JP3119066B2 - Mixed fiber composite yarn, method for producing the same, and knitted fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed fiber composite yarn having a smooth touch, a method for producing the same, and a knitted fabric, and more particularly, to a feeling different from the sharpness of the conventional strong twist (smoothness). The present invention relates to a mixed fiber composite yarn which is excellent in drape property and mild luster, and is suitable for a knitted fabric having water absorbency, a method for producing the same, and a knitted fabric.

[0002]

2. Description of the Related Art Conventionally, polyester multifilament yarns are widely used for twisting and kneading alkali yarns for the purpose of obtaining a crispness and drapability of a knitted fabric. It is used as an element technology. In particular, additional twisting and alkali weight reduction are important points as elemental technologies for woven fabrics using polyester multifilament yarns, which are called “new synthetic fibers” made in pursuit of the unique texture of synthetic fibers.

[0003] The sharpness is generally imparted by a twisting technique.
In yarn processing, a method has been used which utilizes a technique of fusing between single filaments by high-temperature false twisting. Although the sharpness due to the twisting is related to the weave structure, generally, the number of twists is increased, and the strong twisting region is more excellent. On the other hand, by increasing the number of twists, a crispness and drapability can be obtained, but the luster of the yarn tends to decrease. Glossiness can be improved by making the fiber cross section triangular instead of circular, but it also decreases with an increase in the number of twists, and in the strongly twisted area the texture becomes dry rather than a sharp feeling. In addition, the additional twisting cost is greatly increased, which is not preferable. If the number of twists is small, there is a problem that the desired sharpness and drape cannot be obtained. As for the crispness due to the use of the fusion technique, the degree of freedom between the single filaments is lost due to the fusion, and the yarn becomes coarse and hard.

Further, knitted fabrics made of synthetic fibers in recent years are:
Although a novelty different from the conventional one is achieved when a woven or knitted fabric is viewed or touched, it has a drawback that when it is worn as a garment, its moisture absorbency and water absorbency are significantly inferior to those of natural fibers.

Various studies have been made to improve the hygroscopicity and water absorption of synthetic fibers, but there have been practical problems when compared with natural fibers.

In the case of a polyester multifilament yarn, water absorption can be imparted to a knitted fabric by devising its knitting structure, but for the water absorption of a woven fabric, a capillary technique using an aggregate of multifilaments according to the cross-sectional shape is used. There are ways to use and improve. However, especially when woven into a multifilament yarn as a higher-order processing means for imparting a new texture as described above,
There is a problem such as not being able to exhibit the water absorption effect, or the alkali absorption is essential for the water absorption effect, and it is necessary to obtain water absorption in a field where additional twisting is required, or water absorption is required in a field where alkali reduction is not required There were problems with obtaining water absorption in the application.

On the other hand, in Japanese Patent Application Laid-Open No. 4-316624, a specially shaped filament yarn having a modified section modulus of 2.0 or more and having a false twisted crimp is used as a core yarn, and a false twisted crimped yarn thinner than the core yarn. Has been proposed as a special bulked yarn having a sheath yarn. The special modified cross-section filament yarn used here has a modified cross-section modulus of 2.0 or more, that is, a long leaf length. Because there is a twist, the leaf (convex part) is easily deformed when twisting is applied,
The round cross-section yarn meshed with the concave portion was taken into the leaves and closed the inter-fiber voids, so that the effect of the deformed cross-section was not only a rough and undesirable feeling but also poor water absorption. .

[0008] In addition, the monofilament yarn of irregular cross section is thick,
In addition, since the deformed section modulus is as high as 2.0 or more, the filament yarn has poor flexibility and poor drapability.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and can obtain drapability and dryness by twisting, and is different from the sharpness of the conventional hard feeling by strong twisting. It is an object of the present invention to provide a mixed fiber composite yarn which can be provided to a knitted fabric having a feeling, further excellent drapability, mild gloss, and water absorption, a method for producing the same, and a knitted fabric.

[0010]

To achieve the above object, the present invention comprises the following arrangement.

