Patent US4248912A successfully refreshed from Google Patents.
US4248912A
Expired / Lapsed
US
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Process for preparing packaging material suitable for sausage casings
Assignee: Hoechst AG
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Filing: 1979-04-03
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Granted: 1981-02-03
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Expires: 1999-04-03
Abstract
Abstract Disclosed is a packaging material suitable for manufacturing synthetic sausage casings, comprised of a cellulose hydrate base layer and a layer of vinylidene chloride containing copolymer on the base layer, as well as several methods for preparing the packaging material.
Inventors
- 👤 Gunter Gerigk
- 👤 Wolfgang Klendauer
- 👤 Horst Pietruck
- 👤 Klaus-Dieter Hammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:28
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J2301/00; C08J2301/06; C08J2427/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
186 words
A process for the production of a regenerated cellulose tube containing a portion of water and chemical plasticizer wherein a liquid aqueous copolymer dispersion containing polyvinylidene chloride is continuously applied to the inside surface of a tube composed of regenerated cellulose, characterized in that a liquid coating is applied to the inside surface of the wall of a tube on the basis of cellulose hydrate that is in its gelled state, the coating being composed of an aqueous copolymer dispersion the dispersed portion of which consists of a copolymer obtained by copolymerization of a mixture of polymerizable monomers, this mixture consisting of 70 to 92 percent by weight of vinylidene chloride and of 8 to 30 percent by weight of acrylic acid and acrylic acid ester, or acrylic acid and methacrylic acid ester, or acrylic acid, acrylic acid ester and methacrylic acid ester, or methacrylic acid and acrylic acid ester, or methacrylic acid and methacrylic acid ester, or methacrylic acid, acrylic acid ester and methacrylic acid ester, after which the tube is dried by heating in a single step heating action, and then wetted with water.
Claim 2
Dependent Claim
186 words
A process for the production of a regenerated cellulose tube containing a portion of water and chemical plasticizer wherein a liquid aqueous copolymer dispersion containing polyvinylidene chloride is continuously applied to the inside surface of a tube composed of regenerated cellulose, characterized in that a liquid coating is applied to the inside surface of the wall of a tube on the basis of cellulose hydrate that is in its gelled state, the coating being composed of an aqueous copolymer dispersion the dispersed portion of which consists of a copolymer obtained by copolymerization of a mixture of polymerizable monomers, this mixture consisting of 70 to 92 percent by weight of vinylidene chloride and of 8 to 30 percent by weight of acrylic acid and acrylic acid ester, or acrylic acid and methacrylic acid ester, or acrylic acid, acrylic acid ester and methacrylic acid ester, or methacrylic acid and acrylic acid ester, or methacrylic acid and methacrylic acid ester, or methacrylic acid, acrylic acid ester and methacrylic acid ester, after which the tube is dried by heating in a single step heating action, and then wetted with water.
Claim 3
Dependent Claim
47 words
The process as defined in claim 1, wherein the dispersed substance of the aqueous dispersion consists of a copolymer of 90 percent by weight of vinylidene chloride, 1 percent by weight of acrylic acid, and 9 percent by weight of acrylic acid ester or methacrylic acid ester.
Claim 4
Dependent Claim
45 words
The process as defined in claim 1, wherein the dispersed substance of the aqueous dispersion is composed of a copolymer of 90 percent by weight of vinylidene chloride, 1 percent by weight of acrylic acid, and 9 percent by weight of acrylic acid methyl ester.
Claim 5
Dependent Claim
13 words
The process as defined in claim 1, wherein the tube wall is filter-reinforced.
Claim 6
Dependent Claim
152 words
Process for the production of tube based on regenerated cellulose which comprises applying a liquid layer to the inside surface of a tube based on regenerated cellulose which is in its gelled state, said liquid layer consisting of an aqueous dispersion the dispersed portion of which is composed of a mixture of a first and a second copolymer in a ratio of 1:1 to 4:1, the first copolymer consisting of 90 percent by weight of vinylidene chloride, 1 percent by weight of acrylic acid, and 9 percent by weight of acrylic and methyl ester, and the second copolymer consisting of 85 percent by weight of vinylidene chloride, 2 percent by weight of acrylic acid, 6 percent by weight of acrylic acid methyl ester, and 7 percent by weight of acrylic acid butyl ester, after which the tube is dried by heating in a single step heating action, and then wetted with water.
Claim 7
Dependent Claim
152 words
Process for the production of tube based on regenerated cellulose which comprises applying a liquid layer to the inside surface of a tube based on regenerated cellulose which is in its gelled state, said liquid layer consisting of an aqueous dispersion the dispersed portion of which is composed of a mixture of a first and a second copolymer in a ratio of 1:1 to 4:1, the first copolymer consisting of 90 percent by weight of vinylidene chloride, 1 percent by weight of acrylic acid, and 9 percent by weight of acrylic and methyl ester, and the second copolymer consisting of 85 percent by weight of vinylidene chloride, 2 percent by weight of acrylic acid, 6 percent by weight of acrylic acid methyl ester, and 7 percent by weight of acrylic acid butyl ester, after which the tube is dried by heating in a single step heating action, and then wetted with water.
Claim 8
Dependent Claim
20 words
The process according to claim 5, wherein the ratio of the first and second copolymers in the dispersion is 1:1.
Claim 9
Dependent Claim
21 words
The process according to claim 5, wherein the ratio of the first and second copolymers in the polymer dispersion is 4:1.
Claim 10
Dependent Claim
12 words
The process according to claim 5, wherein the tube wall is fiber-reinforced.
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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |