| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing process for manufacturing a cellulose acylate film having a large width which prevents generation of width deviation, Re is large and no plate like wrinkle is formed. <P>SOLUTION: A cellulose acylate film is stretched in a direction crossing a film transportation direction, followed by heating treatment at a temperature T shown by Tc≤T<Tm<SB>0</SB>under controlling a dimension change in the stretched direction. In the above, Tc is a crystallizing temperature of the cellulose acylate film before heat treatment and Tm<SB>0</SB>is a melting point of this cellulose acylate film before heat treatment. <P>COPYRIGHT: (C)2010,JPO&INPIT |
