テンター法による同時延伸の分子配向
Molecular Orientation of Biaxally Oriented Films Made by Simultaneous Stretching Tenter
坂本國輔
Sakamoto, Kunisuke
The possibility of making optically uniform PET film in film plane has been theoretically investigated in a tenter process. The result shows that it is possible to make birefringence-free or optically uniform films, only by a simultaneous process, and not by a step-wise process. However optically uniform films can not be produced, if they undergo a heat setting process after stretching because molecular orientation is regenerated during this heat setting process.
Key words: Bowing phenomena / Simultaneous stretching / PET film / Optical anisotropy / Molecular orientation distribution control