Decorative sheet, and method for producing decorative sheet

Patent metadata

Field	Value
Publication number	US-12594741-B2
Application number	US-202418674236-A
Country	US
Kind code	B2
Filing date	May 24, 2024
Priority date	Nov 26, 2021
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A decorative sheet includes a primary film layer and a surface protection layer, the surface protection layer has a gloss level of 15 or less, the surface protection layer includes on a surface thereof a ridged portion protruding in a ridged pattern and thus has an irregular shape formed on the surface, the surface protection layer contains an ionizing radiation-curable resin as a main material, the ionizing radiation-curable resin contains as a main component a trifunctional acrylic resin having a repeating structure, the repeating structure is any of an ethylene oxide, propylene oxide, or & ε-caprolactone structure, the number of repetitions of the repeating structure is 3 or more, and vinyl groups contained in the ionizing radiation-curable resin is 20% or less relative to carbonyl groups contained in the ionizing radiation-curable resin.

First claim

What is claimed is:

1 . A decorative sheet comprising:
a primary film layer; and a surface protection layer disposed on one surface of the primary film layer, wherein the surface protection layer has a gloss level of 15 or less, the surface protection layer includes on a surface thereof a ridged portion protruding in a ridged pattern and thus has an irregular shape formed on the surface, the surface protection layer contains an ionizing radiation-curable resin as a main material, the ionizing radiation-curable resin contains as a main component a trifunctional acrylic resin having a repeating structure, the repeating structure is any of an ethylene oxide, propylene oxide, or ε-caprolactone structure, the number of repetitions of the repeating structure is 3 or more, and vinyl groups contained in the ionizing radiation-curable resin are 20% or less relative to carbonyl groups contained in the ionizing radiation-curable resin.

2 . The decorative sheet of claim 1 , wherein
the irregular shape of the surface protection layer has a ratio RSm/Ra in a range of 10 or more and 300 or less.

3 . The decorative sheet of claim 1 , wherein
the irregular shape of the surface protection layer has a ratio RSm/Ra in a range of 50 or more and 300 or less.

4 . The decorative sheet of claim 1 , wherein
the irregular shape of the surface protection layer has a ratio RSm/Ra in a range of 100 or more and 300 or less.

5 . The decorative sheet of claim 1 , wherein
the surface protection layer has a thickness in a range of 2 μm or more and 20 μm or less.

6 . The decorative sheet of claim 1 , wherein
the surface protection layer includes particles having an average particle size of 10 μm or less.

7 . The decorative sheet of claim 6 , wherein
an addition amount of the particles is in a range of 0.5 parts by mass or more and 10 parts by mass or less, relative to 100 parts by mass of the ionizing radiation-curable resin.

8 . A method for producing the decorative sheet of claim 1 , the method comprising the steps of:
irradiating a surface of an applied ionizing radiation-curable resin with light having a wavelength of 200 nm or less and then irradiating the surface with ionizing radiation or with UV light having a wavelength greater than the light having a wavelength of 200 nm or less to form the surface protection layer including a ridged portion protruding in a ridged pattern.

9 . The method of claim 8 , wherein
the light having a wavelength of 200 nm or less is light having a wavelength of 172 nm.

Assignees

• Toppan Holdings Inc

Inventors

• AKUTSU Erika
• Nishikawa Yohei
• Shimizu Kosuke

Classifications

• B05D5/02

  to obtain a matt or rough surface · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• B05D3/065

  After-treatment · CPC title

• B44C5/0476

  with abrasion resistant properties · CPC title

• B05D3/068

  using ionising radiations (gamma, X, electrons) · CPC title