CONTINUOUS MANUFACTURE OF ELECTRICAL LAMINATE

摘要

PURPOSE:To suppress the rapid advance of reaction and to improve productivity by a method in which in curing process, hot blast is first applied onto an uncured laminate, and it is switched over to the hot curing by conduction at the stage where the rate of its curing reaction reaches specified value or less, and then at the stage where the rate of the reaction reaches specified range, the laminate is again cured by hot blast curing. CONSTITUTION:The preheating furnaces 10, 15 by hot blast are provided at the sides upstream and downstream of a double belt press 11 adjacently thereto. The laminate covered with metallic foil and/or mold release film 8 passes the preheating furnace 10, and is pressurized and heated with the double belt press 11, and then passes a post-curing furnace 15, whereby it is cured and becomes a product 20. First, hot blast is applied onto the uncured laminate, and then it is switched over to the hot curing by conduction at the stage where the ratio of curing reaction reaches at most 10%, and at the state where its reaction-ratio reaches at least 15% and at most 80%, the laminate is cured by hot blast curing again. Consequently, the rapid advance of the reaction is suppressed, and its productivity is improved. At the stage where its curing reaction-ratio is at most 105, when it is heated quickly, the foaming of the laminate, the peeling between layers and the separation of mold release film etc. may occur.