HEAT-RESISTANT LUBRICATION LAYER COMPOSITION FOR THERMOSENSITIVE TRANSFER INK RIBBON

摘要

PURPOSE: A thermosensitive transfer ink ribbon is provided that forms a heat-resistant lubrication layer having a network structure via a chemical binding of a curing agent and a binder component or lubricant, respectively. CONSTITUTION: A heat-resistant lubrication layer composition comprises a binder component, a lubricant and an isocyanate curing agent wherein the binder component contains at least one or two hydroxy group-bearing copolymer selected from the group consisting of copolymers of vinyl alcohol-vinyl chloride-vinyl acetate, hydroxy alkylacetate-vinyl chloride-vinyl acetate and vinyl alcohol-maleic acid-vinyl chloride-vinyl acetate in an amount of 4 to 20% by weight of the heat-resistant lubrication layer. The lubricant contains the mixture of one or two more polymers selected from the group consisting of phosphoric ester containing hydroxy group, silicon oil containing hydroxy group and silicon-acrylic polymer containing hydroxy group in an amount of 2 to 20% by weight based on that of binder component(based on solid).