阅读说明：本技术 水性喷墨用组合物及记录物的制造方法 (Aqueous inkjet composition and method for producing recorded matter ) 是由 山崎聪一 豊田直之 粂田宏明 谷口学 内园骏介 于 2019-11-29 设计创作，主要内容包括：本申请提供水性喷墨用组合物及记录物的制造方法,所述水性喷墨用组合物能够对各种记录介质发挥优异的发色性,另外,所述记录物的制造方法能够制造具有优异的发色性的记录物。本发明的水性喷墨用组合物包含由升华染料、分散染料中的至少一种构成的染料、聚酯以及水,所述聚酯的含量是所述染料的含量的4倍以上且300倍以下。所述聚酯的含量较优选是5质量％以上且30质量％。所述染料的含量较优选是0.1质量％以上且7.5质量％以下。(The present application provides an aqueous ink jet composition capable of exhibiting excellent color developability for various recording media, and a method for producing a recorded matter capable of producing a recorded matter having excellent color developability. The aqueous inkjet composition of the present invention includes a dye composed of at least one of a sublimation dye and a dispersion dye, a polyester, and water, wherein the content of the polyester is 4 times or more and 300 times or less of the content of the dye. The content of the polyester is more preferably 5% by mass or more and 30% by mass. The content of the dye is more preferably 0.1 mass% or more and 7.5 mass% or less.)

1. An aqueous inkjet composition comprising:

dye, which is composed of at least one of sublimation dye and disperse dye;

a polyester; and

the amount of water is controlled by the amount of water,

the content of the polyester is 4 times or more and 300 times or less of the content of the dye.

2. The aqueous inkjet composition according to claim 1, wherein,

the content of the polyester is 5 to 30 mass%.

3. The aqueous inkjet composition according to claim 1 or 2, wherein,

the content of the dye is 0.1 to 7.5 mass%.

4. The aqueous inkjet composition according to claim 3, wherein,

the content of the dye is 0.1 to 3 mass%.

5. The aqueous inkjet composition according to any one of claims 1 to 4, wherein,

comprising the polyester in the form of particles,

the polyester has an average particle diameter of 20nm to 300 nm.

6. The aqueous inkjet composition according to any one of claims 1 to 5, wherein,

the dye is one or more selected from the group consisting of c.i. disperse yellow 54, c.i. disperse red 60, c.i. disperse blue 360, c.i. disperse blue 359, c.i. disperse orange 25 and c.i. disperse orange 60.

7. A method for producing a recorded matter, comprising:

an application step of applying the aqueous inkjet composition according to any one of claims 1 to 6 to a recording medium by ejecting the composition by an inkjet method; and

a heating step of heating the recording medium to which the aqueous inkjet composition is applied.

8. The method for producing a recorded matter according to claim 7,

the recording medium is a fabric.

9. The method for producing a recorded matter according to claim 7 or 8,

the recording medium is a substance composed of one or more materials selected from the group consisting of silk, wool, cellulose, acrylic fiber, polyurethane, and polyamide.

10. The method for producing a recorded matter according to claim 7 or 8,

the recording medium is a substance composed of a polyester and one or more than two materials selected from the group consisting of cotton, silk, polyamide, acrylic fiber and polyurethane.

11. The method for producing a recorded matter according to any one of claims 7 to 10,

the heating temperature of the recording medium in the heating step is 100 ℃ to 160 ℃.

Technical Field

The present invention relates to an aqueous inkjet composition and a method for producing a recorded matter.

Background

In recent years, the use of ink jet printing has been expanding, and the ink jet printing is also suitable for commercial printing, textile printing, and the like, in addition to printers for offices and homes.

Inkjet inks containing sublimation dyes and disperse dyes having sublimation properties have also been used.

As such an ink for inkjet, there is a direct printing method in which a dye is impregnated by heat treatment such as steam after applying the ink to a recording medium to be dyed, or a thermal transfer printing method in which a dye is applied to an intermediate transfer medium and then sublimation-transferred from the intermediate transfer medium side to the recording medium to be dyed by heat (for example, see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 10-58638.

Disclosure of Invention

Problems to be solved by the invention

However, in order to obtain a good color development, the surface of the recording medium must be made of polyester, and there are limits to the types of recording media that can be used. By increasing the temperature of the heat treatment, the color developability of the sublimation dye or the dispersion dye is improved, but depending on the recording medium, undesirable color change may occur due to melting of the recording medium itself, zooming, or the like.

Means for solving the problems

The present invention has been made to solve the above problems, and can be realized as the following application examples.

An aqueous inkjet composition according to an application example of the present invention includes: dye, which is composed of at least one of sublimation dye and disperse dye;

a polyester; and

the amount of water is controlled by the amount of water,

the content of the polyester is 4 times or more and 300 times or less of the content of the dye.

In the aqueous inkjet composition according to another application example of the present invention, the content of the polyester is 5% by mass or more and 30% by mass or less.

In the aqueous inkjet composition according to another application example of the present invention, the content of the dye is 0.1 mass% or more and 7.5 mass% or less.

In the aqueous inkjet composition according to another application example of the present invention, the content of the dye is 0.1% by mass or more and 3% by mass or less.

In addition, in the aqueous inkjet composition according to another application example of the present invention, the aqueous inkjet composition contains the polyester in a particle form,

the polyester has an average particle diameter of 20nm to 300 nm.

