JP5840564B2 - Printing method and printing apparatus - Google Patents

Description

  The present invention relates to a printing method and a printing apparatus, and more particularly, to a method and an apparatus for printing on an object to be printed by an inkjet method.

  Inkjet systems are widely used because they can print at high speed with a simple mechanism, and printing has been attempted not only on paper but also on various objects to be printed such as cloth, woven fabric, and smooth resin surface. In recent years, the forms and materials of these printed materials have been diversified, and it is difficult to print the printed materials uniformly.

  Therefore, in order to uniformly print the printed material, a printing method has been proposed in which an ink droplet is ejected by an ink jet method after supplying a flocculant for increasing the viscosity of the ink to the printed material. The ink that has been deposited on the printing material is fixed by increasing the viscosity by agglomeration reaction with the flocculant on the surface of the printing material, so that the surface of the printing material can be printed uniformly. However, since the ink that has landed on the surface of the substrate to be printed is aggregated instantaneously, the ink cannot penetrate into the interior of the substrate to be printed, and it is difficult to dye the substrate to be printed in a deep color. It was.

  Therefore, as a technique for printing up to the inside of the printing material, for example, as disclosed in Patent Document 1, after supplying ink to the printing material by the ink jet method, the flocculant is supplied, and further the ink is supplied by the ink jet method. Inkjet textile printing methods have been proposed.

JP 2004-169248 A

In the ink jet textile printing method described in Patent Document 1, when the ink supplied first penetrates into the printed material, it is fixed by the flocculant, and then the supplied ink is fixed on the surface of the printed material. It is possible to print the surface of the printing object uniformly and to the inside of the printing object.
However, when decorative members such as sequins, fasteners, hooks, and buttons are attached on the surface of the printed material, it is difficult to print the entire printed material up to the inside. In other words, in the area where the decorative member of the printing object is not attached, the ink ejected by the ink jet method can be directly landed on the surface, so that the ink can penetrate and print to the inside. When the decorative member is attached, the attachment region that becomes a shadow is blocked by the decorative member, so that the ink cannot be directly landed, and it is difficult to permeate the ink to the inside.
For this reason, in the case where the attachment area of the printing material is printed to the inside, it is necessary to attach the decorative member to the printing material after printing the entire printing material to the inside in advance. However, with this method, there is a problem in that the printed material on which various printing is performed must be prepared in advance before the decorative member is attached, and it is not possible to quickly respond to the demand for printing that fluctuates according to market trends. was there.

  The present invention has been made to solve the above-described conventional problems, and provides a printing method and a printing apparatus capable of printing up to an attachment area on a printing object to which a decorative member is attached. For the purpose.

  In order to achieve the above object, the printing method according to the present invention applies to a substrate to be printed on which printing ink cannot be directly landed on the decorative member mounting region due to the decorative member partially mounted on the surface. In this method, printing is performed by the ink jet method, and the first ink printing causes the ink to land only on the peripheral portion of the attachment area of the printing object and penetrate the ink to the attachment area, thereby agglomerating to increase the viscosity of the ink. The agent is supplied to at least an area other than the attachment area of the printing object, and ink is ejected onto the area other than the attachment area of the printing object by the second ink printing to react with the aggregating agent.

Here, after the first ink printing, the flocculant can be supplied after performing a penetration promoting process for promoting the penetration of the ink supplied by the first ink printing into the attachment region.
Further, the permeation promoting process can be performed by supplying a permeating liquid that does not contain a coloring material to the outside of the ink landing position with respect to the attachment region. Further, the penetration promotion process can be performed by exposing the attachment region to a steam environment. Further, the penetration promotion process can be performed by supplying liquid mist to the attachment region.
Note that printing refers to applying a coloring material or the like to a printing material. For example, the printing material is dyed by printing, or a pattern (including patterns other than characters and symbols) is printed on the printing material. Can be granted.

Further, the supply amount of the flocculant is preferably set so that the viscosity increases when the ink supplied by the second ink printing penetrates the thread constituting the printing material by a predetermined distance.
Further, after droplets are ejected by the second ink printing toward the printing material, the flocculant is further supplied to the printing material, whereby the first ink printing and the second ink printing cause the inside of the printing material. It is preferable to fix the ink supplied to.

In addition, the ink ejected by the first ink printing and the second ink printing can be selected to be anionically charged, and the aggregating agent can be selected to be cationically charged. In addition, the ink ejected by the first ink printing and the second ink printing may be selected to be cationically charged, and the aggregating agent may be selected to be anionic.
Further, the decorative member is made of a resin material or a metal material, and the printed material is made of a woven or knitted material made of yarns made up of a plurality of fibers, and can have regions where the crossing frequencies of the yarns are different. Moreover, it is preferable that a decoration member is a coupling member of a fastener.

