JP3476335B2 - Acetate strong twisted composite false twisted yarn and woven / knitted fabric using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acetate strong twist yarn-like composite false twist which has a delicate sharpness and excellent drapeability, and also has a soft and bulky texture, and gives a woven or knitted fabric a surface irregularity like a spun yarn. The present invention relates to a textured yarn and a woven or knitted fabric using the textured yarn.

[0002]

2. Description of the Related Art A cool feeling material having a dry feeling, a dry feeling, and a tight feeling is generally obtained by applying a real twist using a twisting machine, but the number of set twists is increased to increase such a texture. By doing so, the productivity is lowered, and the texture is rough and rigid, and the feeling of lightness tends to be poor. Generally, this woven or knitted product aims for a uniform surface morphology.

Therefore, various methods have been proposed for leaving the actual twist by the false twist method. In the normal steady false twisting process, a method of forming a false twist slab, a method of forming an SZ alternating twist with a short length of about several cm or less by using a fusion temperature condition, and a non-steady false twist method are used. It is roughly classified into a method of forming a long pitch SZ alternating twist of cm or more.

A method for producing a false twist slab is, for example, Japanese Patent Publication No. 45-28018 or Japanese Patent Publication No. 47-4945.
A large number of proposals such as Japanese Patent No. 4 have been proposed. Specifically, this is a method of increasing the supply amount of the filament yarn to the core yarn and strongly winding the filament yarn around the core yarn to form a slab. Since the number of twists in the slab portion is fixed to the twisting direction and is not untwisted, the middle portion other than the slab portion is in the overtwisted state, and the SZ alternating twist is formed.
However, although this textured yarn has a linen-like texture, it does not give the woven or knitted fabric a spun yarn-like surface unevenness.

A method for forming an SZ alternating twist having a short length of about several cm or less by using a fusion temperature condition is disclosed in, for example, Japanese Patent Laid-Open No. 52-70143 and Japanese Patent Laid-Open No. 56-910.
No. 18, gazettes have been proposed. Specifically, a false twist heat fixing temperature is set to a high temperature near the fusion temperature, or an acrylonitrile-based synthetic fiber having an uncertain melting temperature or a partially undrawn yarn having a low melting temperature. Is a method of forming a non-twisted portion and an overtwisted portion by performing high-temperature fusion false-twisting using the above, etc., and untwisting occurs due to mutual fusion between filaments. This processed yarn is excellent in sharpness when there are many un-excessive untwisted parts, but it has the drawback of being too tight and inferior in drapability, and it has a short length of several cm or less.
Since it is Z alternate twist, it does not give the woven and knitted fabric a feeling of spun yarn-like surface unevenness. When the number of un-extracted untwisted parts is small, the bulkiness is high, but a strong twist texture cannot be obtained.

A method of forming an SZ alternating twist having a long length of several tens of cm or more by an unsteady false twist method is disclosed in, for example, Japanese Patent Publication No. 3-75648, Japanese Patent Publication No. 3-17934, and Japanese Patent No. 2533084. Has been proposed to. Specifically, it is an unsteady false twist in which the number of false twists is positively changed by using an air swirling flow, but this processed yarn is inferior in heat fixability because there is no mutual fusion of filaments in the SZ twisted portion. When it contains acetate fibers, the yarn does not bundle well, and under the condition that tension such as weaving is applied, the number of twists tends to cancel each other in the alternating twisting conversion part, and the bulky untwisted part tends to exist, resulting in lack of crispness. It is easy to become.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, imparts a spun yarn-like surface unevenness to a woven or knitted fabric, is bulky, and has both sharpness and drapeability, and has a yarn bundleability. And a woven or knitted product thereof, which has a good acetate strong twist yarn-like composite false twisted textured yarn.

[0008]

SUMMARY OF THE INVENTION An acetate strong twist composite false twisted yarn according to the present invention which solves the above problems is an acetate composite false twisted yarn in which an SZ alternating twist is twisted on a multifilament yarn containing an acetate yarn. In the yarn, the multi
The filament yarn is thick polyester yarn, easy-to-dye poly
Ester yarn, normal pressure dyeable polyester yarn, highly oriented polyester
Includes one or more selected from un-stretched yarn
A non-untwisting unit 1 and 40~150cm over-untwisting unit 2 of 0~150cm are formed alternately along the fiber longitudinal direction, unresolved
The sum of the lengths of the twisted portion 1 and the overtwisted portion 2 is the total length of the yarn.
To 70% to 95%, and a fused portion is formed on at least part of the core of the untwisted portion 1 and / or the overtwisted portion 2, and the untwisted portion 1 and the overtwisted portion 2 5 including an untwisted portion 4 of 1 to 50 mm and an overtwisted portion 5 of 1 to 50 mm between
It is characterized by having a mixed structure part 3 of ˜30 cm.

According to the present invention, a strong twisted yarn-like composite false-twisted yarn which imparts a spun yarn-like surface unevenness to a woven or knitted fabric, is bulky, has a sharpness and a drape property, and has a good yarn converging property. Provided.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic diagram showing an example of an acetate strong twist yarn composite false twisted yarn of the present invention. An untwisted twisted portion 1 in a twisting direction, an overtwisted twisted portion 2 in a twisting direction, and a mixed structure portion 3 are shown. have.

The mixed structure portion 3 includes an untwisted portion 4 and an overtwisted portion 5. All of these lengths are 1 to 50 mm. With such a length, good post-process passability can be obtained.

The mixed structure section 3 may further include an opening section 6 having a length of 50 mm or less. Here, the spread portion 6 refers to a substantially untwisted portion having a yarn length of 10 T or less per 10 mm.

The acetate false twist composite false twisted yarn of the present invention has a fused portion on at least a part of the core portion of the residual twist portion. As a result, it is possible to obtain good sharpness, texture, and converging property instead of rough and rigid. The formation of the fused portion is achieved by combining an acetate yarn and a specific yarn.

This specific yarn has the property of being easily thermally deformed at a relatively low temperature, has a poor heat setting property, and has a composite form with an acetate yarn having a low yarn strength. A fused portion can be formed on the portion.

The acetate strong twist yarn composite false twisted yarn of the present invention can be produced, for example, by the method disclosed in JP-A-8-284033. FIG. 2 shows an example of an apparatus for producing the textured yarn of the present invention. 2 in this figure
A plurality of multi-filament yarns E and F are passed through the magnet tensor 21 in a state where they are aligned and given a constant tension.
The false twisting process is performed with and is taken up by the first delivery roller 26. Then, heat is set by the second heater 27, passed through the second delivery roller 28, and wound by the winder 29.

In the case of ordinary false twisting, the twisting and untwisting numbers of the false twisting spindle are equal, and the yarn H is a crimped untwisted portion. On the other hand, in the production of the false twist textured yarn of the present invention, the actual twist is left by instantaneously increasing or decreasing the number of revolutions in the same direction without stopping the rotation of the false twist spindle. That is, when the false twist spindle speed is instantly decreased, untwisted twists in the twisting direction remain, and when the false twist spindle speed is instantly increased, the number of twists held by the yarn H is increased. Since the above is untwisted, the over-twisted twist in the untwisting direction remains in the yarn G.

Here, when the number of false twist spindle rotations is changed, a twist direction reversal portion in which the number of false twists and the number of untwisting are equal to each other is generated. Usually, such a twist direction reversal portion is an open area in which the constituent fibers are less entangled and the yarn is cracked, resulting in poor passability in the post-process and lack of sharpness. Therefore, it is desirable to make the length of the twist direction reversal portion as short as possible. This can be achieved by instantaneously switching the false twist spindle rotation speed as described above. This allows
It is possible to realize a structure in which the twist direction reversal portion is short and the constituent fibers are often entangled, which is a feature of the false twisted yarn of the present invention.

In the present invention, the mixed structure portion is formed in the twist direction conversion portion from the untwisted portion to the overtwisted portion under the momentary low tension due to the rapid decrease in the false twist number. The mixed structure portion includes untwisted portions and overtwisted portions having a short length of 1 to 50 mm. You may include the opening part of 50 mm or less in length. Further, in the twist direction conversion portion from the overtwisted portion to the untwisted portion, the acetate yarn, which is a low shrinkage constituent filament, tends to have an SZ alternating winding structure under a high twist number condition.

The mixed structure part 3 in the present invention has 5 to 30 parts.
cm, preferably 10 to 30 cm, and the untwisted portion 1 and the untwisted portion 2 are both 40 to 150 cm. Thereby, the post-process passability is improved, bulkiness is suppressed, and lack of sharpness can be eliminated. The sum of the lengths of the untwisted portion 1 and the overtwisted portion 2 is 70 with respect to the length of the entire yarn.
% Or more and 95% or less, preferably 70% or more 9
It is more preferable to set it to 0% or less. This ratio is 70
When it is less than%, the proportion of the mixed structure portion 3 becomes large, and a bulky yarn-like texture with a large amount of bulge may be produced, and a strongly twisted yarn-like texture may be reduced. On the other hand, when it is 95% or more, the unevenness and swelling feeling of the bulky part are insufficient, and the surface of the woven or knitted fabric becomes relatively soft, which is not preferable.

Untwisted portion 1, untwisted portion 2 and mixed structure portion 3
The above length can be achieved by appropriately adjusting the switching time of the false twist spindle rotation speed.

The acetate yarn in the present invention means a semi-synthetic fiber such as diacetate or triacetate.

Examples of the multifilament yarn other than acetate yarn used in the present invention, polyesters, polyamides, synthetic O維multifilament yarns such as polyacrylonitrile are used, FutoshiHoso polyester yarn, easy dyeable polyether
It is preferable to include at least one selected from the group consisting of steal yarn , polyester dyeable under atmospheric pressure, and unoriented yarn of highly oriented polyester. This is because it is possible to improve the bundling property and texture of the processed yarn.

The thick and thin polyester yarn used in the present invention is 3
It is preferable to use a high-dispersion type thick and thin polyester yarn in which a chic portion having a frequency of a yarn spot wavelength of 0 cm or less and 45% or more remains. This is because the fusion structure is obtained by the chic portion having a low fusion temperature, and therefore, if the chic portions are dispersed appropriately, the converging property in the mixed structure is further improved. Further, it is more preferable that the unstretched polyester yarn having a birefringence of 0.015 to 0.040 is obtained by two-stage stretching under the conditions satisfying the following (1) to (5). (1) MDR × 0.45 ≦ TDR ≦ MDR × 0.55 (2) TDR = DR1 × DR2 (3) MDR × 0.40 ≦ DR1 ≦ MDR × 0.50 (4) HRT ≦ TC (5) Tg ≤ HPT ≤ TC (where TDR is the total draw ratio, DR1 is the first draw ratio, DR2 is the second draw ratio, MDR is the maximum draw ratio of the polyester undrawn yarn, and HRT is the first draw ratio. Temperature (° C), HPT is the temperature (° C) during the second drawing, TC
Is the crystallization temperature (° C) of the polyester undrawn yarn, Tg
Is the glass transition temperature (° C.) of the polyester undrawn yarn. )

The thick and thin polyester yarn according to the present invention preferably has the following physical properties. That is, the crystallinity of the thick portion is 5 to 15%, more preferably about 10%, and the thin portion is 18 to 28%, further preferably about 24%. The birefringence of the chic part is 0.015 to 0.05
0 , more preferably about 0.020 , and the thin portion is about 0.060 to 0.200 , further preferably about 0.160 .

