Nonwoven fabric
AssigneeJohnson & Johnson
InventorsAngelo P. Ruffo, Prashant K. Goyal
Life of this patent
Estimating the term…
Abstract
A novel web that can be produced by the process of the present invention is comprised of two different types of fibers, with the web characterized by having a predominance of one fiber type at one of its major faces, and a predominance of the other fiber type at the other of its major faces. The web includes a transition between the faces in which the predominance of the fibers decreases uniformly away from the face at which they predominate.
Claims4
An air-laid nonwoven web having a thickness from about 1/32 inch to about 1 inch and having a pair of opposed major faces, comprised at one of said faces of a blend of a major proportion by weight of a staple length fiber having a length from about 1/2 inch to about 21/2 inches as a first fiber type and a minor proportion by weight of short cellulose fibers having a length less than about one-fourth inch as a second fiber type interspersed therewith, and comprises at said other face of a blend of a major proportion by weight of said second fiber type and a minor proportion by weight of said first fiber type interspersed therewith, the web between said faces being comprised of a blend of fibers exhibiting a continuous uniform transition in which the proportion of said first fiber in the blend becomes progressively and continuously less with distance from said one face while the proportion of said second fiber in the blend becomes progressively and continuously less with distance from said other face, each of said fiber types being present in an amount of at least 5% at each major face.
Dependencies are inferred from the claim text.