| abstract |
The present invention relates to a wetness indicator composition comprising at least one leuco dye and one color former in a hot melt adhesive matrix. Upon contact with water or a fluid comprising water, the wetness indicator composition changes from a colorless state to a colored state or from a first colored state to a second colored state of a color different from the first one; In particular, it has the property of changing from a first colorless, white or translucent state to a second state having a visible color, or vice versa. The disclosed wetness indicator composition can be used in various applications, for example, in packaging and absorbent articles, in absorbent mats or sheets or operating room cloths for medical applications, in wound dressing products, and in absorbent mats for food products. Or it can be used as a wetness / fluid indicator in a sheet. [Selection figure] None |