JP3276090B2 - Method for producing polyester-based fabric - 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 having a natural appearance, an excellent airy feeling, an appropriate elasticity and an appropriate firmness and waist, and which can be suitably used as a material for women's clothing, for example. The present invention relates to a method for producing a base fabric.

[0002]

2. Description of the Related Art As a method for producing a polyester-based fabric having a peach-like feeling, the present applicant has filed Japanese Patent Application No. Hei 4-356887.
In the issue, the following method is proposed. That is,
High-stress, high-shrinkage polyester fine fiber and low-shrinkable ultrafine fibers are combined with a split-type polyester fiber by means of confounding or other means. To obtain a woven fabric. Then, the cloth is subjected to an appropriate treatment to divide the split-type polyester-based fibers to generate ultrafine fibers and to shrink the polyester-based fineness fibers. As a result, the ultrafine fibers become apparent on the surface, exhibiting a peach-like feeling, and the resulting fabric is given a firmness and stiffness due to shrinkage of the polyester-based fineness fibers.

[0003] However, the polyester fabric obtained by such a method has a high fabric density due to the shrinkage of the polyester-based fineness fibers, hardens the feeling and gives a heavy feeling. Therefore, for example, there is a drawback in that it lacks an airy feeling and an appropriate elasticity, which are regarded as most important as materials for women's clothing.

[0004]

Accordingly, the present invention is based on the invention in Japanese Patent Application No. 4-356887, in which a high shrinkage polyester-based fine fiber having a specific latent crimpability is used. By imparting such characteristics, the obtained polyester-based fabric is intended to have a natural appearance, an excellent airy feeling, an appropriate elasticity, and an appropriate firmness and waist.

[0005] In the invention according to Japanese Patent Application No. 3-166336, stretchable peach-like knitting is performed by using a yarn made of latently crimpable polyester fiber and a yarn made of split polyester fiber. There are known ways to get the land. But,
This method knits a double knitted fabric without blending the latently crimpable polyester fiber and the splittable polyester fiber, each as a separate yarn, and then forms the latently crimpable polyester fiber. It is intended to impart crimp to the resulting knitted fabric by expressing crimp. That is, Japanese Patent Application No. 3-1663
The invention according to No. 36 is, as in the present invention, by blending a latently crimpable polyester fiber and a splittable polyester fiber to obtain an appearance having a natural feeling, an excellent airy feeling, and a moderate It is not intended to give a proper elasticity and a moderate elasticity and waist.

[0006]

That is, the present invention provides the following:
(1) Latent crimping conjugated polyester fiber satisfying the requirements of (3) and a mixed fiber yarn obtained by blending a splittable polyester fiber satisfying the following (4) to (8) requirements: And knitting and weaving to obtain a fabric, and thereafter subjecting the splittable polyester fiber to a splitting treatment, shrinking the latently crimpable conjugated polyester fiber and expressing crimp, and fabric The present invention relates to a method for producing a polyester-based fabric, characterized in that the polyester-based fabric is dyed. (1) The latently crimpable conjugated polyester fiber has a boiling water shrinkage of 20% or more. (2) The latently crimpable conjugated polyester fiber has a boiling water of 30%.
The elastic modulus after dispensing must be 70% or more. (3) The latently crimpable composite polyester fiber has a boiling water of 30%.
Crimp rate after dispensing is 50% or more. (4) The split polyester fiber is formed by joining a plurality of polyester ultrafine fibers. (5) The plurality of ultrafine polyester fibers are bonded by a polyester bonding agent. (6) The alkali solubility of the polyester-based bonding agent is greater than that of the polyester-based ultrafine fibers. (7) The fineness of the polyester microfiber is 0.05 to 0.5 denier. (8) The polyester microfiber has a boiling water shrinkage of 10% or less.