In the aqueous inkjet composition according to another preferred embodiment of the present invention, the dye is one or more selected from the group consisting of c.i. disperse yellow 54, c.i. disperse red 60, c.i. disperse blue 360, c.i. disperse blue 359, c.i. disperse orange 25 and c.i. disperse orange 60.

A method for producing a recorded matter according to an application example of the present invention includes: an application step of applying the aqueous inkjet composition of the present invention to a recording medium by ejecting the composition by an inkjet method; and

a heating step of heating the recording medium to which the aqueous inkjet composition is applied.

In the method for producing a recorded matter according to another application example of the present invention, the recording medium is a fabric.

In the method for producing a recorded matter according to another preferred embodiment of the present invention, the recording medium is made of a material containing one or more materials selected from the group consisting of silk, wool, cellulose, acrylic fiber, polyurethane, and polyamide.

In the method for producing a recorded matter according to another preferred embodiment of the present invention, the recording medium is a medium containing polyester and one or two or more materials selected from the group consisting of cotton, silk, polyamide, acrylic fiber, and polyurethane.

In the method for producing a recorded matter according to another application example of the present invention, the heating temperature of the recording medium in the heating step is 100 ℃ or higher and 160 ℃ or lower.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail.

Aqueous inkjet composition

The aqueous inkjet composition of the present invention comprises: dye composed of at least one of sublimation dye and dispersion dye, polyester, and water. The content of the polyester in the aqueous inkjet composition is 4 times or more and 300 times or less the content of the dye.

By satisfying such conditions, an aqueous inkjet composition that can exhibit excellent color developability for various recording media can be provided. In particular, since excellent color developability is exhibited even when the recording medium is subjected to heat treatment at a relatively low temperature for a relatively short period of time, the ink composition can be suitably applied to a recording medium having low heat resistance, for example, a recording medium made of a material that melts during heat treatment at a relatively low temperature or a material that causes undesirable color change, and the range of recording medium selection is widened. Further, since excellent color developability can be exhibited even when the recording medium is subjected to heat treatment at a relatively low temperature for a relatively short period of time, it is also advantageous from the viewpoint of energy saving and improvement in the productivity of recorded matter. In addition, as described above, by making the ratio of the content of the polyester to the content of the dye high, even when a recorded matter produced using the aqueous ink jet composition is used for a heat treatment such as washing and cleaning with warm water, heat drying with a dryer, ironing, or the like, it is possible to effectively prevent the undesirable dye from being emitted to the outside of the recorded matter. The aqueous ink jet composition of the present invention can be applied to a method for producing a recorded matter without a transfer step as described in detail later, and is preferable from the viewpoints of improvement in productivity of recorded matter, reduction in production cost of recorded matter, resource saving, and the like.

The reason why such excellent effects can be obtained is considered to be as follows. That is, sublimation dyes and disperse dyes have a property of sublimating or diffusing by heating, while polyesters have an ester bond in the main chain, and a part of the ester bond is decomposed by heating to be decomposed into a carboxyl group and a hydroxyl group, and the carboxyl group and the hydroxyl group are re-bonded by cooling. Therefore, it is considered that the sublimation dye and the dispersion dye are brought into a monomolecular state by heating in a state where at least one of the sublimation dye and the dispersion dye is present in proximity to the polyester, and then the sublimation dye and the dispersion dye are brought into a monomolecular state by sublimation or diffusion, and thereafter the monomolecular state of the sublimation dye and the dispersion dye is held in the polyester by cooling, thereby exhibiting excellent color developability. In addition, compared to sublimation transfer printing in the related art, sublimation dyes and dispersion dyes can be brought into a monomolecular state even when the distance of movement of the sublimation dyes and dispersion dyes is short, and therefore, excellent color developability can be sufficiently ensured even in a heating treatment at a relatively low temperature for a relatively short time.

Further, the sublimation dye and the dispersion dye exhibit more excellent color development property in a monomolecular state, and in a state where a plurality of molecules are aggregated, even if the content thereof is large, the color development property is extremely inferior to that in the monomolecular state.

In the present invention, it was found that the ratio of the dye to the polyester is very important in order to efficiently bring the sublimation dye and the disperse dye into a monomolecular state, and the present invention was completed.

In contrast, satisfactory results cannot be obtained when the conditions are not satisfied.

For example, when the aqueous inkjet composition does not contain a polyester, it is difficult to sufficiently increase the ratio of the sublimation dye and the disperse dye in a monomolecular state to a recording medium other than the recording medium having a polyester surface, and satisfactory color developability cannot be exhibited.

Even when the aqueous inkjet composition contains a polyester, when the ratio of the content of the polyester to the content of the dye in the aqueous inkjet composition is less than the lower limit, it is difficult to sufficiently increase the ratio of the sublimation dye and the disperse dye in a monomolecular state to a recording medium other than a recording medium having a polyester on the surface, and satisfactory color developability cannot be exhibited.

Even when the aqueous inkjet composition contains a polyester, if the ratio of the content of the polyester to the content of the dye in the aqueous inkjet composition exceeds the upper limit value, the content of the dye itself decreases, and it is difficult to sufficiently increase the optical density of the dyed portion.

The above-described excellent effects cannot be obtained only by adding polyester to the sublimation transfer ink used in the prior art. That is, a general sublimation transfer ink generally contains a dye in a high content of 3 to 5 mass%, and in such an ink, the inclusion of a polyester in a high content deviates from the general knowledge, and a polyester containing 4 times or more and 300 times or less of the dye content is not easily conceivable by those skilled in the art as in the present invention.

In the present specification, the term "aqueous ink jet composition" refers to a concept including a raw liquid for preparing an ink, in addition to the ink itself discharged by an ink jet method. In other words, the aqueous ink jet composition of the present invention may be used for discharging by an ink jet method as it is, or may be used for discharging by an ink jet method after a treatment such as dilution. In the present specification, the aqueous ink jet composition means a composition containing at least water as a main volatile liquid component, and the proportion of water in the volatile liquid component constituting the aqueous ink jet composition is preferably 40 mass% or more, more preferably 50 mass% or more, and still more preferably 70 mass% or more.

As described above, in the aqueous inkjet composition, the content of the polyester may be 4 times or more and 300 times or less the content of the dye, and the lower limit of the content of the polyester is more preferably 8 times, more preferably 10 times, and still more preferably 20 times the content of the dye. The upper limit of the content of the polyester is more preferably 300 times, more preferably 200 times, and still more preferably 100 times the content of the dye.

This can more significantly exhibit the aforementioned effects.

Specific dyes

The aqueous inkjet composition of the present invention contains a dye composed of at least one of a sublimation dye and a dispersion dye. In the following description, the dye is also referred to as a "specific dye".

The specific dye generally exhibits excellent color development property with respect to polyester, but is inferior to other recording media, for example, recording media made of wool, cellulose, cotton, silk, polyester, polyamide, acrylic fiber, polyurethane, and the like.

The yellow sublimation dye and the disperse dye are not particularly limited, and examples thereof include c.i. disperse yellow 1, 3, 4, 5, 7, 9, 13, 23, 24, 30, 33, 34, 42, 44, 49, 50, 51, 54, 56, 58, 60, 61, 63, 64, 66, 68, 71, 74, 76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100, 104, 108, 114, 116, 118, 119, 122, 124, 126, 135, 140, 141, 149, 154, 160, 162, 163, 164, 165, 179, 180, 182, 183, 192, 198, 184, 201, 202, 204, 210, 211, 215, 216, 218, 224, 227, 231, 232, and the like.

The orange sublimation dye and the disperse dye are not particularly limited, and examples thereof include c.i. disperse orange 1, 3, 5, 7, 11, 13, 17, 20, 21, 25, 29, 30, 31, 32, 33, 37, 38, 42, 43, 44, 45, 46, 47, 48, 49, 50, 53, 54, 55, 56, 57, 58, 59, 60, 61, 66, 71, 73, 76, 78, 80, 89, 90, 91, 93, 96, 97, 119, 127, 130, 139, and 142.

Examples of the red sublimation dye and the disperse dye include, but are not particularly limited to, c.i. disperse red 1, 4, 5, 7, 11, 12, 13, 15, 17, 27, 43, 44, 50, 52, 53, 54, 55, 56, 58, 59, 60, 65, 72, 73, 74, 75, 76, 78, 81, 82, 86, 88, 90, 91, 92, 93, 96, 103, 105, 106, 107, 108, 110, 111, 113, 117, 118, 121, 122, 126, 127, 128, 131, 132, 134, 135, 137, 143, 145, 146, 151, 152, 153, 154, 157, 159, 164, 167, 169, 177, 181, 183, 184, 185, 188, 189, 190, 191, 192, 200, 201, 202, 203, 205, 206, 207, 210, 221, 224, 225, 227, 229, 239, 240, 257, 258, 278, 281, 277, 311, 324, 310, and the like.

Examples of the violet sublimation dye and the disperse dye include, but are not particularly limited to, c.i. disperse violet 1, 4, 8, 23, 26, 27, 28, 31, 33, 35, 36, 38, 40, 43, 46, 48, 50, 51, 52, 56, 57, 59, 61, 63, 69, and 77.

The sublimation dye and the disperse dye for green are not particularly limited, and examples thereof include c.i. disperse green 9.

The brown sublimation dye and the disperse dye are not particularly limited, and examples thereof include c.i. disperse brown 1,2, 4, 9, 13, and 19.

Examples of the blue sublimation dye and the disperse dye include, but are not particularly limited to, c.i. disperse blue 3, 7, 9, 14, 16, 19, 20, 24, 26, 27, 35, 43, 44, 54, 55, 56, 58, 60, 62, 64, 71, 72, 73, 75, 79, 81, 82, 83, 87, 91, 92, 93, 94, 95, 96, 102, 106, 108, 112, 113, 115, 118, 120, 122, 125, 128, 130, 139, 141, 142, 143, 146, 148, 149, 153, 154, 158, 165, 167, 171, 173, 174, 176, 181, 183, 185, 187, 186, 189, 197, 198, 200, 201, 205, 207, 211, 214, 224, 225, 257, 259, 267, 268, 270, 284, 285, 287, 288, 291, 293, 295, 297, 301, 315, 330, 333, 359, and the like.

The sublimation dye and the disperse dye of black are not particularly limited, and examples thereof include c.i. disperse black 1, 3, 10, and 24.