That is, in a polyester multifilament yarn formed by randomly dispersing and blending two or more types of single filaments having different cross-sectional shapes, at least one type of single filament has a cross-sectional shape having no concave portion. And other monofilaments have recesses
And a cross section of a single filament having a cross section having the concave portion.
A concave portion formed between a convex portion and a convex portion adjacent to the convex portion
When at least one kind of a single filament having a cross-sectional shape having no cross-section and having no concave portion and at least one kind of a single filament having a cross-sectional shape having the concave portion are in contact with each other, A mixed fiber composite yarn having a cross-sectional shape in which a void is formed between cross sections of a single filament.

Further, two or more kinds of single filaments having different cross-sectional shapes obtained by melt spinning of a polyester polymer.
At least one monofilament of the bets are made sectional shape having no recess, the other single filaments have a recess, single filament cross-sectional shape having a recess
Formed between the convex portion of the cross section of the
It said before taking off polyester multifilament yarn consisting of single filaments sectional shape recess there is
Landing of two or more types of single filaments with different cross-sectional shapes
The present invention is a method for producing a mixed fiber composite yarn, comprising heating and stretching a polyester undrawn yarn or a pre-oriented yarn obtained by dispersing, bundling, and taking up the mixed fibers in a stable state.
Furthermore, two or more types of single filament capsules having different cross-sectional shapes obtained by melt spinning of a polyester polymer.
Chino consists sectional shape not having at least one single filament recess, have a single filament recesses otherwise, the cross-sectional of the single filament cross-sectional shape having a recess
Formed between the convex part of the surface and the convex part adjacent to the convex part
The two before taking off polyester multifilament yarn consisting of single filaments sectional shape recess is present
Single filaments with different cross-sectional shapes
A mixed fiber composite yarn is characterized in that the mixed fiber is dispersed in a state , bundled, and taken up at a speed of 4500 m / min or more.

Further, a polyester multifilament yarn composed of two or more types of single filaments having different cross-sectional shapes dispersed and mixed in a random state ,
At least one kind of single filament has a cross-sectional shape without a concave portion, and the other single filaments have a concave portion.
And a cross section of a single filament having a cross section having the concave portion.
A concave portion formed between a convex portion and a convex portion adjacent to the convex portion
When at least one kind of a single filament having a cross-sectional shape having no cross-section and having no concave portion and at least one kind of a single filament having a cross-sectional shape having the concave portion are in contact with each other, It is a cross-sectional shape that forms a gap between single filament cross sections,
Further, the twist coefficient α in the following equation is 2400 or more and 2200
0 is a knitted fabric characterized by comprising using the combined filament composite yarn is Tsuiyo in the range.

T = α · D ^{−1/2 where} T: number of twists [T / M] α: twist coefficient D: fineness of yarn [denier] Hereinafter, the present invention will be described in detail.

First, the mixed fiber composite yarn of the present invention will be described. The multifilament yarn of the present invention is characterized by a plurality of cross-sectional shapes of the multifilament yarn and its composite state, and it is possible to obtain a drape property and a dry feel by twisting the number of twists is smaller than that of the conventional strong twisting region. It is possible to reduce the number of twists compared to a multi-filament yarn composed of filament yarns with a single cross-sectional shape, has excellent drapability, and can make use of the luster of the original yarn in the concave portion, and has multiple cross-sections. The effect of the shape is to obtain a mild elegant luster. Furthermore, the woven fabric using the mixed fiber composite yarn of the present invention can exhibit a water absorbing effect by the structure of the cross-sectional shape of the mixed fiber composite yarn and the void structure between multifilaments generated by the mixed fiber state. When the multifilament yarn is twisted, the change in the void structure is small, the water absorption effect is maintained, and a smooth feeling without stickiness is obtained even in the water retention state by water absorption.

The mixed fiber composite yarn of the present invention is a multifilament yarn obtained by compounding filament yarns having different cross-sectional shapes. There are two or more types of cross-sectional shapes, of which at least one type of single filament is made of a filament yarn having a cross-sectional shape without a concave portion, and the other single filaments have a single-filament cross-sectional shape having at least one concave portion. This is very important.

FIG. 1 is a schematic sectional view showing an example of the mixed fiber composite yarn of the present invention. FIG. 1 is an example of a filament made of a filament having a circular (circular) cross section and a six-leaf cross section having six concave portions.

In the mixed fiber composite yarn of the present invention, the mixed fiber composite yarn is twisted due to the presence of the projections (projections formed between the recesses) having the cross-sectional shape having the recesses. Then, the surface irregularities different from the surface irregularities resulting from the twisting structure by the twisting produce a smooth feel and feel as the hand feeling, and the slimy feeling of the cross-section filament yarn without one concave part The harmony of a new feeling.