  Further, the printing apparatus according to the present invention performs printing by an inkjet method on an object to be printed on which the ink cannot be directly landed on the attachment region of the decorative member due to the decorative member partially attached on the surface. A first ink supply device that ejects ink onto a substrate to be printed so that the ink is landed only on a peripheral portion of the attachment region and permeates the ink to the attachment region; and a first ink supply device When the ejected ink has penetrated to the attachment area, a flocculant supply device for supplying a coagulant for increasing the viscosity of the ink to at least an area other than the attachment area of the substrate to be printed, and an area other than the attachment area of the substrate to be printed And a second ink supply device that causes ink to drop and react with the coagulant supplied from the coagulant supply device.

  According to this invention, after the ink is landed only on the periphery of the attachment area of the printing object by the first ink printing and the ink is permeated to the attachment area, the flocculant is at least other than the attachment area of the printing object. Since the ink that is supplied to the region and ejected onto the region other than the attachment region by the second ink printing is reacted with the flocculant, printing can be performed up to the attachment region with respect to the printing object to which the decorative member is attached. It becomes possible.

It is a block diagram which shows the structure of the printing apparatus which performs the printing method which concerns on Embodiment 1 of this invention. It is a figure which shows the to-be-printed material to which the decoration member was attached. It is sectional drawing which shows the thread | yarn which comprises a to-be-printed material. It is sectional drawing which shows a mode that ink and an aggregating agent are supplied to a to-be-printed object. FIG. 5 is a block diagram illustrating a configuration of a printing apparatus that performs a printing method according to a second embodiment. It is sectional drawing which shows a mode that an ink, a penetrating liquid, and a coagulant | flocculant are sequentially supplied to a to-be-printed object with the printing method which concerns on Embodiment 2. FIG. 6 is a diagram illustrating a configuration of a printing apparatus that performs a printing method according to a third embodiment. FIG. 6 is a block diagram illustrating a configuration of a printing apparatus that performs a printing method according to a fourth embodiment.

Hereinafter, the present invention will be described in detail based on a preferred embodiment shown in the drawings.
Embodiment 1
FIG. 1 shows the configuration of a printing apparatus that performs a printing method according to Embodiment 1 of the present invention. In this printing apparatus, a first ink supply device 1 that ejects ink A onto a part of a printing material P by an ink jet method and a flocculant B for increasing the viscosity of the ink are supplied to the printing material P. A flocculant supply device 2, a second ink supply device 3 that ejects ink C onto the printing material P by an inkjet method, and a fixing device 4 that fixes the ink A and the ink C supplied to the printing material P Have.
For example, as shown in FIG. 2, the printed material P has a decorative member M made of a resin material or a metal material such as a sequin, a fastener coupling member, a hook or a button partially attached on the surface. In addition, the attachment region R of the decorative member M, that is, the region covered with the decorative member M and shaded by the decorative member M is blocked by the decorative member M, and ink cannot be directly landed from above by the ink jet method.

The first ink supply device 1 performs ink droplet ejection by the ink jet method so that the ink A is landed only on the periphery of the attachment region R of the printing material P to which the decoration member M is attached. The ink A that has landed on the printing material P penetrates from the periphery of the attachment region R into the attachment region R.
The flocculant supply device 2 is arranged on the downstream side of the first ink supply device 1 with respect to the moving direction of the printing material P, and supplies the flocculant B to the printing material P. For example, the printing material P can be supplied to the whole printing material P by immersing the printing material P in the flocculant B using the dip method. The flocculant B supplied to the entire printed material P penetrates into the region other than the attachment region of the printed material P and also into the attachment region R, and the flocculant B that has penetrated into the attachment region R is the first. Aggregates with the ink A supplied from the ink supply device 1. This aggregation reaction increases the viscosity of the ink A, and the movement of the ink A in the attachment region R is suppressed. The flocculant B supplied to the area other than the attachment area is for reacting with the ink C supplied by the second ink supply device 3 to be continuously printed to cause the ink C to aggregate.
The second ink supply device 3 is disposed on the downstream side of the flocculant supply device 2 with respect to the moving direction of the printing material P, and deposits ink C in a region other than the attachment region R of the printing material P. . The ink C is subjected to an agglomeration reaction with the aggregating agent B supplied from the aggregating agent supply device 2 while penetrating the region other than the attachment region R of the printing material P from the ink landing position by about the thickness of the yarn. The viscosity is increased and the penetration stops.

  Here, the inks A and C ejected from the first ink supply device 1 and the second ink supply device 3 are subjected to agglomeration reaction with the coagulant B supplied from the coagulant supply device 2. An agent is contained, and the viscosity of the ink increases due to this aggregation reaction. The dyes contained in the inks A and C are those corresponding to the material of the printing material P. For example, when the printing material P is made of polyester fiber, the disperse dye is used, and the printing material P is cotton. A reactive dye can be used in the case where the printed material P is made of nylon and animal fibers (such as hair or silk), and an acidic dye can be used. Note that the dyes of the same color are used for the ink A and the ink C, and the color of the attachment area and the other area can be made the same.

