JP2009091676A - Pretreatment method for dyeing fabric containing polyester fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a general-purpose method that effectively prevents embrittlements such as yellowing, reduction in strength of a polyester fiber and roughening and hardening of feeling which may occur in dry-heat setting of a fabric containing a polyester fiber, and retains excellent quality as a fabric. <P>SOLUTION: The method for pretreating a fabric before dyeing a fabric containing a polyester fiber includes providing a fabric with a treatment liquid containing a sulfonate, attaching 0.05-2.0 wt.% of the sulfonate to the fabric, and dry-heat setting the fabric. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pretreatment method performed on a fabric prior to dyeing a fabric containing polyester fibers. Specifically, the present invention relates to a pre-dyeing treatment method for preventing embrittlement such as yellowing or strength reduction due to heat of polyester fibers and rough hardening of the texture.

  Polyester fibers are widely used not only for clothing but also for industrial use because they are excellent in physical and chemical properties and can be manufactured at low cost. Conventionally, in dyeing processing of polyester fiber fabric, dry heat treatment is performed at a temperature of about 180 ° C. prior to dyeing for the purpose of improving dimensional stability and form stability and preventing wrinkles during dyeing. (The heat treatment performed for such a purpose is called heat set, heat set, or simply set. On the other hand, the properties of the fibers whose shape is fixed (set) by heating are heat set, heat set, Alternatively, it is simply referred to as set property, etc. Hereinafter, the dry heat treatment performed for the above purpose is referred to as “dry heat set”). However, when the polyester fibers reach a high temperature of 180 ° C. or higher, embrittlement such as yellowing and strength reduction and rough hardening of the texture begin to occur, and it becomes difficult to maintain good quality as a fabric. This phenomenon is particularly remarkable in modified polyester fibers such as cationic dye-dyeable polyester fibers.

  On the other hand, in the case of a mixed fabric of polyester fiber and polyurethane fiber, dry heat setting is performed at a higher temperature. That is, in the dry heat setting at a temperature of about 180 ° C., the setting effect is insufficient, and an end winding (curling) or the like is generated at the end of the fabric. This is because a dry heat set at a high temperature of 190 ° C. or higher is required. However, polyester fibers that have been dry-heat set at a high temperature of 190 ° C. or higher are markedly yellowed, and even after dyeing, a clear color cannot be obtained. Moreover, the strength reduction and the rough hardening of the texture are remarkably caused, and the fabric quality is greatly impaired.

  Many methods for improving polyester fibers have been reported for such problems. For example, it is well known that the reaction rate and the quality of the resulting polyester fiber are greatly affected by the type of catalyst used in the polycondensation reaction stage, and an attempt in this regard has been reported. For example, Patent Document 1 discloses that a polyester fiber excellent in thermal stability and whiteness can be obtained by using a combination of an aluminum compound and a phenolic compound or a phosphorus compound as a catalyst. By weaving and knitting polyester fibers and specific polyurethane elastic yarns in combination, polyester stretch woven and knitted fabrics that have excellent fabric properties such as color development, color sharpness, and tear strength, even when set at high temperatures It is described that it is obtained.

  In addition, for cationic dye-dyeable polyester fibers, the inherent strength of the polyester fiber is achieved while imparting cationic dye-dyeability by studying cationic dye-dyeable monomers to be copolymerized and optimizing the amount of copolymerization. A number of methods have been reported (for example, Patent Document 2).

  However, these methods all improve the polyester fiber at the production stage and have a problem of lack of versatility. Also, the effect was not satisfactory.

  The present applicant has so far as a pretreatment method for preventing embrittlement of fabrics containing cellulosic fibers due to heat, and as a pretreatment method for improving dyeability of fabrics containing polyamide fibers. There has been proposed a pretreatment method characterized in that after applying a treatment liquid containing a sulfonate to a fabric, dry heat setting is performed (Patent Documents 3 and 4). However, polyester fibers, in particular regular polyester fibers, are fibers that do not have a functional group, unlike cellulose fibers and polyamide fibers, and are directly converted from methods that are effective in cellulose fibers and polyamide fibers. It is not always possible.

JP 2002-249955 A JP 2006-36953 A JP 2007-39842 A JP 2002-339268 A

  The present invention has been made in view of the current situation, and effectively embrittles and roughens the texture such as yellowing and strength reduction of the polyester fiber, which can occur when a fabric containing the polyester fiber is dry-heat set. An object is to provide a versatile method capable of preventing and maintaining good quality as a fabric.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors attach 0.05 to 2.0% by weight of a sulfonate to a fabric containing polyester fiber, and then set it to dry heat. Thus, it was found that embrittlement such as yellowing and strength reduction of polyester fibers and rough hardening of the texture can be effectively prevented, and good quality as a fabric can be maintained, and the present invention has been completed based on such knowledge. Is.

That is, the present invention is a pretreatment method performed on a fabric prior to dyeing a fabric containing a polyester fiber, and a treatment liquid containing a sulfonate is applied to the fabric, and 0.05 to 2 is applied to the fabric. This is a pretreatment method characterized in that after applying 0.0 wt% sulfonate, dry heat setting is performed.
In the pretreatment method, the treatment liquid preferably further contains a non-volatile acid in addition to the sulfonate.
The treatment liquid preferably further contains a chelating agent in addition to the sulfonate.
The treatment liquid preferably further contains a non-volatile acid and a chelating agent in addition to the sulfonate.
Moreover, it is preferable to perform a dry heat set at the temperature of 180-200 degreeC.
The polyester fiber may be at least one selected from the group consisting of a high-pressure cationic dye-dyeable polyester fiber, an atmospheric pressure cationic dye-dyeable polyester fiber, and an atmospheric pressure disperse dye-dyeable polyester fiber. preferable.
Moreover, it is preferable that a fabric contains a polyurethane fiber in addition to a polyester fiber.

  According to the present invention, it is possible to effectively prevent embrittlement and rough hardening of the texture such as yellowing of the polyester fiber and strength reduction, which can occur when the fabric containing the polyester fiber is set to dry heat, and the fabric has good quality. Can be held. In particular, a remarkable effect appears when dry heat setting is performed at a high temperature of 180 to 200 ° C. for a fabric containing modified polyester fiber as a polyester fiber or a fabric mixed with polyurethane fiber. Since the fabric subjected to the pre-dyeing treatment of the present invention can maintain good whiteness, the dyed product has excellent sharpness.

  In the present invention, the polyester fiber refers to a fiber composed of a polyester in which a dicarboxylic acid and a diol are mainly polymerized by dehydration condensation. Typically, a polyethylene terephthalate, which is a condensate of terephthalic acid and ethylene glycol, terephthalic acid and 1 Polybutylene terephthalate, which is a condensate of 1,4-butanediol, and polytrimethylene terephthalate, which is a condensate of terephthalic acid and 1,3-propanediol, but are not limited thereto. It may be a fiber made of polyester obtained by copolymerizing the component dicarboxylic acid or diol, such as high-pressure cationic dye-dyeable polyester fiber, normal-pressure cationic dye-dyeable polyester fiber, or normal-pressure disperse dye-dyeable polyester. Including modified polyester fibers such as fibers That. These can be used alone or in combination of two or more. Among these, modified polyester fibers are preferable because the effects of the present invention are more effectively exhibited. Specific examples of the modified polyester fiber include high-pressure cationic dye-dyeable polyester fibers such as “Rock I” and “Lock II” manufactured by Toray Industries, Inc., “AHY” manufactured by Mitsubishi Rayon Co., Ltd. ( (Registered trademark), “Lucina” (registered trademark) manufactured by KB Seiren Co., Ltd., “Karafine” (registered trademark) manufactured by Toyobo Co., Ltd., “Lumilet” (registered trademark) manufactured by Toray Industries, Inc., Asahi Kasei Corporation Atmospheric pressure cationic dyeable polyester fiber such as “Technofine” (registered trademark) manufactured by KB Seiren Co., Ltd. “Visar” (registered trademark), “TEC” (registered trademark) manufactured by Asahi Kasei Corporation Normal pressure disperse dyeable dyeable polyester fibers.

The polyester fiber may be either a long fiber or a short fiber depending on the purpose and application. Also, the cross-sectional shape is not particularly limited, and it may be not only a normal round shape but also a flat shape, a triangular shape, a hollow shape, a Y shape, a T shape, a U shape, and the like.
The yarn may be either a filament yarn (long fiber yarn) or a spun yarn (short fiber yarn), or may be a long / short composite spun yarn in which long fibers and short fibers are combined. The filament yarn may be twisted as necessary, or may be imparted with stretchability or bulkiness by false twisting or liquid disturbance treatment.

  In the present invention, the fabric means a woven fabric, a knitted fabric, and a non-woven fabric. The fabric only needs to contain at least polyester fiber, and it is not always necessary to mix other fibers, but fibers other than polyester fiber may be mixed, mixed, twisted, intertwisted, woven, knitted, etc. It may be a combination. The polyester fiber content in the fabric is preferably 30% by weight or more, more preferably 50% by weight or more. There exists a possibility that the outstanding characteristic of polyester fiber may not fully be exhibited as content of a polyester fiber is less than 30 weight%. Thus, it is preferable that the fabric used as object in this invention contains a polyester fiber as main component fibers.

  Other fibers combined with the polyester fiber are not particularly limited, and synthetic fibers such as polyamide, polyacrylonitrile and polyurethane, semi-synthetic fibers such as acetate and triacetate, recycled fibers such as rayon and cupra, natural fibers such as cotton and hemp A fiber etc. can be mentioned, Furthermore, these may be combined 2 or more types. Among these, a combination of polyurethane fibers is preferable because the effects of the present invention are more effectively exhibited.

  The polyurethane fiber refers to a fiber having a urethane bond (—NHCOO—) in a molecular chain. It is known that it is composed of a low melting point soft segment having flexibility and a high melting point hard segment and has excellent elasticity. Depending on the difference in the soft segment, it can be roughly divided into a polyether polyurethane fiber and a polyester polyurethane fiber. In the present invention, any polyurethane fiber can be used and is not particularly limited. Specific examples of polyether polyurethane fibers include “Lycra” (registered trademark) manufactured by Operontex Co., Ltd., “Roika” (registered trademark) manufactured by Asahi Kasei Fibers Co., Ltd., and “Espa” (registered by Toyobo Co., Ltd.). Trademarks), “Fujibo Spandex” (registered trademark) manufactured by Fuji Spinning Co., Ltd., etc., specifically, “Mobilon K” (registered trademark) manufactured by Nisshinbo Co., Ltd., manufactured by Toyobo Co., Ltd. "ACT" (registered trademark).

The use form of the polyurethane fiber is not particularly limited, and the bare fiber (bare yarn) of the polyurethane fiber may be used as it is, and may be combined with other fibers at the stage of fabrication, or at the stage of yarn formation. You may fabricate using what combined with the other fiber.
In the case of using the bare yarn as it is, it can be mixed with other fibers while being stretched about 2 to 4 times during weaving and knitting.
When using yarns in combination with other fibers, covered yarn in which polyurethane fibers are used as core yarns and other fibers are wound in a coil shape, or spun while polyurethane fibers are used as core yarns and other fibers are wound in a sheath shape. Two of the core yarns are typical, but may be in the form of a twisted yarn or entangled yarn. In addition, it is also possible to combine with another fiber at the stage of fabrication.
In the above case, the other fiber combined with the polyurethane fiber may be a fiber other than the polyester fiber, but at the stage of becoming a fabric, the polyester fiber is preferably 30% by weight or more, more preferably It is important to design so that it occupies 50% by weight or more.

  The present invention is a dyeing pretreatment method for a fabric containing polyester fibers as described above, wherein a treatment liquid containing a sulfonate is applied to the fabric, and 0.05 to 2.0% by weight of the sulfonic acid is applied to the fabric. After the salt is attached, it is set by dry heat. The fabric used in the present invention may be subjected to treatment such as scouring by a conventional method.

The sulfonate used in the present invention is preferably an aliphatic sulfonate or an aromatic sulfonate. Specific examples of the aliphatic sulfonate include methane sulfonate and α-olefin sulfonate. Specific examples of the aromatic sulfonate include benzenesulfonate, p-toluenesulfonate, naphthalene-α-sulfonate, naphthalene-β-sulfonate, and the like.
Examples of the salt include alkali metal salts such as lithium, sodium and potassium, ammonium salts, alkanol-substituted ammonium salts such as monoethanol substitution and diethanol substitution.
Moreover, it is preferable that the molecular weight of a sulfonate is 1000 or less. When the molecular weight exceeds 1000, the viscosity of the treatment liquid is high, and there is a possibility that processing spots are generated. Furthermore, there is a possibility that the dyeability may be hindered during dyeing, or the cloth may remain after dyeing and the texture of the fabric may become coarse.
These sulfonates can be used alone or in combination of two or more.

The adhesion amount of the sulfonate to the fabric is required to be 0.05 to 2.0% by weight, and preferably 0.2 to 1.0% by weight. If the adhesion amount of the sulfonate is less than 0.05% by weight, embrittlement such as yellowing and strength reduction of the polyester fiber due to dry heat setting cannot be sufficiently prevented, and the fabric quality may be impaired. is there. Even if the adhesion amount of the sulfonate exceeds 2.0% by weight, an increase in the effect is not recognized and it is not economical. Furthermore, there is a possibility that the dyeability may be hindered during dyeing, or the cloth may remain after dyeing and the texture of the fabric may become coarse.
The concentration of the sulfonate in the treatment liquid and the amount of the treatment liquid applied to the fabric are adjusted so that the amount of the sulfonate attached to the fabric falls within the above range. The specific value of the concentration of the sulfonate in the treatment liquid and the amount of the treatment liquid applied to the fabric are related to each other (if one is larger, the other is smaller), and the treatment liquid is applied to the fabric. It differs greatly depending on the method (described later), and cannot be specified in general. For example, in the case of the padding method, the concentration of the sulfonate in the treatment liquid is usually 0.1 to 10.0% by weight, preferably 1.0 to 5.0% by weight, and the amount of treatment liquid applied to the fabric is usually 5 to 300% by weight, preferably 10 to 200% by weight.

  Here, the treatment liquid is an aqueous solution containing a sulfonate, and other components are not necessarily required, but within a range that does not hinder the effects of the present invention, a pH adjuster, a chelating agent, a scouring agent, if necessary. Arbitrary components such as an agent, an antistatic agent and a softening agent can be used alone or in combination of two or more. Especially, it is preferable to use a pH adjuster (specifically a non-volatile acid) or a chelating agent for the reason mentioned later, and it is more preferable to use both.

  Polyester fibers and polyurethane fibers that are preferably combined with polyester fibers are promoted to be embrittled by being treated at high temperatures under neutral to alkaline conditions. For this reason, for the purpose of preventing embrittlement of the polyester fiber or polyurethane fiber, it is preferable to add a non-volatile acid to the treatment liquid as a pH adjuster. The non-volatile acid is not particularly limited as long as the pH of the treatment liquid can be adjusted to 2.5 to 6.0, and examples thereof include tartaric acid, citric acid, malic acid, and the like. If the pH of the treatment liquid exceeds 6.0, there is a possibility that the polyester fiber or the polyurethane fiber becomes brittle. Even if the pH of the treatment liquid is less than 2.5, polyester fibers (particularly modified polyester fibers) and polyurethane fibers may be embrittled. The concentration of the non-volatile acid necessary to adjust the pH of the treatment liquid to 2.5 to 6.0 is usually 0.01 to 0.3% by weight.

  Further, by adding a chelating agent to the treatment liquid, metal ions such as Fe and Cu which are thermal oxidation promoting substances can be removed, and embrittlement of polyester fiber and polyurethane fiber can be more effectively prevented. . Examples of chelating agents include aminopolycarboxylates, hydroxycarboxylates, polycarboxylates, ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid, and diethylenetriaminepentaacetic acid. The concentration of the chelating agent in the treatment liquid is preferably 0.01 to 0.5% by weight, more preferably 0.03 to 0.3% by weight. If the concentration of the chelating agent is less than 0.01% by weight, the metal ions may not be sufficiently removed. When the concentration of the chelating agent exceeds 0.3% by weight, it is not economical.

  The method for applying the treatment liquid to the fabric is not particularly limited as long as it is a method that can uniformly apply the treatment liquid to the fabric. Can be mentioned.

  In the pre-dyeing treatment method of the present invention, after a treatment liquid containing a sulfonate is applied to a cloth containing polyester fibers, dry heat setting is performed. The dry heat setting temperature at this time is preferably 180 to 200 ° C, more preferably 190 to 200 ° C. If the dry heat setting temperature is less than 180 ° C., the polyester fiber setting effect may be insufficient. In particular, when the fabric is a mixed product of polyester fiber and polyurethane fiber, the temperature is preferably 190 ° C. or higher. If the dry heat setting temperature exceeds 200 ° C., the polyester fiber or polyurethane fiber may become brittle, or the texture may become coarse and hard, and the fabric quality may be impaired.

Thereafter, the fabric subjected to the dry heat setting is dyed by a conventional method using a dye capable of dyeing polyester fibers. Examples of the dye capable of dyeing the polyester fiber include disperse dyes. In the case of a cationic dye-dyeable polyester fiber, it can be dyed with a cationic dye, but it may be dyed with a disperse dye for the purpose of improving level dyeing or deepening.
When the fabric is a mixed product with fibers other than polyester fibers, the fibers other than polyester fibers are dyed in combination with a dye capable of being dyed. At this time, one bath dyeing (same bath dyeing) or two bath dyeing (separate bath dyeing) may be appropriately selected according to the dye to be combined. Examples of the dye capable of dyeing the polyurethane fiber preferably combined with the polyester fiber include a disperse dye and an acid dye. However, since the fastness is not sufficient, the polyurethane fiber is usually not actively dyed. When dyeing mixed products of polyester fibers and polyurethane fibers with disperse dyes, it is necessary to devise measures to suppress dyeing (contamination) to polyurethane fibers and increase dyeing to polyester fibers, such as by increasing the dyeing temperature. .

EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example.
The evaluation of the dyeing pretreatment method of the present invention was performed according to the following method.

[Whiteness]
According to JIS Z 8715, the surface color density of the fabric was measured using a spectrophotometer (CE-3000, manufactured by Gretag Macbeth Co., Ltd.), and the whiteness index (W) was determined. The larger the whiteness index value, the greater the degree of whiteness.

[Texture]
Sensory evaluation by handling was performed, and the determination was made according to the following criteria.
○: Flexible △: Slightly inflexible ×: Hard, not flexible

[Breaking strength and breaking elongation]
Using a tensile tester (Autograph, manufactured by Shimadzu Corporation) in an atmosphere of 20 ° C. and 65% RH, a yarn having a sample length of 200 mm was pulled at a distance of 100 mm between chucks and a speed of 300 mm / min. Time strength and elongation were determined.

[Example 1]
Multifilament yarn of polyester fiber dyeable with normal pressure (“AHY” (registered trademark), 84 dtex / 48f manufactured by Mitsubishi Rayon Co., Ltd.) and bare yarn of polyurethane fiber (manufactured by Asahi Kasei Fibers Co., Ltd.) Tricot knitted fabrics containing "Roika (registered trademark) C804" and 40 dtex) in proportions of 85 wt% and 15 wt%, respectively, were prepared.
This fabric was immersed in a room temperature aqueous solution (pH 7.0) containing 2.0% by weight of sodium benzenesulfonate having a molecular weight of 200 for 5 seconds, then squeezed with a mangle (squeezing rate 40% by weight), and 0.8% with respect to the fabric. After adhering weight% sodium benzenesulfonate, dry heat setting was performed at 195 ° C. for 3 minutes. The whiteness of the fabric in this state was measured.
Subsequently, Dianix Blue HF-2G (manufactured by Dystar Japan Co., Ltd., CI Disperse Blue 165-1) as a disperse dye is 2.0% by weight based on the fabric, and acetic acid as a pH adjuster is 0.5 cc / l, It dye | stained for 60 minutes at 120 degreeC with the dyeing liquid (pH 4.0) which contains 0.5 g / l of Nikka sun salt 8000 (made by Nikka Chemical Co., Ltd.) as a leveling agent. Then, after reducing and cleaning by a conventional method, it was dried at 150 ° C. for 30 seconds. The texture was evaluated about the obtained dyed fabric. Moreover, the multifilament yarn of the normal pressure cationic dyeable polyester fiber was taken out, and the breaking strength and breaking elongation were measured.

[Example 2]
Pre-dyeing in the same manner as in Example 1 except that a normal temperature aqueous solution (pH 3.0) containing 2.0% by weight of sodium benzenesulfonate having a molecular weight of 200 and 0.05% by weight of tartaric acid was used as the pre-dyeing treatment solution. A treated cloth and a dyed cloth were obtained.

[Example 3]
Before dyeing as in Example 1, except that a normal temperature aqueous solution (pH 6.5) containing 2.0% by weight of sodium benzenesulfonate having a molecular weight of 200 and 0.05% by weight of EDTA was used as a pretreatment for dyeing. A treated cloth and a dyed cloth were obtained.

[Example 4]
Implementation was performed except that a room temperature aqueous solution (pH 3.1) containing 2.0% by weight of sodium benzenesulfonate having a molecular weight of 200, 0.05% by weight of tartaric acid, and 0.05% by weight of EDTA was used as a pretreatment for dyeing. In the same manner as in Example 1, a pre-dyed cloth and a dyed cloth were obtained.

[Example 5]
A normal temperature aqueous solution (pH 3.0) containing 0.2% by weight of sodium benzenesulfonate having a molecular weight of 200, 0.05% by weight of tartaric acid, and 0.05% by weight of EDTA is used as a pre-dyeing treatment solution. A pre-dyed cloth and a dyed cloth were obtained in the same manner as in Example 1 except that 0.08% by weight of sodium benzenesulfonate was adhered.

[Example 6]
A normal temperature aqueous solution (pH 3.4) containing 4.0% by weight of sodium benzenesulfonate having a molecular weight of 200, 0.05% by weight of tartaric acid, and 0.05% by weight of EDTA is used as a pre-dyeing treatment solution. A pre-dyed cloth and a dyed cloth were obtained in the same manner as in Example 1 except that 1.6% by weight of sodium benzenesulfonate was adhered.

[Comparative Example 1]
A dyed pretreated cloth and a dyed cloth were obtained in the same manner as in Example 1 except that room temperature water (pH 7.0) was used as the dyeing pretreated liquid.

[Comparative Example 2]
A pre-dyeing cloth and a dyeing cloth were obtained in the same manner as in Example 1 except that a normal temperature aqueous solution (pH 3.0) containing 0.05% by weight of tartaric acid was used as the pre-dying liquid.

[Comparative Example 3]
A pre-dyeing cloth and a dyeing cloth were obtained in the same manner as in Example 1 except that a room temperature aqueous solution (pH 6.5) containing 0.05% by weight of EDTA was used as the pre-dyeing treatment liquid.

[Comparative Example 4]
A normal temperature aqueous solution (pH 3.0) containing 0.1% by weight of sodium benzenesulfonate having a molecular weight of 200, 0.05% by weight of tartaric acid, and 0.05% by weight of EDTA is used as a pre-dyeing treatment solution. A pre-dyed cloth and a dyed cloth were obtained in the same manner as in Example 1 except that 0.04% by weight of sodium benzenesulfonate was adhered.

[Comparative Example 5]
A normal temperature aqueous solution (pH 3.6) containing 8.0% by weight of sodium benzenesulfonate having a molecular weight of 200, 0.05% by weight of tartaric acid, and 0.05% by weight of EDTA is used as a pre-dyeing treatment solution. A pre-dyed cloth and a dyed cloth were obtained in the same manner as in Example 1 except that 3.2% by weight of sodium benzenesulfonate was adhered.

[Example 7]
Regular filament (polyethylene terephthalate) fiber multifilament yarn (“Tetron” manufactured by Teijin Ltd., 56 dtex / 36f) and polyurethane fiber bare yarn (Asahi Kasei Fibers Co., Ltd. “Roika (registered trademark) C804”, 40 dtex) Tricot knitted fabrics containing 85% by weight and 15% by weight, respectively, were prepared.
This fabric was immersed in a normal temperature aqueous solution (pH 3.1) containing 2.0% by weight of sodium benzenesulfonate having a molecular weight of 200, 0.05% by weight of tartaric acid, and 0.05% by weight of EDTA, and then in a mangle. After drawing (with a drawing rate of 40% by weight) and 0.8% by weight of sodium benzenesulfonate on the fabric, dry heat setting was performed at 195 ° C. for 3 minutes. The whiteness of the fabric in this state was measured.
Subsequently, Dianix Blue HF-2G (manufactured by Dystar Japan Co., Ltd., CI Disperse Blue 165-1) as a disperse dye is 2.0% by weight based on the fabric, and acetic acid as a pH adjuster is 0.5 cc / l, It dye | stained for 30 minutes at 135 degreeC with the dyeing liquid (pH 4.0) containing 0.5 g / l of Nikka sun salt 8000 (made by Nikka Chemical Co., Ltd.) as a leveling agent. Then, after reducing and cleaning by a conventional method, it was dried at 150 ° C. for 30 seconds. The texture was evaluated about the obtained dyed fabric. Moreover, the multifilament yarn of regular polyester fiber was extracted, and the breaking strength and breaking elongation were measured.

[Comparative Example 6]
A pre-dyeing cloth and a dyeing cloth were obtained in the same manner as in Example 7 except that room-temperature water (pH 7.0) was used as the pre-dying treatment liquid.

  Table 1 shows the results of evaluating the pre-dyed cloth and the dyed cloth obtained in the above Examples and Comparative Examples.

Claims (7)

  Prior to dyeing a fabric containing a polyester fiber, a pretreatment method for the fabric, wherein a treatment liquid containing a sulfonate is applied to the fabric, and 0.05 to 2.0% by weight of sulfone is applied to the fabric. A pretreatment method comprising dry heat setting after an acid salt is adhered.   The pretreatment method according to claim 1, wherein the treatment liquid further contains a non-volatile acid in addition to the sulfonate.   The pretreatment method according to claim 1, wherein the treatment liquid further contains a chelating agent in addition to the sulfonate.   The pretreatment method according to claim 1, wherein the treatment liquid further contains a non-volatile acid and a chelating agent in addition to the sulfonate.   The pretreatment method according to any one of claims 1 to 4, wherein the dry heat set is performed at a temperature of 180 to 200 ° C.   The polyester fiber is at least one selected from the group consisting of a high-pressure cationic dye-dyeable polyester fiber, an atmospheric pressure cationic dye-dyeable polyester fiber, and an atmospheric pressure disperse dye-dyeable polyester fiber. The pretreatment method according to any one of claims 1 to 5.   The pretreatment method according to any one of claims 1 to 6, wherein the fabric further includes a polyurethane fiber in addition to the polyester fiber.