JPH07189065A - Nonuniform composite textured yarn and its production - Google Patents

Abstract

PURPOSE:To obtain soft nonuniform composite textured yarn of a core-sheath structure having stiffness, a worsted touch feeling and a natural feeling of unevenness. CONSTITUTION:This method for producing composite textured yarn of a core- sheath structure is to introduce polyester filament yarn (POY) having 20 to 80X10<-3>(DELTAn) into a draw texturing region between feed rollers 7 and 7' and feed rollers 9 and 9', form thick and thin yarn (A) comprising deep dyed thick parts (X) having 30 to 70X10<-3>(DELTAn) and lightly dyed thin parts (Y) having 120 to 160X10<-3>(DELTAn) mixed in the longitudinal direction at >=20 to <=50% ratio [X/(X+Y)]X100 thereof, on the other hand, feed polyester-based yarn (POY) (B) having >=0.8 to <=1.2 size ratio and 20-80X10<-3>(DELTAn) from the feed rollers 9 and 9' thereto and apply partial interlacements of 20-60, preferably at least 30 interlacements/m through an air interlacer 15 to both the yarns (A) and (B) and then carry out the false twist texturing with an external contact type frictional false twister 12 at an overfeeding ratio within the range of 0 to 4-18%. The resultant yarn has >=15 to >=30% difference in yarn length and nonuniform thickness unevenness or dyeing speck in the longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-uniform composite textured yarn having a natural uneven feeling and a method for producing the same.

[0002]

2. Description of the Related Art It has been conventionally known to produce a yarn having a spun yarn-like appearance and bulkiness by using a false twisting method using a thermoplastic synthetic fiber multifilament yarn.

A typical example thereof is Japanese Patent Publication No. 60-70.
50 and Japanese Patent Publication No. 60-11130. The false twist composite yarns obtained by these manufacturing methods all have yarns having different degrees of elongation of semi-drawn yarns,
It is an attempt to impart a spun yarn-like appearance by applying simultaneous false drawing and winding a sheath yarn around the core yarn in an alternate twisted yarn form. The false-twisted composite yarn thus obtained is characterized in that it has a relatively large bulkiness and can be dyed in a dark color as a spun yarn-like appearance. Further, Japanese Patent Publication No. 57-38696 discloses that a semi-stretched yarn of polyester is pre-stretched and then this yarn is simultaneously false-twisted with other yarns to produce various yarn-shaped composite yarns. There is.

The composite processed yarns shown here are drawn by semi-drawing polyester under predetermined drawing conditions and immediately false-twisting with other yarns at the same time. By this, a yarn-like composite yarn is obtained. As described above, the conventional Japanese Patent Publication No. 60-7050 and Japanese Patent Publication No. 60-
The invention of Japanese Patent No. 11130 is to obtain a yarn-like composite yarn due to a difference in dyeing due to a difference in physical properties of both yarns by false-twisting a semi-drawn yarn at the same time.

[0005]

However, in the inventions of Japanese Patent Publication No. 60-7050 and Japanese Patent Publication No. 11-11130 of the prior art, woven fabrics using these yarns are used because the semi-stretching and the false twisting are simultaneously performed. The knitted fabric is soft, but there is a problem that it is not stiff and only uniform processed yarn can be obtained.

In order to solve the above-mentioned problems of the prior art, the present invention provides a non-uniform composite processed yarn which is soft and has a feeling of combing and has a natural feeling of unevenness, and a method for producing the same. With the goal.

[0007]

In order to achieve the above object, the heterogeneous composite processed yarn of the present invention has a core-sheath structure composed of at least two types of thermoplastic synthetic fiber multifilament yarn A component yarn and B component yarn. In the false twist composite yarn, the A component yarn occupying the core part and the B component yarn occupying the sheath part are partially entangled, and the yarn length difference between the A component yarn and the B component yarn is 15
% Or more and 30% or less, and has uneven unevenness in the longitudinal direction of the yarn, and the A component yarn has a thick dyed portion (X) and a light dyed thin portion (Y) mixed in the length direction of the yarn. Shiso ratio X /
It is characterized in that (X + Y) × 100 is 20% or more and 50% or less.

