JPH0742085A - Ink jet dyeing method of yarn - Google Patents

Abstract

PURPOSE:To provide a microfine dyeing method capable of intentionally applying a prescribed coloring to a yarn at a prescribed part required for a, design so as to make a pattern or a design in a fabric according to a delicate and senseful plan. CONSTITUTION:This dyeing method is carried out-by allowing heads (T) and (t) each equipped with plural ink jet injection nozzles to surround a continuously running yarn (Y), injecting ink jet through the injection nozzles toward the yarn and printing on the yarn therewith. A designed and microfinely delicate pattern and color can be applied to the yarn in the unit of one yarn. Since a prescribed coloring is intentionally applied to the yarn at a prescribed part, a pattern and color rich in delicacy matched with the sense can be formed on a fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention, in order to fabricate a fabric capable of expressing a new sensibility, performs regular coloring as designed with a predetermined hue required at a predetermined position required by a thread in a microscopic thread unit. The present invention relates to an inkjet dyeing method that can be applied.

[0002]

2. Description of the Related Art In recent years, there has been an increasing tendency to express individuality as much as possible, from young to old, regardless of age. In the textile industry, however, new clothing materials are being developed one after another in order to respond to such unique claims, and as a result, materials with new sensibilities as well as functionality have recently been developed to express unique personalities. Has appeared on the market. Specific examples of this include the development and practical application of new raw yarns such as various types of composite fibers, special pattern development by the advancement of knitting and weaving technology, expression of texture, and dyeing finish processing including textile printing for finishing as final clothing materials. The sophistication of technology can be improved. Above all, the dyeing and finishing technology is extremely important for expressing sensibilities because it affects the patterns and colors and directly appeals to the eyes. And
Finer dyeing is necessary to impart various patterns and colors to express sensitivity more sensitively.

In that sense, a so-called space dyeing dyeing method (see, for example, Japanese Utility Model Publication No. 4-10227) has been developed. Since this is a method of dyeing on a yarn-by-thread basis, relatively fine dyeing is possible, and it is a tentatively effective means of providing a fabric having a pattern and color different from those of the post-dyed product.

The space dicing is performed by partially dyeing (1) Kasse thread-like (2) Warp-like (3) Knit-like (4) Cheese-like as it is, and once dyed and unraveled to the thread stage, It is a technique that pays attention to the state that it is colored randomly in the length direction. When knitting or woven fabric is made by using the yarn by this space dicing, the colored part and the uncolored part, or each part colored differently, becomes a cross structure while intricately intermingling with each other. It has a marbled pattern and colors, and produces a special visual effect. The place where this unexpected pattern and color is created is the fun of using threads by space diing.

However, the knitted fabrics and woven fabrics obtained by using the yarns obtained by this dyeing method have unexpected patterns and colors, but this is only a result of chance. Absent. This is because the yarn itself used for the fabric is due to space dicing and cannot be said to be a dyed yarn that is extremely finely and accurately colored so as to sufficiently match the unit of the knitting or woven fabric structure. . Therefore, in order to respond to the assertion of new personality as described above, we designed the design of the fabric, colors, etc. from the beginning, designed dyeing in units of threads to accurately express this, and planned as planned. I couldn't do anything like that.

This is a big drawback from the viewpoint of planning a design. In other words, design and plan the pattern and color of the fabric as a new kind of clothing material,
Based on this, a dyeing technique for regularly coloring a predetermined hue required at a predetermined position required by a yarn as designed has not yet existed. The yarn dyeing method, which is necessary to express new sensibilities systematically, is impossible with the conventional technology such as space dicing as it has been so far, and it is still possible to express the new sensibility that the market is seeking. The reality is that there is no satisfactory dyeing technique.

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems and is extremely epoch-making. That is, the object of the present invention is to impart a sensitive and delicate pattern and pattern to the fabric as planned, so that it is possible to give a predetermined coloring to the yarn in a predetermined place designed in a planned manner. A dyeing method is provided.

