ABSTRACT
A new controlled release dispenser has been developed, called controlled release (CONREL) denoting a concept and range of versatile precision vapor dispenser systems made from hollow fibers. Vapor release is activated by cutting the tape, thereby opening the fiber ends. The vaporizable liquid is kept from running out of the hollow fibers by capillary forces. Hollow fibers function both as a reservoir and as a means of control over the dissemination of a vaporizable substance into the atmosphere. Preliminary results for some of the applications will be discussed after considering the mass transport theory for vapor dispensing from hollow fibers. The rate of release of volatile materials can be determined in the laboratory by following the meniscus movement in the hollow fiber via a cathetometer. The desired dose rate of CONREL system is obtained by supplying each component in separate fibers, the number of fibers of each being dependent on the relative delivery rate of each component.
