JPWO2014061182A1 - 透湿性防水シートおよびその製造方法 - Google Patents
透湿性防水シートおよびその製造方法 Download PDFInfo
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Abstract
Description
本発明の実施の形態に係る透湿性防水シートは、表面が開放された多孔質膜(以下、「開放された多孔質膜」、あるいは単に「多孔質膜」ということもある)の少なくとも片面上および/または当該多孔質膜中に、ポリウレタンを含む多孔質層(以下、単に「多孔質層」ともいう)が形成されたものである。さらに、本実施の形態における透湿性防水シートは、通気度が0.005cm3/cm2・s以上、1cm3/cm2・s以下であり、10回洗濯処理後の耐水圧保持率が10%以上であることが好ましい。
塩化カルシウム法による透湿度は、JIS L1099−1993A−1法にて測定した。また、酢酸カリウム法による透湿度は、JIS L1099−1993B−1法にて測定した。
耐水圧は、JIS L1092−1998耐水度試験(静水圧法)A法(低水圧法)およびB法(高水圧法)に準じた方法で測定した。なお、単位は、低水圧法、高水圧法とも比較しやすいように、低水圧法の単位に換算した。
耐水圧保持率は、洗濯処理を10回行った後の耐水圧を、洗濯処理前(初期)の耐水圧で除したものの百分率であり、下記式で求めた。
通気度は、JIS L1096 A法(フラジール形法)に準じて測定を行った。
風合いは、手でさわって判断を行った。
本実施例では、保温性を表す指標として温度上昇差を求めた。温度上昇差は、パナソニック(株)製写真用レフランプのデイライトカラ−用PRF−500WB/Dから15cmの距離に2枚の試験片(実施例3の透湿性防水シートと、実施例3において赤外線吸収剤を添加しなかった以外は同一の方法で製造した透湿性防水シート(比較試料))を設置して多孔質層面に光を照射し、非接触型温度計(EMISSION THERMOMETER MODEL 530 04:横河製作所製)を用いて、比較試料の多孔質層面の温度が40℃になった時の実施例3の透湿性防水シートの多孔質層面の温度を測定して下記式により温度上昇差を求めた。
実施例1では、開放された多孔質膜として、PTFE膜(日本ドナルドソン(株)製、TX2201)を用いた。
・W/O型エマルジョンのポリウレタン乳濁液(XOLTEX PX550(DIC(株)製)、固形分29〜33%。溶剤:MEK:水=95:5) 100部
・配合有機溶剤(MEK/TOL(1:1)) 60部
・フッ素系撥水剤(ASSISTOR SD27M(DIC(株)製)) 1部
・水/MEK(9:1) 75部
・顔料(DILAC Black HS9530(DIC(株)製)) 5部
実施例1と同様に製造した、離型紙、多孔質層、PTFE膜の順番に積層されたものを24時間放置し、グラビアコータを用いてPTFE膜の上に下記の接着剤樹脂溶液を点状に塗布し、120℃で乾燥した。
・2液型ポリウレタン樹脂(HI−MUREN Y134−45(大日精化工業(株)製)、固形分60%) 100部
・トルエン 30部
・MEK 40部
・イソシアネート(コロネートHL(日本ポリウレタン工業(株)製)) 9部
・アミン系触媒(HI−299(大日精化工業(株))) 0.5部
多孔質層を設けなかった以外は、実施例2と同様の方法によって透湿性防水シートを得た。
実施例3でも、開放された多孔質膜として、PTFE膜(日本ドナルドソン(株)、TX2201)を用いた。
・W/O型エマルジョンのポリウレタン乳濁液(XOLTEX PX550(DIC(株)製)、固形分29〜33%。溶剤:MEK:水=95:5) 100質量部
・MEK/TOL(1:1)の配合有機溶剤 60質量部
・イソシアネート系架橋剤(XOLTEX CL−15(DIC(株)製)) 3質量部
・水/MEK(9:1) 60質量部
・赤外線吸収剤(セルナックスCXZ330H(日産化学工業(株)製)) 5質量部
・フッ素系撥水剤(アサヒガードAG−E061(旭硝子(株)製)、固形分20%) 5.0質量%
・イソシアネート系架橋剤(アクアネート100(日本ポリウレタン工業(株)製)、固形分100%) 0.2質量%
