| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tough protective board excellent in impact resistance as a reinforcement core material and a transparent board which replaces glass. <P>SOLUTION: The protective board 1 has a structure which has a polycarbonate core substrate 2 and three layers of synthetic resin films 4 bonded respectively on one side surface and on the other side surface each by interposing adhesive layer 3. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
