EP 4165246 A1 20230419 - SUPPORT LAYER FOR A RELEASE LINER
Title (en)
SUPPORT LAYER FOR A RELEASE LINER
Title (de)
TRÄGERSCHICHT FÜR EINE TRENNSCHICHT
Title (fr)
COUCHE DE SUPPORT POUR UNE PELLICULE DE PROTECTION
Publication
Application
Priority
- FI 20205625 A 20200615
- FI 2021050436 W 20210610
Abstract (en)
[origin: WO2021255326A1] The invention relates to a method and a substrate.The method comprises providing a coating layer comprising polyvinyl alcohol derivative on a paper; applying a first coating on a first side of the paper to obtain a first coating layer having a coat weight between 0.6 g/m2 and 5 g/m2 as a dry weight of the first coating layer; applying a second coating comprising polyvinyl alcohol derivative on the first coating layer in an indirect, contactless coating method for obtaining a second coating layer having a coat weight in a range of 3 mg/m2 to 200 mg/m2 as a dry weight of the polyvinyl alcohol derivative, wherein the second coating is applied as an aqueous solution having a temperature of less than 90°C and containing polyvinyl alcohol derivative, which has a degree of hydrolysis in the range of 60% to 100% and contains pendant vinyl groups being part of catenated carbon structures containing at least 4 carbon atoms covalently bound to the polyvinyl alcohol derivative.
IPC 8 full level
D21H 19/22 (2006.01); D21H 19/60 (2006.01); D21H 19/82 (2006.01); D21H 23/34 (2006.01); D21H 23/56 (2006.01); D21H 27/00 (2006.01)
CPC (source: EP FI)
C09D 129/04 (2013.01 - FI); C09J 7/21 (2017.12 - FI); C09J 7/401 (2017.12 - FI); D21H 19/12 (2013.01 - FI); D21H 19/22 (2013.01 - EP); D21H 19/60 (2013.01 - EP); D21H 19/82 (2013.01 - EP FI); D21H 23/34 (2013.01 - EP); D21H 23/56 (2013.01 - EP); D21H 27/001 (2013.01 - EP FI); D21H 27/06 (2013.01 - FI)
Citation (search report)
See references of WO 2021255333A1
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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021255326 A1 20211223; EP 4165246 A1 20230419; FI 20205625 A1 20211216; WO 2021255333 A1 20211223
DOCDB simple family (application)
FI 2020050597 W 20200917; EP 21734881 A 20210610; FI 20205625 A 20200615; FI 2021050436 W 20210610