Decorative molded article, method of manufacturing decorative molded article, transfer sheet, and display device

Patent metadata

Field	Value
Publication number	US-11298970-B2
Application number	US-201816625539-A
Country	US
Kind code	B2
Filing date	Jun 6, 2018
Priority date	Jun 28, 2017
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

Provided are a decorative molded article that prevents sparkle and has a high contrast, a method for producing the decorative molded article, and a transfer sheet for use for the decorative molded article. The decorative molded article 10 is provided with a protective layer 2 having unevenness on a resin molded article 1 , wherein in the surface of the protective layer 2 , the arithmetic average roughness (Ra x1 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm, the arithmetic average roughness (Ra y1 ) according to JIS B0601:1994 at a cutoff value of 0.08 mm, and the ten-point average roughness (Rz x1 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm satisfy the following requirements (1) to (3): 0.30≤(Ra x1 −Ra y1 )/Ra y1 ≤0.85 (1), Rz x1 /Ra x1 ≤15.0 (2), Ra x1 ≥0.14 μm (3).

First claim

The invention claimed is:

1. A decorative molded article provided with a protective layer on a resin molded article, wherein:
the protective layer has a region (P) having unevenness, and a region (Q) adjacent to the region (P),
in the surface of the region (P) of the protective layer, the arithmetic average roughness (Ra x1 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm, the arithmetic average roughness (Ra y1 ) according to JIS B0601:1994 at a cutoff value of 0.08 mm, and the ten-point average roughness (Rz x1 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm satisfy the following requirements (1) to (3):
0.30≤( Ra x1 −Ra y1 )/ Ra y1 ≤0.85  (1)

Rz x1 /Ra x1 ≤15.0  (2)

Ra x1 ≥0.14 μm  (3).

2. The decorative molded article according to claim 1 , wherein in the surface of the region (Q) of the protective layer, the arithmetic average roughness (Ra x2 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm satisfies the following requirement (4):
Ra x2 <Ra x1   (4).

3. A transfer sheet having:
a substrate having a region (P′) and a region (Q′) adjacent to the region (P′),
an uneven layer having an uneven profile provided on the region (P′) of the substrate,
a first release layer formed on the uneven profile of the uneven layer,
a second release layer provided on the region (Q′) of the substrate, and
a protective layer formed on the first release layer and the second release layer, wherein:
in the surface of the first release layer, the arithmetic average roughness (Ra x11 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm, the arithmetic average roughness (Ra y11 ) according to JIS B0601:1994 at a cutoff value of 0.08 mm, and the ten-point average roughness (Rz x11 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm satisfy the following requirements (1)′ to (3)′:
0.30≤( Ra x11 −Ra y11 )/ Ra y11 ≤0.85  (1)′

Rz x11 /Ra x11 ≤15.0  (2)′

Ra x11 ≥0.14 μm  (3)′.

4. The transfer sheet according to claim 3 , wherein in the surface of the second release layer, the arithmetic average roughness (Ra x22 ) according to JIS B0601:1994 at a cutoff value of 0.8 mm satisfies the following requirement (4)′:
Ra x22 <Ra x11   (4)′.

5. A method for producing a decorative molded article, comprising:
a step of transferring the protective layer of the transfer sheet of claim 3 onto a resin molded article, and
a step of releasing the first release layer and the second release layer of the transfer sheet.

6. A display device having a decorative molded article of claim 1 on the front surface of a display element.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Hatano Masahiro
• Shimada Takayuki
• Akiyama Kentaro
• Takizawa Kazuki

Classifications

• B32B7/12

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

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• C08J2433/04

  esters · CPC title

• B32B2307/538

  Roughness · CPC title

• C08J2333/12

  Homopolymers or copolymers of methyl methacrylate · CPC title