S)を保護すべく保護マット(10)を重ね合わせることにより構築される。
【0041】
【発明の効果】
本発明により、遮水シートの機能を損なわず、またゴミの大量発生を招かない、優れた滑り止め機能を備えた保護マットを提供することができる。
【図面の簡単な説明】
【図1】本発明の保護マットの一実施例を示す斜視図である。
【図2】前図の保護マットの一製造装置を示す略示説明図である。
【図3】他の保護マットを示す斜視図である。
【図4】さらに他の実施例を示す斜視図である。
【図5】前図におけるV−V線断面図である。
【図6】さらに他の実施例を示す斜視図である。
【図7】本発明の保護マットを敷設した状態を示す部分拡大略示説明図である。
【符号の説明】
10……保護マット
12……不織布
14……平面網状体
16……連続線条体
28……EVA成形体
30……粗なる部分
S……遮水シート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a protective mat with a non-slip function (hereinafter also simply referred to as “protective mat”) used in a waste disposal site, and more particularly, to a waste disposal site (general waste disposal site, industrial waste final waste). Protective mat with anti-slip function that is placed on the top surface of a water-proof sheet laid at a disposal site, etc., and protects the water-proof sheet from being damaged by external pressure or sunlight (including ultraviolet rays) More particularly, the present invention relates to a protective mat having an excellent anti-slip function that does not slip even when the inclination is 40 degrees or more.
[0002]
[Prior art and problems to be solved by the invention]
A waste treatment plant is generally formed by holes dug in the ground, and a water-impervious sheet is laid on almost the entire area of the treatment plant, and a non-woven fabric is generally stacked on top of it to protect the water-impervious sheet. .
[0003]
However, conventionally, there has been a problem that the nonwoven fabric laid on the upper surface of the water-impervious sheet slips on the inclined surface in the treatment plant, and the following measures have been taken to solve this problem. That is, after laying a non-woven fabric on a water-impervious sheet, a means was adopted in which anchor pins were driven at predetermined intervals to expect slip-off prevention. As a result, the problem that the protective mat (nonwoven fabric) on the water-impervious sheet slips down is solved, but a new problem that the function of the water-impervious sheet is impaired by the driving of the pins has occurred.
[0004]
Therefore, the following technique was adopted instead of using the anchor pin. That is, a technique has been adopted in which the back surface of the nonwoven fabric (the surface on the side in contact with the water-impervious sheet) is subjected to adhesive processing, and the nonwoven fabric is prevented from slipping using this adhesive force (adhesive force).
[0005]
However, by adopting this method, a release paper is required. During construction, it is necessary to peel the release paper every time a non-woven fabric is laid. This has led to major social problems such as (released release paper).
[0006]
[Object of invention]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a protective mat having an excellent anti-slip function that does not impair the function of the water shielding sheet and does not cause a large amount of dust generation. There is a place to do.
[0007]
[Means for Solving the Problems]
The protective mat according to claim 1 is a protective mat with a non-slip function for protecting the water shielding sheet placed on the upper surface of the water shielding sheet laid at the waste disposal site, and having a predetermined thickness. A non-woven fabric having a non-slip layer bonded to and integrated with either the front or back of the non-woven fabric, and the anti-slip layer is a continuous filament having a diameter of about 0.5 to 2 mm made of a thermoplastic resin polymer. The plurality of continuous wires extend irregularly or regularly bent or curved in the horizontal direction while intersecting with each other, and the plurality of continuous filaments are formed of a planar network that is fused at points intersecting each other. Is.
[0011]
The protective mat according to claim 2 is a protective mat with a non-slip function for protecting the water shielding sheet placed on the upper surface of the water shielding sheet laid in the waste disposal site, either front or back It consists of a non-woven fabric having a predetermined thickness coated with a thermosetting resin on one side, and the coating of the thermoplastic resin is such that the fiber on the resin coating surface side of the non-woven fabric is covered with the resin, and the resin in the non-woven fabric The inter-fiber gap on the painted surface side is such that it is not blocked by the resin.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Non-woven fabric The nonwoven fabric constituting the protective mat of the present invention is a protective sheet for protecting the waterproof sheet, specifically, for preventing the waterproof sheet from being damaged by external pressure or ultraviolet rays. Laying on the top.
[0013]
As the nonwoven fabric, a nonwoven fabric having a basis weight of 400 to 1700 g / cm 2 manufactured by a needle punching manufacturing method, a spunbond manufacturing method, a bonding manufacturing method using a binder, etc. Examples include, but are not limited to, anti-hair felt. However, since it plays a role as described above, a material having a high penetration resistance of 500 N or more and a material excellent in light shielding properties, weather resistance, shielding properties, and durability are more preferably used.
