There are provided a useful resin composition for a back-surface layer and a heat-sensitive transfer recording material using the same, wherein under the circumstances where the temperature of thermal heads has been increased, the back-surface layer of the formed heat-sensitive transfer recording material has more excellent heat resistance, damage to a thermal head can be alleviated, and durability is excellent in that bleeding is suppressed even if the silicone content is increased. The present invention provides a resin composition for a back-surface layer to be used for forming a back-surface layer of a heat-sensitive transfer recording material, the resin composition containing, as film-forming components, a siloxane-modified urethane- or urea-based resin A, a resin B, and a cross-linking agent C, wherein the resin A contains a polysiloxane component in a range of 5 to 55%, the resin B has at least one active-hydrogen-containing group and has a glass transition point of lower than 100? C., and when the total amount of the resin A, resin B, and the cross-linking agent C is assumed to be 100%, the resin A is contained within a range of 1 to 79%, the resin B is contained within a range of 1 to 79%, and the cross-linking agent C is contained within a range of 20 to 80%. The present invention also provides a heat-sensitive transfer recording material using the resin composition for a back-surface layer.

To provide a coating liquid for release layer with which a release layer having a small variation in the performance difference can be stably formed, to provide a method for producing a thermal transfer sheet using this coating liquid for release layer, and to provide a thermal transfer sheet having stable releasability. A thermal transfer sheet having a substrate, a release layer provided on the substrate, and a transfer layer provided on the release layer, wherein the transfer layer is provided peelably from the release layer, and the release layer contains a silsesquioxane.

To provide a thermal transfer sheet capable of preventing print omission from occurring on a transfer layer to be transferred and producing of a print having a good gloss. A back face layer 20 is provided on one surface of the substrate 1 and a transfer layer 10 is provided on the other surface of the substrate, the transfer layer 10 has a single-layer or layered structure including a protective layer 5, the back face layer contains spherical particles 25, and when the surface of the back face layer is observed using a scanning electron microscope (SEM) at a magnification of 5000 times, the proportion of the total of the projected areas of the spherical particles is 1.8% or more and 20% or less based on the area of the entire observed surface.

Provided is a thermal transfer sheet enabling printing suitability on high temperature printing to be good. A thermal transfer sheet 100 in which either one or both of a colorant layer 3 and a transfer layer 10 are provided on one face of a substrate 1, and a back face layer 20 is provided on the other face of the substrate 1, wherein a back face primer layer 25 is provided between the substrate 1 and the back face layer 20, and the back face primer layer 25 contains at least one component selected from a silicone resin, a siloxane cross-linked resin, and a silica-introduced resin.

The present invention is directed to a composition and method of providing a silicone release coating material for a thermally-responsive record material while maintaining strong printability with UV inks and water based inks, as well as scuff resistance. The thermally-responsive record material includes a substrate with first and second surfaces. The first surface includes a heat sensitive coating having a colorless dye precursor and an acidic developer material in contiguous relationship. The release coating is provided with an aqueous mixture of a water soluble or water dispersible polymeric material, a silicone release agent, an excess of platinum catalyst, and a hydrophilic silica. The platinum catalyst is preferably provided in excess of 150 ppm. The hydrophilic silica is preferably fumed silica. The release coating is cured at a temperature of 160 C. or less, or even from 70 C. to 120 C.

A heat-sensitive recording material has a web-shaped substrate, having a front side and a reverse side opposite the front side, a heat-sensitive recording layer disposed to the front side of the web-shaped substrate, including at least one dye precursor and at least one (color) developer reactive with this at least one dye precursor. A front-side surface of the heat-sensitive recording material is formed dehesively with respect to layers of adhesive applied to the reverse side of the web-shaped substrate. The dehesive front-side surface includes a furnish which is disposed above the heat-sensitive recording layer and comprises at least one release agent. A diffusion layer is formed between the furnish and the heat-sensitive recording layer. A method for producing a heat-sensitive recording material of this kind, and possibilities for its use.

There are provided a useful resin composition for a back-surface layer and a heat-sensitive transfer recording material using the same, wherein under the circumstances where the temperature of thermal heads has been increased, the back-surface layer of the formed heat-sensitive transfer recording material has more excellent heat resistance, damage to a thermal head can be alleviated, and durability is excellent in that bleeding is suppressed even if the silicone content is increased. The present invention provides a resin composition for a back-surface layer to be used for forming a back-surface layer of a heat-sensitive transfer recording material, the resin composition containing, as film-forming components, a siloxane-modified urethane- or urea-based resin A, a resin B, and a cross-linking agent C, wherein the resin A contains a polysiloxane component in a range of 5 to 55%, the resin B has at least one active-hydrogen-containing group and has a glass transition point of lower than 100? C., and when the total amount of the resin A, resin B, and the cross-linking agent C is assumed to be 100%, the resin A is contained within a range of 1 to 79%, the resin B is contained within a range of 1 to 79%, and the cross-linking agent C is contained within a range of 20 to 80%. The present invention also provides a heat-sensitive transfer recording material using the resin composition for a back-surface layer.

There is provided a thermal transfer sheet having satisfactory peelability when a transfer layer is peeled off without being affected by a peeling environment when the transfer layer is peeled off.

A thermal transfer sheet 100 includes a substrate 1 and a transfer layer 10 provided on one surface of the substrate 1, in which the peeling force in a stable period is in the range of 4.6 g/cm or more and 23 g/cm or less when the transfer layer 10 is peeled off at a peeling temperature in the range of 30 C. or more and 70 C. or less and at a peeling angle of 90 while the surface of the transfer layer 10 on the side opposite to the substrate 1 is made to serve as a peeling interface.

The invention relates to a self-adhesive, heat-sensitive recording material, comprising a carrier substrate, a heat-sensitive, color-forming layer that is applied on one side of the carrier substrate and contains at least a non-phenolic color developer in and at least one color former, a siliconized layer on the upper side of the heat-sensitive, color-forming layer that is applied on the carrier substrate, as well as an adhesive layer on the side of the carrier substrate facing away from the heat-sensitive, color-forming layer.

An elongated printing tape includes a heat-sensitive layer, a first protective layer, a second protective layer, and a first adhesive layer. The heat-sensitive layer produce color at temperatures within a prescribed range. The first protective layer is provided on the heat-sensitive layer. The second protective layer is provided on the side of the heat-sensitive layer opposite the first protective layer. The second protective layer contains at least one resin selected from a group consisting of fluorine-based resins, silicone-based resins, olefin-based resins, polyester-based resins, epoxy/polyester-based resins, and silicon-based resins. The first adhesive layer is provided on the side of the second protective layer opposite the heat-sensitive layer. The first adhesive layer contains at least one adhesive selected from a group consisting of (a) emulsion-type adhesive compounded with tackifying resin and containing acrylic polymer and rubber-based adhesive, (b) silicone-based adhesive, and (c) rubber-based adhesive.