Biaxially oriented polyester film for thermal transfer...

B - Operations – Transporting – 41 – M

Patent

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Details

B41M 5/40 (2006.01) B29C 55/12 (2006.01) B32B 27/36 (2006.01) B41M 5/41 (2006.01) B41M 5/42 (2006.01)

Patent

CA 2309680

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 °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.

L'invention concerne un film orienté biaxialement comprenant un polyester contenant un composant acide dicarboxylique et un composant diol en tant -ue composant constitutif, caractérisé en ce qu'il contient 0,1 à 40 mmol % par rapport au composant acide dicarboxylique d'un sel phosphonium quaternaire d'un acide sulfonique ayant un groupe fonctionnel formant ester, leur fusion présentant une résistivité volumique ca de 6 x 10<8> OMEGA .cm ou moins et présentant une température de sous-crête autre que celle de son point de fusion, mesurée par DSC de 225 DEG C au point de fusion; et un film stratifié comprenant le film précité portant sur au moins une surface une couche facilement adhésive ainsi qu'un procédé de fabrication du film stratifié. Le film orienté biaxialement peut être utilisé comme film polyester destiné à une utilisation dans l'enregistrement par transfert thermique.

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