Water soluble packaging system and method

A method of packaging an agrichemical or agrichemical composition which chemically or physically reacts with a cold water-soluble film comprising:

• forming a bag from a composite film said composite 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 or agrichemical composition, the inner barrier layer being a continuous film and forming the bag interior and being dissolvable or dispersible into particles not in excess of 250 microns in cold water upon dissolution of the cold water-soluble layer, the inner barrier layer being a polymer layer which does not dissolve in water at temperatures above 50° C. and is selected from the group consisting of cellulose derivatives in which the degree of substitution is sufficient to prevent solubility above 50° C. selected from the group consisting of cellulose acetate lactate, cellulose lactate, methylhydroxybutyl cellulose, hydrophobically modified cellulose derivatives, and combinations thereof;
• adding a desired amount of the agrichemical or agrichemical composition into the bag, said outer cold water-soluble film layer providing structure to said bag;
• and thereafter sealing the bag with agrichemical or agrichemical composition contained therein, the inner barrier layer preventing the agrichemical or agrichemical composition from contacting the outer cold water-soluble film layer.

A water soluble bag adapted for containing an agrichemical or agrichemical composition therein, the agrichemical composition comprising at least said agrichemical therein, said agrichemical composition or agrichemical substantially deleteriously-affecting a cold water-soluble film, said bag comprising an outer layer of the cold water-soluble film and an inner barrier layer, said inner barrier layer being a continuous film and wherein said agrichemical and said agrichemical composition do not react with or substantially deleteriously affect the inner barrier layer and the inner layer is capable of preventing the agrichemical and agrichemical composition when stored in said bag from contacting the cold water-soluble film layer, the inner barrier layer being a polymer layer which does not dissolve in water at temperatures above 50° C. and is selected from the group consisting of cellulose derivatives in which the degree of substitution is sufficient to prevent solubility above 50° C. selected from the group consisting of cellulose acetate lactate, cellulose lactate, methylhydroxybutyl cellulose, hydrophobically modified cellulose derivatives, and combinations thereof, and wherein when the bag is placed in water with the agrichemical or agrichemical composition stored therein, said outer layer of cold water-soluble film dissolves and said inner barrier layer dissolves or disperses into particles of up to 250 microns, said particles being small enough to allow the agrichemical and agrichemical composition to disperse into the water, and said outer cold water-soluble film layer providing structure to said bag.