JPH08127979A - Fabric for ink-jet printing, printing method and printed fabric - Google Patents

Abstract

PURPOSE: To obtain fabric printable with a sharp pattern in high concentration and clearly free from blots of picture by ink-jet, by providing cellulose fiber fabric with a cationized polyacrylamide and an alkali substance. CONSTITUTION: This fabric for printing is obtained by providing cellulose fiber fabric using cotton having 25-60mm average fiber length, 0.6-2de average fineness and 70-150twists/cm number of natural twists with 0.1-50wt.% based on dry weight of the cellulosic fiber fabric of a cationized polyacrylamide containing m×structural unit of formula I and n× structural unit of formula II (X is a halogen; R1 and R2 are each methyl or ethyl) in the ratio of m:n=(8:2) to (2:8) and 0.01-5wt.% of an alkali substance such as sodium hydrogen carbonate by a padding method, drying and adjusting the fabric to 13.5 to 108.5wt.% water content. The fabric is provided with ink containing reactive dye by ink-jet printing method, fixing the ink by steam heat and cleaning to give printed fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth for ink-jet printing, a printing method, and a printed material.

[0002]

2. Description of the Related Art Conventionally, as a method for ink-jet recording on a cloth, a cloth is temporarily adhered to a flat support having a non-stretchable surface coated with an adhesive and printing is performed by a printer (Japanese Patent Laid-Open No. 63- No. 6183) or a water-soluble polymer substance that is non-dyeing to the dye used, a water-soluble salt, and a method of inkjet dyeing a cloth treated with an aqueous solution containing any of water-insoluble inorganic fine particles (special feature Kosho 63-315
No. 94), cellulosic fibers are pre-treated with a solution containing an alkaline substance and urea or thiourea and a water-soluble polymer substance, ink-jet dyed with an ink containing a reactive dye, and a dry heat fixing treatment (Japanese Patent Publication No. 4-35351).

[0003]

The purpose of these prior arts is to prevent image bleeding and to obtain a sharp print with a sharp pattern and a high density, but the conventional printing method ( It has not been possible to obtain the same level of color density and vividness as the printed material obtained by screen printing.

Therefore, it has been proposed to pretreat a cotton cloth with a cationized substance to obtain a high-concentration printed matter, obtain a cationized cotton cloth, and print it. However, white-field contamination is severe. White field masking treatment was indispensable (JP-A-5-148775 and JP-A-5-222684).

Therefore, the object of the present invention is to solve the above problems.
That is, the object is to provide a fabric for inkjet printing, a printing method, and a printed material that simultaneously solve the problems of insufficient image density, insufficient color depth, and white spot contamination.

[0006]

The inventor of the present invention has reached the present invention as a result of extensive studies on the above problems. That is, the present invention relates to an ink-jet printing cloth that is dyed with an ink containing a reactive dye and is mainly composed of cellulose fibers, and contains 0.1 to 50% by weight of cationized polyacrylamide (hereinafter referred to as cation), based on the dry weight of the cloth. PAAm), 0.01-
Provided is a cloth for inkjet printing, which contains 5% by weight of an alkaline substance, a printing method using the cloth, and a printed material obtained by the method.

[0007]

[Function] When ink-jet printing with an ink containing a reactive dye, a cationized PAAm and an alkali agent are contained in the cloth, so that a sharp and high-density image without bleeding can be obtained, and at the same time, white spot contamination occurs. It turned out to be resolved. It is considered that the polymerization ratio of the cation group and the amide group is related to the reduction of the white field contamination by using the cationized PAAm. That is, when the number of cation groups is large, the white field contamination is large, whereas when it is small, the white field contamination is reduced, but the improvement of the color density cannot be expected. That is, there is an optimum polymerization ratio.

The present invention will be described in detail below by showing preferred embodiments.

The cloth in the present invention is mainly made of cellulose.
It is composed of fiber or recycled cellulose fiber.
Among them, the cellulose fiber is a fiber containing cellulose as a main component, and examples thereof include natural cellulose fibers such as cotton and hemp. The regenerated cellulose fibers are natural cellulose contained in wood pulp and cotton linter, which are chemically dissolved, regenerated and re-spun into fibers, such as rayon, cupra and polynosic fibers. To be Of these, cotton, which is a cellulose fiber obtained from plant seeds, and viscose rayon, which is regenerated cellulose that is the closest to cotton, are particularly preferably used in the present invention.

The textile for printing refers to woven fabrics, non-woven fabrics, knitted fabrics, napped products and the like. Cellulose fiber 1 as well as cloth
00% is preferable, but if the mixed spinning ratio is 70% or more, preferably 80% or more, a mixed spun woven fabric or a mixed spun non-woven fabric of cellulose fiber and other materials is also used as the ink jet textile printing fabric of the present invention. Can be used.

The moisture content in the cloth which characterizes the cloth for ink jet printing according to the present invention is 13.5 to 108.5.
%, Preferably 14.5 to 88.5%, and more preferably 15.5 to 68.5. Moisture content is 13.
If it is less than 5%, problems occur in terms of color developability and dyeing rate. On the other hand, if the water content exceeds 108.5%, it is not preferable because it causes problems in transportability and especially bleeding.

For the method of measuring the water content in the cloth, JIS L 1019 was referred to.

That is, 100 g of a sample was accurately weighed, put in a dryer at 105 ± 2 ° C. and dried until a constant weight was obtained, followed by washing with water and drying until a constant weight was obtained, and only the fiber portion was dried. The rear weight was measured, and the moisture content in the cloth was determined by the following formula.

[0014]

Moisture content (%) = {(W−W ′) / W ″} × 100 where W: weight before drying, W ′: weight after drying, W ″: weight of fiber portion after washing with water and drying. .

When the cloth for ink-jet printing of the present invention is mainly composed of cellulose fibers, the cloth has the above-mentioned water content and the average fiber length of the cellulose fibers is 25 to 60 mm, preferably 30 to. 5
It is required to be in the range of 5 mm, more preferably 35 to 50 mm. If the average fiber length is less than 25 mm, inconvenience occurs in terms of bleeding and resolution. On the other hand, if the average fiber length exceeds 60 mm, there are problems in transportability and dyeing rate, which is not preferable.

The above average fiber length is in accordance with JIS L
1019, and determined by the staple diagram method.

Alternatively, when the cloth for ink-jet printing of the present invention is composed mainly of cellulose fibers, the cloth has the above-mentioned water content and the average thickness of the cellulose fibers mainly composing the cloth is 0. .6 ~
It must be 2.2d and have an average natural twist number of 70 to 150 / cm.

That is, the average thickness of the fibers is 0.6-2.
It may be within the range of 2d, but is preferably 0.7-2.
The range is 0d, and more preferably 0.8 to 1.8d.
If the average thickness of the fibers is less than 0.6 d, the dyeing rate will be reduced, and inconvenience will occur in terms of transportability. On the other hand, if the average thickness of the fibers exceeds 2.2 d, bleeding occurs and the resolution is problematic, which is not preferable.

The average number of natural twists of the fiber is 70-1.
It may be in the range of 50 / cm, but is preferably 80-
150 / cm, more preferably 90 to 150 / cm.

If the average number of twists of the fiber is less than 70 / cm, the dyeing rate is lowered, and problems such as bleeding and resolution occur. On the other hand, the average natural twist of the fiber is 150 / c
When it exceeds m, it becomes unfavorable in terms of transportability.

For the measurement of the average thickness of the fiber, the micronaire fineness is determined by the micronear method to obtain 9000 m.
It is expressed in d (denier) unit in terms of weight per unit.

Regarding the average number of twists of the fiber, 50 pieces of cellulose were arbitrarily taken out from the cloth, the number of twists was individually measured with a microscope, the number of twists per cm was obtained, and the average value was obtained.

The cationized PAAm that can be used in the present invention includes acrylamide and a quaternary salt compound having m structural units of the following formula (1) and n structural units of the following formula (2) in one molecule. A copolymer can be mentioned.

[0024]

Embedded image

[0025]

[Chemical 4] In the formula, X is halogen, R ₁ and R ₂ are CH ₃ or C ₂ H
_{Is 5} .

Here, m: n is 8: 2 to 2: 8, and more preferably m: n is 6: 4 to 2: 8. When the ratio of the amide group to the quaternary amino group is larger than 8: 2, a satisfactory color density is not obtained, and when the ratio is smaller than 2: 8, white field contamination becomes a problem. Cationized PAAm
The use amount of is preferably 0.1 to 50% by weight based on the dry weight of the fabric. Such an optimum polymerization ratio is characteristic in the inkjet printing method. That is, when the ink-jet method is used, the amount of ink applied (the amount of dye) is much smaller than that of conventional screen printing, so that white-field contamination is relatively small, but the density is difficult to obtain. Therefore, the combination of the present invention provides the best balance between improved color density and white field contamination. If the amount of cationized PAAm is less than 0.1% by weight, problems of bleeding and color density will occur, and if it is more than 50% by weight,
White spot pollution becomes a problem. When the cationized PAAm has a larger molecular weight, a sharp and high-density image with less white field contamination can be obtained.

The alkaline substances used in the present invention include, for example, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; amines such as mono-, di- and triethanolamines; sodium carbonate, potassium carbonate and bicarbonate. Examples thereof include carbonates or bicarbonates of alkali metals such as sodium; metal salts of organic acids such as calcium acetate and barium acetate; and ammonia and ammonia compounds. In addition, sodium trichloroacetate, which becomes an alkaline substance under steaming and dry heat, may be used. Particularly preferred alkaline substances are sodium carbonate and sodium bicarbonate used for dyeing reactive dyes. The amount of the alkaline substance used is 0.01 to the dry weight of the cloth.
5% by weight is preferred. The amount of alkaline substances used is 0.0
If it is less than 1% by weight, the reaction between the dye and the fiber is insufficient,
If the amount is more than 5% by weight, the fiber strength will be decreased, and the hydrolysis of the dye will cause a problem in the color development stability.

As the pretreatment agent, a substance selected from the group consisting of polymers, water-soluble metal salts, urea and thiourea may be used in combination.

Examples of the water-soluble polymer include starch substances such as corn and wheat; cellulosic substances such as carboxymethylcellulose, methylcellulose and hydroxyethylcellulose; sodium alginate, arabic gum, locustite bean gum, tragacanth gum, guar gum, tamarind seeds and the like. Polysaccharides; protein substances such as gelatin and casein; tannin-based substances; natural water-soluble polymers such as lignin-based substances.

Examples of synthetic polymers include polyvinyl alcohol compounds, polyethylene oxide compounds, acrylic acid water-soluble polymers, and maleic anhydride water-soluble polymers. Among these, polysaccharide polymers and cellulose polymers are preferable.

As the water-soluble metal salts, for example, typical ionic crystals such as halides of alkali metals and alkaline earth metals are produced, and the aqueous solution has a pH of 4 to 4.
A compound which is 10. As a typical example of such a compound, for example, in the case of an alkali metal salt, NaC
1, Na ₂ SO ₄ , KCl, CH ₃ COONa, etc., and the alkaline earth metal salts include CaCl ₂ ,
Examples thereof include MgCl ₂ . Of these, salts of Na, K and Ca are preferable.

As the printing ink used for the ink-jet printing cloth of the present invention, an ink-jet printing ink comprising a reactive dye and an aqueous liquid medium is preferably used.

Among them, the dye used in the method of the present invention is preferably a reactive dye having a vinyl sulfone group and / or a monochlorotriazine group. Specific examples of these dyes include C.I. I. Reactive Yellow 2, 15, 37, 42, 76, 95; C.I. I. Reactive Red 21, 22, 24, 33, 45, 11
1, 112, 114, 180, 218, 226; C.I.
I. Reactive Blue 15, 19, 21, 38, 4
9, 72, 77, 176, 203, 220; C.I. I. Reactive Orange 5, 12, 13, 35; C.I. I. Reactive Brown 7, 11, 33, 46; C.I. I. Reactive Green 8, 19; C.I. I. Reactive Violet 2, 6, 22; C.I. I. Examples thereof include those typified by Reactive Black 5, 8, 31, 39 and the like.

Another preferred dye is a reactive dye having at least two reactive groups in one molecule. Specific examples of these dyes include C.I. I. Reactive Yellow 168, 175; C.I. I. Reactive Red 228, 235; C.I. I. Reactive Blue 230, 235; C.I. I. Reactive orange 9
5; C.I. I. Dyes represented by Reactive Brown 37 and the like can be mentioned. These dyes can be used alone, as a mixture, or as a mixture having different hues, but the present invention is not limited to the above dyes.

One or more kinds of these dyes are contained in the ink, and it is possible to use them in combination with those having different hues. The amount used is generally 5 to 5 with respect to the total amount of the ink. 30% by weight, preferably 5 to 25% by weight,
It is more preferably in the range of 5 to 20% by weight. 5% by weight
If the amount is less than the above range, the color density is insufficient, while if it exceeds 30% by weight, the ink ejection suitability becomes insufficient.

In the ink used in the method of the present invention, chlorine ions and / or sulfate ions are contained in the ink in an amount of 10 to 20000 ppm based on the reactive dye contained in the ink.
It is also a preferable embodiment to add about 0.1 to 30 ppm of silicon, iron, nickel and / or zinc in the ink in total. When ink jet recording is performed on the ink jet cloth of the present invention using such an ink, the dyeing rate is high, there is no bleeding and the ink is clear,
Moreover, it is possible to obtain a dyed product with a high concentration. Further, by using such an ink, it is possible to perform printing with high ejection performance without causing clogging or the like in the head nozzle for a long period of time.

Further, the total amount of calcium and / or magnesium in the ink is 0.1 to 30 ppm, preferably 0.2 to 20 pp in combination with the above metal salt.
m, more preferably in the range of 0.3 to 10 ppm, and the dyeing rate can be further improved.

Water, which is an essential component of the liquid medium constituting the ink used in the textile printing method of the present invention, is 30 to 90% by weight, preferably 40 to 90% by weight, more preferably 50, based on the total amount of the ink. Used in the range of up to 85% by weight.

The above are the essential components of the ink jet printing ink used in the method of the present invention, but it is also possible to use together a general organic solvent as the liquid medium of the ink.

For example, ketones or keto alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, tripropylene glycol, polyethylene glycol, polypropylene glycol, etc. Oxyethylene or oxypropylene addition polymer; ethylene glycol, propylene glycol, trimethylene glycol, butylene glycol, hexylene glycol and other alkylene groups containing 2 to 6 carbon atoms; Triols such as 6-hexanetriol; thiodiglycol; glycerin; ethylene glycol monomethyl (or ethyl) ether, diethylene glycol Rumonomechiru (or ethyl)
Lower alkyl ethers of polyhydric alcohols such as ethers and triethylene glycol monomethyl (or ethyl) ethers; lower dialkyl ethers of polyhydric alcohols such as triethylene glycol dimethyl (or ethyl) ether and tetraethylene glycol dimethyl (or ethyl) ether Examples: sulfolane, N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone and the like.

The content of the water-soluble organic solvent as described above is
Generally, it is in the range of 3 to 60% by weight, preferably 5 to 50% by weight, based on the total weight of the ink.

When the above liquid medium is used in combination, it can be used alone or as a mixture, but the most preferable liquid medium composition is one containing at least one polyhydric alcohol. Among them, thiodiglycol alone or a mixed system of diethylene glycol and thiodiglycol is particularly preferable.

The main components of the ink used in the method of the present invention are as described above, but other various dispersants, surfactants, viscosity modifiers, surface tension modifiers, optical brighteners and the like may be added as required. Can be added.

For example, viscosity adjusting agents such as polyvinyl alcohol, celluloses and water-soluble resins; various cationic or nonionic surfactants; surface tension adjusting agents such as diethanolamine and triethanolamine; pH by buffer solution.
Examples thereof include regulators and fungicides.

The printing method of the present invention is a method of printing the above-mentioned printing ink on the ink-jet printing cloth of the present invention. The ink jet recording method used may be any conventionally known ink jet recording method. For example, the method described in Japanese Patent Application Laid-Open No. 54-59936 discloses a method in which ink subjected to the action of heat energy has a sudden volume. The method that causes a change and ejects ink from the nozzle by the action force due to the change in the state is the most effective. In such a system, stable printing can be performed by recording on the ink-jet printing cloth of the present invention.

As conditions for obtaining a particularly effective print, it is preferable that the ejected liquid droplets are in the range of ²⁰ to 200 pl and the ink ejection amount is in the range of 4 to 40 nl / mm ² .

As an example of an apparatus suitable for performing printing using the ink-jet printing cloth of the present invention, thermal energy corresponding to a recording signal is applied to the ink in the chamber of the recording head, and a droplet is generated by the thermal energy. There is a device for making it.

The structure of an example of the head, which is the main part of the apparatus, is shown in FIGS. 1, 2 and 3. FIG. 1 is a cross-sectional view of the head 13 taken along the ink flow path, and FIG. 2 is A- of FIG.
FIG. 3 is a sectional view taken along line B, and FIG. 3 is an external view of a multi-head in which a large number of heads shown in FIG. 1 are arranged.