The specific dye may be one of the sublimation dyes and the dispersion dyes, or two or more of them may be used in combination.

Among them, the specific dye is more preferably one or more selected from the group consisting of c.i. disperse yellow 54, c.i. disperse red 60, c.i. disperse blue 360, c.i. disperse blue 359, c.i. disperse orange 25 and c.i. disperse orange 60.

This can improve the color developability of the dyed portion of the recorded matter. Further, the color developability can be sufficiently ensured even by a heating treatment at a lower temperature and for a shorter time.

The lower limit of the content of the specific dye in the aqueous inkjet composition is preferably 0.1% by mass, more preferably 0.15% by mass, and still more preferably 0.2% by mass. The upper limit of the content of the specific dye in the aqueous inkjet composition is preferably 7.5% by mass, more preferably 3% by mass, and still more preferably 2.4% by mass.

Thus, the specific dye can be more appropriately brought into a monomolecular state in the dyed portion, and the optical density can be further increased.

Polyester

The aqueous inkjet composition of the present invention comprises a polyester.

Polyesters can generally be dyed more suitably by the specific dyes mentioned above.

The polyester constituting the aqueous inkjet composition of the present invention may be a modified polyester as long as it is a polymer material having an ester bond in the main chain.

Examples of commercially available polyesters that can be used for the preparation of the aqueous ink jet composition of the present invention include Polyester available from japan synthetic chemical company, Plascoat available from the chemical industry, Aronmelt available from east asian synthetic company, Elitel available from Unitika, Pesresin available from kokusu oil & fat company, Super Flex available from first industrial pharmaceutical company, Vylonal available from eastern japan, and Nippolan available from Polyester polyol available from eastern cao company. When a commercially available polyester aqueous dispersion is used, the content of the polyester as a solid content is adjusted so as to satisfy the above-described relationship.

The lower limit of the acid value of the polyester constituting the aqueous inkjet composition of the present invention is preferably 1.0KOHmg/g, more preferably 1.5KOHmg/g, and still more preferably 2.0 KOHmg/g. The upper limit of the acid value of the polyester constituting the aqueous inkjet composition of the present invention is preferably 15KOHmg/g, more preferably 10KOHmg/g, and still more preferably 5.0 KOHmg/g.

This makes it possible to further improve the color developability of the specific dye in various recording media.

The lower limit of the hydroxyl value of the polyester constituting the aqueous inkjet composition of the present invention is preferably 1.0KOHmg/g, more preferably 2.0KOHmg/g, and still more preferably 3.0 KOHmg/g. The upper limit of the hydroxyl value of the polyester constituting the aqueous inkjet composition of the present invention is preferably 20KOHmg/g, more preferably 15KOHmg/g, and still more preferably 10 KOHmg/g.

This makes it possible to further improve the color developability of the specific dye in various recording media.

The lower limit of the number average molecular weight of the polyester constituting the aqueous inkjet composition of the present invention is preferably 3000, more preferably 6000, and still more preferably 10000. The upper limit of the number average molecular weight of the polyester constituting the aqueous inkjet composition of the present invention is preferably 25000, more preferably 20000, and still more preferably 18000.

This makes it possible to further improve the color developability of the specific dye in various recording media.

In the aqueous inkjet composition, the polyester may be in any form. For example, in the aqueous inkjet composition, the polyester may be contained in a dissolved state, or may be contained in a dispersed state including a colloidal state, an emulsified state, and the like. The polyester may be included in a gelled state. In addition, in the aqueous inkjet composition, the polyester may cover at least a part of the surface of the specific dye. In addition, these states may exist in a mixture.

When the aqueous inkjet composition is a substance containing a polyester in a particulate form, the lower limit of the average particle diameter of the polyester is preferably 20nm, more preferably 40nm, and still more preferably 60 nm. The upper limit of the average particle diameter of the polyester is more preferably 300nm, still more preferably 250nm, and still more preferably 200 nm.

This makes it possible to easily prepare the aqueous inkjet composition and to further improve the dispersion stability of the polyester in the aqueous inkjet composition, the storage stability of the aqueous inkjet composition, and the ejection stability of the aqueous inkjet composition by an inkjet method. In addition, the adsorption of the specific dye in a monomolecular state after the aqueous inkjet composition is attached to the recording medium can be more suitably performed, and the color developability of the specific dye can be more excellent.

It should be noted that, in the present specification, the average particle diameter refers to a volume-based average particle diameter unless otherwise specified. The average particle diameter can be determined by measurement using, for example, MICROTRAC UPA (manufactured by japan).

The lower limit of the content of the polyester in the aqueous inkjet composition is preferably 2% by mass, more preferably 5% by mass, and still more preferably 10% by mass. The upper limit of the content of the polyester in the aqueous inkjet composition is preferably 40% by mass, more preferably 30% by mass, and still more preferably 20% by mass.

This makes it possible to further improve the storage stability of the aqueous inkjet composition and the ejection stability of the aqueous inkjet composition by the inkjet method. Further, the color developability of the specific dye and the optical density of the dyed portion can be further improved.

Water (W)

The aqueous inkjet composition comprises water. As the water, for example, pure water such as RO (reverse osmosis) water, distilled water, ion-exchanged water, and the like can be used.

