JP3253685B2 - Non-uniform composite textured 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 composite processed yarn capable of obtaining a dry knitted fabric by compositely processing at least two types of yarns having different dyeing properties, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, various attempts have been made to produce heather-like yarns by using interlacing using at least two types of yarns having different dyeing properties. For example, Japanese Patent Application Laid-Open No. 51-70342 discloses a composite having different colors or different shades of light, which has a bundled portion and a spread portion, and there is at least one entangled and bundled portion in one inch. We propose yarn for heather-like knitted fabric. Japanese Patent Application Laid-Open No. 61-40770 discloses a method having a difference in dyeability.
By combining two kinds of thermoplastic multifilament undrawn yarn,
When performing false twisting simultaneously with drawing, the two yarns were passed through a feed roller in a separated and independent state, and provided at a position where the two types of multifilaments between the feed roller and the heat fixing device were in an undrawn state. Using the yarn control device, the two multifilament undrawn yarns heading to the start point of false twisting are plied so that the entering angles are substantially equal, and the yarn is temporarily fixed at a temperature at which the multifilament does not fuse. It has been proposed to twist, then perform interlacing and then wind. JP-A-63-249728 discloses that, in a composite core-sheath false twisted yarn composed of at least two types of polyester filaments having different filament finenesses, a thick fineness filament group constituting a core portion is an ionic dye. Non-staining, filament fineness 6.5
１１11 denier, the fine filament group constituting the sheath is dyeable with an ionic dye, the filament fineness is 0.8 to 2/2 denier, and the fine filament group relative to the large fine filament group Fineness ratio of 0.7
１1.4 and between 4 and 2 between the two filament groups.
There is disclosed a technique in which there is a yarn length difference of 0% and entanglement is imparted to the entire processed yarn.

[0003]

However, each of the above-mentioned known examples aims at obtaining a uniform processed yarn in the length direction of the yarn, and manufactures a multi-stage yarn using interlacing. It was difficult. That is, simple confounding of different colors or JP-A-61-40770.
Japanese Patent Application Laid-Open No. 63-249728 discloses the provision of a plying control device for twisting a composite, or performing a composite false twisting with a specified fineness as in JP-A-63-249728. The aim was for a uniform processed yarn in the length direction of the yarn.

[0004] In order to solve the above-mentioned problems of the prior art, the present invention is to produce a composite processed yarn capable of exhibiting a dry-feel knitted fabric by generating an uneven thickness in the longitudinal direction of the yarn, and manufacturing the same. The aim is to provide a method.

[0005]

In order to achieve the above object, the heterogeneous composite yarn of the present invention is a composite yarn comprising at least two kinds of thermoplastic multifilaments having different dyeing properties. 90-230 composite yarns /
m, entanglement non-uniformity in the length direction of the yarn, and a difference in yarn length 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 kinds of thermoplastic multifilaments having different dyeing properties.
At least two types of multi-filament semi-drawn yarns are used as raw yarns, ligated, first subjected to a pre-entanglement treatment at a feed rate of + 5% or less, and then heat-set at a temperature at which the multi-filaments are not fused. While twisting and false-twisting simultaneously with stretching under the condition of a tension ratio (T) of 0.9 or less, non-entangled portions and non-entangled portions are stretched unevenly, and thereafter, a post-entanglement process is performed. [However, in the above, the tension ratio (T) refers to 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 the false twist processing at the same time as the drawing is a triaxial circumscribed disk type or a belt nip type, and the (twist speed of the disk or the belt / the yarn speed) Preferably, the ratio is 2 or more.

[0007]

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

Further, according to the manufacturing method of the present invention, the first confounding
By performing the simultaneous draw-twisting process and the subsequent entanglement process at a low tension ratio, the composite processed yarn having the dry feeling can be reasonably and efficiently produced.

The false twist twister used for the false twisting simultaneously with the stretching is a triaxial circumscribed disk type or a belt nip type, and the ratio of (the peripheral speed of the disk or the belt / the speed of the yarn) is 2 or more. According to the preferred configuration of the method of the present invention, simultaneous false twisting at a low tension ratio can be efficiently performed.

