Packaging material with cavity, in particular for vegetable material

Abstract

The invention concerns a packaging material comprising two layers delimiting between them a cavity. A substance capable of retaining gas therein is housed in the cavity and one of the layers is permeable to gas ethylene and impermeable to water vapour.

1 - 8 . (canceled)  
     
     
         9 . A packaging material comprising 
 two plies defining between them a cavity, and    a substance, capable of retaining gases in its environment, disposed in the cavity,    at least one of the plies being made of a material permeable to gaseous ethylene and impermeable to water vapor.    
     
     
         10 . The material as claimed in  claim 9 , wherein the two plies are made of a material permeable to gaseous ethylene and impermeable to water vapor.  
     
     
         11 . The material as claimed in  claim 9 , wherein the two plies are made of the same material.  
     
     
         12 . The material as claimed in  claim 9 , wherein the substance is bonded to one of the plies.  
     
     
         13 . The material as claimed in  claim 9 , wherein the material of at least one of plies has open pores with electrical polarity.  
     
     
         14 . A package having at least one wall made of a material as claimed in  claim 9 .  
     
     
         15 . Packaged vegetable matter, packaged in a package as claimed in  claim 14 .  
     
     
         16 . The packaged vegetable matter as claimed in  claim 15 , wherein it is at a certain distance from the substance of the packaging material.