Devices and methods for controlling headspace humidity and oxygen levels
First Claim
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1. A liquid humidity and oxygen control device for use in an enclosure for maintaining a desired relative humidity and oxygen level of the enclosure, the device comprising:
- a water vapor and oxygen permeable and liquid impermeable pouch, the pouch defining an interior space, and formed from material comprising an oxygen permeability rate comprising, in an atmosphere of approximately 70 degrees F., at least 0.2 ml of headspace oxygen per square inch per 24-hour period; and
an effective amount of a humidity and oxygen control solution disposed within the interior space and comprising a salt solution comprising a nonionic substance selected from the group consisting of propylene glycol, glycerin, and a simple sugar.
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Abstract
A humidity control device for use in maintaining the desired humidity of a closed environment, e.g., a container, while also decreasing headspace oxygen, the device including a water vapor and oxygen permeable pouch, an aqueous salt solution containing humidity controlling salts in combination with salts of ascorbic acid or isomers thereof.
110 Citations
20 Claims
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1. A liquid humidity and oxygen control device for use in an enclosure for maintaining a desired relative humidity and oxygen level of the enclosure, the device comprising:
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a water vapor and oxygen permeable and liquid impermeable pouch, the pouch defining an interior space, and formed from material comprising an oxygen permeability rate comprising, in an atmosphere of approximately 70 degrees F., at least 0.2 ml of headspace oxygen per square inch per 24-hour period; and an effective amount of a humidity and oxygen control solution disposed within the interior space and comprising a salt solution comprising a nonionic substance selected from the group consisting of propylene glycol, glycerin, and a simple sugar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-plastic container defining a volume therein, the container having a lid configured to enclose an opening of the container, and comprising:
a humidity and oxygen control device for maintaining a desired relative humidity and oxygen level within the container, the humidity and oxygen control device comprising; a water vapor and oxygen permeable and liquid impermeable pouch arranged within the container, the pouch defining an interior space, and formed from material comprising an oxygen permeability rate; and an effective amount of a humidity and oxygen control material disposed within the interior space of the pouch and comprising a salt solution comprising a nonionic substance selected from the group consisting of propylene glycol, glycerin, and a simple sugar. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A lid for an enclosure of an opening of a non-plastic container defining a volume therein, the lid comprising:
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a container engaging portion; and a humidity and oxygen control device for maintaining a desired relative humidity and oxygen level within the container, the humidity and oxygen control device comprising; a humidity and oxygen impermeable backing configured to be arranged between the container engaging portion and an opening of the container; coupled to the backing, a water vapor and oxygen permeable and liquid impermeable pouch configured to be arranged within the container, the pouch defining an interior space, and formed from material comprising an oxygen permeability rate; and an effective amount of a humidity and oxygen control material disposed within the interior space of the pouch and comprising a salt solution comprising a nonionic substance selected from the group consisting of propylene glycol, glycerin, and a simple sugar. - View Dependent Claims (18, 19, 20)
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Specification