Further, the supply amount of the flocculant B supplied from the flocculant supply device 2 is within the thickness range of the yarn constituting the printing material P from the landing position of the ink C supplied from the second ink supply device 3. Alternatively, a predetermined viscosity is obtained while penetrating a distance within the weaving pitch range of the printing material P, and the thickness is set so as not to diffuse in the direction along the printing material P beyond the range by the capillary force of the surroundings. .
The flocculant B is used until the ink A supplied from the first ink supply device 1 and the ink C supplied from the second ink supply device 2 are fixed to the printing material P by the fixing device 4. The supply amount is set so as to prevent ink movement caused by a partial capillary force difference of the printing material P, so that the ink A stays in the attachment region R and the ink C stays in a region other than the attachment region R. Is preferred.

  The fixing device 4 is disposed on the downstream side of the second ink supply device 3 with respect to the moving direction of the printing material P, and includes a drying device 5, a color processing device 6, and a washing and drying device 7. The drying device 5 dries the printing material P supplied with ink. The color processing device 6 performs color processing according to the material of the printing material P and the type of dye. For example, when a disperse dye is used, color development can be performed by heating color treatment or high-temperature steam treatment, and when an acid dye and a reactive dye are used, color development can be performed by high-temperature steam treatment. The cleaning / drying device 7 is for cleaning and drying the dyed printing material P and finishing it. Residual unreacted substances can also be removed using an alkaline reduction cleaning solution.

  Here, as shown in FIG. 2, the printed material P can be one having areas with different fiber densities, for example, one that is plain woven or one that is twilled. It is also possible to use a cloth in which different weaves are incorporated. As shown in FIG. 3, the yarn Y constituting the printing material P is configured by a plurality of fibers F gathered. For example, an intersection portion where the yarn Y is woven and a portion other than the intersection portion, Differences in the density of fibers constituting the yarn Y occur in portions where the crossover frequency of the warp and weft is different, where the weaving pattern has changed, where the fiber thickness is partially etched and the fiber thickness is different.

Usually, the ink supplied to the regions having different fiber densities is permeated in the thickness direction of the printing material P at a permeation speed corresponding to the size of the gap between the fibers F, that is, the fiber density. After the ink has permeated into the gaps between the fibers, the permeation of the printing material P in the thickness direction stops, and ink movement due to the capillary force difference occurs. That is, a capillary force is generated for the ink that has permeated into the gaps between the fibers F due to the difference in the fiber density or the contact angle with the ink between the adjacent regions of the printing material P. The capillary force is a force acting on the ink, and when the wettability is large or the interfiber distance is small, the capillary force is large, and when the wettability is small or the interfiber distance is large, the capillary force is small. . As a result, the capillary force acts from the surrounding area where the fiber density is high, so that the ink is moved to the area where the capillary force is high. When the fibers F are the same material, the contact angle with the ink is the same, so the ink moves to a region where the fiber density is high.
In this way, the ink deposited on the printing material P penetrates the printing material P in the thickness direction at a penetration speed according to the fiber density to fill the gaps between the fibers F, and the thickness distance of the yarn Y Alternatively, after penetrating up to the back surface of the printing material P, it moves in the surface direction of the printing material P according to the capillary force working from the surrounding area. For this reason, the final penetration of the ink in the printing medium P is caused by the difference in the fiber density, which makes the penetration of the ink non-uniform.
In the present embodiment, by controlling the permeation of the ink C supplied from the second ink supply device 3 by the agglutination reaction with the aggregating agent B, the ink C causes the printed material P to become uneven as described above. Infiltration can be suppressed.
In addition, as a material of the to-be-printed material P, the cloth woven with the yarn comprised from synthetic fibers, such as polyester, nylon, an acryl, animal or vegetable fibers, such as cotton, hair, silk, or the knitted knitting Can be used.

Next, the aggregation reaction between the coagulant contained in the inks A and C and the coagulant B will be described.
As the inks A and C, anionically charged inks can be used. For example, an ink containing a pigment dispersion charged with an anionic surfactant and adjusted with a charge control agent having an anionic polarity can be used. Alternatively, an anionic dye aqueous solution can be used.
In order to adjust the viscosity of the ink and stabilize particle dispersion, an aqueous polymer dispersion such as vinyl acetate, acrylic, polyester, or urethane, or an aqueous polymer such as PVA, alginic acid, or lignin sulfonic acid should be added to the ink. You can also. In addition, a water-soluble high-boiling solvent such as ethylene glycol or glycerin can be added for the purpose of preventing the inkjet head from drying.
In this way, the ink can be adjusted so that a dye, a charge control agent, an aqueous polymer, or the like can function as an aggregating agent.

