Epoxyharz Glasmatte und Verfahren und Vorrichtung zu ihrer Herstellung

摘要

A glass-cloth epoxy sheet is manufactured by impregnating a varnish, which is prepared by dissolving a curing epoxy resin composition into a solvent, into glass cloth and curing the varnish. If a thickness X of the glass-cloth epoxy sheet ranges from 20 to 75 mu m, the content of the glass cloth is set within the range of 0.4X + 25 (wt%) to 70 (wt%). If the thickness X of the epoxy sheet ranges between 75 and 200 mu m, the content of the glass cloth is set at 55 (wt%) to 70 (wt%). With this content of the glass cloth, a glass-cloth epoxy sheet with good punching characteristics can be obtained. In a method of manufacturing a glass-cloth epoxy sheet excellent in smoothness, fuzz properties, and flexibility, glass cloth is pulled up vertically from an impregnating tank containing a varnish. The varnish is kept out of contact with anything while being cured.