The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2015
Filed:
Mar. 28, 2011
Ingrid Geuens, Emblem, BE;
Bart Waumans, Puurs, BE;
Vera Drieghe, Kontich, BE;
Agfa-Gevaert N.V., Mortsel, BE;
Abstract
A method of preparing a security laminate including the steps of: a) providing a polyethylene terephthalate substrate (); b) stretching the polyethylene terephthalate substrate in either a longitudinal or a transversal direction; c) coating and drying a first coating composition () on the stretched polyethylene terephthalate substrate; d) stretching the coated polyethylene terephthalate substrate in the longitudinal or transversal direction not selected in step b) in order to obtain a coated biaxially stretched polyethylene terephthalate substrate having a layer of the first coating composition with a dry thickness between 50 nm and 400 nm; e) coating and drying a second coating composition () on top of the dry layer on the biaxially stretched substrate, wherein the first coating composition contains a copolymer selected from the group consisting of a hydroxyl—functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer and a polyester-urethane copolymer; and wherein the second coating composition contains a hydroxyl—functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer. Security laminates and security documents containing them are also disclosed.