2 to 11 are explanatory diagrams for explaining the cross-sectional shape of the fiber.

More specifically, referring to the drawings, the cross-sectional shape without a concave portion according to the present invention basically means a cross-sectional shape without a plurality of contacts when a tangent line tangent to the cross-sectional contour is drawn in the same cross-section. However, the original yarn does not have a concave portion (the cross-sectional shape does not have a plurality of contact points), and also includes a cross-sectional shape that is partially concave due to contact with an adjacent yarn during the twisting process Say.

Specific examples of the cross-sectional shape having no concave portion include a circular shape (FIG. 2), an elliptical shape (FIG. 3), a rice ball-shaped circular shape (FIG. 4), and a polygonal shape of a triangle or more. One having a rounded corner (FIG. 5) is exemplified. These include
As shown in FIG. 2, when the tangent line (L ₁ ) is drawn, a plurality of contacts do not exist and only one contact (S ₁ ) exists.

On the other hand, the cross-sectional shape having the concave portion has a plurality of contacts (S ₂₁ , S ₂₂ ) when a tangent line (L ₂ ) tangent to the cross-sectional contour is drawn in the same cross-section, as described with reference to FIG. , A concave portion (U) is formed between the contact points, and a cross-sectional shape in which a convex portion is formed between the concave portion and the concave portion. The cross-sectional shape may be either a target type or an asymmetric type, and is not particularly limited by the size of the concave portion. Specific examples of such cross-sectional shapes are U-shaped (FIG. 6) and T-shaped.
Examples include a mold (FIG. 7), a four-leaf type (FIG. 8), a six-leaf type (FIG. 9), an eight-leaf type (FIG. 10), and a comb shape (FIG. 11). In these, as shown in FIG. 6, there is a tangent having a plurality of contact points when the tangent is drawn.

In the present invention, the cross-sectional shape having the concave portion is a cross-sectional shape having a value of 5 or more and 60 or less in terms of the degree of globalness defined below from the viewpoint of the feeling and water absorption when woven or knitted. Preferably, it is shaped. More preferably, the cross-sectional shape has a value of 10 or more and 40 or less, more preferably a cross-sectional shape having a value of 10 or more and 30 or less.

[0024] To explain the global level 7, and the global level LB, the low point of the recess of the tangent of the contact S ₃₁ and S ₃₂ to the length a, is formed between the two protrusions Percentage (%) of the ratio of the length b of the perpendicular drawn to the tangent
Say. That is, LB (%) = 100 × b / a In the present invention, the mixing ratio of the filament yarn having a cross-sectional shape having a concave portion and the filament yarn having a cross-sectional shape having no concave portion depends on the feeling and water absorption of a woven or knitted fabric. From the viewpoint of characteristics and the like, the ratio is preferably from 20:80 to 80:20, and more preferably from 40:60 to 60:40.

In the cross-sectional shape having a concave portion according to the present invention, the number of concave portions is preferably 2 or more and 20 or less from the viewpoint of the water absorption effect by the capillary phenomenon of the void structure and the effect of obtaining a smooth feeling of the knitted fabric. Preferably, the number is 2 or more and 8 or less.

Next, the composite state of the single filament having a cross section having a concave portion and the single filament having a cross section having no concave portion is such that each single filament is dispersed and mixed in a random state without distinction in cross section. Is important.

The mixed fiber state is as shown in FIG. 1. The single filaments having the respective cross-sectional shapes are not in a block-like group but are appropriately dispersed without distinction in the cross-sectional shape. When twisting is performed, the respective cross-sectional shapes are dispersed and arranged on the surface of the yarn, so that a smooth feeling and a mild luster can be obtained due to the combined effect of the cross section having the concave portion and the cross section having no concave portion.

In addition, since the filament yarn having a cross-sectional shape having a concave portion and the filament yarn having a cross-sectional shape having no concave portion are dispersed in a random state, meshing between the concave portion and the concave portion occurs when the number of twisting increases. Preventing the reduction in bulkiness from reducing opportunities, and further reducing the area of fiber-to-fiber contact when subjected to alkali weight loss,
It has extremely excellent drape properties.

