Binders curable at room temperature with low blocking
AssigneeKimberly-Clark Worldwide, Inc.
InventorsMike Thomas Goulet, Tracy Ho Mathews, Stacey Lynn Pomeroy, Maurizio Tirimacco
Life of this patent
Estimating the term…
Abstract
Topically-applied binder materials for imparting wet strength to soft, absorbent paper sheets, such as are useful as household paper towels and the like, include an azetidinium-reactive polymer, such as a carboxyl-functional polymer, an azetidinium-functional polymer and, optionally, a component useful for reducing sheet-to-sheet adhesion (blocking) in the product. These binder materials can be cured at ambient temperature over a period of days and do not impart objectionable odor to final product when wetted.
Claims12
A method of increasing the strength of a paper towel basesheet comprising topically applying an aqueous binder composition to one or both outer surfaces of the web to produce a fibrous web having at least one binder-treated surface, wherein the binder composition comprises a mixture of an azetidinium-reactive polymer, an azetidinium-functional cross-linking polymer and from about 1 to about 25 weight percent, on a solids basis relative to the amount of the azetidinium-reactive polymer, of an anti-blocking additive, and thereafter adhering a binder-treated surface of the fibrous web to a creping cylinder and creping the web, wherein the anti-blocking additive is selected from the group consisting of glyoxal, gluteraldehyde, waxes and sugars.
Dependencies are inferred from the claim text.