[0010]

The present invention will be described more specifically with reference to the following examples. FIG. 1 shows an example of an apparatus for carrying out the present invention. In FIG. 1, reference numerals 1 and 2 denote a supply yarn (semi-drawn yarn package), 3 denotes a feed roller, 4 denotes an air (tip) entanglement nozzle, 5 denotes a feed roller, 6 denotes a heat fixing device in a false twist zone, 7 Is a triaxial circumscribing twister, 8 is a feed roller, 9 is an air (rear) entangled 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 dyeing properties, for example, a partially oriented yarn (POY) of polyethylene terephthalate and a partially oriented yarn of a 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 obtained by copolymerizing a 5-sodium sulfoisophthalic acid component with about 2.4 mol% can be used. When such a combination of POYs is used, multicolor dyeing can be performed and a high-grade knitted fabric can be obtained. Of course, other half-drawn yarns having different dyeing properties may be used. For example, partially oriented yarns (POY) of polyethylene terephthalate having different draw ratios can be used.

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

Next, the multifilament is heat-set at a temperature at which it does not fuse. The preferred heat setting temperature for false twisting is 120 to 220C, more preferably 180 to 200C for polyester. The tension ratio during false twisting is 0.9
The friction false twist is performed below. The tension ratio (T) is defined as the tension in the twisting zone as (T ₁ ) and the tension in the untwisting zone as (T ₂ ).
Means the ratio of T ₂ / T ₁ . More specifically,
The tension between the feed roller 5 and the triaxial circumscribed twister 7 (twisting zone) is (T ₁ ), and the tension between the triaxial circumscribed twister 7 and the feed roller 8 (untwisting zone) is (T ₁ ). ₂ ), the ratio of T ₂ / T ₁ is set to 0.9 or less. This has an effect of leaving a part of the pre-entanglement and an untwisted portion in the false twisting step. In addition, in normal false twisting, it is in the range of 1.0 to 1.2.

When the false twist twister used for false twisting is of the triaxial circumscribed disk type or the belt nip type, the ratio of (the peripheral speed of the disk or belt / the speed of the yarn) is preferably 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 rotation speed of the twister is increased. In a false twisting process using a normal triaxial circumscribed disk type or a belt nip type false twist twister, the value is around 1.9.

By adopting such false twist processing conditions, the entangled portion and the non-entangled portion are stretched unevenly, and thereafter, the entanglement process is performed so that the number of entanglements is 90 to 230 / m. The tension ratio is set to 0.9 or less, preferably 0.6 or less, in the friction stretching false twist after the first entanglement. Thereby, an unstretched part and a stretched part are generated at random. In addition, since the pre-entangled portion also remains 1/3 or more under preferable conditions, by performing post-entanglement, it is possible to efficiently produce a non-uniform composite textured yarn having non-uniformity in stretching and non-uniformity in confounding. it can. In addition, 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 can be obtained. A processed yarn is obtained.

Further, the method of the present invention for performing the confounding processing at a feed rate of + 5% or less is disclosed in Japanese Patent Publication No. 61-2066.
As disclosed in Japanese Patent Publication No. 2 (1994), this is performed by pre-entanglement treatment and then drawing false twisting, and one of two or more filament yarns is used as a core yarn and the other yarn is partially used. While the filaments are mixed and interlaced with the core portion, the core yarn surface is formed into a portion bundled in a continuous alternating reversal in a substantially bundled state and a portion formed by individual filaments or a continuous alternating reversal in a random phase. In the present invention, by setting the yarn length difference between the core and the sheath to be 2 to 10%, the yarn is not formed in this form but becomes almost aligned, so that a later 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 twist device (circumscribed type) having a rotating friction disk or a belt nip method of sandwiching between belts can be used. This is characterized in that the false twisting device sets the untwisting tension low when the false twisted yarn is untwisted, and the yarn is not rubbed with a very high tension, so that it is difficult for the false twist or the like to be formed. If the false twist device is changed to the false twist spindle method, the untwisting tension will increase,
Nep and fuzz are increased and the purpose cannot be achieved.

A specific embodiment will be described below. Example 1 125 denier-3 wound at a spinning speed of 3000 m / min
Polyethylene terephthalate obtained by copolymerizing a 6-filament polyethylene terephthalate semi-drawn yarn (POY) (A) and a 150-denier-36-filament 5-sodium sulfoisophthalic acid component wound at a spinning speed of 2500 m / min in an amount of about 2.4 mol%. (B) was entangled at the same time as the pre-entanglement, and then entangled and wound, using the apparatus shown in FIG.

