| 摘要 |
PURPOSE:To obtain a blow molding method capable of molding a molded form having excellent coatability and surface smoothness and having various size and shapes without generating drawdown by using a polyolefin resin as an internal layer, a polyamide resin as an external layer and an acid modified polyolefin resin as an intermediate layer respectively. CONSTITUTION:Three kinds and three layers of blow molding method is used as the blow molding method, and a polyolefin resin constituting an internal layer is difficult to draw down in a molding process. A polyamide resin organizing an external layer is easy to draw down, but it has excellent coatability and surface smoothness. An acid modified polyolefin resin constructing an intermediate layer has superior adhesive properties to the polyolefin resin constituting the internal layer and the polyamide resin organizing the external layer. Accordingly, the external layer easy to draw down is supported by the internal layer difficult to draw down. |
