US5698333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer film structures for use in the production of banknotes or the like
Assignee: Mobil Oil AS
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Filing: 1994-06-27
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Granted: 1997-12-16
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Expires: 2014-06-27
Abstract
Abstract A laminated multilayer film substrate for use in the production of banknotes includes a first layer comprises (a) a first layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said first layer being oriented in the transverse direction (TD) to a degree which is at least three times greater than the degree of orientation present in the machine direction (MD); (b) a second layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said second layer oriented in the transverse direction to a degree which is at least three times greater than the degree of orientation present in the machine direction; and (c) a laminating adhesive resin disposed between the inner sides of (a) and (b), which comprises a component selected from the group consisting of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE); said second layer being laminated to said first layer so that the transverse direction of orientation of said second layer is substantially aligned with the transverse direction of orientation of said first layer. The resultant films exhibit good embossability, dead-fold characteristics and other properties, making them highly suited for the production of bank notes and other security documents.
Inventors
- 👤 Gordon L. Benoit
- 👤 Rudolph VanderVelden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:11
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B33/00; B32B7/00; B32B7/02; B32B7/04; B32B7/12; B42; B42D; B42D25/00; B42D25/20; B42D25/29; B32B2250/00; B32B2250/40; B32B2323/00; B32B2323/04; B32B2323/046; B32B2554/00; Y; Y10; Y10S; Y10S283/00; Y10S283/902; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1041; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/24479; Y10T428/24612; Y10T428/24942; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
241 words
A curl-resistant, cross-sectionally symmetrical, laminated multilayer film substrate for use in the production of banknotes, security papers and the like comprising: (a) an imbalanced biaxially oriented first layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said first layer being oriented in at least a first direction to a degree which is at least three times greater than the degree of orientation present in a second direction substantially normal to the first direction; and (b) an imbalanced biaxially oriented second layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said second layer being oriented in at least a first direction to a degree which is at least three times greater than the degree of orientation present in a second direction substantially normal to the first direction; (c) a laminating adhesive resin disposed between the inner sides of (a) and (b), which comprises a component selected from the group consisting of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE); said second layer being laminated to said first layer so that the first direction of orientation of said second layer is substantially aligned with the first direction of orientation of said first layer and wherein (a) further comprises a coextruded propylene copolymer skin on its inner side.
Claim 2
Dependent Claim
241 words
A curl-resistant, cross-sectionally symmetrical, laminated multilayer film substrate for use in the production of banknotes, security papers and the like comprising: (a) an imbalanced biaxially oriented first layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said first layer being oriented in at least a first direction to a degree which is at least three times greater than the degree of orientation present in a second direction substantially normal to the first direction; and (b) an imbalanced biaxially oriented second layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said second layer being oriented in at least a first direction to a degree which is at least three times greater than the degree of orientation present in a second direction substantially normal to the first direction; (c) a laminating adhesive resin disposed between the inner sides of (a) and (b), which comprises a component selected from the group consisting of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE); said second layer being laminated to said first layer so that the first direction of orientation of said second layer is substantially aligned with the first direction of orientation of said first layer and wherein (a) further comprises a coextruded propylene copolymer skin on its inner side.
Claim 3
Dependent Claim
23 words
The film substrate of claim 1 wherein both (a) and (b) further comprise a copolymer polypropylene skin on at least one side thereof.
Claim 4
Dependent Claim
24 words
The film substrate of claim 1 wherein both (a) and (b) further comprise copolymer polypropylene skins on both the inner and outer sides thereof.
Claim 5
Dependent Claim
29 words
The film substrate of claim 3 wherein a primer is provided between the copolymer polypropylene skins on the inner sides of (a) and (b), and the laminating adhesive resin.
Claim 6
Dependent Claim
12 words
The film substrate of claim 4 wherein said primer comprises polyethyleneimide (PEI).
Claim 7
Dependent Claim
16 words
The film substrate of claim 1 wherein (c) comprises an orientable linear low density polyethylene (LLDPE).
Claim 8
Dependent Claim
51 words
The film substrate of claim 2 wherein (c) is of ABA construction, comprising a core layer B of orientable linear low density polyethylene (LLDPE) and layers A of low density polyethylene (LDPE) on either side of said core layer, said copolymer polypropylene skins comprising 10 to 20 wt% low density polyethylene.
Claim 9
Dependent Claim
16 words
The film substrate of claim 1 further comprising (d) a security device between (a) and (b).
Claim 10
Dependent Claim
24 words
The film substrate of claim 4 further comprising (d) a security device between the primer coatings on the inner sides of (a) and (b).
Claim 11
Dependent Claim
30 words
The film substrate of claim 8 wherein said security device is selected from the group consisting of optically variable devices (OVDs), magnetic devices, electronic devices, and rare earth element-containing devices.
Claim 12
Dependent Claim
55 words
The film substrate of claim 8 wherein said security device comprises an optically variable device selected from the group consisting of diffraction gratings, liquid crystals, moire patterns produced by cross-gratings with or without superimposed, refractive, lenticular and transparent grids, spaced partially-reflective, and partially transparent, coatings yielding variable interference patterns, bi-refringent or polarising layers and zone-plates.
