| 摘要 |
Porous core material (48a) of shaped glass fiber board is impregnated with resin only in outer surface portions, the resin is cured, an additional resin casing is formed therearound, and the additional resin is cured. Glass strands may be included with the resin impregnation, and a continuous strand mat (64), a veil mat (62), and glass rovings (70) may be included with the resin encasing. |
