DOUBLE PACKAGE FOR POWDERS AND GRANULES AND METHOD OF PACKING Russian patent published in 1999 - IPC

FIELD: packing of materials. SUBSTANCE: package has inner container, featuring high water vapor permeability, for packing the materials, outer container, either impermeable to water vapors or featuring low permeability, for accommodating inner container, and siccatives placed between inner and outer containers. Siccatives absorb moisture passing through inner container at speed higher than speed of moisture rise in inner container caused by liberation of moisture from materials in container. Thanks to it moisture in inner container can be checked and maintained at low level which precludes loss of flowing properties of materials and caking of powders or granules and forming of lumps and clods in storage. EFFECT: prevention of material caking in storage. 5 cl, 6 tbl, 4 dwg, 5 ex