| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject nonwoven fabric made by a wet papermaking method containing a specific amount of glass chopped strand having a fiber diameter not larger than a prescribed value, capable of retaining strength necessary for passing through a resin-impregnating step and having a good dimensional stability after forming a laminated board. SOLUTION: This glass fiber nonwoven fabric is used for multilayer printed circuit boards and contains glass chopped strand in which fiber diameter is <=5 μm in an amount of >=50 wt.% based on total fiber weight and is prepared by a wet papermaking method. Furthermore, as for the glass fiber nonwoven fabric, one sheet thickness obtained when formed into a laminated board is preferably <=100 μm. |
