Paper and paper-like products including water insoluble fibrous

Details Paper and paper-like products including water insoluble fibrous Paper and paper-like products including water insoluble fibrous

1995-11-03

1997-09-16

Chin, Peter

Paper making and fiber liberation

Processes and products

Plural fiber containing

1621576, 1621643, 1621646, 1621682, 162175, D21H 1120

Patent

active

056676379

ABSTRACT:
The invention relates to paper and similar products made with at least a portion of the papermaking furnish being essentially water insoluble carboxyethyl cellulose fibers. A cationic additive material, such as a polyamide epichlorohydrin wet strength resin or cationic starch, is also required. From 2-100% of the modified fiber is used in conjunction with a usual papermaking fiber. The D.S. of the carboxyethylated fiber is in the range of about 0.01-0.3, preferably about 0.025-0.10. A notable feature of paper products made with the fiber/cationic additive system is an improved ratio of wet to dry tensile and burst strengths compared with sheets made from unmodified fiber.

REFERENCES:
Baker, D.L. and O Sepall. A New dimension in papermaking--carboxyethylation. Pulp and Paper Magazine of Canada, pp. T-499 to T-455 (Sep. 1965).
Burova, T.S., N. A. Guseinova, A. S. Bokova, and N. F. Gracheva. Carboxyethylation of cellulose and investigation of the properties of the resulting ether. Leningrad Tekhnol. Inst. Tsellyul.-Bumazh. Prom. No 30, pp. 61-70 (1970). (Translation).
Kapustova, J. and A. Letenay. Modification of paper properties by the use of chemically modified pulps. Papir Celuloza 25 (6): 171-174 (1970). (Abstract from Abstract Bulletin of the Institute of Paper Chemistry 41:6461 (1971)).
Letenay, A. Chemically modified pulps for papermaking. Sb. Vyskum. Prac. Odboru Papiera Celulozy 13: 81-90 (1968). (Abstract from Abstract Bulletin of the Institute of Paper Chemistry 40:5749 (1970)).
Neogi, A. N. and Jon R. Jensen. Wet strength improvement via fiber surface modification. Tappi 63 (8): 86-88 (1980).
Walecka, Jerrold A. An investigation of low degree of substitution carboxymethylcelluloses. Tappi 39 (7):458-463 (1956).
Ward, Jr., Kyle. Chemical modification of papermaking fibers, pp. 86-103 and 108-114, Marcel Dekker, New York (1973).
W.ang.gberg, Lars and Mirjam Bjorkland. On the mechanism behind wet strength development in papers containing wet strength resins. Nordic Pulp and Paper Research Journal, No. 1, pp. 53-58. (1993).

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