Method for diagnosing film degradation
AssigneeAshigara Manufacturing Inc.
InventorsTerumitsu Ishii, Daisuke Yamamoto
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Abstract
An object of the present invention is to provide a novel method for diagnosing film degradation which can identify the degraded state of a film based on a resin more efficiently and reliably than ever. In order to attain this object, a method for diagnosing the degradation of a film based on a resin is adopted, the method comprising using the following analysis method A and/or analysis method B, which is a non-destructive analysis method: analysis method A: confirming the presence or absence of abnormality in the film by visual observation and olfactometry, and analysis method B: confirming the presence or absence of an acid anhydride and a sign of hydrolysis reaction as to the film by Fourier transform infrared spectroscopy analysis.
Claims4
A method for diagnosing degradation of a film based on triacetyl cellulose, the method comprising using the following analysis method B, which is a non-destructive analysis method:
- analysis method B:
- confirming presence or absence of a peak derived from acid anhydride at wave numbers from 1790 cm−1 to 1850 cm−1 of the film by Fourier transform infrared spectroscopy analysis.
Dependencies are inferred from the claim text.