The lower limit of the water content in the aqueous inkjet composition is not particularly limited, but is preferably 30% by mass, more preferably 35% by mass, and still more preferably 40% by mass. The upper limit of the water content in the aqueous inkjet composition is not particularly limited, but is preferably 85 mass%, more preferably 80 mass%, and still more preferably 75 mass%.

This makes it possible to more reliably adjust the viscosity of the aqueous inkjet composition to a more preferable value, and further improve the ejection stability by the inkjet method.

Solvents other than water

The aqueous inkjet composition may contain a solvent other than water.

This makes it possible to suitably adjust the viscosity of the aqueous ink jet composition and to improve the moisture retention of the aqueous ink jet composition. As a result, droplet discharge by the ink jet method can be performed more stably.

Examples of the solvent other than water contained in the aqueous inkjet composition include glycerin, 1, 2-propanediol, and 2-pyrrolidone.

By including these solvents, the evaporation rate is slowed by the excellent moisture retention ability, and the droplet discharge can be performed more stably.

The lower limit of the content of the solvent other than water contained in the aqueous inkjet composition is not particularly limited, but is preferably 0% by mass, more preferably 3% by mass, and still more preferably 5% by mass. The upper limit of the content of the solvent other than water contained in the aqueous inkjet composition is not particularly limited, but is preferably 30% by mass, more preferably 25% by mass, and still more preferably 20% by mass.

This can more significantly exhibit the effect of the solvent containing water other than the above-described water.

Surface active agent

The aqueous inkjet composition may include a surfactant.

This makes it possible to make the wettability of the aqueous ink jet composition with respect to the recording medium more suitable, which is advantageous for obtaining better image quality.

As the surfactant contained in the aqueous inkjet composition, various surfactants such as an anionic surfactant, a cationic surfactant, and a nonionic surfactant can be used.

More specifically, examples of the surfactant contained in the aqueous inkjet composition include acetylene-based surfactants, silicone-based surfactants, and fluorine-based surfactants.

Other ingredients

The aqueous inkjet composition may contain components other than the aforementioned components. Hereinafter, such components are also referred to as other components.

Examples of the other components include colorants other than specific dyes, various dispersants, emulsifiers, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, diethylene glycol monomethyl ether, 1, 2-hexanediol, 1, 2-pentanediol, 1, 2-butanediol, 3-methyl-1, 5-pentanediol and other penetrating agents, triethanolamine and other drying inhibitors, pH adjusters, ethylenediaminetetraacetate and other chelating agents, preservatives, mildewcides, and rust inhibitors. As the preservative and antifungal agent, for example, a compound having an isothiazolinone ring structure in the molecule can be suitably used.

The content of the other components is preferably 6% by mass or less, and more preferably 5% by mass or less. When a plurality of components are contained as other components, the sum of the contents preferably satisfies the above-described conditions.

The lower limit of the surface tension at 25 ℃ of the aqueous inkjet composition is not particularly limited, and is preferably 20mN/m, more preferably 21mN/m, and still more preferably 23 mN/m. The upper limit of the surface tension at 25 ℃ of the aqueous inkjet composition is not particularly limited, but is preferably 50mN/m, more preferably 40mN/m, and still more preferably 30 mN/m.

This makes it more difficult to cause clogging of the nozzles of the ink jet type discharge device, and the discharge stability of the aqueous ink jet composition is further improved. In addition, even when the nozzle is clogged, the nozzle can be capped, that is, the restorability by capping can be further improved.

As the surface tension, a value measured by Wilhelmy (Wilhelmy) method can be used. For the measurement of the surface tension, for example, a surface tension meter such as CBVP-7 manufactured by Kyowa interface science, Inc. can be used.

The lower limit of the viscosity at 25 ℃ of the aqueous inkjet composition is not particularly limited, but is preferably 2 mPas, more preferably 3 mPas, and still more preferably 4 mPas. The upper limit of the viscosity at 25 ℃ of the aqueous inkjet composition is not particularly limited, but is preferably 30 mPas, more preferably 20 mPas, and still more preferably 10 mPas.

This improves the ejection stability of the aqueous inkjet composition.

The viscosity can be controlled at 25 ℃ by using a viscoelastic tester such as MCR-300 manufactured by Pysica, for example, so that the Shear Rate (Shear Rate) can be controlled from 10 s^-1]Raise to 1000 s^-1]And the viscosity at a shear rate of 200 was read.

When the aqueous ink jet composition of the present invention is an ink, the ink is usually contained in a container such as a cartridge, a bag, or a tank and is applied to a recording apparatus using an ink jet method. In other words, the recording apparatus according to the present invention is an apparatus including a container such as an ink cartridge that contains the ink as the aqueous inkjet composition of the present invention.

Method for producing recorded matter

The method for producing a recorded matter of the present invention comprises: an application step of applying the aqueous inkjet composition according to the present invention to a recording medium by ejecting the composition by an inkjet method; and a heating step of heating the recording medium to which the aqueous inkjet composition is applied.

This enables production of a recorded matter having excellent color developability. In particular, excellent color developability can be exhibited for various recording media.

Providing step

In the applying step, the aqueous inkjet composition is ejected by an inkjet method and applied to a recording medium. The ejection of the aqueous inkjet composition by the inkjet system can be performed using a known inkjet recording apparatus. As the ejection method, a piezoelectric method, a method of ejecting ink by generating bubbles by heating ink, or the like can be used. Among them, the piezoelectric system is more preferable from the viewpoint of the difficulty in changing the quality of the aqueous inkjet composition.

