JPH0633333A - Non-uniform conjugate textured yarn and its production - Google Patents

Abstract

PURPOSE:To obtain conjugate textured yarn having dry touch by using two or more kinds of semi-drawn yarns and subjecting the yarns to pre-entanglement, simultaneous drawing and false-twisting treatment at low tension ratio and post-entanglement. CONSTITUTION:At least two kinds of semi-drawn multifilament yarns 1, 2 having different dyeabilities are doubled and subjected to a pre-entanglement 4 at a feed ratio of <=+15% and a simultaneous drawing and false-twisting treatment 7 under a tension ratio of <=0.9 while thermally setting 6 the yarn at a temperature not to cause the fusion of the yarn. The entangled parts and non-entangled parts are non-uniformly drawn by this process. The drawn product is subjected to a post-entanglement 9 to obtain the objective conjugate textured yarn having 90-230 entanglements per 1m and drawing and entanglement non-uniformity in the direction of the yarn. The yarn length difference between the above two kinds of filaments is in the range of 1-10%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite textured yarn which is capable of producing a knitted fabric having a dry feeling by complexly processing at least two kinds of yarns having different dyeing properties and a method for producing the same.

[0002]

2. Description of the Related Art Heretofore, various attempts have been made to produce a yarn-like filament using interlacing (interlacing) using at least two kinds of yarns having different dyeability. For example, in Japanese Unexamined Patent Publication No. 51-70342, there are a plurality of compounded portions having different colors or different shades and an opening portion, and there is at least one portion which is entangled and converged within 1 inch. Hefty yarn for knitting fabrics is proposed. Further, in JP-A-61-40770, there is a difference in dyeability 2
The thermoplastic multifilament unstretched yarn of the species is combined,
During false twisting simultaneously with drawing, the two yarns were passed through a feed roller in a separated and independent state, and the two types of multifilaments between the feed roller and the heat-setting device were provided at a position in an undrawn state. With the compounding yarn restricting device, the two kinds of multifilament undrawn yarns toward the false twist starting point are combined so that the yarn insertion angles thereof are substantially equal to each other, and the temporary fixing is performed while heat fixing at a temperature at which the multifilaments do not fuse. It has been proposed to twist and then interlace and then wind. Further, in Japanese Patent Application Laid-Open No. 63-249728, in a composite core-sheath false twist textured yarn composed of at least two kinds of polyester filament groups having different filament fineness, the large fineness filament group constituting the core portion is an ionic dye. It is non-staining and has a filament fineness of 6.5.
To 11 denier, the fine filament group constituting the sheath is dyeable with an ionic dye, and the filament fineness is 0.8 to 2/2 denier, and the fine filament group to the large fine filament group is Has a fineness ratio of 0.7
~ 1.4 and between 4 and 2 between both filament groups
A technique is disclosed in which there is a 0% difference in yarn length and entanglement is imparted to the entire processed yarn.

[0003]

However, in all of the above-mentioned known examples, the purpose is to obtain a textured yarn that is uniform in the length direction of the yarn, and multi-stage shaped yarns are manufactured using interlacing (entanglement). It was difficult. That is, a simple entanglement of different colors or JP-A-61-40770
The compound false-twisting device of Japanese Patent Laid-Open No. 63-249728 is used, or the compound false-twisting is performed by defining the fineness thereof as in Japanese Patent Laid-Open No. 63-249728. This was aimed at a processed yarn that was uniform in the length direction of the yarn.

In order to solve the above-mentioned problems of the prior art, the present invention produces a textured yarn having a dry feeling by producing a non-uniform thickness in the longitudinal direction of the yarn, and a composite textured yarn and its production. The purpose is to provide a method.

[0005]

In order to achieve the above object, the heterogeneous composite textured yarn of the present invention is a composite textured yarn composed of at least two kinds of thermoplastic multifilaments having different dyeability. 90-230 pieces of composite processed yarn /
In addition to having the entanglement in the range of m, the fineness and the entanglement are non-uniform in the length direction of the yarn, and the yarn length difference between the at least two types of filaments is 1 to 10%.

