The present invention relates to wetness indicator compositions that comprise at least one leuco dye and one color developer in a hot-melt adhesive matrix. Upon contact with water or with water-containing fluids, said wetness indicator compositions are apt to change their color from a colorless state to a colorful state or from a first colored state to a second colored state having a color different from the first one; in particular, from a first colorless, white, or translucent state to a second state having a visible color, or vice versa. The disclosed wetness indicator compositions can be used as wetness/fluid indicators in various applications, e.g. in packaging articles and in absorbent articles; in an absorbent mat or sheet or operatory cloth for medical use; in a wound dressing product; in an absorbent mat or sheet for food products.
本发明涉及湿度指示剂组合物,该组合物在热熔胶基质中包含至少一种白兰地
染料和一种
显色剂。当与
水或含
水液体接触时,所述湿度指示剂组合物会从无色状态变为有色状态,或从第一种有色状态变为第二种有色状态,第二种有色状态的颜色与第一种有色状态的颜色不同;特别是从第一种无色、白色或半透明状态变为第二种具有可见颜色的状态,反之亦然。所公开的湿度指示剂组合物可在各种应用中用作湿度/流体指示剂,例如在包装物品和吸
水物品中;在医疗用吸
水垫或吸
水片或操作布中;在伤口敷料产品中;在食品用吸
水垫或吸
水片中。