抄録
The purpose of this experiments was to determine on the decrease of electric resistance of a vinyl cord covering through heating.
As material a vinyl flat cord covering on the market and poly vinyl chloride were used. These materials were heated in the flame of alcohol-lamp or the electric furnace under 100°C～900°C. The measurement of electric resistance and chemical analysis of these calcined products were tested.
The results obtained were as follows,
(1) Hydrogen chloride from calcined poly vinyl chloride in a vinyl cord covering remained as hydrochloric acid and formed calcium chloride in a vinyl cord covering.
(2) The electric resistance of calcined vinyl cord covering decreased less than that of calcined products from poly vinyl chloride for the presence of these hygroscopic products.