First, the latently crimpable conjugated polyester fiber used in the present invention will be described. The latently crimpable conjugated polyester fiber is a combination of a polyester-based first component and a polyester-based second component having a different boiling water shrinkage rate from the polyester-based first component. The combination must be such that the fibers are crimped in a spiral shape or the like due to the difference in boiling water shrinkage between the first component and the second component. Specifically, they are combined in a side-by-side type or an eccentric core-sheath type. The latently crimpable conjugated polyester fiber has a predetermined boiling water shrinkage rate as a whole, as described later. In addition, the single-filament fineness of the latently crimpable composite polyester fiber is about 1 to 5 denier,
Particularly preferably, those having a denier of 1.5 to 2 are used.

In the present invention, the latent crimping conjugated polyester fiber must have a boiling water shrinkage of at least 20%, particularly preferably 35 to 55%. If the boiling water shrinkage is less than 20%, the resulting fabric will have a reduced firmness and stiffness, resulting in reduced elasticity and swelling. Here, the measuring method of the boiling water shrinkage is as follows. That is, once the fiber is fixed, an initial load of 1/10 (g / d) is applied to the other end, 500 mm is correctly measured, and two points are marked.
After this, after taking the initial load and immersing in boiling water for 30 minutes,
Take out, lightly blot with blotter paper or cloth, and air dry horizontally. Thereafter, an initial load is applied again to obtain a length lmm between the two points. The above measurement of lmm is performed ten times, and the shrinkage is calculated by the formula [(500-1) / 500] × 100, and the average value is defined as the boiling water shrinkage (%).

The modulus of elasticity of the latently crimpable conjugated polyester fiber after the treatment with boiling water for 30 minutes is 70% or more.
Then, the crimp ratio after the treatment with boiling water for 30 minutes is 50% or more.
If the elastic modulus after the treatment with boiling water for 30 minutes is less than 70%, or the crimping ratio after the treatment with boiling water for 30 minutes is less than 50%, the elasticity imparted to the obtained fabric is reduced, or It is not preferable because the feeling is reduced. Here, the elastic modulus after the boiling water treatment for 30 minutes is measured by the following method. That is, the latently crimpable composite polyester fiber squeezed five times with a measuring machine was doubled, suspended on a stand with a load of 1/6000 (g / d), and further 1/10 (g / d), and then left for 30 minutes while applying a load of 1/6000 (g / d), and then place in boiling water for 30 minutes while maintaining this state. Then, air-dry for 30 minutes, apply a load of 1/500 (g / d), and measure the length (b). Next, after removing the load of 1/500 (g / d), apply a load of 1/20 (g / d) and measure the length (c). Furthermore, remove the load of 1/20 (g / d),
A 1/500 (g / d) load is applied again, and the length (d) is measured. Then, the elastic modulus is determined by the following equation.
That is, the elastic modulus (%) = [(cd) / (c−b)] × 10
It is 0. Further, the crimp rate after the treatment with boiling water for 30 minutes can be obtained by the following equation using the length obtained above. That is, the crimp rate (%) = [(c−b) / c] × 100.

As the components constituting the latently crimpable conjugated polyester fiber having the above-mentioned boiling water shrinkage, elasticity after 30 minutes of boiling water treatment and crimping, any polyester having a fiber-forming ability can be used. Can be obtained.
The latently crimpable conjugated polyester fiber suitably used in the present invention generally comprises a first polyester component having a high intrinsic viscosity [η] and a second polyester component having a low intrinsic viscosity [η]. Are polyester fibers bonded in a side-by-side type. Specifically, a polyester-based fiber in which an intrinsic viscosity [η] of a first polyester component of 0.75 or more and a second component of an intrinsic viscosity “η” of 0.50 or less are joined in a side-by-side type is preferably used. sell. The polyester-based first component having an intrinsic viscosity “η” of 0.75 or more can be obtained, for example, by using a polymer in which 85% by mole or more of the structural unit is polyethylene terephthalate and another 15% by mole or less is another polyester. be able to. The second component having an intrinsic viscosity [η] of 0.50 or less is, for example,
It can be obtained using a polymer in which 95 mol% of the structural units are polyethylene terephthalate. Here, the intrinsic viscosity [η] is measured in an equal weight mixed solvent of phenol and tetrachloroethane at 20 ° C.

