JP6799966B2 - 布帛及びその製造方法 - Google Patents
布帛及びその製造方法 Download PDFInfo
- Publication number
- JP6799966B2 JP6799966B2 JP2016162875A JP2016162875A JP6799966B2 JP 6799966 B2 JP6799966 B2 JP 6799966B2 JP 2016162875 A JP2016162875 A JP 2016162875A JP 2016162875 A JP2016162875 A JP 2016162875A JP 6799966 B2 JP6799966 B2 JP 6799966B2
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- JP
- Japan
- Prior art keywords
- coating layer
- fabric
- flame retardant
- fluorine
- repellent
- 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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- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
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- PTMHPRAIXMAOOB-UHFFFAOYSA-N phosphoramidic acid Chemical compound NP(O)(O)=O PTMHPRAIXMAOOB-UHFFFAOYSA-N 0.000 description 1
- 150000003012 phosphoric acid amides Chemical class 0.000 description 1
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- XFZRQAZGUOTJCS-UHFFFAOYSA-N phosphoric acid;1,3,5-triazine-2,4,6-triamine Chemical compound OP(O)(O)=O.NC1=NC(N)=NC(N)=N1 XFZRQAZGUOTJCS-UHFFFAOYSA-N 0.000 description 1
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Description
特に、自動車等の乗り物は、夏期の日光に長時間さらされた場合、車内の温度が80℃程度まで上昇することがあるが、フッ素系撥水撥油剤の効果として80℃付近の液体に対しては撥水撥油性が低下しやすいため、このような高温下で高い防汚性を維持することは難しいという問題がある。
フッ素系撥水撥油剤が含浸されたポリエステル系布帛の一方の面に、第一コーティング層と第二コーティング層を有していること、
前記第一コーティング層がフッ素系撥水撥油剤を含む層であり、前記第二コーティング層が難燃剤を含む層であること、
布帛側が第一コーティング層であり、第一コーティング層における布帛と反対側が第二コーティング層であることを特徴とする。
これに対し、本発明では、布帛の一方の面(特に、布帛の裏面)に、撥水撥油コーティング層と難燃コーティング層を、布帛側から、撥水撥油コーティング層、難燃コーティング層の順に設けることにより、優れた防汚性と難燃性を両立することに成功した。
ポリエステル系布帛を、フッ素系撥水撥油剤を含む処理液に浸漬して処理液を含ませた後、当該布帛を乾燥する工程、
前記布帛の一方の面に、フッ素系撥水撥油剤を含む第一コーティング層を形成する工程、
前記第一コーティング層の上に、難燃剤を含む第二コーティング層を形成する工程
を含む、布帛の製造方法に関する。
また、難燃コーティング組成物にフッ素系撥水撥油剤を添加して、難燃・防汚コーティング層を形成すると、難燃剤単独使用の場合と比べて防汚性は改善されるものの、安定した防汚性を達成することは依然として難しく、また、布帛のコーティング面側にスラブウレタン等の発泡材シートを固着した際に、布帛と発泡材シートが剥離しやすいという問題がある。
