发明名称 |
Breathable non-woven composite viral penetration barrier fabric and fabrication process |
摘要 |
A breathable non-woven fabric having barrier capabilities to biological liquids comprised of at least one non-woven layer bonded to at least one surface of a thermoplastic microporous film, the non-woven composite fabric providing a barrier to passage: (a) of biological liquid when the composite fabric is subjected to contact with synthetic blood under the dictates of testing procedure ASTM ES21-92; and (b) to viral penetration when the composite fabric is subject to contact with phi X174 bacteriophage suspension at a titer of 103 PFU/mL for 5 minutes with no applied pressure, 1 minute at 13.8 kPa (2.0 PSIG), and 54 minutes with no applied pressure while maintaining a moisture of vapor transmission rate of greater than about 450 grams per square meter for 24 hours at about 75 DEG F. and about 65% relative humidity, the non-woven composite fabric which has been thermally bonded by unwinding and contacting at least one continuous thermoplastic non-woven web to at least one side of a continuous thermoplastic microporous film, continuously transporting said contacted webs and film through a thermal bonding zone and thermally bonding the webs and film at multiple spaced-apart locations, said bonding having a dwell time sufficient to thermally bond said composite while avoiding burn-through degradation of the film and webs. |
申请公布号 |
US5728451(A) |
申请公布日期 |
1998.03.17 |
申请号 |
US19970824449 |
申请日期 |
1997.03.26 |
申请人 |
LANGLEY, JOHN D.;HINKLE, BARRY SCOTT |
发明人 |
LANGLEY, JOHN D.;HINKLE, BARRY SCOTT |
分类号 |
A41D31/00;A61B19/08;B29C65/00;B29C65/08;B32B27/12;B32B37/00;D04H13/00;(IPC1-7):B32B27/14 |
主分类号 |
A41D31/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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