Lee J Hesler, Stanley C Park: Aramid papers containing aramid paper pulp. E I Du Pont de Nemours and Company, June 25, 1991: US05026456 (51 worldwide citation)

An aramid paper which has high porosity while exhibiting the usual tensile properties is disclosed. The paper has good saturability and a smooth surface while retaining high break strength.

Arnold Frances, Lee J Hesler, James E Van Trump, Rita M Vasta: Method of making fibrids. E I Du Pont de Nemours and Company, May 11, 1993: US05209877 (10 worldwide citation)

A thickener for liquids is disclosed. The thickener consists of organic polymer fibrid particles with a very small size, a very high aspect ratio, and very low bulk density. The thickener is made by drying newly-coagulated fibrid particles in a way that results in high particulate surface area.

Gary L Hendren, Lee J Hesler: Cross-directional distribution of additives in synthetic papers. E I du Pont de Nemours and Co ny, July 10, 1990: US04940512 (7 worldwide citation)

A process for making a wet-laid, elongate, nonwoven flexible sheet having an additive distributed in a predetermined cross-directional pattern includes providing two synthetic fibrous stocks containing the additive in a concentration higher in one stock than in the other stock. The stocks are suppli ...

Dexter L Atkinson, Arnold Frances, Lee J Hesler: Fibrid reinforced elastomers. E I Du Pont de Nemours and Company, July 19, 1994: US05331053 (5 worldwide citation)

Polymeric fibrids reinforce elastomers to yield well-blended products of high modulus and elongation.

Philip P Burks Jr, Lee J Hesler: Layered smooth surface aramid papers of high strength and printability. E I Du Pont de Nemours and Company, April 22, 1997: US05622775 (4 worldwide citation)

A multi-layered smooth-calendered surface aramid paper with high break strength and tear resistance comprises a substrate layer and at least one surface layer intimately bonded to the substrate layer, wherein the surface layer(s) consists essentially of 65 to 90% by weight aramid fibrids and 10 to 3 ...

Gary L Hendren, Lee J Hesler: Tough layered papers with improved surface adhesion. E I Du Pont de Nemours and Company, June 14, 1994: US05320892 (4 worldwide citation)

A laminate for honeycomb structures comprised of two outside layers having good surface adhesion and a tough core layer, said core constituting from 50 to 70% by weight of the laminate and containing from about 60 to 80% by weight of poly(m-phenylene isophthalamide) fibrids and each outside layer co ...