  The agglomeration reaction is carried out by adding an organic acid as the aggregating agent B to the anionic surfactant that is dispersed and stabilized by ion dissociation in a state adjusted to neutral or alkaline in the ink. As the degree decreases, the dispersion becomes unstable and agglomerates. Along with this, the aqueous polymers contained in the inks A and C aggregate to cause an increase in viscosity according to the concentration of the flocculant B.

In addition, when inks A and C in which the aggregating agent is composed of an anionic surfactant or an anionic aqueous polymer are subjected to an agglomeration reaction using an aggregating agent B made of a cationic polymer, an anionic component in the inks A and C And the cationic group of the cationic polymer contained in the flocculant B react to cause aggregation. This aggregation reaction is more likely to occur as the cation group density is higher, and corresponds to the rate of the aggregation reaction.
Further, the coagulant B can also adjust the coagulation ability by selecting the type of functional group that contributes to coagulation or by controlling the pH at which the coagulant acts. For example, by increasing the degree of polymerization of the cationic polymer, the moving speed in water can be lowered, and thereby the aggregation speed can be lowered even if the density of the cationic groups is the same.
As the anionic surfactant and the anionic aqueous polymer, those containing a group that becomes an anion when dissociated in water are used. For example, those having a carboxylic acid, sulfonic acid, or phosphoric acid structure are used. Specifically, fatty acid salts and cholates are used as carboxylic acid-based charge control agents, and linear alkylbenzene sulfonate sodium, lauryl sulfate, monoalkyl sulfate, or alkylpolyoxyethylene as sulfonic acid-based charge control agents. A monoalkyl phosphate or the like can be used as a charge control agent having a phosphate structure. On the other hand, as the acid used for the flocculant B, an organic acid such as malonic acid, citric acid or acetic acid, or an inorganic acid such as dilute hydrochloric acid can be used.

Next, a printing method performed by the printing apparatus will be described.
First, as shown in FIG. 1, the printed material P to which the decorative member M is attached is moved in a certain direction. Here, it is assumed that the printing material P includes polyester fibers and includes regions having different fiber densities.
At the timing when the printing material P is moved and reaches directly below the first ink supply device 1, ink A is ejected from the first ink supply device 1 toward the printing material P by the ink jet method. At this time, as shown in FIG. 4A, the first ink supply device 1 has only the peripheral portion S located in the periphery of the attachment region R of the printing material P to which the decorative member M is attached. Ink A is ejected onto the ink.
The ink A that has landed only on the peripheral portion S of the printing material P penetrates in the thickness direction and the surface direction of the printing material P, and then from the peripheral portion S to the attachment region R as shown in FIG. The attachment region R and the peripheral portion S of the printing material P are filled with the ink A.
In this way, the decorative member M is attached to the attachment region R of the substrate P by supplying the ink A around the attachment region R of the substrate P before the flocculant B is supplied. Ink can be supplied.
The ink A that is ejected onto the peripheral portion S is preferably landed at a position close to the attachment region R.
For example, in the case where the decorative member M is a button, a hook, or the like having several mm, the ink A penetrates and moves to the attachment region R by a distance of several mm from the peripheral portion S. Further, when the decorative member M is in the form of a wire such as a fastener, the attachment region R can be colored with a penetration distance of about the thickness of the wire.

Next, as shown in FIG. 4C, the flocculant is supplied at the timing when the printing material P supplied with the ink A reaches directly below the flocculant supply device 2 from just below the first ink supply device 1. The flocculant B is supplied from the apparatus 2 toward the substrate P. The flocculant B is supplied to the entire printing material P and penetrates into the region other than the attachment region R of the printing material P and also penetrates into the attachment region R. The flocculant B that has permeated the attachment region R agglomerates with the ink A that has previously permeated the attachment region R to increase the viscosity of the ink A. The ink that has reached the attachment region R is retained in the attachment region R until it is fixed to the printing material P in the fixing device 4.
In this way, by increasing the viscosity of the ink A that has penetrated into the attachment region R by the aggregation reaction with the flocculant B, it is possible to suppress the occurrence of uneven printing due to the ink A moving to a region other than the attachment region R. Can do.