The method for producing a heterogeneous composite textured yarn of the present invention is a method for producing a composite textured yarn comprising at least two types of thermoplastic multifilaments having different dyeability.
At least two kinds of multifilament semi-stretched yarns are used as the raw yarns, which are combined and first preentangled at a feed rate of + 5% or less, and then heat set at a temperature at which the multifilaments do not fuse. While the tension ratio (T) is 0.9 or less, a false twisting process is performed at the same time as the drawing, and the entangled portion and the non-entangled portion are non-uniformly stretched, and then the post-entanglement treatment is performed. [However, the tension ratio (T) in the above means a ratio of T ₂ / T ₁ when the tension in the twisting zone is (T ₁ ) and the tension in the untwisting zone is (T ₂ ). In the production method of the present invention, the false twist twister used for false twisting at the same time as stretching is a triaxial circumscribed disc type or a belt nip type, and the (disc or belt peripheral velocity / thread velocity) It is preferable that the ratio is 2 or more.

[0007]

According to the above-mentioned constitution of the present invention, the composite processed yarn has the entanglement in the range of 90 to 230 pieces / m and has the non-uniformity of the fineness and the entanglement in the length direction of the yarn, By using a textured yarn in which the difference in yarn length between the two types of filaments is 1 to 10%, it is possible to obtain a composite textured yarn capable of expressing a knitted fabric having a dry feel.

According to the manufacturing method of the present invention, the pre-entanglement-
By performing the simultaneous drawing simultaneous false twisting process with a low tension ratio and the post-entanglement process, the composite processed yarn having the dry feeling can be reasonably and efficiently manufactured.

Further, the false twist twister used for the false twisting simultaneously with the drawing is of the triaxial circumscribed disc type or the belt nip type, and the ratio of (the peripheral velocity of the disc or the belt / the velocity of the yarn) is 2 or more. According to the preferable configuration of the method of the present invention, it is possible to efficiently perform the simultaneous drawing false twisting process with a low tension ratio.

[0010]

EXAMPLES The present invention will be described in more detail with reference to the following examples. FIG. 1 is an example of an apparatus for carrying out the present invention. In FIG. 1, reference numerals 1 and 2 designate a supply yarn (semi-drawn yarn package), 3 a feed roller, 4 an air (pre) entanglement nozzle, 5 a feed roller, 6 a heat setting device in a false twist zone, 7 Is a triaxial circumscribed type twister, 8 is a feed roller, 9 is an air (rear) entanglement nozzle, 10 is a take-up roller, and 11 is a winding device.

In the present invention, as at least two kinds of thermoplastic multifilaments 1 and 2 having different dyeability, for example, a partially oriented yarn (POY) of polyethylene terephthalate and a partially oriented polyethylene terephthalate copolymer containing a copolymer are used. It can be used in combination with a yarn (POY). As the polyethylene terephthalate copolymer, for example, a basic dyeable type,
Polyethylene terephthalate copolymerized with about 2.4 mol% of 5-sodium sulfoisophthalic acid component can be used. By using such a combination of POYs, it is possible to perform multicolor dyeing and to make a high-quality knitted fabric. Of course, other semi-drawn yarns having different dyeability may be used. For example, polyethylene terephthalate partially oriented yarns (POY) having different draw ratios can also be used.

Next, it is preferable that the pre-entanglement is conducted at a feed rate of + 5% or less so that the number of intertwining is 10 to 50 / m. The entanglement nozzle used for entanglement is preferably
The jet of compressed air is disposed substantially perpendicular to the passage of the yarn, and the air pressure is preferably about 3 kg / cm ² gauge pressure.

Next, heat fixing is performed at a temperature at which the multifilaments are not fused. The preferred heat setting temperature for false twisting is 120 to 220 ° C, and more preferably 180 to 200 ° C in the case of polyester. Tension ratio during false twisting is 0.9
Friction false twist is performed below. This tension ratio (T) means that the tension in the twisting zone is (T ₁ ) and the tension in the untwisting zone is (T ₂ ).
Is the ratio of T ₂ / T ₁ . More specifically,
The tension between the feed roller 5 and the triaxial circumscribed type twister 7 (twisting zone) is (T ₁ ), and the tension between the triaxial circumscribed type twister 7 and the feed roller 8 (untwisting zone) is (T ₁ ). when a _2), the ratio of T ₂ / T ₁ is to 0.9 or less. This has a function of leaving a part of the preentanglement and the untwisted portion in the false twisting process. In the case of ordinary false twisting, the range is 1.0 to 1.2.

