JPH09158038A - Polyester textile fabric improved in color fastness and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably improve the color fastness even in a deep color, especially the fastness to alkalis and perspiration by dyeing a polyester textile fabric with a disperse dye and then carrying out the ozone treatment. SOLUTION: A plain weave fabric woven by using multifilament yarns, comprising polyethylene terephthalate as a main constituent component and having <=1.0de single filament size as warp and weft yarns is scoured, relaxed, preset and dyed with a disperse dye at a high temperature of 130 deg.C. The reducing washing is then carried out and the fabric, as necessary, is impregnated with a resin, dried and treated by curing. The dyed fabric is then exposed into ozone at 500-100000ppm, preferably 100-50000ppm for 10sec to 100min, preferably 20sec to 30min to afford a dyed fabric having a dye concentration of <=40, preferably <=25 value of L, <=2.0×10<-4> g/g fiber extracted amount of the dye when extracted from polyester fibers constituting the fabric with ethanol and further >=4 class fastness to alkalis and perspiration after wet heat deterioration tests of the fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber cloth having improved dyeing fastness, especially alkaline sweat fastness, even though it is dyed in a dark color, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, when a polyester fiber cloth is dyed with a disperse dye and then coated with an acrylic resin, a urethane resin or a vinyl chloride resin, the disperse dye is transferred and transferred to a coating resin layer to form a resin layer. Known to pollute.

This phenomenon is due to the fact that the disperse dye has a physical dyeing mechanism that does not have a chemical bond with polyester, and that the disperse dye is soluble in an organic solvent or the above resin.
Affinity has a synergistic effect, and for example, JP-A-5-287673 discloses a method for solving the above-mentioned problems by ozone treatment.

On the other hand, as a method for improving the dyeing fastness of a polyester fiber cloth having no coating resin layer, reduction washing after dyeing is commonly used.

However, particularly when the dye concentration used is high, for example, when dyeing a dark color such as black or blue, or when dyeing a fabric composed of ultrafine polyester fibers having a single fiber fineness of 1.0 denier or less. However, the dye adhered to the surface of the polyester fiber is not sufficiently removed even after reduction washing, and the dyeing fastness is remarkably reduced.

[0006]

The object of the present invention is to significantly improve the dyeing fastness, especially the alkaline sweat fastness, in a polyester fiber cloth having no coating resin layer, even though the dye concentration used is high. To provide a polyester fiber cloth and a method for producing the same.

[0007]

Means for Solving the Problems As a result of intensive studies for achieving the above object, the inventors of the present invention have found that a dye (for example, a cationic dye) which is dyed by a chemical bond is used or dyeing without resin coating. Even in cloth,
It was clarified that the dye migrates to the fiber surface by the heat treatment (drying, final set, etc.) after dyeing, and that the drop-off of this dye causes a decrease in dye fastness, and the present invention is completed. I arrived.

Thus, according to the present invention, in a cloth mainly composed of dyed polyester fibers and having an L * value of 40 or less, the amount of dye extracted when the polyester fibers constituting the cloth are extracted with ethanol is 2.0. × 10 ^-4 g
/ G · fiber or less, and a polyester fiber cloth with improved dyeing fastness, characterized in that the alkaline sweat fastness after the wet heat deterioration acceleration test is grade 4 or higher, and mainly composed of polyester fibers There is provided a method for producing a polyester fiber cloth having an improved dyeing fastness, which comprises subjecting the dyed cloth to dyeing and / or resin impregnation, followed by ozone treatment.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The constituent features of the present invention will be described in detail below.

The polyester fiber used in the present invention is
A fiber composed of polyester having terephthalic acid as a main acid component and at least one glycol, preferably at least one alkylene glycol selected from ethylene glycol, trimethylene glycol and tetramethylene glycol as a main glycol component. .

Further, a cationic dye dyeability obtained by copolymerizing the polyester with an isophthalic acid component containing a metal sulfonate group such as 5-sodium sulfoisophthalic acid or 5-tetrabutylphosphonium sulfoisophthalic acid by a known method. It may be polyester, and may be one added with a stabilizer, an antioxidant, a flame retardant, an antistatic agent, a fluorescent color enhancer, a catalyst, a colorant, inorganic fine particles and the like within a range not impairing the object of the present invention.