Subsequently, the printing material P to which the flocculant B is supplied reaches the printing material P from the second ink supply device 3 at a timing when the printing material P arrives from directly below the flocculant supply device 2 to directly below the second ink supply device 3. Ink C is ejected by an ink jet method. At this time, the second ink supply device 3 ejects ink C onto a region other than the attachment region R of the printing material P as shown in FIG.
The ink C ejected from the second ink supply device 3 permeates the inside of the yarn Y constituting the printing material P while coagulating with the aggregating agent B, and reaches a predetermined distance when permeated by the thickness distance of the yarn Y. The viscosity is increased to Usually, the ink that has penetrated into the yarn Y of the printing material P including the regions having different fiber densities has capillary force that works from the surrounding regions where the fiber density is high. It moves beyond the weaving pitch in the surface direction of the printing material P on which the capillary force acts, resulting in printing unevenness depending on the weaving. In this embodiment, since the supply amount of the flocculant B is set so as to increase the ink C uniformly permeated by the thickness distance of the yarn Y to a predetermined viscosity, the ink C permeated into the printing material P is set. Until the ink is fixed by the fixing device 4, the ink C can be kept within the thickness distance of the yarn Y. As a result, it is possible to uniformly print the region other than the attachment region R of the printing material P to the inside of the yarn in the thickness direction.
The ink C takes into account the coloring amount of the ink A with respect to a portion where the ink A supplied by the first ink supply device 1 exists in a region other than the attachment region R, such as the peripheral portion S of the substrate P. It is preferable to perform printing. That is, in a region other than the attachment region R of the printing material P, the ink C is supplied so that the portion where both the ink A and the ink C penetrate has the same color as the portion where only the ink C penetrates. Is preferred.

The printing material P is moved from the second ink supply device 3 to the fixing device 4 in a state where the ink A is retained in the attachment region R and the ink C is retained in a region other than the attachment region R, and the drying device 5. It is dried by. In general, the difference in the partial drying speed in this drying step promotes the movement caused by the capillary force difference of the ink that has permeated the printing material P and causes printing unevenness. Further, since the movement of the ink C is suppressed, it is possible to suppress the occurrence of uneven printing. Subsequently, the printing material P is subjected to a heating coloring process by the coloring processing device 6, for example, when the printing material is a polyester cloth and a disperse dye ink is used and is placed at a temperature of 160 to 200 ° C. for several minutes to several tens of minutes. The disperse dye attached to the fiber surface inside the yarn is sublimated and taken into the fiber. Thereafter, the printed material P is washed with an unreacted material under the alkaline reduction condition by the cleaning / drying apparatus 7 and dried, and the dyeing of the printed material P is completed.
The fixing device 4 can be changed according to the printing material P and the type of ink. For example, when an acid dye or a reactive dye is used, the printing material P is dried and then subjected to a high-temperature steam treatment. By causing the binding reaction between the dye and the fiber to occur, and the printed material P that has undergone the binding reaction is washed and dried, the printed material P can be dyed.

  According to the present embodiment, since the ink A is supplied to the periphery of the attachment region R of the printing material P before the flocculant B is supplied, the attachment is performed with the decorative member attached to the printing material P. Ink can be supplied into the region R. In addition, since the ink C is retained in the thickness direction in the region other than the attachment region R of the printed material P, the region other than the attachment region R of the printed material P is uniformly dyed. Can do.

In the above-described embodiment, the flocculant supply device 2 supplies the flocculant B to the entire printed material P by the dipping method. However, the flocculant B is applied to a region other than the attachment region R of the printed material P. If it can supply, it will not restrict to this, For example, the coagulant | flocculant B can also be supplied to areas other than the attachment area | region R of the to-be-printed material P using an air spray method, a roll coater, an inkjet method etc., for example. Further, the flocculant B supplied to the area other than the attachment area R of the printing material P may permeate into the attachment area R from the area, and the flocculant B that has penetrated into the attachment area R is attached first. The viscosity of the ink A that has penetrated into the region R can be increased, and the moving speed can be decreased.
Further, the flocculant supply device 2 can also supply the flocculant B to the printing material P from the back side of the printing material P.

In the above embodiment, the first ink supply device 1 ejects ink A from the front side of the printing material P, but the attachment region R of the printing material P from the back side of the printing material P. Ink A can also be ejected onto the surface.
Further, in the above embodiment, the second ink supply device 3 ejects ink C from the front side of the printing material P, but from the back side of the printing material P or the printing material P. The ink C can be ejected from both the front side and the back side to a region other than the attachment region R of the printing material P. Further, in the above embodiment, the second ink supply device 3 ejects the ink C to an area other than the attachment area R of the printing material P, but supplies the ink C to the entire printing material P. You can also
Further, when the flocculant B is supplied as fine droplets by the air spray method and is supplied up to the surface of the decorative member M, printing is performed on the surface of the decorative member M by printing of the ink C by the second ink supply device 3. You can also

In addition, as an organic cationic polymer as an aggregating agent, a compound having an amino group (—NH ₂ ) such as ammonia or alkylamine, and a guanidino group or biguanide group such as arginine, guanidine, or biguanide derivative having more nitrogen. Compounds can be used. As the polymer having an amino group or imino group in the side chain or the main chain, synthetic polymers such as polyethyleneimine, polyvinylamine and polyallylamine, and aqueous polymers containing polyamino acids such as polyornithine and polylysine can be used.
N, N-dimethylaminoethyl acrylate copolymer obtained by copolymerizing acrylamide and N, N-dimethylaminoethyl methacrylate or N, N-dimethylaminoethyl acrylate monomer, polyvinylamidine polymer, amphoteric polymer, etc. Available.

