| 摘要 |
PURPOSE:To obtain a laminated sheet of a low dielectric constant inexpensively, by adding a surface-treated fluorocarbon resin fiber to a thermosetting resin, impregnating glass cloths with the mixture and laminate-molding the obtained prepregs. CONSTITUTION:5-250pts.wt. fluorocarbon resin fiber subjected to physical and/or chemical surface treatment is added to 100pts.wt. thermosetting resin, and glass woven fabrics or glass cloths are impregnated with the obtained mixture to form prepregs. These prepregs, alone or as an inserted layer of a low dielectric constant, are laminate-molded to give a laminate. As said fluorocarbon resin fibers, a fluoroethylene resin fiber and a tetrafluoroethylene/ hexafluoropropylene copolymer fiber are desirable because of their low dielectric constants. Although the bases used are glass woven or nonwoven fabrics, a glass nonwoven cloth of a high void content is desirable for impregnation with more fluorocarbon resin. |