[0014]
The thickness varies depending on the nature and scale of the waste disposal site to be used, so it cannot be generally stated. For example, the thickness is 5 mm to 5 cm.
[0015]
Anti-slip layer <br/> As the anti-slip layer attached to and integrated with either the front or back of the nonwoven fabric,
(1) A large number of continuous filaments having a diameter of about 0.5 to 2 mm made of a thermoplastic resin polymer are irregularly bent or curved in the horizontal direction while crossing each other, and directed from one side to the other side. The plurality of continuous filaments are formed of a planar network formed by fusing at points intersecting each other. (2) A plurality of rows of soft synthetic resin molded in parallel with each other with a predetermined width dimension, for example. Consists of body (3) Consists of other non-woven fabrics that have increased fluffing and increased frictional resistance by applying brushing processing,
(4) What consists of a coating material formed by coating and curing a thermosetting resin on either the front or back side.
[0016]
As the thermoplastic resin polymer used in the anti-slip layer of (1) above, it is preferable that it is soft and has rubber-like properties (properties as an elastic body) after molding, such as ethylene-vinyl acetate. Copolymer, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) methyl acrylate copolymer, ethylene- (meth) ethyl acrylate copolymer, ethylene-methyl methacrylate-acrylic acid ternary copolymer A polymer etc. are mentioned. A melt of a single polymer or a mixture of two or more of these polymers is spun onto one surface of a nonwoven fabric to form a large number of continuous filaments on the nonwoven fabric. It is necessary to keep the diameter of the strip within a range of 0.5 mm to 2 mm. When the diameter of the continuous filament is less than 0.5 mm, the spinning hole (spinning hole) is likely to be clogged, and the spinning process is not smoothly performed. The anti-slip function may not be expected so much. If the diameter of the continuous filaments exceeds 2 mm, the amount of resin will increase more than necessary, resulting in uneconomical effects, and the smoothness of the non-slip layer side of the nonwoven fabric will be significantly impaired, resulting in a problem with the anti-slip function. There is a possibility. A more preferable range is 1 to 2 mm in diameter.
[0017]
Moreover, although a plane network body is formed on the surface of the nonwoven fabric by a large number of the above-mentioned continuous filaments, the basis weight of the plane network body is, for example, 300 to 600 g / m 2 to prevent slippage. Is preferable because the maximum is exhibited.
[0018]
In the anti-slip layer of (1) having the above configuration, on the surface of the nonwoven fabric, a large number of continuous filaments intersect each other and bend or curve irregularly in the horizontal direction, respectively, from one side to the other side. Since the planar continuous mesh is formed at the points where the multiple continuous filaments intersect with each other, the planar mesh is formed by pressing the anti-slip layer on the upper surface of the water shielding sheet. The mesh portion of the body works like a suction cup against the top surface of the water-impervious sheet, combined with the anti-slip effect of a large number of continuous filaments themselves, and the water-impervious sheet and the protective mat firmly adhere to each other Thus, slippage can be prevented.
[0019]
The synthetic resin used in the anti-slip layer of (2) is preferably soft and rubbery (molded as an elastic body) after molding, such as an ethylene-vinyl acetate copolymer. , Ethylene- (meth) acrylic acid copolymer, ethylene- (meth) methyl acrylate copolymer, ethylene- (meth) ethyl acrylate copolymer, ethylene-methyl methacrylate-acrylic acid terpolymer, etc. Is mentioned. As described above, the anti-slip layer (2) is composed of, for example, a plurality of rows of soft synthetic resin molded bodies applied in parallel with each other with a predetermined width dimension. Between the soft synthetic resin moldings in a row and the soft synthetic resin moldings in the other row adjacent thereto, the soft synthetic resin moldings are not provided or the coating thickness is relatively thin. Must be present.
[0020]
By pressing a protective mat having a non-slip layer having such a structure onto the upper surface of the water-impervious sheet, a “rough portion” existing in the middle of the plurality of rows of soft synthetic resin moldings is formed on the upper surface of the water-impermeable sheet. On the other hand, it works like a suction cup and, together with the anti-slip effect of the multiple rows of soft synthetic resin moldings themselves, the water-impervious sheet and the protective mat firmly adhere to each other and can prevent slippage.
[0021]
The thickness of the soft synthetic resin molded body is, for example, 0.5 mm to 2 mm, the width dimension for one row of the soft synthetic resin molded body is, for example, 5 mm to 5 cm, and the width of the “rough part”. The dimension is, for example, about 0.5 mm to 5 mm.
