Peel-off sheet, and combination of peel-off sheet and intermediate transfer medium

Patent metadata

Field	Value
Publication number	US-12459230-B2
Application number	US-202117757569-A
Country	US
Kind code	B2
Filing date	Jan 7, 2021
Priority date	Jan 8, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

The peel-off sheet according to the present disclosure includes a first substrate and a peel-off layer, wherein the peel-off layer contains a vinyl chloride-vinyl acetate copolymer and a crystalline polyester, or the peel-off sheet includes a structural component containing particles, wherein the particle size distribution of the particles contained in the structural component which is determined with a laser diffraction scattering particle size distribution analyzer has a maximum peak at a position of more than 0.2 μm and 5 μm or less.

First claim

The invention claimed is:

1 . A peel-off sheet comprising:
a first substrate; and a peel-off layer, wherein the peel-off layer contains a vinyl chloride-vinyl acetate copolymer, a crystalline polyester, and organic particles, wherein the crystalline polyester has a melting point in a range of 50° C. or more to 150° C. or less, and wherein a content of the organic particles in the peel-off layer is in a range of 10 parts by mass or more to 20 parts by mass or less relative to 100 parts by mass of total content of resin materials in the peel-off layer.

2 . The peel-off sheet according to claim 1 , wherein the crystalline polyester has a glass-transition temperature of −50° C. or more and 50° C. or less.

3 . The peel-off sheet according to claim 1 , wherein the crystalline polyester has a number-average molecular weight in a range of 10,000 or more to 50,000 or less.

4 . The peel-off sheet according to claim 1 , wherein a content of the crystalline polyester in the peel-off layer is in a range of 20 parts by mass or more to 95 parts by mass or less relative to 100 parts by mass of a total content of the vinyl chloride-vinyl acetate copolymer and the crystalline polyester in the peel-off layer.

5 . The peel-off sheet according to claim 1 , wherein a logarithmic damping ratio ΔE of the peel-off layer, the logarithmic damping ratio ΔE being determined by subjecting the peel-off layer to rigid-body pendulum measurement at 100° C., is 0.25 or more.

6 . A peel-off sheet comprising:
a first substrate; and a peel-off layer, wherein the peel-off layer contains a crystalline polyester and organic particles, wherein a logarithmic damping ratio ΔE of the peel-off layer, the logarithmic damping ratio ΔE being determined by subjecting the peel-off layer to rigid-body pendulum measurement at 100° C., is 0.25 or more, wherein the crystalline polyester has a melting point in a range of 50° C. or more to 150° C. or less, and wherein a content of the organic particles in the peel-off layer is in a range of 10 parts by mass or more to 20 parts by mass or less relative to 100 parts by mass of total content of resin materials in the peel-off layer.

7 . The peel-off sheet according to claim 1 , the peel-off sheet comprising a primer layer interposed between the first substrate and the peel-off layer.

8 . A peel-off sheet comprising:
a first substrate; and a peel-off layer, wherein the peel-off sheet comprises a structural component containing particles, wherein the structural component containing particles is the peel-off layer, wherein the peel-off layer contains a vinyl chloride-vinyl acetate copolymer, a crystalline polyester, and organic particles, wherein the crystalline polyester has a melting point in a range of 50° C. or more to 150° C. or less, wherein a particle size distribution of the particles contained in the structural component, the particle size distribution being determined with a laser diffraction scattering particle size distribution analyzer, has a maximum peak at a position of more than 0.2 μm and 5 μm or less, and wherein a content of the organic particles in the peel-off layer is in a range of 10 parts by mass or more to 20 parts by mass or less relative to 100 parts by mass of total content of resin materials in the peel-off layer.

9 . The peel-off sheet according to claim 8 , the peel-off sheet comprising an intermediate layer interposed between the first substrate and the peel-off layer.

10 . The peel-off sheet according to claim 9 , wherein the intermediate layer is a primer layer.

11 . A combination of the peel-off sheet according to claim 1 and an intermediate transfer medium,
wherein the intermediate transfer medium comprises a second substrate and a transfer layer comprising at least a receiving layer.

12 . The combination of the peel-off sheet and an intermediate transfer medium according to claim 11 , wherein the receiving layer contains a vinyl chloride-vinyl acetate copolymer.

13 . The combination of the peel-off sheet and an intermediate transfer medium according to claim 11 , wherein the receiving layer contains a receiving layer polyester.

14 . The combination of the peel-off sheet and an intermediate transfer medium according to claim 13 , wherein the receiving layer polyester is a crystalline polyester, and
wherein the receiving layer crystalline polyester has a melting point in a range of 50° C. or more to 150° C. or less.

15 . The peel-off sheet according to claim 1 , wherein the organic particles are made of a resin.

16 . The peel-off sheet according to claim 15 , wherein the resin is at least one selected from the group consisting of a melamine resin, a benzoguanamine resin, a (meth)acrylic resin, a polyamide, a fluororesin, a phenolic resin, a styrene resin, a polyolefin, a silicone resin, and a copolymer of monomers constituting said resins.

17 . The peel-off sheet according to claim 6 , wherein the organic particles are made of a resin.

18 . The peel-off sheet according to claim 17 , wherein the resin is at least one selected from the group consisting of a melamine resin, a benzoguanamine resin, a (meth)acrylic resin, a polyamide, a fluororesin, a phenolic resin, a styrene resin, a polyolefin, a silicone resin, and a copolymer of monomers constituting said resins.

19 . The peel-off sheet according to claim 8 , wherein the particles are made of a resin.

20 . The peel-off sheet according to claim 19 , wherein the resin is at least one selected from the group consisting of a melamine resin, a benzoguanamine resin, a (meth)acrylic resin, a polyamide, a fluororesin, a phenolic resin, a styrene resin, a polyolefin, a silicone resin, and a copolymer of monomers constituting said resins.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Hirokawa Junko
• Ishida Tadahiro
• Oota Mitsuhiro

Classifications

• B41M5/382

  Contact thermal transfer or sublimation processes (sublistatic printing using a pre-formed image B41M5/035; ink-, dye- or pigment-receptive coatings B41M5/52) · CPC title

• B32B2307/704

  Crystalline · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title