Heat printing sheet and heat printing method

摘要

A heat printing sheet having a pattern of a hot melt ink composition on a base, the improvement comprising using a hot melt ink composition which comprises 5-60 wt. parts of a base polymer of ethylene-vinyl acetate copolymer having 5-50 wt. % of the vinyl acetate content and 4-1000 g/10 min. of a melt index or a mixture of said ethylene-vinyl acetate substituted with 10-60 wt. % of the other polymer; and 20-80 wt. parts of a tackifier selected from terpene resins, hydrogenated dicyclopentadiene resins, lower styrene resins, rosins, rosin polyol esters, hydrogenated rosin and rosin polyol esters and alicyclic hydrocarbon resins and 0.1-30 wt. parts of a pigment or dye, and the hot melt ink composition is melted at 80 DEG -250 DEG C and is coated on an engraved roll and is instantaneously printed on a base of synthetic polymer film having 10-100 of a thickness and smooth surface under 0.5-10 Kg/cm2 (gauge) to form the pattern of the hot melt ink composition having 10-3000 of a thickness.