Packaging for controlled release of volatile substances

Details Packaging for controlled release of volatile substances Packaging for controlled release of volatile substances

1977-09-15

1979-03-20

Reeves, Robert B.

Fluid sprinkling, spraying, and diffusing

Slow diffusers

Liquid supply in absorbent or porous media only

53478, 156289, 156290, 2064842, 428 43, 428905, A61L 904

Patent

active

041450019

ABSTRACT:
A package having plural layers with a quantity of volatile substance such as deodorizer sandwiched between the layers. The outer layers of the laminate are impermeable to the substance and its vapors, and thus prevent escape of the vapors as long as the package is sealed. Upon opening of the package, delamination occurs at the interface between two selected layers such that the volatile substance is covered on one side only by a layer of material which is permeable to the vapors, thereby allowing controlled release of the vapors over a period of time. A process for production of such packages is also disclosed.

REFERENCES:
patent: 2615754 (1952-10-01), Lindenberg
patent: 2626833 (1953-01-01), Valentine
patent: 3685734 (1972-08-01), Paciorek et al.
patent: 3785556 (1974-01-01), Watkins
patent: 3995739 (1976-12-01), Tasch et al.

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