초록 ▼

The present invention is a soft tissue sheet having reduced lint and slough. The tissue sheet comprises papermaking fibers and a synthetic co-copolymer. The synthetic co-polymer has the general structure: wherein R1, R2, R3 are independently selected from a group consisting of: H; C1-4 alkyl rad

The present invention is a soft tissue sheet having reduced lint and slough. The tissue sheet comprises papermaking fibers and a synthetic co-copolymer. The synthetic co-polymer has the general structure: wherein R1, R2, R3 are independently selected from a group consisting of: H; C1-4 alkyl radicals; and, mixtures thereof; R4 is selected from a group consisting of C1-C8 alkyl radicals and mixtures thereof; Z1 is a bridging radical attaching the R4 functionality to the polymer backbone; and, Q1 is a functional group containing at least a cationic quaternary ammonium radical. w, x, y≧1 and the mole ratio of x to (x+y) is about 0.5 or greater.

대표청구항 ▼

We claim: 1. A method of making a soft, low lint tissue sheet, comprising: (a) forming an aqueous suspension comprising papermaking fibers; (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric thereby forming a wet tissue sheet; (c) dewatering the wet tissue sheet there

We claim: 1. A method of making a soft, low lint tissue sheet, comprising: (a) forming an aqueous suspension comprising papermaking fibers; (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric thereby forming a wet tissue sheet; (c) dewatering the wet tissue sheet thereby forming a dewatered tissue sheet; and, (d) applying a synthetic co-polymer to the papermaking fibers in an amount from about 0.02 to about 5 weight percent by weight of dried papermaking fibers, said papermaking fibers having a consistency from about 0.2% to about 50%, the synthetic co-polymer having the general structure: wherein: R1, R2, R3 are independently selected from a group consisting of: H; C1-4 alkyl radicals; and, mixtures thereof; R4 is selected from a group consisting of C1-C8 alkyl radicals and mixtures thereof; Z1 is selected from a group consisting of: —O—; —COO—; —OOC—; —CONH—; —NHCO—; and mixtures thereof; and, Q1 is a functional group containing at least a cationic quaternary ammonium radical, wherein w, x, y ≧1 and the mole ratio of x to (x+y) is about 0.5 or greater; and (e) drying the dewatered tissue sheet, thereby forming a dried treated tissue sheet having reduced geometric mean tensile strength as compared to an untreated tissue sheet and reduced slough as compared to a tissue sheet treated with the same amount of a commercially-available cationic oleylimidazoline debonder, wherein the amount of slough is from about 1.2 to about 3.0 milligrams. 2. The method of claim 1, wherein the synthetic co-polymer is applied to the wet tissue sheet having a consistency from about 10 percent to about 80 percent. 3. The method of claim 1, wherein the synthetic co-polymer is applied to the wet tissue sheet having a consistency from about 10 percent to about 50 percent. 4. The method of claim 1, wherein R1 is H, R2 is H, R3 is H or —CH3, and R4 is selected from the group consisting of: methyl radicals; ethyl radicals; propyl radicals; butyl radicals; and, mixtures thereof. 5. The method of claim 1, wherein Q1 of the synthetic co-polymer is derived from monomers selected from the group consisting of: [2-(methacryloyloxy)ethyl] trimethylammonium methosulfate; [2-(methacryloyloxy)ethyl] trimethylammonium ethosulfate; dimethyldiallyl ammonium chloride; 3-acryloamido-3-methyl butyl trimethyl ammonium chloride; vinyl benzyl trimethyl ammonium chloride; 2-[(acryloyloxy)ethyl]trimethylammonium chloride; [2-(methacryloyloxy)ethyl] trimethylammonium chloride; and, mixtures thereof. 6. The method of claim 1, wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.75 or greater. 7. The method of claim 1, wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.90 or greater. 