WO2008026417A1

WO2008026417A1 - Displacement liquid for inkjet printer, inkjet image recording method, and inkjet printer

Info

Publication number: WO2008026417A1
Application number: PCT/JP2007/065157
Authority: WO
Inventors: Satoshi Masumi
Original assignee: Konica Minolta Medical & Graphic, Inc.
Priority date: 2006-09-01
Filing date: 2007-08-02
Publication date: 2008-03-06
Also published as: JPWO2008026417A1

Abstract

There is provided a displacement liquid for inkjet printers capable of preventing their inkjet head nozzles from clogging. An inkjet image recording method and an inkjet printer each using the displacement liquid are also provided. The displacement liquid is used in inkjet printers equipped with an ink supply path having an ink contact portion made of metal and contains a compound capable of forming a film on the metal.

Description

Specification

Replacement liquid for ink jet printer, ink jet image recording method, and ink jet printer

Technical field

The present invention relates to a replacement liquid for an ink jet printer, and more specifically, a replacement liquid for an ink jet printer applied to an ink jet printer having an ink supply path made of a metal material, an ink jet image recording method and an ink jet printer using the same. About. Background art

[0002] Inkjet recording methods have been applied to various printing fields such as photography, various printing, marking, special printing such as color filters, etc., from the viewpoint of simple and inexpensive image creation.

[0003] Inks used for the ink jet recording system are properly selected according to applications such as solvent-based ink-jet ink, oil-based ink-jet ink, solid-based ink jet ink, and curable ink-jet ink in addition to the commonly used water-based ink-jet ink. . In particular, curable ink-jet inks that are cured with active energy rays such as ultraviolet rays are attracting attention and are in great demand due to the variety of recording media that can be used.

[0004] Among them, it is known that a cationically polymerizable ink-jet ink has high safety and high sensitivity and is advantageously used by selecting a polymerizable compound and an initiator (see, for example, Patent Document 1). ).

[0005] On the other hand, an inkjet printer used in an inkjet recording method may easily cause clogging of the inkjet head. Filtered or degassed ink may be used, or a filter may be provided in the inkjet printer. In addition, regular maintenance of the inkjet head may be necessary to prevent clogging or to repair clogging.

[0006] In particular, when using an energy beam curable inkjet ink, since a polymerizable compound is used, it is necessary to take into consideration that clogging is not caused by sufficient light shielding!

[0007] However, an ink jet using a cationic energy ray-curable inkjet ink is used. Even when the shade was adequately shielded by an Etto printer, the clogging prevention property was insufficient.

[0008] Further, as a technique for preventing clogging, for example, when an ink jet printer is not performing an image recording operation, a technique of covering the discharge port with a cap, an ink jet printer performs an image recording operation. When the image recording operation is finished, or when trying to finish the image recording operation, the force S is known for wiping off ink adhering to the vicinity of the ejection port (see, for example, Patent Documents 2 to 4). It was not something.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-315778 (Claims)

Patent Document 2: JP-A-59-111856 (Claims)

Patent Document 3: JP-A-8-1953 (Claims)

Patent Document 4: Japanese Patent Publication No. 62-9030 (Claims)

Disclosure of the invention

Problems to be solved by the invention

An object of the present invention is to provide a replacement liquid for an ink jet printer that prevents nozzle clogging in an ink jet head, an ink jet image recording method and an ink jet printer using the same.

Means for solving the problem

[0010] The object of the present invention is achieved by the following configurations.

[0011] 1. A substitution liquid for an ink jet printer used in an ink jet printer having an ink supply path having an ink contact portion made of a metal, characterized in that it contains a compound having a film-forming ability for the metal. Replacement fluid for inkjet printers.

[0012] 2. The compound having film-forming ability is selected from nitrite, borate, molybdate, carbonate, phosphate, sulfonate, amines, triazoles, thiazoles and imidazoles. 2. The replacement liquid for an ink jet printer according to 1 above, which is at least one selected.

