Breathable blood and viral barrier fabric
First Claim
Patent Images
1. A composite fabric comprising:
- a nonwoven fabric substrate having first and second opposite surfaces;
a first microporous resin layer on said first surface of said nonwoven fabric substrate; and
a second microporous resin layer on said second surface of said nonwoven fabric;
wherein said first and second microporous resin layers fail the ASTM F1671 viral barrier test when tested as individual layers, but wherein the composite fabric passes the ASTM F1671 viral barrier test.
2 Assignments
0 Petitions
Accused Products
Abstract
The composite fabric of the invention provides a barrier to blood and viral challenges, and also provides breathability for comfort. The fabric is particularly suited for use as a disposable surgical gown. The fabric comprises a nonwoven fabric substrate with a first microporous resin layer on one surface and a second microporous resin layer on the opposite surface.
-
Citations
37 Claims
-
1. A composite fabric comprising:
- a nonwoven fabric substrate having first and second opposite surfaces;
a first microporous resin layer on said first surface of said nonwoven fabric substrate; and
a second microporous resin layer on said second surface of said nonwoven fabric;
wherein said first and second microporous resin layers fail the ASTM F1671 viral barrier test when tested as individual layers, but wherein the composite fabric passes the ASTM F1671 viral barrier test. - View Dependent Claims (2, 3, 4, 5, 21, 22, 23)
- a nonwoven fabric substrate having first and second opposite surfaces;
-
6. A composite fabric comprising:
-
a nonwoven fabric substrate having first and second opposite surfaces;
a first microporous coating comprising a microporous formable resin that has been extrusion coated onto said first surface of said nonwoven fabric substrate and subsequently stretched to impart microporosity, and a second microporous coating comprising a microporous formable resin that has been extrusion coated onto said second surface of said nonwoven fabric substrate and subsequently stretched to impart microporosity. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
24. A method of making a composite fabric comprising:
- providing a nonwoven fabric substrate having first and second opposite surfaces;
applying a first a microporous resin layer to the first surface of said nonwoven fabric substrate;
applying a second microporous resin layer to the second surface of said nonwoven fabric substrate; and
wherein said first and second microporous layers fail the ASTM F1671 viral barrier test when tested as individual layers, but wherein the composite fabric passes the ASTM F1671 viral barrier test. - View Dependent Claims (25, 26, 27, 28, 29)
- providing a nonwoven fabric substrate having first and second opposite surfaces;
-
30. A method of making a composite nonwoven fabric comprising:
-
providing a nonwoven fabric substrate having first and second opposite surfaces;
forming a first coating of a microporous formable resin on the first surface of said nonwoven fabric substrate;
forming a second coating of a microporous formable resin on the second surface of said nonwoven fabric substrate; and
stretching the coated nonwoven fabric substrate to impart microporosity to said first and second coatings. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
-
Specification