Protective layer transfer sheet and intermediate transfer medium

Patent metadata

Field	Value
Publication number	US-9527327-B2
Application number	US-201414780904-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Mar 29, 2013
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

The purpose is to provide a protective layer transfer sheet and an intermediate transfer medium, in which a transfer layer has excellent foil tearing property during transfer and in which sufficient durability can be imparted to the thermally transferred image.
The above problem is solved by a protective layer transfer sheet ( 100 ) in which a transfer layer ( 20 ) is provided on one surface of a substrate ( 1 ) so as to be peelable from the substrate ( 1 ), wherein the transfer layer ( 20 ) comprises a peeling layer ( 2 ) and a protective layer ( 3 ) which are layered in this order from the substrate; wherein the protective layer ( 3 ) includes an acrylic polyol resin having a glass transition temperature (Tg) of more than 80° C. or a polyester polyurethane resin having a glass transition temperature (Tg) of not less than 50° C.; and wherein the peeling layer includes at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins.

First claim

The invention claimed is:

1. A protective layer transfer sheet comprising:
a substrate and a transfer layer peelably provided on a surface of the substrate;
the transfer layer including a peeling layer and a protective layer, layered in this order from the substrate;
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of more than 80° C. having a weight average molecular weight (Mw) in a range of not less than 8000 and not more than 70000; and
the peeling layer including at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins.

2. A protective layer transfer sheet comprising:
a substrate and a transfer layer peelably provided on a surface of the substrate;
the transfer layer including a peeling layer and a protective layer, layered in this order from the substrate;
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of more than 80° C., and the acrylic polyol resin being cured by a curing agent; and
the peeling layer including at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins.

3. The protective layer transfer sheet according to claim 2 , wherein the curing agent is an isocyanate type curing agent selected from a group consisting of XDI type, HMDI type and IPDI type.

4. A protective layer transfer sheet comprising:
a substrate and a transfer layer peelably provided on a surface of the substrate;
the transfer layer including a peeling layer and a protective layer, layered in this order from the substrate;
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of more than 80° C., and the acrylic polyol resin having a hydroxyl value in a range of not less than 10 mg KOH/g and not more than 100 mg KOH/g; and
the peeling layer including at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins.

5. A protective layer transfer sheet comprising:
a substrate and a transfer layer peelably provided on a surface of the substrate;
the transfer layer including a peeling layer and a protective layer, layered in this order from the substrate;
the protective layer including a polyester polyurethane resin having a glass transition temperature (Tg) of not less than 50° C., and further a polyvinyl alcohol resin having a saponification degree of not less than 80% and a number average molecular weight (Mn) of not less than 300 and not more than 100, the polyvinyl alcohol resin being in an amount of not less than 5% by weight and not more than 50% by weight, on the basis of the total solid content of the protective layer; and
the peeling layer including at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins.

6. The protective layer transfer sheet as set forth in claim 5 , wherein the protective layer comprises the polyester polyurethane resin, and further a filler having a particle diameter of not more than 200 nm, the filler being in an amount of not less than 5% by weight and not more than 30% by weight, on the basis of the total solid content of the protective layer.

7. A protective layer transfer sheet comprising:
a substrate and a protective layer peelably provided on a surface of the substrate;
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of more than 80° C., and having a weight average molecular weight (Mw) in a range of not less than 8000 and not more than 70000.

8. A protective layer transfer sheet comprising:
a substrate and a protective layer peelably provided on a surface of the substrate;
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of more than 80° C. and having a hydroxyl value in a range of not less than 10 mg KOH/g and not more than 100 mg KOH/g.

9. A protective layer transfer sheet comprising:
a substrate and a protective layer peelably provided on a surface of the substrate;
the protective layer including an polyester polyurethane resin having a glass transition temperature (T) of not less than 50° C., and further a polyvinyl alcohol resin having a saponification degree of not less than 80% and a number average molecular weight (Mn) of not less than 300 and not more than 100, the polyvinyl alcohol resin being in an amount of not less than 5% by weight and not more than 50% by weight, on the basis of the total solid content of the protective layer.

10. The protective layer transfer sheet as set forth in claim 9 , wherein the protective layer comprises the polyester polyurethane resin, and further a filler having a particle diameter of not more than 200 nm, the filler being in an amount of not less than 5% by weight and not more than 30% by weight, on the basis of the total solid content of the protective layer.

11. A protective layer transfer sheet comprising:
a substrate and a transfer layer peelably provided on a surface of the substrate;
the transfer layer including a peeling layer and a protective layer, layered in this order from the substrate;
the peeling layer including at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins, and
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of not less than 50° C.

12. The protective layer transfer sheet according to claim 11 , wherein the acrylic polyol resin has a weight average molecular weight (Mw) in a range of not less than 8000 and not more than 70000.

13. The protective layer transfer sheet according to claim 11 , wherein the acrylic polyol resin is a cured acrylic polyol resin in which the acrylic polyol resin is cured by a curing agent.

14. The protective layer transfer sheet according to claim 13 , wherein the curing agent is an isocyanate type curing agent selected from a group consisting of XDI type, HMDI type and IPDI type.

15. The protective layer transfer sheet according to claim 11 , wherein the acrylic polyol resin has a hydroxyl value in a range of not less than 10 mg KOH/g and not more than 100 mg KOH/g.

16. An intermediate transfer medium comprising:
a substrate, and a transfer layer peelably provided on a surface of the substrate;
the transfer layer including a peeling layer, a protective layer, and a receiving layer, layered in this order from the substrate;
the peeling layer including at least one selected from a group consisting of polyester resins, acrylic urethane resins, and epoxy resins, and
the protective layer including an acrylic polyol resin having a glass transition temperature (Tg) of not less than 50° C.

Assignees

• Dainippon Printing Co Ltd

Inventors

• OOMURA Junpei
• Hayashi Kenzo
• Oota Mitsuhiro
• Sakamoto Kano
• Yoda Shinya

Classifications

• B41M7/0027 Primary

  using protective coatings or layers by lamination or by fusion of the coatings or layers · CPC title

• B41M5/41

  Base layers {supports or substrates} · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B41M5/44

  characterised by the macromolecular compounds · CPC title

• C09D123/00

  Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers · CPC title