[0013] 3. The replacement liquid for an ink jet printer as described in 1 above, wherein the compound having the film-forming ability is a cation surfactant.

[0014] 4. By an ink jet printer having an ink supply path having an ink contact portion made of metal An ink jet image recording method for performing ink jet image recording, wherein the ink contact portion is subjected to the step of bringing the ink contact portion into contact with the replacement liquid for an ink jet printer according to any one of 1 to 3 above. An ink jet image recording method characterized by comprising:

[0015] 5. The ink jet image recording method described in 4, wherein the ink supply path force having the ink contact portion is an ink jet head.

[0016] 6. The step of bringing the ink jet printer replacement liquid into contact includes the step of filling the ink supply path with the ink jet printer replacement liquid, or the process of circulating the ink jet printer replacement liquid in the ink supply path. 6. The inkjet image recording method described in 4 or 5 above, wherein

[0017] 7. The step of discharging the ink jet printer replacement liquid from the ink supply path after the step of bringing the ink jet printer replacement liquid into contact with the ink jet printer.

4. The inkjet image recording method according to item 1, wherein any one of 4 to 6 is used.

[0018] 8. The inkjet image recording method according to any one of 4 to 7, which is an inkjet ink force S used in the inkjet printer, a cationic polymerization type active energy ray-curable ink.

[0019] 9. An inkjet printer characterized by being used in the inkjet image recording method described in any one of 4 to 8 above.

The invention's effect

[0020] With the above-described configuration of the present invention, it is possible to provide a replacement liquid for an inkjet printer that prevents the occurrence of nozzle clogging in the inkjet head, an inkjet image recording method, and an inkjet printer using the same.

Brief Description of Drawings

FIG. 1 is a schematic view showing an example of cleaning an ink jet head using a replacement liquid for an ink jet printer of the present invention.

Explanation of symbols 4 Replacement fluid inlet

5A to 5D liquid supply piping

6 Liquid feed pump

7 Substituent

8 Replacement fluid storage container

9 Filter (stainless steel): The filter holder is made of aluminum

A Circulation process

B Discharge process

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described in detail.

[0024] The present invention is a replacement liquid for an ink jet printer (hereinafter also simply referred to as a replacement liquid) applied to an ink jet printer provided with an ink supply path having an ink contact portion made of a metal, and the replacement liquid includes: It contains a compound having a film-forming ability for the metal

Yes

[0025] The substitution liquid of the present invention can prevent nozzle clogging in the ink jet head by containing a compound having a film forming ability with respect to the metal constituting the ink contact portion of the ink supply path.

[0026] (Inkjet printer)

The ink supply path of the ink jet printer according to the present invention refers to all the ink contacts from the portion where the ink jet ink (hereinafter also simply referred to as ink) of the ink jet printer is stored to the portion where the ink is ejected from the ink jet printer. This includes the ink storage section, the supply path from the ink storage section to the inkjet head, and the inkjet head.

The ink jet printer according to the present invention is characterized in that at least a part of the ink supply path has an ink contact portion made of a metal force. The ink contact part as used in the present invention is a part that contacts when passing through the ink supply path before being ejected from the ink-jet S inkjet head, and the part of which the surface is made of metal! / [0028] Examples of the metal member constituting the ink contact portion according to the present invention include iron, an alloy of iron and chromium (stainless steel), anodized aluminum, and the like.

[0029] (Substitution liquid)

The replacement liquid for an ink jet printer of the present invention is a liquid that can be used for an ink jet printer that performs ink jet image recording using an ink jet ink and can be replaced by an ink for performing image recording and an ink supply path.

The replacement liquid can be used as a cleaning liquid for cleaning the ink supply path performed before ink jet image recording, a filling liquid for filling the ink supply path with a liquid, or the like.

[0031] The compound having the ability to form a film on the metal constituting the ink contact part according to the present invention is a compound that can be adsorbed on the metal surface when the replacement liquid contacts the metal.

[0032] Examples of compounds having film-forming ability include nitrites such as sodium nitrite and potassium nitrite, nitrates such as sodium nitrate and potassium nitrate, borate salts such as sodium borate and potassium borate, ammonium molybdate, and molybdenum. Molybdates such as potassium silicate, carboxylates such as potassium oleate, sodium stearate, sodium alkyl ether carboxylate, phosphates such as sodium pyrophosphate, oxalates such as potassium silicate and sodium silicate , Sulphonate such as sodium benzene sulphonate, phosphonate such as sodium methylene phosphonate, amines such as monoethanolamine and triethanolamine, triazoles such as benzotriazole, mercaptobenzothiazole, Nzo Examples include thiazoles such as azolethioacetic acid, 2-benzothiazolethiopropionic acid, 2-benzothiazolepropionic acid, imidazoles such as benzimidazole, and anionic surfactants such as alkylbenzenesulfonic acid, and these are preferable. Used.

[0033] The compound having an adsorption-type film-forming ability is a type that forms an oxide film on the metal surface, a type that forms a film on the metal surface by combining with components in the liquid such as calcium ions, and a film together with metal ions. There is a precipitation film type that forms a film, and an adsorption film type in which molecules having a polar group and a hydrophobic group are adsorbed to a metal surface via polarity.

[0034] Examples of the compound adsorbed in the oxide film type include nitrite, nitrate, molybdate and the like. Examples of compounds adsorbed in the precipitation film type include phospho Phosphates, polymerized phosphates, zinc salts, borates, triazole compounds, imidazole compounds

And thiazole compounds. Examples of the adsorbing film type adsorbing compound include amines and anionic surfactants.

[0035] The concentration of the compound having a film-forming ability in the replacement liquid is not particularly limited as long as it is within the range of dissolution. From the viewpoint of prevention of clogging and ink ejection stability, 0.01% by mass to 25% mass

It is preferable to set in the range of%.

[0036] As the solvent used in the substitution liquid of the present invention, for example, water is preferable when used as a water-based ink as an ink. When the ink is organic solvent-based, aliphatic alcohols such as methanol, ethanol, and polypropylene V, and ketones such as dimethyl ketone and methyl ethyl ketone

Glycols, glycol ethers, glycol esters, aromatic hydrocarbons, aliphatic hydrocarbons, amides, amino alcohols, morpholine, pyridine, and other nitrogen-containing compounds.

[0037] Water and an organic solvent, some! /, May be used as a mixture of organic solvents! /. Active energy ray When using a curable ink, it is preferable to use at least a part of the curable compound contained in the ink to improve the miscibility with the ink! /.

[0038] In the present invention, in the case of using this cationic polymerization type active energy line curable ink which is preferably a cationic polymerization type active energy ray curable ink used in an ink jet printer, As the replacement liquid, it is preferable to use a cyclic ester compound. Specifically, propylene carbonate, β-propiolatathone, β-butyrolatathone, α-methinoleto β-butyrolatathone, γ-butyrolatathone, γ-bare latataton, δ-valerolataton, ε-one-prolacton, γ-force-prolatatone, and γ-heptanolataton are preferably used.

[0039] In the replacement liquid of the present invention, the viscosity at 25 ° C is preferably lower than the viscosity at 25 ° C of the ink to be newly filled from the viewpoint that the replacement efficiency can be further improved.

[0040] In addition, the substitution liquid of the present invention preferably has a surface tension at 25 ° C of 20 to 40 mN / m from the viewpoint of filling properties. As a means for adjusting the surface tension, it is preferable to include a force S that can use a known surfactant, and a nonionic surfactant.

[0041] The replacement liquid is a force used as an aqueous solution, non-aqueous solution, or the like. It is preferable from the viewpoint of enhancing the effect. In particular, the water content is preferably 2.0% by mass or less, and more preferably 0.5% by mass or less.

[0042] (Inkjet image recording method)

In a preferred embodiment, the replacement liquid of the present invention is brought into contact with an ink supply path before image recording using ink, and then replaced with ink used for image recording to perform image recording.

[0043] That is, a method of performing inkjet image recording after passing through the step of bringing the replacement liquid into contact with the ink contact portion is a preferred mode.

[0044] As the process of bringing the replacement liquid into contact with the ink contact portion, there are a process of filling the ink supply path with the replacement liquid and a process of circulating the replacement liquid in the ink supply path.

[0045] In the case of filling the replacement liquid, there are steps such as installing an ink jet head that is previously filled with the replacement liquid in an ink jet printer and replacing the ink supply path with ink before filling the ink.

[0046] When the replacement liquid is circulated in the ink supply path, it is preferable to circulate the replacement liquid a plurality of times from the viewpoint of enhancing the effect.

[0047] In addition, it is preferable to have a step of discharging the replacement liquid from the ink supply path after the step of contacting the replacement liquid.

[0048] The present invention is particularly effective when the ink contact part is an inkjet head.

[0049] Hereinafter, an example of the case where the image recording method of the present invention has a step of circulating the replacement liquid in the ink supply path, that is, when the replacement liquid is used as a cleaning liquid, see FIG. explain. The drawings show one embodiment of the present invention, and the embodiments of the present invention are not limited to this drawing.

FIG. 1 is a schematic view showing an example of cleaning an ink jet head using the replacement liquid for an ink jet printer of the present invention.

[0051] In FIG. 1, a rubber cap 3 is in close contact with the nozzle section 2 of the inkjet head 1, and is connected to a liquid feed pump 6 (for example, a tubing pump) via a replacement liquid feed pipe 5A. Has been. At this time, the inkjet head 1 heats the ink flow path with a surface heater. It has a mechanism that can do it, and the power of S is preferable!

[0052] The liquid feed pump 6 is connected to the replacement liquid storage container 8 via the liquid feed pipe 5B. In the replacement liquid storage container 8, a fixed volume of the replacement liquid 7 is stored. In the replacement liquid 7, a liquid supply pipe 5C is disposed, and the replacement liquid 7 is placed upstream of the liquid supply pipe 5C. Before feeding the liquid to the inkjet head 1, a filter 9 (for example, a disk filter having a filtration diameter of 3 Hm) for removing foreign substances such as dust contained in the replacement liquid 7 is provided. The replacement liquid 7 is supplied from the replacement liquid inlet 4 provided in the inkjet head 1 via the liquid supply pipe 5D.

In the image recording method shown in FIG. 1, the replacement liquid 7 stored in the replacement liquid storage container 8 is supplied to the inkjet head 1 through the filter 9 and filled or circulated for cleaning the inkjet head 1. It consists of a liquid process A and a discharge process B in which the replacement liquid used for cleaning is discharged to the nozzle part 2 force replacement liquid storage container 8 using a liquid feed pump.

[0054] As a specific cleaning procedure of the ink jet head and a circulation method of the replacement liquid, the liquid supply pump 6 is operated in the replacement liquid circulation path of FIG. After removing the foreign substance and the like from the replacement liquid 7 stored in the storage container 8 with the filter 9 through the liquid supply pipe 5C, the liquid is transferred from the replacement liquid inflow section 4 into the inkjet head 1 heated by a surface heater or the like. The solvent and ink remaining in the inkjet head 1 are dissolved in the replacement liquid 7, and then the replacement liquid 7 is fed out of the inkjet head 1 through the nozzle portion 2. By performing this operation for a certain period of time, the inside of the inkjet head 1 is completely replaced with a replacement liquid, cleaned, and effectively prevents aggregation and the like when the ink is filled in the inkjet head. Monkey.

[0055] (Cationically-polymerized active energy ray-curable ink)

The image forming method of the present invention is particularly effective when the replacement liquid is applied to an ink jet printer using a cationic polymerization type active energy ray-curable ink as the ink jet ink.

