US2004084162A1PendingUtilityA1
Low slough tissue products and method for making same
Priority: Nov 6, 2002Filed: Nov 6, 2002Published: May 6, 2004
Est. expiryNov 6, 2022(expired)· nominal 20-yr term from priority
D21H 17/455D21H 21/24D21H 17/45
49
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Claims
Abstract
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 R 1 , R 2 , R 3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals; and, mixtures thereof; R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof; Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone; and, Q 1 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.
Claims
exact text as granted — not AI-modifiedWe claim:
1 . A soft tissue sheet having reduced lint and slough comprising papermaking fibers and a synthetic co-copolymer, the synthetic co-polymer having the general structure:
wherein:
R 1 , R 2 , R 3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals; and, mixtures thereof;
R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof;
Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone; and,
Q 1 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.
2 . The soft tissue sheet of claim 1 , wherein the amount of the synthetic co-polymer is from about 0.02 to about 5 weight percent by weight of dried papermaking fibers.
3 . The soft tissue sheet of claim 1 , wherein the soft tissue sheet has a Wet Out Time of about 180 seconds or less.
4 . The soft tissue sheet of claim 1 , wherein Z 1 is selected from a group consisting of: —O—;
—COO—; —OOC—; —CONH—; —NHCO—; and, mixtures thereof.
5 . The soft tissue sheet of claim 1 , wherein the soft tissue sheet has a basis weight of about 5 to about 150 g/m 2 and a bulk of about 2 cm 3 /g or greater.
6 . The soft tissue sheet of claim 5 , wherein the soft tissue sheet has a bulk of about 4 cm 3 /g or greater.
7 . The soft tissue sheet of claim 1 wherein R 1 is H, R 2 is H, R 3 is H or —CH 3 , and R 4 is selected from the group consisting of: methyl radicals; ethyl radicals; propyl radicals; butyl radicals; and, mixtures thereof.
8 . The soft tissue sheet of claim 1 , wherein Q 1 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.
9 . The soft tissue sheet of claim 1 , wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.75 or greater.
10 . The soft tissue sheet of claim 1 , wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.90 or greater.
11 . The soft tissue sheet of claim 1 , wherein the synthetic co-polymer is water soluble or water dispersible.
12 . A soft tissue sheet having reduced lint and slough comprising papermaking fibers and a synthetic co-copolymer, the synthetic co-polymer having the general structure:
wherein:
w, x, y≧1;
the mole ratio of (x+z) to (x+y+z) is about 0.5 or greater and the mole ratio of z to (x+z) is from about 0 to about 0.8;
R 1 , R 2 , R 3 are independently selected from a group consisting of H, C 1-4 alkyl radicals, and mixtures thereof;
R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof;
Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone;
Q 1 is a functional group containing at least a cationic quaternary ammonium radical; and,
Q 2 is selected from a group consisting of: non-ionic hydrophilic monomers; water soluble monomers; and, mixtures thereof.
13 . The soft tissue sheet of claim 12 , wherein the amount of the synthetic co-polymer is from about 0.02 to about 5 weight percent by weight of dried papermaking fibers.
14 . The soft tissue sheet of claim 12 , wherein the soft tissue sheet has a Wet Out Time of about 180 seconds or less.
15 . The soft tissue sheet of claim 12 , wherein Z 1 is selected from a group consisting of:
—O—; —COO—; —OOC—; —CONH—; —NHCO—; and, mixtures thereof.
16 . The soft tissue sheet of claim 12 , wherein Q 2 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.
17 . The soft tissue sheet of claim 12 , wherein the soft tissue sheet has a basis weight of about 5 to about 150 g/m 2 and a bulk of about 2 cm 3 /g or greater.
18 . The soft tissue sheet of claim 12 , wherein the soft tissue sheet has a bulk of about 4 cm 3 /g or greater.
19 . The soft tissue sheet of claim 12 , wherein R 1 is H, R 2 is H, R 3 is H or —CH 3 , and R 4 is selected from the group consisting of methyl radicals; ethyl radicals; propyl radicals; butyl radicals; and, mixtures thereof.
20 . The soft tissue sheet of claim 12 , wherein Q 1 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.
21 . The soft tissue sheet of claim 16 , wherein the polyalkoxyl acrylate is a polyethyleneglycol acrylate.
22 . The soft tissue sheet of claim 16 , wherein the polyalkoxyl methacrylate is a polyethyleneglycol methacrylate.