In FIG. 1, the head 13 is a glass, ceramics or plastic plate having a groove 14 through which ink passes, and a heating head 15 (FIG. 1) used for thermal recording.
1 and 2 show one example, but not limited thereto). Fever head 15
Is a protective film 16 formed of silicon oxide or the like, aluminum electrodes 17-1 and 17-2, a heating resistor layer 18 formed of nichrome or the like, a heat storage layer 19, and a substrate 20 having a good heat dissipation property such as alumina. There is.

The ink 21 has a discharge orifice (fine hole) 2
2, the meniscus 23 is formed by the pressure P.

When an electric signal is applied to the electrodes 17-1 and 17-2, the area indicated by n of the heating head 15 rapidly generates heat, and bubbles are generated in the ink 21 in contact therewith, and the pressure thereof is generated. Then, the meniscus 23 protrudes, the ink 21 is ejected, becomes a recording droplet 24 from the orifice 22, and flies toward the cloth 25 mainly composed of the cellulose fiber of the present invention.

The multi-head shown in FIG. 3 is manufactured by closely adhering a glass plate 27 having multi-grooves 26 and a heating head 28 similar to that described in FIG.

FIG. 4 shows an example of an ink jet recording apparatus incorporating such a head.

In FIG. 4, reference numeral 61 denotes a blade as a wiping member, one end of which is held by a blade holding member to become a fixed end, which is in the form of a cantilever. The blade 61 is arranged at a position adjacent to the recording area of the recording head, and in the case of this example, is held in a protruding form in the moving path of the recording head. Reference numeral 62 denotes a cap, which is disposed at a home position adjacent to the blade 61, and has a configuration in which it moves in a direction perpendicular to the moving direction of the recording head and contacts the ejection port surface to perform capping. Further, an absorber 63 is provided adjacent to the blade 61 and, like the blade 61, is held in a form protruding into the movement path of the recording head. The blade 61, the cap 62, and the absorber 63 constitute a discharge recovery section 64,
The blade 61 and the absorber 63 remove water, dust and the like from the ink ejection port surface. Reference numeral 65 denotes a recording head having ejection energy generating means, which ejects ink onto a cloth containing cellulose fibers facing the ejection port surface where ejection ports are arranged to perform recording, and 66 is a recording head in which the recording head 65 is mounted. A carriage for moving 65. The carriage 66 is slidably engaged with the guide shaft 67, and a part of the carriage 66 is connected to a belt 69 driven by a motor 68 (not shown). As a result, the carriage 66 can move along the guide shaft 67, and the recording head 65 can move the recording area and its adjacent area.

Numeral 51 is a cloth feeding portion for inserting the cloth mainly composed of cellulose fibers of the present invention, and numeral 52 is a cloth feed roller driven by a motor (not shown). With these configurations, the cloth of the present invention is applied to the position facing the ejection opening surface of the recording head, and as the recording progresses, the discharge roller 5 is discharged.
It is discharged to the discharge part where 3 is arranged.

In the above structure, when the recording head 65 returns to the home position after recording is completed, the cap 62 of the head recovery section 64 is retracted from the movement path of the recording head 65, but the blade 61 projects into the movement path. There is. As a result, the ejection port surface of the recording head 65 is wiped. When the cap 62 comes into contact with the ejection surface of the recording head 65 to perform capping, the cap 62 moves so as to project into the movement path of the recording head.

When the recording head 65 moves from the home position to the recording start position, the cap 62 and the blade 61 are in the same positions as the above wiping positions. As a result, the ejection opening surface of the recording head 65 is wiped even during this movement. The above-mentioned movement of the recording head to the home position is performed not only at the end of recording or at the time of ejection recovery, but also at a predetermined interval to the home position adjacent to the recording area while the recording head is moving in the recording area for recording. However, the wiping is performed along with this movement.

As described above, the printing ink applied to the ink-jet printing cloth of the present invention by the method of the present invention is:
In this state, since it is merely adhering to the cloth, it is preferable to subsequently carry out the reaction fixing step of the dye on the fiber and the removing step of the unfixed dye. Such a reaction fixing step and a method for removing unreacted dye may be a conventionally known method, for example, a steaming method, an HT steaming method, a thermofix method, when a cloth which has been previously alkali-treated is not used, It can be carried out according to a conventionally known method of washing after treatment by an alkali pad steam method, an alkali blotch steam method, an alkali shock method, an alkali cold fix method or the like.

[0059]

EXAMPLES Next, the present invention will be described more specifically with reference to Examples and Comparative Examples. In addition, unless otherwise specified, "parts in the text" and "%" are based on weight. Production of Ink (A) -Reactive Dye (CI Reactive Yellow 95) 10 parts-Thiodiglycol 24 parts-Diethylene glycol 11 parts-Potassium chloride 0.004 parts-Sodium sulfate 0.002 parts-Sodium metasilicate 0. 001 parts-Iron chloride 0.0005 parts-Water 55 parts All the above components are mixed, and the mixed solution is mixed with sodium hydroxide.
The mixture was adjusted to H8.4, stirred for 2 hours, and then filtered with a Fluoropore filter FP-100 (trade name, manufactured by Sumitomo Electric Industries, Ltd.) to obtain an inkjet printing ink (A). Manufacture of ink (B) -Reactive dye (CI Reactive Red 24) 10 parts-Thiodiglycol 15 parts-Diethylene glycol 10 parts-Tetraethylene glycol dimethyl ether 5 parts-Potassium chloride 0.04 parts-Sodium sulfate 0.01 Part-sodium metasilicate 0.001 part-iron chloride 0.0005 part-nickel chloride 0.0002 part-water 60 parts All of the above components were mixed, and the mixed solution was mixed with sodium hydroxide.
The mixture was adjusted to H7.9, stirred for 2 hours, and then filtered with Fluoropore Filter FP-100 (trade name, manufactured by Sumitomo Electric Industries, Ltd.) to obtain an inkjet printing ink (B). Manufacture of Ink (C) -Reactive Dye (CI Reactive Blue 72) 13 parts-Thiodiglycol 23 parts-Triethylene glycol monomethyl ether 6 parts-Potassium chloride 0.05 parts-Sodium metasilicate 0.001 parts- Iron chloride 0.0005 parts ・ Zinc chloride 0.0003 parts ・ Water 58 parts Mix all the above components and pour the mixture with sodium hydroxide.
The mixture was adjusted to H8.3, stirred for 2 hours, and then filtered with Fluoropore Filter FP-100 (trade name, manufactured by Sumitomo Electric Industries, Ltd.) to obtain an inkjet printing ink (C). Production of Ink (D) -Reactive Dye (CI. Reactive Brown 11) 2 parts-Reactive Dye (CI Reactive Orange 12) 1.5 parts-Reactive Dye (CI Reactive Black 39) 6. 5 parts-thiodiglycol 23 parts-diethylene glycol 5 parts-isopropyl alcohol 3 parts-potassium sulfate 0.01 parts-sodium metasilicate 0.001 parts-iron sulfate 0.0005 parts-nickel sulfate 0.0003 parts-zinc sulfate 0 0.0003 parts Water 59 parts All the above components were mixed, and the mixed solution was mixed with sodium hydroxide.
The mixture was adjusted to H8.2, stirred for 2 hours, and then filtered using Fluoropore Filter FP-100 (trade name, manufactured by Sumitomo Electric Industries, Ltd.) to obtain an inkjet printing ink (D).

(Example 1) The average fiber length of the fibers is 40 m.
m, average fiber thickness 1.3d, average natural twist number 90 /
cm 100% cotton woven fabric formed using Egyptian cotton is a copolymer of acrylamide and diallyldimethylammonium chloride (copolymerization ratio 1: 1; molecular weight 100
3) Soak in an aqueous solution of 3% and 2% sodium bicarbonate,
Pads were squeezed at a squeezing rate of 100%, dried, and then adjusted to have a water content of 20%.

The ink jet printing inks (A to D) obtained as described above were mounted on this woven cloth in a color bubble jet printer BJC-600 (trade name, manufactured by Canon Inc.) to obtain solid samples of 2 × 10 cm for each color. Printing was performed and fixing was performed by steam heat treatment at 102 ° C. for 8 minutes. Then, this was washed with water, and the sharpness, bleeding property and white spot contamination of the printed material were evaluated. Table 1 shows the results.

Example 2 Instead of the copolymer of acrylamide and diallyldimethylammonium chloride of Example 1 (copolymerization ratio 1: 1, molecular weight 1,000,000), a similar copolymerization ratio of 2: 3 was used. A printed material was obtained in the same manner as in Example 1 except that the coalescence was used. The results are shown in Table 1.

