Decorative sheet

Patent metadata

Field	Value
Publication number	US-10894394-B2
Application number	US-201716302463-A
Country	US
Kind code	B2
Filing date	Apr 24, 2017
Priority date	May 16, 2016
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

Embodiments relate to a decorative sheet having a hairline design and including successively, from a front surface side thereof, (A) a layer of a transparent resin film and (B) a layer of an ink paint film containing high brightness pigment. A plurality of linear hairline grooves is provided on a surface of the transparent resin film on a side thereof facing (B) the layer of the ink paint film containing the high brightness pigment. The decorative sheet has a surface resistivity of 1×105Ω or more on a rear surface side thereof. When the decorative sheet is placed on a dirt comparison chart created by the NPB in an environment of an illuminance of 600 lux, and is illuminated from below the chart at an illuminance of 17000 lux, a figure having a size of 5 mm2 on the chart can be visually discriminated. When the decorative sheet is placed on a gray scale for soiling stipulated in JIS L0805:2005 in an environment of an illuminance of 500 lux, the color difference between color chips numbers 4 and 5 cannot be visually discriminated.

First claim

The invention claimed is:

1. A decorative sheet, comprising:
sequentially, from a front surface side thereof, (A) a layer of a transparent resin film and (B) a layer of an ink paint film containing a high brightness pigment,
wherein a plurality of linear hairline grooves are formed on a surface of the transparent resin film facing (B), the layer of an ink paint film containing at least one high brightness pigment selected from the group consisting of flakes of aluminum, brass, iron, copper, silver, or gold; glass particles coated with silver, titanium oxide, indium oxide, zinc oxide or tin oxide; pulverized products of a vapor-deposited foil; mica; and pearl powder,
wherein the decorative sheet has a surface resistivity of 1×10 5 Ω or more on a rear surface side thereof,
wherein, when the decorative sheet is placed on the dirt comparison chart available from the National Printing Bureau of Japan in an environment of an illuminance of 600 lux, and is illuminated from below the chart at an illuminance of 17000 lux, a figure having a size of 5 mm 2 on the chart can be visually discriminated,
wherein, when the decorative sheet is placed on a gray scale for assessing staining defined in JIS L 0805:2005 in an environment of an illuminance of 500 lux, a color difference of a color chip number 4-5 cannot be visually discriminated, and
wherein (B) the layer of an ink paint film containing a high brightness pigment has a thickness of 0.1 to 20 μm in a portion other than a contact portion with respect to the hairline grooves.

2. The decorative sheet according to claim 1 , comprising:
sequentially, from a front surface side thereof, (A) the layer of the transparent resin film, (B) the layer of the ink paint film containing the high brightness pigment, and (C) a protective layer, wherein the protective layer (C) has total light transmittance of 5 to 30%.

3. The decorative sheet according to claim 1 , wherein each of the hairline grooves has a depth of 0.05 to 15 μm, a distance between the hairline grooves adjacent to each other is 1 to 500 μm, and on a surface of the transparent resin film where the hairline grooves are formed, any square having a length of 1 mm in a direction perpendicular to the hairline grooves and a length of 1 mm in a parallel direction thereto has one or more portions where a distance between the hairline grooves adjacent to each other is 50 μm or more.

4. The decorative sheet according to claim 1 , wherein the high brightness pigment is formed of aluminum flakes.

5. An article having the decorative sheet according to claim 1 laminated on a surface of a display with a touch panel function such that a rear surface side of the decorative sheet serves as the display side.

6. The article according to claim 5 , further comprising:
one of a glass plate or a transparent resin plate laminated on a surface of the article on a side of (A) the layer of the transparent resin film.

Assignees

• Riken Technos Corp

Inventors

• Inomata Hitomi

Classifications

• B44F1/00

  Designs or pictures characterised by special or unusual light effects · CPC title

• B44C1/225

  by engraving · CPC title

• B44C1/222

  using machine-driven mechanical means · CPC title

• B44C1/10

  Applying flat materials, e.g. leaflets, pieces of fabrics (paperhanging B44C7/00) · CPC title

• B32B2451/00

  Decorative or ornamental articles · CPC title