[0008]

Means for Solving the Problems As a result of earnest research, the inventors of the present invention have provided a jet nozzle corresponding to each running yarn unit, and when the arrangement is arranged in a certain array, the yarn microscopic It has been found that dyeing is possible. Depending on the material, thickness, and shape of the yarn, it is more reliable to dye the yarn by making the yarn into a flat shape, a so-called oval shape or a shape similar to this immediately before inkjet printing, and then immediately performing inkjet printing. It was also found to be effective as a result. The inventors have completed the present invention based on such knowledge.

That is, the present invention resides in an ink jet dyeing method in which a continuously traveling yarn is surrounded by a head having a plurality of ink jet ejection nozzles, and ink jet printing is performed from the ejection nozzles toward the yarn. The present invention also relates to an inkjet dyeing method in which the yarn is surrounded by a head having a plurality of inkjet jet nozzles at a plurality of locations along the direction of continuous yarn travel, and inkjet printing is performed from the jet nozzles toward the yarn.

In addition, there is an ink jet dyeing method in which the phases of the heads are different. And, it also exists in an ink jet dyeing method in which a running shape imparting step is provided in advance for the running yarn. Further, the flattened shape imparting step lies in the inkjet dyeing method by pressing force using a roller.

A feature of the present invention is a dyeing capable of giving extremely fine and accurate coloring that can sufficiently match the unit of the structure of the knitted or woven fabric, the essence of which is the direct yarn unit and the predetermined yarn required. Is a microscopic dyeing for coloring a predetermined hue required in the place as designed, and the term "as designed" is a coloring design for a yarn to obtain a planned fabric pattern and color. The yarn is dyed specifically by ejecting the dye ink from each ejection nozzle of the head, and the ejection control of the dye ink from each ejection nozzle of the head is controlled by the memory unit of the computer. This is performed based on the dyeing information that is input in advance and is as designed for the yarn.

In the woven fabric, since the positional relationship between the warp yarns and the weft yarns is defined, the arrangement state of the yarns can be read in advance, so that the weave structure and the color arrangement can be grasped systematically and quantitatively. When the yarn dyed as designed based on the fabric is woven into a fabric, it is possible to impart a unique pattern and color as planned, which has never been obtained as a woven fabric. Similarly, in knitting, the positional relationship such as the wale of threads is defined for both warp knitting and weft knitting, so the knitting structure and color arrangement can be grasped systematically and quantitatively. When the dyed yarn is knitted into a fabric, a unique pattern and color as planned, which has never been obtained as a knit, can be obtained.

Another feature of the present invention is that a flat shape imparting step for deforming the yarn into a flat shape is newly added in order to further enhance the dyeing effect on the yarn. The reason for this is as follows.Thick count yarns used for weft knitting, twin yarns made by twisting yarns, and special yarns such as slab yarns and nep yarns, the dye ink is dyed only on the surface layer, Dyeing is not decided vividly. This is because the spraying force of the dye ink on the yarn is not sufficient, but the jetting force of the jetting nozzle naturally causes the equipment surface,
There is a physical limit in terms of the impact on quality and productivity, and of course the spraying power also has a limit. Therefore, in the present invention, by making the yarn flat, the distance from the surface of the yarn to the central portion is shortened, and there is no great difference in the amount of dye ink applied between the directly printed surface and the central portion. I did so.

In the flat shape giving step, the flat shape is given by applying pressure to the yarn, but since the optimum pressure varies depending on the material, thickness, shape, etc. of the yarn, the pressure in the flat shape giving step can be adjusted. By doing so, it can be adapted to any thread. The yarn referred to in the present invention means a filament aggregate in which one to several hundreds are bundled, and the yarn is treated with a twisted yarn, or
A filament yarn treated with a textured yarn, a spun yarn composed of staples, a staple aggregated yarn obtained by bundling these yarns, a yarn obtained by mixing the above filaments and staples, and the like. Inkjet printing means that a yarn is dyed in a predetermined hue by ejecting a dye ink onto the yarn.

[0015]

[Action]

The yarn is sent to the inkjet printing process Z by a feed roller (when the flattening process is not provided). First, in the first inkjet ejection step Z1, dye ink is ejected from the ejection nozzles of the head, and coloring is performed for each ejection nozzle as designed in a region in which the peripheral surface of the yarn is divided.

Next, the yarn which has finished the first ink jet jetting process Z1 is sent to the second ink jet jetting process Z2. Also in the second inkjet ejection step Z2, the dye ink is ejected from the ejection nozzle of the head,
In the area where the peripheral surface of the yarn is divided, coloring for each nozzle is performed as designed and dyed.

(When having the flattening step) First, the yarn discharged from the feed roller is first subjected to the flattening step Z.
Sent to 0. Here, the yarn is deformed into a flat shape by receiving a strong pressing force by the flattening roller. The yarn exiting the flat shape imparting step Z0 is then subjected to the inkjet printing step Z
Will be sent to. First, the first inkjet jet process Z
In No. 1, the dye ink is ejected from the ejection nozzle of the head, and coloring is performed as designed for each nozzle in the area where the peripheral surface of the yarn is divided and dyed.

Next, the yarn which has finished the first ink jet jetting process Z1 is sent to the second ink jet jetting process Z2. Also in the second inkjet ejection step Z2, the dye ink is ejected from the ejection nozzles of the head, and the coloring of each nozzle is performed as designed and dyed in the area dividing the peripheral surface of the yarn.

[0019]

Embodiments of the present invention will be further described with reference to the drawings. FIG. 1 is a diagram schematically showing a first embodiment of the present invention. The feed rollers Q1 and Q2 are for feeding the yarn pretreated for inkjet dyeing forward to the inkjet printing process Z. The inkjet printing process Z is composed of two inkjet injection processes Z1 and Z2 along the traveling direction of the yarn.

First, a first ink jet jetting step Z1 is prepared, and the yarn Y sent out in this step is subjected to the first printing. In the first jetting process Z1, a first head T is vertically placed so as to surround the yarn, and a plurality of inkjet jet nozzles are provided inside the head. Are arranged at an angle of θ with respect to each other. In this way, the ejection nozzles NZ1, NZ2, NZ3, which are each arranged at an arrangement angle θ perpendicular to the yarn, are arranged.

The head has a supply circuit for supplying dye ink to an ejection nozzle (not shown) and an electromagnetic valve (for example, a piezo element or the like) for forcibly ejecting the dye ink from the ejection nozzle. Is equipped with
The solenoid valve is controlled by a command from the output section of the computer.

Once the head is selected, the number of jet nozzles and the arrangement angle θ are determined, so that the head should be selected in consideration of the coloring condition for which the yarn is designed.
Dye ink is ejected from the ejection nozzle toward the yarn,
The thread is printed in the color as designed in the area dividing the circumference.

The jetting control of the dye ink from each jetting nozzle is controlled by the thread coloring conditions designed in the memory part of the computer (for example, jetting time, selection of jetting nozzles to be opened and closed, etc.).
Is input and stored in advance, and is performed based on this stored information. The ejection control of the dye ink from each ejection nozzle by the computer is not essential to the present invention and will not be described in detail.

Now, the three injection nozzles NZ1, NZ2, N
By continuously ejecting different dye inks by Z3, it is possible to obtain a portion A colored in three colors in a region where the periphery of the yarn is divided in the axial direction of the yarn (FIG. 6).

Here, the jet nozzle NZ1 and the jet nozzle NZ
When 3 is closed and only the jet nozzle NZ2 is opened and the dye ink is continuously jetted, a portion B colored in one color can be obtained in a region where the periphery of the yarn is divided in the axial direction of the yarn (Fig. 7).

