JP3861355B2 - Method for producing dyed fabric - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a high-definition, high-quality dyed fabric, and more particularly, to a method for producing a dyed fabric that is highly effective for a spray method, an inkjet method, or the like.
[0002]
[Prior art]
Inkjet technology is widely used as a computer peripheral device for paper and OHP, but it is also partly put into practical use as a plateless recording technology for QR and small lot multi-product types in the fabric recording industry. It came to.
[0003]
In the ink jet technology, in many cases, the amount of ink that is struck onto a pixel virtually set on a recording medium is an integer number of drops of about 1 or 2 drops, for example, 0.4 drops or 1.7 drops It is not possible to control the amount of one drop freely. For this reason, in order to express the gradation of the color, a plurality of pixels are combined and regarded as one pixel, and the gradation is expressed by adjusting the amount of ink applied therein. If this measure is taken, if ink drops of dozens or tens of drops are injected into one pixel in order to increase the number of gradations in one pixel, there arises a problem that bleeding occurs.
[0004]
On the other hand, a colorant having a high color value is usually used for inkjet ink so that a dark color can be expressed. Furthermore, it is desirable to use such colorants in high concentrations. However, in general, increasing the density is often an obstacle in terms of ink jet suitability in terms of viscosity, nozzle clogging, stability, etc., and there is a limit to increasing the density.
[0005]
Ink-jet inks generally have a low viscosity, and it is well known that bleeding occurs when recording on untreated paper or fabric, and the quality of the recorded image decreases. For this reason, various blur prevention processes have been proposed. However, if the effect of preventing bleeding is too high, for example, in a uniform color area where the same ink is applied to all pixels, an area where the ink does not adhere or does not spread sufficiently remains, and an irritated feeling or a white-eye tingling occurs. May occur. In particular, in the case of an intermediate gradation, there is a tendency that a feeling of irritation is likely to occur even if the effect of preventing appropriate blurring is obtained. If the ink application amount is increased in order to avoid such a phenomenon, blurring increases and a sharp image quality cannot be obtained. Therefore, it is preferable to increase the resolution of the ink jet device because it reduces the feeling of irritation. However, in order to increase the resolution, it is necessary to make the nozzle diameter thinner in order to make ink droplets smaller, and another problem arises that nozzle clogging is likely to occur.
[0006]
When the ink jet technology having the above characteristics is used for applying a dye to a fabric, a certain degree of back-through is required unlike paper and OHP. For this reason, it is necessary to apply a larger amount of ink than paper. However, there is a problem that this tends to cause an increase in bleeding.
[0007]
[Problems to be solved by the invention]
The present invention solves the above problems when ink jet technology is used for applying dyes to fabrics, and is intended to reduce irritation, dot feeling, whitening prevention, substantially improve resolution, darken, and reduce bleeding. Further, as will be described later, the present invention is not limited to the ink jet dyeing technique, but can be effectively used for a spray method and other conventional printing methods.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention comprises the following invention specific items.
[0009]
That is, by applying a heat treatment in a state where tension is applied to the fabric, the area of the fabric after the heat treatment is set to 110 to 400% of the area of the fabric before the heat treatment, and then a colorant is applied to the fabric. This is a method for producing a featured dyed fabric.
[0010]
Further, the present invention is the method for producing a dyed fabric according to the above (1) , wherein the heat treatment is performed in a bleeding preventing treatment step for the colorant fabric .
[0011]
Furthermore, the present invention is characterized in that the means for applying a colorant to the fabric is a spray method or an inkjet method, and the fabric is stretchable and is either a woven fabric, a knitted fabric or a non-woven fabric. This is a method for producing a dyed fabric as described above.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail.
[0013]
As an example of the embodiment of the present invention, a case where a picture, a pattern, or a plain color is ink-jet recorded on a fabric will be described. When ink jet recording is performed on a fabric, the warp and / or weft of the fabric is stretched by being stretched so that the basis weight of only the fiber component is smaller than that under no tension. When the tension is released after recording, the fabric returns to its original state. By doing so, the object of the present invention is to reduce the irritability, improve the actual resolution, darken the color, and reduce the blur. The fabric whose tension is released here refers to a fabric used as a product.
