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1. (WO1997015722) MULTILAYER COATING USING AN APPLICATION ROLLER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/015722 International Application No.: PCT/US1996/014950
Publication Date: 01.05.1997 International Filing Date: 18.09.1996
Chapter 2 Demand Filed: 26.04.1997
IPC:
B05C 1/08 (2006.01) ,D21H 23/56 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
05
SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
C
APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
1
Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
04
for applying liquid or other fluent material to work of indefinite length
08
using a roller
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
23
Processes or apparatus for adding material to the pulp or to the paper
02
characterised by the manner in which substances are added
22
Addition to the formed paper
52
by contacting paper with a device carrying the material
56
Rolls
Applicants:
MINNESOTA MINING AND MANUFACTURING COMPANY [US/US]; 3M Center P.O. Box 33427 Saint Paul, MN 55133-3427, US
Inventors:
BAYER, Glen, H., Jr.; US
O'LEARY, Timothy, J.; US
Agent:
HUEBSCH, William, L. ; Minnesota Mining and Manufacturing Company Office of Intellectual Property Counsel P.O. Box 33427 Saint Paul, MN 55133-3427, US
HILLERINGMANN, Jochen; Bahnhofsvorplatz 1 Deichmannhaus D-50667 Köln, DE
Priority Data:
08/548,89726.10.1995US
Title (EN) MULTILAYER COATING USING AN APPLICATION ROLLER
(FR) REVETEMENT MULTICOUCHES APPLIQUE AU ROULEAU
Abstract:
(EN) A method of applying a coating of hot melt polymeric material from a die to a substrate. Hot melt polymeric material is extruded through the die onto the peripheral surface of a rotating application roller to provide a coating layer along that peripheral surface. A substrate is conveyed past the peripheral surface of the application roller at an application interface to cause transfer of the first coating layer to the substrate and shearing and thinning of the coating layer because the substrate is conveyed faster that the peripheral speed of the application roller. The velocity of the peripheral surface and spacing between the die and the application interface along are selected to provide a time inteval of at least 0.12 second for movement of portions of the coating layer from the die to the application interface, thereby affording relaxation and molecular reorientation of the hot melt polymeric material after the extruding step to facilitate shearing of the first coating layer at the application interface without causing ribbing or breaking of the coating layer.
(FR) La présente invention concerne un procédé d'application d'un polymère thermofusible, provenant d'une filière, sur un support. Ce polymère thermofusible est extrudé par la filière sur la surface extérieure d'un rouleau applicateur en rotation, pour donner une couche de revêtement sur cette surface. On fait passer un substrat devant elle, au niveau d'une interface d'application, pour obtenir le transfert de la première couche du revêtement sur le substrat ainsi que la coupe et l'amincissement de cette couche du fait que le substrat est déplacé à une vitesse supérieure à la vitesse périphérique du rouleau applicateur. La vitesse de la surface extérieure et l'espacement entre la filière et l'interface d'application sur cette surface sont choisis de manière à donner un intervalle de temps d'au moins 0,12 seconde pour le déplacement de parties de la couche de revêtement depuis la filière jusqu'à l'interface d'application, ce qui donne un relâchement et une réorientation moléculaire du polymère thermofusible après l'extrusion, pour faciliter la coupe de la première couche à l'interface d'application sans provoquer la formation d'ondulations ou la rupture de la couche de revêtement.
Designated States: AU, CA, JP, KR, MX
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:
MXPA/a/1998/003153EP0857234JPH11514295 CA2234849KR1019990066975AU1996070755