In the above structure, the core portion and the sheath portion are partially entangled, and the number of entanglement is preferably 20 to 60 pcs / m. A more preferable number of confounding is 30 to 50 /
m.

Further, in the above construction, the fineness ratio of the fibers of the core portion and the fibers of the sheath portion is preferably 0.8 or more and 1.2 or less in terms of core / sheath. Further, in the above configuration, it is preferable that the unevenness in the longitudinal direction is unevenness in thickness or unevenness in dyeing.

Next, in the first production method of the present invention, the following A component yarn occupying the core portion and the following B component yarn occupying the sheath portion are aligned and supplied to the false twisting region and false twisted. A method for producing a composite yarn, which is characterized by imparting at least 30 entanglements / m and then performing false twisting in the range of an overfeed rate of 0 to -18%. A component yarn: A portion having a birefringence Δn of 30 to 70 × 10 ⁻³ (X) and a portion of Δn of 120 to 160 × 10 ⁻³ (Y) are mixed in the length direction of the yarn, and the ratio X / (X + Y). ) X 100 is 20
% To 50% polyester-based filamentant yarn. Component B yarn: A polyester-based filamentant yarn having a birefringence Δn of 20 to 80 × 10 ⁻³ .

Next, the second manufacturing method of the present invention is based on double bending.
Folding rate Δn is 20-80 × 10^-3Thermoplastic synthetic fiber
Thifilaments are continuously drawn, and Δn is 30 to 70 ×.
10 ^-3(X) and Δn is 120 to 160 × 10
^-3(Y) are mixed in the length direction of the yarn, and the ratio X / (X +
Y) x100 is firamme with 20% or more and 50% or less
And the birefringence Δn is 20 to 80 × 10.
^-3B filament, which is a polyester-based filamentation yarn
At least 30 entanglements / m are provided by aligning with the split yarn
Then, temporarily set the overfeed rate to 0-18%.
Characterized by twisting.

In the above-mentioned structure, preferably, the birefringence Δn of the component A is 20 to 60 × 10 ⁻³ and 120 to 17 are included.
By setting it to be 0 × 10 ⁻³ , a yarn having a natural unevenness can be realized. At this time, the basic dyeable type 5-
Polyethylene terephthalate copolymerized with about 2.4 mol% of sodium sulfoisophthalic acid component may be used.

In addition, the difference in yarn length between the A component yarn and the B component yarn is 15
% To 30% is preferable, but it is particularly preferably 25% to 30% in order to express a carded tone more.

[0014]

According to the structure of the present invention, the A component yarn occupying the core portion and the B component yarn occupying the sheath portion are partially entangled with each other, and a difference in yarn length between the A component yarn and the B component yarn is caused. 15% or more 30
% Or less and has uneven unevenness in the longitudinal direction of the yarn, and the A component yarn has a thick dyed portion (X) and a light dyed thin portion (Y) mixed in the yarn lengthwise direction X / (X + Y)
When x100 is 20% or more and 50% or less, it is possible to realize a non-uniform composite processed yarn that is soft and has a feeling of combing, and has a natural uneven feeling.

According to the preferred construction of the present invention in which the core portion and the sheath portion are partially entangled and the number of entanglement is 20 to 60 pieces / m, the yarn is excellent in integrity and is soft. It has a waist and a carded-like texture.
A more preferable number of entanglements is 30 to 50 / m.

Further, in the above, according to the preferable constitution of the present invention in which the fineness ratio of the fibers of the core portion and the fibers of the sheath portion is 0.8 or more and 1.2 or less in terms of core / sheath, it is further soft and elastic. It has a combed-like texture and has a natural uneven feeling.

