| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of distortion of the panel surface after the foaming adhesion process using heating by sequentially stacking an adhesive layer made of thermosetting resin made adhere to the reinforcement surface of a panel, a core material formed of honeycomb material, and a reinforcement layer. SOLUTION: A reinforcement layer interposed between an adhesive layer 1 made adhere to a reinforcement surface of a door panel or the like is formed by a core material 2 (paper roll core) made of honeycomb material having a higher degree of freedom of expansion and contraction in the face direction of a face reinforcement material A as compared with a solid plate-like reinforcement material and smaller heat reserve amount. Therefore, when the door panel is contracted by heat, the core material 2 follows such contraction to be easily deformed, thereby preventing stress from being concentrated in a space up to the door panel to cause distortion of the door panel. Further, as the heat reserve amount in the core material 2 is small, in the door panel, the occurrence of distortion between both members can be restrained by a difference in heat reserve amount between the region with the face reinforcement material A is provided and the region without the face reinforcement material.
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