Abstract: The invention concerns a polymer composition, comprising: a thermoplastic base polymer, an inorganic desiccant material, preferably selected from the group comprising molecular sieves, zeolites, silica gel, clay, hydrate salts, metal oxides and mixtures thereof, and an additive. The invention also concerns a method of producing the polymer composition as well as an article of manufacture comprising the polymer composition. In addition, the invention concerns the use of a polyether block amide as an additive in a polymer composition comprising a base polymer and an inorganic desiccant material, preferably selected from the group comprising molecular sieves, zeolites, silica gel, clay, hydrate salts, metal oxides and mixtures thereof.

Abstract: A polymer composition including a thermoplastic base polymer, and an inorganic desiccant material, selected from the group consisting of molecular sieves, zeolites, silica gel, clay, hydrate salts, metal oxides and mixtures thereof, and an additive, as well as methods of producing the polymer composition and an article of manufacture of the polymer composition.

Abstract: A method of manufacturing a humidity control device including the steps of: a) providing an envelope in an open configuration; b) introducing in at least one part of the open envelope a given weight of a humidity control agent having a known moisture content lower than the moisture content corresponding to a targeted equilibrium relative humidity level (ERHi); c) introducing a given weight of water in the at least one part of the open envelope; and d) repeating steps b) and c) until a desired weight of hydrated humidity control agent is received in the at least one part of the open envelope.

Abstract: A humidity control device, configured to maintain the relative humidity in an enclosure within a given range by absorbing or releasing water vapor, includes an envelope and a humidity control agent arranged inside the envelope. The envelope is liquid water resistant and water vapor permeable. The humidity control agent includes a hydrated superabsorbent polymer having an adjusted moisture content selected to provide a targeted equilibrium relative humidity (ERHi) situated in the range of 45% RH to 90% RH in a sealed container.

Abstract: A polymer composition including a thermoplastic base polymer, and an inorganic desiccant material, preferably selected from the group consisting of molecular sieves, zeolites, silica gel, clay, hydrate salts, metal oxides and mixtures thereof, and an additive. Also disclosed are methods of producing the polymer composition as well as an article of manufacture of the polymer composition.