Further, according to the preferable constitution of the present invention in which the unevenness in the longitudinal direction is unevenness in thickness or unevenness in dyeing, a more excellent natural unevenness can be exhibited.

Next, according to the structure of the first manufacturing method of the present invention, by the pre-entanglement-false-twisting method, it is soft and has a chewy, combed, and natural unevenness. The uniform composite processed yarn can be efficiently and reasonably manufactured.

Next, according to the second manufacturing method of the present invention, the stretch-pre-entanglement-false twist processing method provides a soft, elastic, combed-like texture and a natural unevenness. It is possible to efficiently and reasonably manufacture the heterogeneous composite processed yarn.

[0020]

EXAMPLES The present invention will be described in more detail with reference to the following examples. FIG. 1 is a schematic external view showing a yarn form of a heterogeneous composite processed yarn according to an embodiment of the present invention. In FIG. 1, 1
Indicates an opening portion, 2 indicates a core yarn portion, 3 indicates a sheath yarn portion, and 4 indicates an entangled portion. The core yarn portion 2 has a substantial main component occupied by the A component yarn, and the sheath yarn portion 3 has a substantial main component occupied by the B component yarn. Further, the A component yarn occupying the core yarn portion 2 and the B component yarn occupying the sheath yarn portion 3 are partially and intermittently entangled, and the preferable entanglement number is 20 to 60 pcs / m. Furthermore, the difference in yarn length between the A component yarn occupying the core yarn portion 2 and the B component yarn occupying the sheath yarn portion 3 is 15% or more and 30% or less. In addition, it has unevenness in the longitudinal direction of the yarn and occupies the core yarn portion.
The component threads are deep dyed and thick (X) and lightly dyed and thin (Y)
Are mixed in the length direction of the yarn and the ratio X / (X + Y) × 10
0 is 20% or more and 50% or less.

Next, FIG. 2 is a process diagram of a drawing-pre-entanglement-false-twisting method showing an embodiment of the second manufacturing method of the present invention. Pull out the A component yarn from the semi-drawn yarn (POY) package and feed it with the feed rollers 7, 7 '.
Stretches between the rollers 9 and 9 '. Reference numeral 8 is a heating device for hot drawing, and 5 is a drawing processing area. Between the heating device 8 and the feed rollers 9, 9 ', the B component yarn drawn from the semi-drawn yarn (POY) package
Combine with the component yarn. Next, using the air entanglement device 15, the A component yarn and the B component yarn are entangled. The number of entanglements is at least 30 / m. Next, the feed rollers 10,10 '
Between the feed roller and the feed roller 13, 13 'using the heat fixing device 11 and the friction false twisting device 12 with an overfeed rate of 0 to -18.
Perform false twisting in the range of%. 6 is a false twist area.
The obtained composite false twisted yarn is wound by the winding device 14. Here, as the A component yarn, the birefringence Δn is 20 to 80 × 10 ^−3.
Using the thermoplastic synthetic fiber multifilament of No. 30, the part where Δn is 30 to 70 × 10 ⁻³ (X) and Δn is 120 to 16
^{0x10 -3} (Y) is mixed in the length direction of the thread, and the ratio X
/ (X + Y) × 100 is continuously stretched so as to be 20% or more and 50% or less. Then, use the A component yarn as the core yarn,
The birefringence Δn is aligned with the B component yarn, which is a polyester-based filamentant yarn composed of 20 to 80 × 10 ^−3, to impart an entanglement of at least 30 / m, and then the overfeed rate is in the range of 0 to −18%. False twisting with. Next in FIG.
FIG. 4 is a process diagram of an example of a method for producing a false twist composite yarn by preparing the A component yarn in a separate step in advance, aligning the B component yarn, and supplying it to the false twisting region. here,
As the A component yarn, the birefringence Δn is 30 to 70 × 10.
^-3 (X) and Δn is 120 to 160 × 10 ^-3 (Y)
Are mixed in the length direction of the yarn, and the ratio X / (X + Y) × 1
A polyester-based filamentant yarn having 00 of 20% or more and 50% or less is used, and a birefringence Δ
A polyester-based filamentant yarn having n of 20 to 80 × 10 ⁻³ is used. And at least 30 / m
Entanglement (preferably 30 to 50 / m) is applied, and then false twisting is performed in the range of overfeed rate of 0% to -18%.