The cationic polymerization type active energy ray-curable ink is an ink containing a cationic polymerizable compound and a cationic polymerization initiator. Examples of the cationic polymerizable compound include oxetane groups such as oxetane groups and epoxy groups described in JP-A-2004-315778. Examples of cationic polymerization initiators include arylene sulfone salt derivatives (for example, Adekaoptomer SP-150 manufactured by Asahi Denka Kogyo Co., Ltd.), and arylodium salt derivatives (for example, Rhodia RP-2074), allene ion complex derivatives (for example, Irgacure 261 manufactured by Ciba-Gaigi Co., Ltd.), diazodium salt derivatives, triazine initiators, and other acid generators such as halides. It is done.

Example

[0057] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto. In the examples, “part” or “%” is used as a force to indicate “part by mass” or “% by mass” unless otherwise specified.

[0058] << Preparation of ink >>

(Preparation of pigment dispersion a)

The following two compounds were put in a stainless beaker and dissolved by heating and stirring for 1 hour while heating on a 65 ° C hot plate.

[0059] 9 parts of PB822 (polymer dispersant, acid value 18.5 mg / g KOH, amine value 15.9 mg / g KOH, manufactured by Ajinomoto Fine Techno Co., Ltd.)

OXT—221 (Oxetane compound manufactured by Toagosei Co., Ltd.) 71 parts After the above solution was cooled to room temperature, 20 parts Pigment Red 122 (manufactured by Dainichi Seika Co., Ltd., CFR—321) as a pigment was added to a diameter of 0.5 mm. A glass dispersion was placed in a glass bottle together with 200 g of zirconia beads and dispersed in a paint shaker for 6 hours, after which the zirconia beads were removed to prepare pigment dispersion a.

[Preparation of Ink A]

The following additives were sequentially mixed and stirred, and then filtered through a 3πι Debs filter M ACWA0303 manufactured by Pall to prepare an ink bottle.

[0061] The viscosity of the ink A at 25 ° C was 25 mPa's. The viscosity was measured using a rheometer MCR300 (manufactured by Physica) under the conditions of 25 ° C and Shear Rate = 1000 (1 / s).

[0062] Pigment: Pigment dispersion a 12. 5%

Photopolymerizable compound (alicyclic epoxy compound: Celoxide 2021P, Daicel Chemical Industries 25. 0%

Photopolymerizable compound (Oxetane compound: OXT—221, manufactured by Toagosei Co., Ltd.) 40. 0% Photopolymerizable compound (Oxetane compound: ΟΧΤ—213, manufactured by Toagosei Co., Ltd.) 15. 0% Surfactant: KF—351 ( (Shin-Etsu Chemical Co., Ltd.) 0.4% Basic compound: Triptylamin 0.1% Anthracene derivative: DBA (J 11 Saki Kasei Co., Ltd.) 1.0% Photoacid generator (propylene carbonate 50% solution, UVI6992, Dow Chemical) (Made by company)

6. 0%

<< Preparation of substitution liquid >>

After each additive described in Table 1 was mixed, the mixture was filtered with a 3 Hm depth filter MAC WA0303 manufactured by Paul Co. to prepare substitution solutions 1 to 26.

[0063] The details of the additives abbreviated in Table 1 are as follows.

OXT-213: Oxetane compound (manufactured by Toagosei Co., Ltd.)

OXT—221: Oxetane compound (manufactured by Toagosei Co., Ltd.)

S2021P: Celoxide 2021P (Daicel Chemical Industries)

PC: Propylene carbonate (reagent)

DEGDBE: Diethylene glycol dibutyl ether (Noisorubu BDB Toho Chemical Co., Ltd.)

A: Sodium nitrite

B: Ammonium molybdate

C: 2-Benzothiazole thioacetic acid

D: Sodium pyrophosphate

E: l, 2, 3—Benzotriazonore

F: Sodium oleate

G: Sodium stearate H: Sodium borate

I: Triethanolamine

J: Sodium methylene sulfonate

K: Imidazonole

Each number in Table 1 represents part by mass.

