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US5049624A Expired / Lapsed US ⏱️ 0.0 years remaining

Packaging

Assignee: Constar International LLC
•
Filing: 1989-03-10
•
Granted: 1991-09-17
•
Expires: 2009-03-10
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Abstract

Abstract The present invention provides a wall for a package comprising: (a) an outer set of one or more layers (1-4) and (b) an inner set of one or more layers (5-6) which layer or the outermost of which layers (5) comprises a composition comprising a polymer and having oxygen-scavenging properties, wherein (i) the outer set of layers would have, if separate from the inner set and in the absence of any oxygen-scavenging properties in any of the layers or the layer constituting the set, a permeance, for oxygen, of not more than 1.5 cm 3 /(m 2 atm day); (ii) the inner set of layers would have, if separate from the outer set and in the absence of oxygen-scavenging properties in any of the layers or the layer constituting the set, a permeance, for oxygen, of at least 2.0 cm 3 /(m 2 atm day); and (iii) the inner set of layers would have, if separate from the outer set, a permeance, for oxygen, less than the permeance specified in (ii) by at least 1.0 cm 3 /(m 2 atm day) by virtue of oxygen-scavenging in at least the layer specified in (b). In a preferred combination one of the outer layers (3) is of metal and the composition in the outermost of the inner layers (5) scavenges oxygen through the metal-catalyzed oxidation of an oxidizable organic component thereof. The wall is suitable for packaging uses, with the inner set of layers disposed towards the product, where headspace scavenging is especially desired.

Inventors

  • 👤 John F. Adams
  • 👤 Michael A. Cochran
  • 👤 Rickworth Folland
  • 👤 James W. Nicholas
  • 👤 Melvin E. R. Robinson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 14:18
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B7/00; B32B7/02; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/09; B32B15/20; B32B27/18; B32B27/32; B32B27/36; B32B7/04; B32B7/12; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/267; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08K5/04; C08K5/09; C08K5/098; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L23/12; C08L67/00; C08L67/02; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2367/00; B32B2439/00; B32B2439/70; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08L51/00; C08L51/06; C08L75/00; C08L75/04; C08L79/00; C08L79/04; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/1379; Y10T428/26; Y10T428/31504; Y10T428/31786; Y10T428/31797

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 202 words
A wall for a package comprising (a) an outer set of one or more layers; and (b) an inner set of one or more layers, which layer or the outermost of which layers comprises a composition comprising a synthetic polymer and having oxygen-scavenging properties, wherein (i) the outer set of layers would have, if separate from the inner set and in the absence of any oxygen-scavenging properties in any of the layers of the layer constituting the set, a permeance, for oxygen, of not more than 1.5 cm 3 /(m 2 atm day); (ii) the inner set of layers would have, if separate from the outer set and in the absence of oxygen-scavenging properties in any of the layers or the layer constituting the set, a permeance, for oxygen, of at least 2.0 cm 3 /(m 2 atm day); (iii) the inner set of layers would have, if separate from the outer set, a permenance, for oxygen, less than the permeance specified in (ii) by at least 1.0 cm 3 /(m 2 atm day) by virtue of oxygen-scavenging in at least the layer specified in (b); and (iv) the composition scavenges oxygen through the metal-promoted oxidation of an oxidisable organic component thereof.
Claim 2
Dependent Claim 202 words
A wall for a package comprising (a) an outer set of one or more layers; and (b) an inner set of one or more layers, which layer or the outermost of which layers comprises a composition comprising a synthetic polymer and having oxygen-scavenging properties, wherein (i) the outer set of layers would have, if separate from the inner set and in the absence of any oxygen-scavenging properties in any of the layers of the layer constituting the set, a permeance, for oxygen, of not more than 1.5 cm 3 /(m 2 atm day); (ii) the inner set of layers would have, if separate from the outer set and in the absence of oxygen-scavenging properties in any of the layers or the layer constituting the set, a permeance, for oxygen, of at least 2.0 cm 3 /(m 2 atm day); (iii) the inner set of layers would have, if separate from the outer set, a permenance, for oxygen, less than the permeance specified in (ii) by at least 1.0 cm 3 /(m 2 atm day) by virtue of oxygen-scavenging in at least the layer specified in (b); and (iv) the composition scavenges oxygen through the metal-promoted oxidation of an oxidisable organic component thereof.
Claim 3
Dependent Claim 19 words
A wall according to claim 1, wherein the oxidisable organic component includes one or more --CO--NH--groups in the molecule.
Claim 4
Dependent Claim 14 words
A wall according to claim 1, wherein the oxidisable organic component is a polymer.
Claim 5
Dependent Claim 14 words
A wall according to claim 1, wherein the oxidisable organic component is a polyamide.
Claim 6
Dependent Claim 23 words
A wall according to claim 1, wherein the oxidisable organic component is a polymer containing units of the formula --NH--CH.sub.2 --arylene--CH.sub.2 --NH--CO--alkylene--CO--. 9
Claim 7
Dependent Claim 18 words
A wall according to claim 1, wherein the polymer specified in (b) above is a polymer of propylene.
Claim 8
Dependent Claim 18 words
A wall according to claim 1, wherein the polymer specified in (b) above is a polymer of ethylene.
Claim 9
Dependent Claim 40 words
A wall according to claim 1, shaped to receive a product to be packaged, wherein the side of the aforesaid inner set of layers is disposed on the side of the wall onto which the product is to be received.
Claim 10
Dependent Claim 11 words
A wall according to claim 1, which is a lidding material.
Claim 11
Dependent Claim 25 words
A wall according to claim 1, wherein the inner set of layers comprises at least two layers, the innermost of which is a heat-seal layer.
Claim 12
Dependent Claim 27 words
A package containing an oxygen-sensitive product and having a wall according to claim 1, the inner set of layers of the wall being disposed towards the product.

References Cited (Backward Citations)

US3586514A Cited
US4048361A Cited
US4041209A Cited
GB1582463A Cited
GB1582296A Cited
EP0083826A1 Cited
GB2119741A Cited
WO1990000504A1 Cited
WO1990000578A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1994-09-16 1995-03-18 1995-09-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1998-09-16 1999-03-18 1999-09-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2002-09-16 2003-03-18 2003-09-17 $7700.00 Window Closed / Lapsed

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