Process for coating paper with copolyester and product...

Details Process for coating paper with copolyester and product... Process for coating paper with copolyester and product...

D - Textiles, Paper

21

H

D21H 19/28 (2006.01) B32B 27/10 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2148497

Disclosed is a method of providing a thin copolyester coating on paper wherein the coating has good peel strength which comprises extruding a film of copolyester onto paper to form a coated sheet and passing the paper through a nip formed by a pair of cooperating chill and pressure rolls, wherein the copolyester consists essentially of repeat units from terephthalic acid, ethylene glycol, about 1.5-20 mol % of an aliphatic or cycloaliphatic glycol having 2 to 10 carbon atoms, and 0 to about 1.0 mol % of a polyfunctional branching agent. Also disclosed is the coated paper prepared by this method.

L'invention concerne un procédé permettant d'appliquer une fine couche de copolyester sur du papier, ladite couche présentant une bonne résistance au pelage. Ledit procédé consiste à extruder une feuille de copolyester et à l'appliquer sur du papier afin d'obtenir une feuille couchée, et à passer le papier dans un cylindre presseur constitué d'une paire de rouleaux refroidisseur et de pression. Le copolyester se compose essentiellement d'unités de répétition d'acide téréphtalique, d'éthylène glycol, environ 1,5 à 20 % en mole de glycol aliphatique ou cycloaliphatique présentant 2 à 10 atomes de carbone, et de 0 à 1,0 % en mole d'agent ramifiant polyfonctionnel. Le papier couché préparé selon ce procédé est également décrit.

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