Abstract: The invention relates to a process for manufacturing a laminated material (S) comprising a fibrillated cellulose layer, characterized in that it comprises the following steps: (a) depositing a suspension (1) of fibrillated cellulose on a filtration membrane (2) and draining the suspension through that membrane so as to form a wet layer of fibrillated cellulose (A) having a dryness, that is to say a ratio between the mass of dry matter and the total mass of the fibrillated cellulose layer, of between 5% and 18%; (b) transferring the wet layer (A) under pressure to an at least partially hydrophilic surface of a substrate (B), so as to form the laminated material (S); (c) drying the laminated material. The invention also relates to a device for implementing the process.
Type:
Grant
Filed:
April 27, 2016
Date of Patent:
April 14, 2020
Assignees:
CENTRE TECHNIQUE DU PAPIER, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
Inventors:
David Guerin, Yahia Rharbi, Patrick Huber, Valérie Meyer
Abstract: The invention relates to a machine for chromatogenous grafting treatment of a scrolling substrate (S) having a hydroxylated face (Fh), comprising: an application device (3) of a grafting reagent on the hydroxylated face (Fh) of the substrate, a heating roller (4) for the development of the grafting reaction on the hydroxylated face (Fh) of the substrate, said roller (4) being provided with a bar-end system (5a, 5b) for applying a face of the substrate (S) against said heating roller (4), an extraction device (6) of the hydrochloric acid produced during the grafting reaction, an application device (7) of an air knife on the treated face of the substrate for eliminating the residual grafting reagent. The invention also relates to a chromatogenous grafting process used in said machine.
Type:
Grant
Filed:
November 16, 2011
Date of Patent:
February 19, 2019
Assignees:
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), CENTRE TECHNIQUE DU PAPIER
Inventors:
Daniel Samain, David Guerin, André Lemaitre, Laurent Lyannaz, Jean-Luc Guillouty
Abstract: The invention relates to a process for manufacturing a laminated material (S) comprising a fibrillated cellulose layer, characterized in that it comprises the following steps: (a) depositing a suspension (1) of fibrillated cellulose on a filtration membrane (2) and draining the suspension through that membrane so as to form a wet layer of fibrillated cellulose (A) having a dryness, that is to say a ratio between the mass of dry matter and the total mass of the fibrillated cellulose layer, of between 5% and 18%; (b) transferring the wet layer (A) under pressure to an at least partially hydrophilic surface of a substrate (B), so as to form the laminated material (S); (c) drying the laminated material. The invention also relates to a device for implementing the process.
Type:
Application
Filed:
April 27, 2016
Publication date:
May 24, 2018
Applicants:
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), CENTRE TECHNIQUE DU PAPIER
Inventors:
David GUERIN, Yahia RHARBI, Patrick HUBER, Valérie MEYER
Abstract: A process for treating a solid substrate coupled to a polyol, wherein said polyol bears free hydroxyl groups, comprising the grafting of at least one fatty acid having an aliphatic chain comprising at least 12 carbon atoms onto said solid substrate coupled to a polyol by esterification of at least one free hydroxyl group of said polyol.
Type:
Grant
Filed:
February 4, 2013
Date of Patent:
March 29, 2016
Assignees:
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), CENTRE TECHNIQUE DU PAPIER
Inventors:
Daniel Samain, Camélia Stinga, David Guerin, Markus Schmid, Klaus Noller