Barrier pack having an absorbing agent applied to the interior of the pack

• US 6,279,736 B1
• Filed: 06/15/1999
• Issued: 08/28/2001
• Est. Priority Date: 04/19/1995
• Status: Expired due to Term

• Current Assignee: CSP Technologies North America LLC (AptarGroup Incorporated)
• Original Assignee: Capitol Specialty Plastics Incorporated
• Inventors: Hekal, Ihab M.
• Primary Examiner(s): Silbaugh, Jan H.
• Assistant Examiner(s): McDowell, Suzanne E.
• Application Number:
  US09/333,711
• Time in Patent Office: 805 Days
• Field of Search: 34/95, 531/11, 206/204, 206/461, 206/538, 502/402, 502/407, 428/446, 428/458, 428/35.7, 428/35.8, 428/36.5
• US Class Current: 206/204
• CPC Class Codes: B01J 20/28019 Spherical, ellipsoidal or cylindrical
• CPC Class Codes: B01J 20/28042 Shaped bodies; Monolithic structures
• CPC Class Codes: B29C 45/16 Making multilayered or multicoloured articles B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816
• CPC Class Codes: B65D 75/327 and forming several compartments
• CPC Class Codes: B65D 75/34 and having several recesses to accommodate a series of articles or quantities of material not used
• CPC Class Codes: B65D 81/264 for absorbing liquids
• CPC Class Codes: B65D 81/266 for absorbing gases, e.g. oxygen absorbers or desiccants B65D51/244, B65D51/30 take precedence
• CPC Class Codes: C08J 9/26 by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 23/0861 Saponified vinylacetate
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/22 Macromolecular compounds not provided for in C08L2666/16 - C08L2666/20
• CPC Class Codes: C08L 29/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C08L 71/00 Compositions of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 71/02 : Polyalkylene oxides
• CPC Class Codes: C08L 77/00 : Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: F26B 21/083 : by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
• CPC Class Codes: F26B 3/283 : in combination with convection
• CPC Class Codes: Y10T 428/1352 : Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/1355 : Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
• CPC Class Codes: Y10T 428/1376 : Foam or porous material containing

Abstract

A barrier pack comprising a cover portion bonded to a base portion to form a sealed unit package capable of containing a product wherein the cover portion has at least one cavity and the base portion and/or cover portion has an absorbing agent material applied to the cavity and/or base portion.

Claims

1. A barrier pack comprising a cover portion bonded to a base portion to form a sealed unit package for containing a product:

(a) the cover portion comprises at least one cavity, the cover portion comprising an absorbing agent material applied to an interior portion of the cavity, wherein the absorbing agent material is formed by combining at least the following components to form a monolithic composition;

an absorbing agent, a water-insoluble polymer and hydrophilic agent; and

wherein the composition comprises at least three phases and has interconnecting channels with the absorbing agent in or adjacent to these channels; and

(b) the base portion is in relation to the cover portion such that the cavity extends outwardly from the base portion.

2. The barrier pack of claim 1 wherein the polymer is selected from the group consisting of epoxy, light curing adhesive, hot melt adhesives and cold melt adhesives.

3. The barrier pack of claim 2 wherein the absorbing agent is a desiccant selected from the group consisting of silica gel and molecular sieve.

4. The barrier pack of claim 2 wherein the absorbing agent is selected from the group consisting of activated carbon, carbon black, ketcham black and diamond powder.

5. The barrier pack of claim 2 wherein the absorbing agent is selected from the group consisting of absorption microspheres, BaTiO₃, SrTiO₃, SiO₂, Al₂O₃, ZnO, TiO₂, MnO, CuO, Sb₂O₃, silica, calcium oxide and ion exchange resins.

6. The barrier pack of claim 1 wherein the absorbing agent is a desiccant selected from the group consisting of silica gel and molecular sieve.

7. The barrier pack of claim 1 wherein the absorbing agent is selected from the group consisting of activated carbon, carbon black, ketcham black and diamond powder.

8. The barrier pack of claim 1 wherein the absorbing agent is selected from the group consisting of absorption microspheres, BaTiO₃, SrTiO₃, SiO₂, Al₂O₃, ZnO, TiO₂, MnO, CuO, Sb₂O₃, silica, calcium oxide and ion exchange resins.

9. A barrier pack comprising a cover portion bonded to a base portion to form a sealed unit package for containing a product:

(a) the cover portion comprises at least one cavity; and

(b) the base portion comprising an absorbing agent material applied to an interior of the base portion and coextensively aligned with the corresponding cavity of the cover portion, wherein the absorbing agent material is formed by combining at least the following components to form a monolithic composition;

an absorbing agent, a water-insoluble polymer and hydrophilic agent; and

wherein the composition comprises at least three phases and has interconnecting channels with the absorbing agent in or adjacent to these channels.

10. The barrier pack of claim 9 wherein the polymer is selected from the group consisting of epoxy, light curing adhesives, hot melt adhesives and cold melt adhesives.

11. The barrier pack of claim 10 wherein the absorbing agent is a desiccant selected from the group consisting of activated carbon, carbon black, ketcham black and diamond powder.

12. The barrier pack of claim 10 wherein the absorbing agent is selected from the group consisting of activated carbon, carbon black, ketcham black and diamond powder.

13. The barrier pack of claim 10 wherein the absorbing agent is selected from the group consisting of absorption microspheres, BaTiO₃, SrTiO₃, SiO₂, Al₂O₃, ZnO, TiO₂, MnO, CuO, Sb₂O₃, silica, calcium oxide and ion exchange resins.

14. The barrier pack of claim 9 wherein the absorbing agent is a desiccant selected from the group consisting of silica gel and molecular sieve.