JP3194032B2 - Printing method for diacetate fiber fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for printing diacetate fiber cloth.

[0002]

2. Description of the Related Art Diacetate fibers have superior moisture absorption to synthetic fibers for general apparel, mainly polyester fibers, and are made of the same cellulose as rayon as a raw material. It has excellent characteristics such as being hard to swell, has excellent quick-drying properties, is light and supple, has a silky luster and is thermoplastic, and has been attracting attention as a fiber for women's clothing requiring drape properties.

[0003]

As described above, diacetate fibers have the properties of cellulosic fibers such as rayon and cotton fibers and the properties of synthetic fibers such as polyester fibers, and are suitable for semi-synthetic fibers suitable for women's clothing. Although it is a fiber, the dye applicable to it is a disperse dye, and in the heating and coloring step, the presence of moisture is essential, and the strength tends to decrease at high temperatures where the moisture is present, and in the presence of alkali after heating and coloring. The dyeing mechanism is extremely complicated compared to that of other fibers, such as saponification easily occurring in the washing process, and it is possible to obtain a robust diacetate fiber printed fabric that has been vividly colored without lowering the strength than in the past. It has been made impossible.

[0004] More specifically, in the case of using a high-pressure steamer, that is, a so-called high-pressure steamer in a sealed high-pressure kettle for heating and coloring by steaming heat treatment after printing the printing paste, the set temperature is set to 100 ° C according to a conventional method. At low temperatures before and after, it is not possible to obtain a diacetate fiber printed fabric with sufficient color developability and fastness, and if the set temperature is raised to a high temperature of around 130 ° C., which is the upper limit of the high-pressure steamer,
Although the coloring property and the fastness are improved, the strength is reduced.

On the other hand, a high-temperature steamer capable of setting a set temperature to a high temperature of 100 to 200 ° C., that is, a so-called high-temperature steamer in which an inlet / outlet is opened and a temperature inside the steamer can be increased without limit through a heat exchanger. In the heat coloring process by the char steamer, the inside of the steamer is too hot and the relative humidity is extremely low, so that the strength of the diacetate fiber caused by the action of water is avoided and the color developability and robustness of the printed fabric are slightly improved. I do. However, in the case of heat color development under low humidity, a large amount of a moisturizer such as polyethylene glycol or an aliphatic amine derivative, which replenishes the water necessary for the color development of the dye, must be incorporated into the printing paste. As a result, the disperse dye to be printed on the fabric tends to bleed out from the time of printing, and as a result, a printed fabric of sharp diacetate fibers at the time of printing is difficult to obtain.

At the same time, in the heating and coloring process in a high-temperature steamer having a very low relative humidity and a very high temperature of 160 ° C. or more, the printed paste is hardened and cannot be easily washed and removed. A strong alkali washing liquid is required for the desizing cleaning, but such a strong alkali washing liquid cannot be applied to a diacetate fiber cloth which is saponified even if it can be applied to polyester fibers and the like.

For the reasons described above, it has become common knowledge in the industry that a robust diacetate fiber printing fabric which withstands use as a garment in terms of physical strength and has a vivid color cannot be obtained. Dyeing of diacetate fiber fabrics is done by so-called plain dyeing, which is soaked in a dye bath at around 80 ° C for a long time without a decrease in strength, but it is not surprising that printing is performed on it. Its use is limited to clothing, bedding, and the like, for which particular robustness does not matter.

FIG. 1, FIG. 2, FIG. 3 and FIG. 4 show the relationship between the processing time and the temperature condition which are usually set in the heating and coloring processing of each apparatus of dry heat, dyeing (hot water), high pressure steamer and high temperature steamer. FIG. 3 is a curve diagram showing how much the diacetate fiber strength decreases and how much the diacetate fiber elongation changes, and the temperature dependence of the change. In the figure, a curve "S" shown by a solid line shows the relationship between the temperature condition and the strength decrease, and a curve "P" shown by a dotted line shows the relationship between the temperature condition and the elongation. Unit "S%" at the left end of each curve diagram
Is the strength reduction rate (100 × b / a) obtained by dividing the strength (b) after the treatment by the strength (a) before the treatment of the diacetate fiber, and the unit “P%” on the left end is the treatment shown in percentage. This is the elongation of the diacetate fiber afterwards, and the curve "S" shown by a solid line and the curve "P" shown by a dotted line are respectively accompanied by the measured values of the strength reduction rate and the elongation corresponding to the processing temperature.

That is, FIG. 1 shows the temperature dependence of the diacetate fiber strength reduction rate and elongation change when kept under dry heat for 1 minute, and FIG. FIG. 3 shows the temperature dependence of the strength reduction rate and elongation change of the diacetate fiber when placed in hot water for 60 minutes. FIG. 3 shows a pressure cooker according to a conventional method of heating and coloring using a high-pressure steamer. FIG. 4 shows the temperature dependence of the strength reduction rate and elongation change of the diacetate fiber when placed under steaming for 30 minutes.
Illustrates the temperature dependence of the diacetate fiber strength reduction rate and elongation change when placed under high heat for 10 minutes in a steamer with a built-in heat exchanger according to the usual method of heating and coloring treatment using a high-temperature steamer Is what you do. It will be understood from these curves that, as described above, the physical strength of the diacetate fiber greatly depends on moisture and heat.

[0010]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a light and flexible material having excellent physical properties such as hygroscopicity, low swelling property, quick drying property, thermoplasticity and low refractive index as compared with other fibers commonly used in clothing. It is an object of the present invention to obtain a colorful and novel printed fabric suitable for women's clothing, which has a good touch and is rich in drape, utilizing the characteristics of diacetate fiber having a rich silky luster.

[0011]

The present invention is characterized in that a printing paste containing sodium polyacrylate and sodium alginate is printed on a fabric containing diacetate fibers, and steamed at 160 ° C. or more. The gist of the invention is a method for printing an acetate fiber cloth. A normal pressure high temperature steamer is used as the steam heat treatment. That is, the present invention focuses on the fact that when the diacetate fiber fabric on which the printing paste is printed is passed through a high-temperature steamer at 160 ° C. or higher to perform a heat-coloring treatment, the strength does not decrease, and the printing paste has sodium polyacrylate and alginic acid. When soda is blended, the color develops vividly, the dye printed on the fabric does not bleed out from the printing mold, the printed paste does not solidify firmly, and saponification does not occur in the desizing and washing process after color development It was completed with the knowledge that the weak alkaline cleaning solution could easily perform a complete desizing cleaning treatment, and that the excellent characteristics of the diacetate fiber, such as suppleness and rich silky luster, were not impaired. Things.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Accordingly, the printing paste is a paste such as starch, guar gum, crystal gum, tamarind, carboxymethyl starch, carboxymethylcellulose soda salt (CMC) which has been conventionally used for printing by heating and coloring with a high-temperature steamer. Prepared with a reducing inhibitor such as sodium chlorate or sodium metanitrobenzenesulfonate, a humectant such as polyethylene glycol or an aliphatic amine derivative, urea, or a pH adjuster such as ammonium tartrate, ammonium citrate or ammonium malate It can be prepared by blending sodium polyacrylate, sodium alginate, the required disperse dye and water with the base paste thus obtained.

[0013] Sodium polyacrylate and sodium alginate are used to form a printing paste, which is gelled and hard and firmly (tickly) fixed in a heating and coloring process in a high-temperature steamer heated to 160 ° C. or higher, which has a very low relative humidity, by strong alkali. It enables complete desizing and washing with a weak alkaline washing solution regardless of the washing solution, and when either one of sodium polyacrylate and sodium alginate is missing, the expected color development of the printing paste decreases, and The expected degreasing properties cannot be obtained. For example, in a printing paste that lacks sodium alginate and contains only sodium polyacrylate, the color developability of the dye is improved, but the depasting property of the printed paste after the heat coloring process is insufficient.
Conversely, in the printing paste which lacks sodium polyacrylate and contains only sodium alginate, the depasting property of the printing paste after the heat coloring treatment is improved, but the coloring property of the dye is not improved.

In other words, the combined use of sodium polyacrylate and sodium alginate does not hinder each other's functions, but rather promotes the mutual functions to obtain expected results. For that purpose, although it depends on the kind of paste such as starch or crystal gum that constitutes the original paste, generally, other pastes (paste other than sodium polyacrylate and sodium alginate) that constitute the original paste 100 dry weight It is advisable to mix 2 to 20 parts by weight of sodium polyacrylate and 10 to 50 parts by weight of sodium alginate to each part. The upper limit of the set temperature in the high-temperature steamer depends on the heating color development time (speed), but generally may be set to 200 ° C. or lower.

