US4277529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of lightweight tissue paper
Assignee: JPMorgan Chase Bank NA
•
Filing: 1978-02-01
•
Granted: 1981-07-07
•
Expires: 1998-02-01
Abstract
Abstract There is disclosed bonded lightweight tissue paper having improved wet and dry tensile strength and excellent softness and absorbency. The paper is produced by a process which comprises applying a binder composition to a dry web of lightweight soft and absorbent tissue paper, wherein the binder composition comprises an aqueous mixture containing a cross-linkable latex, a cross-linking agent, urea, and a specific combination of inorganic salts.
Inventors
- 👤 Norman J. Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/36; D21H17/38; D21H17/39; D21H17/41; D21H17/42; D21H17/43; D21H17/46; D21H17/47; D21H17/49; D21H17/51; D21H17/63; D21H17/66; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
Process for bonding lightweight, soft, and absorbent tissue paper to improve both wet and dry tensile strength while retaining softness and absorbency, which process comprises the steps of: (a) applying an aqueous composition containing a curable resin binder to a dry web of lightweight, soft, and absorbent tissue paper; and (b) subjecting the product of step (a) to elevated temperature to cure said resin binder and evaporate the water from said aqueous composition, wherein said aqueous composition contains: (i) at least one polymer in latex form, said polymer being capable of self-crosslinking, or said polymer being capable of cross-linking by reacting with an aminoplast resin; (ii) an aminoplast resin, said aminoplast resin being heat-curable, wherein the rate of cure of said aminoplast resin is acceleratable in the presence of acid; (iii) urea; (iv) diammonium phosphate; and (v) ammonium bromide.
Claim 2
Dependent Claim
139 words
Process for bonding lightweight, soft, and absorbent tissue paper to improve both wet and dry tensile strength while retaining softness and absorbency, which process comprises the steps of: (a) applying an aqueous composition containing a curable resin binder to a dry web of lightweight, soft, and absorbent tissue paper; and (b) subjecting the product of step (a) to elevated temperature to cure said resin binder and evaporate the water from said aqueous composition, wherein said aqueous composition contains: (i) at least one polymer in latex form, said polymer being capable of self-crosslinking, or said polymer being capable of cross-linking by reacting with an aminoplast resin; (ii) an aminoplast resin, said aminoplast resin being heat-curable, wherein the rate of cure of said aminoplast resin is acceleratable in the presence of acid; (iii) urea; (iv) diammonium phosphate; and (v) ammonium bromide.
Claim 3
Dependent Claim
18 words
Process of claim 1 wherein said aqueous composition is applied to said paper in an intermittent print pattern.
Claim 4
Dependent Claim
12 words
Process of claim 2 wherein said aminoplast resin is a melamine/formaldehyde resin.
Claim 5
Dependent Claim
30 words
Process of claim 2 wherein said polymer in latex form is a mixture of a carboxylated styrene/butadiene polymer and an ethylene/vinyl acetate polymer containing a small proportion of copolymerized N,N-dimethylolacrylamide.
Claim 6
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 7
Dependent Claim
9 words
The product produced by the product of claim 2.
Claim 8
Dependent Claim
9 words
The product produced by the process of claim 3.
Claim 9
Dependent Claim
9 words
The product produced by the process of claim 4.
References Cited (Backward Citations)
US2526462A
Cited
US2784159A
Cited
US2931742A
Cited
US2867549A
Cited
US2994620A
Cited
US2935471A
Cited
US3262838A
Cited
US3310459A
Cited
US3880792A
Cited
US3365414A
Cited
US3719628A
Cited
USRE28957E
Cited
US3883463A
Cited
US3936542A
Cited
US3922244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |