| 摘要 |
PROBLEM TO BE SOLVED: To provide a polycarbonate resin sheet reduced in expansion and contraction at the time of heating and after heat treatment even if heated to a high temperature near to or above a glass transition point at the time of secondary processing and having excellent dimensional stability not causing the warpage of a formed article. SOLUTION: The polycarbonate resin sheet excellent in dimensional stability is characterized in that heating expansion and contraction ratios when a heating temperature is 180°C satisfy the formula (1): -1.0≤S<SB>TD</SB>≤1.0 and the formula (2): -4.0≤S<SB>MD</SB>≤0.0 [wherein S<SB>TD</SB>is a heating expansion and contraction ratio (%) in a lateral direction and S<SB>MD</SB>is heating expansion and contraction ratio (%) in an extrusion direction] and thickness is 2.0-8.0 mm. COPYRIGHT: (C)2005,JPO&NCIPI |
