Thermal transfer sheet, thermal transfer method and thermal tranfer system
AssigneeDai Nippon Printing Co., Ltd.
InventorKeisuke Eiki
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Abstract
The present invention provides a thermal transfer sheet, a thermal transfer method and a thermal transfer system using said thermal transfer sheet. The thermal transfer sheet provided with a coloring layer disposed on the substrate, wherein the coloring layer is formed of a mixture comprising a copolymerization product (A) obtainable by polymerizing an α-olefin/a maleic acid anhydride copolymer with a maleic acid anhydride monoester and an ethylene/vinyl acetate copolymer (B). The thermal transfer sheet is superior in storage stability in a coiled state, anti-background soiling property and the adaptability to high-speed printing, and also capable of forming a print products having excellent functions as to durability such as wear resistance and heat resistance.
Claims10
A thermal transfer sheet comprising a substrate and a coloring layer disposed on one side of the substrate, wherein the coloring layer is formed of a mixture comprising a copolymerization product (A) which is obtainable by polymerizing an α-olefin/a maleic acid anhydride copolymer with a maleic acid anhydride monoester and an ethylene/vinyl acetate copolymer (B) which comprises a high viscous ethylene/vinyl acetate copolymer having a melt index in a range of 5 to 150 and a low viscous ethylene/vinyl acetate copolymer having a melt index in a range of 150 to 2400.
A thermal transfer method comprising steps of:
- providing a thermal transfer sheet comprising a substrate and a coloring layer disposed on one side of the substrate, wherein the coloring layer is formed of a mixture comprising a copolymerization product (A) which is obtainable copolymerizing an α-olefin/a maleic acid anhydride copolymer with a maleic acid anhydride monoester and an ethylene/vinyl acetate copolymer (B) which comprises a high viscous ethylene/vinyl acetate copolymer having a melt index in a range of 5 to 150 and a low viscous ethylene/vinyl acetate copolymer having a melt index in a range of 150 to 2400, and
- carrying out the printing by heating the thermal transfer sheet by means of a thermal transfer printer having an end face type thermal head.
A thermal transfer system comprising:
- A thermal transfer sheet comprising a substrate and a coloring layer disposed on one side of the substrate, wherein the coloring layer is formed of a mixture comprising a copolymerization product (A) which is obtainable by polymerizing an α-olefin/a maleic acid anhydride copolymer with a maleic acid anhydride monoester and an ethylene/vinyl acetate copolymer (B) which comprises a high viscous ethylene/vinyl acetate copolymer having a melt index in a range of 5 to 150 and a low viscous ethylene/vinyl acetate copolymer having a melt index in a range of 150 to 2400, and
- a thermal transfer printer having an end face type thermal head for heating the thermal transfer sheet according to the image information.
Dependencies are inferred from the claim text.