Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber
Reexamination Certificate
2005-10-25
2005-10-25
Alvo, Steve (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With chemical or physical modification of liberated fiber
C162S078000, C162S177000, C106S162500
Reexamination Certificate
active
06958108
ABSTRACT:
The present invention relates to a modified fiber product and a method of producing same. According to the method, the cellulosic raw material is formed into a fiber suspension, into which components modifying the properties of the fibers are added, subsequent to which the fibrous material is dried in connection with, for example, web forming. According to the invention, alkyl derivative of cellulose is mixed into the fiber suspension in alkaline conditions, the derivative being at least partly dissolved in water, and the derivative is allowed to be sorbed into the fibrous material prior to drying such that the sorbed cellulose derivative can not be washed off with water. The strength properties or the water retention of paper and paperboard products can be improved by using the invention.
REFERENCES:
patent: 3674621 (1972-07-01), Miyamoto et al.
patent: 3719552 (1973-03-01), Farley et al
patent: 4710270 (1987-12-01), Sunden et al.
patent: 5354424 (1994-10-01), Rha et al.
patent: 5637193 (1997-06-01), Hassi et al.
patent: 6165320 (2000-12-01), Bates et al.
patent: 0 273 075 (1998-07-01), None
patent: 1110004 (1968-04-01), None
patent: 1111165 (1968-04-01), None
patent: 1504128 (1978-03-01), None
patent: 9-132896 (1997-05-01), None
patent: 9-291490 (1997-11-01), None
patent: 10-1897 (1998-01-01), None
patent: WO 96/33310 (1996-10-01), None
Derwent Accession No. 98-603601, UNI-CHARM KK: “Hydrolytic sheet—includes base material sheet of water-dispersive fibre, and carboxyl methyl cellulose and/or its salt; and a liquid component”; & JP, A, 10273892, 981013.
Alvo Steve
Kubovcik & Kubovcik
M-real Oyj
LandOfFree
Method of producing a fiber product having a strength... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of producing a fiber product having a strength..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing a fiber product having a strength... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3463456