これに対し、本発明では、布帛の一方の面に、フッ素系撥水撥油剤を含む第一コーティング層を形成し、その上に難燃剤を含む第二コーティング層を形成することにより、防汚性と難燃性の両方に優れ、さらに発泡材シートとの剥離強度が高い布帛を提供することが可能である。なお、難燃コーティング層、撥水撥油コーティング層を逆にして、布帛、難燃コーティング層、撥水撥油コーティング層の順に積層した場合は、所望の防汚性が得られないだけでなく、発泡材シートとの剥離強度が低下する。
またさらに、実施例の項に記載の方法で発泡材シートを布帛片面(コーティング層を有する面)に融着ラミネートした際、実施例の項に記載の剥離強度試験において1.0N/cm以上の剥離強度を達成できることが好ましい。
以下、本発明の構成について、より具体的に説明する。
本発明において、ポリエステル系布帛とは、ポリエステル繊維を含む布帛を意味し、ポリエステル繊維単独からなる織物、編物、不織布だけでなく、ポリエステル繊維と他の繊維(木綿、羊毛等の天然繊維やポリアミド、レーヨン、アクリル等の化学繊維)を組み合わせて使用した交織品、交編品等のいずれであってもよい。布帛の構成繊維に占めるポリエステル繊維の割合は、60重量%以上が好ましく、70重量%以上がより好ましく、80重量%以上が特に好ましく、90重量%以上がさらに好ましい。特に好ましい布帛は、ポリエステル繊維からなる厚み0.2〜3.0mm(目付100〜700g/m2)、特に厚み0.4〜2.6mm(目付200〜500g/m2)の布帛である。
浸漬処理に使用されるフッ素系撥水撥油剤は1種類でもよく、複数(例えば2〜3種類)であってもよい。
ポリエステル系布帛にフッ素系撥水撥油剤を含浸させる方法として、一般に、パディング処理又はディップ・ニップ処理と呼ばれる浸漬処理を使用することができる。例えば、フッ素系撥水撥油剤(固形分)を1.0〜5.0重量%、より好ましくは1.5〜3.5重量%含有する水性処理液を調製し、前記ポリエステル系布帛を当該処理液に浸漬し(例えば、2〜5分)、ローラー(マングル)等で絞ることにより、処理液を布帛全体に含ませることができ、その後乾燥させることにより、フッ素系撥水撥油剤が含浸された布帛を得ることができる。適切な乾燥条件は、例えば110〜170℃、特に120〜160℃で1〜5分程度である。
この防汚加工により布帛に含浸されるフッ素系撥水撥油剤の量は、処理液中のフッ素系撥水撥油剤の濃度と絞り率から計算できる。乾燥処理後の布帛に含まれる、フッ素系撥水撥油剤の含浸量は、布帛の単位面積当たり、2.0g/m2〜8.0g/m2が適切であり、3.0g/m2〜7.0g/m2がより好ましく、4.0g/m2〜6.5g/m2が特に好ましい。
防汚加工後の洗浄工程で還元洗浄と温水洗浄のどちらを選択するかは、布帛の色移りのしやすさを目安に判断できる(高い染料濃度で染色された布帛は色移りしやすく、低い染料濃度で染色された布帛は色移りしにくい)。高い染料濃度で染色された布帛の例として、黒、青、赤、紫、ダークグレー、濃紺、濃緑等の約5%owf以上の染料濃度で染色された布帛が挙げられ、低い染料濃度で染色された布帛の例として、白、ライトグレー、ベージュ、クリーム等の約5%owf未満の染料濃度で染色された布帛が挙げられる。より具体的には、防汚加工後の布帛が、乾燥・湿潤試験の両方で摩擦堅牢度が4.0級以上である場合は還元洗浄は必要無いと判断でき、4.0級未満である場合、還元洗浄が必要と判断できる。摩擦堅牢度の測定は、JIS L0849(摩擦に対する染色堅ろう度試験方法)に準じる。
第一コーティング層を形成するための組成物は、フッ素系撥水撥油剤を1.5〜9.0重量%、より好ましくは2.0〜7.0重量%、特に好ましくは2.5〜6.0重量%(いずれもコーティング用組成物の固形分重量の合計に対する、フッ素系撥水撥油剤の固形分重量の割合)で含むことが好ましい。
他方、第二コーティング層に撥水撥油剤を添加すると、布帛に発泡材シートを固着した際の、布帛と発泡材シートの剥離強度が低下するため、第二コーティング層は撥水撥油剤を実質的に含まないほうがよい(第二コーティング層に含まれる撥水撥油剤の含有量が、布帛の単位面積当たり、0.1g/m2未満であることが好ましく、0g/m2であることがより好ましい)。
さらに、第一コーティング層に含まれる難燃剤の量が多すぎると、防汚効果が低下する傾向があるため、第一コーティング層に含まれる難燃剤の量は、布帛の単位面積当たり、45g/m2以下、特に40g/m2以下とすることが好ましい。