Since the fused structure is obtained by the chic portion having a low fusion temperature, if the crystallinity of this chic portion is 5% or less, the deterioration property of the fiber over time is high and the practicality is poor, and 15% or more. If so, it is difficult to expect fusion characteristics. Similarly, if the birefringence is 0.015 or less, the fiber deteriorates with time and is not practical, and if it is 0.050 or more, it is difficult to expect the fusion property.

Atmospheric pressure dyeable polyester yarn according to the present invention
Is preferably a polyester dye which is obtained by copolymerizing an adipic acid component in an amount of 10 to 20 mol%, and which is dyed at atmospheric pressure and satisfies the following (1) to (3). (1) The tan δ peak temperature measured by dynamic viscoelasticity is 90.
The temperature is not less than ℃ and not more than 120 ℃. (2) The dyeing saturation temperature in dyeing with a disperse dye is 80 ° C.
It is above 110 ° C. (3) DS × DE ^1/2 ≧ 22 (however, DS indicates fiber strength and DE indicates breaking elongation)

When the tan δ peak temperature is 90 ° C. or lower,
Alternatively, when the dyeing saturation temperature in dyeing with the dispersed sample is 80 ° C. or lower, the yarn formability is poor and the practicality is poor. Also ta
When the nδ peak temperature is 120 ° C. or higher, or when the dyeing saturation temperature in dyeing the dispersion sample is 110 ° C. or higher, it is difficult to obtain a fused portion in the acetate strong twist-like composite false twisted yarn, which is not preferable.

Further, the easily dyeable polyester of the present invention
The yarn is preferably an easily dyeable polyester yarn satisfying the following (1) and (2). (1) Elongation 22 to 55%, birefringence 0.08 to 0.12.
Is. (2) The tan δ peak temperature measured by dynamic viscoelasticity is 10
The tan δ peak value is 0.13 at 5 ° C to 120 ° C.
It is 0 or more and 0.200 or less. It is preferable that the polyester yarn is directly wound after being spun at a speed of 6000 m / min or more by a high-speed winding machine.

[0029]

The present invention will be specifically described with reference to the following examples.

Example 1 A triacetate yarn (bright 150d / 24f) and a thick and thin polyester were used by using a false twisting machine shown in FIG. Yarn (Semi-Dal 100d / 72f: glass transition temperature 71 ° C measured by dilatometry, crystallization temperature 1 measured by scanning calorimeter)
First stage drawing (stretching ratio 1.647, temperature 100 ° C.), second stage drawing (stretching ratio 1.01, temperature) 105 ° C.), high-dispersion type thick and thin polyester yarn with a chic portion having a yarn unevenness wavelength of 30 cm or less and a frequency of 47%) is used, and the yarn tension is 7 g / Y (false twist spindle rotation) by a magnet tensor. Number constant), 1st heater temperature 185 ° C, 1st delivery roller speed 40m / min, 2nd heater temperature 290 ° C, 5% overfeed ratio between 1st delivery roller / 2nd delivery roller, false twist spindle Rotational speed increase / decrease range 500-2
The false twisting process was performed under the conditions of 800 T / m (Z twisting direction) and the false twisting spindle rotation speed switching time randomly changed within a range of 1 to 2 seconds.

The textured yarn of the present invention obtained is the untwisted portion 1
(Z twisted portion) and overtwisted portion 2 (S twisted portion) have a length of 60 to 1
It was in the range of 40 cm. Moreover, the mixed structure part 3 of the untwisted part, the overtwisted part, and the opening part having a length of 25 mm or less is irregularly 1
There was 0 to 20 cm. In particular, the open part is up to 25 mm
At this time, the proportion occupied by the parts A and B was 85%. In addition, a high-dispersion type thick and thin polyester yarn is unevenly distributed in the core portion of the processed yarn of the present invention, and particularly in the residual twist portion, the highly dispersed chic portions of each single filament are fused to each other. Confirmed by observation. The obtained textured yarn was not coarse and rigid, had a good crispness and texture, and was excellent in yarn form stability. Using this processed yarn,
The plain knitted fabric was knitted by a circular knitting machine (24G, 44 inch) and dyed at 120 ° C. In addition to the apparent thick and thin spots of the processed yarn, this knitted fabric has dark and light spots due to the highly dispersed thick and thin polyester, so that it has a spun yarn-like unevenness with a rich surface change and a swelling feeling, and It was a silky-spun knitted fabric with a strong twisted yarn tone that had both sharpness and drape.

Example 2 Triacetate yarn (Bright 150d / 24f) and atmospheric dyeable polyester yarn (Semidal 75d / 36f: polyester copolymer copolymerized with 16% by weight of adipic acid component, glass measured with a scanning calorimeter) Transition temperature 47 ° C., melting point 220 ° C., tan δ peak temperature 99 ° C. measured by dynamic viscoelasticity, dyeing saturation temperature in dyeing with disperse dyes 90 ° C., DS × DE ^1/2 = 25.9
A textured yarn was obtained in the same manner as in Example 1 except that the temperature of the first heater was 190 ° C. (however, DS is the fiber strength and DE is the breaking elongation).

In the obtained textured yarn of the present invention, the length of the untwisted portion 1 and the overtwisted portion 2 is in the range of 45 to 125 cm,
Moreover, the mixed structure part 3 of the untwisted part, the overtwisted part, and the opening part having a length of 1 to 30 mm or less is irregularly present in an amount of 15 to 30 cm, and particularly the opening part has a maximum length of 30 mm. The proportion occupied by parts A and B was 75%. Further, the polyester yarn dyeable under normal pressure was unevenly distributed in the core portion of the processed yarn of the present invention, and in the residual twist portion, it was partially fused particularly in the core portion. The obtained textured yarn was not coarse and rigid, had a good crispness and texture, and was excellent in yarn form stability. The knitted fabric knitted in the same manner as in Example 1 and dyed at 110 ° C., in addition to the apparent thick and thin spots of the processed yarn, the triacetate part is light and rich in glossiness, and the color difference from the atmospheric pressure dyeable polyester yarn becomes clear. As expressed, it was a silky-spun knitted fabric with a strong twisted yarn tone, which has a spun yarn-like unevenness with abundant surface changes and a swelling feel, while having a sharp feel and drape.

[Example 3] Using a triacetate yarn (Bright 100d / 26f) and an easily dyeable polyester yarn (Bright 50d / 36f, manufactured by Asahi Kasei Co., Ltd.) which is an ultra-high speed spinning polyester yarn, the first heater temperature 190 ℃, false twist spindle rotation speed increase / decrease range 900-3500 T / m
The present processed yarn was obtained in the same manner as in Example 1 except that (Z twist direction) was adopted.

The obtained textured yarn of the present invention has an untwisted portion 1
(Z twisted portion) and overtwisted portion 2 (S twisted portion) have a length of 60 to 1
It was in the range of 40 cm. Moreover, the mixed structure part 3 of the untwisted part, the overtwisted part and the open part having a length of 50 mm or less is irregularly 1
There was 0 to 25 cm. In particular, the open part is up to 50 mm
At this time, the proportion occupied by the parts A and B was 72%. Further, the easily dyeable polyester yarn was unevenly distributed in the core portion of the processed yarn of the present invention, and in the residual twist portion, it was partially fused particularly in the core portion. The obtained textured yarn was not coarse and rigid, had a good crispness and texture, and was excellent in yarn form stability. A knitted fabric that was knitted and dyed in the same manner as in Example 1 had a silky-spun knitted fabric of a strong twisting yarn-like texture having a fluffy and fluffy texture with a variation in spun yarn-like texture with various surface variations. Met.

[Example 4] Triacetate yarn (Bright 150d / 24f) and highly oriented polyester undrawn yarn (Semidal 80d / 36f: birefringence 0.052) were used, except that the first heater temperature was set to 180 ° C. This processed yarn was obtained in the same manner as in Example 1.

The obtained textured yarn of the present invention has an untwisted portion 1
(Z twisted portion) and over-twisted portion 2 (S twisted portion) have a length of 50 to 1
It was in the range of 40 cm. Moreover, the mixed structure part 3 of the untwisted part, the overtwisted part, and the open part having a length of 40 mm or less is irregularly 1
There was 0 to 15 cm. In particular, the open part is up to 25 mm
At this time, the proportion occupied by the parts A and B was 80%. Further, the highly oriented polyester undrawn yarn was unevenly distributed in the core portion of the processed yarn of the present invention, and was slightly fused in the residual twist portion.
The obtained textured yarn was not coarse and rigid, had a good crispness and texture, and was excellent in yarn form stability. Using this processed yarn, a knitted fabric was knitted with a circular knitting machine (24G, 44 inch) and dyed at 120 ° C. In addition to the apparent thick and thin spots of the processed yarn, this knitted fabric has a dark and light spot of highly oriented polyester unstretched yarn and triacetate yarn. It was a silky-spun knitted fabric with a strong twisted yarn that had both a sharpness and drape.

Comparative Example Triacetate yarn (Bright 1
50d / 24f) and polyester drawn yarn (Semidal 10)
0d / 48f, strength 4.9g / Y, elongation 27%), the first heater temperature was 190 ° C, the false twist spindle rotation speed switching condition was randomly changed in the range of 0.5 to 1 second. The present processed yarn was obtained in the same manner as in Example 1 except for the above. The obtained textured yarn of the comparative example has an untwisted portion 1 (Z twisted portion).
The length of the overtwisted portion 2 (S twisted portion) was in the range of 20 to 50 cm. Further, the mixed structure portion 3 of the untwisted portion, the overtwisted portion, and the spread portion has a crimped bulky spread portion structure in which the yarn is cracked.
There was 0-60 cm. In particular, the open part is up to 100 m
m, and at this time, the proportion occupied by parts A and B was 45%. Further, the core of the residual twist portion of this processed yarn is not fused, and the twist direction reversal portion has a crimped bulky fiber opening portion structure in which a relatively long yarn crack occurs, resulting in poor yarn form stability. It was
The knitted fabric which was knitted and dyed in the same manner as in Example 1 had a feeling of spun yarn tone, but had a bulky texture and a poor texture.

[0039]

As described above, according to the present invention,
A strong twisted yarn-like composite false-twisted yarn having good passability in the subsequent process, having a delicate sharpness, excellent drapeability, and having a soft and bulky texture and a surface unevenness of a spun yarn tone is provided. It

[Brief description of drawings]

FIG. 1 is a yarn side view diagram showing an example of an acetate strong twist yarn composite false twisted yarn of the present invention.

FIG. 2 is a schematic side view showing an example of an apparatus for producing the acetate false twist composite false twisted yarn of the present invention.

[Explanation of symbols]

1 Untwisted Part 2 Overtwisted Part 3 Unstructured Part with 1-50 mm Length, Overtwisted Part, Mixed Structure Part 4 1-50 mm Untwisted Part 5 1 Over-twisted portion 6 with a length of 50 mm Opening portion 21 with a length of 1 to 50 mm Magnet tensor 22, 23 Guide 24 First heater 25 False twist spindle 26 First delivery roller 27 Second heater 28 Second delivery Roller 29 Winder

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuhiro Yamaguchi, Inventor Nobuhiro Yamaguchi 4-chome 1-chome, Sunadabashi, Higashi-ku, Nagoya, Aichi Mitsubishi Rayon Co., Ltd. Product Development Research Center (72) Takashi Fukuzawa, Tenmabashi, Kita-ku, Osaka-shi, Osaka 8-30, Osaka Branch of Mitsubishi Rayon Co., Ltd. (56) Reference JP-A-8-284033 (JP, A) JP-A-53-98450 (JP, A) JP-A-58-191235 (JP, A) Kai 57-191335 (JP, A) JP 58-81639 (JP, A) JP 9-78380 (JP, A) Actual 58-121383 (JP, U) (58) Fields investigated (58) Int.Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-1/22

Claims (6)

(57) [Claims] 1. An acetate composite false twisted yarn in which an SZ alternating twist is twisted on a multifilament yarn including an acetate yarn, wherein the multifilament yarn is thick and thin.
Reester yarn, easily dyeable polyester yarn, atmospheric pressure dyeable polyester
Choose from steal yarn and highly oriented polyester undrawn yarn
40 to 150 cm untwisted part 1 including gaps or more
And untwisted portions 2 of 40 to 150 cm are formed alternately along the longitudinal direction of the fiber, and the lengths of the untwisted portion 1 and the overtwisted portion 2 are long.
The sum of sasage is 70% to 95% with respect to the length of the entire yarn.
A fusion-bonded portion is formed on at least a part of the core of the untwisted portion 1 and / or the overtwisted portion 2, and between the untwisted portion 1 and the overtwisted portion 2 is 1 to 50 mm. Untwisted part 4 and 1 to 50 mm
And a mixed structure portion 3 having a size of 5 to 30 cm including the overtwisted portion 5 of 1. 2. The multifilament yarn includes a thick and thin polyester yarn, and the thick and thin polyester yarn has a thickness of 30 cm.
The acetate false twist composite false twisted yarn according to claim 1, which is a thick and thin polyester yarn in which a chic portion having a frequency of the following uneven yarn wavelength of 45% or more remains. 3. The thick and thin polyester yarn is obtained by drawing a polyester undrawn yarn having a birefringence of 0.015 to 0.040 in two stages under the following conditions (1) to (5). The acetate false twist yarn-like composite false twisted yarn according to claim 2, which is a thick and thin polyester yarn. (1) MDR × 0.45 ≦ TDR ≦ MDR × 0.55 (2) TDR = DR1 × DR2 (3) MDR × 0.40 ≦ DR1 ≦ MDR × 0.50 (4) HRT ≦ TC (5) Tg ≤ HPT ≤ TC (where TDR is the total draw ratio, DR1 is the first draw ratio, DR2 is the second draw ratio, MDR is the maximum draw ratio of the polyester undrawn yarn, and HRT is the first draw ratio. Temperature (° C), HPT is the temperature (° C) during the second drawing, TC
Is the crystallization temperature (° C) of the polyester undrawn yarn, Tg
Is the glass transition temperature (° C.) of the polyester undrawn yarn. ) 4. The multifilament yarn includes a normal pressure dyeable polyester yarn, and the normal pressure dyeable polyester yarn comprises:
2. The acetate twist-like composite false twist according to claim 1, which is a polyester yarn made of a polyester copolymer obtained by copolymerizing an adipic acid component in an amount of 10 to 20 mol% and satisfying the following (1) to (3). Processed yarn. (1) The tan δ peak temperature measured by dynamic viscoelasticity is 90.
The temperature is not less than ℃ and not more than 120 ℃. (2) The dyeing saturation temperature in dyeing with a disperse dye is 80 ° C.
It is above 110 ° C. (3) DS × DE ^1/2 ≧ 22 (however, DS indicates fiber strength and DE indicates breaking elongation) 5. The multifilament yarn contains an easily dyeable polyester yarn, and the easily dyeable polyester yarn is an easily dyeable polyester yarn satisfying the following (1) and (2).
The acetate strong twist yarn-like composite false twist textured yarn according to claim 1 . (1) Elongation 22 to 55%, birefringence 0.08 to 0.12.
Is. (2) The tan δ peak temperature measured by dynamic viscoelasticity is 10
The tan δ peak value is 0.13 at 5 ° C to 120 ° C.
It is 0 or more and 0.200 or less. 6. The method of claim 1 to 5 acetate strong twisted yarn regulating composite false twisted yarn woven or knitted fabric using of any one.