In the application step, a plurality of aqueous inkjet compositions according to the present invention may be used in combination. More specifically, for example, a plurality of aqueous inkjet compositions having different compositions of specific dyes may be used in combination.

In addition, inks other than the aqueous inkjet composition according to the present invention may be used in combination in the applying step.

Recording medium

The material constituting the recording medium is not particularly limited, and examples thereof include resin materials such as polyurethane, polyethylene, polypropylene, polyester, polyamide, and acrylic resin, paper, glass, metal, ceramic, leather, wood, pottery, fibers made of at least one of these, various natural fibers such as silk, wool, cotton, hemp, polyester, polyamide (nylon), acrylic fiber, polyurethane, cellulose, cotton linter, rayon, cuprammonium fiber, and cellulose acetate, synthetic fibers, and semisynthetic fibers, and one or two or more selected from these can be used in combination. As the recording medium, a material having a three-dimensional shape such as a sheet, a sphere, or a rectangular parallelepiped can be used.

In particular, the recording medium is preferably a fabric.

Dyeing of fabric is required for printing T-shirts and the like, and printing by ironing and the like is widespread, and on the other hand, dyeing of fabric other than polyester fiber fabric is strongly required. Therefore, when the recording medium is a fabric, the effects of the present invention can be more remarkably exhibited.

The recording medium is preferably made of a material containing one or more kinds selected from the group consisting of silk, wool, cellulose, acrylic fiber, polyurethane, and polyamide.

These materials are strongly required for dyeing, and on the other hand, they are not suitable for dyeing using sublimation dyes or disperse dyes in the prior art because of the relationship with heat resistance temperature or the like. In contrast, in the present invention, even when a recording medium made of these materials is used, a recorded matter can be produced more suitably. Therefore, when the recording medium is made of a material containing one or two or more selected from the group consisting of silk, wool, cellulose, acrylic fiber, polyurethane, and polyamide, the effect of the present invention can be more remarkably exhibited.

Among fibers used for the fabric, there are hemp and wool (e.g., wool) which are prone to fuzzing. Since the ink jet head is in contact with the wool, the hemp and wool which are prone to raising easily cause nozzle omission, and even if the nozzle omission can be avoided, the fabric has many fine holes or irregularities, and therefore the ink is less likely to land, and is not said to be suitable for ink jet printing. Cotton, silk, polyester, polyamide, acrylic and polyurethane, which are difficult to fuzz, are suitable for ink-jet printing.

Therefore, the recording medium is preferably one composed of one or more materials selected from the group consisting of cotton, silk, polyester, polyamide, acrylic fiber, and polyurethane.

In addition, in the case where the recording medium is a blend with polyester, that is, in the case where the recording medium is a material including polyester and one or two or more selected from the group consisting of cotton, silk, polyamide, acrylic fiber, and polyurethane, in dyeing using conventional sublimation dyes and disperse dyes, another fiber other than polyester cannot be dyed, that is, uneven dyeing is likely to occur, but in the present invention, even if the blend is also dyed sufficiently, the effect according to the present invention can be more remarkably exhibited.

In addition, even with polyester, the present invention has good color development efficiency, and therefore, the present invention can exhibit effects more than the dyeing using sublimation dyes and dispersion dyes of the prior art.

Further, in the case of using a member made of a dense resin material such as paper, glass, ceramic, metal, wood, or a resin film as a recording medium in the prior art, particularly in the case of using glass as a recording medium, it is difficult to sufficiently improve the color developability of the dyed portion and the adhesion between the recording medium and the dyed portion. That is, when a member made of a dense resin material such as paper, glass, ceramic, metal, wood, or a resin film is used as the recording medium, the effect of the present invention can be more remarkably exhibited.

Heating step

Thereafter, the recording medium to which the aqueous inkjet composition is applied is heated. Thus, the specific dye is fixed to the recording medium together with the polyester or the like, and the specific dye appropriately develops color, whereby a recorded matter can be obtained.

The lower limit of the heating temperature in this step is not particularly limited, but is preferably 100 ℃, more preferably 105 ℃, and still more preferably 110 ℃. The upper limit of the heating temperature in the present step is not particularly limited, but is preferably 180 ℃, more preferably 160 ℃, and still more preferably 150 ℃.

This can reduce the energy required for producing the recorded matter, and can improve the productivity of the recorded matter. Further, the color developability of the obtained recorded matter can be further improved. In addition, the present invention can be suitably applied to a recording medium having low heat resistance, and the range of selection of the recording medium is further widened. In addition, undesirable discoloration, changes in optical density, and the like due to heating after the production of the recorded matter, for example, washing and cleaning with warm water, heat drying with a dryer, heat treatment such as ironing, and the like can be suitably prevented.

When a recording medium having high heat resistance, for example, paper, glass, ceramic, metal, wood or the like is used, the upper limit of the heating temperature in this step is preferably 250 ℃, more preferably 220 ℃, and still more preferably 200 ℃.

The heating time in this step varies depending on the heating temperature, but the lower limit of the heating time in this step is preferably 0.2 seconds, more preferably 1 second, and still more preferably 5 seconds. The upper limit of the heating time in this step is preferably 300 seconds, more preferably 60 seconds, and still more preferably 30 seconds.

This can reduce the energy required for producing the recorded matter, and can improve the productivity of the recorded matter. Further, the color developability of the obtained recorded matter can be further improved. In addition, the present invention can be suitably applied to a recording medium having low heat resistance, and the range of selection of the recording medium is further widened.

The step may be performed by heating the recording medium to which the aqueous inkjet composition is attached in a state where the surface of the recording medium is separated from the heating member, or may be performed by heating the recording medium to which the aqueous inkjet composition is attached in a state where the recording medium and the heating member are in close contact with each other.

This can reduce the energy required for producing the recorded matter, and can improve the productivity of the recorded matter. Further, the color developability of the obtained recorded matter can be further improved. In addition, the specific dye can be more effectively prevented from being emitted to the outside of the recording medium.

While the preferred embodiments of the present invention have been described above, the present invention is not limited thereto.

For example, the aqueous inkjet composition of the present invention may be any composition used for inkjet ejection, and may not be any composition suitable for the above-described method.

For example, the method may be applied to a method including a step other than the above-described steps.

In this case, as the pretreatment step, for example, a step of applying a coating layer to the recording medium may be mentioned.

The intermediate treatment step may be, for example, a step of preheating the recording medium. Examples of the post-treatment step include a step of cleaning the recording medium.

The aqueous inkjet composition of the present invention can be suitably used in a method for producing a recording medium having a transfer step. In other words, the present invention can also be applied to a method of sublimation transfer of a specific dye to a recording medium to be dyed by heating after applying the aqueous inkjet composition to the intermediate transfer medium.

Examples

Next, specific examples of the present invention will be described.

[1] Formulation of inkjet inks

Example 1

First, c.i. disperse yellow 54 as a specific dye, MD-1480 (manufactured by toyobo co., ltd.), glycerin, triethylene glycol monobutyl ether, triethanolamine, Olfine E1010 (manufactured by riken chemical industries, inc.) as a surfactant, and pure water were mixed at a predetermined ratio, and stirred at 3000rpm in a High speed stirrer (manufactured by Silverson corporation) to form a slurry. Then, the slurry and glass spheres having a diameter of 0.5mm were stirred and dispersed in a ball mill (LMZ015Ashizawa Finetech) in a cold water bath to produce an inkjet ink as an aqueous inkjet composition.

The average particle size of c.i. disperse yellow 54 in the inkjet ink was 150 nm. The polyester contained in MD-1480 has an acid value of 3KOHmg/g, a hydroxyl value of 6KOHmg/g, and a number-average molecular weight of 15X 10³。

Examples 2 to 12

Inkjet inks were produced in the same manner as in example 1, except that the type of the specific dye and the compounding ratio of each component were adjusted to have the compositions shown in table 1.

Comparative examples 1 to 7

Inkjet inks were produced in the same manner as in example 1, except that the type of the specific dye and the compounding ratio of each component were adjusted to have the compositions shown in table 2.

The compositions of the inkjet inks of the examples and comparative examples are summarized in tables 1 and 2. In the table, "%" means "% by mass", c.i. disperse yellow 54 is indicated as "DY 54", c.i. disperse red 60 is indicated as "DR 60", c.i. disperse blue 360 is indicated as "DB 360", c.i. disperse blue 359 is indicated as "DB 359", c.i. disperse orange 25 is indicated as "DO 25", c.i. disperse orange 60 is indicated as "DO 60", polyester is indicated as "PEs", glycerin is indicated as "Gly", triethylene glycol monobutyl ether is indicated as "TEGBE", triethanolamine is indicated as "TEA", and Olfine E1010 (manufactured by japanese patent chemical industries, inc.) is indicated as "E1010". The surface tension of the inkjet inks of the respective examples was a value in the range of 25mN/m to 35 mN/m. The surface tension was measured by the Williams method at 25 ℃ using a surface tensiometer (CBVP-7, manufactured by Kyowa interface science Co., Ltd.). In addition, the average particle diameter of the polyester in the inkjet ink of each of the above examples was a value in the range of 20nm to 300 nm. In the table, the column of the polyester content shows the content of the polyester as a solid content, and the content of water contained in the polyester aqueous dispersion used for preparation was removed.

[2] Evaluation of

[2-1] viscosity

The viscosity of each of the inkjet inks of the examples and comparative examples was determined and evaluated according to the following criteria. The viscosity was measured by using a viscoelastometer MCR-300 (manufactured by Pysica) at 25 ℃ and a shear rate of 10 s^-1]Raise to 1000 s^-1]Read viscosity at a shear rate of 200. The good grade is C or above.

A: the viscosity is 2.0 mPas or more and less than 5.0 mPas.

B: the viscosity is 5.0 mPas or more and less than 10 mPas.

C: the viscosity is 10 mPas or more and less than 20 mPas.

D: the viscosity is 20 mPas or more and less than 30 mPas.

E: the viscosity is 30 mPas or more.

[2-2] color development Properties

The inkjet inks of the examples and comparative examples were each discharged in a predetermined pattern onto a cotton fabric as a recording medium using a recording apparatus PX-M860F (manufactured by seiko Epson).

Then, an iron as a heating member was brought into contact with the side of the recording medium to which the inkjet ink was applied, and heat treatment was applied at 150 ° c. × 20 seconds to obtain a recorded matter.

