US5096754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat or tubular film based on cellulose hydrate, process for producing same and sausage products made therewith
Assignee: Hoechst AG
•
Filing: 1990-06-04
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Granted: 1992-03-17
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Expires: 2010-06-04
Abstract
Abstract A film, preferably used as a tubular artificial sausage casing, having a base layer of a material which may be fiber-reinforced, wherein the material includes a mixture of cellulose hydrate and alginic acid and/or alginate. The alginate may be the calcium salt of alginic acid. In addition, a process for producing the film by the viscose process is also described, wherein a mixture of alkaline viscose solution and a soluble salt of alginic acid is coagulated by means of an acidic precipitating fluid.
Inventors
- 👤 Klaus-Dieter Hammer
- 👤 Hermann Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; C; C08; C08L; C08L1/00; C08L1/02; C08L1/06; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
31 words
A film, comprising a layer of material comprising a mixture of: a) cellulose hydrate, and b) at least one component selected from the group consisting of alginic acid and an alginate.
Claim 2
Dependent Claim
31 words
A film, comprising a layer of material comprising a mixture of: a) cellulose hydrate, and b) at least one component selected from the group consisting of alginic acid and an alginate.
Claim 3
Dependent Claim
29 words
A film as recited in claim 1, wherein the total amount of said alginic acid or said alginate is about 1 to 100% by weight, relative to said cellulose.
Claim 4
Dependent Claim
29 words
A film as recited in claim 2, wherein the total amount of said alginic acid or said alginate is about 3 to 90% by weight, relative to said cellulose.
Claim 5
Dependent Claim
29 words
A film as recited in claim 3, wherein the total amount of said alginic acid or said alginate is about 5 to 80% by weight, relative to said cellulose.
Claim 6
Dependent Claim
23 words
A film as recited in claim 1, wherein said alginate comprises an ammonium, alkali metal or alkaline earth metal salt of alginic acid.
Claim 7
Dependent Claim
15 words
A film as recited in claim 1, wherein said alginate comprises sodium or calcium alginate.
Claim 8
Dependent Claim
11 words
A film as recited in claim 1, further comprising a plasticizer.
Claim 9
Dependent Claim
16 words
A film as recited in claim 1, wherein said film is substantially free of a plasticizer.
Claim 10
Dependent Claim
18 words
A film as recited in claim 1, wherein said film is in the form of a shirred tube.
Claim 11
Dependent Claim
34 words
A film as recited in claim 1, wherein a barrier layer is coated on at least one surface of said film so as to prevent atmospheric oxygen and water vapor from permeating said film.
Claim 12
Dependent Claim
14 words
A food product having a casing comprised of a film according to claim 1.
Claim 13
Dependent Claim
16 words
A food product as recited in claim 11, wherein said food product comprises a sausage product.
Claim 14
Dependent Claim
22 words
A food product as recited in claim 12, wherein said sausage product comprises a dry sausage which undergoes maturing prior to use.
Claim 15
Dependent Claim
19 words
A food product as recited in claim 11, wherein said casing further comprises a fibrous web of reinforcing material.
Claim 16
Dependent Claim
38 words
A food product as recited in claim 11, wherein said casing further comprises a barrier layer coated on at least one surface of said film so as to prevent atmospheric oxygen and water vapor from permeating said film.
Claim 17
Dependent Claim
76 words
A process for producing a film containing a layer of a mixture of cellulose hydrate and at least one component selected from the group consisting of alginic acid and an alginate, comprising: a) adding a water-soluble salt of alginic acid to an alkaline viscose solution to form a homogenous mixture; b) forming said homogeneous mixture into a film; and thereafter c) applying an acidic precipitating fluid to said film so as to coagulate said homogeneous mixture.
Claim 18
Dependent Claim
76 words
A process for producing a film containing a layer of a mixture of cellulose hydrate and at least one component selected from the group consisting of alginic acid and an alginate, comprising: a) adding a water-soluble salt of alginic acid to an alkaline viscose solution to form a homogenous mixture; b) forming said homogeneous mixture into a film; and thereafter c) applying an acidic precipitating fluid to said film so as to coagulate said homogeneous mixture.
Claim 19
Dependent Claim
23 words
A process as recited in claim 16, wherein step (a) comprises adding an alkali metal salt of alginic acid to said viscose solution.
Claim 20
Dependent Claim
59 words
A process as recited in claim 16, further comprising after step (c), a step (d) of treating the resultant film with an aqueous solution of a salt of ammonium, alkali metal or alkaline earth metal cations so as to convert a partial amount of the alginic acid precipitated during step (c) to a corresponding salt of the alginic acid.
Claim 21
Dependent Claim
23 words
A process as recited in claim 18, wherein step (d) comprises treating the resultant film with an aqueous solution of CaCl 2 .
Claim 22
Dependent Claim
24 words
A process as recited in claim 16, wherein step (b) comprises: coating said homogeneous mixture onto a fiber web to form a fiber-reinforced film.
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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) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |