| 摘要 |
PROBLEM TO BE SOLVED: To provide a key sheet member having excellent surface strength and uniform metallic luster and its manufacturing method. SOLUTION: A decorative sheet in which a metal thin film layer is at least laminated on the back side of a translucent base substance sheet having 80-93 percent of visible light transmissivity and 5-50 percent of haze is integrally formed with a plurality of transparent resin members to be formed into button portions. In this manufacturing method of the key sheet member, the decorative sheet in which the metal thin film layer is at least laminated on the back side of a translucent base substance sheet having 80-93 percent of visible light transmissivity and 5-50 percent of haze is placed in dies which form a cavity out of one die having a recessed portion to form the button portion of the key sheet member and the other die having a gate to form a transparent resin member on the back side of the key sheet member, and molten resin is injected into the die to integrally form the decorative sheet and the molten resin. COPYRIGHT: (C)2003,JPO |