Example 3 A copolymer of acrylamide and diallyldiethylammonium chloride (copolymerization ratio 1: 1) was used instead of the copolymer of acrylamide and diallyldimethylammonium chloride of Example 1. A printed material was obtained in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 1 The cloth used in Example 1 was
Soak in an aqueous solution of 2% sodium bicarbonate, squeeze rate 10
The pad was dried at 0%, dried, and then adjusted to have a water content of 20%. The same inkjet printing inks (A to D) as in Example 1 were used for printing on the woven fabric in the same manner, and the resulting printed product was evaluated for sharpness, bleeding property and white spot contamination. The results are shown in Table 1.

As a result, there was bleeding as compared with Example 1, and the dyeing rate was inferior because the density of each printed material was low.

Comparative Example 2 The cloth used in Example 1 was
Acrylamide and diallyldimethylammonium chloride copolymer (copolymerization ratio 1: 1, molecular weight 1,000,000) 60
% And sodium bicarbonate 2%, soaked in an aqueous solution tank, padded at a squeezing rate of 100% and dried, and then the moisture content is 20%.
I adjusted it to be. The same inkjet printing inks (A to D) as in Example 1 were used for printing on the woven fabric in the same manner, and the resulting printed product was evaluated for sharpness, bleeding property and white spot contamination. Table 1 shows the results.

As a result, white spot contamination was more noticeable than in Example 1.

Comparative Example 3 The fabric used in Example 1 was
Acrylamide and diallyldimethylammonium chloride copolymer (copolymerization ratio 1: 1, molecular weight 1,000,000) 3%
It was dipped in the aqueous solution tank described above, padded at a squeezing rate of 100% and dried, and then adjusted to have a water content of 20%. The same inkjet printing inks (A to D) as in Example 1 were used to print on the woven fabric in the same manner, and the resulting printed product was evaluated for sharpness, bleeding property and white spot contamination. Table 1 shows the results.

As a result, bleeding was more noticeable than in Example 1, and the density of each printed material was low, resulting in poor dyeing properties (Comparative Example 4). The cloth used in Example 1 was treated with acrylamide. Diallyldimethylammonium chloride copolymer (copolymerization ratio 1: 1, molecular weight 1,000,000) 3% and sodium bicarbonate 8% Soak in an aqueous solution tank, pad with a squeezing rate of 100% and dry, then moisture content of 20% I adjusted it to be. The same inkjet printing inks (A to D) as in Example 1 were used for printing on this woven fabric by the same method.
The resulting prints were evaluated for sharpness, bleeding property and white spot contamination. Table 1 shows the results.

As a result, the dyeing ratio was inferior to that of Example 1 because the density of each printed material was low.

Comparative Example 5 The fabric used in Example 1 was
Acrylamide and diallyldimethylammonium chloride copolymer (copolymerization ratio 9: 1, molecular weight 1,000,000) 3%
Then, it was dipped in a 2% aqueous solution of sodium bicarbonate, padded at a squeezing rate of 100%, dried, and then adjusted to have a water content of 20%. The same inkjet printing inks (A to D) as in Example 1 were used for printing on the woven fabric in the same manner, and the resulting printed product was evaluated for sharpness, bleeding property and white spot contamination. Table 1 shows the results.

As a result, the dyeing ratio was inferior to that of Example 1 because the density of each printed material was low.

Comparative Example 6 The cloth used in Example 1 was
Acrylamide and diallyldimethylammonium chloride copolymer (copolymerization ratio 1: 9, molecular weight 1 million) 3%
Then, it was dipped in a 2% aqueous solution of sodium bicarbonate, padded at a squeezing rate of 100%, dried, and then adjusted to have a water content of 20%. The same inkjet printing inks (A to D) as in Example 1 were used for printing on the woven fabric in the same manner, and the resulting printed product was evaluated for sharpness, bleeding property and white spot contamination. Table 1 shows the results.

As a result, white-field contamination was more noticeable than in Example 1.

Comparative Example 7 The cloth used in Example 1 was
Acrylamide and diallyldimethylammonium quaternary salt compound copolymer (copolymerization ratio 1: 1, molecular weight 500,000) 3%
Then, it was dipped in a 2% aqueous solution of sodium bicarbonate, padded at a squeezing rate of 100%, dried, and then adjusted to have a water content of 20%. The same inkjet printing inks (A to D) as in Example 1 were used for printing on the woven fabric in the same manner, and the resulting printed product was evaluated for sharpness, bleeding property and white spot contamination. Table 1 shows the results.

