Perforated films having channels with cutout portions capable of spontaneous fluid inversion
AssigneeEastman Chemical Company
InventorBobby Mal Phillips
Life of this patent
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Abstract
A polymeric film for use in absorbent structures comprises a planar surface having a frontside, a backside and a plurality of apertures. Walls extend from the perimeter of the apertures and outwardly from the backside. The walls and the backside form a capillary system on the backside. The walls form channels which connect the frontside of the film to the capillary system on the backside. The walls have at least one cut out portion extending the length of the walls. A fluid contacting the frontside of the film will spontaneously invert to the capillary system on the backside of the film through the cut out portions of the walls.
Claims12
A polymeric film made for use in absorbent structures comprising
- a planar surface and a plurality of walls;
- said planar surface having a frontside, a backside coated with a hydrophilic material and a plurality of apertures;
- said plurality of walls extending from the perimeter of said apertures and outwardly from said backside;
- said walls and said backside forming a capillary system on said backside;
- said walls forming channels connecting said frontside to said capillary system on said backside;
- and
- a plurality of said walls having at least one cut out portion,
- whereby a fluid contacting the frontside of the film spontaneously inverts to the capillary system on the backside of the film through the cut out portions of the walls.
Dependencies are inferred from the claim text.