TH46274A - Safety assurance document printed on the core layer. - Google Patents

Abstract

DC60 (01/12/42) A multi-layered, laminated film backing material for banknote production, featuring a core of laminated polypropylene with printing characteristics and at least one layer of high-density polyethylene on each side of the laminated polypropylene layer. The film exhibits excellent embossing capabilities, good folding properties, and other characteristics, making it highly resistant to counterfeiting. This makes it ideal for the production of banknotes and other security documents.

Claims (21)

1. A symmetrical, cross-sectional laminated multilayer film backing material resistant to bending, for use in the production of banknotes, security documents and similar items, consisting of: (a) a biaxially asymmetrical, unprinted, inner and outer primary layer consisting of at least 50 percent by weight of high-density polyethylene with a density of at least 0.94; the primary layer is minimally asymmetrical in one direction to a level at least three times less than the asymmetrical level in the second direction perpendicular to the primary direction; (b) a biaxially asymmetrical, inner and outer secondary layer with a tensile strength greater than 18,000 psi, which includes at least one printed outer layer; the secondary layer is minimally asymmetrical in the primary direction with an asymmetrical ratio of at least 4:1 and is asymmetrical in the second direction perpendicular to the primary direction. (c) a third layer of material, asymmetrically aligned in two axes, unprinted, in which the initial tear resistance ratio is greater than 10:1, with an inner and outer layer consisting of at least 50 percent by weight of high-density polyethylene with a density of at least 0.94; the third layer of material is aligned at least in the first direction to a level at least three times less than the level of alignment present in the second direction, which is perpendicular to the first direction; and (d) an adhesive resin layer provided between the inner side of (a) and (c), the second layer of material is extruded onto the first and third layers of material in such a way that the first direction of alignment of the third layer of material is aligned with the first direction of alignment of the first layer of material, and in which (a) has an additional layer consisting of a co-extruded propylene copolymer skin layer on the inner side of (a). 2. The film layer of claim 1, to which a second layer consists of polypropylene and/or polyester. 3. The film substrate material of claim 1 results in a gloss measurement at 45 degrees of less than 85 percent. 4. The film backing material of claim 1, which (a) is embossed on the surface. 5. The film backing material of claim 1, which (a) and (c) are embossed on the surface. 6. The film substrate of claim 1, which (a) has micropores in oblique and/or unidirectional directions. 7. A film substrate of claim 6 with a micropore size ranging from 50 to 300 dots per inch. 8. The film substrate of claim 1, which (a) and (c) have micropores in oblique and/or unidirectional directions. 9. The film substrate of claim 1, which both (a) and (c) have an additional layer consisting of a polypropylene copolymer skin layer on at least one side of those layers. 10. The film backing material of claim 1, which (d) consists of a solvent-free adhesive. 11. The film backing material of claim 10, which (d) consists of polyurethane. 12. The film backing material of claim 1, which (d) consists of a selectable composition from a group of low-density polyethylene (LDPE) and straight-chain low-density polyethylene (LLDPE). 13. The film backing material of claim 1, which includes additional components consisting of (e) a safety device between (a) and (c). 14. The film substrate material of claim 11, from which the security device can be selected, is a group comprising optically changeable devices (OVDs), magnetic devices, electronic devices, and devices containing rare earth elements. 15. The film backing material of claim 1, which includes additional components consisting of (e) a safety device printed on the layer (b) before being extruded with an adhesive resin (d). 16. The supporting film material of claim 9, on which the outer surface is a polypropylene polymer leather, is externally coated with an opaque coating. 17. The film substrate of claim 13, which includes an additional component consisting of a transparent window through which one can see through the film substrate. 18. The supporting material is a film of claim 1 in the form of a banknote. 19. The supporting film material of Reputation 1, where the first direction is the directional direction (MD) and the second direction is the transverse direction (TD). 20. A multi-layered, symmetrically laminated, bend-resistant film backing material for use in the production of banknotes, security documents, and similar items, consisting of: (a) a primary layer, asymmetrically laminated in two axes, unprinted, with an inner and outer side, consisting of at least 50 percent by weight of high-density polyethylene with a density of at least 0.94; the primary layer is minimally laminated in one direction to a level at least three times less than the level of lamination present in the second direction perpendicular to the primary direction; (b) a secondary layer, asymmetrically laminated in two axes, with an inner and outer side, and a tensile strength greater than 18,000 psi, which includes at least one printed outer side; the secondary layer is laminated at least in the primary direction with a lamination ratio of at least 4:1 and laminated in the second direction perpendicular to the primary direction with a level of at least 4:1. (c) A third layer of material, asymmetrically aligned in two axes, unprinted, with an inner and outer layer composed of at least 50 percent by weight of high-density polyethylene with a density of at least 0.94; the third layer is minimally aligned in the first direction to a degree greater than the degree of alignment present in the second direction, which is considered perpendicular to the transverse direction of the machine; and (d) an extruded adhesive resin layer provided between the inner side of (a) and (c), the second layer is extruded into the first and third layers in such a way that the first direction of alignment of the third layer is aligned with the first direction of alignment of the first layer, and which (a) has an additional layer of extruded propylene copolymer skin layer on the inner side of (a). 21. A multi-layer, symmetrically bonded, bend-resistant film backing material for use in the production of banknotes, security documents, and similar items, consisting of: (a) a primary, unprinted layer consisting of an inner and outer layer of unblended low-density polyethylene with a density of at least 0.94 in at least 50 percent by weight; (b) a secondary layer consisting of an inner and outer layer with a tensile strength greater than 18,000 psi, in which the secondary layer contains a significant printing feature on at least one outer side, the secondary layer is aligned in at least one direction in the first direction with an aligning ratio of at least 4:1 and aligned in a second direction perpendicular to the machine direction with an aligning ratio of at least 6:1; (c) a third, unprinted layer consisting of an inner and outer layer of high-density polyethylene. (d) an adhesive resin layer provided between the inner side of (a) and (c) in which (a) has an additional layer consisting of a propylene copolymer skin layer extruded on the inner side of (a).