In the above embodiment, the aggregation reaction is performed using the anionically charged ink and the cationically charged aggregating agent. However, the cationically charged ink and the anionically charged aggregation are used. Aggregation reaction can also be performed using an agent.
As an anionic flocculant, for example, a water-soluble or water-dispersible polymer having a carboxylic acid, sulfonic acid or phosphoric acid structure as a hydrophilic group can be used. Specifically, animal and vegetable oils and fats, soda salts such as alkylbenzene sulfonic acids and alkylnaphthalene sulfonic acids, potassium salts and the like can be used. The cationic ink includes a cationic colorant such as an alkaline dye and a cationic charge control agent. As the cationic charge control agent, one that becomes a cation when dissociated in water is used, for example, one having tetraalkylammonium as a hydrophilic group. Specifically, alkyltrimethylammonium salt, dialkyldimethylammonium salt, alkylbenzyldimethylammonium salt, or the like can be used.

Embodiment 2
FIG. 5 shows a partial configuration of a printing apparatus that performs the printing method according to the second embodiment. In this printing apparatus, the ink A supplied from the first ink supply apparatus 1 performs a penetration promoting process for promoting the penetration of the printing material P into the attachment region R. The first embodiment shown in FIG. In this printing apparatus, a permeate supply device 21 for supplying a permeate containing no coloring material is newly provided between the first ink supply device 1 and the flocculant supply device 2.

  First, in the same manner as in the first embodiment, ink A is ejected from the first ink supply device 1 toward the printing material P by the inkjet method on the printing material P that moves in a certain direction. At this time, as shown in FIG. 6A, the first ink supply device 1 performs ink A droplet ejection only on the peripheral portion S of the printing material P to which the printing material M is attached.

Subsequently, the printing material P to which the ink A is supplied reaches from directly below the first ink supply device 1 to just below the penetrant supply device 21, and the ink A is printed as shown in FIG. 6B. Before the material P moves in the surface direction, the penetrating liquid D containing no coloring material is supplied from the penetrating liquid supply device 21 to the outside of the landing position of the ink A with respect to the attachment region R of the printed material P. As part of the penetrating liquid D supplied to the printing medium P penetrates in the surface direction of the printing medium P, the ink A located between the landing position of the penetrating liquid D and the attachment region R is forcibly forced. To be pushed into the attachment region R.
In this way, the ink A permeates into regions other than the attachment region R by directing the permeation direction of the ink A toward the attachment region R by utilizing the penetration of a part of the penetrating liquid D in the direction of the attachment region R. And the occurrence of uneven printing can be suppressed. In this way, the ink A is promoted to penetrate in the direction of the attachment region R, and the attachment region R is filled with the ink A.
In addition, although the example which supplies the penetrating liquid D after the printing of the ink A was shown, the penetrating liquid D is printed on the attachment area before the printing of the ink A, and the penetration of the ink A can also be performed by penetrating the attachment area. It can be promoted.
Such penetration promotion by the penetrating liquid D is particularly effective in a light-colored region where the ink printing amount is small.

As shown in FIG. 6 (C), the printing material P to which the penetrating liquid D is supplied arrives at the timing immediately below the penetrating liquid supply device 21 and directly below the flocculant supply device 2. The flocculant B is supplied toward the printed matter P. The flocculant B is supplied to the entire printing material P, and the flocculant B that has penetrated into the attachment region R causes an aggregation reaction with the ink A, thereby increasing the viscosity of the ink A that has penetrated to fill the attachment region R. Ink A remains in that area.
In this way, by increasing the viscosity of the ink A that has permeated into the attachment region R, the ink A is collected in the attachment region R by the permeation promotion process until the ink A is fixed on the printing material P by the fixing device 4. Ink A can be prevented from moving to other areas.

On the other hand, the flocculant B that has permeated the region other than the attachment region R is ejected from the second ink supply device 3 to the region other than the attachment region R of the printing material P in the same manner as in the first embodiment. Aggregation reaction with C. Here, the flocculant B is supplied so that the ink C rises to a predetermined viscosity when the ink C penetrates by the thickness distance of the yarn Y, and the ink C is applied to the printing material P by the fixing device 4. Until fixing, the yarn Y is kept within the thickness distance range. Then, the printing material P is moved from the second ink supply device 3 to the fixing device 4, and the ink A and the ink C are fixed to the printing material P in the fixing device 4 and the dyeing is completed.
According to the present embodiment, the ink A is promoted to permeate in the direction of the attachment region R by ejecting the penetrating liquid D, so that the penetration of the ink A into regions other than the attachment region R is suppressed, It is possible to suppress printing unevenness.

