接着剤を浸み込ませたろ紙の燃え拡がり機構

概要

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This paper presents the results of a study to elucidate the mechanisms of the flame spread over a filter paper permeated with an adhesive. For this study, two typical adhesives used for general purposes are adopted. One is polyvinyl acetate resin, and the other is urea resin. The flame spread rates and temperature profiles near leading flame edges were measured. Also, thermogravimetric analyses of the samples were performed. It was found that flame spread depends strongly on the pyrolysis reaction of the permeated adhesive. The highest pyrolysis temperature is of the pure filter paper, and the pyrolysis temperature decreases with the increase of either of permeated adhesives. Also, the flame spread rate decreases with the increase of the permeated adhesive. The decrease of the heat flux from the gas phase to the sample surface is inferred to be a main cause to decrease the flame spread rate with the increase of the amount of the permeated polyvinyl resin. For urea resin, establishment of a residual carbon layer is inferred to be a main cause of the flame spread rate reduction. Carbon-dioxide ejection during pyrolysis reaction, which is inferred through the thermogravimetric analyses, is supposed to enhance the flame spread rate reduction.
千葉科学大学の論文
2008-02-29