JPWO2010140201A1 - 透湿防水性布帛およびその製造方法 - Google Patents
透湿防水性布帛およびその製造方法 Download PDFInfo
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- JPWO2010140201A1 JPWO2010140201A1 JP2009523093A JP2009523093A JPWO2010140201A1 JP WO2010140201 A1 JPWO2010140201 A1 JP WO2010140201A1 JP 2009523093 A JP2009523093 A JP 2009523093A JP 2009523093 A JP2009523093 A JP 2009523093A JP WO2010140201 A1 JPWO2010140201 A1 JP WO2010140201A1
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- urethane resin
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- moisture
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Abstract
Description
CF=T×(DT)1/2+W×(DW)1/2
式中、TおよびWは織物の経密度および緯密度(本/インチ)を示し、DTおよびDWは織物を構成する経糸および緯糸の太さ(dtex)を示す。
96.3±0.1質量%の試薬特級濃硫酸中に重合体の濃度が10mg/mlになるように試料を溶解させてサンプル溶液を調製した。20℃±0.05℃の温度で水落下秒数が6から7秒のオストワルド粘度計を用い、20℃±0.05℃の温度で、調製したサンプル溶液20mlの落下時間T1(秒)および試料を溶解するのに用いた96.3±0.1質量%の試薬特級濃硫酸20mlの落下時間T0(秒)を、それぞれ測定した。重合体の相対粘度(RV)は下記の式により算出した。
RV=T1/T0
総繊度(dtex)は、100m長の糸条のカセを3つ作製し、各々の質量(g)を精秤し、平均値を求め、100倍して求めた。
インストロンジャパン社製の4301型万能材料試験機を用い、試料長:20cm、引っ張り速度:20cm/分、糸繊度の1/33の荷重をかけ、測定を3回実施して、破断したときの強度の平均値を破断強度とした。
測定方法は上記破断強度と同様で、破断したときの伸度の平均値とした。
織物のカバーファクター(CF)は、下記式により計算した。
CF=T×(DT)1/2+W×(DW)1/2
式中、TおよびWは織物の経密度および緯密度(本/インチ)を示し、DTおよびDWは織物を構成する経糸および緯糸の太さ(dtex)を示す。
鋭利な安全カミソリを用い、定規を使って経糸の間を経糸に沿って刃を入れ、透湿防水性布帛の緯方向の断面を切出した。その後、SEMにて倍率500倍で断面写真を撮影した。写真は異なる場所から3枚任意に撮影した。各写真の親水性ウレタン樹脂層の厚みをモノサシで測定して、写真に付記した単位スケールから厚みを算出した。写真毎に最大値および最小値を測定して、その中央値のn=3の平均値を厚みとした。なお、比較例3では、多孔質ウレタン樹脂層の厚みを同様にして測定した。
前記中央値の平均値をaとし、前記最大値と中央値のそれぞれの平均値の差をbとし、バラツキcは下記式により計算した。
c=100×b/a
JIS L 1096 織物の厚さに準じて行った。その際の圧力は23.5kPaとし、10秒間加圧した時点での厚さとした。
JIS L 1096 8.15.5 D法(ペンジュラム法)に準じて行った。経および緯それぞれn=5の平均値とした。
JIS L 1096 8.19.1 A法(45°カンチレバー法)に準じて行った。経および緯それぞれn=5の平均値とした。
JIS L 1099 A−1法(塩化カルシウム法)に準じて行った。温度は40℃、湿度90%RHの環境で測定し、n=3の平均値とした。
JIS L 1092 B法(高水圧法)により測定した。
ナイロン6の56T24Fの平織物(経130本・緯116本/インチ)を染色・セットしたものをブランクとして、評価人を5人ランダムに選定し、柔らかく感じるものを5点、硬く感じるものを1点とし、5段階で評価した。
レザミンCU−4555(大日精化工業社製、ポリエステル型ポリウレタン樹脂を30質量%含むジメチルホルムアミド溶液):100質量部
レザミンX架橋剤(大日精化工業社製、イソシアネート架橋剤):2質量部
Nipsil E200(日本シリカ工業社製、含水タイプの親水性二酸化ケイ素微粉末:平均粒子径2.5μm):1質量部
ジメチルホルムアミド:30質量部
