JP2732785B2 - Random-like pongee-like composite processed yarn and method for producing 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 a natural and swelling pongee-like composite processed yarn comprising at least two thermoplastic synthetic fiber multifilaments and a method for producing the same.

[0002]

2. Description of the Related Art Several methods have been proposed for obtaining a pongee-like composite processed yarn using synthetic fibers. For example, in Japanese Patent Publication No. 61-31219, using two polyester filament yarns, the other yarn is supplied to the false twisting and twisting zone of one yarn while periodically vibrating, and then false twisting is performed. Has proposed a core-sheath yarn in which a single wound portion and a triple wound portion are alternately formed. Japanese Patent Publication No. 59-29689 also discloses that two polyester filament yarns are used in the same manner as described above, and one yarn is excessively supplied to the false twisting and twisting zone while periodically vibrating. A core-sheath yarn in which single-wound portions and triple-wound portions are alternately formed by twisting has been proposed.

[0003]

However, the above-mentioned conventional pongee-like composite processed yarn is a core-sheath yarn in which a single-wound portion and a triple-wound portion are alternately formed, but the number of twists in the single-wound portion is constant. And the thickness of the sheath thread is also constant. Therefore, even if the thickness is uneven, the dyed woven or knitted fabric is dominated by the color of the sheath yarn that appears on the surface and becomes monotonous. Met. Therefore, it has been desired for many years to improve the pongee-like composite processed yarn.

[0004] In order to solve the above-mentioned conventional problems, the present invention has a feeling of swelling and a natural unevenness, and a woven or knitted fabric after dyeing has a rich color change and a refreshing feeling. It is an object of the present invention to provide a randomly processed composite yarn that can be expressed and a method for producing the same.

[0005]

In order to achieve the above-mentioned object, at least two types of thermoplastic synthetic fiber multifilaments A and B are provided.
A false-twisted composite yarn having a core-in-sheath structure, wherein the false-twisted composite yarn has a single-wound portion and a triple-wound portion alternately formed in the length direction of the yarn. The number of twists is 500 T / M
Or 1500T / M is in the following range, and number of twists per 1cm of the unit with single winding is the average number of real twist ± 100T / M or less
It is characterized by being unevenly wound with the above variation .

In the above construction, the core yarn is formed of a thermoplastic synthetic fiber multifilament A, the sheath yarn is formed of a thermoplastic synthetic fiber multifilament B, and the sheath portion B is formed.
The fineness in the longitudinal direction of the single wrapped part and the triple wrapped part is different,
The fineness of the triple wrapped portion is 3% of the fineness of the single wrapped portion of the sheath B
It is preferable that the thickness is larger.

[0007] Next, the method of the present invention for producing a randomly adjusted composite yarn is a method for producing a false twist composite yarn having a core-sheath structure comprising at least two types of thermoplastic synthetic fiber multifilaments A and B. , A yarn has a birefringence Δn of 100
× 10 ^-3 to 140 × 10 using polyester filament consisting of ^{-3, and} a birefringence in the B yarn △ n is 30 × 10 ^-3
~ 70 × 10 ^-3 and Δn is 120 × 10 ^-3 -16
Using a polyester-based filament in which a portion of 0 × 10 ⁻³ is mixed in the length direction, the A yarn is periodically oscillated on the upstream side of the heating area in the false twisting step of the A yarn while the B yarn is vibrated. Then, the twisted yarn is false twisted.
Spindle false twisting located downstream from the heating area of the process
With false twist processing using a single winding part in the length direction of the yarn.
And the triple wound portion are formed alternately, and the single wound portion is formed.
The number of twists is in the range of 500 T / M or more and 1500 T / M or less.
And the number of twists per 1 cm of the single wound portion is the average actual twist.
Non-uniform winding with variation of several ± 100 T / M or more
It is characterized by obtaining a composite yarn attached .

[0008] In the above construction, polyethylene terephthalate highly oriented undrawn yarn (POY) is used as the B yarn,
A portion where the birefringence △ n is 30 × 10 ^-3 to 70 × 10 ^-3 and △
It is preferable to form a filament yarn in which a portion where n is from 120 × 10 ^{−3 to} 160 × 10 ⁻³ is mixed in the length direction of the yarn in a previous step or a separate step which is continuous to the false twisting step.

In the above construction, the yarn B is made of polyethylene
Natural drawing of highly oriented undrawn yarn (POY)
Yarn obtained by stretching within the range of elongation (ND)
It is preferred that

[0010]

According to the construction of the present invention described above, the false twist composite yarn has a single wrap portion and a triple wrap portion alternately formed in the length direction of the yarn, and the number of twists of the single wrap portion is 500 T / M or more 1
It is in the range of 500 T / M or less and the number of twists per 1 cm of the single-wound portion is not uniform, so that a random tone having a natural uneven feeling, a random feeling, a sharp feeling, and a swelling feeling is provided. Pongee-like composite processed yarn can be realized. In addition, by dyeing this fabric, the fabric is rich in variability in color, the variation in thickness unevenness is large, and the number of twists per 1 cm is non-uniform, resulting in a more diverse structure.

The core yarn is formed of a thermoplastic synthetic fiber multifilament A and the sheath yarn is formed of a thermoplastic synthetic fiber multifilament B, and the fineness of the sheath portion B in the longitudinal direction is determined by a single winding portion and a triple winding portion. According to the preferred configuration of the present invention in which the fineness of the triple wrapped portion is 3% or more larger than the fineness of the single wrapped portion, unevenness in thickness can be emphasized and a more random feeling can be exhibited.

Further, the number of twists per 1 cm of the single-wound portion is as follows:
According to the preferred configuration of the present invention in which the average actual twist number ± 100 T / M or more is scattered, the woven or knitted fabric has a more random natural feeling, a swelling feeling and a crisp feeling, and has been dyed. Is rich in color change and can express a feeling of refreshing and swelling.

Next, according to the structure of the manufacturing method of the present invention, B
Polyester filament in which a portion of birefringence Δn of 30 × 10 ⁻³ to 70 × 10 ^{−3 and} a portion of Δn of 120 × 10 ^{−3 to} 160 × 10 ⁻³ are mixed in the length direction of the yarn A polyester filament having a birefringence Δn of 100 to 140 × 10 ⁻³ is used for the A thread, and the B thread is periodically cycled upstream from the heating region in the false twisting step of the A thread. The yarn is combined with the yarn A while being vibrated, and then the twisted yarn is subjected to false twist processing, whereby the pongee composite processed yarn can be efficiently and rationally manufactured. That is, since the single-wound portion and the triple-wound portion are alternately mixed in the length direction of the yarn, the yarn has a random tone.

Further, as the B yarn, polyethylene terephthalate is used.
Rate highly oriented undrawn yarn (POY), and birefringence Δn
Is 30-70 × 10^-3Part and Δn are 120-160 ×
10 ^-3Filament yarn where the part is mixed in the length direction of the yarn
Is formed in a pre-process that is continuous with the false twisting process or in a separate process.
According to a preferred configuration of the method of the present invention,
This makes it possible to efficiently and reasonably manufacture the kumiko style composite processed yarn. sand
That is, the birefringence Δn of the B component yarn is 30 to 70 × 10^-3of
Part and Δn = 120-160 × 10^-3Along the length of the thread
Because they are mixed, a natural unevenness can be exhibited.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically with reference to the drawings. FIG. 1 is a schematic view showing the appearance of a yarn according to one embodiment of the present invention. In FIG. 1, the black yarn is referred to as A yarn, and the white yarn is referred to as B yarn. As shown in FIG. 1, it is a false twist composite yarn having a core-sheath structure composed of two thermoplastic synthetic fiber multifilaments. In the single-wound portion (a), the B yarn has an actual twist number of ± 10 with an actual twist number of 500 T / M to 1500 T / M.
Wound at 0 T / M or more. In the triple-wound portion of (b), the sheath yarn B is triple-wound, and the thickness of the sheath yarn of the triple-wound portion (b) is 3% as compared with the single-wound portion (b). It is thicker.

