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AssigneeToyo Boseki Kabushiki Kaisha
InventorsKeizou Kawahara, Shigeto Yoshida, Masayuki Tsutsumi, Daisuke Sakura, Akinobu Nagara, Yoshiko Akitomo, Noriko Takahashi, Naonobu Oda, Kazumoto Imai, Kunio Takeuchi, Hiroshi Nagano, Hisato Kobayashi, Keiji Mori, Yasuhisa Fujita
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The easy-to-tear stretched aliphatic polyester film of the present invention is characterized in that the edge tear strength in the longitudinal direction and the transverse direction is not more than 22 N. The easy-to-tear stretched aliphatic polyester film of the present invention is produced by a method of irradiation of actinic rays on an aliphatic polyester film or a method of film-forming a film obtained by laminating aliphatic polyesters having different melting points in three layers of A/B/A under particular film-forming conditions.
A method, producing a lactic acid-based polyester film comprising:
A method of producing an easy-to-tear stretched aliphatic polyester film comprising a lactic acid-based polyester resin as a main component and having an edge tear strength in the longitudinal direction and the transverse direction of not more than 22 N, comprising, irradiating actinic rays on a stretched aliphatic polyester film.
A method producing an easy-to-bear stretched aliphatic polyester film comprising a lactic acid-based polyester resin as a main component and having a tear energy of 0.2-5 gf·mm/μm, and a tensile impact strength of not less than 0.5 j/mm2, comprising irradiating actinic rays on a stretched aliphatic polyester film.
Dependencies are inferred from the claim text.