Sheet for sublimation transfer
AssigneeTsuyakin Co., Ltd.
InventorsMasukuni Mori, Osamu Sakurai
Life of this patent
Estimating the term…
Abstract
A sheet for sublimation transfer has an ink layer formed one side of a material sheet. A sublimation transfer ink forming the ink layer contains a binder which does not melt onto a printing medium, such as a printing paper, to which an image is transferred, and will not cause transfer of dyes to the backside of the sheet even when the sheet is rolled and placed in relatively high temperature environment for a long period of time. The binder is composed of vinyl acetal group (X), vinyl alcohol group (Y) ,and vinyl acetate group (Z) as expressed by the following formula (I): ##STR1## wherein R of said polyvinyl acetal resin is C.sub.n H.sub.2n+1, where n is zero or a positive integer greater than or equal to 4.
Claims10
A sheet for sublimation transfer, having a lubricative heat resisting layer on one side of a material sheet and an ink layer formed on the other side of the material sheet, which ink layer is formed by coating a sublimation transfer ink containing binder consisting of polyvinyl acetal resin composed of 80% or more of vinyl acetal group X, 15-20% of vinyl alcohol group Y, and less than 2% of vinyl acetate group Z with respect to a total amount of 100% of said resin, wherein said vinyl acetal group X, vinyl alcohol group Y, and vinyl acetate group Z are expressed by the following formula (I):
- ##STR4## wherein R is an alkyl group of the formula C.sub.n H.sub.2n+1, where n is a positive integer of greater than or equal to 2.
Dependencies are inferred from the claim text.