Transfer sheet, method for producing exterior member, and exterior member

Patent metadata

Field	Value
Publication number	US-2025381759-A1
Application number	US-202318837716-A
Country	US
Kind code	A1
Filing date	Mar 15, 2023
Priority date	Mar 22, 2022
Publication date	Dec 18, 2025
Grant date	—

Abstract

A transfer sheet for producing an exterior member includes a metal member, the transfer sheet including: a releasing film, and a transfer layer disposed on one surface of the releasing film, wherein the transfer layer includes a first protective layer, a second protective layer, and a pattern layer, in this order from a releasing film side, in a thickness direction; the first protective layer and the second protective layer include a weather resistant agent; the transfer layer includes a low covered area with a hiding power ratio, measured according to JIS K 5600-4-1, of 50% or less; and in the low covered area, an ultraviolet ray transmittance is 1% or less, and a visible light transmittance is 40% or more.

First claim

1 . A transfer sheet for producing an exterior member including a metal member, the transfer sheet comprising:
a releasing film, and a transfer layer disposed on one surface of the releasing film, wherein the transfer layer includes a first protective layer, a second protective layer, and a pattern layer, in this order from a releasing film side, in a thickness direction; the first protective layer and the second protective layer include a weather resistant agent; the transfer layer includes a low covered area with a hiding power ratio, measured according to JIS K 5600-4-1, of 50% or less; and in the low covered area, an ultraviolet ray transmittance is 1% or less, and a visible light transmittance is 40% or more.

2 . The transfer sheet according to claim 1 , wherein a thickness of the transfer layer is 10 μm or more and 30 μm or less.

3 . The transfer sheet according to claim 1 , wherein the first protective layer includes a cured product of an ionizing radiation curable resin composition.

4 . The transfer sheet according to claim 1 , wherein the second protective layer includes a cured product of a thermosetting resin composition.

5 . The transfer sheet according to claim 1 , wherein the first protective layer includes a cured product of an electron beam curable resin composition including urethane (meth)acrylate.

6 . The transfer sheet according to claim 1 , wherein the second protective layer includes a cured product of a thermosetting resin composition including a polycarbonate based urethane acrylic copolymer.

7 . The transfer sheet according to claim 1 , wherein the first protective layer includes at least one of an ultraviolet absorber and a photostabilizer as the weather resistant agent.

8 . The transfer sheet according to claim 1 , wherein the first protective layer includes a triazine based ultraviolet absorber as the weather resistant agent.

9 . The transfer sheet according to claim 1 , wherein the second protective layer includes at least one of an ultraviolet absorber and a photostabilizer as the weather resistant agent.

10 . The transfer sheet according to claim 1 , wherein the second protective layer includes a triazine based ultraviolet absorber as the weather resistant agent.

11 . The transfer sheet according to claim 1 , wherein a 60° gloss value of a surface of the releasing film that is opposite to the transfer layer is 25% or more.

12 . The transfer sheet according to claim 1 , wherein an arithmetic average surface roughness Sa of a surface of the releasing film that is opposite to the transfer layer is 0.5 μm or less.

13 . The transfer sheet according to claim 1 , wherein an FI value of the metal member is 20 or more and 25 or less; and
when a stacked body is formed by stacking the transfer sheet on the metal member via an adhesive layer so that a pattern layer side surface faces the metal member, and peeling the releasing film off, an FI value (measured from a transfer layer side) of the low covered area in the stacked body is 10 or more.

14 . The transfer sheet according to claim 1 , wherein the metal member is an aluminum member.

15 . A method for producing an exterior member including a metal member, the method comprising:
a preparing step of preparing the transfer sheet according to claim 1 ; and a stacking step of stacking the transfer sheet on the metal member via an adhesive layer so that a pattern layer side surface of the transfer sheet faces the metal member.

16 . The method for producing an exterior member according to claim 15 , further comprising, after the stacking step, a peeling step of peeling the releasing film off from the transfer sheet.

17 . An exterior member including a metal member, the exterior member comprising:
a first protective layer; a second protective layer; a pattern layer; an adhesive layer; and the metal member in this order, in a thickness direction, wherein the first protective layer and the second protective layer include a weather resistant agent; an FI value of the metal member is 20 or more and 25 or less; and the exterior member includes an area with an FI value, measured from a first protective layer side, of 10 or more.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Akita Yasuhiro
• Furuta Satoshi
• Hayashi Yumiko
• Sugita Natsuo
• Miyazaki Saori

Classifications

• B32B2307/712

  Weather resistant · CPC title

• B32B2307/406

  Bright, glossy, shiny surface · CPC title

• B32B15/095

  comprising polyurethanes · CPC title

• B32B15/082

  comprising vinyl resins; comprising acrylic resins · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title