US4362784A
Expired / Lapsed
US
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Packing materials for molten contents
Assignee: Toppan Inc
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Filing: 1980-04-24
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Granted: 1982-12-07
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Expires: 2000-04-24
Abstract
Abstract A packing material for molten contents is composed of a base film coated with a resin (C) containing an ethylenevinyl acetate copolymer (A) having a vinyl acetate content of approximately 5 to 40 percent by weight and a copolymer (B) of either ethylene or an alpha-olefin with an unsaturated carboxylic acid or its anhydride, having a molecular weight of approximately 2,000 to 20,000, and having the following formula: <IMAGE> (wherein R stands for a hydrogen atom or an alkyl group having between 1 and 98, carbon atoms, inclusive, and X stands for a residue of an unsaturated carboxylic acid or its anhydride), in an (A) to (B) ratio between approximately 99:1 and 60:40 by weight or coated with the resin (C) to which a tackifying agent (D) is added in an amount between approximately 3 and 30 percent by weight.
Inventors
- 👤 Takeo Kato
- 👤 Nobuyoshi Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:31
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/70; B65D85/72; B65D85/76; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/082; B32B15/085; B32B15/20; B32B23/00; B32B23/04; B32B23/08; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/30; B32B27/304; B32B27/306; B32B27/32; B32B27/36; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; B32B2439/00; B32B2439/40; B32B2439/62; B32B2439/70; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2822; Y10T428/2826; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31786; Y10T428/31797; Y10T428/31801; Y10T428/31804; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31935
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A packing material for molten contents at a temperature of 75° to 95° C. comprising a base material film on which is extrusion-coated with 20 to 45 g/m 2 of a resin (C) comprising an ethylene-vinyl acetate copolymer (A) having a vinyl acetate content of approximately 5 to 40 percent by weight and a copolymer (B) of ethylene or an alpha-olefin with an unsaturated carboxylic acid or its anhydride, said copolymer (B) having a molecular weight of approximately 2,000 to 20,000 and a melting point of 70° to 80° C., and having the following general formula: ##STR2## (wherein R stand for a hydrogen atom or an alkyl group having between 1 and 98 carbon atoms, inclusive, and X stands for a residue of an unsaturated carboxylic acid or its anhydride), in an (A) to (B) ratio between approximately 99:1 and 60:40 by weight.
Claim 2
Dependent Claim
143 words
A packing material for molten contents at a temperature of 75° to 95° C. comprising a base material film on which is extrusion-coated with 20 to 45 g/m 2 of a resin (C) comprising an ethylene-vinyl acetate copolymer (A) having a vinyl acetate content of approximately 5 to 40 percent by weight and a copolymer (B) of ethylene or an alpha-olefin with an unsaturated carboxylic acid or its anhydride, said copolymer (B) having a molecular weight of approximately 2,000 to 20,000 and a melting point of 70° to 80° C., and having the following general formula: ##STR2## (wherein R stand for a hydrogen atom or an alkyl group having between 1 and 98 carbon atoms, inclusive, and X stands for a residue of an unsaturated carboxylic acid or its anhydride), in an (A) to (B) ratio between approximately 99:1 and 60:40 by weight.
Claim 3
Dependent Claim
31 words
A packing material according to claim 1, wherein said resin (C) is admixed with a tackifying agent (D) in a (C) to (D) ratio between approximately 97:3 and 70:30 by weight.
Claim 4
Dependent Claim
35 words
A packing material according to claim 2, wherein said tackifying agent (D) is selected from the group consisting of an aliphatic hydrocarbon resin, an aromatic hydrocarbon resin, a copolymeric hydrocarbon resin or a mixture thereof.
Claim 5
Dependent Claim
52 words
A packing material according to claim 2, wherein said tackifying agent (D) is selected from the group consisting of an aliphatic hydrocarbon resin, an aromatic hydrocarbon resin and a copolymeric hydrocarbon resin, or is a mixture of one or more of these resins with a rosin derivative or a modified rosin derivative.
Claim 6
Dependent Claim
56 words
The packing material according to claims 1 and 2, wherein said resin (C) or a mixture of said resin (C) and said tackifying agent in an amount between approximately 90 and 99 percent by weight is admixed with a synthetic wax or a natural wax in an amount between approximately 1 and 10 percent by weight.
References Cited (Backward Citations)
US3483076A
Cited
US3652362A
Cited
US3868433A
Cited
US3908070A
Cited
US4252846A
Cited
JPS5584659A
Cited
US4247584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |