Flash curing of fibrous webs treated with polymeric reactive compounds
First Claim
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1. 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.
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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.
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Citations
50 Claims
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1. A method for making a high wet performance paper web comprising:
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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.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 27, 28, 29, 30, 31, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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21. A method for making a high wet performance paper web comprising:
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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. - View Dependent Claims (22)
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25. A method for making a high wet performance paper web comprising:
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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%.- View Dependent Claims (26, 49, 50)
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32. A method for making a high wet performance paper web comprising:
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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. - View Dependent Claims (33)
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34. A method for making a high wet performance paper web comprising:
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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.
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36. A method for making a high wet performance paper web comprising:
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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.
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Specification