| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a reversible temp.-sensitive deformable laminate obtained by bonding at least two or more resin layers mutually different in the coefficient of thermal expansion, deformed and deplaced in both upper and rear surface directions by a temp. change, having reversibility between three states of the normal temp., low temp. and high temp. and effective as a main material of a toy or a decorative element. SOLUTION: An adhesive soln. prepared by dissolving an acrylic resin in toluene and ethyl acetate is applied to a high density polyethylene film being a resin layer 2B to form an adhesive layer 3 and, after the solvents are evaporated, a stretched polyethylene film is laminated to the adhesive layer 3 at the normal temp. as a resin layer 2A by a roll to be bonded thereto under pressure to obtain a reversible temp.- sensitive deformable laminate 1. This laminate 1 is in a non-curved state at the normal temp. but curved and displaced toward the resin layer 2A at 40 deg.C or higher and curved and displaced toward the resin layer 2B at 10 deg.C or lower. These curved states are held within the respective temp. regions and, when the laminate 1 is again allowed to stand at the normal temp., the laminate 1 is restored to the non-curved state to be held to this state. As mentioned above, a phase change can be repeatedly performed by a temp. change.</p> |