ハイムレンY−237NS(大日精化工業社製、ポリウレタン樹脂:不揮発分25質量%):100質量部
レザミンX−100(大日精化工業社製、イソシアネート化合物):2質量部
メチルエチルケトン:15質量部
トルエン:15質量部
水:40質量部
生地の経密度を240本/インチ、緯密度を220本/インチとし、織組織をリップストップにした以外は、実施例1と同様にして透湿防水性布帛を作製した。得られた透湿防水性布帛について実施例1と同様にして評価を行った。結果を表2に示す。
生地の経密度を181本/インチ、緯密度を134本/インチとし、織組織をリップストップにした以外は、実施例1と同様にして透湿防水性布帛を作製した。得られた透湿防水性布帛について実施例1と同様にして評価を行った。結果を表2に示す。
一般的な塗布条件で、処方1に示した第1ウレタン樹脂層用の樹脂液を、乾燥後の平均膜厚が25μmになるように塗布量を調整すると共に、また処方2の樹脂液を塗布せず、織組織をリップストップにした以外は、実施例1と同様にして透湿防水性布帛を作製した。得られた透湿防水性布帛について実施例1と同様にして評価を行った。結果を表2に示す。
第1ウレタン樹脂層用樹脂液の塗布を行わず、織組織をリップストップにした以外は、実施例1と同様にして透湿防水性布帛を作製した。得られた透湿防水性布帛について実施例1と同様にして評価を行った。結果を表2に示す。
ナイフと織物の間のクリアランスを調整することにより処方1に示した第1ウレタン樹脂層用の樹脂液を、乾燥後の平均膜厚が10μm程度になるように塗布量を調整すると共に、処方2に示した第2ウレタン樹脂層用の樹脂液を乾燥後の平均膜厚が3μm程度になるように塗布量を調整し、また、織組織をリップストップにした以外は、実施例1と同様にして透湿防水性布帛を作製した。得られた透湿防水性布帛は、多孔質の第1ウレタン樹脂層を無理やり10μmに塗布したためスジ等の塗工斑が生じて外観品質が悪い物であった。該透湿防水性布帛について実施例1と同様にして評価を行った。結果を表2に示す。
Claims (8)
- 2層のウレタン樹脂層が少なくとも織物の片面に積層されてなる布帛であって、
第1ウレタン樹脂層は、織物の表面において、織クリンプの凹部に目詰され且つ織クリンプの凸部のうち少なくとも一部は覆わないよう、不連続に積層された多孔質ウレタン樹脂層であり、
第2ウレタン樹脂層は、前記第1ウレタン樹脂層の上および織クリンプの凸部の上に、連続的に積層された親水性ウレタン樹脂層であることを特徴とする透湿防水性布帛。 - 前記第2ウレタン樹脂層の厚みが1〜30μmである請求項1に記載の透湿防水性布帛。
- 前記第2ウレタン樹脂層の厚みのバラツキが80%以下である請求項1又は2に記載の透湿防水性布帛。
- 前記織物は、相対粘度3.0以上のナイロン6および/又はナイロン66からなる総繊度8〜25dtexの糸条を用いたものであり、そのカバーファクター(CF)が1700〜2200であり、織組織が平織、リップストップ、またはダブルリップストップである請求項1〜3のいずれかに記載の透湿防水性布帛。
- 厚みが0.1mm以下であり、JIS L 1096 8.15.5 D法による引裂強力が経緯とも8.0N以上であり、JIS L 1096 8.19.1 A法による剛軟性が経緯とも5〜35mmである請求項1〜4のいずれかに記載の透湿防水性布帛。
- 前記引裂強力が経緯とも10.0N以上である請求項5に記載の透湿防水性布帛。
- JIS L 1099 A−1法による透湿性が4000mm/m2・24hr以上であり、JIS L 1092 B法による耐水圧が50kPa以上である請求項1〜6のいずれかに記載の透湿防水性布帛。
- 請求項1〜7のいずれかに記載の透湿防水性布帛を製造する方法であって、
(1)第1ウレタン樹脂層用の第1ウレタン樹脂液を、織クリンプの凹部に目詰させ且つ織クリンプの凸部のうち少なくとも一部は覆わないように織物の表面に塗布した後、湿式凝固法により第1ウレタン樹脂層を形成する工程、
(2)前記第1ウレタン樹脂層および織クリンプの凸部の上に、第2ウレタン樹脂層用の第2ウレタン樹脂液を連続的に塗布した後、乾式法により第2ウレタン樹脂層を形成する工程、を含むことを特徴とする透湿防水性布帛の製造方法。
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US9056962B2 (en) | 2012-10-05 | 2015-06-16 | S.C. Johnson & Son, Inc. | Composition for sealing a colorant to a surface, protecting a surface, and providing wear resistance to a surface |
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