Composite nonwoven fabric and method
AssigneeAmerican Nonwovens Corporation
InventorLoren M. Collins
Life of this patent
Estimating the term…
Abstract
A composite nonwoven fabric and method for making the same includes subjecting a carded web to the action of a cross lapper (B) and then drafting the cross-lapped web by passing the same through a web drafter (C) utilizing a series of wire wound rolls of progressively increased speed. A web of substantially unbonded polymeric fibers is layed from a roll (D) forming a composite web by hydroentanglement utilizing a series of spun bonding steps resulting in a composite web of substantial strength comparison in the machine direction and in cross direction and possessing the characteristics of fabric suitable for use in hospital applications such as surgical gowns.
Claims7
The method of making a nonwoven fabric comprising the steps of:
- cross lapping a carded web so that the fibers of the cross-lapped web are oriented predominately in a cross direction;
- drafting said cross-lapped web so as to turn the fibers from said cross direction toward a machine direction in the drafted web;
- laying a web consisting essentially of unbonded paper pulp fibers in superimposed relation to said drafted web;
- and
- then hydroentangling said paper pulp fibers with said fibers of the drafted web forming a composite web;
- whereby said composite web has a predetermined strength in the machine direction in relation to strength in the cross direction.
A composite hydroentangled fabric useful in surgical gowns having strength in the machine direction in a predetermined relation to strength in the cross direction comprising:
- a cross-lapped carded web of polymeric fibers drafted so that fibers are reoriented toward a machine direction;
- a web of paper pulp fibers layed in superimposed relation to the reoriented fibers of the carded and drafted web and then hydroentangled therewith forming a composite fabric;
- and
- said composite fabric possessing comparable strength in the machine direction and in the cross direction as to facilitate the sewing of sleeves into gowns of the same material while possessing suitable absorbency, drape and hand.
The method of making a nonwoven fabric comprising the steps of:
- cross lapping a carded web constructed of polymeric fibers so that the polymeric fibers of the cross-lapped web are oriented predominately in a cross direction;
- drafting said cross-lapped web so as to turn the fibers from said cross direction toward a machine direction in the drafted web;
- and
- bonding the fibers of the carded, cross-lapped web by hydroentangling the polymeric fibers forming a fabric having a predetermined strength in the machine direction comparable to strength in the cross direction.
Dependencies are inferred from the claim text.