US5523136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging film, packages and methods for using them
Assignee: Cryovac LLC
•
Filing: 1993-04-30
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Granted: 1996-06-04
•
Expires: 2013-04-30
Abstract
Abstract The invention provides a film, a package and methods for employing the same. The film has a first layer of an elastomer and a second layer of a polyethylene such as a single site catalyst polyethylene. The film can have a third layer of a polyethylene such that the second layer is disposed between the first and third layers. The polyethylene of the third layer also can be single site catalyst polyethylene and, the elastomer of the first layer can be styrene butadiene copolymer. The film has an oxygen transmission rate of up to about 1000, such as 150-450 cc/100 in 2 /24 hr., typically 260-400 cc/100 in 2 /24 hr., with values of 300, 350-360, 400 cc/100 in 2 /24 hr. and even higher exhibited by the film. The film is suitable for packages, for instance, packaging for cole slaw and leafy salad. The film also exhibits excellent clarity, durability, seal strength and machinability.
Inventors
- 👤 David C. Fischer
- 👤 James I. Ririe
- 👤 Richard Mink
- 👤 Monty Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:36
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/327; B32B38/00; B32B38/14; B32B38/145; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/08; C09D123/0807; C09D123/0815; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/724; B32B2323/00; B32B2323/04; B32B2439/00; B32B2439/70; C08L21/00; C08L2314/00; C08L2314/06; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1334; Y10T428/1341; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924; Y10T428/31931
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
48 words
A film comprising: a first outer layer of styrene-butadiene copolymer and, a second layer of a single site catalyst polyethylene; wherein, said film has an oxygen permeability of about 150-450 or greater up to about 1000 cc/100 in 2 /24 hr., and can be sealed with resistance seals.
Claim 2
Dependent Claim
48 words
A film comprising: a first outer layer of styrene-butadiene copolymer and, a second layer of a single site catalyst polyethylene; wherein, said film has an oxygen permeability of about 150-450 or greater up to about 1000 cc/100 in 2 /24 hr., and can be sealed with resistance seals.
Claim 3
Dependent Claim
17 words
The film of claim 1 having an oxygen permeability of about 260-400 cc/100 in 2 /24 hr.
Claim 4
Dependent Claim
17 words
The film of claim 2 having an oxygen permeability of about 300 cc/100 in 2 /24 hr.
Claim 5
Dependent Claim
17 words
The film of claim 2 having an oxygen permeability of about 350-360 cc/100 in 2 /24 hr.
Claim 6
Dependent Claim
17 words
The film of claim 2 having an oxygen permeability of about 400 cc/100 in 2 /24 hr.
Claim 7
Dependent Claim
51 words
A film comprising: a first, outer layer of styrene-butadiene copolymer and a second layer of single site catalyst polyethylene; wherein, said film has an oxygen permeability of about 150-450 or greater up to about 1000 cc/100 in 2 /24 hr., and can be sealed on a form, fill and seal machine.
Claim 8
Dependent Claim
51 words
A film comprising: a first, outer layer of styrene-butadiene copolymer and a second layer of single site catalyst polyethylene; wherein, said film has an oxygen permeability of about 150-450 or greater up to about 1000 cc/100 in 2 /24 hr., and can be sealed on a form, fill and seal machine.
Claim 9
Dependent Claim
20 words
The film of claim 1 or 6 wherein the first and second layers are in intimate contact with each other.
Claim 10
Dependent Claim
15 words
The film of claim 1 or 6 wherein the first and second layers are coextruded.
Claim 11
Dependent Claim
18 words
The film of claim 8 wherein the first and second layers are in intimate contact with each other.
Claim 12
Dependent Claim
30 words
The film of claim 1 or 6 further comprising a third layer of single site catalyst polyethylene wherein said second layer is disposed between the first and the third layers.
Claim 13
Dependent Claim
24 words
The film of claim 10 wherein the first and second layers are coextruded and, the third layer is adhesively laminated to the second layer.
Claim 14
Dependent Claim
18 words
The film of claim 11 wherein the first and second layers are in intimate contact with each other.
Claim 15
Dependent Claim
14 words
The film of claim 11 further comprising printing on the second or third layer.
Claim 16
Dependent Claim
41 words
A film consisting essentially of a first, outer layer of styrene-butadiene copolymer and, a second layer of single site catalyst polyethylene, said film having an oxygen permeability of about 150-450 or greater up to about 1000 cc/100 in 2 /24 hr.
