US4070398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates useful as packaging materials and method for manufacture thereof
Assignee: Eastman Kodak Co
•
Filing: 1976-10-18
•
Granted: 1978-01-24
•
Expires: 1996-10-18
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
2026-10-25 16:40
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: 26
Claim 1
Independent Claim
41 words
A laminate adapted for use as a packaging material, said laminate comprising (1) a metal foil (2) a heat-sealable layer of a radiation-cured and heat-fused polymeric composition and (3) a radiation-cured chemically-resistant polymeric interlayer between said foil and said heat-sealable layer.
Claim 2
Dependent Claim
41 words
A laminate adapted for use as a packaging material, said laminate comprising (1) a metal foil (2) a heat-sealable layer of a radiation-cured and heat-fused polymeric composition and (3) a radiation-cured chemically-resistant polymeric interlayer between said foil and said heat-sealable layer.
Claim 3
Dependent Claim
13 words
A laminate as claimed in claim 1 wherein said foil is lead foil.
Claim 4
Dependent Claim
13 words
A laminate as claimed in claim 1 wherein said foil is aluminum foil.
Claim 5
Dependent Claim
18 words
A laminate as claimed in claim 1 additionally comprising a layer of paper laminated to said metal foil.
Claim 6
Dependent Claim
21 words
A laminate as claimed in claim 1 wherein said heat-sealable layer is formed from a vinyl plastisol containing a polymerizable monomer.
Claim 7
Dependent Claim
26 words
A laminate as claimed in claim 1 wherein said heat-sealable layer is formed from a vinyl plastisol containing a vinyl chloride polymer and an acrylic monomer.
Claim 8
Dependent Claim
31 words
A laminate as claimed in claim 1 wherein said heat-sealable layer is formed from a vinyl plastisol containing a vinyl chloride/vinyl acetate copolymer, dioctyl phthalate, neopentyl glycol diacrylate and butyl acrylate.
Claim 9
Dependent Claim
23 words
A laminate as claimed in claim 1 wherein said interlayer is formed by irradiation of a radiation-curable composition comprising an acrylated epoxy resin.
Claim 10
Dependent Claim
18 words
A laminate as claimed in claim 8 wherein said acrylated epoxy resin is a resin derived from bisphenol-A.
Claim 11
Dependent Claim
23 words
A laminate as claimed in claim 8 wherein said acrylated epoxy resin is a condensation product of epichlorohydrin, bisphenol-A and an acrylic monomer.
Claim 12
Dependent Claim
32 words
A laminate as claimed in claim 8 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 13
Dependent Claim
21 words
A laminate as claimed in claim 8 wherein said radiation-curable composition comprises an acrylated epoxy resin and a monofunctional acrylic monomer.
Claim 14
Dependent Claim
34 words
A laminate as claimed in claim 8 wherein said radiation-curable 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 15
Dependent Claim
33 words
A laminate as claimed in claim 8 wherein said radiation-curable composition comprises butyl acrylate, neopentylglycol diacrylate and an acrylated epoxy resin of the formula: ##STR4## wherein n has a value of about 13.
Claim 16
Dependent Claim
22 words
A laminate as claimed in claim 1 wherein said interlayer is formed by irradiation of a radiation-curable composition comprising an acrylated urethane.
Claim 17
Dependent Claim
56 words
A laminate as claimed in claim 1 wherein said metal foil has a thickness in the range from about 0.8 to about 2 mils, said heat-sealable layer has a thickness in the range from about 0.1 to about 5 mils, and said interlayer has a thickness in the range from about 0.2 to about 2 mils.
Claim 18
Dependent Claim
56 words
A laminate as claimed in claim 1 wherein said metal foil has a thickness in the range from about 1 to about 1.5 mils, said heat-sealable layer has a thickness in the range from about 0.5 to about 1 mil, and said interlayer has a thickness in the range from about 0.4 to about 1 mil.
Claim 19
Dependent Claim
85 words
An article of manufacture comprising a container and alkaline fluid means disposed in said container, said container being at least partially constructed from a laminate having at least first, second and third layers, said first layer being a heat-sealable layer of a radiation-cured and heat-fused polymeric composition in contact with said alkaline fluid means, said second layer being a barrier layer disposed between said first and third layers, and said third layer being a metal foil; said barrier layer being a radiation-cured chemically-resistant polymeric layer.
Claim 20
Dependent Claim
85 words
An article of manufacture comprising a container and alkaline fluid means disposed in said container, said container being at least partially constructed from a laminate having at least first, second and third layers, said first layer being a heat-sealable layer of a radiation-cured and heat-fused polymeric composition in contact with said alkaline fluid means, said second layer being a barrier layer disposed between said first and third layers, and said third layer being a metal foil; said barrier layer being a radiation-cured chemically-resistant polymeric layer.
Claim 21
Dependent Claim
22 words
An article of manufacture as claimed in claim 18 wherein said alkaline fluid means is in contact solely with said first layer.
Claim 22
Dependent Claim
29 words
An article of manufacture as claimed in claim 18 wherein said barrier layer is formed from a radiation-curable composition comprising an acrylated epoxy resin and a mono-functional acrylic monomer.
Claim 23
Dependent Claim
42 words
An article of manufacture as claimed in claim 18 wherein said barrier layer is formed from a radiation-curable composition comprising an acrylated epoxy resin, a monofunctional acrylic monomer and a member selected from the group consisting of polyfunctional acrylates and polyfunctional methacrylates.
Claim 24
Dependent Claim
23 words
An article of manufacture as claimed in claim 18 wherein said heat-sealable layer is formed from a vinyl plastisol containing a polymerizable monomer.
Claim 25
Dependent Claim
34 words
An article of manufacture as claimed in claim 20 wherein said acrylated epoxy resin has the formula: ##STR5## wherein R is a hydrogen atom or a methyl group and n is 1 to 20.
Claim 26
Dependent Claim
71 words
An article of manufacture as claimed in claim 20 wherein said heat-sealable layer is formed from a vinyl plastisol containing a vinyl chloride/vinyl acetate copolymer, dioctyl phthalate, neopentyl glycol diacrylate and butyl acrylate, said metal foil is lead foil, and said barrier layer is formed from a radiation-curable composition comprising butyl acrylate, neopentylglycol diacrylate, and an acrylated epoxy resin of the formula: ##STR6## wherein n has a value of about 13.
References Cited (Backward Citations)
US3125273A
Cited
US2354824A
Cited
US2543181A
Cited
US3188266A
Cited
US3669825A
Cited
US3641210A
Cited
US3673054A
Cited
US3661576A
Cited
US3676192A
Cited
US3772062A
Cited
US3759379A
Cited
US3935375A
Cited
US3935367A
Cited
US3943103A
Cited
US3968181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |