EP 3938575 B1 20230705 - INCREASED PAPER STRENGTH BY SURFACE TREATMENT
Title (en)
INCREASED PAPER STRENGTH BY SURFACE TREATMENT
Title (de)
ERHÖHTE PAPIERFESTIGKEIT DURCH OBERFLÄCHENBEHANDLUNG
Title (fr)
AUGMENTATION DE LA RESISTANCE DU PAPIER PAR TRAITEMENT DE SURFACE
Publication
Application
Priority
- FR 1902634 A 20190314
- EP 2020056774 W 20200313
Abstract (en)
[origin: WO2020182977A1] The invention relates to a method for treating the surface of paper, and/or at least one of the layers thereof, which comprises the following consecutive steps: i) supplying an aqueous suspension S of polysaccharide, ii) supplying an aqueous dispersion D comprising (a) particles of at least one anionic water-swellable polymer P and (b) at least one compound selected from a mineral salt, an organic salt, an organic dispersing polymer and the mixtures thereof, iii) mixing the suspension S and the dispersion D, to obtain a mixture M, and iv) applying the mixture M to the surface of the paper and/or of the layers thereof.
IPC 8 full level
D21H 17/37 (2006.01); D21H 17/00 (2006.01); D21H 17/24 (2006.01); D21H 17/66 (2006.01); D21H 21/18 (2006.01)
CPC (source: EP KR US)
D21H 5/0047 (2013.01 - KR); D21H 17/24 (2013.01 - EP KR); D21H 17/37 (2013.01 - EP KR); D21H 17/375 (2013.01 - EP KR); D21H 17/42 (2013.01 - KR); D21H 17/66 (2013.01 - EP KR); D21H 17/71 (2013.01 - EP KR); D21H 17/72 (2013.01 - EP KR); D21H 17/74 (2013.01 - EP KR); D21H 19/12 (2013.01 - US); D21H 21/18 (2013.01 - EP KR); D21H 21/20 (2013.01 - US); D21H 23/34 (2013.01 - KR); D21H 23/48 (2013.01 - KR); D21H 23/56 (2013.01 - KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2020182977 A1 20200917; BR 112021018153 A2 20211116; CA 3132084 A1 20200917; CN 113557331 A 20211026; EP 3938575 A1 20220119; EP 3938575 B1 20230705; EP 3938575 B8 20230809; FI 3938575 T3 20230927; FR 3093738 A1 20200918; FR 3093738 B1 20210402; KR 20210138605 A 20211119; US 11781271 B2 20231010; US 2022162803 A1 20220526
DOCDB simple family (application)
EP 2020056774 W 20200313; BR 112021018153 A 20200313; CA 3132084 A 20200313; CN 202080020624 A 20200313; EP 20709236 A 20200313; FI 20709236 T 20200313; FR 1902634 A 20190314; KR 20217029481 A 20200313; US 202017437496 A 20200313