| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a prepreg sheet which improves a resin yield in paper making without damaging insulating properties and heat resistance required for a laminated board. SOLUTION: This is a method for producing a prepreg sheet by subjecting a material having a base fiber and an uncured thermosetting resin powder as a major component to a wet type paper making, followed by drying with heating, wherein the average particle size of the uncured thermosetting resin powder is 50-200μm, the ratio of minute particles which are <=10μm is <=10 wt.%, and the ratio of coarse particles which are <=300μm is <=10 wt.%. |
