US4119743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of laminates which are useful as packaging materials
Assignee: Eastman Kodak Co
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Filing: 1977-08-02
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Granted: 1978-10-10
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Expires: 1997-08-02
Abstract
Abstract Heat-sealable laminates useful as packaging materials, for example, for the packaging of photographic processing chemicals, are comprised of a layer of metal foil, an outer heat-sealable layer of a radiation-cured and heat-fused polymeric composition, and a radiation-cured chemically-resistant polymeric interlayer between the foil and the outer layer. The laminates are manufactured by coating a metal foil with a radiation-curable composition that is capable of forming a chemically-resistant layer upon radiation curing, irradiating the coating to cure it, overcoating with a radiation-curable composition such as a vinyl plastisol that is capable of forming a heat-sealable layer upon radiation curing, irradiating the overcoat to cure it, and heating the laminate to fuse the overcoat layer.
Inventors
- 👤 Chen-i Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:59
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/12; B32B15/20; B32B27/00; B32B27/30; B32B27/304; B32B27/38; G; G03; G03C; G03C5/00; G03C5/26; G03C5/264; G03C5/267; G03F; G03F7/00; G03F7/0012; B32B38/00; B32B2038/0052; B32B2038/0076; B32B2307/00; B32B2307/30; B32B2307/31; B32B2311/00; B32B2311/14; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31551; Y10T428/31573; Y10T428/31576; Y10T428/3158; Y10T428/31605; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
84 words
A method of making a laminated sheet material which comprises the steps of: (1) coating a metal foil with a first radiation-curable composition that is capable of forming a chemically-resistant layer upon radiation curing, (2) irradiating said coating to cure said first composition, (3) overcoating the resulting cured layer with a second radiation-curable composition that is capable of forming a heat-sealable layer upon radiation curing, (4) irradiating said overcoat to cure said second composition, and (5) heating said overcoat to fuse said second composition.
Claim 2
Independent Claim
84 words
A method of making a laminated sheet material which comprises the steps of: (1) coating a metal foil with a first radiation-curable composition that is capable of forming a chemically-resistant layer upon radiation curing, (2) irradiating said coating to cure said first composition, (3) overcoating the resulting cured layer with a second radiation-curable composition that is capable of forming a heat-sealable layer upon radiation curing, (4) irradiating said overcoat to cure said second composition, and (5) heating said overcoat to fuse said second composition.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1 wherein said first and second compositions are cured by exposure to high energy ionizing radiation.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 2 wherein the total dosage employed in each such curing step is in the range of from about 0.5 to about 20 megarads.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 1 wherein each of said first and second compositions comprises a photoinitiator and is cured by exposure to ultraviolet radiation.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 1 wherein said first composition comprises an acrylated epoxy resin.
Claim 7
Dependent Claim
34 words
A method as claimed in claim 1 wherein said first composition comprises an acrylated epoxy resin, a monofunctional acrylic monomer and a member selected from the group consisting of polyfunctional acrylates and polyfunctional methacrylates.
Claim 8
Dependent Claim
32 words
A method as claimed in claim 5 wherein said acrylated epoxy resin has the formula: ##STR3## wherein R is a hydrogen atom or a methyl group and n is 1 to 20.
Claim 9
Dependent Claim
19 words
A method as claimed in claim 1 wherein said second composition is a vinyl plastisol containing a polymerizable monomer.
Claim 10
Dependent Claim
24 words
A method as claimed in claim 1 wherein said second composition is a vinyl plastisol containing a vinyl chloride polymer and an acrylic monomer.
Claim 11
Dependent Claim
30 words
A method as claimed in claim 1 wherein said second composition is a vinyl plastisol containing a vinyl chloride vinyl acetate copolymer, dioctyl phthalate, neopentyl glycol diacrylate and butyl acrylate.
Claim 12
Dependent Claim
63 words
A method as claimed in claim 1 wherein said metal foil is lead foil, said first composition is comprised of butyl acrylate, neopentylglycol diacrylate, and an acrylated epoxy resin of the formula: ##STR4## wherein n has a value of about 13 and said second composition is a vinyl plastisol containing a vinyl chloride/vinyl acetate copolymer, dioctyl phthalate, neopentyl glycol diacrylate and butyl acrylate.
Claim 13
Dependent Claim
37 words
A method as claimed in claim 1 wherein said heating is carried out for a period of about 4 to about 30 minutes at a temperature in the range from about 120° C. to about 180° C.
Claim 14
Dependent Claim
37 words
A method as claimed in claim 1 wherein said heating is carried out for a period of about 6 to about 15 minutes at a temperature in the range from about 130° C. to about 140° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |