JPH08134731A - Polyester composite processed yarn - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a composite processed yarn that can exhibit a soft texture, a swelling feeling, and a feeling of being firm and elastic. A composite processed yarn having a false twist crimp composed of three or more kinds of polyester multifilaments, wherein the composite processed yarn has a yarn length of 2% or more longer than other polyester multifilaments and others. The polyester composite processed yarn containing the polyester multifilament, which has a dissolution rate in alkaline hot aqueous solution of 5 times or more than that of

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester composite processed yarn which can be suitably used for applications such as clothing and daily life materials.
More specifically, by incorporating a polyester multifilament having a high dissolution rate in an alkaline hot aqueous solution into a part of the composite processed yarn, and elution and removal of the polyester multifilament with an alkaline hot aqueous solution after knitting and weaving, a soft feeling, a swelling feeling, TECHNICAL FIELD The present invention relates to a polyester composite processed yarn capable of exhibiting a texture excellent in tightness.

[0002]

2. Description of the Related Art Polyester multifilaments have been widely used for clothing and daily life applications by taking advantage of their excellent characteristics. False twisting is performed as a method to make the polyester multifilament bulky and obtain a wool-like texture.To obtain a carded-like texture, multiple polyester multifilaments are combined so as to have a core-sheath structure. Composite false twisted yarns are also known.

As an example of the above-described composite false twisted yarn, there is Japanese Patent Publication No. 61-19733. The composite false twisted yarn of the publication gives a feeling of swelling due to the difference in yarn length between the constituent multifilaments, but when the composite false twisted yarn is used for textiles, when it is usually woven after additional twisting. There are many. This is because the false-twisted composite yarn has a core-sheath structure, and is for the purpose of preventing a stuffed texture due to excessive bulkiness of the sheath thread and giving a crisp texture. The number of twists in the additional twist depends on the denier of the composite false twisted yarn, but is usually 1000 (T / m) or more. This is because it is difficult to obtain a crisp texture unless it is 1000 (T / m) or more. However, as the number of additional twists increases, the mutual tightening of the constituent filaments becomes stronger, and the texture becomes rough and hard, and there is a problem that the swelling feeling and soft feeling are impaired. In order to finish the texture softly, it is often done by weaving and then alkali weight reduction processing in the dyeing process.The texture becomes softer as the weight loss rate increases, but the filaments that make up the core part become thinner than necessary. , If it lacks firmness, it tends to have a sticky texture.

As described above, the woven fabric woven using the conventional composite false-twisted yarn having the core-sheath structure is difficult to satisfy all of the soft feeling, the swelling feeling, and the tightness feeling.
It was difficult to finish to the desired texture.

[0005]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the problems of the conventional composite false-twisted yarn as described above, in which a part of the composite false-twisted yarn having a core-sheath structure is provided. The constituent filament is a polyester filament having a high dissolution rate in an alkaline hot aqueous solution, and the composite false-twisted yarn is additionally twisted, and after weaving, the polyester filament having a high dissolution rate is completely removed by the arikari weight reduction process to elute and remove the core. The filaments that make up the parts are not too thin, and while maintaining a firm and elastic feel, the soft and swelling texture can be brought out.

[0006]

Means for Solving the Problem That is, the present invention provides a composite textured yarn having a false twist crimp composed of three or more kinds of polyester multifilaments, and the polyester multifilament A contained in the composite textured yarn is The yarn length is 2.0 (%) or more longer than the other constituent polyester multifilaments, and the polyester multifilament B contained in the composite processed yarn has a dissolution rate of 5 times or more in an alkaline hot aqueous solution than the other constituent polyester multifilaments. It is a characteristic polyester composite processed yarn.

The polyester composite textured yarn of the present invention is obtained by composite false twisting of three or more types of polyester multifilaments. The three types of polyester multifilaments are as follows. Other composition Polyester multifilament A whose yarn length is 2.0% or more longer than that of polyester multifilament. Thread length from polyester multifilament A is 2.
Polyester multifilament B, which is shorter than 0 (%) and has a dissolution rate in an alkaline hot aqueous solution of 5 times or more that of other constituent polyester multifilaments. Thread length from polyester multifilament A is 2.
Shorter than 0 (%), polyester multifilament B
Polyester multifilament C having a dissolution rate less than (1/5) times in an alkaline hot aqueous solution.

The term polyester used in the present invention is a polymer having an ester bond and having a fiber-forming ability, but the polyester multifilaments A and C and the polyester multifilament B are clearly different in composition. This is because the dissolution rate in the alkaline hot aqueous solution is made different by a factor of 5 or more. Therefore, it is not preferable that the polyester multifilaments A and C have an extremely high dissolution rate in an alkaline hot aqueous solution,
Specifically, polyethylene terephthalate is preferable. However,
The third component may be copolymerized as long as the difference in dissolution rate from the polyester multifilament B is satisfied. Further, a small amount of a matting agent such as titanium oxide, a fine pore forming agent such as kaolinite, and an antistatic agent may be added. It is preferable that the polyester multifilament B has a relatively high dissolution rate in an alkali hot aqueous solution. Specifically, polyester in which polyalkylene glycol, dimethyl 5-sodium sulfoisophthalate, isophthalic acid or the like is added or copolymerized is preferable.

The polyester composite processed yarn of the present invention is subjected to alkaline hot water treatment in the dyeing process after weaving and weaving to elute and remove the contained polyester multifilament B. When the dissolution rate of the polyester multifilament B in the alkaline hot aqueous solution is less than 5 times the dissolution rate of the polyester multifilaments A and C, the weight loss of the polyester multifilaments A and C during the alkaline hot water treatment is too advanced, and the texture is rough. Is not preferable. More preferably, the dissolution rate of the polyester multifilament B in the alkali hot aqueous solution is 10 times or more higher than the dissolution rate of the other constituent polyester multifilaments.

The polyester multifilament B contained in the polyester composite processed yarn of the present invention has a yarn length of 2.0 (%) as compared with other constituent polyester multifilaments A.
It is necessary to be smaller than that. This is for softening the surface touch of the composite processed yarn woven or knitted fabric and for giving it a bulging feeling. Polyester multifilament B has other composition than polyester multifilament 2.0
If it is not longer than (%), the soft feel and swelling of the surface touch will not be satisfied. More preferably 4.0 (%)
That is all. However, when it exceeds 15 (%), the feeling of stickiness becomes strong, and the feeling of stickiness cannot be eliminated unless the number of twists of the additional twist is extremely increased, which is not preferable.

It is preferable that a part or all of the filaments constituting the polyester composite textured yarn of the present invention is subjected to a fluid entanglement treatment. The fluid entanglement treatment improves the unwindability of the composite processed yarn from the package. In addition, polyester multifilaments B and C constituting the composite processed yarn
It is preferable that the constituent filaments of and are mixed and intermixed as uniformly as possible. This is because, when the polyester multifilament B is eluted and removed by alkaline hot water treatment after weaving and knitting, voids are evenly formed among the filaments constituting the remaining polyester multifilament C, and a bulging feeling improving effect is provided. If the multifilaments composing the polyester multifilaments B and C are not mixed and intermingled, voids cannot be provided between the constituent filaments of the polyester multifilament C even if the polyester multifilament B is eluted and removed, so that a bulging feeling The effect of improvement becomes thin. This is particularly important because the polyester composite processed yarn of the present invention is often knitted and woven after additional twisting.

[0012] Although extra bulkiness can be removed by additional twisting of the polyester composite processed yarn, the tightness of the constituent filaments is strengthened and the texture is hardened. After weaving and weaving it, weight reduction processing with alkaline hot water treatment improves the softness and swelling feeling, but the filaments that compose polyester multifilament B and C that are relatively located in the core part in the composite processed yarn By eluting and removing the polyester multifilament B in a mixed and mixed state, it is possible to satisfy the soft feeling and the swelling feeling while maintaining a firm and elastic feeling without making the constituent filaments of the polyester multifilament C too thin. it can. In order to obtain the above effect more remarkably, the polyester multifilaments B and C are subjected to a fluid entanglement treatment in advance, and then, the polyester multifilament A is subjected to a composite false twisting process, and if necessary, before the composite false twisting process. , And / or the fluid confounding process may be performed again later.