When the false twist twister used for false twisting is of the triaxial circumscribed disc type or the belt nip type, it is preferable that the ratio of (circumferential velocity of disc or belt / speed of yarn) is 2 or more. . Especially 2.1
The range of -2.3 is preferable. This is to increase the yarn feeding effect. For this purpose, the rotational speed of the twister is increased. In the case of false twisting using a normal triaxial circumscribed disk type or belt nip type false twist twister, it is around 1.9.

By adopting such false twisting processing conditions, the entangled portion and the non-entangled portion are non-uniformly stretched, and then the entanglement treatment is performed to obtain the entanglement number of 90 to 230 pieces / m. The above-mentioned friction stretch false twist after the pre-entanglement makes the tension ratio 0.9 or less, preferably 0.6 or less. As a result, unstretched portions and stretched portions are randomly generated. In addition, since the first entangled portion also remains 1/3 or more under the preferable conditions, the post-entanglement can efficiently produce a heterogeneous composite processed yarn having non-uniform drawing and non-uniform entanglement. it can. Further, the degree of stretching of the entangled portion and the non-entangled portion is different, and a composite processed yarn that is non-uniform in the longitudinal direction of the yarn is obtained. By further confounding the yarn, the heterogeneous composite having a dry feeling is obtained. A processed yarn is obtained.

Further, the method of performing the confounding treatment at a feed rate of + 5% or less according to the present invention is disclosed in Japanese Patent Publication No. S61-2066.
This is disclosed in Japanese Patent Publication No. 2), in which one of two or more types of filament yarn is used as a core yarn and the other yarn is a part of the filament yarn after being subjected to entanglement treatment in advance and then drawing false twist. While the filaments are mixed and intermingled with the core portion, the filaments have a form in which they are formed on the surface of the core yarn in a substantially focused state in a continuous alternating inversion pattern and in individual filaments or in a random phase in a continuous alternating inversion pattern. In the present invention, when the difference in yarn length of the core-sheath is set to 2 to 10%, this form does not occur and the yarns are almost aligned, so that the subsequent entanglement treatment is required.

In the manufacturing method of the present invention, a friction false twisting device is used as the false twisting device. For example, a triaxial false twisting device having a rotating friction disc (outside contact type) or a belt nip system of sandwiching with a belt can be used. This is characterized in that when the false twisting yarn is untwisted in the false twisting device, the untwisting tension is set low and the yarn is not rubbed with too high tension, so that neps, fluffs and the like are less likely to occur. If the false twisting device is a false twisting spindle system, the untwisting tension will be high,
Nep and fluff are often generated, and the purpose cannot be achieved.

Specific examples will be described below. Example 1 125 denier-3 wound at a spinning speed of 3000 m / min
6-filament polyethylene terephthalate semi-drawn yarn (POY) (A) and 150 denier-36 filaments of 5-sodium sulfoisophthalic acid component wound at a spinning speed of 2500 m / min. Using the apparatus shown in FIG. 1, (B) was stretched and false twisted at the same time as the pre-entanglement, then entangled and wound.

The main conditions are as follows. (1) Length of heat setting device 6: 2.0 m (2) Temperature of heat setting device 6: 200 ° C. (3) False twisting device 7: A triaxial circumscribed friction false twisting device is used. Equipped with 8 urethane rubber type (disk peripheral speed / thread speed)
= 2.2 (4) Pre-entanglement feed rate: + 2% (5) Post-entanglement feed rate: + 2% (6) False twist number: 2363 T / m (7) Processing speed: 300 m / min (8) Simultaneous drawing false twist zone tension ratio _{of: T 2 / T 1 = 0} .
6 The obtained composite processed yarn has an entanglement of 154 pieces / m and has non-uniformity in the stretched portion and the entangled portion in the length direction of the yarn, and the yarn length difference between the two types of filaments is 4%. It was a non-uniform composite processed yarn. Furthermore, it was excellent in bulkiness and bulkiness. In addition, the diameter is partially different in the length direction of the thread,
Even when the load applied during the knitting process was applied, the diameter remained partially different in the length direction of the yarn. (Ordinary false twisted yarn has a uniform thickness under the above-mentioned constant load.) The obtained yarn is knitted in circular knitting and dyed and finished, resulting in a dry feeling and a good feel. I got the dough. The touch of the obtained knitted fabric was hemp-like and swelled, and the feel of the natural fiber was good.