Next, FIG. 2 shows an example of the manufacturing method of the present invention. In FIG. 2, 1 is an A yarn which is a supply yarn, 2 is a B yarn which is a supply yarn, 3, 4, 7 and 9 are feed rollers (nip rollers), 5 and 8 are heat fixing devices, and 6 is a false twist. An apparatus (for example, a spindle), 10 is a winding roller, and 11 is a yarn package. Reference numeral 12 denotes a periodically vibrating yarn portion, and reference numeral 13 denotes a false twisting step.

As the supply yarn, a drawn yarn is used as the A yarn 1. The birefringence Δn of the B yarn 2 is 30 to 70.
A yarn in which a portion of × 10 ^{-3 and} a portion of Δn = 120 to 160 × 10 ^-3 are mixed in the length direction of the yarn is used.

In the above manufacturing method, a one-step method is adopted.
When using, for example, polyethylene terephthale
Using a highly oriented undrawn yarn (POY)
While the birefringence Δn is 30 to 70 × 10^-3Part and
Δn = 120-160 × 10 ^-3Is the length of the thread
It is also possible to form a mixed yarn to make the B yarn 2.

Next, the B yarn 2 is supplied by the nip roller 4 to the periodically vibrating yarn 12 at an overfeed of 40 to 100%. The reciprocating movement length (vibration length) of the B yarn in the periodic vibrating yarn section 12 is preferably about 5 to 200 mm. According to the false twisting condition, the yarn B is twisted while periodically vibrating along the yarn A as indicated by the arrow 12 in the false twisting process.
By performing false twisting, a composite yarn is formed in which single-wound portions and triple-wound portions are alternately formed.

Thereafter, the yarn is heat-treated by the secondary heat setting device 8 to reduce the torque of the yarn, and the yarn is wound around the package 11 by the winding roller 10 to form a randomly adjusted composite yarn.

Considering the generation mechanism of the pongee-like composite processed yarn in the false twisting section 13, the conventional Japanese Patent Publication No. 61-31 is considered.
In Japanese Patent Publication No. 219, a single-wound portion and a triple-wound portion are alternately generated by supplying a sheath yarn with a constant overfeed to a core yarn. The winding part is also a composite yarn wound around the sheath part, the single false twist part has a uniform number of actual twists, the uniform number of twists even when inspected every 1 cm, and the single winding part is triple. Sheath B of the winding part
Are the same, but in the present embodiment, the number of twists per 1 cm is non-uniform with the average actual twist number ± 100 T / M.
In addition, the thickness of the triple wrapped portion is 3% or more thicker than the single wrapped portion. This is because the thickness of the sheath yarn is non-uniform, and the B yarn has a natural stretching elongation, which will be described later, so that uneven drawing occurs, and in the single-wound portion, uneven twist occurs, and Since the draw ratio is low in the triple winding part,
The thread may be thicker.

Here, the natural stretching elongation will be described. Normal P
When the SS curve (strong elongation curve) of OY is drawn, it becomes as shown in FIG. 3A, and the drawn yarn becomes as shown in FIG. 3B. The part shown in FIG. 3A is a natural stretching elongation ND at a constant strength and elongation. The B yarn is obtained by stretching POY by natural stretching elongation (N
It can be obtained by stretching (incomplete stretching) within the range of D).

Example 1 A 100-denier 48 filament drawn polyethylene terephthalate yarn (A), a portion having a birefringence Δn of 30 to 70 × 10 ⁻³ and a Δn of 120
A polyethylene terephthalate partially drawn yarn (B) (85 denier, 36 filaments) in which a portion of ~ 160 × 10 ^-3 is mixed in the length direction of the yarn was processed using the apparatus shown in FIG. The main conditions are as follows. (1) False twist feed rate 0% (2) Number of false twists 2012 T / M (3) Feed rate of sheath yarn (B yarn) + 70% (4) Heat fixing device temperature of false twist part 200 ° C (5) Relaxing part heat Fixing device temperature 200 ° C (6) Relax feed rate 20% (7) Winding feed rate + 5% The B thread is oscillated to the A thread in the periodic vibration twinning section 12 along the A thread in the drawing. As a result, a single wrapped portion and a triple wrapped portion were alternately formed. The average length of one unit of the single wrapped portion was 24.5 cm, and the same length of the triple wrapped portion was 8.6 cm. The actual twist number of the single-wound portion is 1023 T / M.
It was 0 T / M. In addition, the fineness of the sheath yarn of the single wrapped part is 85
The fineness of the denier triple-wrapped portion was 92 denier.
Further, the number of twists per 1 cm is as shown in the following (Table 1).

[0024]

[Table 1]

When this processed yarn was dyed into a woven fabric,
There was a feeling of unevenness in thickness and color tone, and it was a good pongee-like texture with a natural feeling and a refreshing feeling. (Comparative Example 1) 100 denier, 48 filament drawn polyethylene terephthalate yarn and 75 denier, 36
Processing was performed under the following conditions using a drawn polyethylene terephthalate yarn as a filament. (1) False twist feed rate + 0% (2) False twist number 2,000 T / M (3) Sheath feed rate + 60% (4) Heat fixing device temperature of false twist portion 200 ° C (5) Relax portion heat fixing device temperature 200 ° C (6) Relax feed rate 20% (7) Winding feed rate + 5% When false twisting was performed under the above conditions, single-wound portions and triple-wound portions were alternately generated, but single-wound portions The average number of twists was 980 T / M, but the actual number of twists per 1 cm was the same, and the thickness of the sheath yarn in the single wrapped portion and the triple wrapped portion was also the same.

When this was made into a woven fabric, a swelling-free and uniform-colored uniform cloth was obtained as compared with the product of this example. As described above, the unevenness in the number of twists per 1 cm in the single-wound portion makes it possible to develop a more natural sense of unevenness. By making the yarn thicker, it is possible to produce a woven or knitted fabric having a swelling feeling and a natural feeling with an enhanced slab feeling.

[0027]

As described above, according to the present invention, the false-twisted composite yarn is formed by alternately forming single-wound portions and triple-wound portions in the length direction of the yarn. Due to being in the range of 500 T / M or more and 1500 T / M or less, and the number of twists per 1 cm of the single-wound portion being uneven, a feeling of natural unevenness, randomness, sharpness, and swelling is provided. It is possible to realize a certain random-like pongee-like composite processed yarn. Also,
By dyeing this fabric, rich in color change,
In addition, the variation in thickness unevenness is large, and the number of twists per 1 cm is non-uniform, so that the structure becomes more diverse.

The core yarn is formed of a thermoplastic synthetic fiber multifilament A, the sheath yarn is formed of a thermoplastic synthetic fiber multifilament B, and the fineness of the sheath portion B in the longitudinal direction is determined by a single-wound portion and a triple-wound portion. According to the preferred configuration of the present invention in which the fineness of the triple wrapped portion is 3% or more larger than the fineness of the single wrapped portion, unevenness in thickness can be emphasized and a more random feeling can be exhibited.

Further, the number of twists per 1 cm of the single wound portion is
According to the preferred configuration of the present invention in which the average actual twist number ± 100 T / M or more is scattered, the woven or knitted fabric has a more random natural feeling, a swelling feeling and a crisp feeling, and has been dyed. Is rich in color change and can express a feeling of refreshing and swelling.

Next, according to the production method of the present invention, the yarn having a birefringence index Δn of 30 × 10 ⁻³ to 70 × 10 ⁻³ and Δn
A polyester filament yarn in which a portion of 120 × 10 ^{−3 to} 160 × 10 ⁻³ is mixed in the length direction of the yarn is used.
A polyester filament having a birefringence Δn of 100 to 140 × 10 ⁻³ is used for the yarn, and the yarn B is periodically vibrated on the upstream side of the heating area in the false twisting process of the yarn A. By combining the yarn A with the yarn A and then subjecting the combined yarn to false twist processing, the pongee-like composite processed yarn can be efficiently and rationally manufactured. That is, since the single-wound portion and the triple-wound portion are alternately mixed in the length direction of the yarn, the yarn has a random tone.

Further, polyethylene terephthalate is used as the B yarn.
Rate highly oriented undrawn yarn (POY), and birefringence Δn
Is 30-70 × 10^-3Part and Δn are 120-160 ×
10 ^-3Filament yarn where the part is mixed in the length direction of the yarn
Is formed in a pre-process that is continuous with the false twisting process or in a separate process.
According to a preferred configuration of the method of the present invention,
This makes it possible to efficiently and reasonably manufacture the kumiko style composite processed yarn. sand
That is, the birefringence Δn of the B component yarn is 30 to 70 × 10^-3of
Part and Δn = 120-160 × 10^-3Along the length of the thread
Because they are mixed, a natural unevenness can be exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the appearance of a yarn according to one embodiment of the present invention.

FIG. 2 is a process chart showing a manufacturing method according to one embodiment of the present invention.

FIGS. 3A and 3B are diagrams for explaining the natural stretching elongation; FIG. 3A is a diagram showing strength-elongation characteristics of a polyester highly oriented undrawn yarn (POY); FIG. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 A thread 2 B thread 3,4,7,9 Feed roller (nip roller) 5,8 Heat fixing device 6 False twisting device 10 Winding roller 11 Thread package 12 Periodic vibration plying part 13 False twisting process (A) Single winding part (b) Triple winding part

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyoshi Nakagawa 1-1-1, Kamiyake, Heiwa-cho, Nakajima-gun, Aichi Prefecture Toray Textile Co., Ltd. Headquarters Tokai Office (56) References JP-A-61-146835 (JP, A) JP-A-58-191237 (JP, A) JP-A-58-169530 (JP, A)

Claims (5)

(57) [Claims] 1. A false twisted composite yarn having a core-sheath structure comprising at least two kinds of thermoplastic synthetic fiber multifilaments A and B, wherein the false twisted composite yarn has a single-wound portion in the length direction of the yarn. forms alternately a triple winding unit, number of twists of the unit with single winding is in the range of 500T / M or 1500T / M, and the number of twists per 1cm of the unit with single winding is flat
Non-uniform with variation of average twist number ± 100T / M or more
Random-like pongee-like composite processed yarn characterized by being wound around . 2. A thermoplastic synthetic fiber multifilament A as a core yarn and a thermoplastic synthetic fiber multifilament B as a sheath yarn.
And the fineness of the sheath B in the longitudinal direction is different between the single wrapped portion and the triple wrapped portion, and the fineness of the triple wrapped portion is 3% or more thicker than the single wrapped portion of the sheath B. 2. The randomly processed composite yarn according to claim 1. 3. A method for producing a false twist composite yarn having a core-sheath structure comprising at least two kinds of thermoplastic synthetic fiber multifilaments A and B, wherein the yarn A has a birefringence Δn of 10
A polyester filament consisting of 0 × 10 ^{−3 to} 140 × 10 ⁻³ is used, and the birefringence Δn of the yarn B is 30 × 10 ^−3.
-3 to 70 × 10 ^-3 and Δn is 120 × 10 ^-3 to 1
A polyester filament in which a portion of 60 × 10 ⁻³ is mixed in the length direction is used, and the yarn A is periodically oscillated on the upstream side of the heating area in the false twisting step of the yarn A while the yarn B is vibrated periodically. And then the twisted yarn is false twisted.
Spindle false twist located downstream from the heating area in the construction process
False twisting processing using a device, and single winding in the length direction of the yarn
Part and the triple wound part are formed alternately, and the single wound part
The number of twists is between 500 T / M and 1500 T / M
And the number of twists per 1 cm of the single-wound portion is the average actual
Non-uniform winding with variation of twist number ± 100 T / M or more
A method for producing a random, pongee-like composite textured yarn, which comprises obtaining a tightly textured composite textured yarn. 4. A polyethylene terephthalate highly oriented undrawn yarn (POY) is used as the B yarn, and the birefringence Δn is 30.
× 10 ⁻³ to 70 × 10 ⁻³ and Δn are 120 × 10 ⁻³
The method for producing a pongee-like composite processed yarn according to claim 3 , wherein a filament yarn in which a portion of ~ 160 x ^10-3 is mixed in the length direction of the yarn is formed in a previous step or a separate step following the false twisting step. 5. The yarn B is polyethylene terephthalate high
Unoriented oriented yarn (POY) is stretched in natural stretching elongation (ND)
4. A yarn obtained by drawing in a yarn as described in claim 3.
Production method of the pongee-like composite processed yarn described above.