As a result, compared with Example 1, the density of the printed material was low and white-field contamination was noticeable.

[0077]

[Table 1] ¹⁾ The average fiber length of the fibers, which is generally standard cloth, is 45
Fabric using mm mm rice cotton (water content is 8.
5%), recording was performed in the same manner as in the example without adjusting the water content, and the reflectance of the obtained recording material at the maximum absorption wavelength was measured.
The average value was set to 1. Similarly, the reflectance of the maximum absorption wavelength of the recorded matter of each example was measured, and the average value was compared. In the case of blended spinning, the same measurement was carried out with a fabric in which only the cotton portion was replaced with the standard cotton, and the average value was 1
It is evaluated as.

The evaluation criteria are as follows. ◯: 0.9 or less Δ: 0.9 to 0.95 x: 0.95
²⁾ The irregular disorder of the straight line portion of the edge was visually observed and judged. The evaluation criteria are as follows. ◯: No turbulence Δ: Slight turbulence ×: A lot of turbulence ³⁾ Solid print an unprinted sample that had been steam-heat treated,
1 with a steam-heated sample at a bath ratio of 1 Kg / 30 L
After washing with water for 5 minutes, the K / S of the unprinted cloth was measured and evaluated by the difference from the K / S value before washing. The evaluation criteria are as follows.

[0079]

## EQU2 ## K / S = (1-R) ² / 2R (R: reflectance at the maximum absorption wavelength) ○: 0.2 or less Δ: 0.2 to 0.5 ×: 0.5 or more

[0080]

As described above, according to the ink-jet printing cloth of the present invention, there is no bleeding and it is clear and
It is possible to obtain a highly concentrated dyed product.

Further, the printing method of the present invention can provide a good dyed product with little white spot contamination.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a head portion of an inkjet recording apparatus.

FIG. 2 is a cross-sectional view of a head portion of an inkjet recording device.

FIG. 3 is an external perspective view of a head in which the head shown in FIG. 1 is multi-headed.

FIG. 4 is a perspective view showing an example of an inkjet recording apparatus.

[Explanation of symbols]

 13 Head 14 Ink Groove 15 Heat Generation Head 16 Protective Film 17-1, 17-2 Aluminum Electrode 18 Heat Generation Resistor Layer 19 Heat Storage Layer 20 Substrate 21 Ink 22 Orifice 23 Meniscus 24 Small Drop 25 Cloth 26 Multi-Groove 27 Glass Plate 28 Heat generating head 51 Cloth supply section 52 Cloth feed roller 53 Cloth discharge roller 61 Wiping member 62 Cap 63 Ink absorber 64 Ejection recovery section 65 Recording head 66 Carriage

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shoji Koike 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yui Shirota 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Mariko Suzuki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (7)

[Claims] 1. A fabric for ink-jet printing, which is mainly composed of cellulose fibers and which can be dyed with an ink containing a reactive dye, based on the dry weight of the fabric.
A fabric for inkjet printing, comprising 0.1 to 50% by weight of cationized polyacrylamide and 0.01 to 5% by weight of an alkaline substance. 2. The cationized polyacrylamide is
M structural units represented by the following formula (1), the following formula (2)
Having n structural units represented by, and m: n is 8: 2 to 2:
The fabric for inkjet printing according to claim 1, which is a compound within the range of 8. Embedded image Embedded image (In the formula, X is halogen, R ₁ and R ₂ are CH ₃ or C ₂
It is H _5. ) 3. The average fiber length of the cellulose fibers is 25.
.About.60 mm, the average thickness of the fibers is 0.6 to 2.2 d, and the average number of natural twists is 70 to 150 / cm.
The inkjet printing cloth described. 4. The moisture content of the cloth is 13.5 to 108.
It is 5%, and the cloth for ink-jet printing according to claim 1 or 2. 5. A printing method for applying a printing ink to a cloth, wherein the cloth is the ink-jet printing cloth according to any one of claims 1 to 4, the ink is applied to the cloth, and then a dyeing treatment is performed. A textile printing method, which comprises performing a washing treatment and then performing a washing treatment. 6. The textile printing method according to claim 5, wherein the inkjet method is an inkjet method utilizing heat energy. 7. A printed material printed by the printing method according to claim 5.