[0022]
As described above, the anti-slip layer of (3) is composed of another nonwoven fabric that has been actively increased in fluff to increase frictional resistance, and this nonwoven fabric is bonded (polymerized) to the lower surface of the nonwoven fabric to protect the mat. However, if the fluff is increased, the locking effect (locking effect) of the fiber itself with respect to the upper surface of the water-impervious sheet is increased (improved), thereby exhibiting an excellent anti-slip function. Therefore, it is preferable to relatively increase the fiber diameter of the nonwoven fabric having the anti-slip layer.
[0023]
In addition, as a method of increasing fuzzing, for example, a method of scratching one side of an existing non-woven fabric several times with a pointed tip such as a needle, or the like can be mentioned.
[0024]
In addition, there is no particular limitation on the bonding method between the nonwoven fabric constituting the anti-slip layer and the nonwoven fabric constituting the protective mat body, and a bonding method using an adhesive may be employed, but the reason that the bonding can be firmly performed Therefore, it is preferable to join each other by needle punching.
[0025]
Regarding the anti-slip layer of (4) above, there is no particular limitation on the thermoplastic resin to be applied to the nonwoven fabric. For example, polyester resin, vinyl acetate resin, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid copolymer And ethylene- (meth) acrylate methyl copolymer, ethylene- (meth) ethyl acrylate copolymer, ethylene-methyl methacrylate-acrylic acid terpolymer.
[0026]
The amount of resin applied to the nonwoven fabric is such that the fibers on the resin coated surface side of the nonwoven fabric are covered with the resin, and the interfiber spaces on the resin coated surface side of the nonwoven fabric are not blocked by the resin. Specifically, it is approximately 200 to 400 g / m 2 .
[0027]
Each of the fibers on the coated side of the nonwoven fabric is coated with the resin by, for example, spray-coating the single or a mixture of two or more of the above resins over one surface or substantially the entire surface of the nonwoven fabric, for example, and then curing. As a result, the non-woven fabric group of which the rigidity is ensured by the coated material increases (improves) the locking effect (locking effect) with respect to the upper surface of the water-impervious sheet, thereby exhibiting an excellent anti-slip function.
[0028]
【Example】
An embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
[0029]
Example 1
An example of the protective mat (10) of the present invention is shown in FIG. As shown in the figure, the protective mat (10) is composed of a nonwoven fabric (12) and a planar network (14). That is, for example, a planar network (14) formed by a large number of continuous filaments (16) of an ethylene-vinyl acetate copolymer (EVA) is bonded to one side of the nonwoven fabric (12) (thermal fusion). Then, the anti-slip layer is formed by the planar network (14).
[0030]
The protective mat (10) having the above configuration can be efficiently manufactured by using, for example, the apparatus schematically shown in FIG. That is, as shown in the figure, the long nonwoven fabric (12) travels in the same direction on the carrier (20) provided with an endless belt that travels in one direction.
[0031]
Reference numeral (22) is a spinneret provided above the traveling nonwoven fabric (12), and on its lower surface, a large number of spinning holes (not shown; hole diameters, for example, 0.5 mm, 1 mm) are 5 mm pitches. Multiple rows are provided in the width direction. From this spinning hole, a melt of a thermoplastic resin, for example, a melt of EVA is spun as a continuous filament (16) and spontaneously falls downward. In addition, the conveyance body (20) provided with the endless belt is moving at a speed slower than the dropping speed of the spinning continuous linear body (16). As a result, a large number of the continuous spinning filaments (16) falling from the spinning holes are curved on each other on the upper surface of the traveling nonwoven fabric (12), and draw irregular shapes while intersecting (entangled). Are sequentially accumulated.
[0032]
A large number of the spun continuous filaments (16) dropped in a net form on the non-woven fabric (12) are gradually solidified, but before they are completely solidified, the spun continuous filaments on the non-woven fabric (12) are solidified. A large number of the bodies (16) are pressed by the pressure roll (26), and the continuous filaments are crimped to the nonwoven fabric (12) with the adhesive strength of each continuous filament (16) itself. The body (16) is flattened and formed as a planar network (14). At that time, they self-fuse with each other at the intersection. Thereby, the protective mat (10) with which the nonwoven fabric (12) and the planar mesh body (14) were integrated is obtained.
[0033]
In the above embodiment, a large number of the continuous filaments (16) are irregularly curved. However, the present invention is not limited to this, and it may be curved or bent regularly as shown in FIG.
[0034]
Example 2
As shown in FIG. 4 and FIG. 5, a soft synthetic resin (EVA) having a width of 15 mm and a thickness of 1 mm with respect to the back surface of the nonwoven fabric (12) constituting the main body of the protective mat (10) of the present invention is conventionally known. A plurality of rows of EVA molded bodies (28) were obtained on the back surface of the nonwoven fabric (12) by applying a plurality of rows by the method and curing. At this time, between the EVA molded bodies (28) in one row and the EVA molded bodies (28) in another row adjacent thereto, a rough portion to which the EVA molded body (28) is not applied (30 ) Was present in the form of grooves. The width of the rough portion (30) was 1 mm in this example.