特に、各バインダーはソフトなタイプが良く、アクリル系樹脂では、Tg=−30℃〜−45℃のものが良く、ウレタン系樹脂では、最低造膜温度(MFT)が0℃〜5℃のものが良い。
バインダーの量が少なすぎる場合は、フッ素系撥水撥油剤・難燃剤を布帛に十分に固定することが難しくなり、量が多すぎる場合は、風合が硬くなる可能性がある。
なお、前述のように、第一コーティング層に難燃剤を添加する場合は、第二コーティング層の量を減らせるため、例えば、第一コーティング層の量を40〜85g/m2、好ましくは50〜70g/m2とし、第二コーティング層の量を25〜50g/m2、好ましくは30〜45g/m2とすることができる。
また、染色と難燃を同じ浴中で行ってもよい。その他、染色時に高い染料濃度(約5%owf以上)で布帛を染色した場合は、染色後に還元洗浄を行ってもよい。
ポリエステル布帛(ポリエステル100%:目付け360g/m2)を、表1に示す工程で処理した。
表1の工程において、染色処理時(工程1)には、黒色又はベージュ色の分散染料とともに、大京化学株式会社からビゴールFV−6010の商品名で販売されているリン酸アミド系難燃剤を0.84%owf(固形分換算)添加して、染色と同時に浴中難燃加工を行った。なお、黒色は染料濃度約9.8%owf、ベージュ色は染料濃度約0.25%owf(いずれも固形分換算)となるように各染料を使用した。
また、dip−nipによる防汚加工(工程4)には、旭硝子株式会社からアサヒガードEシリーズの名称で販売されているフッ素系撥水撥油剤及び日華化学株式会社からNKガードSの名称で販売されているフッ素系撥水撥油剤の混合物を使用し、フッ素系撥水撥油剤を2.44重量%(固形分換算)含む水分散液に、ポリエステル布帛を浸漬し(150℃・2分30秒)、次いで、マングルで3.0kgf/cm2の圧力で絞った(pic−up率60%)。
また、第一コーティングで使用したフッ素系撥水撥油剤(工程8及び10)は、日華化学株式会社からNKガードSの名称で販売されているフッ素系撥水撥油剤であり、工程8で使用したアクリル系樹脂は、DIC株式会社からボンコート901の名称で販売されているアクリル系樹脂含有水分散体であり、ウレタン系樹脂は第一工業製薬株式会社からスーパーフレックスE−2000の名称で販売されているウレタン系樹脂含有水分散体であり、ポリエステル系樹脂は互応化学工業株式会社からプラスコートZの名称で販売されているポリエステル系樹脂含有水分散体である。
また、工程8では、新中村化学工業株式会社からバナゾールKB−660の名称で使用されているアクリル樹脂系増粘剤を使用した。
JIS L0849(摩擦に対する染色堅ろう度試験方法)に準じて、各加工布帛について、乾燥試験(DRY)と湿潤試験(WET)を行った。汚染の判定は、汚染用グレースケール(JIS L0805)を用いて、1〜5級の判定を行った。4級以上を合格と判定とする。
米国連邦自動車安全基準(FMVSS:Federal Motor-Vehicle Safety Standard)に定められている「内装材料の燃焼性」に準じて試験を行い、難燃性能を判定した。
布帛(加工布帛単独又はラミネート複合体)に炎を15秒間あてても着火しなかった場合(N)又は、布帛に炎をあてると着火したが、炎がA標線を越えた後、燃焼距離101mm以内、燃焼時間60秒以内で消火した場合(101mm/分以下)を合格とする。
試験片として、各試料(加工布帛)から約10×10cm角サイズを1枚準備し試験する。トレーにソフトワイプ(エリエール プロワイプ)を敷き、試験片を載せ(コーティングした場合は、コーティング面(裏面)を下にして、ソフトワイプ上に載せる)、試験試料上にスポイトでサラダ油を直径約5mm又は0.05mlで5か所に滴下する。
ギアオーブン83℃の中にトレーを入れ、24時間静置する。24時間後トレーを取り出し、試験片表面においてサラダ油滴下個所が湿潤していないか(油シミが生じていないか)、また、裏面とソフトワイプにサラダ油の油シミがないか観察する。試験試料の表面と裏面、及び下に敷いていたソフトワイプに油ジミがないものを合格とする。
JIS L1092 6.2で定められている装置に、20cm×20cmの大きさにカットした試験片を試験片保持枠にしわが生じないように取り付ける。
蒸留水又はイオン交換水250mlを漏斗に入れ、試験片上へ散布する。
次に試験片を保持枠ごと台上から取り外し、その一遍で水平に持ち、試験片の表側を下向きにして他端を固い物に一度軽く当て、更に180°回し、前と同様に操作して余分な水滴を落とす。
