JP6634643B2 - 有害ガス難発生敷物用の難燃性面状体 - Google Patents
有害ガス難発生敷物用の難燃性面状体 Download PDFInfo
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- JP6634643B2 JP6634643B2 JP2013243305A JP2013243305A JP6634643B2 JP 6634643 B2 JP6634643 B2 JP 6634643B2 JP 2013243305 A JP2013243305 A JP 2013243305A JP 2013243305 A JP2013243305 A JP 2013243305A JP 6634643 B2 JP6634643 B2 JP 6634643B2
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- Prior art keywords
- flame
- eva
- retardant
- planar body
- resin
- 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.)
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Images
Classifications
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/682—Needled nonwoven fabric
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
尚、本発明でいう難燃性面状体を用いた有害ガス難発生敷物とは、発煙性・燃焼毒性試験の試験方法で認定された敷物をいう。
又、船舶等の逃げ場のない場所で火災が発生した場合には、死傷者が多数発生する大災害に発展し、深刻な事態に陥るため、難燃性及び耐火性はもとより耐炎性及び有害ガス発生について厳しい基準が設けられており、よって本願発明者は、特許第4351220号を開発し、難燃性及び耐火性はもとより耐炎性に優れ、有害ガスが発生しにくい敷物を開発した。
尚、かかる敷物のクッション性は、表皮材層とバッキング材層の不織繊維集合体が担うことになるが、表皮材層においては、ポリエステル繊維製不織布よりなる一次基布の表面に羊毛100%のパイル糸によりパイルを形成してなることからある程度のクッション性は備えてはいるが、特に難燃性及び耐火性はもとより耐炎性を備えることで有害ガスが発生し難いという機能を有しつつ、最適なクッション性をも備えたバッキング材層の開発が望まれていた。
よって、熱可塑性樹脂としてのEVA樹脂層中にアセチル基が存在する場合には、ポリホウ酸ナトリウム及び可撓性面状本体を形成するポリプロピレン不織布との両方に水素結合が強く作用しつつ優れた難燃性を有する難燃性面状体を形成することが出来るという効果がある。
更に、熱可塑性樹脂としてのEVA樹脂層に、EVA樹脂量の2〜5%のデンプンを混合した場合には、ポリホウ酸ナトリウムをポリプロピレン不織布に付着させる場合におけ る双方の密着性をデンプンを介して更に向上させることが出来るという効果がある。
更に、EVA樹脂に、水酸化アルミニウム又は水酸化マグネシウムを加えた場合には、難燃性を更に高めることが出来るという効果がある。
更に、EVA樹脂に、炭酸カルシウムを混合した場合にも、難燃性を更に高めることが出来るという効果がある。
更に、熱可塑性樹脂の融点が、通常、有害ガス難発生敷物敷物等のバッキング材等に使用されている、例えば樹脂材料の塩化ビニル樹脂より低い低温特性を有してなる場合には、ポリホウ酸ナトリウムを発泡化させることなく効率よく熱可塑性樹脂と混練することが出来るという効果を奏する。
更に、ポリホウ酸ナトリウムという無機物を用いることで、環境に負荷をかけることがないばかりか、シックハウス等の有害な化学物質も生じないという効果もある。
更に、エチレン・酢酸ビニル共重合体樹脂は、アセチル基を有してなることから、ポリホウ酸ナトリウム及び可撓性面状本体(ポリプロピレン不織布)の両方に水素結合が強く作用しつつ優れた難燃性を有する難燃性面状体を形成することが出来るという効果を有するだけでなく、ポリホウ酸ナトリウムという無機物を用いることで、環境に負荷をかけることがないばかりか、シックハウス等の有害な化学物質も発生しないという効果がある。
かかる難燃性面状体は、特に材質は限定するものではないが、例えば、ポリエステル系繊維不織布から形成された可撓性面状本体の一面側又は他面側の少なくとも何れか一方に、少なくともポリホウ酸ナトリウムとアセチル基及び樹脂材料の塩化ビニル樹脂より低い融点を持つ低温特性を備えた熱可塑性樹脂が混練された熱可塑性樹脂層が設けられている。
よって、特に熱可塑性樹脂の種類等も限定しないが、該熱可塑性樹脂中にアセチル基が存在する場合には、ポリホウ酸ナトリウム及び可撓性面状本体の両方に水素結合が強く作用して優れた難燃性を有する難燃性面状体を形成することが出来るという効果がある。
更に、熱可塑性樹脂の融点が、通常、有害ガス難発生敷物敷物等のバッキング材等に使用されている、樹脂材料の塩化ビニル樹脂より低い低温特性を有してなる場合には、ポリホウ酸ナトリウムを発泡化させることなく効率よく熱可塑性樹脂と混練することが出来るという利点がある。
