JPH0832982B2 - Cotton-like knitted fabric and method for producing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cotton-like knitted fabric and a method for producing the same.

More specifically, the present invention relates to a cotton-like knitted fabric having an excessive "smelling" feeling, a soft feeling, and a scrapy natural unevenness, and a method for producing the same.

[Prior Art] A sea-island type composite fiber multifilament yarn and another multifilament yarn are mixed and woven by air entanglement, and the resulting entangled and focused yarn is woven and knitted, and then the sea-island type composite fiber is deseaed. A knitted fabric and a method for producing the knitted fabric which give a "smelling" feeling and a soft texture are well known.

However, in the method using the interlaced nozzle for the mixed fiber processing, migration between the sea-island type composite fiber multifilament yarn and other multifilament yarns becomes extremely poor, and it is almost impossible for raw silk comrades to do the same.

This is because the denier of the monofilament filament yarn of the sea-island type composite fiber multifilament yarn that is being mixed and mixed is large, and the number of constituent fibers is small, so that the entanglement forming force is weak and the mixture fiber hardly occurs.

Furthermore, it becomes a yarn form in which focusing and opening are repeated intermittently in the yarn length direction. As a result, “knitting” occurs in knitted and woven products.
There are many problems in product development because the appearance becomes a fatal defect due to unevenness or strong "irritability" unevenness or dyeing difference.

On the other hand, in a method using a turbulent flow processing nozzle for fluid processing, since the purpose is to make the ultrafine fibers appear on the surface of the knitted fabric and to obtain the feel of the ultrafine fibers, a sheath is generally used. The sea-island type composite fiber multifilament yarn is used on the yarn side.

The single yarn denier of the sea-island type composite fiber multifilament yarn is as thick as 5 denier or more before the sea removal treatment, so that the number of loops and tarmi formed is extremely small and the entanglement is weak, so the stability is low and However, there was a problem that the loops and tarmi disappeared, and as a result, the "kore" became defective.

In the case where the sea-island type composite fiber multifilament yarn is used as the core yarn, since the single yarn denier is as thick as 5 denier or more, loops and tarmi are scarcely formed, and the stability is low and the tension of winding, etc. However, since it is difficult to form a loop due to the turbulence, the method using a fluid turbulent flow processing nozzle has not been implemented, and of course, has not been commercialized.

[Problems to be Solved by the Invention] An object of the present invention is to improve a "dullness" state in a mixed yarn using a sea-island type composite fiber multifilament yarn as a core yarn and another multifilament yarn as a sheath yarn, The purpose of the present invention is to provide a cotton-like knitted woven fabric having a swelling and tarmi to the ultrafine fibers, and having a feeling of "smelling" and softness, and a natural shading-like unevenness of density, and a manufacturing method thereof. To do.

[Means for Solving the Problems] The present invention has the following configuration in order to achieve the object.

That is, the present invention, the fineness of the single fiber filament is 0.
An ultrafine fiber yarn having a denier of 1 denier or less and a fiber yarn having a thicker denier than a single fiber filament of the ultrafine fiber yarn are entangled and bundled, the ultrafine fiber yarn is provided in a core portion, and the thick denier fiber yarn is provided in a sheath portion. A knitted woven fabric composed of entangled bundled yarns each having a yarn structure that is roughly distributed in a core / sheath shape, wherein a part of the ultrafine fibers constituting the core portion appears on the surface of the knitted woven fabric,
The cotton-like knitted fabric is characterized in that a part thereof is unevenly distributed and has a scraped appearance to have a natural unevenness.

Further, the method for producing the above cotton-like knitted fabric comprises a sea-island type composite fiber multifilament yarn A, and a multifilament yarn B in which the fineness of the single fiber filament is larger than the single fiber filament fineness after elution of the filament yarn A. Filament filament B from filament filament A
%, The entangled and concentrating yarn obtained by subjecting to fluid turbulence processing is woven and knitted, and then the sea component of the sea-island type composite fiber multifilament yarn A is desalted.

 Hereinafter, the present invention will be described in more detail.