On the other hand, in the case of a composite yarn having a core-sheath two-layer structure in which filament yarns having respective cross-sectional shapes are assembled, a smooth feeling due to a harmonious composite effect cannot be obtained, which is not preferable. .

Further, the mixed fiber composite yarn of the present invention comprises at least one kind of a single filament having a sectional shape having no concave portion,
It is important that at least one kind of the single filament having a cross section having the concave portion includes a single filament having a cross section capable of forming a gap between the cross sections of the single filaments when contacted.

This is because even if the single filament of the mixed fiber composite yarn is closely packed, voids are sufficiently formed between the filaments, and drape property and dry feeling can be obtained by twisting. A woven fabric or a knitted fabric to which effective water absorption by capillary action is imparted by voids generated in the arrangement of the multifilament having a cross section having no recess and the multifilament having a cross section having a recess.

Further, since the filament yarn having a cross-sectional shape having a concave portion is in a mixed state, a woven fabric having an excellent feeling of smoothness can be obtained even in a state of retaining the absorbed water, and the specific yarn described above can be obtained. By blending the cross-sectional shape with the concave portion having a relationship and the cross-sectional shape without the concave portion,
It is possible to provide a woven or knitted fabric that exhibits excellent water absorption even in a twisted state.

In addition, the mixed fiber composite yarn of the present invention is characterized in that a tangent line which is in contact with a convex portion of a cross section of a single filament having a concave portion and a convex portion adjacent to the convex portion has a difference between the two convex portions. It is preferable that the length of the vertical line lowered to the bottom point of the concave portion formed between the concave portions is smaller than the yarn radius of the filament having a cross-sectional shape having no concave portion. For example, say 7, and the convex portion of the cross section of the single filament cross-sectional shape having a recess, to the tangent L ₃ in contact with the convex portions adjacent to the convex portion, is formed between the two protrusions That is, the length of the perpendicular b lowered to the bottom point of the concave portion is smaller than the yarn radius of the single filament having a sectional shape having no concave portion.

In this case, since the single filament having no concave portion is not taken into the single filament having the concave portion, each single filament can easily move freely in the composite yarn when twisted, and the bulkiness is maintained. This is preferable because a smooth feel is obtained, the inter-fiber spaces are kept without being closed, and the water absorption is excellent.

The relationship between the single-filament fineness D1 of the filament yarn having a cross-section without a concave portion and the single-filament fineness D2 of the filament yarn having a cross-sectional shape with a concave portion is based on the feeling of sliminess to the feeling of a filament yarn having a cross-sectional shape without a concave portion. In terms of effectiveness,
It is preferably 0.5 ≦ D2 / D1, and it is more preferable that D2 / D1 ≦ 2.0 from the viewpoint of the effect on the feeling and the water absorption effect of the filament yarn having a cross section having a concave portion.

The filament yarn constituting the mixed fiber composite yarn of the present invention is made of a polyester polymer.
A polyethylene terephthalate polymer or a polyethylene terephthalate copolymer containing at least 85 mol% of ethylene terephthalate units is preferably used. What constitutes the filament yarn of each cross-sectional shape may be a different polymer type. In addition, the polyester constituting the filament yarn may contain a matting agent such as titanium oxide, a pigment, a light stabilizer, a flame retardant, and the like.

Next, a method for producing the mixed fiber composite yarn of the present invention will be described.

The mixed fiber composite yarn of the present invention obtains a polyester undrawn yarn in which a filament yarn having a cross section having a concave portion and a filament yarn having a cross section having no concave portion are mixed, and then subjected to a stretching step by a stretching machine. winding and Luca, obtained wound directly by the high-speed spinning. What is important is that a yarn obtained by blending filament yarns having different cross-sectional shapes in the spinning process is used.

Specifically, for example, it can be obtained by stretching the polyester undrawn yarn obtained by the steps shown in FIGS. The stretching process, once wound up,
It may be carried out or a method of directly stretching without winding.

Alternatively, by setting the take-up speed to 4500 m / min or more, the drawing step can be omitted to obtain the mixed fiber composite yarn of the present invention.

It is also possible to impart the convergence in the multifilament state by dispersing the arrangement of single filaments by subjecting the obtained composite mixed yarn to interlacing treatment with an interlace nozzle or the like to obtain an excellent feeling, a mixed fiber state and the like. From the perspective of
It is preferable to maintain the passability in the higher order process. As the number of confounds, it is preferable to perform confounding processing of 10 pieces / m or more, and more preferably 25 pieces / m or more.

