| 摘要 |
PURPOSE:To free an outer panel from the problem of causing distortion, by elevating the temp. of an inner panel to a point higher than that of an outer panel and curing an adhesive interposed between both panels by heating. CONSTITUTION:An outer panel 1 composed of a board made of a 30% glass fiber-filled unsaturated polyester resin is bonded to an inner panel 2 with a two- pack urethane adhesive 3. The adhesive 3 is cured by heating it under such conditions that the temp. of the inner panel 2 is higher by 50 deg.C than that of the outer panel 1, whereby the outer panel 1 is bonded to the inner panel 2. During the course of the curing of the adhesive 3, the rigidity of the outer panel 1 is kept higher than that of the inner panel 2 and a 1-5% reduction in the volume of the adhesive 3 caused by the curing can be absorbed by the inner panel 2 so that the outer panel 2 hardly cause distortion. |