Twist migration due to actual twist has the same effect as the fluid entanglement treatment. Therefore, it is preferable that some or all of the filaments constituting the composite textured yarn are provided with a real twist.

Polyester multifilament A located relatively in the sheath portion in the polyester composite processed yarn of the present invention
The monofilament denier is preferably relatively small in order to soften the surface touch, and is preferably 0.1 denier or more.
3.0 denier is preferred. The monofilament denier of the polyester multifilament C located relatively in the core portion in the polyester composite processed yarn is preferably relatively large in order to obtain a feeling of tightness, and is 2.0 denier or more 10.0.
Denier or less is preferable. It is preferable that the monofilament denier of the polyester multifilament B, which is relatively located in the core portion in the polyester composite processed yarn and is eluted and removed after the alkaline hot water treatment, is 1.0 denier or more. This is related to the size of the voids after elution and removal. When the polyester multifilament B is eluted and removed by the alkaline hot water treatment, voids are mainly provided between the constituent filaments of the polyester multifilament C, but the monofilament denier of the polyester multifilament B is 1.0 denier. When it is less than the above range, the voids become small and the effect of improving the swelling feeling becomes small. However, if the monofilament denier of the polyester multifilament B is too large, it will be difficult to elute and remove, and the weight loss of the polyester multifilaments A and C after the alkali heat treatment will proceed too much, and a fluffy texture will easily occur, which is not preferable. , 5.0 denier or less is preferable.

The weight ratio of the polyester multifilament B contained in the polyester composite textured yarn of the present invention to the composite textured yarn is preferably 2 (%) to 30 (%). When it is less than 2 (%), the effect of improving the swelling feeling due to the elution and removal becomes small. On the other hand, if it exceeds 30 (%), it is difficult to elute and remove, and the weight loss of the polyester multifilaments A and C proceeds too much, which tends to cause a fluffy texture, which is not preferable. The weight ratio of the polyester multifilaments A and C to the composite processed yarn is 10
(%) Or more is preferable. When the weight ratio of the polyester multifilament A is less than 10 (%),
It becomes difficult to obtain a soft feeling on the surface. When the weight ratio of the polyester multifilament C is less than 10 (%), it is not preferable because the feeling of tightness is not obtained.

The cross-sectional shape of the filaments constituting the polyester multifilaments A and B contained in the polyester composite processed yarn of the present invention is a normal round cross section, a polygonal cross section, a multilobal cross section, a flat cross section, a hollow cross section, or other special irregular cross section. Anything is applicable. The cross-sectional shape of the filaments forming the polyester multi-filament C and the cross-sectional shape of the filaments forming the polyester multi-filament B can be any of ordinary round cross section, polygonal cross section, multilobal cross section, flat cross section and other special irregular cross section. Although possible, hollow sections are particularly preferred. This is related to the fact that the polyester multifilament B is eluted and removed by the alkaline hot water treatment after the composite processed yarn is woven and knitted. By removing the polyester multifilament B by elution,
It is preferable that the outer diameter of the constituent filaments is large to some extent, since voids are provided in the composite processed yarn to improve the swelling feeling, but in the case of a solid cross section, the single fiber denier becomes large and it becomes difficult to elute and remove. In addition, there is a problem that the amount of polyester multifilaments A and C is excessively reduced. If the constituent filaments of the polyester multifilament B are made to have a hollow cross section, the single fiber denier can be reduced instead of the outer diameter of the filament. As a result, the swelling feeling can be obtained and the firmness and elasticity can be easily maintained while the elution and removal are facilitated. Further, the amount of the polymer used can be reduced, which is also preferable from the viewpoint of cost reduction. However, even if the composite false-twisted yarn is a hollow cross-section filament, its significance becomes small if the hollow portion of the filament cross-section after the composite false-twist processing is crushed. Therefore, the hollow portion is retained until after the composite false-twist processing. It is preferable. Therefore, it is better to have a plurality of hollow portions rather than one hollow portion. Particularly, if the polyester multifilament B is composed of filaments having four hollow portions, the hollow portion is easily held until after the composite false twisting process, preferable. The cross-sectional area ratio of the hollow portion in the filament is preferably large, but the hollow portion is preferably retained until after the composite false twisting.

In order to soften the surface touch of the polyester composite processed yarn of the present invention, the breaking elongation of the polyester multifilament A located relatively in the outer peripheral portion is 30 more than the breaking elongation of other constituent polyester multifilaments.
(%) Or more is preferable. More preferably 50
(%) Or more. However, when the breaking elongation of the polyester multifilament A exceeds 300 (%), the difference in dissolution rate between the polyester multifilament B and the polyester multifilament B due to the alkaline hot water treatment tends to be small. It is preferable that the upper limit is about (%).

Next, an example of a method for producing the polyester composite textured yarn of the present invention will be described. The polyester multifilament B contained in the polyester composite textured yarn of the present invention needs to be a multifilament formed of polyester having a higher dissolution rate in an alkaline hot aqueous solution than ordinary polyethylene terephthalate. Such a polyester is a polyalkylene glycol, in contrast to a normal polyester such as polyethylene terephthalate.
It is preferable to add or copolymerize a component such as an isophthalic acid component or a 5-sodium sulfoisophthalic acid component, which increases the dissolution rate of the polyester in an alkali hot aqueous solution. As the polyester multifilaments A and C, those formed from polyester such as ordinary polyethylene terephthalate can be preferably used.

Polyester multifilaments A, B,
Each of C and C is melt-spun, drawn and heat-set if necessary, and then subjected to composite false twisting. After composite false twisting,
The polyester multifilament A needs to have a yarn length of 2.0 (%) or more longer than the other constituent polyester multifilaments. In order to carry out the composite false twisting as described above, it can be obtained not only by making the feed rate of the supplied yarn different among the constituent filaments but also by making the physical properties of the supplied yarn different. When the composite false twisting is performed by making the supply rate of the supply yarn different among the constituent filaments, the supply rate of the polyester multifilament A of the supply yarn is set to be 2.0 (%) or more higher than the supply rates of the other supply yarns.
When the composite false twisting is performed by changing the physical properties of the supplied yarns, the aligned multi-ply twisting is performed on the assumption that the breaking elongation of the polyester multifilament A of the supplied yarns is higher than the breaking elongations of other supplied yarns. Since the polyester multifilament A stretches more easily than the other constituent multifilaments during the composite false twisting process, the yarn length becomes long and relatively forms the outer peripheral portion of the composite processed yarn. Polyester multifilament A
And the difference in breaking elongation between the polyester multifilament having other constitutions is at least 30 (%) or more, preferably 50.
(%) Or more. The larger the difference in breaking elongation is, the larger the difference in yarn length obtained is. However, if it exceeds 270 (%), the feeling of sticking to the fabric becomes strong, which is not preferable. Depending on the configuration of the supply yarn, the composite false twisting process may be performed by draw false twisting.

The polyester composite processed yarn of the present invention is a twisted yarn,
In order to satisfy the post-process passability such as knitting and weaving, it is preferable that the fluid is entangled. It is preferable that the polyester multifilaments B and C have the constituent filaments mixed and intermingled in the composite processed yarn. For this reason, it is preferable that the fluid entanglement treatment is performed. The fluid entanglement treatment may be performed before or after the composite false twisting or both. In order to ensure the mixed and crossed state of the constituent filaments of the polyester multifilaments B and C, the polyester multifilaments B and C are fluid-entangled in advance and, if necessary, the polyester multifilaments A and C are again mixed. After the fluid entanglement treatment, the composite false twisting process may be performed, and if necessary, the composite textured yarn may be further fluid entangled. An air jet nozzle such as a so-called interlacer nozzle or a Taslan nozzle can be preferably used as the fluid entanglement treatment nozzle.

Twist migration due to the real twist brings about the same effect as the fluid entanglement treatment. Therefore, it is preferable that the polyester multifilaments B and C are preliminarily combined and twisted for composite processing. It is also preferable to perform additional twisting on the composite processed yarn in order to prevent the composite processed yarn from sticking.