Specific examples will be described below. (Example 1) 1 wound at a spinning speed of 3000 m / min
25 denier 24 filament polyethylene terephthalate semi-drawn yarn (component A yarn) and spinning speed 3000 m / m
A polyethylene terephthalate semi-stretched yarn (POY) (component B yarn) of 80 denier 36 filaments wound up with in was subjected to pre-entanglement and stretch false twisting simultaneously with stretching using the apparatus shown in FIG. The main conditions are as follows. (1) Draw ratio between feed rollers 7 and 7'and feed rollers 9 and 9 ': 1.2 to 1.5 times (2) Temperature of heating device 8 for hot drawing: 80 to 120
℃ (3) Length of heat fixing device 11: 2 m (4) Temperature of heat fixing device 11: 200 ° C. (5) False twisting device 7: 3-axis external friction false twisting device Equipped with 8 urethane rubber systems, D / Y ratio (circumferential speed of yarn / yarn speed):
2.0-2.5 (6) Pre-entanglement feed rate: 3% (7) Overfeed rate in false twisting area: -12% (8) Processing speed (winding speed): 200 m / min Table 1 shows the results of measuring the relationship between the stretching ratio, the feeling, and the natural feeling while variously stretching conditions were changed.

[0023]

[Table 1]

Sample No. 1 was prepared as the A component system at the level shown in Table 1, and after being aligned with the B component system, pre-entangled and subjected to a false false twisting process, resulting in a combed and natural feeling. 3 and 4 were good. The birefringence Δn of the A component yarn at that time is 30
Up to 70 × 10 ^-3 (X) and Δn is 120 to 160 ×
10 ^-3 (Y) are mixed in the length direction of the yarn, and the ratio X /
(X + Y) × 100 was good from 20% to 50%. The number of entanglements was 40 / m on average, which was excellent in convergence.

(Example 2) The drawing of Example 1 was carried out in a separate step, and the component A yarn (with a birefringence Δn of 30 to 70 × 10 ^-3 was previously prepared).
The portion (X) and the portion where Δn is 120 to 160 × 10 ⁻³ (Y) are mixed in the length direction of the yarn, and the ratio X / (X + Y)
Polyester filaments having a 100% of 20% to 50% were prepared, and pre-entanglement and false twisting were performed with the component B yarn using the apparatus shown in FIG. The raw yarn used is the A component yarn:
85 denier-36 filament yarn (mainly drawn separately beforehand), B component yarn: 85 denier 36 filament yarn (3
000 m / min spun POY). The main manufacturing conditions were the same as in Example 1.

The obtained composite textured yarn is a worsted composite textured yarn in which the A component yarn and the B component yarn have a entanglement of 40 threads / m and a yarn length difference of 26%, and have a feeling of unevenness in the longitudinal direction of the yarn. there were. Further, when a yarn having a core-sheath yarn length of 15% to 30% was prepared and a woven or knitted product was prepared, it was possible to prepare a carded-like cloth having a natural uneven feeling.

[0027]

As described above, according to the present invention, the A component yarn occupying the core portion and the B component yarn occupying the sheath portion are partially entangled, and further, the A component yarn and the B component yarn are Thread length difference is 1
It is 5% or more and 30% or less, has uneven unevenness in the longitudinal direction of the yarn, and the A component yarn has a thick dyed portion (X) and a light dyed thin portion (Y) in the length direction of the yarn. Mixed ratio X /
When (X + Y) × 100 is 20% or more and 50% or less, it is possible to realize a non-uniform composite textured yarn that is soft and has a feeling of combing and a natural feeling of unevenness.

