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US 2004/0121678 A1Published application
Liquid impervious and pathogen impervious laminate having antistatic properties
OwnerA. Frank Baldwin JR., Jessica Z. Browninventors
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Abstract
The present invention provides a liquid impervious and pathogen impervious laminate comprising a breathable layer comprising an antistatic agent and a fibrous layer on the breathable layer. Preferably, the fibrous layer includes a thermally activated adhesive material that is used to bond the fibrous layer and the breathable layer together.
Claims112
A liquid impervious and pathogen impervious laminate comprising:
- a breathable layer comprising an antistatic agent;
- and
- a fibrous layer on the breathable layer.
A cloth laminate comprising:
- a breathable thermoplastic layer comprising an antistatic agent such that the laminate exhibits an electrostatic decay time of less than about 20 seconds;
- and
- a nonwoven fibrous layer bonded to the breathable thermoplastic layer, wherein the nonwoven fibrous layer has a surface energy of less than 75 dynes/cm.
A cloth laminate comprising:
- a breathable monolithic thermoplastic layer comprising an antistatic agent such that the laminate exhibits an electrostatic decay time of less than about 20 seconds;
- and
- a nonwoven thermoplastic fibrous layer bonded to the breathable monolithic thermoplastic layer, wherein the nonwoven thermoplastic fibrous layer has a surface energy of less than 50 dynes/cm.
A cloth laminate comprising:
- a breathable thermoplastic layer comprising an antistatic agent such that the laminate exhibits an electrostatic decay time of less than about 10 seconds at 50% relative humidity;
- and
- a nonwoven fibrous layer bonded to the breathable thermoplastic layer, wherein the nonwoven fibrous layer has a surface energy of less than 75 dynes/cm;
- wherein the laminate exhibits no visible penetration of synthetic blood when 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 54 minutes according to ASTM F1670.
1 more element
A cloth laminate comprising:
- a breathable thermoplastic layer comprising an antistatic agent such that the laminate exhibits an electrostatic decay time of less than about 20 seconds at 50% relative humidity;
- and
- a nonwoven fibrous layer bonded to the breathable thermoplastic layer, wherein the nonwoven fibrous layer has a surface energy of less than 75 dynes/cm;
- wherein the laminate exhibits no detectable virus penetration when tested per ASTM F-1671
1 more element
A layered structure comprising:
- a breathable layer comprising an antistatic agent;
- and
- one or more fibrous layers contacting the breathable layer, wherein at least one of the one or more fibrous layers comprise a thermally-activated adhesive material.
A nonwoven fabric composite comprising:
- a breathable film comprising an antistatic agent and a thermoplastic material;
- and
- a nonwoven fabric layer bonded to the breathable film, wherein the nonwoven fabric layer has a surface energy of less than 70 dynes/cm;
- wherein said composite exhibits an electrostatic decay time of less than about 20 seconds at 50% relative humidity;
- wherein said composite provides for a moisture vapor transmission rate of at least about 400 grams/sq. meter/24 hours at 72° F. and 50% relative humidity according to ASTM E96B;
- wherein said composite has a grab tensile strength in the machine direction of at least about 15 pounds;
- wherein said composite has a grab tensile strength in the cross-machine direction of at least about 10 pounds;
- wherein said composite has a thickness between about 10 and 50 mils;
- wherein said composite has a weight of from about 1 to 4 ounces per square yard;
- and
- wherein said composite exhibits no visible penetration of synthetic blood when subjected to contact with synthetic blood at zero psi for 5 minutes, followed by synthetic blood contact at 2 psi for one minute, followed by synthetic blood contact at zero psi for 54 minutes according to ASTM F1670.
8 more elements
A nonwoven fabric composite comprising:
- a breathable film comprising an antistatic agent and a thermoplastic material;
- and
- a nonwoven fabric layer bonded to the breathable film, wherein the nonwoven fabric layer has a surface energy of less than 70 dynes/cm;
- wherein said composite exhibits an electrostatic decay time of less than about 20 seconds at 50% relative humidity;
- wherein said composite provides for a moisture vapor transmission rate of at least about 400 grams/sq. meter/24 hours at 72° F. and 50% relative humidity according to ASTM E96B;
- wherein said composite has a grab tensile strength in the machine direction of at least about 15 pounds;
- wherein said composite has a grab tensile strength in the cross-machine direction of at least about 10 pounds;
- wherein said composite has a thickness between about 10 and 50 mils;
- wherein said composite has a weight of from about 1 to 4 ounces per square yard;
- and
- wherein the laminate exhibits no detectable virus penetration when tested per ASTM F-1671.
8 more elements
A garment for use in a medical environment, said garment comprising
- a nonwoven fabric composite that comprises:
- a breathable monolithic film comprising a copolyetherester and an antistatic agent;
- and
- a nonwoven fabric layer comprising a polyester, said nonwoven fabric layer bonded to the breathable monolithic film, wherein the nonwoven fabric layer has a surface energy of less than 70 dynes/cm;
- wherein said composite exhibits an electrostatic decay time of less than about 1 second at 50% relative humidity;
- wherein said composite provides for a moisture vapor transmission rate of at least about 400 grams/sq. meter/24 hours at 72° F. and 50% relative humidity according to ASTM E96B;
- wherein said composite has a grab tensile strength in the cross-machine direction of at least about 10 pounds;
- wherein said composite has a thickness between about 10 and 50 mils;
- wherein said composite has a weight of from about 1 to 4 ounces per square yard;
- and
- wherein said composite exhibits no visible penetration of synthetic blood when subjected to contact with synthetic blood at zero psi for 5 minutes, followed by synthetic blood contact at 2 psi for one minute, followed by synthetic blood contact at zero psi for 54 minutes according to ASTM F1670.
8 more elements
A garment for use in a medical environment, said garment comprising
- a nonwoven fabric composite that comprises:
- a breathable monolithic film comprising a copolyetherester and an antistatic agent;
- and
- a nonwoven fabric layer comprising a polyester, said nonwoven fabric layer bonded to the breathable monolithic film, wherein the nonwoven fabric layer has a surface energy of less than 70 dynes/cm;
- wherein said composite exhibits an electrostatic decay time of less than about 1 second at 50% relative humidity;
- wherein said composite provides for a moisture vapor transmission rate of at least about 400 grams/sq. meter/24 hours at 72° F. and 50% relative humidity according to ASTM E96B;
- wherein said composite has a grab tensile strength in the cross-machine direction of at least about 10 pounds;
- wherein said composite has a thickness between about 10 and 50 mils;
- wherein said composite has a weight of from about 1 to 4 ounces per square yard;
- and
- wherein the laminate exhibits no detectable virus penetration when tested per ASTM F-1671.
8 more elements
A method of manufacturing a cloth laminate comprising:
- heating a layered structure comprising a breathable layer, which comprises an antistatic agent, on a fibrous layer that comprises a thermally-activated adhesive material, such that the thermally-activated adhesive material in the fibrous layer melts and bonds the breathable layer to the fibrous layer to provide the cloth laminate.
A method of manufacturing a nonwoven fabric composite comprising:
- melting a thermally-activated adhesive material in a nonwoven fabric layer such that the melted adhesive material bonds the nonwoven fabric layer to a breathable film on the nonwoven fabric layer, wherein the breathable film comprises an antistatic agent.
A method of manufacturing a nonwoven fabric composite comprising:
- activating a thermally-activated adhesive material in a nonwoven fabric layer such that the activated adhesive material bonds the nonwoven fabric layer to a breathable film on the nonwoven fabric layer, wherein the breathable film comprises an antistatic agent.
Dependencies are inferred from the claim text.