| 摘要 |
PROBLEM TO BE SOLVED: To produce a lightweight building material such as a metallic panel and a metallic siding in which the filling rate of phenolic resin foam is high and interfacial separation is not caused and adhesive strength is excellent. SOLUTION: A facing S is formed into a shape having side walls on both sides of a flat part by curving and working both side parts in the width direction of a metal band. While continuously feeding the facing S, liquid resol type phenol resin R is supplied to the central part in the width direction of the flat part, The resol type phenol resin R is divided into two in the vicinity of the center by two knife coaters 10, 20 which are tilted in the direction orthogonal to the carrier direction D of the facing S and arranged, and is spread in the longitudinal direction and the width direction of the facing. Then, backing material is superposed on the facing S and the resol type phenol resin R is heated and foamed. |
