Apparatus and technique for measuring permeability and permeant sorption
US6964191B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 14, 2003 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Oct 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/082
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is concerned with apparatus and methods for measuring package permeability and/or permeant sorption. The apparatus includes a housing defining an inner sealed chamber that is substantially impervious to a permeant of interest. The chamber has an inlet for introducing an inert medium substantially free of the permeant and an outlet for removing the inert medium. A sensor is positioned within the chamber and to provide signals indicative of permeant concentrations. A sealable opening is provided in the housing for introducing, within the chamber, packages to be measured for permeability and/or permeant sorption. In the method, testing of permeant concentrations is cycled to determine the slope of a time line between a low and a high concentration of the permeant. Humidity and temperature are preferably maintained constant within the chamber during testing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.