IP Library › Granted Patent US 12709691
Granted Patent B2
US 12709691 · App. 18/416,099 · Granted Aug 18, 2026

Ink jet ink composition and recording method

Inventor: Keigo Ando (Matsumoto, JP)
Assignee: SEIKO EPSON CORPORATION
C09D11/30B41J2/01B41J2/18B41J2/2107C09D11/102C09D11/104C09D11/107C09D11/108C09D11/322
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Quick Facts
Patent No.
US 12709691
App. No.
18/416,099
Granted
Aug 18, 2026
Kind
B2
Abstract

An aqueous ink jet ink composition contains first resin particles formed from a resin other than a polyolefin-based resin and second resin particles formed from a polyolefin-based resin, the ink jet ink composition is used by a recording apparatus which has, at an inside of an ink supply path to supply an ink jet ink composition to an ink jet head, a portion in which members are pushed to each other by an external force, and as the second resin particles, resin particles having a specific surface area of 0.18 m 2 /g or less obtained from a relaxation time of a pulse NMR are contained.

Claims (23)

1 . A recording method performed using a recording apparatus which has, at an inside of an ink supply path to supply an ink jet ink composition to an ink jet head, a diaphragm pump or a tube pump having a portion in which members are pushed to each other by an external force, the recording method comprising:

a supply step of supplying an ink jet ink composition to the ink jet head through the ink supply path; and

an ejection step of ejecting the ink jet ink composition from the ink jet head,

wherein the ink jet composition contains:

first resin particles formed from a resin other than a polyolefin-based resin; and

second resin particles formed from a polyolefin-based resin,

wherein, as the second resin particles, resin particles having a specific surface area of 0.18 m 2 /g or less obtained from a relaxation time of a pulse NMR are contained.

2 . The recording method according to claim 1 ,

wherein the specific surface area of the second resin particles is 0.05 to 0.18 m 2 /g.

3 . The recording method according to claim 1 ,

wherein a content of the second resin particles with respect to a total mass of the ink jet ink composition is 0.1 to 5.0 percent by mass.

4 . The recording method according to claim 1 ,

wherein the first resin particles are formed from an acrylic-based resin, an urethane-based resin, or a polyester-based resin.

5 . The recording method according to claim 1 ,

wherein a mass ratio of a content of the first resin particles to a content of the second resin particles is 1 to 5.

6 . The recording method according to claim 1 ,

wherein the recording apparatus is a line printer or a head scan type printer having an ink jet head scan width of 50 cm or more with respect to a recording medium.

7 . The recording method according to claim 1 , further containing at least one organic solvent,

wherein a rate of an organic solvent having a standard boiling point of 190° C. or less with respect to a total mass of the at least one organic solvent is 50 percent by mass or more.

8 . The recording method according to claim 1 , further containing at least one organic solvent,

wherein the highest standard boiling point of the at least one organic solvent is 250° C. or less.

9 . The recording method according to claim 1 , wherein the second resin particles have a volume average particle diameter of 50 to 300 nm.

10 . The recording method according to claim 1 , wherein the recording apparatus has an ink circulation mechanism in the ink supply path.