JPH05295660A - Production of polyester based mixed fiber structure - Google Patents

Abstract

PURPOSE:To provide excellent coloring property and handle to a fiber structure consisting of a blend of a polyester based fiber with a natural fiber by treating the fiber structure with dichloromethane. CONSTITUTION:A fiber structure of a blended yarn of polyester based fiber obtained by copolymerizing or blending a polyethylene terephthalate, polybutylene terephthalate, isophthalic acid sulfonate, adipic acid, polyethylene glycol, etc., with a natural fiber such as wool, cotton, linen or silk or a core- sheath type yarn using the polyester based fiber as the core and the natural fiber as the sheath, or a woven and knitted fiber using this core-sheath type yarn is treated with dichloromethane at a temperature of its boiling point or below and then dyed to provide the objective fiber structure. Thereby, the polyester based fiber is selectively shrunk and the natural fiber is efficiently arranged on the surface of the fiber structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a polyester-based mixed fiber structure excellent in color developability and texture.

[0002]

2. Description of the Related Art Polyester fibers are widely used for clothing because they are excellent in mechanical properties and have functionality such as wash and wear.

However, because of its mechanical characteristics, the texture is rigid and the equilibrium moisture content is low, resulting in poor comfort,
It also has the drawback of poor color development.

In order to improve such drawbacks, natural fibers having a soft texture, excellent in comfort and color development are mixed, and in order to make the functionality of polyester fiber and the functionality of natural fiber compatible, they are mixed. It is commonly used.

[0005]

However, in order to emphasize the functionality of the natural fiber, for example, in the case where the polyester fiber and the natural fiber are the single fiber blended yarns in which the both fibers are mixed, the mixing of the both is performed. If the content of natural fibers is increased, the wash-and-wear function of polyester fibers will be impaired, and if the content of polyester fibers is increased, the surface touch will become coarse and hard, and the pill resistance will decrease. It had a drawback.

In view of the above situation, the present invention provides a method for producing a polyester-based mixed fiber structure which is excellent in both color developability and texture.

[0007]

The present invention has the following constitution in order to achieve such an object.

That is, the method for treating a fiber structure of the present invention is characterized by treating the fiber with a mixed fiber of polyester fiber and natural fiber, dichloromethane, to shrink the polyester fiber.

[0009]

In view of the above-mentioned situation, the present invention has made extensive studies, and as a result, in a polyester-based mixed fiber structure in which a polyester fiber and a natural fiber are mixed, the polyester fiber is positively contracted to make the natural fiber a fiber structure. It was clarified that the functionality of the polyester fiber and the natural fiber can be made compatible by concentrating the surface of the material. That is, the present invention has completed the present invention by discovering that dichloromethane has a property of selectively shrinking polyester fibers.

As the polyester fiber used in the mixed fiber of the present invention, polyethylene terephthalate, polybutylene phthalate or a third component such as isophthalic acid sulfonate, adipic acid, isophthalic acid, polyethylene glycol or the like is copolymerized or Fibers obtained by blending can be used.

The natural fibers used in the mixed fiber of the present invention include known natural fibers such as cotton, wool, hemp, and silk.

As the fibrous structure composed of such mixed fibers, knitted fabrics, non-woven fabrics, fibers, tows, strings, etc. composed of long fibers and / or short fibers can be used.

As a method for mixing the polyester fiber and the natural fiber of the present invention, a mixed fiber yarn in which the respective fibers are aligned or blown with air or the like to be entangled,
Alternatively, it is a core-sheath structure yarn in which a natural fiber is wound around a polyester fiber, or a blended yarn in which short fibers of both fibers are mixed.

The method for treating the fiber structure composed of such mixed yarns with dichloromethane includes a method of dipping the fiber structure in a liquid of dichloromethane, a method of applying a certain amount of dichloromethane to the fiber structure and leaving it standing, or a vapor of dichloromethane. It is possible to adopt a method of processing in the inside.

In carrying out such treatment, it is effective to form a fibrous structure made of mixed fibers and then to treat it in a so-called greige state without heat treatment, but scouring, heat setting, dyeing, etc. The effect of the present invention can be achieved even after the heat treatment of 1 has been completed.

By the treatment of the present invention, the polyester fibers are selectively shrunk and the natural fibers are efficiently arranged on the surface of the fiber structure. Therefore, even if the mixing ratio of the natural fibers is low, the polyester fibers and the natural fibers are It is possible to provide a polyester-based mixed fiber structure having the excellent color-forming property and texture, which also has the functions of, and of course, it is also possible to provide excellent wash-and-wear property and anti-pill property. Is.

The treatment temperature of the present invention is preferably a boiling point of dichloromethane or lower in order to effectively shrink the polyester fiber and prevent the natural fiber from shrinking as much as possible.

[0018]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

Example 1 and Comparative Example 1 A twill fabric using a 2/48 spun yarn having a mixing ratio of polyethylene terephthalate and wool of 50:50 as warp and weft (weaving density: 80 warp / inch) , 68 wefts / inch) were processed under the following conditions.

The results of performance evaluation are shown in Table 1.

The performance in the table was measured by the following method.

(Coloring property) The L value was measured by a digital colorimetric calculator manufactured by Suga Test Instruments Co., Ltd. The L value represents the luminous density of a color, and the smaller the value, the darker the color.

(Anti-pill property) A of JIS-L-1076
Method (ICI method).

(Thickness) The thickness of the woven fabric of the product is defined by JIS-L.
It was measured based on -1018.

In Example 1, the raw fabric was immersed in a dichloromethane solution at 20 ° C. for 20 minutes, and then the fabric was left in the air overnight to remove the dichloromethane by natural evaporation (density.
Vertical length 84 lines / inch, weft 85 lines / inch). Then, after dyeing with an acid dye, washing with water, and air-drying (density vertical 89 lines / inch, weft 78 lines / inch), heat setting was carried out at a temperature of 160 ° C. with the same density as the air-dried one.

In Comparative Example 1, the raw fabric was a dyeing machine at 95 ° C.
After scouring at the temperature of 30 minutes, washing with water and drying (density: 88 vertical lines / inch, weft: 79 vertical lines / inch), dyeing with acid dye, washing with water, and air drying (density vertical 89 lines / inch,
(Weft 78 / inch), 16 at the same density as the air-dried one
Heat set at a temperature of 0 ° C.

The above dyeing was carried out under the following conditions.

(Dyeing) Suminol Milling Cyanine 5R (acid dye manufactured by Otomo Chemical Co., Ltd.) 2% ow
Dyeing was carried out in Win at a bath ratio of 1:50 at 95 ° C. for 60 minutes.

[Table 1] As is clear from Table 1, those of Example 1 are the same as those of Comparative Example 1.
On the other hand, since there are more wool fibers on the surface of the fabric, the coloring is good, and the soft touch of the thick wool touch gives it less unevenness on the dyed surface, and the pill resistance is greatly improved. Can be confirmed.

Example 2 and Comparative Example 2 A plain woven fabric (woven fabric having a warp density of 100 and a warp yarn) prepared by aligning 30 denier 12-filament polyethylene terephthalate and 30 denier silk filaments was used.
Table 2 shows the results of evaluating the performance by treating a raw machine having a line / inch and a weft of 90 lines / inch under the following conditions.

In Example 2, the greige cloth was immersed in a dichloromethane solution at 30 ° C. for 5 minutes, and then the woven fabric was left in the air overnight to remove dichloromethane by natural evaporation (density: 118 fibers / inch, weft: 102 fibers). /inch). Then, sericin was removed with an aqueous Marcel soap solution (weight reduction with respect to the weight of silk was 21.3%), dyed with an acid dye, washed with water, and air-dried (density: vertical 118 / inch, weft 101 / inch) and air-dried. The same density was used for heat setting at a temperature of 160 ° C.

In Comparative Example 1, the greige was scoured in a water bath at a temperature of 95 ° C. for 30 minutes, washed with water and dried (density 110 vertical / inch, weft 99 linear / inch), and then 190 ° C.
Was heat-set at a temperature of (density: 118 lines / inch, weft: 102 lines / inch). Then, sericin was removed with an aqueous solution of Marcel soap (the weight loss relative to the weight of silk was 2
(2.6%), dyed with an acid dye, washed with water, air-dried (density: vertical 119 lines / inch, weft 102 lines / inch), and heat set at a temperature of 160 ° C. with the same density as that of the air-dried product.

The above dyeing was carried out under the following conditions.

(Dyeing) Kayanol Milling Red RS (an acid dye manufactured by Nippon Kayaku Co., Ltd.) 3% owf was dyed with Wins at a bath ratio of 1:50 at 95 ° C for 60 minutes.

[0034]

[Table 2] From Table 2, it is confirmed that the silk fibers of Example 2 are those in which the silk thread is raised on the surface of the woven fabric and have excellent color development and texture, as compared with those of Comparative Example 2.

[0035]

EFFECTS OF THE INVENTION According to the present invention, it is possible to provide a fiber structure in which a polyester fiber and a natural fiber are mixed and which simultaneously satisfies the color developing property and the texture.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location D06P 5/00 DBC 9160-4H 102 9160-4H

Claims (7)

[Claims] 1. A method for producing a polyester-based mixed fiber structure, which comprises treating a fiber structure in which polyester fibers and natural fibers are mixed with dichloromethane. 2. The method for producing a polyester-based mixed fiber structure according to claim 1, wherein the fiber structure is a mixed yarn of polyester-based fibers and natural fibers. 3. The method for producing a polyester-based mixed fiber structure according to claim 1, wherein the fiber structure is a core-sheath yarn in which a polyester fiber is used as a core portion and a natural fiber is used as a sheath portion. 4. The method for producing a polyester-based mixed fiber structure according to claim 1, wherein the fiber structure is a mixed yarn of polyester-based fibers and natural fibers. 5. The method for producing a polyester-based mixed fiber structure according to claim 1, wherein the treatment with dichloromethane is performed at a temperature not higher than the boiling point. 6. The method for producing a polyester-based mixed fiber structure according to claim 1, which is dyed after being treated with dichloromethane. 7. The method for producing a polyester-based mixed fiber structure according to claim 1, wherein the fiber structure is dyed.