The shape of the above polyester fiber may be filament, woolly processed yarn, spun yarn, or if necessary, natural fibers such as cotton and wool, recycled fibers such as rayon, polyethylene terephthalate type polyester as a hard segment, and It may be used in the form of mixed fiber or mixed spinning with block copolymerized polyetherester elastic fiber having oxybutylene glycol type polyester as a soft segment and other synthetic fiber.

The fineness of the polyester fiber is not particularly limited, but the effect of the present invention can be remarkably exhibited when ultrafine fibers having a single fiber fineness of 1.0 denier or less are used.

The cloth mainly composed of polyester fibers used in the present invention means a woven or knitted product using only polyester fibers, a non-woven fabric, or a mixture of polyester fibers and nylon fibers (mixed weaving, knitting), Mixed product of polyester fiber and cotton, mixed product of polyester fiber and wool, mixed product of polyester fiber and rayon, etc.
A polyester fiber containing 50% or more.

Further, the above-mentioned cloth may be one which has been subjected to alkali reduction treatment in order to improve the feeling.

In the present invention, after the cloth composed of the polyester fiber is dyed, and when the resin is further applied, the resin is applied, and after drying and curing, the cloth is not further subjected to a heat history. It is necessary to treat with ozone.

When the cloth is subjected to heat history after the ozone treatment, the dye fixed inside the fiber moves to the surface of the fiber, and the effect of improving the dyeing fastness is not exhibited.

In the dyeing, any conventionally known method can be arbitrarily adopted, and as the dye, a disperse dye, a cationic dye, an acid dye, a direct dye, a slene dye or the like is arbitrarily adopted depending on the kind of fibers constituting the cloth. To be done.

The above-mentioned application of the resin is not a coating process for forming a resin film having a thickness of 100 to 500 μm on the entire surface of the cloth as described above, but imparts water repellency and sweat absorption to the cloth. For this purpose, the so-called padding process, in which a fluorine-based, silicon-based, or polyalkylene glycol-based resin film having a thickness of about 100 angstrom to 1 μm is scattered on the surface of the single fiber of the polyester fiber constituting the cloth, is referred to.

For the ozone treatment in the present invention, a conventionally known apparatus may be used. For example, after introducing ozone into a treatment chamber made of stainless steel or glass and controlling it to a predetermined ozone concentration, the polyester fiber cloth is treated in the treatment chamber. It can be exposed to ozone at room temperature and atmospheric pressure.

At this time, in order to prevent leakage of ozone or stabilize the ozone concentration, the inside of the processing chamber may be slightly pressurized or depressurized.

The ozone concentration used in the present invention is preferably 500 to 100,000 ppm, more preferably 1000.
50,000 ppm.

The time required for ozone treatment is preferably 10 seconds to 100 minutes, more preferably 20 seconds to 30 minutes.
Minutes.

Further, in order to enhance the effect of ozone treatment, it is preferable to heat the ozone atmosphere in the treatment chamber,
A preferred temperature is 30 to 100 ° C., and a more preferred temperature is 4.
0-70 ° C.

The polyester fiber cloth thus obtained has an L * value of 40 or less, more preferably an L * value of 25.
Even when it is dyed in the following dark colors, the amount of dye extracted when the polyester fibers constituting the cloth are extracted with ethanol, that is, the amount of dye fixed on the fiber surface is 2.0 × 10 ^−4.
It is less than g / g · fiber and shows excellent dyeing fastness that the alkaline sweat fastness after the wet heat deterioration acceleration test is grade 4 or higher.

The above-mentioned wet heat deterioration acceleration test (the fabric is left for 6 days in a humid heat atmosphere at a temperature of 45 ° C. and a humidity of 90% RH) is equivalent to about 3 months in a hot and humid atmosphere such as a ship bottom. It is a condition, and it is said that, if this condition is cleared, the quality deterioration of the fabric due to transportation is unlikely to occur.

