JP2884132B2 - Polyester fiber fabric having imprint and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber fabric having a printed pattern and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, in printing of a fabric composed of a modified polyester fiber and an unmodified polyester fiber,
I. B. Printing with a cationic dye or acid dye, heat treatment to color the modified polyester fiber dyeable with a cationic dye or acid dye, and leave the unmodified polyester fiber uncolored as a white print; Printing is known in which a cationic dye and a disperse dye are simultaneously printed, a modified polyester fiber dyeable with the cationic dye is colored with the cationic dye and the disperse dye, and an unmodified polyester fiber is colored with the disperse dye.

[0003]

However, in the printing of (a), since the number of yarn types of the modified polyester fiber is overwhelmingly smaller than that of the unmodified polyester fiber, the visual and texture expression of the fabric is restricted, and the versatility is increased. It lacks. Further, in the printing of (b), it is impossible to obtain different clear hues or two hues having a complementary color relationship such as red and blue because the modified polyester fiber becomes a compound color of the cationic dye and the disperse dye. The present invention solves the above-mentioned conventional problems, and has an aesthetic texture, and has an aesthetic pattern having a pattern portion with a white residue and a different color pattern portion with two distinct hues or complementary hues having different hues. An object of the present invention is to provide a polyester fiber fabric having a printed pattern.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for fabricating a polyester resin having a pattern portion made of an unmodified polyester fiber colored with a disperse dye and a pattern portion made of a modified polyester fiber dyeable with a cationic dye which is uncolored with a disperse dye. Or a polyester fiber cloth having a printed pattern characterized by having a patterned part and / or a non-patterned part of a cationic polyester dyeable modified polyester fiber colored in a different color only with a cationic dye, and The present invention relates to a method for producing a polyester fiber cloth having a printed pattern comprising the steps of: (A) A step of printing a fabric composed of a modified polyester fiber dyeable with a cationic dye and an unmodified polyester fiber with a disperse dye to form a pattern portion (b) Coloring modified polyester fiber by treating with a heated alkali aqueous solution Or (c) a step of printing or dyeing with a cationic dye to color the modified polyester fiber of the pattern and / or non-pattern in a different color.

[0005] In the present invention, a fabric comprising a modified polyester fiber and an unmodified polyester fiber is a knitted fabric comprising a mixed yarn of a modified polyester fiber dyeable with a cationic dye and an unmodified polyester fiber, or a twisted yarn. , Woven or knitted or woven fabrics.

In general, the modified polyester fiber is a fiber made of a polyester obtained by copolymerizing a component copolymerizable with ethylene terephthalate in a range of 15 mol% or less in a repeating unit of ethylene terephthalate. Aromatic, aliphatic or alicyclic dicarboxylic acids such as isophthalic acid, hexahydroterephthalic acid, adipic acid, sebacic acid, azelaic acid, etc., tricarboxylic acids such as trimellitic acid, diethylene glycol, tetramethylene glycol, hexa Examples thereof include diols such as methylene glycol, hexanediol, bisphenol A, and bisphenol F. In order to improve the dyeability of a specific dye, a copolymer component serving as a dyeing site is further copolymerized.

The modified polyester fiber used in the present invention is obtained by copolymerizing 5-sodium sulfoisophthalic acid having a dyeing site for a cationic dye and an aliphatic dicarboxylic acid having up to 20 carbon atoms such as adipic acid and sebacic acid. It is a modified polyester fiber dyeable with a cationic dye made of polyester, and more preferably 1.5-4.0 mol% of 5-sodium sulfoisophthalic acid and 3.0-7.0 mol% of adipic acid are copolymerized. It is a cationic dyeable modified polyester fiber made of polyester. Hereinafter, the modified polyester fiber dyeable with a cationic dye is simply referred to as a modified polyester fiber.

The unmodified polyester fiber used in the present invention refers to a polyester fiber whose main repeating unit is ethylene terephthalate and the copolymer component is 0.5 mol% or less, and polyethylene terephthalate fiber is preferably used.

A polyester fiber cloth having a pattern portion composed of an unmodified polyester fiber colored with a disperse dye and a modified polyester fiber uncolored with a disperse dye is obtained through the following steps in order. The first step is a step of printing a fabric composed of modified polyester fibers and unmodified polyester fibers with a disperse dye to color the modified polyester fibers and unmodified polyester fibers to form a pattern. In this step, a pattern portion is formed on a fabric composed of modified polyester fibers and unmodified polyester fibers by printing a printing paste containing a disperse dye on a predetermined pattern pattern by any method such as a screen printing method. I do.

For printing with disperse dyes, monoazo, disazo, anthraquinone, aminoquinone, nitrodiphenylamine and other disperse dyes are dyed at 90 to 140 ° C. on a modified polyester fiber and heated with alkali. It is preferable to use a dye which easily escapes from the inside of the modified polyester fiber in the aqueous solution, alone or in combination.

Examples of the paste used for the printing paste include natural, processed, semi-synthetic, and synthetic pastes such as wheat starch, tragacanth gum, locust bean gum, carboxymethylcellulose, polyvinyl alcohol, and sodium polyacrylate. After printing, a pattern portion is formed by performing heat treatment with dry heat, high-temperature steam, high-pressure steam, or the like under ordinary printing conditions. After printing and heat treatment, it is desirable to carry out reduction washing with hydrosulfite or the like in order to obtain a clear color.

Next, the second step is a step of decolorizing the colored modified polyester fiber by treating with a heated alkaline aqueous solution. In this step, the fabric printed with the disperse dye is immersed in a heated alkaline aqueous solution to decolor the denatured modified polyester fiber in the pattern portion. By the treatment with the heated alkaline aqueous solution, the modified polyester fiber colored with the disperse dye is decolorized among the modified polyester fiber and the unmodified polyester fiber that are both colored with the disperse dye in the pattern portion, and the unmodified polyester fiber that is colored with the disperse dye. The fibers remain intact. Accordingly, the pattern portion is formed only by coloring the portion of the unmodified polyester fiber while leaving the portion of the modified polyester fiber white.

In the present invention, the treatment with a heated alkali aqueous solution is carried out using an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide, an alkaline earth metal hydroxide such as magnesium hydroxide or calcium hydroxide as an alkali compound.
Using amines such as triethanolamine, diethanolamine, monoethanolamine and the like, the aqueous solution temperature is 80 to 120 ° C., preferably 90, when the aqueous alkali concentration is not more than 500 g / l, preferably not more than 40 g / l.
Impregnation is carried out by a pad method, a dipping method or the like at a temperature of up to 110 ° C. The degree of the alkali treatment is that the unmodified polyester fiber colored with the disperse dye is not decolorized, and only the decolorization of the modified polyester fiber colored with the disperse dye needs to be achieved. The weight loss rate is 0.5 to 50 wt%, preferably 5 to 25 wt%.
The range is as follows.

When the alkali concentration exceeds 500 g / l,
When the hydrolysis of the modified polyester fiber proceeds too much, the fiber strength decreases, and when the temperature is less than 80 ° C., the disperse dye from the colored modified polyester fiber cannot be sufficiently discolored due to low discharge, and exceeds 120 ° C. Then, the hydrolysis of the modified polyester fiber proceeds rapidly, and it becomes difficult to control the weight loss rate.

In the treatment with a heated alkali aqueous solution according to the present invention, the modified polyester fiber is easier to absorb the dispersed dye molecules than the unmodified polyester fiber because the fiber structure of the amorphous portion is loose. Expulsion of the dye molecules incorporated into the fibers also readily occurs. Dye molecules discharged from the modified polyester fiber are decomposed by alkali and decolorized, or re-dyed by high pH. In the modified polyester fiber, since the fiber structure of the amorphous portion is loose, the alkali easily penetrates similarly to the disperse dye molecule, so that the decoloration easily occurs.