8. The method of claim 1, wherein the synthetic co-polymer has an average molecular weight between about 10,000 to about 5,000,000. 9. The method of claim 1, wherein the synthetic co-polymer is water soluble or water dispersible. 10. The method of claim 1, wherein the dried tissue sheet has a Wet Out Time of about 180 seconds or less. 11. The method of claim 1, wherein the dried tissue sheet has a basis weight of about 5 to about 150 g/m2 and a bulk of about 2 cm3/g or greater. 12. The method of claim 10, wherein the dried tissue sheet has a bulk of about 4 cm3/g or greater. 13. A method of making a soft, low lint tissue sheet, comprising: (a) forming an aqueous suspension comprising papermaking fibers; (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric thereby forming a wet tissue sheet; (c) dewatering the wet tissue sheet thereby forming a dewatered tissue sheet; (d) applying a synthetic co-polymer to the papermaking fibers in an amount from about 0.02 to about 5 weight percent by weight of dried papermaking fibers, said papermaking fibers having a consistency from about 0.1% to about 50%, the synthetic co-polymer having the general structure: wherein: w, x, y ≧1; the mole ratio of (x+z) to (x+y+z) is greater than 0.5 and the mole ratio of z to (x+z) is from about 0 to about 0.8; R1, R2, R3 are independently selected from a group consisting of: H; C1-4 alkyl radicals; and, mixtures thereof; R4 is selected from a group consisting of C1 - C8 alkyl radicals and mixtures thereof; Z1 is selected from a group consisting of: —O—; —COO—; —OOC—; —CONH—; —NHCO—; and mixtures thereof; Q1 is a functional group containing at least a cationic quaternary ammonium radical; and, Q2 is derived from monomers selected from the group of: hydroxyalkyl acrylates; hydroxyalkyl methacrylates; hydroxyethyl acrylate; polyalkoxyl acrylates; polyalkoxyl methacrylates; diacetone acrylamide; N-vinylpyrrolidinone; N-vinylformamide; and mixtures thereof; and (e) drying the dewatered tissue sheet, thereby forming a dried treated tissue sheet having reduced geometric mean tensile strength as compared to an untreated tissue sheet and reduced slough as compared to a tissue sheet treated with the same amount of a commercially-available cationic oleylimidazoline debonder, wherein the amount of slough is from about 1.2 to about 3.0 milligrams. 14. The method of claim 13, wherein the synthetic co-polymer is applied to the wet tissue sheet having a consistency from about 10 percent to about 80 percent. 15. The method of claim 13, wherein the synthetic co-polymer is applied to the wet tissue sheet having a consistency from about 10 percent to about 50 percent. 16. The method of claim 13 wherein the hydroxyalkyl methacrylate is a hydroxyethyl methacrylate. 17. The method of claim 13, wherein the polyalkoxyl acrylate is a polyethyleneglycol acrylate. 18. The method of claim 13, wherein the polyalkoxyl methacrylate is a polyethyleneglycol methacrylate. 19. The method of claim 13, wherein the mole ratio of (x+z) to (x+y+z) of the synthetic co-polymer is about 0.75 or greater. 20. The method of claim 13, wherein the mole ratio of (x+z) to (x+y+z) of the synthetic co-polymer is about 0.90 or greater. 21. The method of claim 13, wherein the mole ratio of z to (x+z) of the synthetic co-polymer is from about 0 to about 0.4. 22. The method of claim 13, wherein the mole ratio of z to (x+z) of the synthetic co-polymer is from about 0 to about 0.2. 23. The method of claim 13, wherein the synthetic co-polymer has an average molecular weight between about 10,000 to about 5,000,000. 24. The method of claim 13, wherein the synthetic co-polymer is water soluble or water dispersible. 25. The method of claim 24, wherein the dried tissue sheet has a Wet Out Time of about 180 seconds or less. 26. The method of claim 13, wherein the dried tissue sheet has a basis weight of about 5 to about 100 g/m2, and a bulk of about 2 cm3/g or higher. 27. The method of claim 26, wherein the dried tissue sheet has a bulk of about 4 cm3/g or greater.