FIGS. 12 to 14 are process schematic diagrams each showing an example of a method for obtaining the mixed fiber composite yarn of the present invention.

FIG. 12 shows that at least one type has no concave portion, and the other shape has at least one concave portion, and is constituted by two or more different types of spinning holes. A method is shown in which yarns spun from a piece of the die (A) are aligned and refueled, then mixed and bundled by an interlace nozzle, and taken up by a take-up roller.

FIG. 13 shows one spinneret (B) constituted by a spinning hole having no concave portion, and one spinneret constituted by a spinning hole having at least one concave portion. (C) shows a method in which the yarns spun from each of (C) are aligned and refueled, then mixed and bundled by an interlace nozzle, and are taken up by a take-up roller.

Further, FIG. 14 shows one spinneret (B) constituted by a spinning hole having no concave portion, and one spinneret constituted by a spinning hole having at least one concave portion.
This shows a method in which the yarns spun from each of the spinnerets (C) are refueled, then bundled, mixed and bundled with an interlace nozzle, and taken up by a take-up roller.

In particular, from the viewpoint of the mixed state of the constituent single filaments and the productivity, at least one type of discharge hole has a hole shape without a concave portion, and the other discharge holes have at least one concave portion. It consists of a discharge hole shape, 2
A method of spinning from a spinneret constituted by one or more types of discharge holes having different shapes and discharged from one and the same surface is preferable.

A single spinneret composed of two or more different types of spinning holes used in the present invention is, for example, a concentrically perforated one as shown in FIGS. 15 to 19 (FIG. 15). ), Those arranged in groups (FIGS. 16 and 17), those pierced in a lattice shape (FIGS. 18 and 19), and the like. In addition, the circle in the figure is a spinning hole having no concave portion,
× indicates a spinning hole having a concave portion.

On the other hand, a filament yarn having a concave portion is spun and wound once, and a filament yarn having no concave portion is spun separately therefrom. The method of stretching an undrawn yarn is not preferable because the mixed fiber state is relatively grouped and does not disperse.

From the viewpoint of improving the productivity, a method of winding a plurality of yarns from a single die can be preferably employed.

The shape of the discharge hole having a concave portion used in the present invention is, for example, as shown in FIG. 20, but the shape of the deformed yarn increases as the length E of the slit portion increases, and The shorter the distance before cooling (hereinafter, referred to as “cooling length”), the deeper the concave portion becomes and the lower the global degree LB.
Gives a large value. Conversely, as the length E of the slit portion is shorter and the cooling length is longer, the concave portion is shallower due to the surface tension in the molten state until it is cooled and solidified.
B becomes smaller.

Here, the preferred global degree LB of the single filament having a cross section having a concave portion of the present invention is 5 ≦ LB ≦
Although it is 50, it is preferable to select the cooling length between 50 mm and 200 mm in order to obtain the global degree in this range. Robalness LB of single filament with cross section having concave portion
Is less than 5, that is, when the cooling length is long, the slimy feeling becomes large and the smooth feeling and water absorption as the object of the present invention cannot be obtained, but the thickness unevenness in the longitudinal direction of the multifilament yarn becomes large. In addition, stains due to the polymer sublimate on the die surface are apt to accumulate, which results in a decrease in the spinning performance over time from the wiping of the die surface, that is, undesirably increases the yarn breakage.
On the other hand, if the LB exceeds 50, that is, if the cooling length is short, the texture of the present invention is not obtained because the texture becomes rough or rough and the texture of the present invention is not obtained. .

Next, the stretching conditions will be described.

FIG. 21 is a schematic process diagram showing an example of a stretching method in the method for producing a mixed fiber composite yarn of the present invention.

The unstretched polyester yarn obtained by the above method is stretched while being heated at a stretching ratio set between the heating roller 10 and the heat set stretching roller 11 via the supply roller 9 while being stretched.

The stretching temperature is preferably from 75 ° C. to 90 ° C.

If the stretching temperature is lower than 75 ° C., uneven spots are produced, and the fabric becomes defective due to spots. If the temperature exceeds 90 ° C., shrinkage occurs due to an increase in the yarn temperature before the stretching tension is applied during the heating process. It is not preferable because it causes spots.