The main conditions are as follows. (1) Length of the heat fixing device 6: 2.0 m (2) Temperature of the heat fixing device 6: 200 ° C. (3) False twisting device 7: A triaxial circumscribing friction false twisting device is used. Eight pieces of urethane rubber are installed (peripheral speed of disk / speed of thread)
= 2.2 (4) Pre-entangled feed rate: + 2% (5) Post-entangled feed rate: + 2% (6) Number of false twists: 2363 T / m (7) Processing speed: 300 m / min (8) Stretch simultaneous false twist Zone tension ratio: T ₂ / T ₁ = 0.
6 The obtained composite yarn has entanglement of 154 yarns / m and non-uniformity of the stretched portion and the entangled portion in the length direction of the yarn, and the difference in yarn length between the two filaments is 4%. There was a non-uniform composite textured yarn. Furthermore, it was excellent in bulkiness and bulkiness. Also, the diameter is partially different in the length direction of the yarn,
Even when a load was applied during the knitting process, the diameter remained partially different in the length direction of the yarn. (A normal false twisted yarn becomes uniform in thickness by the above-mentioned constant load.) The obtained yarn is knitted by circular knitting and dyed and finished. The dough was obtained. Moreover, the touch of the obtained knitted fabric was hemp-like and had a swelling feeling, and the texture of natural fibers was good.

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

[0021]

[Table 1]

As is apparent from Table 1, the composite textured yarn is 90
It was confirmed that when the number of entanglements in the range of ２３０230 / m and the yarn length difference between the two filaments were 1 to 10%, a good dry feeling was exhibited.

As described above, according to the present embodiment, at least two types of multifilament semi-drawn yarns having different dyeing properties are used, ligated and firstly entangled at a feed rate of + 5% or less. After the heat treatment, the yarn is heat-set at a temperature at which the yarn does not fuse, and simultaneously stretched and stretched under the condition of a tension ratio of 0.9 or less so that the entangled portion and the non-entangled portion are unevenly stretched. Perform processing. The composite textured yarn obtained thereby has entanglement in the range of 90 to 230 yarns / m and non-uniformity of stretching and entanglement in the length direction of the yarn. In the range of 1 to 10%.

[0024]

As described above, according to the present invention, the composite textured yarn has entanglement in the range of 90 to 230 yarns / m, and has non-uniformity of stretching and entanglement in the length direction of the yarn, The yarn length difference between the at least two filaments is 1 to 10%
By using such a textured yarn, a composite textured yarn capable of expressing a knitted fabric having a dry feeling can be obtained.

Further, according to the manufacturing method of the present invention, the pre-entanglement
By performing the simultaneous draw-twisting process and the subsequent entanglement process at a low tension ratio, the composite processed yarn having the dry feeling can be reasonably and efficiently produced.

[Brief description of the drawings]

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

[Explanation of symbols]

 1; semi-drawn yarn package (A) 2; semi-drawn yarn package (B) 3; feed roller 4; entanglement nozzle 5; feed roller 6; heat setting device 7; friction false twisting device 8; Entangling nozzle 10; take-up roller 11; winding device

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI D02J 1/22 D02J 1/22 M (56) References JP-A-4-73231 (JP, A) JP-A-63-12732 JP, A) JP-A-4-185735 (JP, A) JP-A-59-116435 (JP, A) JP-A-54-156836 (JP, A) JP-A-55-112324 (JP, A) JP-A-63-249728 (JP, A) JP-A-55-137229 (JP, A) JP-A-55-137234 (JP, A) JP-B-61-20662 (JP, B1) (58) Fields investigated (Int .Cl. ⁷ , DB name) D02J 1/00-13/00 D02G 1/00-3/48

Claims (3)

(57) [Claims] 1. A composite textured yarn comprising at least two types of thermoplastic multifilaments having different dyeing properties,
The composite processed yarn has entanglement in the range of 90 to 230 yarns / m, has fineness and non-uniformity of entanglement in the length direction of the yarn, and the yarn length difference between the at least two types of filaments is 1
Non-uniform composite textured yarn characterized by being 10% to 10%. 2. A method for producing a composite textured yarn comprising at least two types of thermoplastic multifilaments having different dyeing properties, wherein at least two types of multifilament semi-drawn yarns are used as raw yarns, First, the yarn is 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 multifilament is not fused, is simultaneously stretched and false-twisted at a tension ratio (T) of 0.9 or less. A method for producing a non-uniform composite textured yarn, comprising processing the non-entangled portion and the non-entangled portion to stretch unevenly, and then performing a post-entanglement process.
[However, in the above, the tension ratio (T) refers to 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 simultaneously with stretching is a triaxial circumscribed disk type or a belt nip type, and a ratio of (circumferential speed of disk or belt / speed of yarn) is 2 or more. The method for producing a non-uniform composite textured yarn according to claim 2.