US 11,945,252 B2
Recording medium and ink jet recording method
Ryo Taguri, Kanagawa (JP); Shinya Yumoto, Tokyo (JP); Arika Tanaka, Kanagawa (JP); and Toshihiro Omagari, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 2, 2022, as Appl. No. 17/734,954.
Claims priority of application No. 2021-079108 (JP), filed on May 7, 2021; and application No. 2022-063422 (JP), filed on Apr. 6, 2022.
Prior Publication US 2022/0355604 A1, Nov. 10, 2022
Int. Cl. B41M 5/50 (2006.01); B41M 5/00 (2006.01); C08L 23/06 (2006.01)
CPC B41M 5/502 (2013.01) [B41M 5/0023 (2013.01); C08L 23/06 (2013.01); C08L 2205/025 (2013.01); C08L 2207/062 (2013.01); C08L 2207/066 (2013.01)] 10 Claims
 
1. A recording medium comprising:
a substrate;
a first ink-receiving layer; and
a second ink-receiving layer adjacent to the first ink-receiving layer, in this order,
wherein
the first ink-receiving layer contains first inorganic particles having an average primary particle size of 50 nm or less,
the first inorganic particles are particles of at least one material selected from the group consisting of fumed silica, fumed alumina, and hydrated alumina, and
the first ink-receiving layer has a positive surface zeta potential, and
wherein
the second ink-receiving layer contains second inorganic particles having an average primary particle size of 50 nm or less,
the second inorganic particles are particles of at least one material selected from the group consisting of fumed silica, fumed alumina, and hydrated alumina,
the second ink-receiving layer has a negative surface zeta potential, and
the second ink-receiving layer has a thickness of 2 μm to 15 μm.