保持枠を取り付けたまま試験片の濡れた状態を採点する。
0点 :表面及び裏面が全体に湿潤を示すもの
50点:表面全体に湿潤を示すもの
70点:表面の半分に湿潤を示し、小さな個々の湿潤が布を浸透する状態を示すもの
80点:表面に小さな個々の水滴状の湿潤を示すもの
90点:表面に湿潤しないが、小さな水滴の付着を示すもの
95点:表面に湿潤が無く、小さな水滴がわずかに付着を示すもの
100点:表面に湿潤や水滴の付着が無いもの
初期95点以上を合格とする。
ウレタンフォームをラミネートされた加工布帛から試験片として、幅25mm、長さ150mmのサイズの試験片を、両端中央より、たて、よこより各々3ヶずつ切り出し、試験片の長手方向の端部において、布帛とウレタンフォームを約50mm手で剥いでおく。これを引っ張り速度200mm/minで引っ張り、剥離荷重を記録する。
記録された荷重からチャートより平均荷重を求め、3ヶ所の平均を各方向について求め、 剥離強度(N/cm)を算出する。剥離強度1N/cm以上を合格とする。
また、No.5〜No.10の布帛について、第一コーティング層と第二コーティング層の順序を入れ替えて、布帛、難燃コーティング層、防汚コーティング層の順に積層すると、布帛の防汚試験で油シミが発生し、さらに、ラミ剥離強度が不十分となったため、布帛、防汚コーティング層、難燃コーティング層の順に積層することが必須であった。
2 第一コーティング層
3 第二コーティング層
4 発泡材シート
Claims (9)
- 布帛であって、
フッ素系撥水撥油剤が含浸されたポリエステル系布帛の一方の面に、第一コーティング層と第二コーティング層を有していること、
前記第一コーティング層がフッ素系撥水撥油剤を含む層であり、前記第二コーティング層が難燃剤を含む層であること、
布帛側が第一コーティング層であり、第一コーティング層における布帛と反対側が第二コーティング層であること、
前記布帛の前記一方の面に、さらに発泡材シートが固着していること
を特徴とする布帛。 - 布帛であって、
フッ素系撥水撥油剤が含浸されたポリエステル系布帛の一方の面に、第一コーティング層と第二コーティング層を有していること、
前記第一コーティング層がフッ素系撥水撥油剤を含む層であり、前記第二コーティング層が難燃剤を含む層であること、
布帛側が第一コーティング層であり、第一コーティング層における布帛と反対側が第二コーティング層であること、
前記第一コーティング層に含まれるフッ素系撥水撥油剤の布帛の単位面積当たりの含有量が、0.5〜5.0g/m2であること
を特徴とする布帛。 - 布帛であって、
フッ素系撥水撥油剤が含浸されたポリエステル系布帛の一方の面に、第一コーティング層と第二コーティング層を有していること、
前記第一コーティング層がフッ素系撥水撥油剤及び難燃剤を含む層であり、前記第二コーティング層が難燃剤を含む層であること、
布帛側が第一コーティング層であり、第一コーティング層における布帛と反対側が第二コーティング層であること
を特徴とする布帛。 - さらに、前記布帛の前記一方の面に、発泡材シートが固着している、請求項2又は3に記載の布帛。
- 前記第一コーティング層に含まれるフッ素系撥水撥油剤の布帛の単位面積当たりの含有量が、0.5〜5.0g/m 2 である、請求項1,3,4のいずれか1項に記載の布帛。
- 前記第一コーティング層に含まれるフッ素系撥水撥油剤及び難燃剤の、布帛の単位面積当たりの含有量が、それぞれ0.5〜3.0g/m 2 及び0g/m 2 であり、
前記第二コーティング層に含まれる難燃剤の布帛の単位面積当たりの含有量が、30〜60g/m 2 である、請求項1又は2に記載の布帛。 - 前記第一コーティング層に含まれるフッ素系撥水撥油剤及び難燃剤の、布帛の単位面積当たりの含有量が、それぞれ2.5〜5.0g/m 2 及び25〜45g/m 2 であり、
前記第二コーティング層に含まれる難燃剤の布帛の単位面積当たりの含有量が、15〜35g/m 2 であり、
第一コーティング層に含まれる難燃剤の含有量が、第二コーティング層に含まれる難燃剤の含有量より多い、請求項1〜5のいずれか1項に記載の布帛。 - 前記布帛の前記一方の面が、布帛の裏面である、請求項1〜7のいずれか1項に記載の布帛。
- 請求項1〜8のいずれか1項に記載の布帛であって、難燃性及び防汚性を備えている布帛。
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