METHODS FOR MAKING ZONED APERTURED WEBS

摘要

A method for making a zoned apertured nonwoven web comprises providing an unapertured nonwoven web having a first plurality of weakened locations in a first pattern in a first zone and a second plurality of weakened locations in a second pattern in a second zone. The method comprises applying a substantially cross machine directional tensioning force to the nonwoven web to cause the nonwoven web to rupture at some of the first and second pluralities of weakened locations. The applying step creates a plurality of first apertures in the nonwoven web coincident with the some of the first plurality of weakened locations and a plurality of second apertures in the nonwoven web coincident with the some of the second plurality of weakened locations. The cross machine directional width of the nonwoven web after the applying step is substantially the same in the first zone and the second zone.

主权项

1. A method for making a zoned apertured nonwoven web, the method comprising:
advancing a nonwoven web in a machine direction; weakening the nonwoven web at a plurality of first locations in a first zone of the nonwoven web to create a first plurality of weakened locations that are situated in a first pattern; weakening the nonwoven web at a plurality of second locations in a second zone of the nonwoven web to create a second plurality of weakened locations that are situated in a second pattern that is different than the first pattern, wherein the first zone is positioned further upstream than the second zone relative to the machine direction; incrementally stretching the nonwoven web to locally extend portions of the nonwoven web in a direction substantially parallel to a cross machine directional to cause the nonwoven web to rupture at some of the first and second pluralities of weakened locations in the first and second zones; and applying a substantially cross machine directional tensioning force to the nonwoven web to cause the nonwoven web to further define at the some of the first and second pluralities of weakened locations in the first and second zones to create:
a plurality of first apertures in the nonwoven web coincident with the some of the first plurality of weakened locations in the first zone; anda plurality of second apertures in the nonwoven web coincident with the some of the second plurality of weakened locations in the second zone; wherein the cross directional width of the nonwoven web after the applying step is substantially the same in the first zone and the second zone.