Pretreatment solution, ink set, and inkjet recording device

Abstract

This technology provides the ability to form highly adhesive images on non-permeable media using water-based inks. [Solution] The pretreatment solution is used for pretreatment of media on which images are recorded using water-based ink. The pretreatment solution contains core-shell particles with 2-ethylhexyl acrylate as the core and benzyl methacrylate as the shell, polyester fine particles, a water-soluble organic solvent, and water. The mass ratio of the core-shell particles to the polyester fine particles is 0.3 to 3.0.

Claims

1. A pre-treatment solution for media in which images are recorded using water-based ink, It contains core-shell particles with 2-ethylhexyl acrylate as the core and benzyl methacrylate as the shell, polyester fine particles, a water-soluble organic solvent, and water. The mass ratio of the core-shell particles to the polyester fine particles is 0.3 or more and 3.0 or less. Pretreatment solution.

2. The pretreatment solution according to claim 1, The aforementioned media is a non-penetrating medium. Pretreatment solution.

3. The pretreatment solution according to claim 2, The polarity term of the surface free energy of the non-penetrating media is 10 mJ / m ２ The following is Pretreatment solution.

4. The device comprises a pretreatment solution according to any one of claims 1 to 3, and an aqueous ink. The aforementioned water-based ink contains a pigment, polyurethane fine particles in a solid content of 3.0% to 10% by mass, and water. Ink set.

5. An inkjet recording apparatus for forming an image on the recording surface of a non-penetrating medium, A pre-treatment unit for applying the ink set pre-treatment solution according to claim 4 to the recording surface, A drying section for drying the recording surface, A recording head that ejects the aqueous ink of the ink set according to claim 4 onto the recording surface, A control unit that controls the execution of the following steps: a pre-treatment step in which the pre-treatment liquid is applied to the recording surface by the pre-treatment unit; a drying step in which the recording surface is dried by the drying unit after the pre-treatment step; and a discharge step in which the water-based ink is discharged onto the recording surface by the recording head after the drying step. An inkjet recording device equipped with the following.

6. An inkjet recording apparatus according to claim 5, The polarity term of the surface free energy of the non-penetrating media is 10 mJ / m ２ The system further comprises a discrimination unit that determines whether or not the following applies: The control unit determines that the polarity term of the surface free energy of the non-penetrating media is 20 mJ / m ２ The above control is performed if it is determined that the following conditions are met. Inkjet recording device.

7. An inkjet recording apparatus according to claim 5, The system further comprises a determination unit that determines the amount of pretreatment liquid to be applied to the recording surface by the pretreatment unit based on the surface free energy of the non-penetrating media, The control unit applies the amount of pre-treatment solution determined by the determination unit to the recording surface, as determined by the pre-treatment unit. Inkjet recording device.

8. An inkjet recording apparatus according to claim 6 or 7, The system further comprises a measuring unit for measuring the surface free energy of the non-penetrating media. Inkjet recording device.

Images