Paper articles exhibiting water resistance and method for making same
AssigneeInternational Paper Company
InventorsRichard Williams, Peter M. Froass, Sandeep Kulkarni
Life of this patent
Estimating the term…
Abstract
This invention relates to a process for preparing sized paper and paperboard which incorporates in the paper and paperboard at the size press size a composition comprising one or more “hydrophobic polymers” wherein hydrophobic polymers, the amount of such polymers and the weight ratio of starch to such polymer in the composition are selected such that the paper and paper board exhibits a Cobb Value equal to or less than about 25 and to a sized paper or paperboard web formed by the process.
Claims22
1-27. (canceled)
A process of making a paper or paperboard, comprising contacting a paper or paperboard web comprising expandable microspheres at a size press with a composition comprising at least one hydrophobic polymer at an amount that is selected such that the paper or paper board exhibits a Cobb value that is equal to or less than 25.
Dependencies are inferred from the claim text.