Patent ID: 8034739

Claim:
A method of selecting an appropriate resin bonded sorbent composition which may be used at least for in part making an enclosure to protect contents from external humidity, wherein said enclosure has an internal headspace volume V, a thickness L and a surface area A, said enclosure surrounded by an environment having an external relative humidity h out which is a fraction of a saturated water vapor density ρ sat at a temperature T, said internal volume having a maximum internal relative humidity, said method comprising the steps of: a) selecting a plurality of resins, a plurality of particulate sorbents and a plurality of ratios therebetween to form a plurality of composites, wherein each resin of said plurality of resins has an effective water vapor diffusivity D m and a water vapor solubility coefficient S m and each composite of said plurality of composites has a volume fraction of said resin φ m and a volume fraction of said sorbent φ d ; b) calculating a plurality of failure times for said plurality of composites, wherein each failure time of said plurality of failure times is based on when an internal relative humidity h in of each composite of said plurality of composites is equal to said maximum internal relative humidity; c) determining which of said plurality of failure times is greater; and, d) selecting one composite of said plurality of composites based on the result of step (c).