초록 ▼

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 fab

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 A

대표청구항 ▼

[ What is claimed is:] [1.] A non-woven composite fabric comprising:a polypropylene microporous thermoplastic film having at least one film surface thermally bonded by ultrasonic point bonding to a layer of non-woven thermoplastic materials, said film and layers being thermally bonded at multiple sp

[ What is claimed is:] [1.] A non-woven composite fabric comprising:a polypropylene microporous thermoplastic film having at least one film surface thermally bonded by ultrasonic point bonding to a layer of non-woven thermoplastic materials, said film and layers being thermally bonded at multiple spaced-apart locations;the composite fabric meeting the requirements of A[ ES21-92 by providing a barrier to passage of biological liquid when the composite fabric is subjected to contact with synthetic blood at zero psi for 5 minutes followed by synthetic blood contact at 2 psi (13.6 kpa) for one minute followed by synthetic blood contact at zero psi for fifty-four minutes, said composite fabric exhibiting no visible penetration of synthetic blood;]the composite fabric meeting the requirements of A[ ES22-92 by providing a barrier to viral penetration when the composite fabric is subject to contact with .phi.X174 bacteriophage suspension at a titer of 10.sup.8 PFU/mL for 5 minnutes with no applied pressure, 1 minute at 13.8 kPa (2.0 PSIG), and 54 minutes with no applied pressure; and]said non-woven composite fabric having a moisture or vapor transmission rate of greater than about 450 grams per square meter for twenty-four hours at about 75 degrees F and about 65% relative humidity.[ ES22-92 by providing a barrier to passage of biological liquid as defined when the composite fabric is subjected to contact with synthetic blood at zero psi for five synthetic blood contact for fifty-four minutes;][ ES22-92 by providing a barrier to viral penetration when the composite fabric is subject to contact with .phi.X174 bacteriophage suspension at a titer of 10.sup.8 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; and][ ES21-92 by providing a barrier to passage of biological liquid when the composite fabric is subjected to contact with synthetic blood at 0 psi for 5 minutes followed by synthetic blood contact at 2 psi (13.6 kpa) for 1 minute follwed by synthetic blood contact at 0 psi for 54 minutes, said composite fabric exhibiting no visible penetration of the synthetic blood; and said composite fabric having a breaking strength of at least 14 pounds per inch; the composite fabric meeting the requirements of A][ ES22-92 by providing a barrier to viral penetration when the composite fabric is subject to contact with .phi.X174 bacteriophage suspension at a titer of 10.sup.8 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; and comprising:]