Furnish pretreatment to improve paper strength aid performance in papermaking
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D21H-021/18
D21H-011/14
D21H-023/14
D21H-017/37
출원번호
US-0399253
(2012-02-17)
등록번호
US-8882964
(2014-11-11)
우선권정보
CN-2011 1 0382058 (2011-11-25)
발명자
/ 주소
Zhao, Yulin
Li, Jun
Rao, Qing Long
Cheng, Weiguo
출원인 / 주소
Nalco Company
대리인 / 주소
Carlsen, Benjamin E.
인용정보
피인용 횟수 :
9인용 특허 :
20
초록▼
The invention is directed towards methods, compositions, and apparatus for increasing the strength of paper made out of a furnish having a large proportion of OCC. The method involves the following steps: 1) Providing a paper furnish having a large amount of OCC in it, 2) adding strength promoter to
The invention is directed towards methods, compositions, and apparatus for increasing the strength of paper made out of a furnish having a large proportion of OCC. The method involves the following steps: 1) Providing a paper furnish having a large amount of OCC in it, 2) adding strength promoter to the furnish prior to adding a strength agent to the furnish, 3) adding a strength agent to the furnish, and 4) making a paper product from the furnish. This method allows cheap OCC material to be used in a papermaking process without the quality problems that the anionic trash in OCC typically causes. Thus paper products having low costs and high quality can be produced.
대표청구항▼
1. A method of increasing the strength of a paper product comprising: a. adding a strength promoter to a furnish prior to adding a strength agent to the furnish, wherein the strength promoter comprises an acrylamide/diallyldimethylammonium chloride (“AcAm/DADMAC”) copolymer, the fibers in the furnis
1. A method of increasing the strength of a paper product comprising: a. adding a strength promoter to a furnish prior to adding a strength agent to the furnish, wherein the strength promoter comprises an acrylamide/diallyldimethylammonium chloride (“AcAm/DADMAC”) copolymer, the fibers in the furnish comprising at least 10% fibers sourced from old corrugated cardboard,b. adding a strength agent to the furnish, the strength agent comprising glyoxylated polyacrylamide the dosage ratio of strength promoter relative to strength agent is between 0.1:3 and 0.1:6 wherein the strength agent is dosed relative to the furnish at a dosage of between 3-6 kg/ton, andc. making a paper product using the furnish according to a papermaking process. 2. The method of claim 1, wherein the strength promoter is added in an amount of from about 0.01 to about 3 lb/ton of the furnish. 3. The method of claim 1, wherein the strength promoter has Reduced Specific Viscosity of from about 0.5 to about 15. 4. The method of claim 3, wherein the strength promoter has Reduced Specific Viscosity of from about 1 to about 12. 5. The method of claim 4, wherein the strength promoter has Reduced Specific Viscosity of from about 2 to about 8. 6. The method of claim 5, wherein the strength promoter has Reduced Specific Viscosity of from about 3 to about 6. 7. The method of claim 1, wherein the furnish further comprises fibers selected from the group consisting of recycled fibers, mechanic fibers, and combinations thereof. 8. The method of claim 1, wherein the strength agent is a dry strength agent. 9. The method of claim 1, wherein the strength agent further comprises a compound selected from the group consisting of starch, polyacrylamide, and combinations thereof. 10. The method of claim 1 wherein the fibers in the furnish consist essentially of fibers sourced from old corrugated cardboard. 11. The method of claim 1, wherein the AcAm/DADMAC copolymer has a weight average molecular weight of from about 800,000 to about 3,000,000 daltons. 12. A method of increasing the strength of a paper product-comprising: a. adding a strength promoter to a furnish prior to adding a strength agent to the furnish, wherein the strength promoter comprises an acrylamide/diallyldimethylammonium chloride (“AcAm/DADMAC”) copolymer, the fibers in the furnish comprising at least 10% fibers sourced from old corrugated cardboard,b. adding a strength agent to the furnish, the strength agent comprising glyoxylated polyacrylamide the dosage ratio of strength promoter to strength agent is 0.1:6, the strength agent is dosed relative to the furnish at a dosage of between 3-6 kg/ton, andc. making a paper product using the furnish according to a papermaking process.
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이 특허에 인용된 특허 (20)
St. John, Michael R.; Zagala, Angela P., Aldehyde-functionalized polymers.
Hagiopol, Cornel; Luo, Yuping; Townsend, David F.; Johnston, James W.; Ringold, Clay E.; Favors, Karla D., Blends of glyoxalated polyacrylamides and paper strengthening agents.
Ballweber Edward G. (Glenwood IL) Jansma Roger H. (Park Forest IL) Phillips Kenneth G. (River Forest IL), Cationic polymeric composition for imparting wet and dry strength to pulp and paper.
Underwood Richard T. (Columbus GA) Jasion Robert J. (Columbus GA) Hoke Stephen P. (Columbus GA) Spence Gavin G. (Columbus GA), Method for imparting strength to paper.
Wong Shing, Jane B.; Gray, Ross T.; Zelenev, Andrei S.; Chen, Jiwei, Method of improving retention and drainage in a papermaking process using a diallyl-N,N-disubstituted ammonium halide-acrylamide copolymer and a structurally modified cationic polymer.
Ballweber Edward G. (Glenwood IL) Jansma Roger H. (Park Forest IL) Phillips Kenneth G. (River Forest IL), Paper fiber additive containing polyacrylamide blended with glyoxal and polymeric diallyldimethyl ammonium chloride as a.
Wong Shing Jane B. ; Hurlock John R. ; Maltesh Chidambaram ; Nagarajan Ramasubramanyam, Papermaking process utilizing hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide as retention and drainage aids.
Van Luu Phuong ; Worry Gary ; Marinack Robert J. ; Ostrowski Henry S. ; Bhat Dinesh M., Prewettable high softness paper product having temporary wet strength.
Cyr, Shane; Bakker, Henk; Stevels, Willem Marinus; Staib, Ronald Richard, Reactive cationic resins for use as dry and wet strength agents in sulfite ion-containing papermaking systems.
Castro, David J.; Lowe, Robert M.; Liu, Mei, Method of increasing paper bulk strength by using a diallylamine acrylamide copolymer in a size press formulation containing starch.
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