Stowe Woodward Licensco LLC

Kemira Oyj

Charles Hunter

Jun Xu

David L Dauplaise

Robert J Proverb

Lucyna M Pawlowska

Kimberly C Dilts

Michael P O'Toole

Chris Tyson

Christopher Hill

Christopher Tyson

Harold A Goldsberry, Iii

Glenn E Baikow

Katarzyna Komarowska

Michael J Scanlon

The present invention relates generally to an industrial roll, comprising: a substantially cylindrical metallic core; a base layer that is adhered to and circumferentially overlies the core; a polymeric topstock layer that circumferentially overlies the base layer; and a hydrophobic and/or amphiphobic coating that circumferentially overlies the topstock layer.

Hydrophobic and/or amphiphobic roll cover

A calender roll for a papermaking machine includes: a substantially cylindrical core; and a cover circumferentially surrounding the core. The cover comprises a base layer circumferentially overlying the core; and a topstock layer comprising polyurethane circumferentially overlying the base layer, the topstock layer being fiber reinforced, the polyurethane having a glass transition temperature of between about 120 and 150&#xb0; C., the topstock layer having a hardness of 70 to 90 ShD.

Polyurethane roll cover for calender roll for papermaking machine

The invention relates to an aqueous sizing composition comprising (a) an emulsion comprising an alkenylsuccinic anhydride component containing alkenylsuccinic anhydride particles suspended in a first starch component containing emulsifying starch selected from the group consisting of non-ionic starches, ionic starches, and mixtures thereof, and (b) a second starch component selected from the group consisting of non-ionic starches, ionic starches and mixtures thereof, such that the alkenylsuccinic anhydride and the starch in the emulsion and the second starch component are present at a starch: alkenylsuccinic anhydride weight ratio that is sufficiently high to enable the sizing composition to impart useful sizing properties to a fibrous substrate when the sizing composition contacts the fibrous substrate. The invention also relates to fibrous substrates treated with the sizing composition, processes for making the composition and processes for using such a composition, and other compositions. In one embodiment, alkylene ketene dimer is used instead of alkenylsuccinic anhydride.

Alkenylsuccinic anhydride composition and method of using the same

Growing community of inventors

Winchester, VA, United States of America

Charles Hunter