Abstract: A printing sheet of the type which is used in a thermal transfer system, the printing sheet comprising a support and a dye receiving layer formed thereon, the dye receiving layer including a polymer containing isocyanate group, the polymer having polysiloxane unit and urea unit. The isocyanate group-containing polymer is selected from a reaction product between a multifunctional polyisocyanate compound and amino-modified silicone, or a reaction product between a multifunctional polyisocyanate compound and alcohol-modified silicone or carboxyl-modified silicone and an amine compound or water. According to the present invention, both the writing characteristic and anti-sebaceous characteristic on an image surface are improved simultaneously while basic characteristics such as printing sheet sensitivity, image preservative stability, and so on, are satisfied.

Abstract: A thermal transfer dye image-receiving sheet having a high resistance to curling and capable of smoothly travelling through a printer, and recording thereon dye images, includes a substrate sheet formed from a polyolefin resin and inorganic particles and a dye receiving resin layer formed on the substrate sheet, the substrate sheet having a longitudinal thermal shrinkage of 1.5% or less and a transversal thermal shrinkage of 0.5% upon heating from 20.degree. C. to 120.degree. C., and a longitudinal tensile elastic modulus of 50 MPa or less and a transversal tensile elastic modulus of 100 MPa or less at 120.degree. C.

Abstract: An image receiving sheet for thermal transfer printing according to the present invention comprises a dye receiving layer, a foam film, an adhesive layer, a release layer, a support layer and a lubricant layer which are successively laminated. The image receiving sheet for thermal transfer printing has a seal portion consisting of the dye receiving layer, the foam film and the adhesion layer, also having a support portion consisting of the release layer, the support layer and the lubricant layer. The image receiving sheet for thermal transfer printing according to the present invention is formed such that:(1) smoothness of the dye receiving layer is equal to or larger than 2000 seconds;(2) the foam film contains a white inorganic pigment of 5 to 30 weight % and a micro void formed by mixing resins that are not compatible with each other, having a cushion ratio of 5 to 30% and a density of 0.7 to 1.1 g/cm.sup.

Abstract: A printing sheet of the type which is used in a thermal transfer system, the printing sheet comprising a support and a dye receiving layer formed thereon, the dye receiving layer including a polymer containing isocyanate group, the polymer having polysiloxane unit and urea unit. The isocyanate group-containing polymer is selected from a reaction product between a multifunctional polyisocyanate compound and amino-modified silicone, or a reaction product between a multifunctional polyisocyanate compound and alcohol-modified silicone or carboxyl-modified silicone and an amine compound or water. According to the present invention, both the writing characteristic and anti-sebaceous characteristic on an image surface are improved simultaneously while basic characteristics such as printing sheet sensitivity, image preservative stability, and so on, are satisfied.

Abstract: A thermal transfer dye image-receiving sheet capable of receiving clear, uniform colored images without a formation of curls and wrinkles therein, comprising (A) a substrate sheet composed of (a) core sheet having a Young's modulus E.sub.3, (b) a front coated thermoplastic film layer having a thickness T.sub.1 and a Young's modulus E.sub.1, and (c) a back coated thermoplastic film layer having a thickness T.sub.2 and a Young's modulus E.sub.2, the T.sub.1, T.sub.2, E.sub.1, E.sub.2 and E.sub.3 satisfying the following relationships (1) and (2):T.sub.2 .gtoreq.T.sub.1 (1)andE.sub.3 .gtoreq.2E.sub.1 .gtoreq.2E.sub.2 (2)wherein Y.sub.1, Y.sub.2 and Y.sub.3 are determined in accordance with ASTM D882-64T.

Abstract: A thermal transfer image-receiving sheet for a thermal transfer type printer comprises a sheet substrate, a front coating layer formed on the front surface of the sheet substrate and comprising a polyolefin resin, a polyolefin resin back coating layer formed on the back surface of the sheet substrate, and optionally, a surface coating layer formed on the front coating layer and comprising a resinous binder and a pigment.

Abstract: A support sheet useful for a thermal transfer image receiving sheet having a high resistance to thermal curling and capable of recording clear and uniform images or pictures thereon, comprises a sheet substrate with a thickness of 20 to 300 .mu.m, and multilayer front and back surface coating plastic films each comprising a pigment and a polyolefin resin, each having at least one bi-axially oriented base layer, and bonded to the sheet substrate, and satisfies the following relationships:S.sub.1 /S.sub.2 .ltoreq.1/2S.sub.3 <S.sub.1wherein S.sub.1 =heat shrinkage of the front surface coating film, S.sub.2 =heat shrinkage of the back surface coating film and S.sub.3 =heat shrinkage of the sheet substrate, determined at 100.degree..+-.2.degree. C. for 10 minutes in accordance with JIS K-6734-1975.