[0065] << Evaluation of Replacement Liquid >>

(Evaluation 1)

A test piece prepared by cutting the filter used in the ink flow path was immersed in the prepared replacement solutions 1 to 14 described above.

[0066] Next, the test piece was immersed in ink A at 70 ° C for 24 hours.

[0067] (Evaluation 2)

The above prepared replacement liquid 15 to 26 was filled into an aluminum ink tank with scratches inside.

Yes

[0068] Next, the replacement liquid in the ink tank was replaced with ink A, and immersed for 24 hours at 70 ° C.

[0069] (Judgment)

After the ink A was stored under heat in each evaluation, it was visually observed whether or not a gel-like precipitate was generated in the ink liquid A, and the precipitation resistance was evaluated according to the following criteria to prevent clogging. One of the gender indicators. The results obtained are shown in Table 1.

[0070] ◯: No occurrence of deposits in ink A in evaluation 1 or evaluation 2

X: Precipitation is observed in ink A in evaluation 1 or evaluation 2.

[0071] [Table 1]

Photopolymerization i Compound Solvent Additive

Substrate evaluation

Addition amount Addition amount Addition amount Remarks Type Type Type Result

(Parts by mass)

1 0XT-213 80.0 PC 20.0 ― ― X Comparative example

2 0XT-213 79.0 PC 20.0 A 1.0 ○ Present invention

3 0XT-213 80.0 DEGDBE 20.0 ― ― X Comparative example

4 0XT-213 79.0 DEGDBE 20.0 A 1.0 〇 Present invention

5 0XT-213 49.0 DEGDBE 50.0 A 1.0 〇 Present invention

6 0XT-213 29.0 DEGDBE 70.0 A 1.0 ○ Present invention

7 0XT-213 79.0 DEGDBE 20.0 B 1.0 ○ Present invention

8 0XT-213 79.0 DEGDBE 20.0 C 1.0 ○ Present invention

9 0XT-213 79.0 DEGDBE 20.0 D 1.0 〇 Akira Motoaki

10 S2021P 80.0 DEGDBE 20.0 ― i X Comparative example

11 S2021P 79.0 DEGDBE 20.0 A 1.0 〇 This invention

12 S2021P 79.0 DEGDBE 20.0 B 1.0 ○ Present invention

13 S2021P 79.0 DEGDBE 20.0 C 1.0 〇 This invention

14 S2021P 79.0 DEGDBE 20.0 D 1.0 ○ Present invention

15 0XT-221 80.0 DEGDBE 20.0 ― ― X Comparative example

16 0XT-221 79.0 DEGDBE 20.0 A 1.0 ○ Present invention

17 0XT-221 79.0 DEGDBE 20.0 B 1.0 ○ Present invention

18 0XT-221 79.0 DEGDBE 20.0 C 1.0 ○ Present invention

19 0XT-221 79.0 DEGDBE 20.0 D 1.0 ○ Present invention

20 0XT-221 79.0 DEGDBE 20.0 E 1.0 ○ Present invention

21 0XT— 221 79.0 DEGDBE 20.0 F 1.0 ○ Present invention

22 0XT-221 79.0 DEGDBE 20.0 G 1.0 〇 This invention

23 0XT-221 79.0 DEGDBE 20.0 H 1.0 ○ Present invention

24 0XT-221 79.0 DEGDBE 20.0 I 1.0 〇 This invention

25 0XT-221 79.0 DEGDBE 20.0 J 1.0 〇 This invention

26 0XT-221 79.0 DEGDBE 20.0 K 1.0 〇 This invention

[0072] << Printer Evaluation of Replacement Liquid >>

Using the inkjet head cleaning apparatus configured with the circulation path shown in FIG. 1, the ejection stability was evaluated using each of the prepared replacement liquid and ink A. The ink supply path in the printer head had an ink contact portion made of aluminum.

