Ecolab USA Inc.

James L Thomas

Paul Richardson

Zhi Quan Chen

Mei Liu

Robert M Lowe

Bradley Benz

Xiaofeng Zhang

Jinhai Xiao

Kun Hou

Kaihong Huang

Paul F Richardson

The present application discloses a sizing method for making paper. An alkenyl succinic anhydride (ASA) is added to a papermaking process. An aluminum salt is added in one or more process steps during the papermaking process. Preferably, the aluminum salt is an aluminum salt which can generate free aluminum ion in aqueous solution. The sizing method of the present application enhances the usage efficiency of a sizing agent and the aluminum salt, as well as provides paper having a high moisture content.

Sizing method for making paper and paper prepared thereof

The invention provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine containing polymer. The amine containing polymer interacts with materials such as GPAM or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.

Method of increasing paper strength

Growing community of inventors

Naperville, IL, United States of America

James L Thomas