On the other hand, since the normal yarn is running at a constant speed, it is possible to form a colored partial region of a certain distance in the yarn direction by selecting the jetting time. For example, when different dye inks are intermittently ejected by the three ejection nozzles NZ1, NZ2, NZ3, the periphery of the yarn is divided into the region divided in the axial direction of the yarn and the direction perpendicular to the axial direction of the yarn. In the region, it is possible to obtain a portion C in which each of the three colors is intermittently colored with a constant length (FIG. 8).

Further, the jet nozzle NZ1 and the jet nozzle NZ
3 is closed, and only the jet nozzle NZ2 is opened to intermittently jet the dye ink, and a portion D in which one color is intermittently colored with a constant length is provided in a region divided in the axial direction of the yarn. Can be done (Fig. 9).

In this case, when the injection is intermittently performed, the injection time is taken differently,
For example, it is also possible to make a one-dot broken line-shaped portion E of one color in a region divided in the axial direction of the yarn (FIG. 10).

As described above, since the number of jet nozzles of the head and the arrangement angle of the nozzles are determined by the head, it is possible to give a degree of freedom to the partial colored region by selecting the head. Further, although the number of ejection nozzles that can be provided in the head is physically limited as a matter of course, as the number of ejection nozzles increases, a more colored partial colored region can be obtained. By increasing the arrangement angle θ of the three ejection nozzles of the head, it is possible to increase the distance between the colored portions in the region divided in the axial direction of the yarn, and conversely, the arrangement angle of the three ejection nozzles of the head. By reducing θ, it is possible to further reduce the interval between the colored portions in the region divided in the axial direction of the yarn. However, it will be described later that the arrangement angle has a limit.

The yarn that has undergone the first ink jet jetting process Z1 advances in the direction of the arrow and is then sent to the second ink jet jetting process Z2 located behind it. In the second inkjet jetting process, the second head t is vertically arranged so as to surround the yarn as in the first inkjet jetting process. The head has three ejection nozzles nz1,
Similar to the first head, nz2 and nz3 are provided, and these jet nozzles are arranged perpendicularly to the yarn at an arrangement angle θ.

Dye ink is ejected from the ejection nozzles nz1, nz2, nz3 of the head toward the yarn to the traveling yarn, and the ejected dye ink is in a region in which the periphery of the yarn is regularly divided. Is printed in the color as designed.

In the first embodiment, the ejection nozzles nz1 and nz of the head t in the second ink jet ejection process are used.
2 and nz3 are arranged in the same phase as the ejection nozzles NZ1, NZ2, NZ3 of the head T in the first inkjet ejection process, the first ejection nozzles NZ1, N
The second injection nozzle n is again applied to the area colored with Z2 and NZ3.
Different colors can be overlapped and colored with z1, nz2, and nz3, and a mixed color of both colors can be given. By adding the third jetting process in addition to the second jetting process, the number of heads becomes three, and a mixed color of three colors can be applied.
It will be appreciated that more colors can be selected by increasing the jetting process.

The dyed yarn which has been subjected to the ink jet printing step Z is sent to a heat fixing step by steaming, which is a post-treatment usually performed after ink jet printing, to be heat fixed, and then washed.

FIG. 2 is a diagram schematically showing a second embodiment of the present invention. The difference from the first embodiment is that, in the case of the present embodiment, as can be seen from FIG. 3, the head t in the second inkjet ejection process Z2 is different from the head t in the first inkjet ejection process Z1. , The phase is shifted by α °. FIG. 3 shows the misalignment of the two heads viewed from the yarn direction. By arranging the heads in this way, the ejection nozzles nz1, nz2, nz3 of the head in the second ejection step are arranged in a different phase from the ejection nozzles NZ1, NZ2, NZ3, and the periphery of the yarn is surrounded. It is possible to print in more colors in a more finely divided area.