In printing on pile fabric or needle punch felt, the printing paste does not act on the back surface of pile fabric or needle punch felt. Therefore, other fibers such as cotton, rayon, nylon, acrylic fiber, polypropylene fiber and the like having different dyeability from diacetate fiber may be interposed on the inside and the back of the fabric, and diacetate may be formed on the surface. Polyester fibers and triacetate fibers having the same dyeability as the fibers may be mixed. in this way,
The term “fabric containing diacetate fiber” as used in the present invention refers to a woven fabric, a knitted fabric, or a nonwoven fabric composed only of diacetate fiber, and a polyester fiber or triacetate fiber that can be dyed with a disperse dye similarly to diacetate fiber. Mixed, mixed weaving and knitting of acetate fibers,
Fabric in which diacetate fibers constitute the front surface and the inside and the back surface are made of other fibers having different dyeability from diacetate fibers, for example, multiplex of weft duplex, warp duplex, full duplex, triple weave structure, etc. It also means a woven or knitted fabric, a pile fabric, or a needle punch felt. Hereinafter, the present invention will be described with reference to examples.

[0016]

EXAMPLE A printing paste having the composition shown in Table 2 was prepared by using the original paste having the composition shown in Table 1 and printed on a diacetate fiber woven fabric having a basis weight of 150 g / m ² using a printing screen. After the printed coating film of the printing paste is dried, the temperature in the steamer is set to 175 ° C. by a high-temperature steamer.
And then washed with water at 40 ° C for 10 minutes, and washed with a 40 ° C washing solution (PH-9), a 60 ° C washing solution (PH-9), and a 70 ° C washing solution (PH-9) having the composition shown in Table 3 below. 80 ℃
Desizing and cleaning with a cleaning solution (PH-9) for 5 minutes each,
It was washed with water at room temperature for 10 minutes and dried. The diacetate fiber printed fabric thus obtained has a silky luster before printing, and the dye is vividly colored, and its physical properties are shown in [Table 4].
As shown in Table 2, no decrease in strength was observed, and various fastnesses could be sufficiently satisfied as clothing fabrics.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Table 3]

[0020]

[Table 4]

[0021]

Comparative Example A printing paste having the composition shown in [Table 6] was prepared using the original paste having the composition shown in [Table 5], and printed on a diacetate fiber woven fabric having a basis weight of 150 g / m ² using a printing screen. After the printed coating film of the printing paste is dried, the temperature in the steamer is set to 175 ° C. by a high-temperature steamer.
And then washed with water at 40 ° C. for 10 minutes, and washed with a 40 ° C. cleaning solution (PH.9), a 60 ° C. cleaning solution (PH.9), and a 70 ° C. cleaning solution (PH.9) having the composition shown in [Table 7]. 80 ℃
Desizing and cleaning with a cleaning solution (PH-9) for 5 minutes each,
It was washed with water at room temperature for 10 minutes and dried. The diacetate fiber printed fabric thus obtained had poor degreasing properties and physical properties as shown in [Table 8], had poor fastnesses, and lacked physical properties as clothing fabrics.

[0022]

[Table 5]

[0023]

[Table 6]

[0024]

[Table 7]

[0025]

[Table 8]

[0026]

According to the present invention, it is possible to carry out a complete desizing and washing treatment with a weakly alkaline washing liquid on a printed fabric which has been subjected to a heating and coloring process, without causing a decrease in the strength of diacetate fibers.
Visible color of dye, excellent fastness to dyeing such as washing resistance, nitric oxide gas resistance, rubbing resistance, silky luster, light and supple, drapable, suitable for clothing and bedding A textile printing fabric is obtained.

[Brief description of the drawings]

FIG. 1 is a curve diagram showing temperature dependence of strength and elongation of diacetate fiber by dry heat treatment.

FIG. 2 is a curve diagram showing the temperature dependence of strength and elongation of diacetate fiber by hot water treatment.

FIG. 3 is a curve diagram showing the temperature dependence of strength and elongation of diacetate fiber by a high-pressure steamer.

FIG. 4 is a curve diagram showing the temperature dependence of strength and elongation of diacetate fiber by a high-temperature steamer.

[Explanation of symbols]

 Curve showing temperature dependence of strength of S diacetate fiber Curve showing temperature dependence of elongation of P diacetate fiber

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-216761 (JP, A) JP-A-7-97785 (JP, A) JP-A-7-82674 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) D06P 5/00 D06P 3/40

Claims (2)

(57) [Claims] 1. A method for printing diacetate fiber cloth, comprising printing a printing paste containing sodium polyacrylate and sodium alginate on a cloth containing diacetate fibers, followed by steaming at 160 ° C. or higher. 2. The method for printing diacetate fiber cloth according to claim 1, wherein a normal pressure high temperature steamer is used as the steaming heat treatment.