JP3018467B2 - Composite false twist yarn - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a composite false twist yarn suitable for spun-like woven fabrics, especially knitted worsted fabrics, and more particularly, alternately twisted outer yarns around a core yarn. The present invention relates to a composite false twisted yarn which is wound in a shape and has improved feel such as excellent resilience and surface feel.

(Prior art) Japanese Patent Application Laid-Open No.
As described in Japanese Patent No. 47644 and JP-A-49-72443, a filament having a small elongation obtained by false-twisting two kinds of multifilaments having different elongations in a aligned state is a core. There is known a composite false twisted yarn in which a filament having a high elongation constitutes an outer layer portion of the yarn and is wound around the core portion.

In Japanese Patent Publication No. Sho 61-52254, the composite false twisted yarn similar to that of Japanese Patent Application Laid-Open No. 49-47644 improves the feeling by increasing the filament fineness of the multifilament constituting the core to at least 3 den, thereby improving the feeling. It has been proposed to. However, even such composite false twisted yarns are not sufficiently satisfactory in swelling, tightness, elasticity, and surface feeling required for a spun-like woven or knitted fabric.

Further, Japanese Patent Publication No. 62-35493 proposes to obtain a soft feeling by setting the filament fineness of a wound yarn as an outer layer portion to 1.8 den or less. However, simply reducing the fineness of the filament that constitutes the outer layer not only enhances the feeling of sliminess but also gives a soft feel at first, but the crimp set easily occurs during the use process and the swelling decreases. There was a problem.

(Problems to be Solved by the Invention) The present invention improves the drawbacks of the conventional composite false twist yarn,
It is an object of the present invention to provide a composite false twisted yarn having soft swelling, stiffness, elasticity, natural surface feeling and dry touch when formed into a woven or knitted fabric.

(Means for Solving the Problems) The present invention has the following configuration to achieve the above object. That is, the present invention relates to a composite false twisted yarn in which the polyester multifilament A mainly forms the core of the yarn, and the polyester multifilament B is wound around the yarn alternately in a twisted manner to mainly form the outer layer portion. Average filament fineness of 3.0 ~ 6.0
den, the multifilament B is composed of at least two types of filaments having different filament fineness in the range of 0.7 to 6.0 den, the total fineness of the multifilament A; the total fineness of the multifilament B; , The total fineness of the filament having a filament fineness of less than 3.0 den in the multifilament B; DB
L, filament fineness in multifilament B
A composite false twisted yarn characterized by DB / DA = 0.65 to 1.5 and DBH / DBL = 0.2 to 1.5 when the total fineness of filaments of 3.0 den or more is DBH.

(Action) In the composite false twisted yarn of the present invention, the average filament fineness of the polyester multifilament A mainly forming the core portion needs to be in the range of 3.0 to 6.0 den. 3.0
If it is less than den, when it is made into a woven or knitted fabric, it lacks tension, waist and elasticity. On the other hand, when the average filament fineness exceeds 6.0 den, the woven or knitted fabric becomes coarse and hard, and the swelling characteristic of the composite false twisted yarn is also lost.

Therefore, in the present invention, the average filament fineness of the multifilament A forming the core portion needs to be 3.0 to 6.0 den, but sufficient tension, waist and elasticity cannot be obtained at all. That is, in the present invention, the multifilament B forming the outer layer portion is constituted by two or more kinds of filaments having different filament fineness in the range of 0.7 to 6.0 den, and among them, a soft bulge is produced by the fine fineness filament of less than 3.0 den. , 3.0 dens or more of large fineness filaments suppresses crimping of fine fineness filaments,
In addition to the ability to maintain swelling in the process of use, it is combined with a 3.0-6.0 den thick filament forming the core to make the swelling and elasticity more effective without losing soft swelling. It is possible.

Further, the filaments of different fineness in the multifilament B have different physical properties such as modulus, so that the form of the false twist crimp of each filament is different.
Therefore, when the surface of the woven or knitted fabric is formed with uniform filament fineness, only a strong feeling of slimy feeling can be obtained with a monotonous surface feeling, whereas when the surface is formed with filaments of different fineness as in the present invention. In this method, a spun-like woven or knitted fabric rich in surface changes can be obtained.

Further, it is considered that the presence of the above-mentioned different crimp forms makes the interfilament space formed by each filament a complicated form, thereby improving the elasticity of the woven or knitted fabric.

Furthermore, the presence of a filament having a fineness of 3.0 den or more in the multifilament B makes it possible to add a dry surface touch to the woven or knitted fabric.

The filament fineness described above in the filament B
If the fineness filaments of less than 3.0 den are less than 0.7 den, it becomes too soft, and only a woven or knitted fabric is obtained, and there is a problem that swelling is reduced in the use process. In the case of a filament having a filament fineness of 3.0 den or more, the filament fineness is 6.
Beyond 0den, the stretch and elasticity of the woven or knitted fabric is improved, but not only soft swelling is lost, but also the surface touch becomes coarse and hard.

