TWB 06/16 Wasserdampfpermeation durch Hochbarrierefolien

Ansätze für eine beschleunigte Messung

A common approach for the encapsulation of flexible electronic devices is to use high-barrier films with a low water vapor transmission rate (WVTR) to ensure a long life time. Therefore, the determination of
WVTRs needs highly sensitive detection methods and may take several months. This causes considerable difficulties for the development of high-barrier films and their quality control. We present a novel approach for an accurate and rapid determination of WVTRs within a temperature range of 23°C to 80°C and relative humidities from 15% to 90%. The detection limit is below 2∙10-5 g∙m-2∙d-1. In combination with sophisticated theoretical methods, the measurement times can be significantly reduced.

Keywords: „water vapor transmission rate“ „WVTR“ „permeation measurement“ „finite element method“ „high-barrier films“

Schlagworte: “Wasserdampfdurchlässigkeit“ „WVTR“ „Permeationsmessung“ „Finite Elemente Methode“ „Hochbarrierefolien“

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