MACDONALD, JOHN GAVIN,BAGWELL, ALLISON SALYER,SMITH, MOLLY K.,FISH, JEFFREY E.,LYE, JASON,CUEVAS, BRIAN J.
申请号：
CA2703075
公开号：
CA2703075C
申请日:
2008.10.20
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
There is provided a moisture indicator for a heat and moisture exchange (HME)device that uses a pre-colorant andan activator applied to an inner surface of the HME device. The colorantundergoes a color change of Delta E(.DELTA.E) of equal toor greater than 3 units upon exposure to moisture but not upon exposure tohigh humidity. The colorant is visually obvious to theunaided human eye under normal light conditions through the body of thedevice. The HME device with the visual indicator formoisture can indicate to the care-giver that it is time to change the HMEdevice.
