US5185189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered tubular packaging casing
Assignee: Kalle GmbH and Co KG
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Filing: 1991-05-28
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Granted: 1993-02-09
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Expires: 2011-05-28
Abstract
Abstract A polyamide-based multilayered tubular packaging casing for pasty matter, in particular a synthetic sausage casing, is disclosed having an outer layer comprised of aliphatic polyamide, aliphatic copolyamide or a polymer blend comprising at least one of these compounds, an intermediate layer that is impermeable to water vapor and comprised of a polyolefin and an adhesion-promoting agent, and an inner layer that is preferably impermeable to oxygen and comprised of aliphatic and/or partially aromatic polyamides and/or aliphatic and/or partially aromatic copolyamides.
Inventors
- 👤 Karl Stenger
- 👤 Marliese Saal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:06
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A22; A22C; A22C13/00; A22C13/0013; B32B1/00; B32B1/08; B32B27/32; B32B27/34; A22C2013/002; A22C2013/0053; A22C2013/0083; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2323/00; B32B2323/04; B32B2323/10; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
120 words
A multilayered, tubular packaging casing for pasty materials having an outer layer, an intermediate layer and an inner layer wherein: said outer layer comprises a polymer selected from the group consisting of an aliphatic polyamide, an aliphatic copolyamide and a polymer blend containing at least one aliphatic polyamide or aliphatic copolyamides; said intermediate layer comprises a polyolefin and an adhesion promoting agent, said intermediate layer having a thickness of at least about 2 microns; and said inner layer comprises a polymer selected from the group consisting of an aliphatic polyamide, a partially aromatic polyamide, an aliphatic copolyamide, a partially aromatic copolyamide and a polymer blend containing at least one aliphatic polyamide, partially aromatic polyamide, aliphatic copolyamide, or partially aromatic copolyamide.
Claim 2
Dependent Claim
120 words
A multilayered, tubular packaging casing for pasty materials having an outer layer, an intermediate layer and an inner layer wherein: said outer layer comprises a polymer selected from the group consisting of an aliphatic polyamide, an aliphatic copolyamide and a polymer blend containing at least one aliphatic polyamide or aliphatic copolyamides; said intermediate layer comprises a polyolefin and an adhesion promoting agent, said intermediate layer having a thickness of at least about 2 microns; and said inner layer comprises a polymer selected from the group consisting of an aliphatic polyamide, a partially aromatic polyamide, an aliphatic copolyamide, a partially aromatic copolyamide and a polymer blend containing at least one aliphatic polyamide, partially aromatic polyamide, aliphatic copolyamide, or partially aromatic copolyamide.
Claim 3
Dependent Claim
43 words
The casing as claimed in claim 1, wherein said aliphatic polyamide or copolyamide of said outer layer comprises units selected from the group consisting of an aliphatic primary diamine, an aliphatic dicarboxylic acid, an omega-aminocarboxylic acid, and a lactam of said omega-aminocarboxylic acid.
Claim 4
Dependent Claim
18 words
The casing as claimed in claim 2, wherein said aliphatic primary diamine has 4 to 8 carbon atoms.
Claim 5
Dependent Claim
18 words
The casing as claimed in claim 2, wherein said aliphatic dicarboxylic acid has 4 to 10 carbon atoms.
Claim 6
Dependent Claim
17 words
The casing as claimed in claim 2, wherein said omega-aminocarboxylic acid has 6 to 12 carbon atoms.
Claim 7
Dependent Claim
19 words
The casing as claimed in claim 3, wherein said aliphatic primary diamine comprises tetra-, penta-, hexa- or octamethylene diamine.
Claim 8
Dependent Claim
23 words
The casing as claimed in claim 4, wherein said aliphatic dicarboxylic acid comprises adipic acid, azelaic acid, sebacic acid or dodecane dicarboxylic acid.
Claim 9
Dependent Claim
26 words
The casing as claimed in claim 5, wherein said omega-aminocarboxylic acid comprises 11-amino-undecanoic acid, and the lactam of said omega-aminocarboxylic acid comprises omega-lauric lactam or caprolactam.
Claim 10
Dependent Claim
46 words
The casing as claimed in claim 1, wherein the outer layer comprises a polymer blend of polyamide and copolyamide and an additional component selected from the group consisting of polyolefins and modified polyolefins in an amount of up to 25% by weight of the outer layer.
Claim 11
Dependent Claim
12 words
The casing as claimed in claim 9, wherein said polyolefin is polyethylene.
Claim 12
Dependent Claim
13 words
The casing as claimed in claim 10, wherein said polyester is polybutylene terephthalate.
Claim 13
Dependent Claim
28 words
The casing as claimed in claim 9, wherein the additional component is a polyolefin present in an amount of up to 25% by weight of the outer layer.
