幅拘束一軸延伸ポリエチレンテレフタラートフイルムの熱処理,熱水処理による寸法変化と分子配向
Changes of Dimension and Molecular Orientation with Annealing and Boiling of Strip-biaxially Stretched Poly (ethylene terephthalate) Film
佐藤京子・劉 源・波多野靖・日比貞雄・永田紳一・下川順一・高橋清久
Sato, Kyouko / Liu, Yuan / Hatano, Yasushi / Hibi, Sadao / Nagata, Shinichi / Shimokawa, Junichi / Takahashi, Kiyohisa
Poly (ethylene terephthalate) sheets were prepared by T die extrusion. PET sheets were then stretched at a draw ratio 4.0 x 1.0 using a biaxial stretcher. The stretched films were annealed at various temperatures for 5 min. These annealed films were then boiled at 100℃ for 1 h. The dimensional changes of non-annealed and annealed films were explored after boiling at 100℃. Crystallinity measurements were undertaken to relate the dimensional changes for strip-biaxially stretched non-annealed, annealed and boiled PET films. Wide angle X-ray pole figures of strip-biaxially stretched non-annealed, annealed and boiled films were taken to study the preferential orientation of diffracted planes.
Key words: Annealing / Boiling / Dimensional change / Molecular orientation / Poly (ethylene terephthalate) film