Effect of absorbents on water vapor transmission of free and applied polymer films.
The influence of different types of absorbents on moisture transmission through free (cast films) and applied (coated tablets) polymer films was investigated. In free film studies, lubricated granulations were considered to be the absorbent. The compressed tablet was considered to be the absorbent in applied film studies. The results suggested that, using the same film formulation and film thickness in all cases, the polymer film reduced moisture absorption to the same degree, independent of the absorbent used, suggesting a constant moisture permeation. The results of the free film studies also simulated those of the applied films, allowing the correlation of the data.
D000042:Absorption; D007700:Kinetics; D008567:Membranes, Artificial; D008747:Methylcellulose; D011108:Polymers; D013607:Tablets; D013997:Time Factors; D014867:Water
D008567:Membranes, Artificial; D011108:Polymers; D013607:Tablets; D014867:Water; D008747:Methylcellulose