Water soluble packaging system, film and method
AssigneesSyngenta Crop Protection AG, Monosol, LLC
InventorsARMAND J. DESMARAIS, HENRY E. KNOOP, LAWRENCE C. DULL, JEAN A. RAYMOND
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Abstract
The present invention relates to a bag packaging system composed of a bag sealable to contain a liquid, in which the bag is composed of a continuous outer water soluble film and an inner continuous protective film layer that allows storage therein of a liquid that would chemically or physically react with the water soluble film but is prevented from doing so by the presence of the continuous protective film layer on the inner portion of the bag.
Claims49
A water soluble bag packaging system for transporting agrichemicals which chemically or physically react with water soluble films, said packaging system comprising a bag containing an agrichemical composition, said bag containing an outer cold water-soluble film layer and an inner barrier layer and the inner barrier layer prevents the agrichemical composition from contacting the water soluble film layer, and wherein when the packaging system is placed in water and said water-soluble film layer dissolves and said inner barrier layer dissolves or disperses into particles small enough to allow the agrichemical to disperse into the water.
A method of packaging an agrichemical which chemically or physically reacts with a cold water soluble film comprising:
- forming a bag from a film comprising an outer layer of the cold water soluble film and an inner barrier layer that does not react with or become dissolved by the agrichemical, the inner barrier layer forming the bag interior and being dispersible or dissolvable in cold water upon dissolving of the cold water soluble layer;
- adding a desired amount of the agrichemical into the bag;
- and
- thereafter sealing the bag with the agrichemical contained therein, the barrier layer preventing the agrichemical composition from contacting the outer water soluble film layer.
A multi-layer water soluble film, suitable for construction of a bag to contain liquid that adversely affects water soluble film comprising:
- an outer continuous layer of cold water soluble film of sufficient thickness and strength to provide sufficient structural integrity to contain the liquid in a bag once the outer soluble film layer is dissolved.
A multi-layer water soluble film, suitable for construction of a bag to contain liquid therein comprising an outer continuous layer of cold water soluble film comprising polyvinyl alcohol;
- and
- an inner continuous layer of a cold water soluble film, different than the outer continuous layer and selected from the group consisting of cellulose derivatives which have a degree of substitution that provides cold water solubility, the outer and inner layers providing sufficient structural strength to contain liquids when formed into a bag.
A water soluble bag for containing an agrichemical composition that substantially deleteriously affects cold water soluble film, said bag comprising an outer layer of the cold water soluble film and an inner barrier layer wherein said agrichemical composition does not react with or substantially deleteriously affect the inner barrier layer and the inner barrier layer is capable of preventing the agrichemical composition when stored therein from contacting the water soluble film layer, and wherein when the bag is placed in water with the agrichemical stored therein said water-soluble film layer dissolves and said inner barrier layer dissolves or disperses into particles small enough to allow the agrichemical to disperse into the water.
Dependencies are inferred from the claim text.