US 12,303,937 B2
Decorative sheet and method for producing decorative sheet
Masashi Hattori, Tokyo (JP); Erika Akutsu, Tokyo (JP); Yuki Takabayashi, Tokyo (JP); and Yusuke Iijima, Tokyo (JP)
Assigned to TOPPAN HOLDINGS INC., Tokyo (JP)
Filed by TOPPAN HOLDINGS INC., Tokyo (JP)
Filed on Jun. 6, 2024, as Appl. No. 18/735,518.
Application 18/735,518 is a continuation of application No. PCT/JP2022/045138, filed on Dec. 7, 2022.
Claims priority of application No. 2021-198489 (JP), filed on Dec. 7, 2021.
Prior Publication US 2024/0316593 A1, Sep. 26, 2024
Int. Cl. B05D 5/02 (2006.01); B05D 3/06 (2006.01); B32B 3/30 (2006.01); B32B 27/16 (2006.01); B32B 27/30 (2006.01); B44C 5/04 (2006.01); C09D 4/00 (2006.01); C09D 5/28 (2006.01)
CPC B05D 5/02 (2013.01) [B05D 3/065 (2013.01); B05D 3/068 (2013.01); B32B 3/30 (2013.01); B32B 27/16 (2013.01); B32B 27/308 (2013.01); B44C 5/0476 (2013.01); C09D 4/00 (2013.01); C09D 5/28 (2013.01); B05D 2502/005 (2013.01); B05D 2518/00 (2013.01); B32B 2307/408 (2013.01); B32B 2307/538 (2013.01)] 8 Claims
OG exemplary drawing
 
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 includes, on a surface thereof, a ridged portion protruding in a ridged pattern to form an irregular shape,
the irregular shape of the surface protection layer has RSm/Ra within a range of 10 or greater and 300 or less,
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 structure, a propylene oxide structure, and an ε-caprolactone structure, and
a ratio of a number of carbon atoms having only single bonds in the main component of the ionizing radiation-curable resin to a total number of carbon atoms in the main component of the ionizing radiation-curable resin (the number of carbon atoms only having single bonds/the number of all carbon atoms) falls within a range of 0.725 or greater and 0.955 or smaller.