초록 ▼

A device for releasing a volatile substance into the environment in a controlled manner comprises a reservoir of substance-absorbent material, for storing the substance, that is encapsulated in an envelope, at least a portion of which comprises a permeable material having porosity at least equal to

A device for releasing a volatile substance into the environment in a controlled manner comprises a reservoir of substance-absorbent material, for storing the substance, that is encapsulated in an envelope, at least a portion of which comprises a permeable material having porosity at least equal to ultramicroporosity. The permeable envelope portion has a greater affinity for the substance than does the reservoir material. The remainder of the envelope comprises a material impermeable to the substance. Accordingly, the substance permeates through the permeable envelope portion to be released therefrom in vapor form into the environment.

대표청구항 ▼

A method for filling a device for releasing a volatile substance into the environment in a controlled manner, the device comprising a reservoir of substance-absorbent material and an envelope encapsulating the reservoir, at least a portion of which has poroSity at least equal to ultramicroporosity a

A method for filling a device for releasing a volatile substance into the environment in a controlled manner, the device comprising a reservoir of substance-absorbent material and an envelope encapsulating the reservoir, at least a portion of which has poroSity at least equal to ultramicroporosity and a greater affinity for the volatile substance than does the reservoir, said method comprising the steps of: A. impregnating a substantially non-volatile substitute substance in the permeable envelope portion, one of the substitute substance and volatile substances being soluble in the other of said substances, and B. introducing, at a later time, the volatile substance into the reservoir, whereby the device may be assembled a substantial time prior to introduction of said volatile substance into the reservoir without damage to said permeable envelope portion.