The cotton-like knitted fabric of the present invention is composed of ultrafine fiber yarns having a fineness of a single fiber filament of 0.1 denier or less and fiber yarns having a fineness of single fiber filament greater than that of the ultrafine fiber yarn.

When the denier of the monofilament filament that constitutes the ultrafine fiber yarn is 0.1 denier or less, the bending rigidity of the fiber generally decreases in proportion to the fourth power of the yarn diameter, so the knitted fabric has a flexible bending feeling. It is easy to obtain, and it is especially remarkable in the case of a single yarn denier having a small one order smaller than 0.1 denier which cannot be obtained by ordinary spinning. Moreover, since the number of fibers of the ultrafine fiber yarn is extremely large, the contact area between the ultrafine fiber yarn and the hand or the skin is also large, so that the touch of the knitted fabric has a "moist" feel.

However, if 100% of ultrafine fiber yarn of 0.1 denier or less is used, it is too soft and cannot be used for knitted fabric. Therefore, in order to give a feeling of tension or waist, fiber yarn of thicker denier than the above ultrafine fiber is used. When used on the sheath side, it is possible to emphasize moderate softness and tension and waist.

In particular, the denier range for thick denier fiber threads is 0.4-2.1.
Denier is suitable, it has an appropriate softness and a "smelling" feeling, and the "soft" state with the ultrafine fiber yarn is also improved.

Next, the entangled and bundled filament yarn is composed of the entangled and bundled ultrafine fiber yarn in the core portion, the thick denier fiber yarn in the sheath portion, and the yarn structure unevenly distributed in the core / sheath shape. By using a thick denier fiber yarn for the sheath portion, the entangled bundle yarn becomes easy to bend, and the knitted fabric has a soft texture.

On the contrary, when a thick denier fiber yarn is used for the core, the bending resistance is high, and the knitted fabric has a feeling with a core.

The surface of the knitted fabric made of the above confounding and concentrating yarns is a loop,
Or it has slack, but the number is very small and almost swells.

In addition, the surface of the knitted fabric has a yarn structure in which a part of each of the fiber yarns of the core portion and the sheath portion alternately protrudes and has a shading-like shade difference in the yarn longitudinal direction.

This is because in a yarn structure unevenly distributed in the form of a core / sheath, the ratio of uneven distribution in the core of the ultrafine fiber yarn determines the state of scrapes that alternately come out. The larger the ratio is, the less the amount of the ultrafine fiber yarn in the core portion is exposed to the surface of the knitted fabric, and the natural difference in dark and light dyeing of conspicuousness is conspicuous. Preferably, the ratio is 50% or more, and generally a lower ratio gives a more natural feeling. It should be noted that the ultrafine fiber yarn is generally lightly dyed, and the thick denier fiber yarn looks like deep dyeing. In addition, when the ratio of the ultrafine fiber yarns unevenly distributed in the core portion is small, the "texture" feeling on the surface of the knitted fabric is increased.

FIG. 1 shows a cross-sectional view of an interlaced bundle yarn in a yarn obtained by disassembling the knitted fabric. (A) shows the case where the ratio of the ultrafine fiber yarn 1 unevenly distributed in the core part is large, and (b) shows the case where the ratio of the ultrafine fiber yarn 1 unevenly distributed in the core part is small.

 The thick denier fiber yarn 2 is unevenly distributed in the sheath portion.

 Next, the manufacturing method of the present invention will be described in detail.

A sea-island type composite fiber multifilament yarn A and a multifilament yarn B thicker than the multifilament yarn A are used.

The sea-island type composite fiber multifilament yarn A has a sea-island type structure spun from the same spinneret, and after the single fiber filaments are eluted, a plurality of island components corresponding to 0.1 denier or less and the island components It is composed of sea components that are surrounded by the sea and are eluted by chemical treatment. Therefore, the denier of the single fiber filament yarn is usually thicker than 5 denier.

As the island component constituting the sea-island type composite fiber, all polymeric substances capable of forming fibers can be used.

For example, polyamide, polyester and the like. Further, the sea component may be one having a solvent solubility different from that of the island component. As the combination of island component-sea component,
Nylon-6 or 66, polyethylene terephthalate,
Alternatively, nylon-6 or 66, polystyrene or the like can be applied.