Claim 17
Dependent Claim
41 words
A film consisting essentially of a first, outer layer of styrene-butadiene copolymer and, a second layer of single site catalyst polyethylene, said film having an oxygen permeability of about 150-450 or greater up to about 1000 cc/100 in 2 /24 hr.
Claim 18
Dependent Claim
28 words
The film of claim 14 further consisting essentially of a third layer of single site catalyst polyethylene, said second layer being disposed between said first and third layers.
Claim 19
Dependent Claim
15 words
The film of claim 14 wherein the first and second layers are in intimate contact.
Claim 20
Dependent Claim
15 words
The film of claim 15 wherein the first and second layers are in intimate contact.
Claim 21
Dependent Claim
13 words
The film of claim 16 wherein the first and second layers are coextruded.
Claim 22
Dependent Claim
24 words
The film of claim 17 wherein the first and second layers are coextruded and, the third layer is adhesively laminated to the second layer.
Claim 23
Dependent Claim
17 words
The film of claim 15 having an oxygen permeability of about 260-400 cc/100 in 2 /24 hr.
Claim 24
Dependent Claim
17 words
The film of claim 20 having an oxygen permeability of about 300-400 cc/100 in 2 /24 hr.
Claim 25
Dependent Claim
22 words
A package comprised of a film of any one of claims 1, 6 or 14 wherein the second layer is heat sealed.
Claim 26
Dependent Claim
16 words
A package comprised of a film of claim 10 wherein the third layer is heat sealed.
Claim 27
Dependent Claim
17 words
The film of claim 14 having an oxygen permeability of about 260-400 cc/100 in 2 /24 hr.
Claim 28
Dependent Claim
28 words
The film of claim 15 wherein the first and second layers are coextruded and, the third layer is adhesively laminated to the second layer with a solventless adhesive.
Claim 29
Dependent Claim
16 words
The film of claim 25 further consisting essentially of printing on the second or third layer.
Claim 30
Dependent Claim
34 words
A film consisting of a first, outer layer of styrene-butadiene copolymer and, a second layer of single site catalyst polyethylene, said film having an oxygen permeability of about 150-450 cc/100 in 2 /24 hr.
Claim 31
Dependent Claim
34 words
A film consisting of a first, outer layer of styrene-butadiene copolymer and, a second layer of single site catalyst polyethylene, said film having an oxygen permeability of about 150-450 cc/100 in 2 /24 hr.
Claim 32
Dependent Claim
27 words
The film of claim 27 further consisting of a third layer of single site catalyst polyethylene, said second layer being disposed between said first and third layers.
Claim 33
Dependent Claim
13 words
The film of claim 28 wherein the first and second layers are coextruded.
Claim 34
Dependent Claim
28 words
The film of claim 29 wherein the first and second layers are coextruded and, the third layer is adhesively laminated to the second layer with a solventless adhesive.
Claim 35
Dependent Claim
17 words
The film of claim 30 having an oxygen permeability of about 260-400 cc/100 in 2 /24 hr.
Claim 36
Dependent Claim
25 words
A package consisting essentially of a film of any one of claims 14 or 27 wherein the second layer is heat sealed with resistance seals.
Claim 37
Dependent Claim
25 words
A package consisting essentially of a film of any one of claims 15 or 28 wherein the third layer is heat sealed with resistance seals.
Claim 38
Dependent Claim
16 words
A package comprised of a film of claim 15 wherein the third layer is heat sealed.
Claim 39
Dependent Claim
7 words
The package of claim 22 containing produce.
Claim 40
Dependent Claim
7 words
The package of claim 23 containing produce.
Claim 41
Dependent Claim
7 words
The package of claim 32 containing produce.
Claim 42
Dependent Claim
7 words
The package of claim 33 containing produce.
Claim 43
Dependent Claim
7 words
The package of claim 34 containing produce.
Claim 44
Dependent Claim
12 words
The package of claim 35 wherein the produce is cabbage or lettuce.
Claim 45
Dependent Claim
12 words
The package of claim 36 wherein the produce is cabbage or lettuce.
Claim 46
Dependent Claim
12 words
The package of claim 37 wherein the produce is cabbage or lettuce.
Claim 47
Dependent Claim
12 words
The package of claim 38 wherein the produce is cabbage or lettuce.
Claim 48
Dependent Claim
12 words
The package of claim 39 wherein the produce is cabbage or lettuce.
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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) | 1999-06-04 | 1999-12-04 | 2000-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-04 | 2003-12-04 | 2004-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-04 | 2007-12-04 | 2008-06-04 | $7700.00 | Window Closed / Lapsed |