US 12,228,885 B2
Pressure-responsive particles, cartridge, apparatus for manufacturing printed matter, method for manufacturing printed matter, and printed matter
Takako Kobayashi, Kanagawa (JP); Yoshifumi Iida, Kanagawa (JP); and Takashi Hasegawa, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Oct. 13, 2021, as Appl. No. 17/500,917.
Claims priority of application No. 2021-006588 (JP), filed on Jan. 19, 2021.
Prior Publication US 2022/0229377 A1, Jul. 21, 2022
Int. Cl. G03G 9/087 (2006.01); G03G 9/08 (2006.01); G03G 9/097 (2006.01); G03G 15/00 (2006.01); G03G 15/08 (2006.01)
CPC G03G 9/09733 (2013.01) [G03G 9/0819 (2013.01); G03G 9/0825 (2013.01); G03G 9/09708 (2013.01); G03G 9/09791 (2013.01); G03G 15/0865 (2013.01); G03G 15/6582 (2013.01)] 18 Claims
OG exemplary drawing
 
1. Pressure-responsive particles comprising:
pressure-responsive base particles;
resin particles; and
fatty acid metal salt particles,
wherein the pressure-responsive base particles contain a styrene-based resin that contains styrene and other vinyl monomers as polymerization components and a (meth)acrylic acid ester-based resin that contains at least two kinds of (meth)acrylic acid esters as polymerization components,
a ratio of a mass of the (meth)acrylic acid esters to a total mass of polymerization components is 90% by mass or more in the (meth)acrylic acid ester-based resin,
the pressure-responsive particles have at least two glass transition temperatures,
a difference between a lowest glass transition temperature and a highest glass transition temperature is 30° C. or higher,
a ratio of a mass of the resin particles to a total mass of the pressure-responsive particles is 0.05% by mass or more and 2.0% by mass or less, and
a ratio of a content M2 of the fatty acid metal salt particles to a content M1 of the resin particles satisfies a relationship of 0.01≤M2/M1≤1.0.