Polymer composite film with barrier functionality

Abstract

Polymer composite material with barrier functionality, in particular for the use in fumigation methods, comprising at least one base polymer compound and at least one barrier functional layer, wherein the barrier functional layer comprises at least one binder that is cross-linkable and after cross-linking capable of water absorbing and gel-forming.

What is claimed: 
     
         1 . Polymer composite material with barrier functionality comprising at least one base polymer compound and at least one barrier functional layer, wherein the barrier functional layer comprises at least one binder that is cross-linkable and after cross-linking, said binder is capable of water absorption and/or is gel-forming. 
     
     
         2 . Polymer composite material according to  claim 1 , wherein the binder is capable of absorbing at least about 15, times the weight thereof in an aqueous solution containing 0.9 weight percent sodium chloride. 
     
     
         3 . Polymer composite material according to  claim 1  wherein the polymer composite material comprises a multilayer coating structure wherein the same or different barrier functional layers are incorporated into repeating coating layers. 
     
     
         4 . Polymer composite material according to  claim 1 , further comprising at least one coating layer and an organic biocide is incorporated into said coating layer. 
     
     
         5 . Polymer composite material according to  claim 4  wherein the organic biocide is at least one selected from the group consisting of pesticides, herbicides, insecticides, algicides, fungicides, moluscicides, miticides, rodenticides, germicides, antibiotics, antibacterials, antivirals, antifungals, antiseptics, antiprotozoals, antiparasites, antiseptics and disinfectants. 
     
     
         6 . Polymer composite material according to  claim 1 , wherein the base polymer compound is selected from the group consisting of polyethylene terephthalate, polyvinyl chloride, polyolefins such as polyethylene and polypropylene, polystyrene, polyester, polyether, polyacrylate, polycarbonate, polyamide and polyurethane. 
     
     
         7 . Polymer composite material according to  claim 4 , wherein said at least one coating layer comprises gelatin. 
     
     
         8 . Polymer composite material according to  claim 4 , wherein said at least one coating layer comprises at least one additive. 
     
     
         9 . Polymer composite material according to  claim 4 , wherein said at least one coating layer comprises at least one carrier fluid. 
     
     
         10 . Method for the production of a polymer composite material according to  claim 1 , comprising:
 coating the base polymer compound with the barrier functional compound comprising a carrier fluid and a binder, and   curing the barrier functional compound comprising said carrier fluid and said binder to form a coating layer.   
     
     
         11 . Method according to  claim 10  wherein the method further comprises coating at least two sides of the base polymer compound with a different mixture, each comprising at least one barrier functional layer. 
     
     
         12 . Method according to  claim 10 , wherein said coating comprises curtain coating. 
     
     
         13 . A method according to  claim 10 , adopted for use in agriculture and/or horticulture. 
     
     
         14 . A method of  claim 13 , wherein said method involves mulch film, fumigation film and/or propagation film. 
     
     
         15 . Mulch film, fumigation film and/or propagation film comprising a polymer composite material according to  claim 1 . 
     
     
         16 . Material of  claim 2 , wherein said binder comprises a superabsorbent polymer. 
     
     
         17 . Material of  claim 2 , wherein said binder comprises polyacrylate. 
     
     
         18 . Material of  claim 8 , wherein said additive comprises a hardener. 
     
     
         19 . Material of  claim 8 , wherein said additive comprises formaldehyde. 
     
     
         20 . Material of  claim 9 , wherein said fluid comprises water and/or an organic solvent.