Abstract: In one aspect, the invention is directed to a biocidal composition, comprising a mixture of a substantially oxidation-resistant thermoplastic polymer having a melting point of about 60° C. to about 100° C.; and a composition for releasing chlorine dioxide gas upon exposure to moisture and having a bulk density less than about 0.15 g/cc, wherein the mixture of the first thermoplastic polymer and the gas releasing composition has a higher bulk density than gas releasing composition and is a substantially free-flowing non-dusting powder. In another aspect, the invention provides a polymeric matrix comprising the biocidal composition and a second thermoplastic polymer. Both the biocidal composition and the biocidal composition in the polymeric matrix are suitable for commercial manufacture of extruded, injection molded or blow molded articles, films, sheets, and the like.

Abstract: In one aspect, the invention is directed to a biocidal composition, comprising a mixture of (a) a substantially oxidation-resistant thermoplastic polymer having a melting point of about 60° C. to about 100° C.; and (b) a composition for releasing chlorine dioxide gas upon exposure to moisture. In another aspect, the invention provides a polymeric matrix comprising the biocidal composition and having a moisture vapor transmission capability of about 100 to about 1000 grams per 24 hours per square meter per mil of thickness. The invention further provides a manufactured article comprising the biocidal composition, for example manufactured by extrusion, injection molding or blow molding.

Abstract: A multi-layer package structure useful for vapor phase transfer in an ambient atmosphere, wherein said package protects sensitive contents placed therein such as a desiccant, deodorizer or perfumer by containing the product between a vapor impermeable backing layer, a vapor permeable flexible layer, and a vapor impermeable cover layer. The two outer layers of the package are impermeable to both the contents of the package and the exterior atmosphere, preventing the diffusion of the contents into the atmosphere and protecting the package contents from the outside atmosphere. Upon opening the package by separating the peelable impermeable front web from the permeable layer or membrane the vapors from the from the contents are now free to move through the permeable web into the atmosphere.