For example, the first ink jet jetting step Z
The second inkjet ejection process Z for the head T of No. 1
When the two heads t are arranged with a phase difference of α = 1/2 · θ, the phases of the ejection nozzles nz1, nz2, nz3 and the ejection nozzles NZ1, NZ2, NZ3 are also displaced by the same phase difference, and in the end, All injection nozzles nz1, nz2, nz3, NZ1, NZ2, NZ3 at an arrangement angle of 1 / 2.theta.
Will be placed. Therefore, if different colors are ejected from the respective ejection nozzles, it is possible to obtain a total of 6 color shades in the region where the periphery of the yarn is divided in the axial direction of the yarn.

By the way, the arrangement angle θ of the jet nozzles in the head is apt to cause so-called jet deviation when dyeing a relatively thin yarn (for example, 60th yarn or more). For example, when the total θ exceeds 180 °. In other words, it has been known that the jet nozzles will face each other and the jet nozzles will be clogged. Therefore, the total of θ is 18
Since it is necessary to keep it at 0 ° or less, preferably 150 ° or less by taking a safety factor, it is impossible to color the surface of more than half of the yarn with one head at a time.

However, as in the second embodiment, by ejecting the head t of the second ink jet ejecting step Z2 with respect to the head T of the first ink jet ejecting step Z1, the ejection is performed. Since the nozzles are widely arranged around the yarn, the periphery of the yarn can be dyed in a wider area than with the head T alone. Therefore, if the number of ink jet injection steps is increased, that is, the number of heads is increased so that the traveling yarn can be entirely covered as a whole, dyeing can be performed over the entire periphery of the yarn. By arranging the head in such a manner, if the jet nozzle is jetted intermittently, for example, as shown in FIG. 11, a colored portion in a region perpendicular to the axial direction of the yarn, that is, a ring-shaped dyeing can be obtained. it can. Of course, if the above dyeing is repeated, it is also possible to dye such that the color of the colored portion in the region divided perpendicularly to the axial direction of the yarn is alternately different.

FIG. 4 is a diagram schematically showing a third embodiment of the present invention. The flat shape imparting step Z0 is added after the ejection rollers Q1 and Q2 and before the inkjet printing step Z. The flattened shape imparting step is a step of deforming the yarn into a flattened shape, for example, an elliptical shape, an oval shape, or the like. Here, flattening is performed by applying a pressing force by a flattening roller. .

Depending on the material of the yarn, heating the flattening rollers P1 and P2 is effective in imparting a flattened shape, and therefore the rollers are heated for the required yarn. It has been found from experiments by the inventors that the flat shape can be made more effective by, for example, attaching a water-soluble sizing agent or the like to the yarn before imparting the flat shape.

When the yarn Y sent out from the feed rollers Q1 and Q2 enters the flattening step Z0, the flattening rollers P1 and P2 press the yarn from both sides to crush it. Since it is necessary to apply a pressure suitable for the yarn quality, the pressure applied to the flattening rollers P1 and P2 can be adjusted.

FIG. 5 shows the XX cross section of the running yarn immediately after the flattening process, that is, the cross section of the flat yarn y, and the dotted line shows the cross section of the running yarn before passing through the flattening process. For the flat yarn y that has been flattened by being crushed, the head T is subjected to the first ink jet jetting process Z1 as in the embodiment of FIG.
Each of the ejection nozzles NZ1, NZ2, NZ3 ejects the dye ink toward the yarn. The jetted dye ink prints the yarn in a predetermined color as designed in the area dividing the yarn. At this time, since the yarn has a flat shape such as an ellipse, the radius r2 becomes smaller than the radius r1 before the flat shape is given as shown in FIG. 5, and the distance to the center of the yarn is shortened, so to speak. Becomes For this reason, the dye ink easily reaches the center of the yarn, and the dyeing condition becomes really vivid.

