JPH05279971A - Method for dyeing fabric using both polyester yarn and polyurethane yarn - Google Patents

Abstract

PURPOSE:To carry out dyeing having excellent coloring properties free from phenomena of MEMUKI (polyurethane yarn of different color phase is seen in stretching during wearing) by dyeing fabric of mixed yarn of polyester yarn and polyurethane yarn with a specific mixed disperse dye. CONSTITUTION:Fabric of mixed yarn of polyester yarn and polyurethane yarn is dyed by using a non-reaction type disperse dye and a reaction type disperse dye such as a mixed dye of a common disperse dye as a parent material and a dye to which a reaction dye is added through a connecting group at 120-130 deg.C, then reduced and cleaned by a conventional procedure to give a dyed material of fabric of mixed yarn of polyester yarn and polyurethane yarn having excellent coloring properties, fastness, not causing phenomena of MEMUKI.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing a mixed fabric of polyester fiber and polyurethane fiber.

[0002]

2. Description of the Related Art Polyurethane fibers have excellent stretch elasticity and are therefore widely used in the form of cloth such as swimwear, leotards, sports knits and socks when mixed with polyamide fibers and the like. However, polyamide fibers have poor morphological stability and dimensional stability, deterioration of polyurethane due to the use of tannic acid for dyeing, difficulty in obtaining levelness with a metal-containing dye, weak tightening force, yellowing due to gas or light. Occurs, the light fastness and wet fastness are low, and the discoloration due to chlorine water is large.

On the other hand, when the polyester fiber is mixed instead of the polyamide fiber, the problem of polyamide is solved. However, when the polyester disperse dye is used for dyeing, there is a problem in that the disperse dye is excessively dyed on the polyurethane fiber and thus the dyeing fastness is remarkably reduced. Therefore, it is necessary to carry out reduction washing to remove the disperse dye dyed on the polyurethane. However, in such a case, the disperse dye dyed on the polyurethane is reduced and decomposed so that the coloring property is deteriorated, and the polyurethane fiber has a significantly lower color density than the polyester fiber and has a different hue. Therefore, when the fabric is stretched when worn, there is a problem that polyurethane fibers of different hues can be seen and the so-called bleeding phenomenon appears, which significantly reduces the commercial value of the product, and good color development, bleeding, and fastness performance. The current situation is that a mixed fabric of a polyester fiber and a polyurethane fiber has not been obtained.

[0004]

The present invention has been earnestly studied in view of such circumstances, and it has a good coloring property even when dyed with a disperse dye, has no bleeding, and has excellent fastness performance. An object of the present invention is to provide a method for dyeing a good mixed fabric of polyester fiber and polyurethane fiber.

[0005]

The present invention provides a polyester fiber characterized by dyeing a mixed fabric of polyester fiber and polyurethane fiber with a non-reactive disperse dye and a reactive disperse dye at 120 ° C. or higher. This is a method for dyeing a mixed fabric with polyurethane fibers. The polyester fiber of the present invention includes, for example, polyethylene terephthalate, polyoxyethylene benzoate, polybutylene terephthalate,
Alternatively, a fiber obtained by copolymerizing these with other components and modified, a copolymer of the above polyester with sodium isophthalate sulfonate, or a blend of the above polyester with a modifier and dyed with a disperse dye Any polyester fiber can be used.

The polyester fiber used in the present invention has a single fiber fineness of 0.1 to 3d, and a total fineness of 10 to 200d is preferable from the viewpoint of color developability and texture. Further, the single fiber strength is preferably 3.0 to 6.0 g / d from the viewpoint of yarn processing problems such as intertwisting and entanglement and the durability of the fabric. The polyester fibers used in the present invention are not particularly limited to long fibers, short fibers and the like, but long fibers are preferable and bulky processed yarns may be used.

The composition, type, thread usage, etc. of the polyurethane fibers used in the present invention are not particularly limited, and polyether type polyurethane fibers and polyester type polyurethane fibers used for general clothing can be preferably applied. Among them, polyether-based polyurethane fibers having improved chlorine resistance are preferred for swimwear applications. The type of polyurethane fiber can be appropriately selected depending on the application, such as bright type with high clarity or semi-dal type with suppressed gloss. Such type can be controlled by the amount of titanium oxide added.

The proportion of polyurethane fibers mixed with the polyester fibers of the present invention may be appropriately determined depending on the application, but it is preferable to mix polyurethane fibers in an amount of 40% or less. The mixed fabric product of the polyester fiber and the polyurethane fiber of the present invention, in addition to this, wool, cotton,
A small amount of silk, rayon, polyamide fiber, polyacrylic fiber or the like may be mixed. In this case, dyes commonly used for each fiber may be used for dyeing.

The mixed form of the polyester fiber and the polyurethane fiber of the present invention is not particularly limited, but the bare yarn (10 to 500d) of the polyurethane fiber is used as it is, or the coated yarn obtained by winding the polyester fiber around the bare yarn is used. The form is preferred. In the case of a bare yarn, it can be mixed with polyester fibers while being stretched about 2 to 4 times during knitting or weaving. In the case of a coated yarn, it is stretched and processed in the same manner with a usual coating processing machine. Further, as another mixed form, intertwisted, plied yarn, entangled, interwoven, or interwoven may be used. The form of the fabric is not particularly limited, and includes knitted fabric, woven fabric, and non-woven fabric.

The present invention is characterized in that a mixed fabric of polyester fibers and polyurethane fibers is dyed with a non-reactive disperse dye and a reactive disperse dye. By dyeing a mixture of a non-reactive disperse dye and a reactive disperse dye, a polyester fiber and a polyurethane fiber which are good in color developability, have no eye bleeding, and have excellent dyeing fastness performance, which are the objects of the present invention, are obtained. A mixed fabric with is obtained. It is also advantageous in terms of cost. Furthermore, the dyeing method of the present invention can obtain a dyed product with high color reproducibility, and there is little variation in color between dyeing batches.
It also has the feature of improving the operating rate of dyeing machines. When the mixed fabric of polyester fiber and polyurethane fiber is dyed only with the non-reactive disperse dye, the binding force with polyurethane is weak and the dyeing fastness is lowered,
For this reason, reduction cleaning is required, but after reduction cleaning, the problem of peeling off and reduction in color developability becomes a problem. On the other hand, when dyed only with a reactive disperse dye, the binding strength with polyurethane is strong and the dyeing fastness is good. Insufficiency and large amount of dye used, resulting in high cost.

The proportion of the reactive disperse dye to be mixed with the non-reactive disperse dye may be appropriately determined according to the hue and the dyeing density, but it is generally preferable to mix it in the range of 5 to 50%. The non-reactive disperse dye used in the present invention may be any disperse dye that is usually used for dyeing polyester fibers, and is not particularly limited. However, to improve dyeing fastness,
Since it is necessary to remove the non-reactive disperse dye dyed on the polyurethane, it is preferable to use a dye that can be easily reduced and removed during reduction washing, from the viewpoints of dyeing fastness and homogeneity.

The reactive disperse dye used in the present invention is an ordinary disperse dye as a base material, to which a reactive group is added via a linking group, and is generally water-insoluble or represented by the formula (I). It is a water-insoluble dye.

[0013]

[Chemical 1]

In the formula, D represents a dye mother residue, X represents a fluorine atom, an optionally substituted alkyl or aryl group, --OR ¹ group, --SR ¹ group or

[0015]

[Chemical 2]

A group (R ¹ and R ² represent a hydrogen atom or an alkyl group or an aryl group which may have a substituent), and n represents a number of 1 or more. Examples of the base structure of such a disperse dye include those of monoazo type, disazo type, anthraquinone type, nitro type, stilbene type, methine type, azamethine type, polymethine type, verinone type, quinophthalone type and naphthoimine type. In particular, monoazo type, disazo type and anthraquinone type are preferably used. And these dye bases may contain heavy metals as needed.

Examples of the alkyl group corresponding to X in the general formula (I) include lower alkyl groups having 1 to 5 carbon atoms, particularly 1 to 3 carbon atoms, such as methyl group, ethyl group and propyl group, and aryl. A phenyl group is mentioned as a group. Hydrogen atoms of these groups -SO ₃ H group and -CO
Other than the OH group, it may be substituted with, for example, a halogen atom, a nitro group, a cyano group, a hydroxyl group, an alkyl group having 1 to 5 carbon atoms, particularly an alkyl group having 1 to 3 carbon atoms, or an alkoxy group, and an alkyl having such a substituent. Specific examples of the group and the aryl group include a trichloromethyl group and a p-nitrophenyl group.

-OR¹Group, -SR¹Group, (Chemical 2) group
K R¹And R²Has a hydrogen atom or a substituent
Which may be an alkyl group or an aryl group,
R¹, R ²An alkyl group which may have a substituent corresponding to
Examples of the ru and aryl groups are those exemplified above for X.
Is mentioned. Therefore, -OR¹Specifically as a group
Is, for example, hydroxyl group, methoxy group, ethoxy group, 2,
2,2-trifluoropropoxy group, pentoxy
Group, ethoxymethoxy group, β-hydroxyethoxy group
Si group, phenoxy group, p-methylphenoxy group, o-
A nitrophenoxy group etc. are mentioned.

Specific examples of the —SR ¹ group include a thiol group, a methylthio group, an ethylthio group and a phenylthio group. Specific examples of the group (Chemical Formula 2) include a monoalkylamino group such as an amino group, a methylamino group and an ethylamino group, a dialkylamino group such as a dimethylamino group, a β-chloroethylamino group and a β-methoxyethyl group. Examples thereof include an amino group and a γ-hydroxypropylamino group.

Polyester fiber and polyurethane fiber are
After mixing, knitting and weaving, relax, refine and dye.
It is preferable that the scouring is performed at a temperature of 60 to 98 [deg.] C. and relaxed as much as possible in order to enhance the stretch recovery of the cloth. In addition,
170 to 20 for morphological fixation before dyeing
The presetting may be performed by dry heat at a temperature of 0 ° C. Particularly in the case of a cloth such as two-way tricot where curling is a problem, it is preferable to perform dry heat presetting at a high temperature of 190 to 200 ° C.

The dyeing temperature for dyeing the mixed fabric of polyester fiber and polyurethane fiber in the present invention with the non-reactive disperse dye and the reactive disperse dye is 120 ° C. or higher,
The upper limit temperature is up to 130 ° C. The dyeing time is preferably 20 to 40 minutes from the viewpoint of brittleness of polyurethane and cost. The dyeing operation according to the method of the present invention can be carried out by a batch system or a continuous system using a device such as a Wins, Jigger, a beam dyeing machine or a jet dyeing machine. In addition to the dip dyeing, a padding dyeing method or a printing method can be used.

In the dyeing operation according to the method of the present invention, the dyeing conditions other than the dyeing temperature may be any conditions as long as the polyester fibers are usually dyed, and the type and concentration of the dyeing aid, the dyeing pH, the dyeing bath. The ratio, the dyeing time, etc. are appropriately set in consideration of the type of the article to be dyed, the processing equipment used, and the dyeing method. As post-treatment after dyeing, reduction washing with a reducing agent is carried out in order to improve dyeing fastness. Since the fastness performance is almost proportional to the concentration of the non-reactive disperse dye adsorbed on the polyurethane, it is important to reductively decompose and remove the non-reactive disperse dye in the polyurethane. The method described in 60-162889 is preferable because it can be reduced and decomposed and removed in a short time without embrittlement of the spandex. Next, after the reduction cleaning, it may be finished by an ordinary method, but it is preferable to set the final set temperature at 10 ° C. lower than the preset temperature.

If desired, alkali reduction treatment may be carried out before dyeing. When applying alkali reduction treatment, batch method (immersion method), continuous method (pad method)
Regardless of the processing method, it is preferable to carry out the processing at 100 ° C or lower. When the treatment temperature is 100 ° C. or higher, the physical properties of the polyurethane fiber deteriorate.

[0024]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. The evaluation items in the examples were measured as follows. (1) Color development The surface of the cloth after dyeing and reducing and washing is measured with a spectrophotometer (Mac
The L value was measured by "beth2020". The smaller the L value, the better the color developability. (2) Washing fastness It was evaluated according to JIS L-0884. There is no fading,
Good grades were graded 5 and grades were graded one after another (poor grades). (3) Peeling The cloth was stretched about 2 times, and the comparison between the hue density of the polyester fiber and the hue density of the polyurethane fiber was visually determined, and the following grading was performed.

Grade 5: There is almost no difference in hue and density between polyester fiber and polyurethane fiber. Grade 3: Hue of polyester fiber and polyurethane fiber,
There is little difference in density. First grade: hue of polyester fiber and polyurethane fiber,
The concentration difference is extremely high. Example 1 Polyethylene terephthalate 40d / 36f and 40d polyether type polyurethane fibers "Leuca" (registered trademark) B (chlorine resistant type, bright yarn, manufactured by Asahi Kasei Kogyo Co., Ltd.) were used to produce a 36 gauge two-way tricot knitted fabric. (Polyurethane fiber mixture ratio of 24%) was prepared.

The obtained knitted fabric was relaxed and scoured in a spread form at 90 ° C. for 2 minutes, set at 190 ° C. for 30 seconds in a dry heat, and then,
Dyeing was performed using a circular dyeing machine under the following dyeing bath and conditions. Dye bath composition Non-reactive disperse dye (dye that can be easily decomposed and removed from polyurethane during reduction washing) Dynicx Carmine UN-SE (manufactured by Mitsubishi Kasei) 2% owf Dyanix Blue UN-SE (manufactured by Mitsubishi Kasei) 2% owf Reactive disperse dye Red dye of the following structure 0.6% owf

[0027]

[Chemical 3]

Blue dye having the following structure: 0.6% owf

[0029]

[Chemical 4]

Nikkasan Salt RM-340 (manufactured by Nichika Chemical Industry Co., Ltd.) 0.8 g / 1 sodium acetate 0.5 g / 1 acetic acid 0.5 cc / 1 Dyeing temperature × time: 120 ° C. × 40 minutes Bath ratio: 1: 30 After the completion of dyeing, the dyeing residual liquid was discharged from the dyeing machine, water was put into the dyeing machine, the temperature was raised to 80 ° C., and the following chemicals were added thereto to adjust the concentration to the following.

Sodium hydrosulfite 2 g / 1 Caustic soda 2 g / 1 Sunmor RC-700 (Nikaka Kogyo Co., Ltd., nonionic detergent) 1 g / 1 Dimethyl polysiloxane (molecular weight 10,000, kinematic viscosity 300 cSt) 3 g / 1 bath ratio: 1:30 The reduction washing solution was subjected to reduction washing of the dyed product at 80 ° C. for 10 minutes, the residual liquid was discharged, and the dyed product was thoroughly rinsed with warm water and water and then washed. Finished by dry heat set at ℃ × 30 seconds.

The resulting dyed product was evaluated for color developability, washing fastness, and peeling. The results are shown in Table 1. Comparative Example 1 The same knitted fabric as in Example 1 was used, and dyeing was performed in the same manner as in Example 1 except that only the non-reactive disperse dye was dyed. However, the non-reactive disperse dye concentration is 2.
It was set to 6% owf. Table 1 shows the results of the same evaluation of the obtained dyed product. Comparative Example 2 The same knitted fabric as in Example 1 was used, and dyeing was performed in the same manner as in Example 1 except that the reactive disperse dye alone was used for dyeing. However, the concentration of each reactive disperse dye is 2.6.
% Owf. Table 1 shows the results of the same evaluation of the obtained dyed product.

From the results shown in Table 1, it can be seen that the mixed fabric of polyester fiber and polyurethane fiber dyed by the method of the present invention has good color developability and fastness to dyeing, and is of high commercial value without scoring. Recognize.

[0034]

[Table 1]

Industrial Applicability According to the present invention, it is possible to provide a dyeing method capable of obtaining a mixed fabric of polyester fiber and polyurethane fiber which is excellent in color developability, is not blinded, and is excellent in fastness performance. ..

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Claims (1)

[Claims] 1. A dyeing of a mixed fabric of polyester fiber and polyurethane fiber, which comprises dyeing a mixed fabric of polyester fiber and polyurethane fiber with a non-reactive disperse dye and a reactive disperse dye at 120 ° C. or higher. Method.