[0027]

[Action] Generally, on the surface of the polyester fiber after dyeing,
Extra dye that does not contribute to the color development of the fiber is fixed,
The detachment of the dye causes a decrease in color fastness.

Usually, the dye is removed by reduction washing, but when the polyester fiber cloth is dyed in a dark color such as blue or black, or when the ultrafine polyester fiber cloth having a single fiber fineness of 1.0 denier or less is dyed. However, in order to dye a deep color, it is necessary to increase the concentration of the dye used, and therefore the dye fixed to the fiber surface may not be sufficiently removed by reduction washing.

Further, even if the excess dye can be removed by reduction washing, drying, curing, etc. after applying the resin,
When the fabric receives heat, the dye fixed inside the fiber moves to the fiber surface, and the dye may cause a decrease in color fastness.

In the present invention, after the polyester fiber cloth is dyed, or if necessary, resin is further applied and then ozone treatment is carried out to decompose and remove only the excess dye fixed to the fiber surface. It is possible to obtain a polyester fiber cloth that does not impair the color development and that does not have a reduction in dyeing fastness even though it is dyed in a dark color without performing reduction washing.

[0031]

The present invention will now be described more specifically with reference to examples. The physical properties described in the examples are measured by the following methods.

(1) Luminous density L * value Macbeth 2020+ (manufactured by Colmogen USA)
Color with a light source D65 and a 10 ° visual field using JIS Z
Brightness index L of UCS color system according to 8730-1980
* The value was calculated.

The smaller the L * value is, the deeper the color is dyed, and the higher the visual density is. The lower limit is about 5 in practical use.

(2) Dye Extraction Amount 1 g of dyed fiber is precisely weighed, put in a 100 ml volumetric flask, then about 90 ml of ethanol is added and left for 1 hour with occasional shaking.

Then, the fiber is taken out from the volumetric flask, and the washing solution is added to the volumetric flask while washing with ethanol, and the volume is adjusted to 100 ml according to the marked line.

Then, using a self-recording spectrophotometer UV2200 (manufactured by Shimadzu Corporation), the absorbance of the above extract (measurement wavelength 5
(50 nm), and the dye concentration per 1 g of fiber (g / g · fiber) is determined from a calibration curve prepared for the dye in advance.

(3) Fastness to Alkaline Sweat 6 The fabric is placed in a moist heat atmosphere at a temperature of 45 ° C. and a humidity of 90% RH for 6 minutes.
JIS L 08
According to Method 48A, the discoloration of the fabric and the degree of staining of the attached white fabric were determined by gray scale.

[Example 1] A polyester multifilament yarn of 75 denier / 36 filaments containing polyethylene terephthalate as a main constituent was arranged on a warp and a weft, and had a flat density of 81 / inch and weft density of 70 / inch. The fabric was woven.

The woven fabric was scoured, relaxed and preset by a conventional method, and then dyed under the following conditions.

(Dyeing conditions) ・ Foron Red S-CTL (manufactured by Sandoz) 8% owf ・ Disper VG (manufactured by Meisei Kagaku) 0.5 g / l ・ Acetic acid 0.3 g / l ・ 130 ° C × 60 minutes

Next, the dyed fabric was subjected to ozone treatment at room temperature under the following conditions without reducing and washing.

(Ozone treatment conditions) -Ozone generator: Silent discharge method (source gas: oxygen) -Ozone concentration: 10,000 ppm-Treatment time: 5 minutes

The resulting fabric was dyed a deep red color and had an L * value of 25.5.

The amount of dye extracted when the polyester fiber constituting the cloth is extracted with ethanol is 0.6 g / g.
It was a fiber, and the alkali sweat fastness after the wet heat deterioration acceleration test was 4-5 grade.

Example 2 The procedure of Example 1 was repeated except that the dye concentration was changed to 14% owf.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration accelerating test, and the amount of dye extracted when the polyester fiber constituting the cloth was extracted with ethanol.

