摘要:
The invention relates to a security document (1) which includes: a paper substrate (2) including a sheet having a first surface and a second surface; a first film made of a polymer material (3) extending over the first surface of the paper substrate (2); and a second film made of a polymer material (4) extending over the second surface of the paper substrate (2), in which the paper substrate (2) is impregnated on at least one of the surfaces thereof with a composition forming an impregnation of polyurethane (23), and in which the paper substrate adheres to at least one of the films made of a polymer material by means of a layer of adhesive including a vinyl acetate-ethylene copolymer which has a weight percentage of vinyl acetate higher than 23 wt %.
摘要:
The invention relates to a security document, such as a bank note (17), comprising: a substrate comprising a sheet of paper (6) having a first face (7) and a second face (8); a first film (14) consisting of a polymer material extending over the first face (7); and a second film (15) consisting of a polymer material extending over the second face (8); wherein the sheet of paper (6) comprises a fibre matrix (5) and at least one wet-strength agent, the wet-strength agent being preferably selected from the group consisting of a polyamidoamine-epychlorohydrin (PAE) resin, a urea-formaldehyde (UF) resin, a formaldehyde resin and one of the derivatives thereof, with an agent dry weight/fibre dry weight ratio higher than or equal to 2.3%.
摘要:
The invention relates to a method for producing a security document, such as a bank note, comprising successive steps of: laminating a paper substrate having a grammage lower than or equal to 90 grams per square metre so as to reduce the thickness of the substrate, the substrate being a sheet or a web of paper; if the substrate is a web of paper, cutting the substrate into a plurality of separate sheets of paper; and applying at least one film of a polymer material to at least one face of the or each sheet of paper.