HUMIDITY CONTROL DEVICE
First Claim
1. A device for adsorbing and releasing moisture for controlling relative humidity in an environment comprising:
- a water adsorptive carrier in a continuous solid phase having a first equilibrium relative humidity at saturation;
a water adsorbed into the carrier;
a humectant salt dissolved in the water, the humectant salt characterized by a second equilibrium relative humidity at saturation, such that the equilibrium relative humidity of the combination of the salt dissolved in water and the carrier is different from the first equilibrium relative humidity; and
a humectant salt in the solid form.
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Accused Products
Abstract
A device for controlling relative humidity in an environment with a solidified humectant composition. The solidified humectant composition is made from a humectant salt, water, and a carrier. The solidified humectant may be formed into a tablet with the aid of a binder, or it may be contained within a thermoformed felt material, a sachet, or a water permeable canister. In a preferred embodiment, the sachet is made of a micro-perforated polyester/paper/polyethylene material. Preferred humectant salts include CaCl2, K2CO3, LiCl, NaCl, K2SO4, and combinations thereof. A preferred embodiment of the present invention includes the use of one or more of: an antimicrobial agent, activated carbon, a volatile organic, a moisture adsorber and an oxygen absorber, in combination with the solidified humectant salt.
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Citations
26 Claims
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1. A device for adsorbing and releasing moisture for controlling relative humidity in an environment comprising:
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a water adsorptive carrier in a continuous solid phase having a first equilibrium relative humidity at saturation; a water adsorbed into the carrier; a humectant salt dissolved in the water, the humectant salt characterized by a second equilibrium relative humidity at saturation, such that the equilibrium relative humidity of the combination of the salt dissolved in water and the carrier is different from the first equilibrium relative humidity; and a humectant salt in the solid form. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24, 25)
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12. A device for adsorbing and releasing moisture for controlling relative humidity in an environment comprising:
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a water vapor-permeable container; and a solidified humectant composition within the container, the solidified humectant composition comprising; a water absorptive carrier in a continuous solid phase having a first equilibrium relative humidity at saturation; a water adsorbed into the carrier; a humectant salt dissolved in the water, the humectant salt characterized by a second equilibrium relative humidity at saturation, such that the equilibrium relative humidity of the combination of the salt dissolved in water and the carrier is different from the first equilibrium relative humidity; and a humectant salt in the solid form. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26)
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Specification