EFFECTS OF HUMIDITY ON THE DIMENSIONAL STABILITY OF FLEXIBLE THIN FILM MAGNETIC RECORDING MEDIA

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Abstract

  The hygroscopic expansion of PET films with or without thin metal layer coatings was measured. It was demonstrated that the thin metal layers retarded the rate of deformation of PET films and decreased the dimensional change when they were exposed to moisture. The amount of this change was semi-quantitatively explained by use of a composite model. Diffusion coefficients of moisture in the PET film were obtained for several cases and compared each other. A very small amount of penetration of moisture through metal layers may have been present.

Journal

  • Journal of the Magnetics Society of Japan

    Journal of the Magnetics Society of Japan 13(S_1_PMRC_89), S1_773-777, 1989

    The Magnetics Society of Japan

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