DESIGN TRANSFER SHEET, AND DECORATIVE FILM, AND METHOD FOR PRODUCING SAME

• US 20170326906A1
• Filed: 12/21/2015
• Published: 11/16/2017
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: YASUDA, Daigo, TAKAMATSU, Yorinobu, KAWAGOE, Minori, NAKAYAMA, Akihiko
• Granted Patent: US 10,774,242 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 27/40 comprising polyurethanes
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B44C 1/1704 Decalcomanias provided with a particular decorative layer, e.g. specially adapted to allow the formation of a metallic or dyestuff layer on a substrate unsuitable for direct deposition B44C1/1716, B44C1/1737 take precedence
• CPC Class Codes: B44C 1/1708 Decalcomanias provided with a layer being specially adapted to facilitate their release from a temporary carrier B44C1/172, B44C1/1741 take precedence
• CPC Class Codes: C09J 5/06 involving heating of the applied adhesive
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22

Abstract

A design transfer sheet of one embodiment of the present disclosure contains a release layer and a design transfer layer releasably mounted on the release layer, and the design transfer layer contains a thermally adherable first surface layer and a thermally adherable second surface layer in that order from the release layer side.

Claims

1. A design transfer sheet for being disposed between a substrate layer and an outermost layer, with the design transfer sheet comprising:

a release layer; and

a design transfer layer releasably mounted on the release layer,

with the design transfer layer including a thermally adherable first surface layer and a thermally adherable second surface layer in that order from the release layer side,

wherein each surface layer of the design transfer layer is disposed between the substrate layer and the outermost layer.

2. The design transfer sheet according to claim 1, wherein at least one of the first surface layer and the second surface layer contains at least one thermoplastic resin selected from the group consisting of vinyl chloride/vinyl acetate copolymer, polyurethane, polyester, (meth)acrylic resin and phenoxy resin.

3. The design transfer sheet according to claim 2, wherein at least one of the first surface layer and the second surface layer contains phenoxy resin.

4. The design transfer sheet according to claim 1, wherein at least one of the first surface layer and the second surface layer contains phenoxy resin and polyurethane.

5. The design transfer sheet according to claim 4, wherein the polyurethane is polyester-based polyurethane.

6. The design transfer sheet according to claim 4, wherein the mass ratio of the phenoxy resin and the polyurethane is from 99:

1 to 30;

70.

7. A decorative film comprising:

the design transfer layer described in claim 1;

a substrate layer disposed on the side of either the first surface layer or the second surface layer of the design transfer layer; and

an outermost layer disposed on the outermost surface on the side of the other of the first surface layer or the second surface layer of the design transfer layer.

8. A decorative film comprising:

the design transfer layer described in claim 3;

a metal brightening layer;

a substrate layer disposed on the side of either the first surface layer or the second surface layer of the design transfer layer; and

an outermost layer disposed on the outermost surface on the side of the other of the first surface layer or the second surface layer of the design transfer layer;

of the first surface layer and the second surface layer of the design transfer layer, the layer that contains phenoxy resin being adjacent to the metal brightening layer.

9. A decorative film capable of covering an article having a three-dimensional shape by heat expansion,

the decorative film comprising:

the design transfer layer according to claim 1;

a polyurethane thermal adhesive layer, which is disposed on the side of either the first surface layer or the second surface layer of the design transfer layer and is thermally adhered to the article during the heat expansion; and

an outermost layer disposed on the outermost surface on the side of the other of the first surface layer or the second surface layer of the design transfer layer,

the polyurethane thermal adhesive layer containing thermoplastic polyurethane selected from the group consisting of polyester-based polyurethanes and polycarbonate-based polyurethanes, and fracture strength of the polyurethane thermal adhesive layer being not less than 1 MPa at 135°

C., and storage modulus at 150°

C. and frequency 1.0 Hz is from 5×

10³ Pa to 5×

10⁵ Pa, and coefficient of loss tan δ

being not less than 0.1.

10. A method for producing a decorative film, comprising the steps of:

preparing a design transfer layer comprising a thermally adherable first surface layer and a thermally adherable second surface layer;

thermally adhering the first surface layer and a first article; and

thermally adhering the second surface layer and a second article.