Regeneratable dehumidifying bag having doubly-protected humidity indicator

Abstract

A dehumidifying bag includes a water-vapor permeable pouch 1, a desiccant material 2 filled in the pouch 1 for absorbing moisture through the pouch for dehumidifying a surrounding wherein the pouch 1 is placed, and a doubly-protected humidity indicator 3 printed on an outer surface of the pouch 1 for reminding an user for replacing or regenerating the desiccant material 2 when saturated by moisture.

Description

BACKGROUND OF THE INVENTION[0001]European patent application No. 08250385.5, also invented by the present inventor, disclosed a regenerative dehumidifying bag having a humidity indicator printed on an outer surface of the pouch, whereby upon saturation of water vapor as absorbed by the desiccant material in the pouch, a color-changeable marking of the humidity indicator changes the color for reminding the user for replacing or regenerating the desiccant material in the pouch.[0002]However, such a prior art has the following drawbacks:[0003]1.When heating or regenerating the pouch after being saturated with moisture, the water vapor as vaporized may penetrate the color-changeable marking of the humidity indicator to moisten, dissolve and remove the cobalt chloride, to thereby fade the marking color of the humidity indicator gradually.[0004]2. The user, when touching the marking of the humidity indicator, may wet the cobalt chloride by his or her sweat to dissolve and remove the cobal...

AI Technical Summary

Problems solved by technology

1.When heating or regenerating the pouch after being saturated with moisture, the water vapor as vaporized may penetrate the color-changeable marking of the humidity indicator to moisten, dissolve and remove the cobalt chloride, to thereby fade the marking color of the humidity indicator gradually.

2. The user, when touching the marking of the humidity indicator, may wet the cobalt chloride by his or her sweat to dissolve and remove the cobalt chloride, thereby losing its color-changing effect of the humidity indicator.

3. The cobalt chloride as laden in the water vapor when heated or wetted as aforementioned may transfer to the surrounding objects or articles to cause their contamination.

4.Since cobalt chloride has been considered as a carcinogen, the color-changeable marking of the prior art may influence, more or less, the human's health as lacking of outer protective layer on the marking of the humidity indicator. The present inventor has found the drawbacks of the prior art and invented the present dehumidifying bag having a protective layer provided thereon.

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