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1. (WO1992009745) PAPER AND A METHOD OF PAPER MANUFACTURE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/009745 International Application No.: PCT/SE1991/000798
Publication Date: 11.06.1992 International Filing Date: 25.11.1991
Chapter 2 Demand Filed: 10.04.1992
IPC:
D21H 17/00 (2006.01) ,D21H 21/14 (2006.01)
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
17
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
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
21
Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper impregnating or coating material, characterised by its function, form or properties
14
characterised by function or properties in or on the paper
Applicants:
MO OCH DOMSJÖ AKTIEBOLAG [SE/SE]; S-891 80 Örnsköldsvik, SE (AllExceptUS)
AGNEMO, Arne, Roland [SE/SE]; SE (UsOnly)
Inventors:
AGNEMO, Arne, Roland; SE
Agent:
JONSSON, Per-Erik; Mo och Domsjö Aktiebolag S-891 80 Örnsköldsvik, SE
Priority Data:
9003830-803.12.1990SE
Title (EN) PAPER AND A METHOD OF PAPER MANUFACTURE
(FR) PAPIER ET PROCEDE DE FABRICATION DU PAPIER
Abstract:
(EN) The present invention reduces the normally marked yellowing of paper which is at least partially based on lignin-containing pulps. The invention relates to paper produced from fibre material and other paper ingredients in the form of at least one chemical. The fibre material at least partially consists of pulp that contains lignin in an amount exceeding 0.5 percent by weight, and is characterized in that the paper includes a) an acid and/or a corresponding salt of general formula (I) (the acid form) where R1 = -CHOHCH2OH or -CHOHCOOH in an amount of at least 0.05 percent by weight, calculated on the fibre material; and b) a reduction agent in an amount of at least 0.05 percent by weight, calculated on the fibre material. The invention relates also to a method for manufacturing such a paper.
(FR) L'invention décrite permet de réduire le jaunissement marqué d'un papier au moins partiellement basé sur des pâtes à papier contenant de la lignine. L'invention concerne un papier réalisé à partir d'une matière fibreuse et d'autres ingrédients de papier réprésentés par au moins un produit chimique. La matière fibreuse est composée au moins partiellement d'une pâte contenant de la lignine en une quantité supérieure à 0.5 % en poids, et est caractérisée en ce que ledit papier comprend a) un acide et/ou un sel correspondant de formule générale (I) (forme acide), où R1 = -CHOHCH2OH ou -CHOHCOOH, dont la quantité représente au moins 0.05 % en poids de la matière fibreuse; et b) un agent réducteur dont la quantité représente au moins 0.05 % en poids de la matière fibreuse. L'invention concerne également un procédé de fabrication dudit papier.
Designated States: CA, FI, JP, NO, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
FI932508NO19932011ES2068613EP0561828US5368689JP2987642
JPH06503126CA2096738DE000069107627DK0561828