BIAXIALLY ORIENTED POLYESTER FILM FOR RIBBON FOR USE IN THERMAL TRANSFER RECORDING, AND LAMINATED FILM COMPRISING THE SAME AND METHOD FOR MANUFACTURE THEREOF

摘要

A biaxially oriented film comprising a polyester comprising a dicarboxylic acid component and a diol component as constituent components, characterized in that it contains 0.1 to 40 mmol % relative to the dicarboxylic acid component of a quaternary phosphonium salt of a sulfonic acid having an ester-forming functional group, the melt thereof has an a.c. volume resistivity of 6 x 10<8> OMEGA cm or less and has a sub-peak temperature other than the melting point thereof as measured by DSC of 225 DEG C to the melting point; and a laminated film comprising the above film having an easily adhering layer on at least one surface thereof and a method for manufacturing the laminated film. The biaxially oriented film can be used as a polyester film for use in thermal transfer recording.