US4870134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film, sheet and laminate capable of forming easy-open packagings
Assignee: Shell USA Inc
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Filing: 1987-05-27
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Granted: 1989-09-26
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Expires: 2007-05-27
Abstract
Abstract Film or sheets and a laminar structure fabricated from blends of an ethylene-carboxylic copolymer, a butene-1 homopolymer or copolymer, and a propylene homopolymer or copolymer.
Inventors
- 👤 Charles C. Hwo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:29
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B15/082; B32B15/085; B32B15/20; B32B27/30; B32B27/308; B32B27/32; B32B27/34; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0846; C09J123/0869; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/50; B32B2307/514; B32B2307/518; B32B2311/00; B32B2311/24; B32B2553/00; C08L2205/00; C08L2205/03; C08L23/10; C08L23/12; C08L23/18; C08L23/20; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
66 words
A packaging film or sheet which is capable of forming peel seals, comprising: from about 5 percent by weight to about 25 percent by weight of the butene-1 homopolymer or copolymer; from about 50 percent by weight to about 90 percent by weight of an ethylene-carboxylic acid copolymer; and from about 5 percent by weight to about 45 percent by weight of propylene homopolymer or copolymer.
Claim 2
Dependent Claim
66 words
A packaging film or sheet which is capable of forming peel seals, comprising: from about 5 percent by weight to about 25 percent by weight of the butene-1 homopolymer or copolymer; from about 50 percent by weight to about 90 percent by weight of an ethylene-carboxylic acid copolymer; and from about 5 percent by weight to about 45 percent by weight of propylene homopolymer or copolymer.
Claim 3
Dependent Claim
65 words
The packaging film or sheet of claim 1 which consists of: from about 55 percent by weight to about 70 percent by weight of said ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 20 percent by weight of said butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of said propylene homopolymer or copolymer.
Claim 4
Dependent Claim
44 words
The packaging film or sheet of claim 1 which consists of: about 65 percent by weight of said ethylene-carboxylic acid copolymer; about 15 percent by weight of said butene-1 homopolymer or copolymer; and about 20 percent by weight of said propylene homopolymer or copolymer.
Claim 5
Dependent Claim
45 words
The packaging film or sheet of claim 1, wherein said ethylenecarboxylic acid copolymer is selected from the group consisting of: ethylene acrylic acid (EAA), ethylene methyl acrylic acid (EMAA), ethylene ethyl acrylic acid (EEAA), ethylene butyl acrylic acid (EBAA), and ethylene propyl acrylic acid (EPAA).
Claim 6
Dependent Claim
15 words
The packaging film or sheet of claim 1 which comprises an unoriented or oriented film.
Claim 7
Dependent Claim
67 words
A packaging film or sheet which is capable of forming peel seals, comprising: from about 55 percent by weight to about 70 percent by weight of an ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 15 percent by weight of a butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of a propylene homopolymer or copolymer.
Claim 8
Dependent Claim
67 words
A packaging film or sheet which is capable of forming peel seals, comprising: from about 55 percent by weight to about 70 percent by weight of an ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 15 percent by weight of a butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of a propylene homopolymer or copolymer.
Claim 9
Dependent Claim
44 words
The packaging film or sheet of claim 6 which consists of: about 65 percent by weight of said ethylene-carboxylic acid copolymer; about 15 percent by weight of said butene-1 homopolymer or copolymer; and about 20 percent by weight of said propylene homopolymer or copolymer.
Claim 10
Dependent Claim
45 words
The packaging film or sheet of claim 6, wherein said ethylene-carboxylic acid copolymer is selected from the group consisting of: ethylene acrylic acid (EAA), ethylene methyl acrylic acid (EMAA), ethylene ethyl acrylic acid (EEAA), ethylene butyl acrylic acid (EBAA), and ethylene propyl acrylic acid (EPAA).
Claim 11
Dependent Claim
16 words
The packaging film or sheet of claim 6 which comprises a biaxially oriented film or sheet.
Claim 12
Dependent Claim
47 words
A packaging film or sheet which is capable of forming peel seals, consisting of: about 65 percent by weight of an ethylene-carboxylic acid copolymer; about 15 percent by weight of a butene-1 homopolymer or copolymer; and about 20 percent by weight of a propylene homopolymer or copolymer.
Claim 13
Dependent Claim
47 words
A packaging film or sheet which is capable of forming peel seals, consisting of: about 65 percent by weight of an ethylene-carboxylic acid copolymer; about 15 percent by weight of a butene-1 homopolymer or copolymer; and about 20 percent by weight of a propylene homopolymer or copolymer.
Claim 14
Dependent Claim
40 words
The packaging film or sheet of claim 10, wherein said ethylenecarboxylic acid copolymer is selected from the group consisting of: ethylene-acrylic acid (EAA), ethylene-methyl acrylic acid (EMAA), ethylene ethyl-acrylic acid (EEAA), ethylene-butyl acrylic acid (EBAA), and ethylenepropyl acrylic acid (EPAA).
Claim 15
Dependent Claim
17 words
The packaging film or sheet of claim 10 which comprises an unoriented or oriented film or sheet.