[Example 3] Example 1 except that the dye and its concentration were changed to Foron Blue RD-GLF 4% owf, the ozone concentration was changed to 50,000 ppm, and the treatment time was changed to 1 minute. It carried out similarly to.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration acceleration test, and the amount of dye extracted when the polyester fiber constituting the cloth was extracted with ethanol.

[Example 4] A cationic dyeable polyester multifilament obtained by copolymerizing the polyester multifilament yarn with polyethylene terephthalate as a main constituent and 2.6 mol% sodium 5-sulfoisophthalate component in Example 1 Aize dye on yarn
n Cathilon Blue GRLH (manufactured by Hodogaya Chemical Co., Ltd.), the ozone concentration was changed to 5000 ppm, and the treatment time was changed to 10 minutes.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration acceleration test, and the dye extraction amount when the polyester fibers constituting the cloth were extracted with ethanol.

[Example 5] The procedure of Example 1 was repeated, except that the denier of the polyester multifilament yarn was changed to 64 denier / 144 filaments.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration acceleration test, and the amount of dye extracted when the polyester fiber constituting the cloth was extracted with ethanol.

[Example 6] In Example 1, a 10.0% by weight solution of a fluorine-based water repellent (Asahi Guard AG-730, manufactured by Asahi Glass Co., Ltd.) was padded on the dyed cloth, and the pickup rate was 70%. %, Followed by drying at 130 ° C. for 3 minutes, heat treatment at 170 ° C. for 45 seconds, and ozone treatment.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration accelerating test, and the dye extraction amount when the polyester fibers constituting the cloth were extracted with ethanol.

[Comparative Example 1] The same procedure as in Example 1 was carried out except that the ozone treatment was not carried out and only the reduction washing was carried out twice under the following conditions after dyeing.

(Reduction cleaning conditions) -Hydrosulfite 2 g / l-Caustic soda 2 g / l-Surfactant (amylazine) 2 g / l-80 ° C. × 20 minutes

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration accelerating test, and the dye extraction amount when the polyester fibers constituting the cloth were extracted with ethanol.

[Comparative Example 2] The procedure of Example 1 was repeated except that the ozone treatment was carried out before dyeing.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration accelerating test, and the dye extraction amount when the polyester fibers constituting the cloth were extracted with ethanol.

[Comparative Example 3] The procedure of Example 1 was repeated except that the padding of the fluorine-based water repellent was carried out after the ozone treatment.

Table 1 shows the L * value of the obtained cloth, the alkali sweat fastness after the wet heat deterioration acceleration test, and the amount of dye extracted when the polyester fiber constituting the cloth was extracted with ethanol.

[0062]

[Table 1]

[0063]

EFFECTS OF THE INVENTION According to the present invention, in a polyester fiber cloth having no coating resin layer, a polyester fiber having remarkably improved dyeing fastness, especially alkaline sweat fastness, in spite of the high dye concentration used. A cloth and a manufacturing method thereof can be provided.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location D06M 10/00 D06M 10/00 Z

Claims (5)

[Claims] 1. A cloth mainly composed of dyed polyester fibers and having an L * value of 40 or less has a dye extraction amount of fibers of 2.0 × 10 ⁻⁴ when ethanol is extracted from the polyester fibers constituting the cloth. A polyester fiber fabric having an improved dyeing fastness, characterized in that it is g / g · fiber or less, and that the fastness of alkaline sweat after a wet heat deterioration acceleration test is 4 or higher. 2. The L * value of the fabric is 25 or less.
A polyester fiber fabric having improved dyeing fastness as described above. 3. The monofilament fineness of the polyester fiber is 1.0.
The polyester fiber cloth with improved dyeing fastness according to claim 1 or 2, which has a denier or less. 4. The polyester fiber is a polyester fiber having a resin coating scattered on the surface of the single fiber.
A polyester fiber cloth having an improved dyeing fastness as described in 2 or 3. 5. A process for producing a polyester fiber fabric having an improved dyeing fastness, which comprises dyeing and / or impregnating a fabric mainly composed of polyester fibers and then subjecting the fabric to ozone treatment.