Next, the splittable polyester fiber used in the present invention will be described. The split polyester fiber is formed by joining a plurality of ultrafine polyester fibers. For example, as shown in FIG. 1, eight polyester-based ultrafine fibers (1b) are bonded by a polyester-based bonding agent (1a). Further, the alkali solubility of the polyester-based bonding agent (1a) is greater than the alkali solubility of the polyester-based ultrafine fiber (1b).
This is because, when the splittable polyester fiber is immersed in an aqueous alkaline solution, only the polyester-based bonding agent (1a) is dissolved and removed in an aqueous alkali solution, and the splittable polyester fiber is split, as shown in FIG. This is for producing the polyester-based ultrafine fibers (1b). The degree of division of the splittable polyester fiber can be known from the alkali weight loss rate when a fabric made of the fiber is immersed in an alkaline aqueous solution. In the present invention, the alkali weight loss rate is preferably set to about 15 to 30% by weight. When the alkali weight loss rate is less than 15% by weight, the splitting of the splittable polyester fiber tends to be insufficient,
Dyeability and dyeing fastness may be reduced, and the resulting fabric may have an irritation phenomenon. In addition, since the ultrafine fibers (1b) are not sufficiently divided, the peach-like touch peculiar to the ultrafine fibers tends to decrease. Conversely, the alkali weight loss rate is 30
If the amount exceeds 10% by weight, the polyester-based ultrafine fibers (1b) may be partially dissolved, and the strength of the obtained fabric tends to decrease.

As the composition of the polyester-based ultrafine fibers (1b), various conventionally known compositions can be used. In the present invention, it is particularly preferable to use polyethylene terephthalate-based ultrafine fibers. On the other hand, as the composition of the polyester-based bonding agent (1a), as long as the alkali solubility is greater than the above-described polyester ultrafine fibers, particularly preferably the alkali weight loss rate is 2 to 20 times faster, Anything can be used. Specifically, as a polyester used to form a polyester-based bonding agent, ethylene glycol and terephthalic acid are used as main structural units, and polyalkylene glycol, 2,2-bis [4
Polyesters obtained by copolymerizing structural units such as [-(β-hydroxyethoxy) phenyl] propane, its ethylene oxide adduct, and metal sulfoisophthalic acid can be used. Further, a polyester obtained by adding an anionic surfactant can be used. In particular, polyesters that can be suitably used include ethylene glycol and terephthalic acid, and polyethylene glycol 10 to 10 having a weight average molecular weight of 600 to 10,000.
It is preferable to use those obtained by copolymerizing 30% by weight and 1 to 3 mol% of 5-sodium sulfoisophthalic acid. This is because a polyester-based bonding agent formed of this polyester has a high alkali weight loss rate and is excellent in thermal stability.

The fineness of the polyester-based ultrafine fibers is from 0.05 to
0.5 denier. If the fineness is less than 0.05 denier, it is difficult to practically manufacture. In addition, the dyeing processability becomes unstable, and the operability is significantly reduced.
Not preferred. Conversely, if the fineness exceeds 0.5 denier,
It is not preferable because it is difficult to give a high-quality appearance to the obtained fabric and the feel of the fabric surface is hardened. The boiling water shrinkage of the polyester-based ultrafine fibers is 10% or less. When the boiling shrinkage of polyester microfiber exceeds 10%,
The boiling water shrinkage with one of the latently crimpable conjugated polyester fibers to be blended is reduced, and the ultrafine fibers are raised on the surface of the obtained fabric, making it difficult for them to grow densely, giving a natural appearance and airy feeling. Is difficult to obtain, which is not preferred. The method of measuring the boiling water shrinkage of the polyester-based ultrafine fiber is the same as that of the latently crimpable conjugated polyester-based fiber described above.

The latently crimpable composite polyester fiber and the split polyester fiber are mixed to obtain a mixed fiber. In the mixed fiber yarn, the weight ratio between the latently crimpable conjugated polyester fiber and the split polyester fiber is
It is preferable that the splittable polyester fiber is 50 to 150 parts by weight based on 100 parts by weight of the latently crimpable conjugated polyester fiber. When the amount of the splittable polyester fiber is less than 50 parts by weight, the amount of the fine fibers on the surface of the obtained fabric is reduced, and the natural appearance and the peach feeling tend to be reduced. Conversely, the split type polyester fiber is 150
When the amount exceeds the weight part, the amount of the latently crimpable conjugated polyester fiber becomes small, and the elasticity and the airy feeling tend to be reduced. As the fiber mixing method, any conventionally known arbitrary method such as entanglement or twine can be adopted. For example, using a fluid entanglement imparting device such as a Taslan processing nozzle or the like, the entangled yarn can be obtained. Further, in the manner of producing a ply-twisted yarn, for example, ply-twisting can be performed at a plying number of 50 to 600 T / M to obtain a mixed fiber yarn. When the mixed fiber yarn is thus obtained, the latently crimpable conjugated polyester fiber or split polyester fiber may be in the form of a filament or staple fiber.

[0015] Knitting and weaving are performed using the mixed fiber yarn to obtain a fabric. At this time, the dough may be obtained at 100% by weight of the mixed fiber, but may be knitted and knitted using some other yarn. In the case of cross knitting, it is preferable to use at least 30% by weight of the mixed fiber yarn. When the amount of the mixed fiber yarn is less than 30% by weight, there is a tendency that a good appearance, an airy feeling, and a soft and elastic feeling are reduced. For example, using a mixed fiber yarn as a warp and a woven fabric using a general polyester strong twist yarn as a weft as a fabric, and applying the method of the present invention, a high-quality, high-quality polyester-based fabric is obtained. be able to.

After the dough is obtained, the splitting polyester fiber present in the dough is subjected to a splitting treatment. Divided polyester fibers are made by bonding polyester-based ultrafine fibers that are relatively insoluble in alkali with a polyester-based bonding agent that is easily dissolved in alkali. Can be processed. By this splitting process, polyester-based ultrafine fibers are generated from splittable polyester-based fibers in the fabric. As the alkaline solution, a conventionally known alkaline solution is used. In particular, the use of an aqueous solution of caustic soda is most effective in terms of work efficiency and cost. In particular, it is reasonable to use a relaxation and scouring process before dyeing, and at this time, use caustic soda for scouring. The amount of caustic soda used is best in the range of 15 to 20 g / l of flakes. If the amount of caustic soda exceeds 20 g / l, the amount of the polyester-based ultrafine fibers is also reduced, and the tensile strength of the ultrafine fibers tends to decrease. Conversely, if the amount of caustic soda used is less than 15 g / l, the polyester-based bonding agent will not be sufficiently dissolved, and the division will tend to be poor. Therefore,
There is a tendency that a soft feeling is not given to the obtained fabric, and a tendency that dyeing fastness is lowered occurs.

The dough is subjected to shrinkage treatment by applying hot water by various methods. By this shrinkage treatment, the latently crimpable conjugated polyester fiber, the ultrafine polyester fiber or the splittable polyester fiber shrinks. At this time, the latently crimpable conjugated polyester fiber shrinks at a shrinkage rate of 20% or more, and the polyester-based ultrafine fiber or split polyester fiber has a shrinkage rate of 10%.
% Or less. Since the latently crimpable conjugated polyester fiber has a higher boiling water shrinkage ratio than the ultrafine polyester fiber or the splittable polyester fiber, the length of the latently crimpable conjugated polyester fiber is relatively longer. Be shorter. Accordingly, the polyester microfine fibers or split polyester fibers having a relatively long length appear on the surface of the fabric. Further, at the time of this shrinkage treatment, crimp is developed in the latently crimpable conjugated polyester fiber.

[0018] Such shrinkage treatment can be easily performed by subjecting the cloth to general dyeing processing because hot water is used under the dyeing conditions of general polyester cloth. In the relaxing, scouring and presetting steps, the shrinkage treatment can be performed using hot water. Therefore, the dividing process, shrinking process, and dyeing process performed on the fabric may be performed simultaneously or in an arbitrary order.

As described above, it is possible to obtain a polyester fabric having a natural appearance, an excellent airy feeling, an appropriate elasticity, and an appropriate firmness and waist. If, for example, stone washing, sanding, wrinkling, and the like are used in combination in the dyeing process, it is possible to obtain a higher quality fabric.

[0020]

【Example】

Example 1 First, as a latently crimpable conjugated polyester fiber, the following was prepared. Polyester first component having an intrinsic viscosity [η] of 0.76 (12 mol% of isophthalic acid component and 88
Mol% of a terephthalic acid component and a polyester component comprising a diol component such as diethylene glycol) and a second polyester component having an intrinsic viscosity [η] of 0.49, and a side-by-side latent crimpable composite by a melt composite spinning method. A polyester fiber was prepared. The latent crimping conjugated polyester fiber had a triangular cross section, and its boiling water shrinkage was 46.2%. The elastic modulus of the latently crimpable conjugated polyester fiber after treatment with boiling water for 30 minutes was 80%, and the crimping rate after treatment with boiling water for 30 minutes was 69.5%.

On the other hand, as the splittable polyester fiber, the following one having the cross section shown in FIG. 1 was prepared. That is, the component of the wedge-shaped ultrafine fiber (1b) is polyethylene terephthalate having an intrinsic viscosity [η] of 0.67, and the component of the bonding agent (1a) joining the ultrafine fiber (1b) has a molecular weight of 6000.
Is a copolymerized polyester comprising 23% by weight of polyethylene glycol and 2 mol% of sulfoisophthalic acid. The weight ratio of the ultrafine fiber (1b) and the bonding agent (1a) is
(1b): bonding agent (1a) = 4: 1. The fineness of the ultrafine fiber (1b) was 0.13 denier, and the hot water shrinkage was 5.1%.

The 37-denier / 18-filament multifilament yarn made of the above-described latently-crimpable conjugated polyester fiber and the 70-denier / 48-filament multifilament yarn made of the above-mentioned split-type polyester fiber are aligned. After the mixed fiber entanglement treatment, the mixed fiber yarn is used for warp and weft, and has a warp density of 110 yarns / inch and a weft density of 8
Five / inch plain woven fabrics were woven.

The flat fabric obtained in this manner was heated using an open soaper manufactured by Wakayama Iron Works Co., Ltd.
Relaxation treatment (boil-off treatment) was performed at 90 ° C. for 20 seconds. Then, using a circular dyeing machine manufactured by Hisaka Seisakusho Co., Ltd., 1 g / l of caustic soda and 1 g of Sunmol FL (manufactured by Nika Chemical Co., Ltd., surfactant) were used.
Using an aqueous solution in which 1 was dissolved, scouring treatment was carried out at a temperature of 80 ° C. for 15 minutes. Thereafter, using a pin tenter manufactured by Ichikin Industry Co., Ltd., pre-setting was performed at a dry heat of 190 ° C. for 20 seconds.

Then, a dividing process was performed by the following method. That is, using a circular dyeing machine manufactured by Hisaka Seisakusho Co., Ltd., a 20 g / l aqueous solution of caustic soda was applied at 100 ° C. × 3.
A division process for 0 minutes was performed. At this time, the latently crimpable conjugated polyester fiber contracted and exhibited crimping. Then, using a dyeing bath having the composition shown below, dyeing was performed at 130 ° C. for 30 minutes using a circular dyeing machine manufactured by Hisaka Manufacturing Co., Ltd. In addition,
At the time of this dyeing, the latently crimpable conjugated polyester fiber further contracted and exhibited crimp. Note Dianix Red U-SE (disperse dye manufactured by Mitsubishi Kasei Co., Ltd.) 0.05% owf Sun Salt RZ-8 (leveling agent manufactured by Nikka Chemical Co., Ltd.) 0.5 g / l Acetic acid (48%) 0.2 cc / l

Finally, using a pin tenter manufactured by Ichikin Kogyo Co., Ltd., finish setting was performed at 170 ° C. for 20 seconds. The evaluation of the surface feeling, airy feeling, firmness and waist of the polyester-based fabric obtained as described above was as shown in Table 1.

[0026]

[Table 1]

The surface feeling, airy feeling, firmness,
The waist was evaluated according to the following method and criteria. [Surface feeling]: Based on silk stone-washed woven fabric having warmth and natural feeling, it was visually evaluated as follows. ◎: extremely good compared to the reference fabric; ○: excellent compared to the reference fabric; △: slightly poor compared to the reference fabric; x: poor compared to the reference fabric. [Airy feeling]: The three types of characteristics of lightness, swelling, and drapability were evaluated by handling to determine whether they were expressed in a well-balanced manner as follows. ◎ ... Three kinds of characteristics are expressed in a well-balanced and extremely good manner. ○ ... Three kinds of properties are expressed in a good-balanced manner and good. △: The balance of the three kinds of properties is slightly poor. X: Somewhat poor, poor balance of three types of properties, poor. [Harness / Waist]: Based on a strong twisted woven fabric using a high-stress / high-shrink yarn, it was evaluated as follows by handling. ◎: extremely good compared to the reference fabric; ○: excellent compared to the reference fabric; △: slightly poor compared to the reference fabric; x: poor compared to the reference fabric.

Comparative Example 1 Instead of a 37-denier / 18-filament multifilament yarn composed of latently crimpable conjugated polyester fiber, a non-polyester yarn consisting of only a copolymer component of polyethylene terephthalate and 10 mol% of isophthalic acid was used. A polyester fabric under the same conditions as in Example 1 except that a 30 denier / 12 filament multifilament yarn using a non-composite polyester fiber (boiling water shrinkage of 46.2%) of latent crimpability is used. I got The evaluation of surface feeling, airy feeling, firmness and waist of the polyester-based fabric was as shown in Table 1.

Example 2 As the warp, the mixed yarn prepared in Example 1 was used.
On the other hand, a 75-denier / 36-filament regular polyester SZ2800T / M strongly twisted multifilament yarn was used as the weft. And the density of 141 / inch, weft density of 85
A book / inch desi fabric was woven.

Using a circular dyeing machine manufactured by Hisaka Seisakusho Co., Ltd., the thus-obtained decined fabric was relaxed at 100 ° C. for 20 minutes at a temperature of 100 ° C. using an aqueous solution of a carrier of 1 g / l. Was given. Then, using a circular dyeing machine manufactured by Hisaka Seisakusho Co., Ltd., 20 g / l of caustic soda and Sun Mall FL (manufactured by Nikka Chemical Co., Ltd.
(Surfactant) using an aqueous solution in which 1 g / l is dissolved,
The scouring treatment was performed at 00 ° C. for 30 minutes. In the relaxing treatment and the scouring treatment, the latently crimpable conjugated polyester fiber exhibited shrinkage and crimping, and in the scouring treatment, the split polyester fiber was split to produce a polyester-based ultrafine fiber. Thereafter, using a pin tenter manufactured by Ichikin Industry Co., Ltd., dry heat at 190 ° C for 2 hours.
Presetting was performed under the condition of 0 seconds.

Further, after that, caustic soda is
Using a 40 g / l aqueous solution, alkali reduction treatment was performed at a temperature of 100 ° C. The alkali weight loss rate is 26.0%,
Further, the splitting of the splittable polyester fiber proceeded. Then, staining was performed under the same conditions as in Example 1. Finally, use a pin tenter manufactured by Ichikin Industry Co., Ltd.
The finishing set was performed at 20 ° C. for 20 seconds. The evaluation of the surface feeling, airy feeling, firmness and waist of the polyester-based fabric obtained as described above was as shown in Table 1.

Comparative Example 2 The mixed fiber used in Example 2 was used to obtain
Instead of a multifilament yarn of 37 denier / 18 filaments composed of latently crimpable conjugated polyester fiber, a non-latently crimping and non-laminating material composed of only a copolymer component of polyethylene terephthalate and 10 mol% of isophthalic acid. A polyester-based fabric was obtained under the same conditions as in Example 2 except that a 30-denier / 12-filament multifilament yarn using a composite-type polyester fiber (boiling water shrinkage was 46.2%) was used. The evaluation of surface feeling, airy feeling, firmness and waist of the polyester-based fabric was as shown in Table 1.

As is clear from a comparison between Examples 1 and 2 and Comparative Examples 1 and 2, a latently crimpable conjugated polyester fiber having predetermined physical properties and a split-type polyester fiber having predetermined physical properties were obtained. In the case of using a blended mixed yarn, a case where a latently crimpable conjugated polyester fiber having predetermined physical properties is not used (a case where a non-latently crimpable non-composite polyester fiber is used) It can be seen that the airy feeling is particularly excellent as compared with the case of (1).

[0034]

According to the present invention, a cloth is knitted and woven using a mixed fiber obtained by mixing a latently crimpable conjugated polyester fiber having predetermined physical properties and a splittable polyester fiber having predetermined physical properties. After that, the latently crimpable conjugated polyester fiber in the mixed fiber yarn is greatly shrunk and crimped,
In addition, the split type polyester fibers are split to produce polyester type ultrafine fibers. Therefore,
The mixed fiber yarn constituting the obtained polyester-based fabric is in a state in which the polyester-based ultrafine fibers are exposed on the surface of the greatly shrunk and crimped composite polyester-based fibers. For this reason, by the synergistic action of the crimp of the composite polyester fiber and the ultrafine fibers densely formed on the surface, the obtained fabric has an appearance having swelling, elasticity, lightness, and natural feeling. . Further, the conjugate polyester fiber greatly shrunk imparts appropriate tension and waist to the obtained fabric.

[0035]

As described above, the polyester-based fabric obtained by the method according to the present invention has a natural appearance, excellent airy feeling, moderate elasticity, light weight, and moderate firmness and waist. This has the effect of being performed. Therefore, this polyester-based fabric, for example, as a material for women's clothing,
Alternatively, it can be suitably used as a material for high-grade clothing.

[Brief description of the drawings]

FIG. 1 is an example of a splittable polyester fiber used in the present invention, showing a cross-sectional view thereof.

FIG. 2 is a cross-sectional view showing a state in which the splittable polyester fiber of FIG. 1 is split.

[Explanation of symbols]

 (1a) Polyester-based bonding agent (1b) Polyester-based ultrafine fiber

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D06M 11/38 D03D 15/00-15/04 D02G 3/04

Claims (1)

(57) [Claims] 1. A latently crimpable conjugated polyester fiber satisfying the following requirements (1) to (3) and a splittable polyester fiber satisfying the following requirements (4) to (8): Using a woven mixed fiber yarn, weaving and weaving to obtain a fabric, then subjecting the split-type polyester-based fiber to a splitting treatment, shrinking the latently crimpable composite-type polyester-based fiber and expressing crimp And a dyeing process for the fabric. (1) The latently crimpable conjugated polyester fiber has a boiling water shrinkage of 20% or more. (2) The latently crimpable conjugated polyester fiber has a boiling water of 30%.
The elastic modulus after dispensing must be 70% or more. (3) The latently crimpable composite polyester fiber has a boiling water of 30%.
Crimp rate after dispensing is 50% or more. (4) The split polyester fiber is formed by joining a plurality of polyester ultrafine fibers. (5) The plurality of ultrafine polyester fibers are bonded by a polyester bonding agent. (6) The alkali solubility of the polyester-based bonding agent is greater than that of the polyester-based ultrafine fibers. (7) The fineness of the polyester microfiber is 0.05 to 0.5 denier. (8) The polyester microfiber has a boiling water shrinkage of 10% or less.