Specifically, the inkjet head cleaning apparatus shown in FIG. 1 is used, and the inkjet head 1 includes a piezo-type ink jet recording head (256) in which a solvent is left in an amount corresponding to 5% of the total internal volume. Nozzle) was used, liquid feed pump 6 (tubing pump) was used, and each replacement liquid was circulated for 5 minutes under the condition of 20 mlZmin. [0074] Next! /, The ink jet head 1 washed with each of the replacement liquids is filled with ink A, and the ink jet head 1 is heated to 50 ° C, with a drive frequency of 4 kHz and ink droplets per cycle. The conditions were such that 6 gradations could be expressed by 5 drops of 4p 1 being continuously discharged, and the drive voltage was adjusted so that the droplet velocity was 6 m / s.

[0075] After that, after leaving for 24 hours, the ink was discharged in the same manner as before leaving, and after 30 minutes of continuous discharge, the discharge state of 256 nozzles was visually observed, and the discharge stability was evaluated according to the following criteria. The results obtained are shown in Table 2.

[0076] ○: No nozzle clogging occurs even after 30 minutes of continuous discharge

X: After 30 minutes of continuous discharge, nozzle clogging occurs at several power points or more, which is a practical problem.

[0077] [Table 2]

Replacement liquid number Evaluation result Remarks

1 X Comparative example

2 ○ Invention

3 X Comparative example

4 〇 This invention

5 〇 This invention

6 〇 Invention

〇 present invention

8 〇 Invention

9 〇 Invention

10 X Comparative example

11 〇 This invention

12 ○ Invention

13 ○ Invention

14 〇 This invention

15 X Comparative example

16 〇 This invention

17 〇 This invention

18 O present invention

19 〇 This invention

20 ○ Invention

21 〇 This invention

22 〇 present invention

23 ○ Invention

24 〇 present invention

25 〇 This invention

26 ○ The present invention As is clear from the results of Tables 1 and 2, the image recording method using the replacement liquid of the present invention is capable of agglomeration and the like even after continuous ejection over a long period of time after filling with ink. It can be seen that a stable ejection property without causing a defective emission due to the occurrence is obtained, and that the nozzle clogging prevention property is excellent.

Claims

The scope of the claims

[1] A replacement liquid for an ink jet printer used in an ink jet printer having an ink supply path having an ink contact portion made of metal, characterized in that it contains a compound having a film forming ability with respect to the metal. Replacement fluid for inkjet printers.

[2] The film-forming compound is selected from nitrites, borates, molybdates, carboxylates, phosphates, sulfonates, amines, triazoles, thiazoles and imidazoles. The replacement liquid for an ink jet printer according to claim 1, wherein the replacement liquid is at least one kind.

[3] The replacement liquid for an ink jet printer according to claim 1, wherein the compound having a film-forming ability is a cation surfactant.

[4] An ink jet image recording method for performing ink jet image recording by an ink jet printer having an ink supply path having an ink contact portion made of a metal, wherein the ink contact portion is in the range of claims 1 to 3. An ink jet image recording method comprising: performing ink jet image recording after the step of contacting the replacement liquid for an ink jet printer according to 1 above.

5. The ink jet image recording method according to claim 4, wherein the ink supply path force ink jet head having the ink contact portion is an ink jet head.

[6] The process force of bringing the inkjet printer replacement liquid into contact with the ink supply path is filled with the inkjet printer replacement liquid, or the inkjet printer replacement liquid is circulated in the ink supply path. 6. The ink jet image recording method according to claim 4 or 5, wherein the ink jet image recording method is characterized by the following.

[7] The method according to any one of [4] to [6], further comprising a step of discharging the replacement liquid for an ink jet printer from the ink supply path after the step of contacting the replacement liquid for the ink jet printer. 2. The inkjet image recording method according to claim 1.

[8] The ink jet ink according to any one of claims 4 to 7, wherein the ink jet ink force used in the ink jet printer is a cationic polymerization type active energy ray curable ink. Image recording method.

[9] The inkjet image recording method according to any one of claims 4 to 8