| 摘要 |
PROBLEM TO BE SOLVED: To provide a light transmission electromagnetic wave shielding laminate which exhibits excellent bendability free of deformation, warpage and peeling by minimizing swaying and residual strain of an adhesion layer even under high temperature bending conditions. SOLUTION: In a method of bending a laminate of 0.1 to 30 mm in thickness formed by laminating a polycarbonate base on one side or both sides of an electromagnetic shield layer through radiation heating by a far infrared heater heating device from both above and below, an upper-stage heater carries out entire-surface heating and a lower-stage heater carries out selective heating within a range such that a heating width of a bent portion is represented by expression (1) of heating width=2πR×(180°-X°)/360°×Y (whereπis the ratio of the circumference of a circle to its diameter, R a radius of curvature, X a bending angle (interior angle), and Y a coefficient (1.35≤Y≤4.15)), and a shield laminate heated at 140 to 185°C by thus controlling a surface temperature difference to≤20°C is bent to have a curved surface of≥10 mm in radius of curvature, thereby obtaining the light transmission electromagnetic wave shielding laminate which exhibits excellent bendability free of deformation, warpage and peeling by minimizing swaying and residual strain of the adhesion layer. COPYRIGHT: (C)2011,JPO&INPIT |