The false twist number T (T / m) in the composite false twisting process is T × D ^1/2 is 14 when the denier of the composite processed yarn is D.
The range of 000-36000 can be illustrated. The false twisted body may be a pin spindle type, a friction disc type, a cross belt type, an air spindle type, or any other type. The temperature of the heater when fixing the false twist heat depends on the structure of the heater, the yarn speed, the characteristics of the supplied yarn, etc.
In the case of false twisting at a yarn speed of 100 (m / min) using a (cm) heater, about 150 to 250 (° C.) can be exemplified. If necessary, the composite processed yarn may be subjected to a slight relaxation treatment in order to reduce the residual torque of the composite processed yarn.

The polyester composite processed yarn of the present invention is further twisted if necessary, wet-heat set and / or glued if necessary, and knitted or woven. At the time of dyeing, relax, pre-set, and then treat with alkaline hot water. The alkaline hot water treatment elutes and removes the polyester multifilament B contained in the composite textured yarn to improve the feeling of swelling. After dyeing, final setting is performed to obtain finished processed fabric.

[0024]

【Example】

Example 1 Polyethylene terephthalate semi-dal resin was melt-spun using a spinning nozzle having a circular discharge hole, and a speed of 30 was applied.
Collect at 00 (m / min), 110 denier / 18
A highly oriented undrawn multifilament of filaments was obtained. The highly oriented unstretched multifilament was heat-set by stretching to obtain a stretched multifilament of 75 denier / 18 filaments. Similarly, a drawn multifilament of 75 denier / 72 filament was obtained from polyethylene terephthalate semi-dal resin. Polyethylene terephthalate semidal resin copolymerized with 10 (mol%) of isophthalic acid component and polyethylene glycol having an average molecular weight of 20,000 are melt-blended so that the total amount of polyethylene glycol is 10 (% by weight) and dissolved in an alkali hot aqueous solution. A polyethylene resin having a high speed was obtained. The polyester resin was melt-spun using a spinning nozzle having a circular discharge hole and stretch heat set to obtain a 50 denier / 72 filament easily soluble stretched polyester multifilament. The dissolution rate of the easily-dissolved stretched polyester multifilament in the hot aqueous alkali solution was 40 (times) the dissolution rate of the other two types of stretched polyester multifilament.

A composite textured yarn is obtained by using the above-mentioned three types of drawn polyester multifilaments as a feed yarn, in which case a modified Mitsubishi Heavy Industries LS-6 type having two feed rollers per spindle is used. Use a false twisting machine. Stretching 75 denier / 72 filaments Multifilaments of +8.0 (%) were supplied over the peripheral speed of the delivery roller to stretch 75 denier / 18 filaments polyester multifilaments and 50 denier / 72 filaments with high solubility. Polyester multifilament was supplied to the delivery roller in an amount of +1.5 (%) excessively to perform composite false twisting and winding to obtain a composite processed yarn of 208 denier / 162 filament. The false twist direction is Z, the false twist spindle rotation speed is 250,000 (rpm), and the false twist number is 2100 (T).
/ M) and the false twist heat fixing heater temperature was 210 (° C.).
The composite processed yarn is subjected to additional twisting of 1600 (T / m) in the Z direction, subjected to wet heat setting at 85 (° C.) for 40 (minutes), and then used for warp and weft density of 100 (threads / inch). A weave was obtained by weaving a 2/2 twill design with a weft density of 72 (pieces / inch). The raw fabric is relaxed and preset by a conventional method, and then treated with an alkali hot aqueous solution to elute and remove the easily-dissolved stretched polyester multifilament contained in the composite processed yarn, so that the total weight reduction rate becomes 30 (wt%). I chose After that, high-pressure dyeing was performed with a disperse dye, and final setting was performed to obtain a finished processed fabric. The finished cloth was soft and swelling, and was preferable to have a tight and elastic feeling. The results are shown in Table 1. In Table 1, ⊚ indicates very good, ∘ indicates good, Δ indicates pass, and x indicates fail, which was judged by a sensory test by 10 people.

[0026]

[Table 1]

Example 2 The drawn polyester multifilament of 75 denier / 18 filaments and the easily soluble drawn polyester multifilament of 50 denier / 72 filaments in Example 1 were subjected to a fluid entanglement treatment using an interlacer nozzle to form a constituent filament. It was designed so that they would be mixed together. Using the fluid entangled yarn and the 75 denier / 72 filament stretched polyester multifilament in Example 1, a composite false twist was performed. At that time, the fluid entanglement treatment yarn is supplied by +1.5 (%) in excess of the peripheral speed of the delivery roller,
+75 denier / 72 filament stretched polyester multifilament against peripheral speed of delivery roller
An excess supply of 8.0 (%) was made. Before winding the composite processed yarn, fluid interlacing was performed using an interlacer nozzle to obtain a composite processed yarn. Thereafter, in the same manner as in Example 1, a finished processed fabric was obtained. Since the composite textured yarn is subjected to the fluid entanglement treatment, it is superior to the composite textured yarn of Example 1 in the handleability in the post-process, and the texture of the finished texture is similar to that of the finished texture of Example 1. In comparison, the swelling feeling was excellent. In the composite processed yarn in the finish processed fabric, voids were evenly provided between the filaments forming the core. The results are shown in Table 1.

Example 3 The stretched polyester multifilament of 75 denier / 18 filaments and the easily soluble stretched polyester multifilament of 50 denier / 72 filaments in Example 1 were twisted in the Z direction at 200 (T / m). gave. Then, the false twisted yarn obtained and the easily dissolvable stretched polyester multifilament of 75 denier / 72 filaments were used for composite false twisting. At that time, the combined twisted yarn was supplied in excess of +1.5 (%) with respect to the peripheral speed of the delivery roller, and the stretched polyester multifilament of 75 denier / 72 filaments was +8.0 with respect to the peripheral speed of the delivery roller.
(%) Oversupply was made. Before winding the composite processed yarn, fluid interlacing was performed using an interlacer nozzle to obtain a composite processed yarn. After that, in the same manner as in Example 1,
I got the finishing process. The finished fabric had an improved swelling feeling as compared with the finished fabric of Example 1. The results are shown in Table 1.

Example 4 The readily soluble stretched polyester multifilament of 50 denier / 72 filaments in Example 2 was changed to an easily soluble stretched polyester multifilament of 50 denier / 24 filament composed of circular cross-section filaments, and the like. Is 208 denier / as in Example 2.
A 114-filament composite textured yarn was obtained and a finished texture was obtained. Regarding the composite textured yarn in the finished fabric, voids are evenly provided between the filaments forming the core, and the size of the voids is larger than that in Example 2,
It was clear and preferable because the swelling feeling was further improved as compared with the finishing finish of Example 2. The results are shown in Table 1.

Example 5 In place of the 50 denier / 24 filament easily-dissolved stretched polyester multifilament composed of the circular cross-section filaments in Example 4, the total hollow area has a cross-sectional area of 30 (%) 4. Changed to 50 denier / 24 filament easily soluble stretched polyester multifilament composed of filaments having hollow portions
A composite processed yarn was obtained in the same manner as in Example 4, and a finished processed fabric was obtained. Larger and clearer voids are provided between the filaments forming the core of the composite textured yarn in the finish textured fabric than in the composite textured yarn in the finished textured fabric of Example 4, and are performed with a feeling of swelling. It was preferable because the finishing process of Example 4 was further improved. The results are shown in Table 1.

Example 6 With 75 denier / 72 filaments composed of polyethylene terephthalate semidal filaments having a circular cross section, a highly oriented unstretched multifilament (breaking elongation 120 (%)) with a spinning take-up speed of 3000 (m / min) was used. 75 denier / 18 filaments stretched polyester multifilaments (elongation at break 35 (%)) and 4 in Example 5
Fluid entanglement treatment of three kinds of polyester multifilaments with 50 denier / 24 filaments easily soluble polyester multifilaments (elongation at break 35%) composed of filaments having hollow portions Then, the composite false twisting process was performed. The yarn feed rates of the three types of yarn feed were substantially the same, and were +1.5 (%) with respect to the peripheral speed of the delivery roller. Other composite false twist conditions were the same as in Example 5. Carefully split the composite processed yarn, and for each denier of the multifilament, 1 /
When a load of 30 (g / denier) was applied and the yarn length was measured, it was found that the highly oriented unstretched multifilament of 75 denier / 72 filaments was 6.2 (%) longer than the other two stretched multifilaments. there were. The composite processed yarn was subjected to additional twisting, weaving and alkaline hot water treatment in the same manner as in Example 1 to obtain a finished processed fabric. The finished fabric is Example 5
It was extremely preferable in that the soft touch on the surface was further improved as compared with the case of finishing processing. The results are shown in Table 1.

Comparative Example 1 Two of 75 denier / 72 filaments drawn polyester multifilament and 75 denier / 18 filaments drawn polyester multifilament in Example 1
A composite false twist was made using only the seeds. At that time, 75 denier /
72 filament extended multifilament was supplied by +8.0 (%) excess to the peripheral speed of the delivery roller.
+1.5 to 5 denier / 18 filament drawn polyester multifilament for delivery roller
(%) Excessive supply was carried out to carry out composite false twisting and winding to obtain a composite processed yarn of 157 denier / 90 filaments. False twist number is 2
It was changed to 400 (T / m). After that, additional twisting and weaving were performed in the same manner as in Example 1 to obtain a raw fabric. When the weight loss rate by alkaline hot water treatment is set to 5 (% by weight), the feeling of swelling is insufficient, and when the weight loss rate is increased, the feeling of tightness is insufficient, which is inferior to the finishing finish in Example 1. Met. The results are shown in Table 1.

Comparative Example 2 The three kinds of drawn polyester multifilaments in Example 1 were aligned and all the supplied drawn polyester multifilaments were +1.5 (%) with respect to the peripheral speed of the delivery roller.
The yarn was then fed and the composite false twisting process was performed. The obtained composite processed yarn did not substantially have a core-sheath structure. The composite processed yarn was further twisted and woven in the same manner as in Example 1 and treated with alkali hot water to obtain a finished processed fabric. Compared with the finished fabric of Example 1, the finished fabric had a soft feeling on the surface. The results are shown in Table 1.

[0034]

The polyester composite textured yarn of the present invention is a composite false twist textured yarn in which a part of the constituent filaments of the composite false twist textured yarn having a core-sheath structure is a polyester filament having a high dissolution rate in an alkaline hot aqueous solution. After weaving and weaving,
By elution and removal of the polyester filament, which has a completely high dissolution rate by alkali weight reduction processing, the filaments that make up the core do not become too thin, and while maintaining a firm and elastic feel, it has a soft and swelling texture. It is designed so that it can be put out. The polyester composite processed yarn of the present invention has a wide range of uses such as clothing and daily life applications.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Ryoji Nakamura 1-1-1, Katata, Otsu City, Shiga Prefecture Toyobo Co., Ltd.

Claims (7)

[Claims] 1. A composite processed yarn having false twist crimps composed of three or more types of polyester multifilaments, wherein the polyester multifilament A contained in the composite processed yarn has a yarn length longer than those of other constituent polyester multifilaments. The polyester multi-filament yarn B is 2.0 (%) or more long, and the dissolution speed of the polyester multi-filament B contained in the composite yarn is 5 times or more higher than that of the other constituent polyester multi-filaments in the alkaline hot aqueous solution. 2. A fluid entanglement treatment is applied to a part or all of the filaments constituting the composite textured yarn.
Described polyester composite yarn. 3. The real twist is applied to a part or all of the filaments constituting the composite processed yarn.
Described polyester composite yarn. 4. The polyester composite textured yarn according to claim 1, wherein the polyester multifilament B contained in the composite textured yarn has a single fiber denier of 1.0 denier or more. 5. The weight ratio of the polyester multifilament B contained in the composite processed yarn to the composite processed yarn is 2.
(%) To 30 (%), The polyester composite processed yarn according to any one of claims 1 to 4. 6. The polyester composite processed yarn according to claim 1, wherein a cross section of a filament constituting the polyester multifilament B contained in the composite processed yarn has a hollow portion. 7. The break elongation of the polyester multifilament A contained in the composite processed yarn is 30 (%) or more higher than the break elongation of other constituent polyester multifilaments. Described polyester composite yarn.