[0014]
The products referred to in the present invention include clothes, gloves, mufflers, hats, handkerchiefs, tapestry, bags, bags, labels, etc. that are mainly worn, used and viewed by general consumers, and various kinds of fabrics. It refers to a fabric that has been subjected to various processes such as various physical and / or chemical processes such as heat setting, hair burning, water repellent processing, antibacterial processing, and form stabilization processing. Moreover, the fabric weight and area of the fabric used as a product in the present invention refers to those measured in a state where tension is not substantially applied to the fabric.
[0015]
Here, the basis weight of only the fiber component of the stretched fabric during ink jet recording is A (g / m ² ), and the basis weight of only the fiber component of the fabric when the subsequent tension is released is B (g / m ² ). When this is the case, ink jet recording is performed by setting the dimensions of the fabric so that the relationship between them is the following one.
[0016]
1.1 x A ≤ B ≤ 4 x A ... When 1 formula 1.1 x A> B, there is no substantial effect, and when B> 4 x A, there is a problem of irreversible elongation. There is.
[0017]
The relational expression is more preferably 1.2 × A ≦ B ≦ 4 × A (2), and more preferably,
1.4 × A ≦ B ≦ 4 × A (3), and still more preferably
1.6 × A ≦ B ≦ 4 × A (4 formulas) In order to achieve deepening of irritating feeling reduction, dot feeling reduction and white eye peeling reduction, it is preferable that there is a relationship of 2 to 4 formulas, and in order to obtain a high effect of substantial resolution improvement for inkjet recording etc. 3 to 4 are more preferable.
[0018]
Alternatively, the present invention may be defined in terms of recording area. That is, when the recording area on the stretched fabric at the time of inkjet recording is C (m ² ), and the recording area on the fabric when the tension is released is D (m ² ), the relationship between them is
Ink jet recording is performed by setting the fabric dimensions so that the following five formulas are satisfied.
[0019]
1.1 × D ≦ C ≦ 4 × D ... 5 In the case of 1.1 × D> C, there is no substantial effect, and in the case of C> 4 × D, there is a problem of irreversible elongation. .
[0020]
More preferably, the relational expression is
1.2 × D ≦ C ≦ 4 × D (6), more preferably
1.4 × D ≦ C ≦ 4 × D (7), and still more preferably,
1.6 × D ≦ C ≦ 4 × D (8 formulas) Although there are some errors, Equations 5-8 correspond to Equations 1-4, respectively.
[0021]
As described above, in order to achieve the present invention, it is preferable that the fabric is substantially stretchable. Therefore, the knitted fabric is preferably used, but the stretchability using a crimped yarn, spandex, or the like is used. It may be a woven or non-woven fabric. For example, a two-weight ricot that can be expanded and contracted freely used in swimsuits, leotards, and the like is an example that is preferably used. However, even if there is no stretchability, a fabric having high heat setting properties may be realized as described later, and the present invention is not limited to the stretchable fabric. In addition, the main material of the fabric used in the present invention is a mixture of synthetic fibers such as polyester, nylon and acrylic, and natural fibers such as cotton and silk. The present invention may not be limited by these.
[0022]
In the above-described one embodiment, the inkjet recording mainly suitable for expressing a picture is given. However, the present invention can be replaced by a spray method mainly suitable for expressing a plain color. In addition, there are effects such as leveling, darkening, reduction in irritability, and reduction in whitening, which are effective. Moreover, although spray and inkjet are plateless technologies, the same effect can be obtained when used for conventional flat screen printing, rotary printing, roller printing, and the like.