[0035]
In this embodiment, each row of the EVA molded bodies (28) is provided in a straight line. However, the present invention is not limited to this, and as shown in FIG. 6, (a) each may meander, ) Each may be bent in an L shape. Of course, in any case, the EVA molded body (28) is not provided between one row of EVA molded bodies (28) and another row of EVA molded bodies (28) adjacent thereto. A rough portion (30) is provided in a groove shape.
[0036]
Example 3
A nonwoven fabric is prepared separately from the nonwoven fabric (12) constituting the main body of the protective mat (10) of the present invention, and a sword-like raised tool in which a large number of metal needles are implanted on one surface of the nonwoven fabric is used. Then, scratching (raising) was performed several times. Thereby, the fiber rising (fluffing) on one side of the other nonwoven fabric described above increased.
[0037]
Then, the nonwoven fabric of the said structure was overlap | superposed with the nonwoven fabric (12) which comprises a protection mat main body (it piled up with the side which gave the raising process outside), and both nonwoven fabrics were integrated by the needle punch method.
[0038]
Example 4
EVA was spray-coated over the entire area of one side of the nonwoven fabric (12) constituting the main body of the protective mat (10) of the present invention, thereby producing the protective mat (10). At this time, the EVA coating was such that the fibers on the resin-coated surface side of the nonwoven fabric (12) were covered with the resin, and the resin-coated surface side of the nonwoven fabric (12) was not blocked by the resin. Specifically, EVA 200-400 g / cm < 2 > was spray-coated with respect to the one side whole area of a nonwoven fabric (12).
[0039]
Note that roll coating may be performed instead of spray coating, and other coating methods may be used. However, it is necessary to apply the coating so that the inter-fiber voids on the resin coating surface side of the nonwoven fabric (12) are not blocked by the resin. Because there is, spray painting is the best.
[0040]
Laying construction of the protective mat The laying state of the protective mat (10) obtained in Examples 1 to 4 is shown in Fig. 7. As shown in FIG. 7, in the waste disposal site, a water-proof sheet (S) is laid on a hole dug in advance in the ground, and a protective mat is provided to protect the water-proof sheet (S) from above. It is constructed by superimposing (10).
[0041]
【The invention's effect】
According to the present invention, it is possible to provide a protective mat having an excellent anti-slip function that does not impair the function of the water shielding sheet and does not cause a large amount of dust.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a protective mat according to the present invention.
FIG. 2 is a schematic explanatory view showing an apparatus for manufacturing the protective mat shown in the previous figure.
FIG. 3 is a perspective view showing another protective mat.
FIG. 4 is a perspective view showing still another embodiment.
FIG. 5 is a cross-sectional view taken along line VV in the previous figure.
FIG. 6 is a perspective view showing still another embodiment.
FIG. 7 is a partially enlarged schematic explanatory view showing a state in which the protective mat of the present invention is laid.
[Explanation of symbols]
DESCRIPTION OF
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000137377A JP4405642B2 (en) | 2000-05-10 | 2000-05-10 | Non-slip protective mat used at waste disposal sites |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000137377A JP4405642B2 (en) | 2000-05-10 | 2000-05-10 | Non-slip protective mat used at waste disposal sites |
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| Publication Number | Publication Date |
|---|---|
| JP2001314830A JP2001314830A (en) | 2001-11-13 |
| JP4405642B2 true JP4405642B2 (en) | 2010-01-27 |
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| JP2000137377A Expired - Fee Related JP4405642B2 (en) | 2000-05-10 | 2000-05-10 | Non-slip protective mat used at waste disposal sites |
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| JP2007160174A (en) * | 2005-12-12 | 2007-06-28 | Toyobo Co Ltd | Capping sheet and its capping method of construction |
| JP4630186B2 (en) * | 2005-12-12 | 2011-02-09 | 呉羽テック株式会社 | Auxiliary sheet for soil covering |
| JP2008264693A (en) * | 2007-04-20 | 2008-11-06 | Tanaka:Kk | Replacement mat for slope protection material |
| JP2016180214A (en) * | 2015-03-23 | 2016-10-13 | 株式会社田中 | Civil engineering structure, and construction method thereof |
| KR102438555B1 (en) * | 2021-06-24 | 2022-09-01 | 박병기 | Waterproofing method of gable roof and flat roof roof floor using non-slip composite sheet |
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