Abstract: The present invention provides a system and methods for vapor phase sterilization of mail or other items to be delivered, including sterilization during transit of the parcels. In addition the invention provides compositions and methods for sterilization of personal or domestic items.

Abstract: A photodegradable and fully biodegradable plastic material, which can be molded using conventional molding techniques and which has good physical and mechanical properties includes a blend of polyisoprene and polycaprolactone resins. The material biodegrades in soil and sea water environments. All blend ingredients are completely decomposed by microorganisms. Polyisoprene is a natural polymer present in a large variety of plant species or is man made. Polycaprolactone is a synthetic polymer resin known to be decomposed by microorganisms. The plastic material has thermoplastic properties which permits processing of the material using conventional plastic working techniques. The presence of C.sub.1 -C.sub.15 saturated fatty acids and organic peroxide compatibilizers improve the properties of the blend, especially when large quantities of polyisoprenes are used which allows the production of high quality blown films.