  The penetrating liquid D supplied from the penetrating liquid supply device 21 is a liquid that does not contain a color material and is only required to promote the permeation of the ink A toward the attachment region R. For example, when the ink A is a water-based ink, A surfactant added with a surfactant or the like can be used.

In the above-described embodiment, the penetrating liquid D is supplied to the printing material P to promote the penetration of the ink A supplied from the first ink supply device 1 into the attachment region R. For example, the penetration promoting process can be performed by exposing the attachment region R of the substrate P to a steam environment. By exposing the attachment region R to a steam environment by applying high-temperature steam (for example, water vapor having a boiling point of 100 ° C. or more supplied from a steam generator having a boiling point of 100 ° C. or more by adding sodium chloride or the like) to the attachment region R Further, it is possible to suppress the ink A penetrating in the direction of the attachment region R from being dried and lowering the moving speed, and to promote the penetration of the ink A into the attachment region R.
Further, by supplying the liquid mist to the attachment region R of the printing material P, drying of the ink A that permeates in the direction of the attachment region R can be suppressed, and the penetration of the ink A into the attachment region R can be promoted.

Embodiment 3
FIG. 7 shows a partial configuration of a printing apparatus that performs the printing method according to the third embodiment. This printing apparatus newly includes a flocculant supply device 31 for supplying a flocculant E between the second ink supply device 3 and the fixing device 4 in the printing apparatus according to the first embodiment shown in FIG. It is.
Here, the aggregating agent E causes the agglomeration reaction with the aggregating agents contained in the ink A and the ink C to completely stop the movement of the ink A and the ink C in the printed material P. For example, the aggregating agent contained in the ink A and the ink C causes an aggregating reaction with the aggregating agent B and the aggregating agent E, whereby the aggregating agent B and the aggregating agent E are supplied so that the charge of the aggregating agent exceeds the isoelectric point. The total amount is set, and the supply amount of the flocculant E can be set to a value equal to or larger than the amount obtained by subtracting the supply amount of the flocculant B from the total supply amount.

In the same manner as in the first embodiment, the viscosity of the ink A supplied to the substrate P is increased in the attachment region R by the aggregation reaction with the flocculant B, and the ink C is caused by the aggregation reaction with the flocculant B. In a region other than the attachment region R, when it penetrates by the thickness distance of the yarn Y, it is increased to a predetermined viscosity. Then, when the flocculant E is supplied to the entire print substrate P by the flocculant supply device 31, the movement of the ink A is completely fixed in the attachment region R of the print substrate P and the portions other than the attachment region R are fixed. The movement of the ink C is completely fixed in the region.
As a result, the ink A and the ink C whose movement speed is suppressed in the printing medium P are not moved to the other areas, and the ink A and the ink B are printed on the printing medium P in order to completely fix the movement. Unevenness can be suppressed. In addition, when the fixing device 6 fixes the ink A and the ink C onto the printing material P, it is possible to suppress the occurrence of uneven printing due to the movement of the ink.

Embodiment 4
As shown in FIG. 8, the printing apparatus used in the printing method according to the fourth embodiment automates the respective supplies by calculating the supply amounts of ink A, coagulant B, and ink C based on the input data. At the same time, by feeding back the result printed on the substrate P, the respective supply amounts can be corrected in sequence.
Further, by switching the supply amount or type of the flocculant B, it is possible to control the ink penetration position into the printing material P. Furthermore, by performing printing and color processing, etc., and measuring the optical characteristics of the printed material P that has been dyed on both front and back sides, the ink penetration position into the printed material P is measured and the result is fed back. Is also possible.

  The printing apparatus used in the present embodiment includes a supply amount calculation unit 41, a control unit 42, and a print driving unit 43 that are sequentially connected. The printing driving unit 43 is the same as that of the printing apparatus used in the first embodiment. The first ink supply device 1, the flocculant supply device 2, and the second ink supply device 3 are connected. The first ink supply device 1a is disposed on the back side of the printing material P so as to face the first ink supply device 1 and the second ink supply device faces the second ink supply device 3. 3a can also be arranged. In addition, the printing apparatus arranges measuring devices 44a and 44b on the front side and the back side, respectively, on the downstream side of the fixing device 2 with respect to the moving direction of the printing material P, and inputs print result measurement values to the measuring devices 44a and 44b. The printing result measurement value input unit 45 is connected to the supply amount calculation unit 41 while the unit 45 is connected.

  First, information regarding the supply amounts of ink A, coagulant B, and ink C is input to the supply amount calculation unit 41 by the operator as input data. As information relating to the supply amounts of ink A and ink C, information on the print image (color for each pixel, etc.), information on the printing material P (material, thickness, thickness of thread, etc.), and the like are input. In addition, as information on the flocculant B, information on the printing material P, ink information (type, concentration, isoelectric point of the flocculant, etc.) and the like are input.