更に、エチレン・酢酸ビニル共重合体樹脂は、アセチル基を有してなることから、ポリホウ酸ナトリウム及び可撓性面状本体(例えば、ポリエステル繊維系不織布等で形成した場合等)の両方に水素結合が強く作用しつつ優れた難燃性を有する難燃性面状体を形成することが出来るという利点があるばかりか、ポリホウ酸ナトリウムという無機物を用いることで、環境に負荷をかけることがないばかりか、シックハウス等の有害な化学物質も発生しないという大きな利点もある。
ここで、難燃性面状体の縮み又は反りとは、床等に塗布された接着剤が難燃性面状体の主としてバッキング材層に吸収されることで生じるものであり、よって、例えば接着剤がバッキング材層に吸収されるのを阻止すべく、例えば、ポリエチレン等の樹脂シートを貼り付けてもよく、具体的な難燃性面状体の縮み、反り等を抑制する抑制手段の具体的な材質、構成等も決して限定されない。
例えば、EVA系樹脂層において、酢酸ビニルの含有量を増加させた場合には、弾性、柔軟性が向上することとなり、しいては防振性や吸音性を高めることが可能となる。
具体的な防振手段や吸音手段は一切限定されないが、少なくとも何れか一方が具備された場合には、振動や静穏が望まれる個々の場所に、難燃性面状体を接着剤等を介して付設することが出来るという利点がある
先ず、実施形態において、EVA系エマルションは、固形分5〜80%、好ましくは10〜60%のEVAエマルションに対して、ポリホウ酸ナトリウムの粉末を混合することで得られるものである。
ポリホウ酸ナトリウムの粉末は、商品名「ファイレスBリキッド」(株式会社トラストライフ製)の水溶液からスプレードライ法やフリーズドライ法にて得ることが出来る。
ファイアレスBリキッドは、ポリホウ酸ナトリウムの濃度をホウ酸又はホウ砂単独の溶解度(20℃)以上に濃くした水溶液であり、ポリホウ酸ナトリウムの粉末の混合量は、EVAエマルション(固形分)に対して60〜150質量%の範囲が望ましい。
ポリホウ酸ナトリウムの粉末添加量は、EVA樹脂に対して、5〜120%の範囲、好ましくは、20〜100%の範囲とする。
EVA樹脂は、樹脂中の酢酸ビニルの配合割合が高くなるにつれて融点が低くなる。
EVA樹脂中の酢酸ビニルの配合割合が質量で10%の場合に融点は94℃であった。
また、上記割合が33%のとき、融点は61℃であった。
EVA樹脂とポリホウ酸ナトリウムの混練工程を考慮すれば、EVA樹脂中の酢酸ビニルの配合割合は、10〜40質量%の範囲が望ましい。
これに対し、本発明におけるEVA系樹脂層は、煙が発生することなく、また環境に負荷をかけることがないばかりか、シックハウス等の有害な化学物質も生じない難燃部材としてだけではなく、接着性樹脂としても優れている。
そこで、表面にパイルを形成して一次基布として利用できる難燃性面状体の裏面に、EVA系エマルションを塗布乾燥させたEVA系エマルション塗布層又はEVA系樹脂層の少なくとも何れか一方を設けてバッキング材層を積層してもよい。
これにより、EVA樹脂とポリホウ酸ナトリウムの含有部分が難燃化作用及び接着作用を有して機能することになるのである。
更に、内装材が長尺敷物等である場合に、従来から使用されているジュートをバッキング材に用いてもよく、又麻と綿の混紡材をバッキング材に用いてもよく、バッキング材の具体的な材料、製造方法等も一切限定されない。
また、タイル状の敷物の場合に耐炎化繊維不織布をバッキング材層として積層してもよいのは言うまでもない。
よって、例えば、EVA樹脂中にEVA樹脂と同質量のタングステン粉末を混合した厚み1mmのシートを用いて汚染土壌にて計測をしたところ、シートを被せる前の放射線量が11.0μSv/hから被せた後には、5.0μSv/hと約55%減少したことで立証された。
タングステン粉末は、EVA樹脂質量に対して10〜500%混合可能であるが、好ましくは、50〜400%の範囲がよい。
また、これらの金属粉末を混合すると防振、吸音(防音、遮音)効果も有することも可能となる。
先ず、パイル素材としてウール糸を用い、ポリエステル不織布からなる基布(可撓性面状本体)の裏面に、固形分50%のEVAエマルションに対してこの固形分とほぼ同質量のポリホウ酸ナトリウムの粉末を添加したEVA系エマルションを塗布し、その後乾燥させた試験片A(図示せず)を準備した。
この試験片Aを断面が垂直となる様に垂下して、1300℃のバーナーの炎を直接接炎したが、ポリホウ酸ナトリウムが発泡し、炭化が確認されるものの着火するには至らなかった。
このようなポリホウ酸ナトリウムを添加した不燃機能を備えたEVA樹脂は、不燃性樹脂材料として不燃樹脂成形品、高電圧電線不燃被覆材、不燃機器材料、建材サッシ等の不燃資材、不燃接着剤としても使用可能である。
よって、柔軟性のあるシートとして、例えば、汚染土壌等の各種工場等の配管等への放射線遮蔽巻き付け資材、放射線管理室等放射線遮蔽不燃資材、内在に不燃繊維を使用し引張強度を高めた放射線遮蔽不燃シート資材、放射線遮蔽服不燃資材、放射線遮蔽不燃クロス、樹脂成型による放射線遮蔽不燃資材等に適用できるという優れた効果がある。
かかる有害ガス難発生敷物の製造方法は、以下の各工程からバッキング材層、難燃性面状体を用いた表皮材層等を形成しつつ有害ガス難発生敷物を製造するものである。
要は、バッキング材層10が、ピッチ系炭素繊維又はPAN系炭素繊維の少なくとも何れか一方と、ポリエステル系繊維を混綿した不織繊維集合体であればよい。
試験は、国際海事機関(IMO)の「火災試験方法の適用に関する国際コード(海上安全委員会決議MSC61(67)」のパート2「煙と毒性試験」に従って実施した。
煙の発生試験は、ISO5659:1994のパート2に従って実施した。
毒性ガスの分析は、FTIR(フーリエ変換赤外分光法)を用いた。
