Title:
SYSTEMS AND METHODS FOR PERMEATION RATE TESTING OF BARRIER FILMS
Document Type and Number:
WIPO Patent Application WO/2012/033648
Kind Code:
A3
Abstract:
The present invention is directed to systems and methods which utilize a cavity ring- down spectroscopy (CRDS) technique implemented for the measurements of vapor transmission rate. In one embodiment, the vapor content to be measured is contained within an optical cavity. Light is then injected into the cavity up to a threshold level and the delay time of the injected light is measured. When the wavelength of the injected light is resonant with an absorption feature of the vapor the decay time increases linearly as a function of vapor content. In this manner, vapor content causes a longer delay time and thus the amount of vapor passing through the film (film permeation rate) can be determined in real-time.
Inventors:
FAMILIA AZIZ MAHFOUD (US)
SHACKLEFORD DAVID S (US)
MEKHILEF NAFIH (US)
ZIMMERMAN MIKE A (US)
SHACKLEFORD DAVID S (US)
MEKHILEF NAFIH (US)
ZIMMERMAN MIKE A (US)
Application Number:
PCT/US2011/049268
Publication Date:
June 14, 2012
Filing Date:
August 26, 2011
Export Citation:
Assignee:
SAINT GOBAIN PERFORMANCE PLAST (US)
FAMILIA AZIZ MAHFOUD (US)
SHACKLEFORD DAVID S (US)
MEKHILEF NAFIH (US)
ZIMMERMAN MIKE A (US)
FAMILIA AZIZ MAHFOUD (US)
SHACKLEFORD DAVID S (US)
MEKHILEF NAFIH (US)
ZIMMERMAN MIKE A (US)
International Classes:
G01N15/08; G01N21/25; G01N31/00
Foreign References:
| US20060181710A1 | 2006-08-17 | |||
| US20080060418A1 | 2008-03-13 | |||
| US20080084561A1 | 2008-04-10 | |||
| US20090133475A1 | 2009-05-28 |
Attorney, Agent or Firm:
ROTHENBERGER, Scott ,D. et al. (Attn. MN IP Docket98 San Jacinto Boulevard, Suite 110, Austin TX, US)
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