The yarn which has passed through the first ink jet jetting step Z1 advances in the direction of the arrow and is then sent to the second ink jet jetting step Z2 which is located behind it.
As described in.

After the yarn is deformed by the pressure of the flattening roller, the flat shape is maintained, but the first ink jet jetting process Z1 and the second ink jet jetting process Z2 are performed.
When the so-called ink jet printing step Z is completed after passing through and, the shape of the yarn gradually settles to its original shape due to its own recovery force. Needless to say, the thread shape is completely recovered by a post-treatment usually performed after inkjet printing, for example, wet heat treatment.

Although the present invention has been described above, it is needless to say that the present invention is not limited to the embodiments and various other modifications can be made without departing from the essence thereof. For example, the number of ejection nozzles provided in the head is not limited to three, and any number can be provided as long as they are physically arranged around the yarn. Further, the arrangement angle θ of the ejection nozzles is not uniform, and θ itself may be different one by one. Further, making the injection nozzle perpendicular to the yarn means substantially perpendicular, and some degree of freedom is within an allowable range. Also, it is naturally possible to provide several heads, that is, to provide the heads at any number in the traveling direction of the yarn.

[0045]

[Effect] It is possible to add a delicate microscopic pattern and color for each thread by design. Since a predetermined color can be intentionally applied to a predetermined place on the yarn, a fabric having a delicate pattern and color matching the sensitivities can be intentionally dyed.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a printing process of an inkjet dyeing method.

FIG. 2 is a schematic diagram showing a printing process of an inkjet dyeing method in which a head has a phase difference.

FIG. 3 is a schematic diagram showing a phase shift between two head arrangements.

FIG. 4 is a schematic diagram showing a printing step of an inkjet dyeing method having a flattened shape imparting step.

FIG. 5 is a diagram schematically showing a cross-sectional view of a yarn.

FIG. 6 is a diagram schematically showing a dyed yarn having three colored portions.

FIG. 7 is a diagram schematically showing a dyed yarn having a colored portion of one color.

FIG. 8 is a diagram schematically showing a dyed yarn having intermittently colored portions of three colors.

FIG. 9 is a diagram schematically showing a dyed yarn having an intermittently colored portion of one color.

FIG. 10 is a diagram schematically showing a dyed yarn having an intermittently colored portion which is colored in the shape of a dashed-dotted line.

FIG. 11 is a diagram schematically showing a dyed yarn colored in a ring shape.

[Explanation of symbols]

A part colored in three colors in the axially separated area of the yarn B part colored in one color in the axially separated area of the yarn C three intermittent colors of a constant length Part D that is colored with a certain length and is intermittently colored with a certain length E One-dot broken line part with a color of F F Part that is colored in a region that is perpendicular to the axial direction of the yarn NZ1 , NZ2, NZ3 inkjet jet nozzles nZ1, nZ2, nZ3 inkjet jet nozzles P1, P2 flattening roller Q1, Q2 feed roller T head t head Y yarn y flat yarn Z inkjet printing process Z0 flat shape imparting process Z1 first inkjet jet Step Z2 Second inkjet ejection step α Phase difference

Claims (5)

[Claims] 1. An inkjet dyeing method, characterized in that a continuously running yarn is surrounded by a head having a plurality of inkjet jet nozzles, and inkjet printing is performed from the jet nozzles toward the yarn. 2. A head having a plurality of ink jet ejection nozzles is surrounded by the head at a plurality of locations along a direction of continuous traveling of the yarn, and ink jet printing is performed from the ejection nozzle toward the yarn. Inkjet dyeing method. 3. The inkjet dyeing method according to claim 2, wherein the phases of the heads are different from each other. 4. The ink jet dyeing method according to claim 1, wherein the running yarn is previously provided with a flat shape imparting step. 5. The ink jet dyeing method according to claim 5, wherein the flattening step is performed by pressing force using a roller.