| 摘要 |
PURPOSE:To enhance mechanical strength as a thermal transfer film and adhesion between a resistance layer and a base layer, by using a specified thermoplastic copolymeric polyester as a binder resin for forming a resistance layer. CONSTITUTION:The resistance layer 2 of the current-sensitized thermal transfer film 1 comprises 5-35wt% of conductive dispersed particles and 95-55wt% of a thermoplastic copolymeric polyester which is modified from a polyester comprising terephthalic acid as an acid component and ethylene glycol as a bivalent alcohol component, is soluble in a mixed solvent consisting of methyl ethyl ketone and toluene in a weight ratio of 1:1, and shows no melting point as measured by a differential calorimeter. The resistance layer 2 has excellent heat resistance, favorable dispersibility of conductive carbon black and favorable adhesion to a biaxially stretched polyethylene terephtalate film constituting the base layer 3. |
