US5332616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Produce packaging film
Assignee: Cryovac LLC
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Filing: 1992-10-28
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Granted: 1994-07-26
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Expires: 2012-10-28
Abstract
Abstract A multilayer film suitable for packaging produce comprises a core layer comprising a blend of ethylene butyl acrylate copolymer and very low density polyethylene; and two outer layers comprising a blend of ethylene alpha olefin copolymer having a density of at least about 0.916 grams per cubic centimeter, and ethylene vinyl acetate copolymer.
Inventors
- 👤 Ray E. Patrick
- 👤 Solomon Bekele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:58
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/308; B32B27/32; B65; B65D; B65D81/00; B65D81/24; B32B2307/00; B32B2307/70; B32B2307/724; B32B2323/00; B32B2323/04; B32B2323/046; B32B2331/00; B32B2331/04; B32B2439/00; B32B2439/70; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
An oriented multilayer film comprising: a) a core layer comprising a blend of ethylene butyl acrylate copolymer and very low density polyethylene; and b) two outer layers comprising a blend of ethylene alpha olefin copolymer having a density of at least about 0.916 grams per cubic centimeter, and ethylene vinyl acetate copolymer.
Claim 2
Dependent Claim
52 words
An oriented multilayer film comprising: a) a core layer comprising a blend of ethylene butyl acrylate copolymer and very low density polyethylene; and b) two outer layers comprising a blend of ethylene alpha olefin copolymer having a density of at least about 0.916 grams per cubic centimeter, and ethylene vinyl acetate copolymer.
Claim 3
Dependent Claim
38 words
A multilayer film according to claim 1 wherein said film has an oxygen transmission rate of between about 6,000 cc/m 2 and 10,000 cc/m 2 per 1.25 mil at standard temperature and pressure in 24 hours (ASTM 3985).
Claim 4
Dependent Claim
37 words
A multilayer film according to claim 1 wherein said film has a carbon dioxide transmission rate of between about 16,000 cc/m 2 and 26,000 cc/m 2 per 1.25 mil at standard temperature and pressure in 24 hours.
Claim 5
Dependent Claim
22 words
A multilayer film according to claim 1 wherein the ethylene alpha olefin copolymer of the outer layers comprises linear low density polyethylene.
Claim 6
Dependent Claim
22 words
A multilayer film according to claim 1 wherein the ethylene alpha olefin copolymer of the outer layers comprises linear medium density polyethylene.
Claim 7
Dependent Claim
27 words
A multilayer film according to claim 1 wherein the ethylene alpha olefin copolymer of the outer layers comprises linear low density polyethylene and linear medium density polyethylene.
Claim 8
Dependent Claim
30 words
A multilayer film according to claim 1 wherein the two outer layers each comprise a blend of linear low density polyethylene, linear medium density polyethylene, and ethylene vinyl acetate copolymer.
Claim 9
Dependent Claim
45 words
A multilayer film according to claim 7 wherein the two outer layers each comprise a blend of between about 40% and 60% linear low density polyethylene, between about 20% and 30% linear medium density polyethylene, and between about 20% and 30% ethylene vinyl acetate copolymer.
Claim 10
Dependent Claim
32 words
The film according to claim 1 wherein the film has been oriented by racking at a racking ratio of from about 3.0 to about 6.0 in both the longitudinal and transverse directions.
Claim 11
Dependent Claim
12 words
The film according to claim 1 wherein the film has been cross-linked.
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) | 1997-07-25 | 1998-01-24 | 1998-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-25 | 2002-01-24 | 2002-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-25 | 2006-01-24 | 2006-07-26 | $7700.00 | Window Closed / Lapsed |