Back to results
US 7,740,786 B2Granted
Process for making necked nonwoven webs having improved cross-directional uniformity
AssigneeKimberly-Clark Worldwide, Inc.
InventorsRobert J. Gerndt, David W. Hall
Life of this patent
Estimating the term…
Abstract
Necked nonwoven webs having improved cross-directional uniformity are made by a process which includes the step (prior to neck stretching) of corrugating the nonwoven web to reduce its width from an initial width A to a reduced corrugated width B. The cross-directional uniformity is optimized as the corrugated width B approaches the ultimate width C of the necked nonwoven web.
Claims20
A process for making a necked nonwoven material, comprising the steps of:
- providing a nonwoven web having a first width A;
- corrugating the nonwoven web in a cross direction using a plurality of laterally spaced castor rollers to provide a corrugated nonwoven web having a second width B less than the first width A;
- passing the corrugated nonwoven web in a machine direction through a necking station wherein the corrugated nonwoven web is necked causing machine direction extension of the nonwoven web and at least some reduction of corrugations do to consolidation of the nonwoven web in the cross direction;
- to thereby provide a necked nonwoven web having a third width C which is less than the first width A.
1 more element
Dependencies are inferred from the claim text.