A package and method for the packaging of contents at a reduced pressure which provides for improved protection of said materials from contamination. The method includes hermetically sealing a gas and vapor impermeable packaging containing both the material, object, and/or device and an adsorbent at elevated temperature. Subsequent cooling of the adsorbent results in the production of a partial vacuum within the packaging. Alternatively, if the packaging is evacuated prior to sealing by use of some mechanical device, the subsequent cooling of the adsorbent results in a further reduction of the interior pressure of the packaging. The improvement is provided by the presence of the cooled adsorbent in the packaging. Due to the presence of the cooled adsorbent within the packaging, the vacuum within the packaging is produced or increased and more readily maintained due to the adsorptive action of the adsorbent. Also, the vapor pressure of any gas or vapor contaminates remaining in the packaging or generated or otherwise released by the materials within or containing this partial vacuum are further reduced by the action of the adsorbent. This rate of this reduction is increased as a result of the partial vacuum within the packaging.
A method is provided for hermetic packaging of unimpregnated and impregnated adsorbents which provides for improved packing densities, reduced attrition losses, and reduced exposure of the adsorbent to environmental or other contamination. Furthermore, the method inherently provides for identification of instances of packaging failure. The method entails hermetically sealing a collapsible gas and vapor impermeable vessel containing an adsorbent which is at an elevated temperature. Subsequent cooling of the adsorbent results in the production of a partial vacuum within the vessel. As a result of this partial vacuum, the environmental atmospheric pressure collapses the vessel to firmly compresses the adsorbent in a hermetically sealed low-pressure environment to provide the stated advantages.
A method for packaging a zeolite adsorbent by introducing the zeolite absorbent into a packaging bag having an opening, a constrictive part and at least two layers including a metal layer, through said opening and constrictive part. The method also includes sealing the bag above the introduced zeolite adsorbent at a first position of the constricted part, introducing a dehydrating agent through the constrictive part, and sealing the bag above the introduced dehydrating agent at a second position of the constricted part, such that the dehydrating agent is disposed between the first and second positions of the constrictive part.
A method for packaging a zeolite adsorbent, which comprises introducing the zeolite adsorbent into a packaging bag having an opening and comprising at least two layers including a metal layer, through said opening, sealing the bag above the introduced zeolite adsorbent, then introducing a dehydrating agent thereon, and sealing the bag above the introduced dehydrating agent.