In order to prevent the disperse dye molecules that have once escaped from the modified polyester fiber from adsorbing to the modified polyester fiber again during decolorization with a heated alkaline aqueous solution, it is necessary to actively oxidize or reduce the discharged dye molecules. Desirably, an aqueous alkaline solution, hydrosulfite,
It is preferable to add hypochlorous acid, chlorous acid, perchloric acid, hydrogen peroxide, potassium permanganate, etc., and the use of hydrosulfite is particularly effective. In the use of hydrosulfite, the concentration of hydrosulfite is set to 30 g / l or less, preferably not exceeding 20 g / l.

Further, the handle portion of the unmodified polyester fiber colored by the disperse dye of the present invention and the handle portion of the modified polyester fiber colored differently only by the cationic dye and / or
Alternatively, the polyester fiber cloth having a non-pattern portion is obtained through the following third step. The third step is a step of printing or dyeing with a cationic dye to color the modified polyester fiber of the pattern portion and / or the non-pattern portion in a different color. That is, in this step, a cloth having a pattern portion of a modified polyester fiber whose color is decolorized and an unmodified polyester fiber colored with a disperse dye is screen-printed with a printing paste containing a cationic dye on a predetermined pattern. Or by dyeing with a dye solution containing a cationic dye, or by dyeing with a pad or the like.

In printing with a cationic dye, a printing paste containing the cationic dye may be printed on the non-pattern portion independently of the handle portion of the disperse dye print, or the handle portion of the disperse dye print may be printed. May be overlapped or printed so as to match or include all of them, or by printing with an arbitrary combination of pattern and color. As a sizing agent at the time of printing, the same natural, processed, semi-synthetic or synthetic sizing agent as that used at the time of printing with a disperse dye is used. After printing, the pattern is formed by heat treatment with dry heat, high-temperature steam, high-pressure steam, or the like.

In the printing or dyeing with a cationic dye, the cationic dye to be used is not particularly limited, and may be used alone or in combination. The printing may be performed by printing a printing paste containing the cationic dye on a pattern as appropriate. Heat treatment is performed under normal printing conditions such as high-temperature steam and high-pressure steam. As the paste for the printing paste, any paste of natural, processed, semi-synthetic or synthetic is used. Dyeing is carried out with a dyeing solution containing a cationic dye under ordinary dyeing conditions at 80 to 100 ° C. In such printing or dyeing, the decolorized or uncolored modified polyester fiber of the pattern portion of the fabric is colored with the cationic dye. At the time of printing or dyeing with a cationic dye, the modified polyester fiber is colored differently from the hue with the disperse dye. In printing and dyeing, it is desirable to perform reduction washing with hydrosulfite or the like after printing, heat treatment or after dyeing and washing to obtain a clear color.

By printing or dyeing with such a cationic dye, the unmodified polyester fiber is not colored with the cationic dye, and the modified polyester fiber is partially dyed by printing and entirely dyed by the cationic dye alone. It is colored vividly. Therefore, the unmodified polyester fiber is a disperse dye, and the modified polyester fiber is a cationic dye, to obtain a polyester fiber cloth having a pattern portion independently colored or appropriately combined with each other.

[0021]

The present invention will be described below in more detail with reference to examples.

(Example 1) Modification of dyeability of cationic dye consisting of polyester in which the main repeating unit is ethylene terephthalate and copolymerized with 2.25 mol% of 5-sodium sulfoisophthalic acid and 5.0 mol% of adipic acid Polyester fiber (75d / 48f) and polyethylene terephthalate fiber (75d / 36f) with 120T twist
A 24G plain knitted fabric was knitted using the yarn twisted at / M.
On this knitted fabric, using a printing paste containing the following disperse dye, screen-printing a pattern, drying at 100 ° C. for 2 minutes,
The mixture was subjected to high-temperature steam treatment at 80 ° C. for 90 seconds, washed with water, and reduced and washed with the following reducing solution.