Claim 13
Dependent Claim
25 words
The film substrate of claim 11 wherein said optically-variable device is a reflecting diffraction grating comprising a metallized thermoplastic film embossed with a diffraction pattern.
Claim 14
Dependent Claim
22 words
The film substrate of claim 3 wherein said copolymer polypropylene skins on said outer sides are externally coated with an opacifying coating.
Claim 15
Dependent Claim
15 words
The film substrate of claim 13 further comprising a clear window through the film substrate.
Claim 16
Dependent Claim
45 words
The film substrate of claim 1 which comprises an optical varying device (OVD) disposed between (a) and (b) and which is externally coated with an opacifying coating which contains windows in register with said OVD thereby rendering it visible from either side of said substrate.
Claim 17
Dependent Claim
13 words
The film substrate of claim 1 in the form of a bank note.
Claim 18
Dependent Claim
13 words
The film substrate of claim 15 in the form of a bank note.
Claim 19
Dependent Claim
22 words
The film substrate of claim 1 wherein said first direction is transverse direction (TD) and said second direction is machine direction (MD).
Claim 20
Dependent Claim
185 words
A security token comprising an embossable, laminated multilayer film substrate, said substrate comprising: (a) an imbalanced biaxially oriented first layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said first layer being oriented in the transverse direction (TD) to a degree which is at least three times greater than the degree of orientation present in the machine direction (MD); and (b) an imbalanced biaxially oriented second layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said second layer being oriented in the transverse direction to a degree which is at least three times greater than the degree of orientation present in the machine direction, said second layer being laminated to said first layer so that the transverse direction of orientation of said second layer is substantially aligned with the transverse direction of orientation of said first layer and wherein (a) further comprises a coextruded propylene copolymer skin on its inner side.
Claim 21
Dependent Claim
185 words
A security token comprising an embossable, laminated multilayer film substrate, said substrate comprising: (a) an imbalanced biaxially oriented first layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said first layer being oriented in the transverse direction (TD) to a degree which is at least three times greater than the degree of orientation present in the machine direction (MD); and (b) an imbalanced biaxially oriented second layer having inner and outer sides, comprising at least about 50 weight percent of a high density polyethylene having a density of at least about 0.94, said second layer being oriented in the transverse direction to a degree which is at least three times greater than the degree of orientation present in the machine direction, said second layer being laminated to said first layer so that the transverse direction of orientation of said second layer is substantially aligned with the transverse direction of orientation of said first layer and wherein (a) further comprises a coextruded propylene copolymer skin on its inner side.
Claim 22
Dependent Claim
19 words
The security token of claim 19 wherein said second layer is laminated to said first layer by thermal lamination.
Claim 23
Dependent Claim
27 words
The security token of claim 19 wherein said multilayer film substrate further comprises (c) a laminating adhesive resin disposed between the inner sides of (a) and (b).
Claim 24
Dependent Claim
30 words
The security token of claim 21 wherein said laminating adhesive resin comprises a component selected from the group consisting of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE).
Claim 25
Dependent Claim
36 words
The security token of claim 22 wherein the laminating adhesive resin comprises an orientable component which is oriented in the machine direction, resulting in said resin being oriented substantially perpendicular to said first and second layers.
Claim 26
Dependent Claim
23 words
The security token of claim 19 wherein both (a) and (b) further comprise copolymer polypropylene skins disposed on at least one side thereof.
Claim 27
Dependent Claim
24 words
The security token of claim 23 wherein both (a) and (b) further comprise copolymer polypropylene skins on both the inner and outer sides thereof.
Claim 28
Dependent Claim
30 words
The security token of claim 24 wherein a primer coating is provided between the copolymer polypropylene skins on the inner sides of (a) and (b) and the laminating adhesive resin.
Claim 29
Dependent Claim
12 words
The security token of claim 25 wherein said primer comprises polyethyleneimide (PEI).
Claim 30
Dependent Claim
16 words
The security token of claim 19 further comprising (d) a security device between (a) and (b).
Claim 31
Dependent Claim
20 words
The security token of claim 24 further comprising (d) a security device between the inner sides of (a) and (b).
Claim 32
Dependent Claim
25 words
The security token of claim 26 further comprising (d) a security device disposed between the primer coatings on the inner sides of (a) and (b).
Claim 33
Dependent Claim
16 words
The security token of claim 30 wherein said security device comprises an optically variable device (OVD).
Claim 34
Dependent Claim
30 words
The security token of claim 24 wherein said copolymer polypropylene skins on said outer sides comprise 10 to 20 wt% low density polyethylene and are coated with an opacifying coating.
Claim 35
Dependent Claim
15 words
The security token of claim 32 further comprising a clear window through the film substrate.
Claim 36
Dependent Claim
53 words
The security token of claim 19 which comprises an optical varying device (OVD) between (a) and (b) and wherein said copolymer polypropylene skins are externally coated with an opacifying coating which contains at least one window in register with said OVD thereby rendering it visible from at least one side of said substrate.
Claim 37
Dependent Claim
13 words
The security token of claim 19 in the form of a bank note.
Claim 38
Dependent Claim
13 words
The security token of claim 34 in the form of a bank note.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-15 | 2001-06-16 | 2001-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-15 | 2005-06-16 | 2005-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-15 | 2009-06-16 | 2009-12-16 | $7700.00 | Window Closed / Lapsed |