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专利名称：BIAXIALLY ORIENTED POLYESTER FILMS发明人：SUZUKI, TAKASHI申请号：EP05770379申请日：20050809公开号：EP1806380A4公开日：20100616
摘要：The present invention relates to (1) a biaxially stretched polyester filmcomprising a polyester layer (layer A) which comprises butylene terephthalate units andhas a melting point of not higher than 240°C, said biaxially stretched polyester filmsatisfying such properties that an edge tear resistance in longitudinal direction is smallerthan an edge tear resistance in width direction and the edge tear resistances in each oflongitudinal and width directions are not more than 40N; (2) a biaxially stretched
polyester film having a crystallization temperature (Tc) of not lower than 125°C and edgetear resistances of not more than 80N in each of longitudinal and width directions; and (3)a biaxially stretched polyester film comprising a polyester layer (layer A) comprisingbutylene terephthalate units and polyester layers (layer B) which are laminated on theboth surfaces of the layer A and has a melting point higher 10°C or more, than themelting point of the layer A, said biaxially stretched polyester film satisfying suchproperties that edge tear resistances in each of longitudinal and width directions are notmore than 80N and the tensile break elongation is not more than 50%. The said biaxiallystretched polyester films are excellent in film-forming stability, can be suitably used aspackaging materials instead of the presently used packaging materials such as thecellophane, moisture-proof cellophane and K-coat cellophane, can be used even though
having a laminate structure of only a base film and a sealant layer, and also can exhibits agood hand cut-off property.
申请人：MITSUBISHI POLYESTER FILM CORPORATION
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