The supply amount calculation unit 41 calculates the supply amounts of the ink A, the coagulant B, and the ink C based on the input information, and inputs them to the control unit 42. When the control unit 42 outputs the supply amounts of the ink A, the coagulant B, and the ink C to the print drive unit 43 at appropriate points in time, the print drive unit 43 outputs a drive signal corresponding to each supply amount to the first drive signal. The ink is supplied to the ink supply devices 1 and 1a, the flocculant supply device 2, and the second ink supply devices 3 and 3a, respectively, and the ink A, the flocculant B, and the ink C are sequentially supplied to the printing material P. The first ink supply device 1a and the second ink supply device 3a arranged on the back side of the printing material P are, for example, different colors of ink from the first ink supply device 1 and the second ink supply device 3, respectively. Can be used, for example, and the printed material P can be dyed in different colors on the front surface and the back surface. Subsequently, the ink fixed to the printing material P is fixed to the printing material P by the fixing device 2, whereby the printing on the printing material P is completed.
Optical characteristics of the printed material P after printing are measured by measuring devices 44a and 44b including optical sensors, and the measured values are input to the printed result measurement value input unit 45, thereby printing on the printed material P. Is fed back. The supply amount calculation unit 41 corrects the supply amounts of the ink A, the coagulant B, and the ink C so as to realize the target color development based on the measurement value input from the print result measurement value input unit 45, and performs correction. The print drive unit 43 drives the first ink supply devices 1 and 1a, the flocculant supply device 2, and the second ink supply devices 3 and 3a, respectively, in accordance with the supplied amounts, respectively. Printing is performed.

  According to the present embodiment, it is possible to automatically supply appropriate amounts to the printing material P by inputting information relating to the supply amounts of the ink A, the flocculant B, and the ink C, respectively. In addition, since the result of printing on the printing material P is fed back and printing is performed again on the printing material P based on the corrected supply amounts of the ink A, the flocculant B, and the ink C, the initial supply amount is poor, or Even when the physical properties of the ink and the printing material P change, the variation in color can be effectively suppressed.

  DESCRIPTION OF SYMBOLS 1,1a 1st ink supply apparatus, 2,31 Flocculant supply apparatus, 3,3a 2nd ink supply apparatus, 4 fixing apparatus, 5 drying apparatus, 6 color development apparatus, 7 washing | cleaning apparatus, 21 osmotic solution supply apparatus , 41 Supply amount calculation unit, 42 Control unit, 43 Print drive unit, 44a, 44b Measuring device, 45 Print result measurement value input unit, Y thread, F fiber, A, C ink, B, E flocculant, D permeation liquid , M decorative member, R mounting area, S peripheral portion, P substrate.

Claims (11)

A method of printing by an ink jet method on an object to be printed on which an ink cannot be directly landed on an attachment region of the decorative member due to the decorative member partially attached on the surface,
The first ink printing causes ink to land only on the periphery of the attachment area of the substrate to be infiltrated into the attachment area,
Supplying a coagulant that reacts with the ink to at least a region other than the attachment region of the substrate;
A printing method, wherein ink is ejected onto a region other than the attachment region of the substrate to be printed by the second ink printing to react with the aggregating agent.   2. The flocculant is supplied after performing a penetration promoting process for promoting penetration of the ink supplied by the first ink printing into the attachment region after the first ink printing. The printing method described.   The printing method according to claim 2, wherein the penetration promoting process is performed by supplying a penetrating liquid that does not contain a color material to the outside of the ink landing position.   The printing method according to claim 2, wherein the penetration promoting process is performed by exposing the attachment region to a steam environment.   The printing method according to claim 2, wherein the penetration promotion process is performed by supplying liquid mist to the attachment region.   The supply amount of the flocculant is set so that the viscosity increases when the ink supplied by the second ink printing penetrates the thread constituting the print object by a predetermined distance. The printing method according to claim 1.   After droplets are ejected by the second ink printing toward the printing material, the flocculant is further supplied to the printing material, whereby the printing material is printed by the first ink printing and the second ink printing. The printing method according to claim 1, wherein the ink supplied inside is fixed.   The ink ejected by the first ink printing and the second ink printing is charged anionicly and the flocculant is charged cationically. Printing method.   The ink ejected by the first ink printing and the second ink printing is charged cationically, and the flocculant is charged anionic. Printing method. The decorative member is made of a resin material or a metal material,
The printing method according to any one of claims 1 to 9, wherein the printing object includes a woven or knitted yarn made of a plurality of fibers, and has regions where the crossing frequencies of the yarns are different.   The printing method according to claim 1, wherein the decorative member is a fastener coupling member.