JP4825419B2 - 低伸び布類を含む通気性ハウスラップ材料及びその製造方法 - Google Patents
低伸び布類を含む通気性ハウスラップ材料及びその製造方法 Download PDFInfo
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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Description
本発明によれば、少なくとも1方向にASTM D5034に従って測定した30%未満の伸びを示す低伸び布層とその上に設けられた微多孔質コーティング層とを含む通気性ハウスラップ材料であって、(1)該低伸び布層が、ポリオレフィン直交積層オープンメッシュ、スパンボンド法ポリオレフィンおよびフラッシュスパン法高密度ポリエチレンからなる群より選ばれる少なくとも一つの不織布層であり、(2)該微多孔質コーティング層が、50重量%以上の高密度ポリエチレンを含む結晶性ポリマー組成物及びフィラーを含有し、(3)該微多孔質コーティング層の設けられた低伸び布層が、5%未満の永久伸びまで増分延伸されており、かつ、(4)該通気性ハウスラップ材料のASTM E−96Eに従って測定した透湿度が150g/m 2 ・24hrより大きい、
ことを特徴とする通気性ハウスラップ材料が提供される。
一つの実施態様では、本発明は、通気性ハウスラップ材料に関する。該通気性ハウスラップ材料は、低伸び布層(a low-elongation fabric layer)と、その上に形成された微多孔質コーティング層とを含む。該微多孔質コーティング層は、結晶性ポリマー組成物及びフィラーを含有する。
この実施例では、本発明の通気性ハウスラップ材料が製造される。具体的には、密度が約0.945g/ccより大きい高密度ポリエチレンからなるコーティング層の一面を、ポリエチレン直交積層オープンメッシュからなる不織布層に押出積層する。使用する不織布層は、前記CLAF(登録商標)からなる不織布層で、その坪量は約31g/m2(0.91oz/yd2)である。このCLAF(登録商標)不織布層の伸びは、機械方向及び横方向の両方向において約20%である。コーティング層の他面を、坪量が約34g/m2(1oz/yd2)で約2デニールのスパンボンド法ポリエチレン不織布層に押出積層する。コーティング層の坪量は30g/m2である。係合深さが約0.38mm(15ミル)のCD噛み合い延伸及び係合深さが約0.76mm(30ミル)のMD噛み合い延伸を利用して、得られた材料を延伸し、高密度ポリエチレン押出コーティング層を微多孔質化して、通気性ハウスラップ材料を得る。この通気性ハウスラップ材料は、液体不透過性で、透湿度は約150g/m2・24hrより大きい。0.621MPa(90psi)の圧力で試験サンプルの片側に空気を与えた状態でサンプルに流れる空気の容積流量を測定する方法によって、該材料の通気度を測定する。測定した通気度は、83ml/min/cm2である。
本実施例は、多層微多孔質コーティング層を有する本発明の通気性ハウスラップ材料に関する。78g/m2(2.3oz/yd2)の低伸びスパンボンド法ポリプロピレン(SBPP)不織布層に三層(ABA)からなる36g/m2のコーティング層を押出積層する。各A層は、45%のポリプロピレン、50%の炭酸カルシウム、及び5%の低密度ポリエチレン(LDPE)からなる組成物から形成した9g/m2の層である。芯のB層は、53%の炭酸カルシウム、41%の高密度ポリエチレン、4%の二酸化チタン、1%のCaOマスターバッチ、及び1%の成形助剤からなる18g/m2の層である。積層体を加熱されていない金属ロールに送り、60.96m/min(200fpm)で処理した後、直ちに噛み合い延伸する。MD噛み合係合深さは1.016mm(40ミル)である。このサンプルについては、CD延伸は行わない。実施例1と同様な方法で測定した通気度は、41cc/min/cm2である。
Claims (9)
- 少なくとも1方向にASTM D5034に従って測定した30%未満の伸びを示す低伸び布層とその上に設けられた微多孔質コーティング層とを含む通気性ハウスラップ材料であって、(1)該低伸び布層が、ポリオレフィン直交積層オープンメッシュ、スパンボンド法ポリオレフィンおよびフラッシュスパン法高密度ポリエチレンからなる群より選ばれる少なくとも一つの不織布層であり、(2)該微多孔質コーティング層が、50重量%以上の高密度ポリエチレンを含む結晶性ポリマー組成物及びフィラーを含有し、(3)該微多孔質コーティング層の設けられた低伸び布層が、5%未満の永久伸びまで増分延伸されており、かつ、(4)該通気性ハウスラップ材料のASTM E−96Eに従って測定した透湿度が150g/m 2 ・24hrより大きい、
ことを特徴とする通気性ハウスラップ材料。 - 該低伸び不織布層が、24g/m2(0.7oz/yd2)より大きい坪量をもつポリエチレン直交積層オープンメッシュからなるものである請求項1記載の通気性ハウスラップ材料。
- 該フィラーが、炭酸カルシウムを含有する請求項1記載の通気性ハウスラップ材料。
- 該微多孔質コーティング層が、単独層からなるものである請求項1記載の通気性ハウスラップ材料。
- 該微多孔質コーティング層が、2以上の層からなるものである請求項1記載の通気性ハウスラップ材料。
- さらに第二の布層を有しており、該コーティング層が低伸び布層と第二の布層との間に配置されている請求項1記載の通気性ハウスラップ材料。
- 請求項1記載の通気性ハウスラップ材料の製造方法であって、少なくとも1方向にASTM D5034に従って測定した30%未満の伸びを示す低伸び布層に、結晶性ポリマー組成物及びフィラーを含有する組成物を押出コーティングして、該低伸び布層上にコーティング層を成形し、そして、コーティング処理した低伸び布層を増分延伸して、コーティング層を微多孔質化する通気性ハウスラップ材料の製造方法において、(1)該低伸び布層が、ポリオレフィン直交積層オープンメッシュ、スパンボンド法ポリオレフィンおよびフラッシュスパン法高密度ポリエチレンからなる群より選ばれる少なくとも一つの不織布層であり、(2)該微多孔質コーティング層が、50重量%以上の高密度ポリエチレンを含む結晶性ポリマー組成物及びフィラーを含有し、(3)該微多孔質コーティング層でコーティングされた低伸び布層が、5%未満の永久伸びまで増分延伸されており、かつ、(4)該通気性ハウスラップ材料のASTM E−96Eに従って測定した透湿度が、150g/m 2 ・24hrより大きい、
ことを特徴とする通気性ハウスラップ材料の製造方法。 - 該微多孔質コーティング層でコーティングされた低伸び布層を機械方向に増分延伸する請求項7記載の製造方法。
- 該微多孔質コーティング層でコーティングされた低伸び布層を2%未満の伸びに増分延伸する請求項7記載の製造方法。
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PCT/US2003/022642 WO2004011251A1 (en) | 2002-07-26 | 2003-07-18 | Breathable materials comprising low-elongation fabrics, and methods of making |
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BR0312976B1 (pt) | 2014-02-25 |
MXPA05001085A (es) | 2005-04-28 |
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TWI330587B (en) | 2010-09-21 |
EP1534514B1 (en) | 2013-04-03 |
AU2003254035B2 (en) | 2008-12-04 |
RU2005105324A (ru) | 2005-07-20 |
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US7772137B2 (en) | 2010-08-10 |
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EP1534514A1 (en) | 2005-06-01 |
TW200401705A (en) | 2004-02-01 |
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