After further elongation, the elongation temperature is higher than 16
If the heat setting is performed at 0 ° C. or less, the shrinkage may be adjusted appropriately. If the heat setting temperature is equal to or less than the elongation temperature, there is no great difference from the shrinkage of the polyester multifilament yarn immediately after the elongation. is there. When the heat setting temperature is 160 ° C. or more, shrinkage occurs in a part of the filament at the time of the heat setting.

On the other hand, by setting the drawing speed to 4500 m / min or more, the mixed fiber composite yarn of the present invention can be obtained without drawing.

When the mixed fiber composite yarn of the present invention is used in a woven fabric, the range of the number of twists of the twist twist that exhibits an excellent effect by twist twisting in the twisting step depends on the denier used. α · D ^{-1/2 where} T: number of twists [T / M] α: twist coefficient D: twist coefficient α in denier of yarn is in the range of 2400 ≦ α ≦ 22000.

When the filament shape of the conventional multifilament yarn is simple such as round or triangular, the number of twists of the strongly twisted fabric is 75 denier and 3000 T / M (twist coefficient α =
25980) is generally used, but in the case of the mixed fiber composite yarn of the present invention, excellent drape property at a low twist number of about 10% or less, excellent draping property and sharpness due to strong twisting, and smoothness due to cross-sectional composite effect different from the feeling In addition to obtaining mild luster and excellent water absorption, an excellent woven fabric that does not lose its smooth feeling even under water absorption can be obtained.

The mixed fiber composite yarn of the present invention may be a self-crimping yarn formed by two-component spinning of polymers having different shrinkage rates or melt viscosities. Is not lost.

Further, the mixed fiber composite yarn of the present invention can obtain a spun-like effect by performing a loop process by a Taslan process before forming a woven fabric.

Further, the mixed fiber composite yarn of the present invention can provide the same effect as that used in a woven fabric even when used in a knitted fabric.

[0064]

The present invention will now be described more specifically with reference to examples.

The water absorption was measured according to JIS L109.
6 The test was carried out by the following method, mutatis mutandis applying the Vilec method in "General Textile Test Method".

First, a test piece of 1 cm × about 20 cm is set as a sample, and five test pieces are taken in each of the horizontal directions. Next, as shown in FIG. 22, one end of the test piece is gripped and fixed, and about 2 cm of the other end is immersed in distilled water at 20 ° C. ± 2 ° C. Then 1
Water rising distance (mm) due to capillary action at 0 minutes (FIG. 22)
H) is measured (read to 1/2 mm), and expressed as an average value of up to 5 times each in the vertical direction (up to the integer place).

When the rise in water is difficult to read, put ink or a water-soluble dye (such as eosin) in distilled water, or attach a water-soluble dye (such as eosin) to the test piece in advance using a brush. Either method is used.

[Examples 1 to 6, Comparative Examples 1 to 5] Polyethylene terephthalate having an intrinsic viscosity [η] of 0.64 was formed into a three-leaf (Y-hole) cross-sectional shape having 24 round holes and concave portions.
The spinning is performed by spinning and aligning at a take-up speed of 3000 m / min by a process as shown in FIG. 14 using a die having 24 holes, each of which has 24 holes, 5 leaves, 6 leaves, and 8 leaves. Then, undrawn yarns of 261 denier and 48 filaments were obtained (Examples 1 to 5).

Also, using the same polyethylene terephthalate as described above, using a die having 24 round holes and a 6-leaf hole having a recessed cross section having a concave shape as shown in FIG. At a speed of 3000 m / min according to a conventional melt spinning method, and 261 denier 4
An 8-filament undrawn yarn was obtained (Example 6).

As a comparison, the same polymer was spun at a speed of 3000 m / min by a single-hole die having 24 round holes at a speed of 3000 m / min, aligned, and wound up (comparison). Example 1) Normal melt spinning at a speed of 3000 m / min in a process as shown in FIG. 12 using a die as shown in FIG. 16 in which 24 round holes and a triangular (onigiri type) hole having no concave portion are arranged. After being spun and aligned according to the method and wound up (Comparative Example 2), undrawn yarns of 261 denier and 48 filaments were obtained.

The undrawn yarn obtained by the above-mentioned method is
According to the process shown in FIG. 1, stretching is performed under the conditions of a stretching speed of 640 m / min, a temperature of the heating roller 10 (stretching temperature) of 85 ° C., a temperature of the heat set stretching roller 11 (fixed length heat setting temperature) of 106 ° C., and a stretching magnification of 1.776. After the heat setting, the yarn was successively taken up by the take-up roller 12 and further wound around the bobbin 13 to obtain a mixed fiber composite yarn.

The nine types of the obtained drawn yarns (Examples 1 to 6,
Comparative Examples 1 and 2) and a round cross-section yarn 75 denier 24 filaments and 8 obtained by ordinary separate spinning and drawing steps
Leaf cross section yarn 75 denier 24 filaments obtained by twisting 1
50 denier 48 filament rear composite yarn (Comparative Example 3)
In each case, the number of twisted twists was 300 T / M (twist coefficient α = 36
74) and 1500 T / M (twist coefficient α = 18371)
Is applied as a warp and a normal round cross-section stretched yarn 50 denier 36 filaments as a satin-textured weft,
Processed in the usual dyeing process. The alkali loss was 25%.

With these weft driving counterfeiting, drape,
A gloss sensory comparison test was performed. Table 1 shows the results. The double circles in the table are particularly excellent, the circles are excellent, the triangles are slightly inferior, and the crosses are inferior.

[0074]

[Table 1] Fabric obtained from the mixed fiber composite yarn of the present invention (Examples 1 to 6)
Was a woven fabric having a smooth feel, excellent drape, mild luster, and excellent water absorption, which is different from the sharpness of the conventional strong twist.

On the other hand, the comparative products (Comparative Examples 1 to 3)
The hand was inferior, and the twist number of 1500 T / M was inferior in drapability and poor in water absorption.

[0076]

According to the present invention, the drape property and the dry feeling can be obtained by the twisting, and the swelling and the soft feeling different from the sharp feeling of the hard feeling by the conventional strong twisting, Soft and mellow texture
The present invention can provide a mixed fiber composite yarn which can be made into a woven or knitted fabric having water absorbency, and the above-mentioned knitted woven fabric.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of the mixed fiber composite yarn of the present invention.

FIG. 2 is a schematic explanatory view illustrating a fiber cross-sectional shape having no concave portion in the present invention.

FIG. 3 is a schematic explanatory view illustrating a fiber cross-sectional shape having no concave portion in the present invention.

FIG. 4 is a schematic explanatory view illustrating a fiber cross-sectional shape having no concave portion in the present invention.

FIG. 5 is a schematic explanatory view illustrating a fiber cross-sectional shape having no concave portion in the present invention.

FIG. 6 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 7 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 8 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 9 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 10 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 11 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 12 is a schematic process diagram showing an example of a spinning process of a method for obtaining a mixed fiber composite yarn of the present invention.

FIG. 13 is a schematic process diagram showing an example of another spinning process for obtaining the mixed fiber composite yarn of the present invention.

FIG. 14 is a schematic process diagram showing an example of still another spinning process of the method for obtaining a mixed fiber composite yarn of the present invention.

FIG. 15 is a schematic plan view showing an example of a base used in the present invention.

FIG. 16 is a schematic plan view showing another example of the base used in the present invention.

FIG. 17 is a schematic plan view showing still another example of the base used in the present invention.

FIG. 18 is a schematic plan view showing still another example of the base used in the present invention.

FIG. 19 is a schematic plan view showing still another example of a die used in the present invention.

FIG. 20 is a schematic view showing an example of a discharge hole having a concave portion of a base used in the present invention.

FIG. 21 is a schematic process diagram showing an example of a stretching process of a method for obtaining a mixed fiber composite yarn of the present invention.

FIG. 22 is an explanatory diagram illustrating a method for measuring water absorption by a birec method.

