Fibers and pulps for papermaking based on chemical combination of poly (acrylate-co-itaconate), polyol and cellulosic fi
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D21H-011/20
출원번호
US-0432306
(1995-05-01)
발명자
/ 주소
Barcus Robert Lee (Springfield Township OH) Bjorkquist David William (Wyoming OH)
출원인 / 주소
The Procter & Gamble Company (Cincinnati OH 02)
인용정보
피인용 횟수 :
74인용 특허 :
27
초록▼
Disclosed is a fiber comprising, chemically bonded together, (a) a conventional cellulosic fiber, such as a Kraft fiber or a chemithermomechanical pulp fiber; (b) poly(acrylate-co-itaconate) copolymer, such as the acid form of a poly(acrylate-co-itaconate) copolymer comprising 90-95 mole % acrylate
Disclosed is a fiber comprising, chemically bonded together, (a) a conventional cellulosic fiber, such as a Kraft fiber or a chemithermomechanical pulp fiber; (b) poly(acrylate-co-itaconate) copolymer, such as the acid form of a poly(acrylate-co-itaconate) copolymer comprising 90-95 mole % acrylate and 5-10 mole % itaconate having weight average molecular weight of about 600,000-900,000; and (c) a polyol, such as polyethylene glycol; also disclosed are methods for making such fibers, especially evaporatively depositing an intimate mixture of the copolymer and polyol on the fiber followed by thermally crosslinking at specific temperatures for limited periods; absorbent paper which can be made by wet-laying the fiber, especially in admixture with conventional fiber; and derivative paper structures, such as multi-ply disposable absorbent towels.
대표청구항▼
A process for preparing a chemically modified fiber having a water absorbency and retention value in the range from 15 g/g to about 130 g/g comprising a step of: thermally crosslinking, at a curing temperature of from about 100°C. to about 150°C. for a curing time of from about 60 minutes to about 2
A process for preparing a chemically modified fiber having a water absorbency and retention value in the range from 15 g/g to about 130 g/g comprising a step of: thermally crosslinking, at a curing temperature of from about 100°C. to about 150°C. for a curing time of from about 60 minutes to about 2 minutes, (a) a starting-material pulp consisting essentially of cellulosic fiber selected from the group consisting of chemithermomechanical pulp fiber, bleached hardwood Kraft pulp fiber, bleached softwood Kraft pulp fiber, unbleached hardwood Kraft pulp fiber, unbleached softwood Kraft pulp fiber, bleached softwood sulfite pulp fiber, unbleached softwood sulfite pulp fiber, cotton linters, mercerized dissolving pulp fiber, unmercerized dissolving pulp fiber, and mixtures thereof with an intimate mixture of: (b) a poly(acrylate-co-itaconate) copolymer having a weight average molecular weight in the range from about 60,000 to about 1,000,000, an acrylate content of from about 50 mole % to about 99 mole % and an itaconate content of from about 1 mole % to about 50 mole %; and (c) a polyol; wherein the proportion by weight of said poly(acrylate-co-itaconate) copolymer to said polyol is from about 250:1 to about 3:1 and the weight of said poly(acrylate-co-itaconate) copolymer plus said polyol per unit weight of said cellulosic fiber, (a), is in the range from about 0.3 to about 2, the poly(acrylate-co-itaconate) copolymer weight being expressed on an acid equivalent basis.
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