Method and apparatus for making microbubbled and/or...

Details Method and apparatus for making microbubbled and/or... Method and apparatus for making microbubbled and/or...

B - Operations, Transporting

29

C

18/1054

B29C 59/00 (2006.01) A61F 13/15 (2006.01) A61L 15/00 (2006.01) B29C 51/22 (2006.01) B29C 59/02 (2006.01)

Patent

CA 1313009

METHOD AND APPARATUS FOR MAKING MICROBUBBLED AND/OR MICROAPERTURED POLYMERIC WEBS USING HYDRAULIC PRESSURE ABSTRACT A method for hydraulically deforming a web of polymeric film while the film is supported on a moving forming structure to produce a novel microbubbled substantially fluid-impervious web exhibiting substantially the same consumer preferred soft and silky tactile impression and reduced noise generation levels heretofore only achievable in microapertured, and hence substantially fluid pervious polymeric webs. in a particularly preferred embodiment, the microbubbled polymeric web exhibits a fine-scale pattern of discrete mushroom shaped surface aberrations, each of said surface aberrations having its amplitude oriented substantially perpendicular to the surface in which the surface aberration originates. The method may also be utilized to produce fluid pervious microapertured webs which are known in the art. Apparatus for producing microbubbled and/or microapertured webs either in "planar" or "macroscopically expanded" form are also disclosed.

575465

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