[0023]
Further, in the above-described one embodiment example, the fabric was stretched by applying tension to the fabric during the ink jet recording, that is, the step of applying the colorant to the fabric. You may give the process which the fabric weight of only the fiber component of a fabric becomes 25 to 90% before and behind a process. Although there are some errors, this is substantially equivalent to performing a process in which the area of the fabric becomes 110 to 400% before and after the previous process, and is intended to be 1 to 8. This method has an advantage in that it is not necessary to add a mechanism for applying tension to the fabrics in these apparatuses for ink jet recording, spray recording, and conventional textile printing. That is, a conventional apparatus can be used. There is no particular limitation on the step of applying a treatment in which the basis weight of only the fiber component of the fabric is 25 to 90%, but it can be achieved, for example, most simply by heat treatment under tension. In addition, in the case of inkjet recording, spray recording, etc., it is preferable to perform a bleed prevention treatment on the fabric, but in that case, the heat treatment under tension and the bleed prevention treatment may be separately performed. In order to prevent complication, it is more preferable to perform a heat treatment under tension at the same time as the blur prevention treatment. That is, in many cases, the bleed prevention treatment is performed after padding the fabric in the bleed prevention treatment solution, and the drying process is performed by using a tenter or the like to perform a heat treatment under tension. In such a case, if the anti-bleeding agent contains a paste or a polymer, the fabric becomes crisp and the shape stability is improved, so that the basis weight of only the fiber component is easily maintained at 25 to 90%, and ink jet recording. This is more preferable for a fabric conveyance system such as an apparatus.
[0024]
According to the present invention, when characters, pictures, patterns, and the like are printed on a cloth as usual instead of plain, the letters, pictures, patterns, etc. are reduced when used as a product. If it does not matter, no particular treatment is required, but it is more preferable that the colorant-improved image is stretched so that the recorded image on the fabric used as a product becomes an image of a desired size. It is to give. For example, if the fabric basis weight in the step of applying the colorant is 90% of the basis weight of the product, an image such as a character, a picture, or a pattern may be recorded in a size approximately 1.05 times in length and width. The desired image size is obtained at the product stage.
[0025]
After the step of applying the colorant, as a method of raising the fabric to the basis weight of the product, that is, a method of shrinking, if the step of applying the colorant is merely applying tension to the fabric and stretching, The tension may be removed, and when it is stretched by another method, it is premised that the heat treatment or the coloring component is fixed to the fabric. You can take appropriate measures.
[0026]
The colorant referred to in the present invention means a substance containing a coloring component such as a dye or a pigment, and is appropriately selected according to the step of applying the colorant and the material and purpose of the fabric. Since it is a matter of course, it is omitted here. From the standpoints of fabric texture and friction fastness, it is preferable to use a dye and dye the dye inside the fiber. It is more preferable that this dyeing process also serves as the shrinking means. For example, in the case of ink jet dyeing, as a pre-process for ink jet recording, a blur prevention treatment liquid containing a paste is used to perform a blur prevention treatment so that the fabric weight is reduced by the paste. Next, after ink jet recording using an ink containing a dye as a coloring component, heat treatment is performed so that the dye is dyed inside the fiber (more preferably in a steam atmosphere), and then a paste is contained. The anti-bleeding treatment agent may be removed by washing with water, appropriately soaping, reductive cleaning or the like.
[0027]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
[0028]
[Example 1]
A pre-treatment solution consisting of 5% by weight of calcium chloride and 20% by weight of guar gum was applied to a two-weight recot knit fabric made of copolymerized polyester fiber and spandex fiber having a basis weight of 180 g / m ² used for a swimsuit by a pad-dry method. . At the time of drying, the fabric was stretched so as to extend 10% in the weft direction as compared with that under no tension and dried by heating with a tenter. The basis weight of only the fiber component of the obtained anti-bleeding knit fabric was 164 g / m ² in terms of area.
[0029]
An image was recorded on the obtained blur-prevention-treated knit fabric by an ink jet method using an ink containing a disperse dye using an anionic dispersant as a colorant component. At that time, the image was stretched 10% and recorded in the weft direction of the fabric.
