Package for the controlled release of volatile substances

Details Package for the controlled release of volatile substances Package for the controlled release of volatile substances

1979-10-11

1981-03-10

Ross, Herbert F.

Fluid sprinkling, spraying, and diffusing

Slow diffusers

Solid form vaporizable material

A61L 904

Patent

active

042549108

ABSTRACT:
A packaging system for the controlled release of volatile substances is disclosed. This packaging system comprises a pair of outer vapor-impermeable barrier layers and a vapor-permeable central layer which is bonded to each of the pair of vapor-impermeable outer layers, with the volatile material being contained between the central vapor-permeable layer and each of the outer vapor-impermeable barrier layers. The central vapor-permeable layer is formed from a pair of vapor-permeable webs which are bonded to one another. The strength of the bond holding the vapor-permeable webs together is less than the strength of the bond between the vapor-permeable central layer and each of the outer vapor-impermeable barrier layers such that upon exerting a separating force on the outer vapor-impermeable barrier layers the central vapor-permeable webs will split, forming a pair of vapor-permeating members.

REFERENCES:
patent: 3145112 (1964-08-01), Boegershausen
patent: 3387978 (1968-06-01), Major
patent: 3459117 (1969-08-01), Koch
patent: 3675844 (1972-07-01), Sorrell
patent: 3871518 (1975-03-01), Murray
patent: 3939971 (1976-02-01), Tulis
patent: 4058425 (1977-11-01), Thrun
patent: 4141997 (1979-02-01), Syroha
patent: 4145001 (1979-03-01), Weyenberg

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