Next, the knitted fabric printed with the disperse dye is subjected to a bath ratio of 1: 3.
When immersed in a boiling alkaline aqueous solution of a 15 g / l aqueous solution of sodium hydroxide for 50 minutes, 5 g / l of hydrosulfite was introduced into the liquid, immersed in boiling for another 5 minutes, and washed with water. At this time, the weight reduction rate of the knitted fabric was 21% by weight. By this alkali treatment, the denatured polyester fiber colored with the disperse dye in the pattern portion of the printed knitted fabric was completely decolorized. The obtained knitted fabric was an aesthetically patterned knitted fabric having a pattern in which polyethylene terephthalate fibers were clearly colored blue with a disperse dye, with the modified polyester fibers remaining white.

Disperse dye printing paste: Dyanix Brilliant Blue A5R-FS 1 part by weight (Mitsubishi Kasei Co., Ltd. disperse dye) Fine gum G-17 (Daiichi Kogyo Co., Ltd., guar gum paste) 6 parts by weight Water 93 parts by weight Reduction Liquid: Bath ratio 1:30 Hydrosulfite 1 g / l Sodium carbonate 1 g / l Monogen (Daiichi Kogyo Co., Ltd. detergent) 1 g / l

(Example 2) Using the pattern knitted fabric obtained in Example 1, a printing paste containing the following cationic dye was partially superimposed on a pattern printed with a disperse dye to screen-print the pattern. After printing, it was dried at 100 ° C. for 2 minutes, subjected to high-temperature steam treatment at 150 ° C. for 90 seconds, washed with water, and reduced and washed as in Example 1. In the obtained knitted fabric, the modified polyester fiber is left white, the pattern pattern in which only the polyethylene terephthalate fiber is clearly colored blue with the disperse dye, the polyethylene terephthalate fiber is left white, and only the modified polyester fiber is the cationic dye and red. In the aesthetic color change having a patterned pattern in which the colored pattern and the polyethylene terephthalate fiber in the overlapping portion of these patterned patterns are colored blue with the disperse dye and the modified polyester fiber is colored red with the cationic dye It was a rich knitted fabric.

Cation dye printing paste: Kayacryl Red 2BL-ED 1 part by weight (cationic dye manufactured by Nippon Kayaku Co., Ltd.) Fine gum G-17 6 parts by weight Water 93 parts by weight

(Example 3) Using the patterned knitted fabric obtained in Example 1, a printing paste containing the same cationic dye as used in Example 2 and a patterned pattern printed with a disperse dye as a part thereof. After covering and overlapping and printing the pattern on the screen, 1
It was dried at 00 ° C. for 2 minutes, subjected to high-temperature steam treatment at 150 ° C. for 90 seconds, washed with water, and reduced and washed as in Example 1.
In the obtained knitted fabric, the polyethylene terephthalate fiber is colored white with the disperse dye in the pattern pattern in which the polyethylene terephthalate fiber remains white, and only the modified polyester fiber is colored red with the cationic dye. The knitted fabric was rich in aesthetic color change and had a pattern that was colored red with a dye.

(Example 4) Using the patterned knitted fabric obtained in Example 1, a printing paste containing the same cationic dye as used in Example 2 was applied independently of a patterned pattern printed with a disperse dye. After screen printing on the pattern, it was dried at 100 ° C. for 2 minutes, subjected to high-temperature steam treatment at 150 ° C. for 90 seconds, washed with water, and reduced and washed as in Example 1. The obtained knitted fabric is
An aesthetic having a pattern pattern in which polyethylene terephthalate fibers are left white and only the modified polyester fibers are colored red with a cationic dye and a modified polyester fiber is white and a pattern pattern in which only polyethylene terephthalate fibers are colored blue with a disperse dye It was a knitted fabric rich in typical color change.

(Example 5) Using the patterned knitted fabric obtained in Example 1, using a dye solution of the following cationic dye, the temperature was raised from room temperature at a rate of 2 ° C / min, followed by dyeing under boiling for 30 minutes. , Washed with water,
Thereafter, reduction cleaning was performed in the same manner as in the case of printing in Example 1. The resulting dyed knitted fabric is a non-patterned part other than the patterned pattern in which the modified polyester fiber is dyed red with a cationic dye, and the polyethylene terephthalate fiber is colored blue with a disperse dye, and the modified polyester fiber is The knitted fabric had a vivid aesthetic color change having a patterned pattern dyed red with a cationic dye.

Cation dye dyeing liquid: Kayacryl Red 2BL-ED 1% (based on fiber weight) (Cation dye manufactured by Nippon Kayaku Co., Ltd.) Disper TL (Dispersant manufactured by Meisei Chemical Co., Ltd.) 0.5 g / l Disper VG (Meisei Chemical Co., Ltd.) Dispersant 0.5 g / l Ultra MT-N2 (phosphate compound manufactured by Minejima Chemical Co.) 0.5 g / l Bath ratio 1:30

(Comparative Example) A modified polyester fiber (75d / 48f) composed of a polyester whose main repeating unit is ethylene terephthalate and copolymerized with 2.25 mol% of 5-sodium sulfoisophthalic acid, and a polyethylene terephthalate fiber (75d / 36f) ) With a twist of 120
A 24G flat knitted fabric was knitted using the yarn twisted at T / M. This knitted fabric was printed with a disperse dye, heat-treated and reduced and washed in the same manner as in Example 1, then treated with a heated alkaline aqueous solution and washed with water as in Example 1. The resulting knitted fabric had insufficient decolorization of the modified polyester fiber colored with the disperse dye in the handle portion, and had a fuzzy pattern.

Further, the obtained knitted fabric was further subjected to Example 2
In the same manner as described above, a cationic dye was printed, heat-treated, and reduced and washed. In the obtained knitted fabric, the modified polyester fiber of the pattern portion of the printing of the cationic dye which overlaps with the pattern portion of the printing of the disperse dye becomes a compound color of the disperse dye and the cationic dye,
Furthermore, it became a knitted fabric with an unclear pattern.

[0033]

According to the present invention, the modified polyester fiber which can be dyed with a cationic dye and the unmodified polyester fiber which have not been obtained by the conventional printing method of polyester fiber are mixed with a disperse dye and a cationic dye, respectively. Rather, the present invention can provide a polyester fiber cloth which can express a pattern having the hue of each of the dyes independently, and has a clear, aesthetically pleasing printed pattern with rich color change. Also, when combined with an arbitrary ground dyeing of the fabric, a polyester fiber fabric having a more aesthetic print can be obtained.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D06P 3/52-3/54 D06P 3/854

Claims (4)

(57) [Claims] 1. A polyester fiber fabric having a printed pattern, characterized by having a pattern portion comprising an unmodified polyester fiber colored with a disperse dye and a modified polyester fiber dyeable with a cationic dye which is uncolored with a disperse dye. . 2. It has a handle portion of an unmodified polyester fiber colored with a disperse dye and a handle portion and / or a non-pattern portion of a cationic dye dyeable modified polyester fiber colored in a different color only with a cationic dye. A polyester fiber fabric having a printed pattern characterized by the following. 3. A method for producing a polyester fiber cloth having a printed pattern, comprising the following sequential steps. (A) A step of printing a cloth composed of a modified polyester fiber and an unmodified polyester fiber which are dyeable with a cationic dye with a disperse dye to color the modified polyester fiber and the unmodified polyester fiber to form a pattern portion (b) Step of decolorizing colored modified polyester fiber by treatment with heated alkaline aqueous solution 4. A method for producing a polyester fiber cloth having a printed pattern, comprising the following sequential steps. (A) A step of printing a cloth composed of a modified polyester fiber and an unmodified polyester fiber which are dyeable with a cationic dye with a disperse dye to color the modified polyester fiber and the unmodified polyester fiber to form a pattern portion (b) A step of decolorizing the colored modified polyester fiber by treatment with a heated alkaline aqueous solution (c) A step of printing or dyeing with a cationic dye to color the modified polyester fiber of the pattern and / or non-pattern in a different color