Biaxially oriented film

Details Biaxially oriented film Biaxially oriented film

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) B29C 55/12 (2006.01) G03C 1/795 (2006.01) G11B 5/73 (2006.01)

Patent

CA 2275666

A biaxially oriented polyethylene naphthalate copolymer film, characterized in that: (1) the film is made substantially of a polyethylene naphthalate copolymer comprising 90 to 99.9 mole % (based on the total of the repeating units) of ethylene 2,6-naphthalate units and containing an isophthalic acid component or a decalin-2,6- dicarboxylic acid component in an amount of 0.1 to 10 mole % based on the total of the dicarboxylic acid components, (2) the Young's moduli of the film in the lengthwise and widthwise directions are each 500 kg/mm2 or above, (3) the plane orientation coefficient of the film is 0.230 to 0.275, and (4) the density thereof is 1.350 g/cm3 or above.

Un film copolymère en polyéthylène naphtalate à orientation biaxiale se caractérise en ce que: (1) le film est principalement constitué d'un copolymère de polyéthylène naphtalate contenant de 90 à 99,9 moles % (sur la base de la totalité des unités récurrentes ) d'unités d'éthylène 2,6-naphtalate et contient un constituant acide isophtalique ou un constituant décaline-2,6-acide dicarboxylique suivant une quantité comprise entre 0,1 et 10 moles % sur la base de la totalité des constituants acide dicarboxylique, (2) les modules de Young du film dans le sens de la longueur et de la largeur sont chacun supérieurs ou égaux à 500 kg /mm<2>, (3) le coefficient d'orientation dans le plan du film se situe entre 0,230 et 0,275, et (4) la densité du film est supérieure ou égale à 1,350 g/cm<3>.

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