The color development of each of the obtained recorded matters was evaluated. Specifically, the site to which the inkjet ink was applied on the recording medium after the inkjet ink was applied and before the heat treatment was applied in the production process of each of the above-mentioned recorded matters and the corresponding site on each of the recorded matters obtained by the above-mentioned operations were measured for chromaticity using i1 (manufactured by X-rite corporation), and the OD value of the site to which the inkjet ink was applied on each of the recorded matters was determined while the rate of increase in color saturation (√ a ^ 2+ b ^ 2)) before and after the heat treatment was determined at the time of color measurement in the L α a b color space, and the evaluation was performed according to the following criteria. The higher the increase rate of color saturation or the higher the OD value, the more excellent the color developability can be said to be. The good grade is C or above.

A: the degree of increase in color saturation is 50% or more, and the OD value is 0.5 or more.

B: the increase rate of color saturation is 30% or more and less than 50%, and the OD value is 0.5 or more.

C: the increase rate of color saturation is 15% or more and less than 30%, and the OD value is 0.5 or more.

D: the increase rate of color saturation is 0% or more and less than 15%, and the OD value is 0.5 or more.

E: the color saturation was reduced compared to before the heat treatment, and the OD value was less than 0.5.

Color developability was evaluated in the same manner as described above except that the recording medium was changed to a polyester fiber fabric, a polyester fiber and cotton fiber blended fabric, a silk fabric, a polyurethane fabric, an acrylic fiber fabric, and a polyamide fiber fabric.

[2-3] color development Using sublimation transfer method

The inkjet inks of the examples and comparative examples were each discharged in a predetermined pattern onto a transfer Classic (Cham Paper) as an intermediate transfer medium using a recording apparatus PX-M860F (manufactured by seiko Epson).

Next, the side of the intermediate transfer medium having the ink jet ink applied thereto was brought into close contact with a polyester fabric as a recording medium, and in this state, the medium was heated under conditions of 200 ℃.

The color development of each of the obtained recorded matters was evaluated. Specifically, the site of the intermediate transfer medium to which the inkjet ink was applied before the application of the heat treatment after the application of the inkjet ink in the production process of each of the above-mentioned recorded matters and the corresponding site of each of the recorded matters obtained by the above-mentioned operations were measured for chromaticity using i1 (manufactured by X-rite corporation), and the OD value of the site of each of the recorded matters to which the inkjet ink was applied was evaluated on the basis of the following criteria, while the rate of increase in the color saturation before and after the heat treatment in the color measurement in the L α θ b color space was determined. The higher the increase rate of color saturation or the higher the OD value, the more excellent the color developability can be said to be. The good grade is C or above.

A: the degree of increase in color saturation is 50% or more, and the OD value is 0.5 or more.

B: the increase rate of color saturation is 30% or more and less than 50%, and the OD value is 0.5 or more.

C: the increase rate of color saturation is 15% or more and less than 30%, and the OD value is 0.5 or more.

D: the increase rate of color saturation is 0% or more and less than 15%, and the OD value is 0.5 or more.

E: the color saturation was reduced as compared with that before the heat treatment, and in addition, the OD value was less than 0.5.

[2-4] fixability

The recorded matter of each example and each comparative example, which was produced using the cotton fabric of [2-2] as the recording medium, was washed with a washing detergent (top clear kit, manufactured by lion king company) in a standard mode of a household washing machine (TW-Z9500L, manufactured by toshiba Life style corporation) at a warm water of 40 ℃. The lower the reduction rate of the OD value, the better the fixability to the recording medium in the dyed portion with the inkjet ink. The good grade is C or above.

A: the decrease rate of the OD value was less than 3%.

B: the reduction rate of the OD value is 3% or more and less than 10%.

C: the reduction rate of the OD value is 10% or more and less than 30%.

D: the reduction rate of the OD value is 30% or more and less than 50%.

E: the reduction rate of the OD value is 50% or more.

These results are summarized in tables 3 and 4.

As is clear from tables 3 and 4, excellent results were obtained in the present invention. In contrast, in the comparative example, satisfactory results were not obtained.

In addition, the same results as described above can be obtained when the recorded matter is produced in the same manner as described above, except that paper made of cellulose fibers is used as the recording medium. In addition, the same results as described above can be obtained when the recorded matter is produced in the same manner as described above except that the heating temperature in the heating step is changed to a range of 100 ℃ to 160 ℃, and the heating time is changed to a range of 0.2 seconds to 300 seconds. Further, in the case of attempting to produce a recorded matter in the same manner as [2-2] except that a polyurethane fabric, an acrylic fiber fabric, and a polyamide fiber fabric were used as the recording medium, and the heating conditions for the recording medium to which the inkjet ink was applied were changed to 200 ℃x60 seconds or more, the recording medium was changed in length by heating the woolen fabric, and the polyamide fiber fabric was melted by heating, and thus the evaluation could not be made.

The ink-jet inks of the above examples each showed excellent color development in the production of recorded matter in the same manner as in [2-2] above except that paper, a glass plate, a stainless steel plate, a tile plate made of ceramic, a dense plate made of polycarbonate, and a plate made of wood, which were used as recording media, were changed to 200 ℃ in heat treatment temperature, and it was confirmed that the adhesion of the recording portion to the recording media was excellent.