Claim 14
Dependent Claim
29 words
The casing as claimed in claim 9, wherein the additional component is a modified polyolefin present in an amount of up to 25% by weight of the outer layer.
Claim 15
Dependent Claim
34 words
The casing as claimed in claim 9, wherein the additional component is selected from the group consisting of ionomers and polyesters in an amount of up to 15% by weight of the outer layer.
Claim 16
Dependent Claim
35 words
The casing as claimed in claim 9, further comprising an additional component selected from the group consisting of an ionomer and polyester in an amount of up to 15% by weight of the outer layer.
Claim 17
Dependent Claim
44 words
The casing as claimed in claim 1, wherein said polyolefin of said intermediate layer is selected from the group consisting of a homopolymer of ethylene, a homopolymer of propylene, a copolymer of linear alpha-olefins having 2 to 8 carbon atoms, and a mixture thereof.
Claim 18
Dependent Claim
36 words
The casing as claimed in claim 1, wherein said polyolefin of said intermediate layer comprises a copolymer selected from the group consisting of an ethylene/propylene copolymer, an ethylene/propylene/butylene copolymer, a propylene/butylene copolymer and a mixture thereof.
Claim 19
Dependent Claim
41 words
The casing as claimed in claim 1, wherein said adhesion promoting agent is present in the intermediate layer in an amount between about 5% to 50% by weight based on the total weight of said polyolefin and said adhesion promoting agent.
Claim 20
Dependent Claim
41 words
The casing as claimed in claim 18, wherein said adhesion promoting agent is present in the intermediate layer in an amount between about 10% to 35% by weight based on the total weight of said polyolefin and said adhesion promoting agent.
Claim 21
Dependent Claim
27 words
The casing as claimed in claim 1, wherein said adhesion promoting agent of said intermediate layer is a polyolefin resin modified by at least one functional group.
Claim 22
Dependent Claim
29 words
The casing as claimed in claim 20, wherein said functional group is selected from the group consisting of vinyl acetate, vinyl alcohol, and an ethylenically unsaturated carboxylic acid anhydride.
Claim 23
Dependent Claim
40 words
The casing as claimed in claim 1, wherein said aliphatic polyamide of said inner layer is selected from the group consisting of an aliphatic primary diamine, an aliphatic dicarboxylic acid, an omega-aminocarboxylic acid, and a lactam of said omega-aminocarboxylic acid.
Claim 24
Dependent Claim
18 words
The casing as claimed in claim 22, wherein said aliphatic primary diamine has 4 to 8 carbon atoms.
Claim 25
Dependent Claim
19 words
The casing as claimed in claim 23, wherein said aliphatic primary diamine comprises tetra-, penta-, hexa- or octamethylene diamine.
Claim 26
Dependent Claim
18 words
The casing as claimed in claim 22, wherein said aliphatic dicarboxylic acid has 4 to 10 carbon atoms.
Claim 27
Dependent Claim
23 words
The casing as claimed in claim 25, wherein said aliphatic dicarboxylic acid comprises adipic acid, azelaic acid, sebacic acid or dodecane dicarboxylic acid.
Claim 28
Dependent Claim
17 words
The casing as claimed in claim 22, wherein said omega-aminocarboxylic acid has 6 to 12 carbon atoms.
Claim 29
Dependent Claim
26 words
The casing as claimed in claim 27, wherein said omega-aminocarboxylic acid comprises 11-amino-undecanoic acid, and the lactam of said omega-aminocarboxylic acid comprises omega-lauric lactam or caprolactam.
Claim 30
Dependent Claim
45 words
The casing as claimed in claim 1, wherein said partially aromatic polyamide and/or partially aromatic copolyamide is present in said inner layer in an amount between 5% to 85% by weight based upon the combined total weight of the polymer blend in said inner layer.
Claim 31
Dependent Claim
45 words
The casing as claimed in claim 29, wherein said partially aromatic polyamide and/or partially aromatic copolyamide is present in said inner layer in an amount between 10% to 40% by weight based upon the combined total weight of the polymer blend in said inner layer.
Claim 32
Dependent Claim
24 words
The casing as claimed in claim 1, wherein said casing comprises a three-layered coextruded and biaxially stretch-oriented tubular film which optionally is also heat-set.
Claim 33
Dependent Claim
66 words
The casing as claimed in claim 1, wherein said casing has a total wall thickness between 30 and 60 μm, said outer layer having a thickness between 45% to 80% of said total wall thickness, said intermediate layer having a thickness between 5% to 40% of said total wall thickness, and said inner layer having a thickness between 2% and 35% of said total wall thickness.
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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) | 1996-02-09 | 1996-08-10 | 1997-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-09 | 2000-08-10 | 2001-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-09 | 2004-08-10 | 2005-02-09 | $7700.00 | Window Closed / Lapsed |