Further, according to the first production method of the present invention, by the pre-entanglement-false-twisting processing method, a heterogeneous composite having a soft, chewy, combed-like texture and a natural uneven feeling. Processed yarn can be manufactured efficiently and rationally.

According to the second production method of the present invention, the stretch-pre-entanglement-false twist processing method is used to provide a non-uniform texture which is soft and has a chewy, combed, and natural unevenness. The composite processed yarn can be efficiently and reasonably manufactured.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a thread form according to an embodiment of the present invention.

FIG. 2 is a drawing series composite processing diagram of an example of the present invention.

FIG. 3 is a combined machining process diagram of another embodiment of the present invention.

[Explanation of symbols]

 1: Opening part 2: Core yarn part 3: Sheath yarn part 4: Entanglement part 5: Stretching process area 6: False twisting process area 7, 7 ': Feed roller 8: Heating device 9, 9': Feed roller 10, 10 ': Feed roller 11: Heat setting device 12: Friction false twisting device 13, 13': Feed roller 14: Winding device 15: Air entanglement device A: Semi-drawn yarn (POY) package B: Half-drawn Thread (POY) package

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Nakagawa 1-1-1, Kamimiyake, Heiwacho, Nakajima-gun, Aichi Prefecture Toray Textile Co., Ltd.

Claims (6)

[Claims] 1. A false twist composite yarn having a core-sheath structure composed of at least two types of thermoplastic synthetic fiber multifilament yarns A component yarn and B component yarn, wherein the A component yarn and the sheath portion occupy the core portion. The component B yarn is partially entangled with each other, and the difference in the yarn length between the component A yarn and the component B yarn is 15% or more and 30% or less, and there is unevenness in the longitudinal direction of the yarn, and the component A component The yarn is characterized in that a thick portion (X) with deep dyeing and a thin portion (Y) with light dyeing are mixed in the length direction of the yarn, and the ratio X / (X + Y) × 100 is 20% or more and 50% or less. Non-uniform composite processed yarn. 2. The heterogeneous composite processed yarn according to claim 1, wherein the core part and the sheath part are partially entangled, and the number of entanglements is 20 to 60 pcs / m. 3. The fineness ratio of the core fiber and the sheath fiber is
The heterogeneous composite processed yarn according to claim 1, having a core / sheath of 0.8 or more and 1.2 or less. 4. The non-uniform composite processed yarn according to claim 1, wherein the non-uniform unevenness in the longitudinal direction is thickness unevenness or dyeing unevenness. 5. A method for producing a false twist composite yarn by aligning the following component A yarns occupying the core portion and the following component B yarns occupying the sheath portion and supplying them to the false twisting region, wherein Three
0 / m entanglement, then overfeed rate 0
A method for producing a heterogeneous composite processed yarn, which comprises performing false twisting in the range of -18%. A component yarn: A portion having a birefringence Δn of 30 to 70 × 10 ⁻³ (X) and a portion of Δn of 120 to 160 × 10 ⁻³ (Y) are mixed in the length direction of the yarn, and the ratio X / (X + Y). ) X 100 is 20
% To 50% polyester-based filamentant yarn. Component B yarn: A polyester-based filamentant yarn having a birefringence Δn of 20 to 80 × 10 ⁻³ . 6. A thermoplastic synthetic fiber multifilament having a birefringence Δn of 20 to 80 × 10 ⁻³ is continuously drawn,
The part where Δn is 30 to 70 × 10 ⁻³ (X) and Δn is 120
˜160 × 10 ⁻³ (Y) mixed in the length direction of the yarn, and the ratio X / (X + Y) × 100 of 20% or more and 50% or less is used as the core yarn, and the birefringence Δn is used. Is 2
At least 30 pieces / m when aligned with the B component yarn, which is a polyester-based filamentant yarn composed of 0 to 80 × 10 ^-3
The entanglement of, then overfeed rate 0-18
A method for producing a heterogeneous composite processed yarn, which comprises performing false twisting in the range of%.