From the same viewpoint as above, that is, from the viewpoint of matching the seemingly contradictory characteristics of the woven or knitted fabric such as soft bulge and tightness, elasticity, and dry surface touch, the multi-layered yarn mainly forming the outer layer portion in the composite false twisted yarn is used. The composition ratio of the filament B and the multifilament A that mainly forms the core, and the composition ratio of the thick and fine filaments in the multifilament B are important. The composition ratio can be appropriately selected according to the required texture of the woven or knitted fabric, but in the present invention, the following is necessary. That is, the total fineness of the multifilament A; DA, the total fineness of the multifilament B; DB, the total fineness of the filament having a filament fineness of less than 3.0 den in the multifilament B; Total fineness; DB / DA = 0.65 ~
1.5, DBH / DBL = 0.2-1.5. That is, if DB / DA is less than 0.65 or DBH / DBL exceeds 1.5, the woven or knitted fabric has a coarse and hard texture, while DB / DA is 1.5 or less.
If DBH / DBL is less than 0.2, sufficient tension cannot be obtained, and the feeling of twitching becomes too strong. DBH / DBL
Is less than 0.2, the surface touch becomes more slimy and deviates from the present invention.

 Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view of a composite false twist yarn of the present invention. Multifilament, a ₁ is the multi-filament A filament, B multifilament forming the outer layer, b ₁ is the multi-filament large fineness filament fineness is more than 3.0den of B forming the A is the core unit in FIG. filaments, b ₂ is a small fineness filament of less than 3.0Den. The multifilament B is wound around the multifilament A in an alternately twisted shape with the reversing parts E and F being upside down,
Multifilament B is constituted by fine denier filaments b ₂ and are commingled or entangled with a large fineness filament b _1, also filaments b ₁ and the filament b ₂ of part multifilament A enters in the core portion It is mixed with.

FIG. 2 is a schematic side view of an apparatus for producing a composite false twist yarn of the present invention. This figure shows an example of the manufacturing apparatus, and is not limited to this.
A ₁ and B ₁ are polyester undrawn yarns, and A ₁ undrawn yarns are
Compared to the undrawn yarn of B _1, a low elongation undrawn yarn. The undrawn yarns A ₁ and B ₁ are combined by a convergence guide 2 via respective guides 1 and 1 ′, and supplied to an air jet nozzle 4 for mixing and entanglement via a feed roller 3. Next, between the first delivery roller 5 and the second delivery roller 8, simultaneous stretching and false twist is performed by the heater 6 and the false twist spindle 7. Next, the package C driven by the take-up roller 9
The composite false twist yarn of the present invention is obtained.

Here, the total fineness of the undrawn yarn A ₁ and B _1, the filament fineness is selected as to be within the scope of the following post each draw texturing.

That is, When was the _{DB 1 / DA 1 = 0.65~1.5,} DBH 1 / DBL 1 = 0.2~1.5
And

 Hereinafter, the manufacturing method will be described in more detail.

Since the undrawn yarns A ₁ and B ₁ are aligned and simultaneously false-twisted, the multi-filament B ₁ having a high elongation has a lower false twisting tension than the multi-filament A _{1 having} a low elongation. _The number of twists changes according to the tension of B ₁ around ₁ and the wire is wrapped and untwisted by the false twist spindle 7 by the same number of twists. In the portion having a small number of twists, overtwisting is performed and the twist in the untwisting direction remains, resulting in a composite false twisted yarn of the present invention having a form as shown in FIG.

Note undrawn yarn A ₁ and B ₁ is aging of the undrawn yarn, and elongation from workability during false twisting is keep suppressed to a maximum 350% is desirable.

In addition, if the difference in elongation between the undrawn yarns A ₁ and B ₁ is large, the winding due to the remaining twist tends to be strong and the feel of the woven or knitted fabric tends to be hard, and if the difference in elongation is small, the winding becomes loose. Since the feeling tends to be flexible, it can be adjusted as needed.

Undrawn yarn A ₁ it is obtained by conventional spinning. Also, different fineness undrawn yarn B ₁ represents, but for simultaneously spinning using a spinneret with two hole diameter is reasonable, two undrawn yarn separately spun, if in a later step It is also possible to thread.

Here, the undrawn yarns A ₁ and B ₁ are subjected to the blending / entanglement treatment by the air jet nozzle 4, which is performed by using the fine filament and the fine filament of the multifilament B ₁ or the filament of the multifilament A ₁ . Filament and mixed fiber
It is preferably carried out in order to cause entanglement, increase swelling, and prevent filaments having a uniform filament fineness from sticking to the surface. As another method, it can be performed between the second delivery roller 8 and the take-up roller 9.

The false twist condition is appropriately selected according to the undrawn yarn to be used, the difference in elongation, and the required texture of the woven or knitted fabric.

