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

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

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