Loading patent…
AssigneeThe Procter & Gamble Company
InventorsDavid Jay Smith, Michael Martyn Headlam
Estimating the term…
Paper products having high initial wet strengths are disclosed. The paper products comprise cellulosic fibers having free aldehyde groups, which fibers are combined with a water-soluble polymer having functional groups that are reacted with the aldehyde groups to form bonds joining the fibers. In a preferred embodiment, the cellulosic fibers contain a polysaccharide in which the hydroxyl groups of at least a portion of the repeating units of the polysaccharide are cis-hydroxyl groups, preferred repeating units being mannose and/or galactose. Similarly, the water-soluble polymer is preferably a polysaccharide in which the hydroxyl groups of at least a portion of the repeating units of the polysaccharide are cis-hydroxyl groups. Preferred polysaccharides are derived from one or more sugars selected from mannose, galactose, allose, altrose, gulose, talose and lyxose.
A paper product comprising paper having an initial total wet tensile strength of at least about 80 g/inch and a 30 minute total wet tensile strength of not more than about 40 g/inch, wherein said paper comprises bleached cellulosic pulp fibers whereby said bleached cellulosic pulp fibers are modified to contain free aldehyde groups said free aldehyde groups formed by the reaction of said bleached cellulosic pulp fibers with an oxidizing agent so as to convert a portion of the hydroxyl groups of said bleached cellulosic pulp fiber to aldehyde groups, said bleached cellulosic pulp fibers combined with a water-soluble polymer having functional groups capable of reacting with said free aldehyde groups, said free aldehyde groups being reacted with said functional groups to form chemical bonds joining said fibers.
A paper product comprising paper having an initial total wet tensile strength of at least about 80 g/inch and a 30 minute total wet tensile strength of not more than about 40 g/inch, wherein said paper comprises cellulosic fibers having free aldehyde groups, said fibers being derived from bleached cellulosic pulp fibers comprising a polysaccharide in which the hydroxyl groups of at least a portion of the repeating units of the polysaccharide are cis-hydroxyl groups, wherein at least a portion of the cellulosic hydroxyl groups have been converted to aldehyde groups, said fibers being combined with a water-soluble polysaccharide in which at least a portion of the hydroxyl groups in at least a portion of the repeating units of the polysaccharide are cis-hydroxyl groups, said aldehyde groups of said fibers being reacted with at least a portion of said cis-hydroxyl groups to form chemical bonds joining said fibers.
Dependencies are inferred from the claim text.