US 12,281,231 B2
Ink, ink set, ink container, recording method, and recording apparatus
Yukiko Ishijima, Tokyo (JP); Satoshi Kojima, Kanagawa (JP); Takayuki Shimizu, Kanagawa (JP); Shin Hasegawa, Tokyo (JP); Hiroki Kobayashi, Kanagawa (JP); and Yuuki Matsushita, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Appl. No. 17/424,333
Filed by RICOH COMPANY, LTD., Tokyo (JP)
PCT Filed Jan. 21, 2020, PCT No. PCT/JP2020/001958
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2020/153358, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 2019-008424 (JP), filed on Jan. 22, 2019; and application No. 2019-214884 (JP), filed on Nov. 28, 2019.
Prior Publication US 2022/0010159 A1, Jan. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 11/40 (2014.01); B41J 2/175 (2006.01); B41M 5/00 (2006.01); B41M 7/00 (2006.01); C09D 11/101 (2014.01); C09D 11/107 (2014.01); C09D 11/38 (2014.01)
CPC C09D 11/40 (2013.01) [B41M 5/0023 (2013.01); B41M 7/0081 (2013.01); C09D 11/101 (2013.01); C09D 11/107 (2013.01); C09D 11/38 (2013.01); B41J 2/17503 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An ink set for forming multiple layers, the ink set comprising a combination of inks that comprise:
an ink A, which is an active-energy-ray-curable inkjet ink comprising:
a surface tension modifier; and
a monomer having a surface tension of 39 mN/m or greater in an amount of 20% by mass or greater but 48% by mass or less, the surface tension being measured according to a Wilhelmy method;
the monomer including polyethylene glycol (600) diacrylate and/or acryloyl morpholine, and N-vinyl caprolactam and/or tricyclodecane dimethylol diacrylate; and
an ink B, which is an active-energy-ray-curable ink free of the surface tension modifier.