(Examples) Example 1 A spinneret having 24 holes with the same hole diameter was used as a spinneret, and a polyethylene terephthalate chip was melt-spun by a usual method and wound up with a winder at a take-up speed of 3600 m / min. Thus undrawn yarn A with 96den / 24fil, 80% elongation
₁ was obtained.

Furthermore, a spinneret having two types of hole diameters was used as a spinneret having two types of hole diameters, and a polyethylene terephthalate chip was melt-spun in a usual manner to obtain 2600 m / m.
It was wound on a winder at a take-off speed of one minute. 96 consisting of a filament fineness of 4.8 den, 8 filaments and a filament fineness of 2.4 den, 24 filaments
den / 32fil, to obtain an undrawn yarn B ₁ elongation 132%.

These two types of undrawn yarns A ₁ and B ₁ were subjected to false twisting using an apparatus shown in FIG. The processing conditions are as follows: overfeed rate to air injection nozzle 1.0%, air pressure of air injection nozzle 3.0kg / cm ²・
G, draw ratio 1.28, heater temperature 200 ° C, number of false twists 2500T /
m and the winding speed were 150 m / min. The composite false twisted yarn thus obtained has a yarn form as shown in the schematic diagram of FIG. 1, and mainly has a multifilament A having a filament fineness of 3.1 den and a total fineness of 75 den as a core portion, and a filament fineness of 3.8 den around it. Filament b ₁ and filament fineness 1.
Multifilament B total fineness 75den which the filament b ₂ is configured with combined filament of 9den was composite false twisted yarn total fineness 150den became primarily outer portion wound around the alternately twisted yarn-like. Then use this composite false twist yarn
The fabric was a 2/2 twill texture. The woven fabric thus obtained has a soft bulge, a firmness and elasticity comparable to those of worsted woven fabrics, and is rich in surface changes, yet it has a soft but dry surface touch. Was.

Comparative Example 1 A spinneret having a hole diameter of 48 and the same hole diameter was used as a spinneret, and the same polyethylene terephthalate chip as in the example was melt-spun using a conventional method, and was wound up with a winder at a take-up speed of 2600 m / min. Thus 96den / 40fil, elongation 125
Yield% of an undrawn yarn B _'1.

The undrawn yarn B _'1 and undrawn yarn A ₁ of Example the same apparatus used in Example was false twisted under the same processing conditions. The false twisted yarn thus obtained is mainly composed of a multifilament with a filament fineness of 3.1 den and a total fineness of 75 den,
Around it, filament fineness 1.9den, total fineness 75
It was a composite false twisted yarn with a total fineness of 150 den, in which the den multifilaments were wound in an alternately twisted shape and mainly became the outer layer. Next, this composite false twist yarn was used as a woven fabric having the same structure as that of the example. The woven fabric thus obtained not only lacked swelling, but also lacked firmness and resilience, and had a slimy feeling peculiar to processed yarn woven fabric, and was insufficient as a spun-like woven fabric.

(Effect of the Invention) The composite false twist yarn of the present invention has a specific denier and filament fineness of a multifilament forming a core portion and an outer layer portion in the composite false twist yarn, and further includes a multifilament serving as an outer layer portion. Is composed of two or more types of filaments with different filament deniers, so woven and knitted fabrics using it have a soft swelling, yet are excellent in dry surface touch, tension, elasticity, and rich in surface changes, Ideal as a spun-like woven yarn.

[Brief description of the drawings]

FIG. 1 is a schematic view of the composite false twist yarn of the present invention, and FIG. 2 is a front view of an apparatus for producing the composite false twist yarn of the present invention. Multifilament a ₁ ...... The multifilament A multifilament b ₁ ...... multifilament large fineness filament b ₂ ...... 〃 fineness filaments of B to form filaments B ...... outer layer forming the A ...... core A ₁ ... polyester undrawn yarn (low elongation) B ₁ ... 〃 (high elongation) C ... composite false twisted yarn package 1,1 '... guide 2 ... bundle guide 3 ... feed roller 4 ... … Air injection nozzle 5… first delivery roller 6… heater 7… false twist spindle 8… second delivery roller 9… take-up roller.

Claims (1)

(57) [Claims] 1. A composite false-twisted yarn in which a polyester multifilament A mainly forms a core portion of a yarn, and a polyester multifilament B is wound around the yarn in an alternately twisted shape to mainly form an outer layer portion. The average filament fineness is in the range of 3.0 to 6.0 den, and the multifilament B has a filament fineness of 0.7.
It is composed of at least two kinds of filaments different in the range of ~ 6.0 den, the total fineness of the multifilament A; the total fineness of the DA and the multifilament B; Fineness; DBL, total fineness of filaments having a filament fineness of 3,0 den or more in multifilament B; DB / DA = 0.65 to 1.
5. A composite false twist yarn characterized in that DBH / DBL = 0.2 to 1.5.