US5219002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered polyamide-based synthetic sausage casing
Assignee: Kalle GmbH and Co KG
•
Filing: 1991-01-17
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Granted: 1993-06-15
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Expires: 2011-01-17
Abstract
Abstract A multi-layered tubular synthetic sausage casing which includes an outer polyamide layer, an inner polyolefin layer and an intermediate layer for mutually bonding the inner and outer layers. The inner polyolefin layer includes a copolymer comprised of units of ethylene, propylene or straight-chain alpha-olefins having 4 to 8 carbon atoms, or of a mixture of these copolymers. In a preferred embodiment, the polyolefin layer is comprised of an ethylene/propylene/butylene terpolymer and/or of a propylene/butylene copolymer.
Inventors
- 👤 Karl Stenger
- 👤 Guenther Crass
- 👤 Dieter Beissel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:02
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C2013/0053; A22C2013/0063; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
A coextruded biaxially stretched, heat set, synthetic multilayered sausage casing comprising an outer layer comprised of polyamide, an inner polyolefin layer and an intermediate layer for mutually bonding said inner and outer layers, wherein said inner polyolefin layer comprises at least one polyolefin copolymer which includes units selected from at least two of the group consisting of ethylene, propylene and straight-chain alpha-olefins having 4 to 8 carbon atoms, wherein said inner polyolefin layer is not corona-treated.
Claim 2
Dependent Claim
76 words
A coextruded biaxially stretched, heat set, synthetic multilayered sausage casing comprising an outer layer comprised of polyamide, an inner polyolefin layer and an intermediate layer for mutually bonding said inner and outer layers, wherein said inner polyolefin layer comprises at least one polyolefin copolymer which includes units selected from at least two of the group consisting of ethylene, propylene and straight-chain alpha-olefins having 4 to 8 carbon atoms, wherein said inner polyolefin layer is not corona-treated.
Claim 3
Dependent Claim
29 words
A sausage casing according to claim 1, wherein said inner layer comprises at least one polyolefin selected from the group consisting of an ethylene/propylene/butylene terpolymer and a propylene/butylene copolymer.
Claim 4
Dependent Claim
28 words
A sausage casing according to claim 2, wherein said inner layer further comprises at least one polyolefin selected from the group consisting of polyethylene, polypropylene and ethylene/propylene copolymer.
Claim 5
Dependent Claim
47 words
A sausage casing according to claim 2, wherein said inner layer comprises a mixture of said ethylene/propylene/butylene terpolymer and said propylene/butylene copolymer and includes about 0.1 to 7 weight % of ethylene and about 10 to 40 weight % of butylene, wherein the remainder is substantially propylene.
Claim 6
Dependent Claim
42 words
A sausage casing according to claim 2, wherein said inner layer comprises said ethylene/propylene/butylene terpolymer, wherein said ethylene/propylene/butylene terpolymer comprises about 0.8 to 2 weight % of ethylene and about 2 to 3.5 weight % of butylene, wherein the remainder is propylene.
Claim 7
Dependent Claim
37 words
A sausage casing according to claim 2, wherein said inner layer comprises said propylene/butylene copolymer, wherein said propylene/butylene copolymer comprises about 60 to 75 weight % of propylene and about 25 to 40 weight % of butylene.
Claim 8
Dependent Claim
22 words
A sausage casing according to claim 1, wherein said outer layer further comprises about 5 to about 25 weight % of polyester.
Claim 9
Dependent Claim
13 words
A sausage casing according to claim 7, wherein said polyester comprises polybutylene terephthalate.
Claim 10
Dependent Claim
43 words
A sausage casing according to claim 1, wherein said outer layer comprises a polyamide which includes at least one unit selected from the group consisting of an aliphatic dicarboxylic acid, an aliphatic diamine, an omega-aminocarboxylic acid, and a lactam of an omega-aminocarboxylic acid.
Claim 11
Dependent Claim
24 words
A sausage casing according to claim 9, wherein aid at least one unit comprises an aliphatic dicarboxylic acid having 4 to 10 carbon atoms.
Claim 12
Dependent Claim
23 words
A sausage casing according to claim 9, wherein said at least one unit comprises an aliphatic diamine having 4 to 8 carbon atoms.
Claim 13
Dependent Claim
23 words
A sausage casing according to claim 9 wherein said at least one unit comprises an omega-aminocarboxylic acid having 6 to 12 carbon atoms.
Claim 14
Dependent Claim
32 words
A sausage casing according to claim 9, wherein said outer layer comprises a polyamide which includes at least one unit selected from the group consisting of caprolactam, hexamethylene diamine and adipic acid.
Claim 15
Dependent Claim
32 words
A sausage casing according to claim 1, wherein said intermediate layer comprises a modified polyolefin resin selected from the group consisting of an ethylene/vinyl acetate copolymer, HDPE, rubber-modified HDPE and alkyl-carboxyl-substituted polyolefin.
Claim 16
Dependent Claim
66 words
A sausage casing according to claim 1, wherein said intermediate layer comprises at least one polymeric compound selected from the group consisting of a graft polymer obtained from HDPE and at least one unsaturated cyclic carboxylic acid anhydride, a copolymer of ethylene and an ethylenically-unsaturated ester, and a polyolefin resin based on homo- or copolymers of ethylene and an alpha-olefin having 3 to 8 carbon atoms.
Claim 17
Dependent Claim
17 words
A sausage casing according to claim 4, wherein the terpolymer/copolymer weight ratio is about 6:4 to 4:6.
Claim 18
Dependent Claim
13 words
A sausage casing according to claim 16, wherein said ratio is about 1:1.
Claim 19
Dependent Claim
58 words
A sausage casing according to claim 1, wherein the outer layer has a thickness of about 20 to 35 microns, the polyolefin layer has a thickness of about 5 to 20 microns, and the intermediate layer has a thickness of about 1 to 8 microns, and wherein the diameter of the casing is about 30 to 150 mm..
Claim 20
Dependent Claim
10 words
A sausage encased by a casing according to claim 1.
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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) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |