JPH0892835A - False-twisted yarn - Google Patents

Abstract

PURPOSE: To obtain a false-twisted yarn for woven fabric having a combination of nice firm touch, soft touch feeling and spun yarn-like feeling, by false-twisting thick-and-thin yarns each comprising splittable ultrafine conjugate fibers and partly fusing the undrawn portions. CONSTITUTION: Firstly, two thick-and-thin yarns each comprising splittable ultrafine conjugate fibers respectively made up of polyethylene terephthalate and block polyether-ester-copolymerized polyethylene terephthalate are arranged in parallel with each other and subjected to false twisting into a false-twisted yarn having partly fused undrawn portions. Next, the false-twisted yarn are woven, as warps and wefts, into a satin fabric, which is then scoured and subjected to relaxation, caustic reduction and dyeing finish to effect splitting the thick-and-thin yarn into ultrafine fibers <=0.5dl in single fiber fineness, thus obtaining a woven fabric having a combination of nice firm touch and soft touch feeling.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a false twist textured yarn.

[0002]

2. Description of the Related Art As a material for spring and summer, a mixture of hemp with a sharp taste has been popular, but it has been pointed out that one of the drawbacks of using hemp is that it has a sharp taste and a hard texture. On the other hand, as a method of approaching a hemp texture without using hemp, a method of fusing constituent fibers to each other by heat or a solvent is known. For example, it is not disclosed in Japanese Patent Publication No. 51-11218. A false twisted yarn obtained by aligning one or more so-called thick and thin yarns of a polyester multifilament yarn composed of single yarn filaments in which stretched portions are distributed and fusing the unstretched portions to obtain a crispness However, it has the drawbacks that the texture is hard, it has a feeling of roughness, it lacks bulge, and the texture of the spun yarn is difficult to obtain.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a false twisted textured yarn having a crisp taste, a soft texture and a swelling feeling, and a texture of a spun yarn, which solves the above drawbacks.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a false twisted yarn composed of a sick and thin yarn of a split type ultrafine composite fiber in which ultrafine fibers having a single yarn denier after division of 0.5 denier or less are joined. A false twisted yarn, wherein the undrawn portion of the thick and thin yarn is fused.

The split type ultrafine composite fiber used in the present invention, which is formed by joining ultrafine fibers having a denier after splitting of 0.5 denier or less, is basically composed of two kinds of heat having different adhesiveness and solubility in a solvent. It is a composite fiber made by combining plastic polymers, usually after making a fabric or sheet,
Two kinds of polymers are separated or one of them is melted and peeled to obtain a cloth or sheet made of ultrafine fibers. If necessary, a composite fiber in which three or more kinds of thermoplastic polymers are combined is used. Alternatively, three or more polymers may be separated or one or more polymers may be dissolved and peeled. The present invention is characterized by using such a conjugate fiber thick and thin yarn, and thereby provides a false twisted yarn having a crisp taste, a soft texture and a feeling of swelling, and a texture of a spun yarn.

The thick and thin yarn of the composite fiber is
Conventionally known methods for producing thick and thin yarns, for example, Japanese Patent Publication No. 51-7207, Japanese Patent Publication No. 52-6367,
It can be obtained by the method disclosed in JP-A-63-18241. The thick-and-thin yarn is a multifilament yarn composed of single-filament filaments in which unstretched portions are distributed in the yarn length direction, and the unstretched portion here means a portion having a lower degree of stretching than the stretched portion. . As for the ratio of unstretched parts, it is preferable that 1 to 3 unstretched parts having a length of about 2 to 20 mm are randomly distributed per 10 cm of the single yarn filament.

In the present invention, known polymers can be used as the polymer constituting the conjugate fiber.
Polyamides such as nylon 6, nylon 66 and nylon 612, copolymers thereof, polyesters such as polyethylene terephthalate and polynaphthalene terephthalate, cation dyeable polyesters etc. copolymers thereof, polymers such as polypropylene and polyethylene and copolymers thereof. A polymer is used, but a combination of polyesters and a combination of polyester and polyamide are preferred because of their versatility. If necessary, known additives such as stabilizers, matting agents and antistatic agents may be contained in a small amount. The monofilament filament of the composite fiber preferably has a non-circular cross section of triangular to octagonal, the monofilament denier is preferably 0.5 to 3 denier, and the total denier is 30 to 150 denier.

Particularly, in the present invention, Japanese Unexamined Patent Publication No. 4-126814.
It is composed of a thermoplastic polymer of AB type 2 as disclosed in Japanese Patent Publication No. JP-A No. 2003-242242, the A component can be divided into 4 to 8 in the shape of a convex lens, and the A component occupies 7% of the total area of the fiber cross section.
0 to 90%, 95% or more of the total circumference is 100 to 100
Since the composite fiber having a content of less than 10% is excellent in easy splitting, it is suitable for achieving the object of the present invention.

Depending on the properties of the polymer to be combined, the dividing method may be a method of mechanically peeling with a high-pressure fluid such as beating, squeezing, or a pouring flow, or one component may be dissolved with a solvent or a decomposing agent, and then separated and peeled. There are ways to do these, and combinations of these. In particular, in the present invention, one of the two polymers or 3
A method of dissolving, dividing and removing one or more of the polymers of one or more types and peeling them is preferable in terms of obtaining swelling, soft texture and texture of spun yarn. The single yarn denier after splitting is preferably 0.5 denier or less, preferably 0.01 to 0.3 denier, more preferably 0.05 to 0.2 denier, beyond which the object of the present invention is not achieved. However, if it is less than this, it becomes difficult to spin or divide the composite fiber.

In the present invention, such a thick and thin yarn of the composite fiber is used for false twisting at a temperature at which the undrawn portion is softened or melted. One or more of the thick and thin yarn is drawn. They may be supplied in line, or may be supplied in line with other yarns, and may be appropriately selected as desired. Here, the term “aligning and false-twisting” means that the raw materials are supplied as they are, or they are entangled and mixed, and then supplied at the same time, or they are supplied with a feed difference (preferably about 2 to 15%). Incidentally, D (= denier of the original yarn) in the calculation of the false twist number when the two or more fibers are aligned and supplied is the total denier after the alignment.

Other yarns to be supplied in parallel are preferably those having one to a plurality of hollow portions continuously extending along the length direction of the single filament, triangular to octagonal. Non-circular cross section, various stabilizers and matting agents,
Those containing known additives such as antistatic agents, cationic dyeable polyesters, thick and thin yarns (the proportion of unstretched parts is
The undrawn portion having a length of 2 to 20 mm is a single filament 10
1 to 3 randomly distributed per cm, hollow or non-circular cross section, so-called semi-dal and full-dal yarns containing a matting agent such as titanium oxide are preferred), spontaneous crimp type composite fibers (shrinkage) Coil-shaped three-dimensional crimps are generated by shrinking by heating or swelling after joining two components with different properties. The composite form is based on parallel type and eccentric sheath core type), high shrinkage yarn , A combination of one or more of ordinary split type ultrafine composite fibers, thick denier yarn having a denier of 4 to 6 denier (for example, hollow fiber having a large denier), denier of 1 to 4 denier and elongation at break 50.
%, A polyester multifilament yarn having an initial tensile resistance of 900 kg / mm ² or more after boiling water treatment is preferable.

The false twisting conditions are such that the number of false twists is, for example, Japanese Patent Publication No.
The number of false twists known in Japanese Laid-Open Publication No. 1-111818 = {23000 /
√D + 590} × 0.98 to 1.14 (T / M) (D = denier of original yarn), such as a false twist number as high as 1.0, but false twist number = {23000 / √D + 590} × 0.3-0.7
It is preferable to process with a low false twist number such as (T / M) because a silky-like processed yarn can be obtained. False twist number is 0.
If it is less than 3, fusion of the unstretched portion will be insufficient, and if it exceeds 0.7, crimping will be imparted, and fusion will take place in the twisted or wound state, resulting in a strong dry touch and a wooly-like appearance. It is preferably 0.40 to 0.65, and particularly preferably 0.5 to 0.65.

The reason why a silky-like processed yarn having a bulging feeling is obtained is that the yarn structure of the obtained processed yarn is partially fused at the unstretched portion in the state where the single yarn filament is opened. It is considered that the silky bulging sensation is obtained because of the yarn structure in which the opened state of the single yarn filament is fixed by fusing the undrawn portion. Further, since crimps are not applied, a wooly-like texture is not obtained. Further, when the fusion is carried out with a high false twist number, the fused part becomes a fused dry state in a twisted state or a wound state, so that a strong dry touch is obtained, but with a low false twist number, the fusion or twisting of the fused part is performed. The wrapping is extremely weak, and because it is fused as if it were aligned, a soft dry touch is obtained.

The false twist temperature is a temperature at which the unstretched portion is softened or fused, preferably 195 to 245 ° C., particularly 210.
~ 240 ° C is good. If the temperature is low, fusion will be insufficient, and if the temperature is high, yarn breakage will occur frequently and the false twisting processability will deteriorate. The false twisted textured yarn of the present invention is most effective when it is used in an amount of 200 T / m or less, preferably substantially untwisted.

The false twisted yarn of the present invention is usually effectively used as a woven fabric, but it may be knitted, or may be made of 100% false twisted yarn or mixed with other fiber yarns. Well, the mixed form may be appropriately selected according to the purpose.
Further, in producing a woven fabric, it is most effective to use both warp and weft, but it may be mixed with other yarns, and as other fiber yarns to be mixed, sick and In addition to those exemplified as the yarns for false twisting by aligning with thin yarns, ultrafine fibers having a denier of 1 denier or less, heterogeneous shrinkage mixed fiber, spontaneously extensible mixed fiber, single denier of 0.1 denier 0.8 denier extra fine polyester multifilament yarn, 6000 m / min, preferably 7000 m
It may be mixed with one or more spin take-up yarns spun at a winding speed of not less than / min, and may be appropriately selected according to the purpose.

Regarding the design of the woven fabric, there are flat, twill, satin and modified structures thereof, but the satin design is particularly preferred. The warp density is preferably 130 to 200 lines / inch, more preferably 150 to 180 lines / inch, and weft is 50 to 9 lines.
0 line / inch is preferable, and 60 to 80 is more preferable.
The number of lines / inch and the finish density are preferably 150 to 220 lines / inch, more preferably 170 to 200 lines / inch, and the weft is preferably 60 to 100 lines / inch, and more preferably 70 to 90 lines / inch. .

As a finishing step, after weaving, scouring and relaxing, dividing treatment, alkali weight reduction processing of about 10 to 35% (may also serve as dividing treatment), and then dyeing finishing processing are performed according to a conventional method. Further, a brushed material such as so-called peach skin may be imparted with, for example, an emery paper, a brush, a needle cloth, and various finishing processes such as embossing and printing may be performed. Also, softener, water repellent,
A finishing agent such as an antistatic agent may be used.

[0018]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples. Example 1 As a component A, polyethylene terephthalate having ηsp / c = 0.73, and as a component B, polyethylene terephthalate, a block polyether ester (ηsp) obtained by copolymerizing 15% by weight of polyethylene glycol having a molecular weight of 4000.
/C=0.72), a 6-division type ultrafine composite fiber was spun at a spinning winding speed of 1500 m / min, and an undrawn yarn of polyester multifilament yarn of 120d / 72f was preheated at 60 ° C and hotplate temperature was 120 ° C. , Stretch ratio 2.2
5. Thick and thin yarn of 65d / 72f polyester multi-filament yarn drawn at a speed of 1000 m / min.
(1 to 2 randomly distributed per 0 cm) was obtained.

Two thick and thin yarns were aligned and simultaneously false twisted. (A) False twist temperature: 240 ° C. (B) False twist number: 7 levels in the range of 680 to 2600 T / m The false twisted yarn obtained was one in which the undrawn portion was partially fused. This false twisted yarn is used as a warp and a weft without twisting, a warp density of 150 yarns / inch, a weft yarn density of 67 yarns / inch is used to make a woven fabric with a satin (2 jumps) structure of 5 sheets, scouring relax, alkali reduction The weight reduction rate was 28%), and then dyeing and finishing were performed to finish the warp density to 177 yarns / inch and the weft yarn density to 82 yarns / inch. The B component of the thick and thin yarn was completely removed, and the single yarn denier of the A component after division was 0.15 denier.

False twisted 780T / within the range of low false twist number
m (0.30), 1300 T / m (0.50), 170
The false twist numbers of 0T / m (0.65) and 1830T / m (0.70) have a crisp taste, a soft texture and swelling, and a texture of spun yarn, and have a silky-like swelling feeling. , Especially 1300 T / m (0.5
0) The false twist number of 1700 T / m (0.65) had a silky-like swelling feeling. on the other hand,
The 680 T / m (0.26) has a lack of crispness because it is close to the texture of the raw yarn, and 2040 T / m (0.76).
8) The product of 2600 T / m (1.0) had a slightly crisp taste relative to the low false twist number, but had a wooly-like texture having both a soft texture, a bulge and a texture of spun yarn.

Comparative Example 1 In Example 1, the false twist temperature was 170 ° C. and the false twist number was 1830.
As a result of evaluation in the same manner except that false twisting was performed at T / m (0.70), the unstretched portion was not fused and had no sharpness.

Comparative Example 2 A triangular cross-section having three hollow portions and having a diameter of 5 to 15 mm
Two thick and thin yarns of polyester multifilament yarn of 75d / 24f having two unstretched portions of the above length randomly per 10 cm of single yarn filament were aligned and false twisted at the same time. (A) False twist temperature: 240 ° C. (B) False twist number: 2 levels of 1730, 2500 T / m The obtained false twisted yarn was evaluated in the same manner as in Example 1 and the result was 1
730 T / m (0.70) had a crispy, silky-like swelling feeling, but Example 1
It was inferior in soft texture and bulge as compared with No. 1, and did not have the texture of spun yarn. Also 2500 T / m
The product (0.78) had a strong crispness and a crimped, woolly-like texture.
It was inferior in soft texture and bulge as compared with No. 1, and did not have the texture of spun yarn.

COMPARATIVE EXAMPLE 3 In Example 1, two ordinary drawn yarns of 75d / 72f 6-division type ultrafine composite fiber were aligned and the false twist temperature was 240 ° C.
As a result of the same evaluation except that the false twisting was simultaneously performed at the false twist number of 1730 T / m (0.7), the unstretched portion was not fused and had no sharpness.

Example 2 In Example 1, two sick and thin yarns of 85d / 72f 6-division type ultrafine composite fibers were aligned and false twisted at a temperature of 24.
The false twisting was simultaneously performed at 0 ° C. and the false twisting number of 1650 T / m (0.7). The obtained false twisted yarn was evaluated in the same manner as in Example 1. As a result, as in Example 1, it had a crisp taste, a soft texture and swelling, and a texture of a spun yarn, and had a silky-like swelling feeling.

[0025]

Industrial Applicability According to the present invention, it is possible to provide a false twisted textured yarn having a crisp taste, a soft texture and a texture of spun yarn.

Claims (1)

[Claims] 1. A false twist textured yarn composed of a sick and thin yarn of a split type ultrafine composite fiber in which ultrafine fibers having a denier of single yarn after division of 0.5 denier or less are joined. A false twist textured yarn in which the undrawn portion of the yarn is fused.