EP0301676A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Degradable beverage container
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1988-03-31
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Granted: —
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Expires: 2008-03-31
Abstract
Abstract A sealed container which is at least 80% by volume full of a carbonated beverage, the amount of carbonation of said beverage being sufficient to provide a carbon dioxide pressure of at least 78 kPa (0.8 atm) within said container, which container comprises a degradable plastics shell wherein the oxygen and carbon dioxide permeability of at least the outer portion is below 200 cm³ 25 µm/654 cm² -day-bar (200 cm³ mil/100 sq. in-day-atm) and the oxygen and carbon dioxide permeability of said shell is at least 0.7 cm³ 25 µm/654 cm² -day-bar (0.7 cm³ mil/100 sq. in-day-atm). The container remains stable as long as it is sealed, but starts to degrade when it is opened and the inside is exposed to oxygen in the atmosphere.
Inventors
- 👤 Nicholas Michaels
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 14:57
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/18; B32B7/00; B32B7/02; B65; B65D; B65D65/00; B65D65/38; B65D65/46; B65D65/466; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0033; C08K5/04; C08K5/09; C08K5/098; B32B2307/00; B32B2307/70; B32B2307/716; B32B2307/724; B32B2323/00; B32B2323/10; B32B2439/00; B32B2439/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A sealed container which is at least 80% by volume full of a carbonated beverage, the amount of carbonation of said beverage being sufficient to provide a carbon dioxide pressure of at least 78 kPa (0.8 atm) within said container, which container comprises a degradable plastics shell wherein the oxygen and carbon dioxide permeability of at least the outer portion is below 200 cm³ 25 µm/654 cm²-day-bar (200 cm³ mil/100 sq.in-day-atm) and the oxygen and carbon dioxide permeability of said shell is at least 0.7 cm³ 25 µm/654 cm² -day-bar (0.7 cm³ mil/100 sq.in-day-atm).
Claim 2
Dependent Claim
94 words
A sealed container which is at least 80% by volume full of a carbonated beverage, the amount of carbonation of said beverage being sufficient to provide a carbon dioxide pressure of at least 78 kPa (0.8 atm) within said container, which container comprises a degradable plastics shell wherein the oxygen and carbon dioxide permeability of at least the outer portion is below 200 cm³ 25 µm/654 cm²-day-bar (200 cm³ mil/100 sq.in-day-atm) and the oxygen and carbon dioxide permeability of said shell is at least 0.7 cm³ 25 µm/654 cm² -day-bar (0.7 cm³ mil/100 sq.in-day-atm).
Claim 3
Dependent Claim
13 words
A container according to claim 1, wherein said plastics shell is of polypropylene.
Claim 4
Dependent Claim
15 words
A container according to claim 1 or 2 wherein the plastics shell contains a degradant.
Claim 5
Dependent Claim
18 words
A container according to claim 3, wherein said degradant is a cerium salt of a monobasic carboxylic acid.
Claim 6
Dependent Claim
12 words
A container according to claim 4 wherein said degradant is cerium stearate.
Claim 7
Dependent Claim
28 words
A container according to claim 3, 4 or 5 wherein the amount of degradant is from 100 to 10,000 parts per million by weight of said plastics shell.
Claim 8
Dependent Claim
26 words
A container according to any one of the preceding claims wherein said plastics shell comprises an inner plastics layer and an outer barrier layer contiguous therewith.
Claim 9
Dependent Claim
49 words
A container according to claim 7, wherein said inner plastics layer has a permeability of Px and where said outer barrier layer has a permeability of Py, where Py < Px and where Px is no greater than 500 cm³ 25 µm/654 cm² -day-bar (500 cm³ mil/100 sq in-day-atm).
Claim 10
Dependent Claim
144 words
A container according to claim 7 or 8 wherein the plastics shell is less than 2 mm (80 mils) thick and comprises; a core of coextruded, non-fibrous polypropylene; two layers of polypropylene which have each been monoaxially stretched to a tensile yield strength of above 55 MPa (8,000 psi) in any one direction and to an elastic modulus of above 2.8 × 10⁹ Pa (400,000 psi) in any one direction, one layer having been wrapped around the core singularly or in plys at an angle of from +50° to +60° and the other layer having been wrapped around said core singularly or in plys at an angle of from -50° to -60°; an adhesive layer between said polypropylene layers and between the inner of said polypropylene layers and said core; at least one layer of barrier material; and ends attached to said plastics shell.
References Cited (Backward Citations)
No citation records indexed.
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