Tredegar Industries, Inc.

Robert K McBride

Carl D Ray

Paul Eugene Thomas

Peter I Chang

Gregory M Rieker

James M Adams

Charles A Kendall

A process for the manufacture of a vapor permeable, liquid impermeable composite material comprising a three-dimensional apertured substrate having a vapor permeable, liquid impermeable coating material thereon, the substantially liquid impervious composite material, and an apparatus for making the composite material are disclosed. Successive portions of a continuous sheet of an apertured substrate are passed into contact with a continuous moving perforated member. The coating material is supplied onto the substrate. The coated substrate is subjected to a vacuum which causes the coating material to flow onto the substrate material and in certain embodiments, at least partially into the apertures in the substrate. The vacuum is maintained for a period of time sufficient for the coating material to adhere to the substrate. The coated portions of the substrate are continuously removed from the moving member.

Vacuum assisted application of thin vapor permeable, liquid impermeable

A process for the manufacture of apertured, three-dimensional substrates having an extrusion coating material thereon, the coated substrate and an apparatus for making the coated substrate are disclosed. Successive portions of a continuous sheet of the apertured substrate which has a top surface and a bottom surface are passed into contact with a continuous moving perforated member. The coating material is supplied onto the top surface of the continuous moving substrate. The bottom surface of the substrate is subjected to a vacuum. The vacuum causes the coating material to flow onto the top surface of the substrate material and in certain embodiments, at least partially into the apertures in the substrate. The vacuum is maintained for a period of time sufficient for the coating material to bond to the substrate. The coated portions of the substrate are continuously removed from the moving member.

Vacuum assisted application of thin coatings on apertured substrates and

Portion of a patterned film

Liquid impervious, biodegradable films are disclosed. In particular, the films comprise a blend of an interpenetrated network of destructurized starch with ethylene/acrylic acid copolymers or ethylene/vinyl alcohol copolymers, and an aliphatic polyester such as polycaprolactone. Diapers, sanitary napkins, pantiliners, and the like, containing backsheets prepared from the foregoing materials are also disclosed.

Biodegradable, liquid impervious films

Liquid impervious, biodegradable films are disclosed. In particular, the films comprise a blend of an interpenetrated network of destucturized starch with ethylene/acrylic acid copolymers or ethylene/vinyl alcohol copolymers, and an aliphatic polyester such as polycaprolactone. Diapers, sanitary napkins, pantiliners, and the like, containing backsheets prepared from the foregoing materials are also disclosed.

Disposable absorbent articles with biodegradable backsheets

A refastenable disposable diaper having a backsheet of low density polyethylene and polypropylene.

Growing community of inventors

Jasonville, IN, United States of America

Robert K McBride