Robert J Rowan

US Patent:

20190255211, Aug 22, 2019

Filed:

May 3, 2019

Appl. No.:

16/402831

Inventors:

- St. Paul MN, US
Robert L. Rowan - Lincoln University PA, US

International Classification:

A61L 15/24
A61L 15/42
A61L 15/28
A61L 15/26

Abstract:

Absorbent articles are described comprising an absorbent composite. The absorbent composite comprises a first absorbent layer comprising a polymeric foam having an average cell size of at least 100 microns. The polymeric foam has at least one property selected from a) an indentation force deflection of less than 75 N at 50%; or b) a constant deflection compression set of less than 25% for a deflection of 50%; or a combination of a) and b); and a second absorbent layer in fluid communication with the fluid transport layer. In another embodiment, the a second absorbent layer has an average absorption capacity of at least 20 g/g. In another embodiment, a polyurethane foam is described having an average cell size of at least 100 microns. The polyurethane foam comprises the reaction product of at least one polyol component having polyethylene oxide units and a polyisocyanate component that comprises at least 75 wt-% of at least one polymeric polyisocyanate that lacks urethane linkages. In some embodiments, the polyurethane foam is free of superabsorbent polymer. In some embodiments, the polyurethane foam has an average cell size up to 500 microns. In some embodiments, the polyurethane foam comprises at least 12 wt-% ethylene oxide units. Also described are various composites comprising the polyurethane foam described herein in combination with another substrate such as a second absorbent layer, a fluid impervious backsheet, and/or a fluid pervious topsheet.

US Patent:

20150119837, Apr 30, 2015

Filed:

May 13, 2013

Appl. No.:

14/394106

Inventors:

- St. Paul MN, US
Robert L. Rowan - Lincoln University PA, US

Assignee:

3M INNOVATIVE PROPERTIES COMPANY - St. Paul MN

International Classification:

A61F 13/537
A61L 15/42
B01J 20/28
A61L 15/22
A61F 13/15
B01J 20/26

US Classification:

604369, 604378, 502402

Abstract:

Absorbent articles are described comprising an absorbent composite. The absorbent composite comprises a first absorbent layer comprising a polymeric foam having an average cell size of at least 100 microns and discrete pieces of superabsorbent polymer dispersed within the polymeric foam; and a second absorbent layer in fluid communication with the first absorbent layer. Favored articles include disposable diapers, feminine hygiene articles, and adult incontinence articles. Also described is a polyurethane foam is described having an average cell size of at least 100 microns. The polyurethane foam is the reaction product of a polyether polyol having polyethylene oxide units and at least one polymeric polyisocyanate that lacks urethane linkages. The polyureth ane foam comprises at least 5 wt-% of discrete pieces of superabsorbent polymer. Also described are various composites comprising the polyurethane foam described herein in combination with another substrate such as a second absorbent layer, a fluid impervious backsheet, and/or a fluid pervious topsheet.

US Patent:

20150080823, Mar 19, 2015

Filed:

Apr 5, 2013

Appl. No.:

14/394109

Inventors:

- St. Paul MN, US
Robert L. Rowan - Lincoln University PA, US

International Classification:

A61L 15/24
A61L 15/28

US Classification:

604369

Abstract:

Absorbent articles are described comprising an absorbent composite. The absorbent composite comprises a first absorbent layer comprising a polymeric foam having an average cell size of at least 100 microns. The polymeric foam has at least one property selected from a) an indentation force deflection of less than 75 N at 50%; or b) a constant deflection compression set of less than 25% for a deflection of 50%; or a combination of a) and b); and a second absorbent layer in fluid communication with the fluid transport layer. In another embodiment, the a second absorbent layer has an average absorption capacity of at least 20 g/g. In another embodiment, a polyurethane foam is described having an average cell size of at least 100 microns. The polyurethane foam comprises the reaction product of at least one polyol component having polyethylene oxide units and a polyisocyanate component that comprises at least 75 wt-% of at least one polymeric polyisocyanate that lacks urethane linkages. In some embodiments, the polyurethane foam is free of superabsorbent polymer. In some embodiments, the polyurethane foam has an average cell size up to 500 microns. In some embodiments, the polyurethane foam comprises at least 12 wt-% ethylene oxide units. Also described are various composites comprising the polyurethane foam described herein in combination with another substrate such as a second absorbent layer, a fluid impervious backsheet, and/or a fluid pervious topsheet.