[Explanation of symbols]

 1: Base 2: Chimney 3: Refueling guide 4: Interlace nozzle 5: Take-up roller 6: Package 7: Undrawn yarn 8: Guide 9: Supply roller 10: Heating roller 11: Heat set drawing roller 12: Take-up roller 10 ', 11 ', 12': separation roller 13: bobbin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI D02G 3/22 D02G 3/22 3/26 3/26 D02J 1/22 D02J 1/22 P D03D 15/00 D03D 15/00 B (56) References JP-A-57-193559 (JP, A) JP-A-54-106648 (JP, A) JP-A-6-103823 (JP, A) JP-A 8-218241 (JP, A) Patent 2964639 (JP, B2) Patent 2639284 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-13/00 D01D 5/24- 5/253 D01D 5/28-5/36

Claims (10)

(57) [Claims] 1. A polyester multifilament yarn comprising two or more types of single filaments having different cross-sectional shapes dispersed and mixed in a random state, wherein at least one
Type of monofilament consists sectional shape having no recess, the other single filaments have a recess, the recess
A convex portion of a cross section of a single filament having a cross-sectional shape,
At least one kind of a single filament having a cross-sectional shape having a concave portion formed between the convex portion adjacent to the portion and having no concave portion, and a single filament having a cross-sectional shape having the concave portion A mixed fiber composite yarn having a cross-sectional shape that forms a void between the cross-sections of the single filaments when contacted with at least one of the single filaments. 2. A bottom point of a concave portion formed between the two convex portions with respect to a tangent to a convex portion of a cross section of a single filament having a concave portion and a convex portion adjacent to the convex portion. 2. The length of a perpendicular line lowered from the thread is smaller than a yarn radius of a single filament having a cross-sectional shape having no concave portion.
2. The mixed fiber composite yarn according to item 1. 3. The mixed fiber composite yarn according to claim 1, wherein the degree of globality of the single filament cross-sectional shape having the concave portion is 5 or more and 60 or less. 4. A single filament bag having two or more different cross-sectional shapes obtained by melt spinning of a polyester polymer.
Chino consists sectional shape not having at least one single filament recess, have a single filament recesses otherwise, the cross-sectional of the single filament cross-sectional shape having a recess
Formed between the convex part of the surface and the convex part adjacent to the convex part
The two before taking off polyester multifilament yarn consisting of single filaments sectional shape recess is present
Single filaments with different cross-sectional shapes
A method for producing a mixed-fiber composite yarn, comprising heating and stretching a polyester undrawn yarn or a pre-oriented yarn obtained by dispersing, bundling, and taking off in a state . 5. The method for producing a mixed fiber composite yarn according to claim 4, wherein after the stretching, a confounding treatment is performed at a confounding number of 10 pieces / m or more. 6. A single filament bag having two or more different cross-sectional shapes obtained by melt spinning of a polyester polymer.
Chino consists sectional shape not having at least one single filament recess, have a single filament recesses otherwise, the cross-sectional of the single filament cross-sectional shape having a recess
Formed between the convex part of the surface and the convex part adjacent to the convex part
The two before taking off polyester multifilament yarn consisting of single filaments sectional shape recess is present
Single filaments with different cross-sectional shapes
A method for producing a mixed-fiber composite yarn , comprising dispersing and bundling a mixed fiber in a state, and drawing the mixed fiber at a speed of 4500 m / min or more. 7. The method for producing a mixed fiber composite yarn according to claim 6, wherein, after drawing at a speed of 4500 m / min or more, a confounding process of 10 or more confounds is performed. 8. At least one kind of discharge hole has a hole shape without a concave portion, and the other discharge holes have a hole shape having at least one concave portion. The method for producing a mixed fiber composite yarn according to claim 4 or 6, wherein the polyester polymer is melt-spun from a spinneret which is discharged from one and the same surface. 9. A polyester multifilament yarn composed of two or more kinds of single filaments having different cross-sectional shapes dispersed and mixed in a random state , wherein at least one polyester filament is formed.
Type of monofilament consists sectional shape having no recess, the other single filaments have a recess, the recess
A convex portion of a cross section of a single filament having a cross-sectional shape,
At least one kind of a single filament having a cross-sectional shape having a concave portion formed between a convex portion adjacent to a portion and having no concave portion, and a single filament having a cross-sectional shape having the concave portion Is a cross-sectional shape in which a void is formed between the cross-sections of the single filaments when in contact with each other, and the twisted fiber α in the following formula is twisted in a range of 2400 or more and 22000 or less. A knitted or woven fabric comprising a composite yarn. T = α · D ^{-1/2 where} T: number of twists [T / M] α: twist coefficient D: fineness of yarn [denier] 10. The knitted and woven fabric according to claim 9, wherein the single filament having a concave portion constituting the mixed fiber composite yarn has a degree of globalness of 5 or more and 60 or less.