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1. (WO1998049396) IMPROVING LAY FLAT PROPERTIES OF PRINTING PAPER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/049396 International Application No.: PCT/US1998/004516
Publication Date: 05.11.1998 International Filing Date: 06.03.1998
Chapter 2 Demand Filed: 23.11.1998
IPC:
B41M 5/00 (2006.01) ,B41M 5/52 (2006.01) ,D21H 19/12 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
M
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
5
Duplicating or marking methods; Sheet materials for use therein
B PERFORMING OPERATIONS; TRANSPORTING
41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
M
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
5
Duplicating or marking methods; Sheet materials for use therein
50
Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
52
Macromolecular coatings
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
19
Coated paper; Coating material
10
Coatings without pigments
12
applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
Applicants:
INTERNATIONAL PAPER COMPANY [US/US]; 2 Manhattanville Road Purchase, NY 10577-2196, US
Inventors:
FRANK, Benjamin; US
KARLES, Georgios, D.; US
Agent:
GRAHAM, Mark, S.; Luedeka, Neely & Graham, P.C. P.O. Box 1871 Knoxville, TN 37901 , US
Priority Data:
08/847,69528.04.1997US
Title (EN) IMPROVING LAY FLAT PROPERTIES OF PRINTING PAPER
(FR) PROCEDE PERMETTANT D'AMELIORER LA CAPACITE DU PAPIER D'IMPRESSION A RESTER A PLAT
Abstract:
(EN) The specification discloses a method for improving the lay flat properties of paper which comprises applying to a cellulosic fibrous web an aqueous solution consisting essentially of a dialdehyde, preferably glyoxal, and from about 50 to about 150 parts by weight of a polyol, preferably glycerol, per 100 parts of the dialdehyde and then drying the web at a temperature sufficient to cure the glyoxal and polyol. The concentration of dialdehyde and polyol in the solution is sufficient to provide a combined total of from about 0.1 to about 10 weight percent dialdehyde and polyol in the web based on the oven-dry weight of the paper. The solution is preferably applied in a papermaking process at or after the wet press and prior to treating the web with chemicals having free hydroxyl groups which may react with the dialdehyde.
(FR) L'invention concerne un procédé permettant d'améliorer la capacité du papier à rester à plat, selon lequel une solution aqueuse comprenant essentiellement un dialdéhyde, de préférence du glyoxal, et entre environ 50 et 150 parties en poids d'un polyol, de préférence du glycérol, pour 100 parties de dialdéhyde est appliquée sur une bande fibreuse cellulosique. La bande est ensuite séchée à une température permettant de durcir le glyoxal et le polyol. La concentration en dialdéhde et en polyol dans la solution suffit à fournir un total combiné d'environ 0,1 à 10 % en poids de dialdéhyde et polyol dans la bande sur la base du poids anhydre du papier. La solution est appliquée de préférence dans le cadre d'un processus de fabrication de papier, pendant ou après le pressage humide et avant le traitement de la bande avec des produits chimiques présentant des groupes hydroxyle libres susceptibles de réagir au dialdéhyde.
Designated States: CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0991813JP2001522415 CA2287421