Among them, polyester is suitable as the island component and polyester obtained by copolymerizing dimethyl 5-sodium sulfoisophthalate is suitable as the sea component.

Instead of the elution-type multifilament, a split-type composite yarn may be applied.

The multifilament yarn B thicker than the multifilament yarn A is a multifilament yarn of thermoplastic synthetic fiber such as polyamide or polyester, and the denier range of the single fiber filament is 0.4 to 2.1. As described above, when the thickness is smaller than 0.4 denier, the "entanglement" of the confounding focusing is bad, and when it is thicker than 2.1 denier, the formation of the confounding focusing is poor, which is not preferable.

This is because the denier of the monofilament filament yarn of the sea-island type composite fiber before elution is too thick, so that the range of denier to be combined is limited.

The multifilament yarn B is subjected to fluid turbulent flow processing while supplying 1% or more, preferably 1 to 10% in excess of the multifilament yarn A.

That is, the point is to positively supply the sea-island type composite fiber so as to be arranged in the core yarn.

Further, it is preferable that the filament yarn A has a shrinkage ratio difference of 1% or more than the filament yarn B.

Fluid disturbed machining is, for example, the "Taslan" type Hemajet T
-311 etc. may be used.

The entangled bundling yarn obtained by the fluid turbulence process is then knitted and woven.

The interlaced bundling yarn has very few loops or slack on the surface. In order to improve the weavability of the woven fabric, additional yarn, for example, about 100 to 1200 T / m may be applied, and there are almost no restrictions on the usage, structure and density of the warp and weft.

The knitted and woven fabric is then dyed, and the sea component of the sea-island type composite fiber multifilament yarn is eluted by the chemical treatment.

This is after the chemical treatment that makes it easier to selectively elute the sea component of the sea-island type composite fiber multifilament yarn,
By the elution treatment, fibers having an island component of 0.1 denier or less can be obtained, and a woven fabric using entangled and bundled filaments containing filament yarn of 0.1 denier or less, which cannot be obtained by one-shot spinning, can be produced.

FIG. 2 shows a process of fluid turbulence machining, which is a part of the present invention.

The sea-island type composite fiber multifilament (A) 1 is fed from the feed roller 3 and the multifilament yarn (B) 2 having a large fineness is fed from the feed roller 4 to the fluid turbulent flow processing nozzle 6 by means of the water applying device 5. The yarn (A) 1 is supplied while water is added thereto, and subjected to fluid turbulence processing. Then, it is manufactured by a process of pulling it out from the delivery roller 7 and winding it up with cheese by the winding roller 8.

[Example 1] 50-denier, 9-filament (single-fiber filament yarn denier 5.5d) polyester elution-type composite fiber multi-filament yarn (island component: polyester, sea component: 5-sodium) having a boiling water shrinkage ratio of 7.7% Copolymerization of dimethyl sulfoisophthalate, elution number: 70 filaments / filament, single fiber filament denier is 0.08 denier) 2 yarns are aligned and have a boiling water shrinkage of 5.7% 60
A denier, 144 filament polyester multifilament yarn was used to produce entangled and bundled yarns, which were then woven and dyed and finished to obtain a woven fabric. The manufacturing conditions are as follows.

Overfeed rate: Elution type composite fiber multi-filament yarn + 5% Polyester multi-filament yarn + 10% Delivery roller speed: 300m / min Nozzle type: Hema jet T-311 Fluid injection pressure: 7kg / cm ² The fabric was woven under the conditions and then dyed and finished to produce a woven fabric.

Vertical yarn: Elution type composite fiber Multifilament yarn / Polyester multifilament yarn Horizontal yarn: Same as above Weaving: 2/2 twill Density: Vertical −87 yarns / in Horizontal fabric −110 yarns / in The dyeing finishing conditions are as follows: The street.