Example 2 Semi-drawn yarns (A) and (B) having various elongations were prepared, and Example 1 was prepared.
Similarly to the above, the confounding conditions were variously changed using the apparatus shown in FIG. 1, and the circular knitted fabric texture was measured based on the relationship between the number of confounding and the yarn length difference. The results are shown in Table 1.

[0021]

[Table 1]

As is clear from Table 1, the composite textured yarn has 90
It was confirmed that when the number of entanglement in the range of up to 230 / m and the yarn length difference between the two types of filaments was 1 to 10%, a good dry feeling was exhibited.

As described above, according to this embodiment, at least two kinds of multifilament semi-stretched yarns having different dyeing properties are used, and these yarns are combined, and first, preentanglement is performed at a feed rate of + 5% or less. Treated, then heat-set at a temperature at which the yarns do not fuse, and simultaneously draw and false-twist at a tension ratio of 0.9 or less to draw the entangled portion and the non-entangled portion unevenly, and then post-entangle Perform processing. The composite processed yarn thus obtained has entanglement in the range of 90 to 230 pieces / m, and also has nonuniformity of stretching and entanglement in the length direction of the yarn, and the yarn length difference between the two types of filaments. A composite processed yarn having a range of 1 to 10% is obtained.

[0024]

As described above, according to the present invention, the composite processed yarn has the entanglement in the range of 90 to 230 pieces / m and the nonuniformity of the stretching and the entanglement in the length direction of the yarn. The yarn length difference between the at least two types of filaments is 1 to 10%
By using the textured yarn that is, it is possible to obtain a composite textured yarn that can express a knitted fabric having a dry feeling.

According to the manufacturing method of the present invention, the pre-entanglement-
By performing the simultaneous drawing simultaneous false twisting process with a low tension ratio and the post-entanglement process, the composite processed yarn having the dry feeling can be reasonably and efficiently manufactured.

[Brief description of drawings]

FIG. 1 is a composite drawing false twisting process diagram showing an example of the present invention.

[Explanation of Codes] 1; Semi-drawn yarn package (A) 2; Semi-drawn yarn package (B) 3; Feed roller 4; Entangling nozzle 5; Feed roller 6; Heat setting device 7; Friction false twisting device 8; Feed roller 9; Entangling nozzle 10; Take-up roller 11; Winding device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location D02J 1/22 M

Claims (3)

[Claims] 1. A composite textured yarn comprising at least two types of thermoplastic multifilaments having different dyeability, comprising:
The composite processed yarn has a entanglement in the range of 90 to 230 pieces / m and has a non-uniformity of fineness and entanglement in the lengthwise direction of the yarn, and the yarn length difference between the at least two types of filaments is 1
Non-uniform composite processed yarn, characterized by being 10%. 2. A method for producing a composite textured yarn comprising at least two types of thermoplastic multifilaments having different dyeability, wherein at least two types of multifilament semi-drawn yarns are used as raw yarns, which are combined. The yarn is first subjected to a pre-entanglement treatment at a feed rate of + 5% or less, and then, while being heat-set at a temperature at which the multifilaments do not fuse, while being stretched and false twisted at a tension ratio (T) of 0.9 or less. A method for producing a heterogeneous composite processed yarn, which comprises subjecting the entangled portion and the non-entangled portion to uneven drawing and then performing post-entanglement treatment.
[However, in the above, the tension ratio (T) means T ₂ / T ₁ when the tension in the twisting zone is (T ₁ ) and the tension in the untwisting zone is (T ₂ ). ] 3. A false twist twister used for false twisting at the same time as drawing is of a triaxial circumscribed disc type or a belt nip type, and has a ratio of (circumferential velocity of disc or belt / speed of yarn) of 2 or more. The method for producing a heterogeneous composite textured yarn according to claim 2.