Thermal transfer image receiving materials

Claim 2

A thermal transfer image receiving material comprising a support of a paper comprising natural pulp as a principal component, having laminated thereon a layer comprising a polyolefin resin as principal component, and further having thereon a dye image receiving layer, said dye image receiving layer containing a dye-accepting synthetic resin crosslinked by a hardening agent, and said polyolefin resin laminate layer having a thickness of from 5 to 35 μm.

Claim 3

The thermal transfer image receiving material of claim 1, wherein the natural pulp is wood pulp.

Claim 4

The thermal transfer image receiving material of claim 2, wherein the wood pulp is a kraft pulp, a sulfite pulp or a bleached pulp.

Claim 5

The thermal transfer image receiving material of claim 1, wherein the natural pulp includes additionally at least one of a softening agent, a paper strength reinforcing agent, a sizing agent, a filler and a fixing agent.

Claim 6

The thermal transfer image receiving material of claim 1, wherein the support of a paper has a coated layer of a hydrophobic polymer on one side or on both sides thereof.

Claim 7

The thermal transfer image receiving material of claim 1, wherein the polyolefin is a low density polyethylene, a high density polyethylene, a polypropylene or a mixture thereof.

Claim 8

The thermal transfer image receiving material of claim 1, wherein said polyolefin resin layer additionally contains at least one of a pigment, an antioxidant, and a fluorescent whitener.

Claim 9

The thermal transfer image receiving material of claim 1, wherein the material additionally comprises at least one dye image receiving layer capable of taking up and fixing a dye which migrates from a thermal transfer dye donating material as a result of heating.

Claim 10

The thermal transfer image receiving material of claim 8, wherein the dye image receiving layer contains a synthetic resin.

Claim 11

The thermal transfer image receiving material of claim 9, wherein the synthetic resin is an ester bond containing resin, a urethane bond containing resin, an amide bond containing resin, a urea bond containing resin or a highly polar bond containing resin.

Claim 12

The thermal transfer image receiving material of claim 8, wherein the dye image receiving layer additionally contains a high-boiling point organic solvent or a thermal solvent.

Claim 13

The thermal transfer image receiving material of claim 11, wherein the high-boiling point organic solvent is an ester, an amide, an ether, an alcohol, a paraffin or a silicone oil.

Claim 14

The thermal transfer image receiving material of claim 11, wherein the thermal solvent is a compound which is compatible with a dye, which is a solid at normal temperature but which melts when heated and which is not decomposed by heat during thermal activation.

Claim 15

The thermal transfer image receiving material of claim 13, wherein the thermal solvent is a compound having a melting point of from 35° C. to 250° C. and where the inorganic nature/organic nature ratio is less than 1.5.

Claim 16

A thermal recording material comprising (a) a thermal transfer image receiving material comprising a support of a paper comprising natural pulp as a principal component, having thereon a laminate layer comprising a polyolefin resin as a principal component, and further having thereon a dye image receiving layer, said dye image receiving layer containing a dye-accepting synthetic resin crosslinked by a hardening agent, and said polyolefin resin laminate layer having a thickness of from 5 to 35 μm, and (b) a thermal transfer dye donating material place in contact with the thermal transfer image receiving material, such that a dye can be transferred from the donating material to the receiving material.

Claim 17

A thermal recording material comprising (a) a thermal transfer image receiving material comprising a support of a paper comprising natural pulp as a principal component, having thereon a laminate layer comprising a polyolefin resin as a principal component, and further having thereon a dye image receiving layer, said dye image receiving layer containing a dye-accepting synthetic resin crosslinked by a hardening agent, and said polyolefin resin laminate layer having a thickness of from 5 to 35 μm, and (b) a thermal transfer dye donating material place in contact with the thermal transfer image receiving material, such that a dye can be transferred from the donating material to the receiving material.

Claim 18

A thermal transfer image receiving material of claim 1, wherein the synthetic resin for the image receiving layer is a polyester and the hardening agent is an isocyanate.