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Development of a mathematical model for the effect of temperature and relative humidity on the water vapour permeability of plastic films
Author(s) -
SamaniegoEsguerra Christine M.,
Robertson Gordon L.
Publication year - 1991
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.2770040203
Subject(s) - relative humidity , permeance , materials science , low density polyethylene , humidity , permeability (electromagnetism) , composite material , water vapor , arrhenius equation , relative permeability , thermodynamics , polyethylene , chemistry , permeation , activation energy , membrane , porosity , organic chemistry , biochemistry , physics
The water vapour permeability constants of three flexible films (LDPE, PET and a laminate of both films) were determined at 20, 30 and 40 °C and from 55 to 90% relative humidities. The relationship between permeability and temperature followed the Arrhenius model for the three films. The relative humidity also influenced the permeability of the films. A mathematical model describing permeance ( P/X ‐ the permeability of laminates or films) as a function of external relative humidity and temperature was developed. The model can be used to predict the permeance of the three films at different temperatures and relative humidities.