Porous film and absorptive structure
AssigneeEthyl Corporation
InventorRichard W. Goodrum
Life of this patent
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Abstract
An absorptive structure for absorbing and containing fluids from a source exterior of said structure comprising a topsheet, an absorbent element and a back sheet, wherein said topsheet is a liquid permeable material formed from particles of non-dissolvable polymeric materials partially fused together to form a continuous sheet and has a multiplicity of openings therein of a predetermined size and shape so as to direct fluid flow into the absorbent element and inhibit fluid flow from the absorbent element through the topsheet, and said back sheet is impervious to liquids.
Claims17
A liquid permeable sheet material having the feel and resemblance of soft cloth consisting essentially of particles of non-dissolvable polyolefin or polyvinylchloride polymeric materials partially fused together by heat so as to provide a desired amount of liquid permeability through the spaces provided by the partial fusion of said particles, said particles ranging in size, from about one micron to about 2000 microns, and said sheet having a thickness of about 0.0005 inches to about 0.25 inches.
An absorptive structure for absorbing and containing fluids from a source exterior of said structure comprising a topsheet, an absorbent element and a back sheet, wherein said topsheet is a liquid permeable material formed essentially from particles of non-dissolvable polyolefin or polyvinylchloride polymeric materials partially fused together by heat and having the fuel and resemblance of soft cloth, said partially fused together particles providing a desired amount of liquid permeability through the spaces provided by the partial fusion of said particles, said particles of a size ranging from about one micron to 2000 microns, said top sheet having a thickness of about 0.0005 inches to about 0.25 inches.
Dependencies are inferred from the claim text.