Relax: 98 ℃ × 30 minutes Acid treatment: 3g / maleic acid 130 ℃ × 30 minutes Desalination treatment: NaOH 40g (Salt) / 98 ℃ × 55 minutes Dyeing process: Terasil Navy Blue S-L 3% owf, 130 ℃ × The woven fabric obtained for 40 minutes was a cotton-like knitted woven fabric having a “smelling” feeling and a soft texture and a natural “unevenness” feeling.

[Effects of the Invention] The present invention having the above-described structure has the following excellent operational effects. That is, in the woven fabric after the dyeing treatment, for example, the elution-type composite fiber multifilament yarn is unevenly distributed in the core portion in the yarn cross section (a).
And the yarn shape as shown in (b) in which the elution-type composite fiber multifilament yarn is unevenly distributed in the sheath portion becomes an alternating and entangled focusing structure yarn, and as a result, the woven fabric obtained by elution The texture has a soft "smelling" feeling. This is because the ultrafine fibers partially appear in the sheath part, or the ultrafine fibers are unevenly distributed in the core part, so that the easiness of bending of the woven fabric texture becomes soft, and a "smelling" feeling of the surface is added,
A cotton-like contact can be obtained.

Further, as a surface effect, the elution-type composite fiber multifilament yarn is repeatedly unevenly distributed in the core part or the sheath part to improve migration with the multifilament yarn, and a dyeing difference of 3 to 10 cm on the woven fabric. A surface effect that appears randomly at intervals and has a natural sense of unevenness can be obtained.

Further, in general, the ultrafine fibers unevenly distributed in the core portion become a light-colored scrap, while the thick denier fiber threads unevenly distributed in the sheath portion become dark-colored.

Next, a combination of yarn types is selected so that the boiling water shrinkage rate of the elution-type composite fiber multifilament yarn is 1% or more higher than that of the multifilament yarn, and further, in fluid processing, the overfeed rate of the elution-type composite fiber multifilament yarn By making the condition smaller than the multifilament yarn, the uneven distribution of the core / sheath becomes clear. Therefore, the ultrafine fibers after dyeing are almost unevenly distributed in the core part, and the light color of the ultrafine fibers is changed to the multifilament. It can also be covered by threads.

[Brief description of drawings]

FIG. 1 shows a cross-sectional view of an interlaced bundle yarn in a knitted fabric according to the present invention. (A) shows a case where a ratio of extra fine fiber yarns unevenly distributed in a core portion is large, and (b) shows an extra fine yarn. The figure shows the case where the ratio of uneven distribution of the fiber yarns in the core is small. FIG. 2 shows a process of fluid turbulence machining. 1: Sea-island type composite fiber multi-filament yarn A 2: multi-filament yarn B 3: feed roller 4: feed roller 5: water application device 6: fluid turbulence processing nozzle 7: delivery roller 8: take-up roller

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Claims (4)

[Claims] 1. An ultrafine fiber yarn having a fineness of a monofilament filament of 0.1 denier or less, and a fiber yarn having a denier thicker than the monofilament filament of the ultrafine fiber yarn are entangled and bundled, and the ultrafine fiber yarn is formed in a core portion. A knitted woven fabric comprising entangled bundle yarns in which the thick denier fiber yarns are distributed in a sheath portion in a generally core / sheath-like yarn structure, and the surface of the knitted fabric is an ultrafine fabric that constitutes the core portion. A cotton-like knitted fabric characterized in that a part of the fibers are exposed, and the parts are unevenly distributed to have a scraped appearance and have a natural unevenness. 2. The cotton-like knitted woven fabric according to claim 1, wherein the monofilament filament fineness of the thick denier fiber yarn is 0.4 to 2.1 denier. 3. A sea-island type composite fiber multifilament yarn A
And a multifilament yarn B whose monofilament filament fineness is larger than the single filament filament fineness after elution of the filament yarn A, while supplying the filament yarn B in excess of 1% or more than the filament yarn A. A method for producing a cotton-like knitted woven fabric, which comprises weaving and weaving an entangled bundle yarn obtained by subjecting to fluid turbulence processing, and then removing sea components of the sea-island type composite fiber multifilament yarn A. 4. The method for producing a cotton-like knitted woven fabric according to claim 4, wherein the filament yarn A has a shrinkage difference of 1% or more than the filament yarn B.