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US5512333: Method of making and using a degradable package for containment of liquids

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Filing Information

Inventor(s) Stuart P. Suskind ·
Assignee(s) ICD Industries ·
Attorney/Agent(s) Finnegan, Henderson, Farabow, Garrett & Dunner ·
Primary Examiner James J. Seidleck ·
Assistant Examiner Michael A. Williamson ·
Application Number US8224002
Filing date 04/06/1994
Issue date 04/30/1996
Predicted expiration date 10/16/2012
U.S. Classifications 427/536  · 427/539  ·
International Classifications B05D 300  ·
Kind CodeA
International Classifications 42834.2;34.3 ·
Related U.S. Application DataThis application is a continuation-in-part of U.S. patent application Ser. No. 07/962,100, filed Oct. 16, 1992, now abandoned, and is a continuation-in-part of divisional U.S. patent application Ser. No. 08/154,456, now U.S. Pat. No. 5,458,933, filed Dec. 17, 1993.
19 Claims, No Drawings


Abstract

A method of making and using a compostable paperboard container and package for liquids which is coated with a polymeric material capable of degrading under composting conditions and subsequently in the presence of light to form carbon dioxide, water, and biomass.

Independent Claims | See all claims (19)

  1. 1. A method of making a compostable package for containing a liquid or a liquid containing material comprising,providing a base of paperboard having an external surface and an internal surface;treating at least one of said internal and external surfaces with corona discharge or a flame;coating the internal surface of said paperboard with a biodegradable polymer capable of preventing leaks and coating the external surface with a biodegradable polymer wherein at least one of said internal and external polymer coatings contains a photodegradable polyolefin, wherein said base of paperboard and said coatings compost at substantially the same rate to carbon dioxide, water, and biomass and wherein at least said treated internal or external surface and said coating define a water insensitive inter-facial bond free of adhesive; andforming said paperboard into a container wherein said internal surface forms the interior of the container and said external surface forms the exterior of the container.
  2. 10. A method of using a compostable package for containing a liquid or a liquid containing material comprising,providing a base of paperboard having an external surface and an internal surface;coating the internal surface of said paperboard with a biodegradable polymer capable of preventing leaks and coating the external surface with a biodegradable polymer wherein at least one of said internal and externals polymer coatings contains a photodegradable polyolefin, wherein said base of paperboard and said coatings compost at substantially the same rate to carbon dioxide, water, and biomass;forming said paperboard into a container wherein said internal surface having said biodegradable polymer thereon forms the interior or the container and said external surface forms the exterior of the container;sealing the edges and bottom of said container; andplacing into said container a liquid or a material containing a liquid.
  3. 19.19. A method of composting a coated paperboard comprising:providing a coated paperboard substrate having two sides and having a biodegradable linear aliphatic polyester on at least one side thereof and a photodegradable polyolefin on at least the other side thereof;subjecting said coated paperboard to composting conditions to compost at substantially the same rate as said biodegradable polyester and said paperboard substrate to carbon dioxide, water and biomass; andsubjecting the remaining photodegradable polyolefin to light to cause substantially complete degradation thereof.

References Cited

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Foreign Patent Documents

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EP0194097THE PROCTER & GAMBLE COMPANYSep 1986
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Other Publications

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Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
US5512333 ICD Industries Stuart P. Suskind Apr 1996
US5540962 Leonard Pearlstein Stuart P. Suskind Jul 1996