・水 94.8質量%
多孔質層を設けなかった以外は、実施例3と同様の方法によって透湿性防水シートを得た。
実施例1で用いたW/O型エマルジョン樹脂のポリウレタン乳濁液を、XOLTEX PX550からHI−MUREN X−3040(エーテル系ポリウレタン。大日精化工業(株)製、固形分30%。溶剤:MEK:水=94:6)に代えるとともに、実施例1で用いた顔料を、DILAC Black HS9530(DIC(株)製)からDILAC White HS9530(DIC(株)製)に代えた以外は、実施例1と同様の方法によってPTFE膜上に白色の多孔質層を形成した。
ポリウレタン溶液からフッ素系撥水剤(ASSISTOR SD27M)を除いた以外は、実施例4と同様の方法によって透湿性防水シートを得た。
Claims (8)
- 表面が開放された複数の孔を有する多孔質膜の少なくとも片面上および/または当該多孔質膜中に、ポリウレタンを含む多孔質層が形成されていることを特徴とする透湿性防水シート。
- 通気度が0.005cm3/cm2・s以上、1cm3/cm2・s以下であることを特徴とする請求項1に記載の透湿性防水シート。
- 10回洗濯処理後の耐水圧が5000mm以上であることを特徴とする請求項1または2に記載の透湿性防水シート。
- 前記多孔質膜が、多孔質ポリテトラフルオロエチレン膜であることを特徴とする請求項1〜3のいずれか1項に記載の透湿性防水シート。
- 前記多孔質層の表面に撥水剤が付着されていることを特徴とする請求項1〜4のいずれか1項に記載の透湿性防水シート。
- 表面が開放された複数の孔を有する多孔質膜とポリウレタン溶液とを積層することを特徴とする透湿性防水シートの製造方法。
- 前記多孔質膜は、多孔質ポリテトラフルオロエチレン膜であることを特徴とする請求項6に記載の透湿性防水シートの製造方法。
- 前記ポリウレタン溶液は、W/O型エマルジョンのポリウレタン乳濁液であることを特徴とする請求項6または7に記載の透湿性防水シートの製造方法。
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JPH01291927A (ja) * | 1988-05-19 | 1989-11-24 | Nippon Orimono Kako Kk | 透湿性防水加工布 |
JP2003326661A (ja) * | 2002-05-16 | 2003-11-19 | Komatsu Seiren Co Ltd | 透湿性防水シート及びその製造方法 |
JP2007512987A (ja) * | 2003-12-03 | 2007-05-24 | ゴア エンタープライズ ホールディングス,インコーポレイティド | 新規ポリマーフィルム及びこのポリマーフィルムを含むテキスタイルラミネート |
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JPS6414675A (en) * | 1987-07-08 | 1989-01-18 | Sharp Kk | Image synthesizing layout device |
JPH01291927A (ja) * | 1988-05-19 | 1989-11-24 | Nippon Orimono Kako Kk | 透湿性防水加工布 |
JP2003326661A (ja) * | 2002-05-16 | 2003-11-19 | Komatsu Seiren Co Ltd | 透湿性防水シート及びその製造方法 |
JP2007512987A (ja) * | 2003-12-03 | 2007-05-24 | ゴア エンタープライズ ホールディングス,インコーポレイティド | 新規ポリマーフィルム及びこのポリマーフィルムを含むテキスタイルラミネート |
WO2008090877A1 (ja) * | 2007-01-24 | 2008-07-31 | Komatsu Seiren Co., Ltd. | 透湿性防水シート及びその製造方法 |
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