Patent ID: 8328983

Claim:
A method of producing a modified bleached Kraft pulp for use in paper or paper web products, the method comprising: treating wood chips with an alkaline solution in an extraction process to remove 5% to 20% hemicellulose to provide extracted hemicellulose and to form a treated wood chips under caustic condition; subjecting said treated wood chips to Kraft pulping to form a modified Kraft pulp wherein the amount of hemicellulose contained in the modified Kraft pulp is from more than 4% to up to and including about 9% by oven dried weight of the modified Kraft pulp; and after the subjecting step, bleaching the modified Kraft pulp to form a modified bleached Kraft pulp having an ISO brightness of at least 80; and after bleaching, manufacturing paper, paperboard, or fluff pulp using a pulp composition comprising the modified bleached Kraft pulp; and wherein the extracted hemicellulose is oxidized or derivatized with ether functional groups or cationic charges and then added to a size press or coater of a papermaking process.