試験体は、本発明の一実施形態において述べた有害ガス難発生敷物(吉田織物株式会社製造、品名:表面床張り材、型式:YFタイルW、寸法:縦横75mm)を用いた。
10 バッキング材層
20 表皮材層
21 一次基布
22 パイル
23 接着剤
30 接着材層
31 メッシュ地
32 スチレンブタジエンスチレンブロック共重合体組成物
Claims (3)
- 有害ガス難発生敷物(A)の一次基布(21)として用いられ、且つ一面側にアセチル基を有したエチレン・酢酸ビニル共重合体にポリホウ酸ナトリウムが混練されたEVA樹脂層が設けられた難燃性面状体において、該難燃性面状体がポリプロピレン不織布から可撓性面状本体を形成すると共に、前記EVA樹脂層には、該EVA樹脂量に対して2〜5%のデンプンが混合されてなることを特徴とする有害ガス難発生敷物用の難燃性面状体。
- 前記EVA樹脂には、水酸化アルミニウム又は水酸化マグネシウムが加えられてなることを特徴とする請求項1記載の有害ガス難発生敷物用の難燃性面状体。
- 前記EVA樹脂には、炭酸カルシウムが混合されてなることを特徴とする請求項1又は2記載の有害ガス難発生敷物用の難燃性面状体。
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JP2013243305A JP6634643B2 (ja) | 2012-11-08 | 2013-11-07 | 有害ガス難発生敷物用の難燃性面状体 |
AU2013314173A AU2013314173B2 (en) | 2012-11-08 | 2013-11-08 | Flame retardant planar element and floor covering hardly generating hazardous gas using the flame retardant planar element, and production method of the floor covering hardly generating hazardous gas |
CN201380003149.9A CN104080373B (zh) | 2012-11-08 | 2013-11-08 | 阻燃性面状体和使用了所述阻燃性面状体的不易产生有害气体的垫子以及该不易产生有害气体的垫子的制造方法 |
PCT/JP2013/080842 WO2014073710A1 (ja) | 2012-11-08 | 2013-11-08 | 難燃性面状体及び該難燃性面状体を用いた有害ガス難発生敷物並びに該有害ガス難発生敷物の製造方法 |
US14/345,916 US20140363611A1 (en) | 2012-11-08 | 2013-11-08 | Flame retardant planar element and floor covering hardly generating hazardous gas using the flame retardant planar element, and production method of the floor covering hardly generating hazardous gas |
KR1020147007587A KR101588217B1 (ko) | 2012-11-08 | 2013-11-08 | 난연성 면상체 및 상기 난연성 면상체를 사용한 유해가스가 발생하기 어려운 깔개 및 상기 유해가스가 발생하기 어려운 깔개의 제조방법 |
EP13836183.7A EP2754373B1 (en) | 2012-11-08 | 2013-11-08 | Flame-retardant planar body, carpeting resistant to generating hazardous gases that uses said flame-retardant planar body, and method for producing said carpeting resistant to generating hazardous gases |
NZ622429A NZ622429A (en) | 2012-11-08 | 2013-11-08 | Flame retardant planar element and floor covering hardly generating hazardous gas using the flame retardant planar element, and production method of the floor covering hardly generating hazardous gas |
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- 2013-11-07 JP JP2013243305A patent/JP6634643B2/ja active Active
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WO2014073226A1 (ja) | 2014-05-15 |
JP2014111371A (ja) | 2014-06-19 |
CN104080373A (zh) | 2014-10-01 |
CN104080373B (zh) | 2016-03-30 |
NZ622429A (en) | 2016-03-31 |
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