Wetness indicator having varied hues
AssigneeKimberly-Clark Worldwide, Inc.
InventorsXuedong Song, Karen Meloy Goeders, Ning Wei
Life of this patent
Estimating the term…
Abstract
A wetness indicator material may be used on a substrate to form a wetness sensor. The sensor may show either the presence or absence of an aqueous-based fluid or water-containing medium, such as vaginal fluid or urine in a personal hygiene article. The wetness sensor may be incorporated into the article. The wetness indicator material includes a standard colorant that does not change color when wetted. The standard colorant increases the range of hues exhibited by the wetness indicator material.
Claims17
A sensor for detecting the presence of an aqueous-based liquid in a personal hygiene article, the sensor comprising:
- a first layer comprising a first wetness indicating material adapted to change from colored to colorless when in contact with an aqueous liquid, the first wetness indicating material having a first hue;
- and
- a second layer comprising a second wetness indicating material adapted to change from colorless to colored when in contact with an aqueous liquid, the second wetness indicating material having a second hue;
- wherein the first hue and the second hue are two secondary colors, two primary colors, or an unrelated primary and secondary color.
A sensor for detecting the presence of an aqueous-based liquid in a personal hygiene article, the sensor comprising:
- a first layer comprising a first wetness indicating material adapted to change from colored to colorless when in contact with an aqueous liquid;
- a second layer comprising a second wetness indicating material adapted to change from colorless to colored when in contact with an aqueous liquid;
- and
- at third layer comprising a water soluble film separating the first layer from the second layer.
Dependencies are inferred from the claim text.