EP0113136A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Packaging film permeable to smoke constituents and packaged, smoked foodstuff
Assignee: Akzo NV
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Filing: 1983-11-25
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Granted: —
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Expires: 2003-11-25
Abstract
Abstract A packaging film which is permeable to smoke constituents is made from a thermoplastic copolyester. The copolyester is built up of recurrent long-chain and short-chain ester units which are joined head-to-tail through ester bonds, the long-chain ester units corresponding to the formula and the short-chain ester units to the formula: where R, is a divalent radical remaining after removal of the terminal hydroxyl groups from a poly(alkylene oxide) glycol having a molecular weight in the range of 600 to 6000 and a carbon to oxygen ratio of 2,0 to 2,7; R 2 is a divalent radical remaining after removal of the hydroxyl groups from a diol having a molecular weight not higher than 250; R 3 is a divalent radical remaining after removal of the carboxylic acid groups from a dicarboxylic acid. Said long-chain ester units amount to 20 to 60% by weight of the copolyester and at least 70% of the R 3 groups are 1,4-phenyiene radicals. The phenol number of the film, expressed in mg per m 2 , is at least 20. The film is particularly suitable for packaging foodstuffs that are smoked in the packaged state, such as smoked sausages.
Inventors
- 👤 Cornelius Martinus Franciscus Vrouenraets
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C2013/0059; A22C2013/0089; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
189 words
Packaging film, particularly for foodstuffs, which is permeable to smoke constituents, characterized in that the film entirely or substantially consists of a thermoplastic copolyester which is built up of recurrent long-chain and short-chain ester units which are joined head-to-tail through ester bonds, the long-chain ester units corresponding to the formula and the short-chain ester units to the formula: where R 1 is a divalent radical remaining after removal of the terminal hydroxyl groups from a poly(alkylene oxide) glycol having a molecular weight in the range of 600 to 6000 and a carbon to oxygen ratio of 2,0 to 2,7; R 2 is a divalent radical remaining after removal of the hydroxyl groups from a diol having a molecular weight not higher than 250; R 3 is a divalent radical remaining after removal of the carboxylic acid groups from a dicarboxylic acid; with the proviso that said long-chain ester units amount to 20 to 60% by weight of the copolyester and at least 70% of the R 3 groups are 1,4-phenylene radicals, and the phenol number of the film, expressed in mg per m 2 , is at least 20.
Claim 2
Dependent Claim
189 words
Packaging film, particularly for foodstuffs, which is permeable to smoke constituents, characterized in that the film entirely or substantially consists of a thermoplastic copolyester which is built up of recurrent long-chain and short-chain ester units which are joined head-to-tail through ester bonds, the long-chain ester units corresponding to the formula and the short-chain ester units to the formula: where R 1 is a divalent radical remaining after removal of the terminal hydroxyl groups from a poly(alkylene oxide) glycol having a molecular weight in the range of 600 to 6000 and a carbon to oxygen ratio of 2,0 to 2,7; R 2 is a divalent radical remaining after removal of the hydroxyl groups from a diol having a molecular weight not higher than 250; R 3 is a divalent radical remaining after removal of the carboxylic acid groups from a dicarboxylic acid; with the proviso that said long-chain ester units amount to 20 to 60% by weight of the copolyester and at least 70% of the R 3 groups are 1,4-phenylene radicals, and the phenol number of the film, expressed in mg per m 2 , is at least 20.
Claim 3
Dependent Claim
20 words
Film according to claim 1, characterized in that R 2 is derived from an aliphatic diol having 2-4 carbon atoms.
Claim 4
Dependent Claim
14 words
Film according to claim 2, characterized in that R 2 is derived from 1,4-butanediol.
Claim 5
Dependent Claim
23 words
Film according to one or more of the claims 1 to 3, characterized in that R 1 is derived from poly(ethylene oxide) glycol.
Claim 6
Dependent Claim
23 words
Film according to one or more of the claims 1 to 4, characterized in that 100% of the R3 groups are 1,4-phenylene radicals.
Claim 7
Dependent Claim
31 words
Film according to one or more of the claims 1 to 5, characterized in that the molecular weight of the poly(alkylene oxide) glycol is in the range of 800 to 4000.
Claim 8
Dependent Claim
22 words
Film according to one or more of the claims 1 to 6, characterized in that the phenol number is at least 50.
Claim 9
Dependent Claim
29 words
Film according to one or more of the claims 1 to 7, characterized in that the thickness of the film is in the range of 1 to 300 m.
Claim 10
Dependent Claim
25 words
Film according to one or more of the claims 1 to 8, characterized in that the aldehyde number of the film is at least 3000.
Claim 11
Dependent Claim
24 words
Film according to one or more-of the claims 1 to 9, characterized in that the acid number of the film is at least 200.
Claim 12
Dependent Claim
19 words
Film according to one or more of the claims 1 to 10, characterized in that the film is flat.
Claim 13
Dependent Claim
19 words
Film according to one or more of the claims 1 to 10, characterized in that the film is tubular.
Claim 14
Dependent Claim
15 words
Film according to claim 11 or 12, characterized in that the film is biaxially drawn.
Claim 15
Dependent Claim
78 words
Film according to one or more of the claims 1 to 13, characterized in that R 1 is derived from poly(ethylene oxide) glycol, R2 is derived from 1,4-butanediol and R 3 is 1,4-phenylene, the content of long-chain ester units in the copolyester is 30-45% by weight, the phenol number of the film is 50-500, the aldehyde number of the film is 3000-50 000, and the thickness of the film is 5-100 µm, and the film is biaxially drawn.
Claim 16
Dependent Claim
17 words
15 . Smoked foodstuff packaged in a film according to one or more of the claims 1-14.
Claim 17
Dependent Claim
19 words
Smoked sausage of which the casing consists of a film according to one or more of the claims 1-14.
References Cited (Backward Citations)
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