23 . The soft tissue sheet of claim 12 , wherein the synthetic co-polymer is water soluble or water dispersible.
24 . A tissue chemical additive capable of debonding a tissue sheet containing papermaking fibers treated with the chemical additive while reducing the lint and slough of the tissue sheet treated with the chemical additive.
25 . The tissue chemical additive of claim 24 comprising a synthetic co-polymer having the general structure:
Wherein:
R 1 , R 2 , R 3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals;
and, mixtures thereof;
R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof;
Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone; and,
Q 1 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.
26 . The tissue chemical additive of claim 25 , wherein R 1 is H, R 2 is H, R 3 is H or —CH 3 , and R 4 is selected from the group consisting of: methyl radicals; ethyl radicals; propyl radicals; butyl radicals; and, mixtures thereof.
27 . The tissue chemical additive of claim 25 , wherein Q 1 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.
28 . The tissue chemical additive of claim 25 , wherein Z 1 of the synthetic co-polymer is selected from a group consisting of: —O—; —COO—; —OOC—; —CONH—; —NHCO—; and,
mixtures thereof.
29 . The tissue chemical additive of claim 25 , wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.75 or greater.
30 . The tissue chemical additive of claim 25 , wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.90 or greater.
31 . The tissue chemical additive of claim 25 , wherein the synthetic co-polymer has an average molecular weight between about 10,000 to about 5,000,000.
32 . The tissue chemical additive of claim 25 , wherein the synthetic co-polymer is water dispersible or water soluble.
33 . The tissue chemical additive of claim 24 comprising a synthetic co-polymer having the general structure:
Wherein:
w, x, y≧1;
the mole ratio of (x+z) to (x+y+z) is about 0.5 or greater and the mole ratio of z to x is from about 0 to about 0.8;
R 1 , R 2 , R 3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals; and, mixtures thereof;
R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof;
Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone;
Q 1 is a functional group containing at least a cationic quaternary ammonium radical; and,
Q 2 is selected from a group consisting of: non-ionic hydrophilic monomers; water soluble monomers; and, mixtures thereof.
34 . The tissue chemical additive of claim 33 , wherein Z 1 of the synthetic co-polymer is selected from a group consisting of: —O—; —COO—; —OOC—; —CONH—; —NHCO—; and,
mixtures thereof.
35 . The tissue chemical additive of claim 33 , wherein Q 2 of the synthetic co-polymer 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.
36 . The tissue chemical additive of claim 35 , wherein the hydroxyalkyl methacrylate is a hydroxyethyl methacrylate.
37 . The tissue chemical additive of claim 35 , wherein the polyalkoxyl acrylate is a polyethyleneglycol acrylate.
38 . The tissue chemical additive of claim 35 , wherein the polyalkoxyl methacrylate is a polyethyleneglycol methacrylate.
39 . The tissue chemical additive of claim 33 , wherein the mole ratio of (x+z) to (x+y+z) of the synthetic co-polymer is about 0.75 or greater.
40 . The tissue chemical additive of claim 33 , wherein the mole ratio of (x+z) to (x+y+z) of the synthetic co-polymer is about 0.90 or greater.
41 . The tissue chemical additive of claim 33 , wherein the mole ratio of z to (x+z) of the synthetic co-polymer is from about 0 to about 0.4.
42 . The tissue chemical additive of claim 33 , wherein the mole ratio of z to (x+z) of the synthetic co-polymer is from about 0 to about 0.2.
43 . The tissue chemical additive of claim 33 , wherein the synthetic co-polymer has an average molecular weight between about 10,000 to about 5,000,000.
44 . The tissue chemical additive of claim 33 , wherein the tissue chemical additive is water soluble or water dispersible.
45 . 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-copolymer to the papermaking fibers, the synthetic co-polymer having the general structure: Wherein: R 1 , R 2 , R 3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals; and, mixtures thereof; R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof; Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone; and, Q 1 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.
46 . The method of claim 45 , wherein the amount of the synthetic co-polymer is from about 0.02 to about 5 weight percent by weight of dried papermaking fibers.
47 . The method of claim 45 , wherein the synthetic co-polymer is applied to the wet tissue sheet having a consistency from about 10 percent to about 80 percent.
48 . The method of claim 45 , wherein the synthetic co-polymer is applied to the wet sheet having a consistency from about 10 percent to about 50 percent.
49 . The method of claim 45 , wherein the synthetic co-polymer is applied to the aqueous suspension of pulp fibers having a consistency from about 0.2% to about 50%.
50 . The method of claim 45 , further comprising drying the treated dewatered tissue sheet thereby forming a dried treated tissue sheet.
51 . The method of claim 45 , wherein Z 1 of the synthetic co-polymer is selected from a group consisting of: —O—; —COO—; —OOC—; —CONH—; —NHCO—; and, mixtures thereof.
52 . The method of claim 45 , wherein R 1 is H, R 2 is H, R 3 is H or —CH 3 , and R 4 is selected from the group consisting of: methyl radicals; ethyl radicals; propyl radicals; butyl radicals; and, mixtures thereof.
53 . The method of claim 45 , wherein Q 1 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.
54 . The method of claim 45 , wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.75 or greater.
55 . The method of claim 45 , wherein the mole ratio of x to (x+y) of the synthetic co-polymer is about 0.90 or greater.
56 . The method of claim 45 , wherein the synthetic co-polymer has an average molecular weight between about 10,000 to about 5,000,000.
57 . The method of claim 45 , wherein the synthetic co-polymer is water soluble or water dispersible.
58 . The method of claim 50 , wherein the dried tissue sheet has a Wet Out Time of about 180 seconds or less.
59 . The method of claim 50 , wherein the dried tissue sheet has a basis weight of about 5 to about 150 g/m 2 and a bulk of about 2 cm 3 /g or greater.
60 . The method of claim 58 , wherein the dried tissue sheet has a bulk of about 4 cm 3 /g or greater.
61 . 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-copolymer to the papermaking fibers, 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; R 1 , R 2 , R 3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals; and, mixtures thereof; R 4 is selected from a group consisting of C 1 -C 8 alkyl radicals and mixtures thereof; Z 1 is a bridging radical attaching the R 4 functionality to the polymer backbone; Q 1 is a functional group containing at least a cationic quaternary ammonium radical; and, Q 2 is selected from a group consisting of: non-ionic hydrophilic monomers; water soluble monomers; and, mixtures thereof.
62 . The method of claim 61 , wherein the amount of the synthetic co-polymer is from about 0.02 to about 5 weight percent by weight of dried papermaking fibers.
63 . The method of claim 61 , wherein the synthetic co-polymer is applied to the wet tissue sheet having a consistency from about 10 percent to about 80 percent.
64 . The method of claim 61 , wherein the synthetic co-polymer is applied to the wet sheet having a consistency from about 10 percent to about 50 percent.
65 . The method of claim 61 , wherein the synthetic co-polymer is applied to the aqueous suspension having a consistency from about 0.1% to about 50%.
66 . The method of claim 61 , further comprising drying the dewatered tissue sheet thereby forming a dried tissue sheet.
67 . The method of claim 61 , wherein Z 1 of the synthetic co-polymer is selected from a group consisting of: —O—; —COO—; —OOC—; —CONH—; —NHCO—; and, mixtures thereof.
68 . The method of claim 61 , wherein Q 2 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.
69 . The method of claim 68 wherein the hydroxyalkyl methacrylate is a hydroxyethyl methacrylate.
70 . The method of claim 68 , wherein the polyalkoxyl acrylate is a polyethyleneglycol acrylate.
71 . The method of claim 68 , wherein the polyalkoxyl methacrylate is a polyethyleneglycol methacrylate.
72 . The method of claim 61 , wherein the mole ratio of (x+z) to (x+y+z) of the synthetic co-polymer is about 0.75 or greater.
73 . The method of claim 61 , wherein the mole ratio of (x+z) to (x+y+z) of the synthetic co-polymer is about 0.90 or greater.
74 . The method of claim 61 , wherein the mole ratio of z to (x+z) of the synthetic co-polymer is from about 0 to about 0.4.
75 . The method of claim 61 , wherein the mole ratio of z to (x+z) of the synthetic co-polymer is from about 0 to about 0.2.
76 . The method of claim 61 , wherein the synthetic co-polymer has an average molecular weight between about 10,000 to about 5,000,000.
77 . The method of claim 61 , wherein the synthetic co-polymer is water soluble or water dispersible.
78 . The method of claim 68 , wherein the dried tissue sheet has a Wet Out Time of about 180 seconds or less.
79 . The method of claim 66 , wherein the dried tissue sheet has a basis weight of about 5 to about 100 g/m 2 , and a bulk of about 2 cm 3 /g or higher.
80 . The method of claim 79 , wherein the dried tissue sheet has a bulk of about 4 cm 3 /g or greater.Join the waitlist — get patent alerts
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