Claim 16
Dependent Claim
67 words
A blend for producing a packaging film which is capable of forming peel seals, comprising: from about 50 percent by weight to about 90 percent by weight of an ethylene-carboxylic acid copolymer; from about 5 percent by weight to about 25 percent by weight of the butene-1 homopolymer or copolymer; and from about 5 percent by weight to about 45 percent by weight propylene homopolymer or copolymer.
Claim 17
Dependent Claim
67 words
A blend for producing a packaging film which is capable of forming peel seals, comprising: from about 50 percent by weight to about 90 percent by weight of an ethylene-carboxylic acid copolymer; from about 5 percent by weight to about 25 percent by weight of the butene-1 homopolymer or copolymer; and from about 5 percent by weight to about 45 percent by weight propylene homopolymer or copolymer.
Claim 18
Dependent Claim
62 words
The blend of claim 13 which consists of: from about 55 percent by weight to about 70 percent by weight of said ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 20 percent by weight of said butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of said propylene homopolymer or copolymer.
Claim 19
Dependent Claim
41 words
The blend of claim 13 which consists of: about 65 percent by weight of said ethylene-carboxylic acid copolymer; about 15 percent by weight of said butene-1 homopolymer or copolymer; and about 20 percent by weight of said propylene homopolymer or copolymer.
Claim 20
Dependent Claim
42 words
The blend of claim 13 wherein said ethylene-carboxylic acid copolymer is selected from the group consisting of: ethylene acrylic acid (EAA), ethylene methyl acrylic acid (EMAA), ethylene ethyl acrylic acid (EEAA), ethylene butyl acrylic acid (EBAA), and ethylene propyl acrylic acid (EPAA).
Claim 21
Dependent Claim
69 words
A blend for producing a packaging film which is capable of forming peel seals, comprising: from about 55 percent by weight to about 70 percent by weight of an ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 15 percent by weight of a butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of a propylene homopolymer or copolymer.
Claim 22
Dependent Claim
69 words
A blend for producing a packaging film which is capable of forming peel seals, comprising: from about 55 percent by weight to about 70 percent by weight of an ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 15 percent by weight of a butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of a propylene homopolymer or copolymer.
Claim 23
Dependent Claim
41 words
The blend of claim 17 which consists of: about 65 percent by weight of said ethylene-carboxylic acid copolymer; about 15 percent by weight of said butene-1 homopolymer or copolymer; and about 20 percent by weight of said propylene homopolymer or copolymer.
Claim 24
Dependent Claim
42 words
The blend of claim 17, wherein said ethylene-carboxylic acid copolymer is selected from a group consisting of: ethylene acrylic acid (EAA), ethylene methyl acrylic acid (EMAA), ethylene ethyl acrylic acid (EEAA), ethylene butyl acrylic acid (EBAA), and ethylene propyl acrylic acid (EPAA).
Claim 25
Dependent Claim
78 words
A laminar structure comprising a substrate to which is bonded by extrusion lamination, a film or sheet, which is capable of forming peel seals, comprising: from about 50 percent by weight to about 90 percent by weight of an ethylene-carboxylic acid copolymer; from about 5 percent by weight to about 25 percent by weight of the butene-1 homopolymer or copolymer; and from about 5 percent by weight to about 45 percent by weight of propylene homopolymer or copolymer.
Claim 26
Dependent Claim
78 words
A laminar structure comprising a substrate to which is bonded by extrusion lamination, a film or sheet, which is capable of forming peel seals, comprising: from about 50 percent by weight to about 90 percent by weight of an ethylene-carboxylic acid copolymer; from about 5 percent by weight to about 25 percent by weight of the butene-1 homopolymer or copolymer; and from about 5 percent by weight to about 45 percent by weight of propylene homopolymer or copolymer.
Claim 27
Dependent Claim
63 words
The laminar structure of claim 22 which consists of: from about 55 percent by weight to about 70 percent by weight of said ethylene-carboxylic acid copolymer; from about 10 percent by weight to about 15 percent by weight of said butene-1 homopolymer or copolymer; and from about 10 percent by weight to about 35 percent by weight of said propylene homopolymer or copolymer.
Claim 28
Dependent Claim
42 words
The laminar structure of claim 20 which consists of: about 65 percent by weight of said ethylene-carboxylic acid copolymer; about 15 percent by weight of said butene-1 homopolymer or copolymer; and about 20 percent by weight of said propylene homopolymer or copolymer.
Claim 29
Dependent Claim
43 words
The laminar structure of claim 20, wherein said ethylenecarboxylic acid copolymer is selected from the group consisting of: ethylene acrylic acid (EAA), ethylene methyl acrylic acid (EMAA), ethylene ethyl acrylic acid (EEAA), ethylene butyl acrylic acid (EBAA), and ethylene propyl acrylic acid (EPAA).
Claim 30
Dependent Claim
15 words
The laminar structure of claim 20, wherein said film or sheet is unoriented or oriented.
Claim 31
Dependent Claim
11 words
The laminar structure of claim 20, wherein said substrate is nylon.
Claim 32
Dependent Claim
13 words
The laminar structure of claim 20, wherein said substrate is high density polyethylene.
Claim 33
Dependent Claim
12 words
The laminar structure of claim 20, wherein said substrate is aluminum foil.
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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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |