Flash curing of fibrous webs treated with polymeric reactive compounds
AssigneeKimberly-Clark Worldwide, Inc.
InventorsTong Sun, Jeffrey D. Lindsay
Life of this patent
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Abstract
Methods for making high wet performance webs. A polymeric anionic reactive compound is applied to a cellulosic fibrous web followed by flash curing of the compound to crosslink the cellulose fibers. The resulting tissue has high wet resiliency, high wet strength, and a high wet:dry tensile strength ratio.
Claims50
A method for making a high wet performance paper web comprising:
- forming a web comprising cellulosic papermaking fibers;
- treating the web with an aqueous solution of a polymeric anionic reactive compound (PARC);
- flash curing the treated web by heating the web to a temperature above 160° C. for less than 1 minute so that covalent bonds form between the PARC and the cellulosic fibers.
A method for making a high wet performance paper web comprising:
- forming a web comprising cellulosic papermaking fibers;
- treating the web with an aqueous solution of a polymeric anionic reactive compound (PARC);
- flash curing the treated web so that covalent bonds form between the PARC and the cellulosic fibers, wherein the treated web is dried prior to curing to a dryness level of about 90% or higher.
A method for making a high wet performance paper web comprising:
- forming a web comprising cellulosic papermaking fibers;
- treating the web with an aqueous solution of a polymeric anionic reactive compound (PARC);
- flash curing the treated web so that covalent bonds form between the PARC and the cellulosic fibers, wherein the wet:dry ratio of the treated and cured paper is at least about 20%.
A method for making a high wet performance paper web comprising:
- forming a web comprising cellulosic papermaking fibers;
- treating the web with an aqueous solution of a polymeric anionic reactive compound (PARC);
- flash curing the treated web so that covalent bonds form between the PARC and the cellulosic fibers, wherein the PARC solution has a pH of about 3 or greater.
A method for making a high wet performance paper web comprising:
- forming a web comprising cellulosic papermaking fibers;
- treating the web with an aqueous solution of a polymeric anionic reactive compound (PARC);
- flash curing the treated web so that covalent bonds form between the PARC and the cellulosic fibers, wherein the PARC solution has a viscosity as applied of about 10 centipoise or less.
A method for making a high wet performance paper web comprising:
- forming a web comprising cellulosic papermaking fibers;
- treating the web with an aqueous solution of a polymeric anionic reactive compound (PARC);
- flash curing the treated web so that covalent bonds form between the PARC and the cellulosic fibers, wherein the PARC has a viscosity of 100 centipoise or less at 25° C. and at a concentration in water of 50% by weight or as high as can be dissolved.
Dependencies are inferred from the claim text.