| abstract |
One kind is provided while remaining apparent beautiful, cob webbing will not be caused and can ensure necessary rigid resin battenboard (10).A kind of battenboard (10), comprising: two resin tabulations skin material piece (12) and resin coremaking material (13), resin coremaking material (13) is bonded in two surface layer material tablets (12) in the mode being inserted between two surface layer material tablets (12) respectively, resin battenboard (10) is characterized in that, two resins tabulate skin material piece (12), it is engaged with each other by mutual peripheral part to form hollow portion in inside, the resin coremaking material (13) is configured in the hollow portion, groove portion (93) and recessed portion (89) are equipped on at least side in the surface of the resin coremaking material (13) opposite with two resins tabulation skin material piece (12), wherein, the groove portion (93), the entire surface is surrounded, the recessed portion (89) is connected to the groove portion (93) , and, the atmosphere opening through hole (94) for being connected to the groove portion (93) is equipped with along the thickness direction at least one of two resins tabulation skin material piece (12), to, in the hollow portion, when at least one described surface of the resin coremaking material (13) is with corresponding resin tabulation skin material piece (12) bonding, while air between at least one described surface and corresponding resin tabulation skin material piece (12) is by the groove portion (93) guidance to the recessed portion (89), from exhaust in the atmosphere opening through hole (94). |