US4403464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic coated/polyvinylidene chloride coated polyolefin film
Assignee: Mobil Oil AS
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Filing: 1981-04-09
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Granted: 1983-09-13
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Expires: 2001-04-09
Abstract
Abstract A single-ply polyolefin film coated on one side with a heat sealable acrylic-based interpolymer consisting essentially of an alpha-beta monoethylenically unsaturated carboxylic acid and neutral monomer esters comprising an alkyl acrylate and an alkyl methacrylate ester or mixtures thereof, and on the other side with a heat sealable polyvinylidene chloride-based multipolymer; said film being useful in diverse packaging applications.
Inventors
- 👤 Gary L. Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/30; C09J7/35; B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/308; C09J7/20; C09J7/22; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/50; B32B2307/514; B32B2307/518; B32B2323/00; B32B2323/10; B32B2327/00; B32B2327/06; B32B2553/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A method of making a package for a product from a single-ply oriented polyolefin film having a heat sealable acrylic-based coating on one side; and a heat sealable polyvinylidene chloride-based coating on the other side comprising: forming said package from said film with said polyvinylidene chloride-based coating facing inwardly, and with said acrylic-based coating facing outwardly, and heat sealing said film about said product; wherein said acrylic-based coating consists essentially of an interpolymer of an alpha-beta monoethylenically unsaturated carboxylic acid selected from acrylic acid, methacrylic acid, and mixtures thereof, and neutral monomer esters selected from methyl acrylate, ethyl acrylate and methyl methacrylate; and wherein said polyvinylidene chloride-based coating consists essentially of an interpolymer of vinylidene chloride, an alpha-beta ethylenically unsaturated carboxylic acid selected from acrylic acid, methacrylic acid and mixtures thereof and an ethylenically unsaturated monomer selected from methyl acrylate, ethyl acrylate and mixtures thereof.
Claim 2
Independent Claim
145 words
A method of making a package for a product from a single-ply oriented polyolefin film having a heat sealable acrylic-based coating on one side; and a heat sealable polyvinylidene chloride-based coating on the other side comprising: forming said package from said film with said polyvinylidene chloride-based coating facing inwardly, and with said acrylic-based coating facing outwardly, and heat sealing said film about said product; wherein said acrylic-based coating consists essentially of an interpolymer of an alpha-beta monoethylenically unsaturated carboxylic acid selected from acrylic acid, methacrylic acid, and mixtures thereof, and neutral monomer esters selected from methyl acrylate, ethyl acrylate and methyl methacrylate; and wherein said polyvinylidene chloride-based coating consists essentially of an interpolymer of vinylidene chloride, an alpha-beta ethylenically unsaturated carboxylic acid selected from acrylic acid, methacrylic acid and mixtures thereof and an ethylenically unsaturated monomer selected from methyl acrylate, ethyl acrylate and mixtures thereof.
Claim 3
Dependent Claim
10 words
The method of claim 1 wherein said polyolefin is polypropylene.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein heat is applied to only said acrylic-based coating to seal said package.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein said package is lap sealed.
Claim 6
Dependent Claim
19 words
The method of claim 3 wherein said package is sealed with opposing polyvinylidene chloride-based coating surfaces in abutting contact.
Claim 7
Dependent Claim
66 words
The method of claim 1 wherein said acrylic-based coating contains from about 2 to 15 parts by weight based on said acrylic-based coating of alpha-beta monoethylenically unsaturated carboxylic acid selected from acrylic acid, methacrylic acid and mixtures thereof and from about 85 to about 98 parts by weight based on said acrylic-based composition of neutral monomer esters selected from methyl acrylate, ethyl acrylate, and methyl methacrylate.
Claim 8
Dependent Claim
28 words
The method of claim 1 wherein said acrylic-based coating contains a hot-slip agent consisting of a finely-divided, water-insoluble, inorganic solid and a cold-slip, anti-blocking material comprising finely-divided wax.
Claim 9
Dependent Claim
12 words
The method of claim 7 wherein said inorganic solid is colloidal silica.
Claim 10
Dependent Claim
36 words
The method of claim 1 wherein said polyvinylidene chloride-based coating comprises about 80%-90% by weight of vinylidene chloride, about 5 to about 10% by weight of methacrylic acid, and about 5%-10% by weight of methyl acrylate.
Claim 11
Dependent Claim
31 words
The method of claim 1 wherein said acrylic-based coating comprises from about 50 to about 60% by weight of methyl acrylate and up to about 5% by weight of methacrylic acid.
Claim 12
Dependent Claim
10 words
The method of claim 10 wherein said polyolefin is polypropylene.
Claim 13
Dependent Claim
11 words
The method of claim 11 wherein said polypropylene is biaxially oriented.
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |