Method of making a corrugated nonwoven web of polymeric microfiber
AssigneeMinnesota Mining and Manufacturing Company
InventorsDavid L. Braun, James E. Steffen, Raju Venkatapathy
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Abstract
A method of making a corrugated nonwoven web of polymeric microfiber, which method comprises: (a) introducing a nonwoven web of polymeric microfiber having a solidity of 0.1 or less into a corrugating apparatus that has a plurality of paddles secured at a first end to a means for moving the paddles about a path, the nonwoven web of polymeric microfiber making contact with spaced second ends of the paddles opposite to the paddles' first ends; and (b) reducing the spacing between the second ends of the paddles to cause the nonwoven web of polymeric microfiber to become corrugated, wherein the corrugated nonwoven web of polymeric microfiber has a solidity of 0.1 or less.
Claims26
A method of making a corrugated nonwoven web of polymeric microfiber, which method comprises:
- (a) introducing a nonwoven web of polymeric microfiber having a solidity of 0.1 or less into a corrugating apparatus that has a plurality of paddles secured at a first end to a means for moving the paddles about a path, the nonwoven web of polymeric microfiber making contact with spaced second ends of the paddles opposite to the paddles' first ends;
- and
- (b) reducing the spacing between the second ends of the paddles to cause the nonwoven web of polymeric microfiber to become corrugated, wherein the corrugated nonwoven web of polymeric microfiber has a solidity of 0.1 or less.
Dependencies are inferred from the claim text.