We have proposed the concept and significance of nano-alloyed polymer, which includes nano-dispersed domains, and have developed the biaxially stretched film with higher glass transition temperature and improved dimensional stability as compared with regular poly(ethylene terephthalate) film (Figures 1 and 2). Highly concentrated polyimide master batches are made at much lower temperature compared with regular processing temperature. The nano-alloyed film is obtained by film-making process having biaxial stretching and heat treatment. The nano-sized domains have an important role as pseudo-cross-linkage points, for demonstrating good drawing process ability and high orientation.
- Tetsuya Tsunekawa
- Takuji Higashioji
- Ichiro Ishizuka