[0030]
Next, heat treatment was performed at 180 ° C. in a water vapor atmosphere to disperse the disperse dye on the knit fabric inside the fiber.
[0031]
Then, it processed in order of water washing, reduction washing, water washing, and drying. As a result, the basis weight of the knitted fabric returned to the original 180 g / m ² , and the dyed image was clean and free from irritation.
[0032]
[Example 2]
The steps are substantially the same as those in the first embodiment, but at the time of ink jet recording, the knit fabric is 1.5 times longer and 1.3 times longer than the original state before the anti-bleeding treatment is performed. Tension was applied. In addition, an image to be inkjet-recorded was also recorded by being stretched according to the stretching of the knit fabric. The basis weight of only the fiber component at this time was 90 g / m ² in terms of area.
[0033]
The finally obtained dyed knit fabric has returned to the original 180 g / m ² , the dyed image has no irritation and dot feeling, and the substantial resolution has improved. The quality was even higher than 1. Moreover, it was darker than Example 1.
[0034]
[Example 3]
A solid color was recorded on the original knit fabric used in Example 1 by a spray method using an ink containing a disperse dye as a coloring component. At that time, the knit fabric was recorded under tension so that the warp and weft directions of the knit fabric were 30% longer than those under no tension.
[0035]
Next, heat treatment was performed at 180 ° C. in a water vapor atmosphere to disperse the disperse dye on the knit fabric inside the fiber.
[0036]
Then, it processed in order of water washing, reduction washing, water washing, and drying. As a result, the basis weight of the knitted fabric returned to the original 180 g / m ² , and the dyed plain color was beautiful without an irritating feeling.
[0037]
[Comparative Example 1]
In the drying stage of the blur prevention treatment of Example 1, a belt-conveying dryer capable of drying without tension was used instead of the tenter. The basis weight of only the fiber component of the obtained anti-bleeding knit fabric was 180 g / m ² , which was not changed from the original, because the area did not change.
[0038]
In the same manner as in Example 1, this knit fabric was processed in the order of inkjet recording, dyeing, washing with water, reduction washing, washing with water and drying.
[0039]
The dyed image of the obtained knit fabric has a feeling of irritation, is slightly lighter than Example 1, is considerably lighter than Example 2, and even when the edge portion of the image is seen, Example 1 Compared to Example 2, the image was slightly blurred due to slight bleeding.
[0040]
[Comparative Example 2]
A solid color was recorded on the original knit fabric used in Example 1 by a spray method using an ink containing a disperse dye as a coloring component. At that time, recording was performed without applying a tension higher than the wrinkle extension so that the warp and weft directions of the knit fabric did not substantially extend.
[0041]
Subsequently, it processed in order of dyeing | staining, water washing, reduction washing | cleaning, water washing, and drying similarly to Example 3.
[0042]
As a result, the plain was irritated and lighter than that of Example 2.
[0043]
【The invention's effect】
According to the present invention, when producing a dyed fabric using an ink jet method, a spray method, or a conventional printing method, it is possible to achieve an irritating feeling, prevention of dot feeling, substantial resolution improvement, darkening, and reduction of bleeding. Is.

Claims (5)

It is characterized by applying a colorant to the fabric after applying the heat treatment in a state where tension is applied to the fabric so that the area of the fabric after the heat treatment is 110 to 400% of the area of the fabric before the heat treatment. A method for producing a dyed fabric. 2. The method for producing a dyed fabric according to claim 1 , wherein the heat treatment is performed in a bleeding preventing treatment step for the colorant fabric . The method for producing a dyed fabric according to claim 1 or 2, wherein the means for applying a colorant to the fabric is a spray method. The method for producing a dyed fabric according to claim 1 or 2, wherein the means for applying a colorant to the fabric is an ink jet method. The method for producing a dyed fabric according to any one of claims 1 to 4, wherein the fabric is stretchable and is one of a woven fabric, a knitted fabric, and a non-woven fabric.