JP3178243B2 - 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, and more particularly to a smooth feel, a drape property and a span tone having a swelling feeling different from the sharpness of a conventional strong twist. The present invention relates to a mixed fiber composite yarn suitable for a woven or knitted fabric having a natural appearance, a method for producing the same, and a knitted fabric.

[0002]

2. Description of the Related Art Conventionally, polyester multifilament yarns can impart excellent drapability to woven fabrics, can express an elegant silhouette especially in women's clothing, and have excellent characteristics of easy care which is hard to wrinkle when worn. Because of this, it is widely used for outerwear.

In order to impart drapability, the polyester multifilament yarn is obtained by subjecting the polyester multifilament yarn to strong twisting, then weaving and knitting, and reducing the alkali of the obtained greige in the dyeing step.

The application of strong twist not only has the effect of imparting drape to the woven fabric, but also has the effect of removing the waxy feeling of the woven fabric and imparting a dry-feeling crispness. This crispness differs depending on the number of twisted twists. If the number of twists is excessively high, the hand becomes hard and the texture becomes unpleasant jarring.

[0005] Also, as the number of twisted twists increases, the drape property increases, but as a negative effect, the fiber aggregate becomes a tight structure and lacks a swelling feeling. For this reason, what is called a "new synthetic fiber" has been developed as a woven fabric having a unique texture of synthetic fiber which has a swelling due to the number of twists in the strong twist region for obtaining an excellent drape property as a twisted twist number.

[0006] However, increasing the number of twists is disadvantageous in terms of cost, and there is a problem that excellent gloss is also reduced.

On the other hand, knitted fabrics made of synthetic fibers in recent years are:
Although a novelty different from the conventional one is achieved when the knitted fabric is viewed or touched, it has a drawback that when worn as a garment, the hygroscopicity and the water absorption are remarkably inferior to those made of natural fibers.

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

In the case of a polyester multifilament yarn, the moisture absorption is improved by graft polymerization or mixing or copolymerization of a substance having hydrophilicity, and the water absorption is improved by the multifilament aggregate having a cross-sectional shape in addition to the above technology. There is a method to improve by using the capillary technology of the above, but as described above, as a high-order processing means for imparting a new texture, when twisted into a multifilament yarn, those that can not demonstrate the water absorption effect, or There are problems such as the necessity of alkali weight reduction, and there has been a problem in obtaining water absorbency in applications that require water absorption in fields that require additional twisting and fields that do not require alkali weight reduction.

[0010]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a drape property and a dry feeling by twisting. A mixed fiber composite yarn capable of providing a woven / knitted fabric having a swelling / soft feeling, a mellow and dry texture, and a spun-like appearance, a method for producing the same, and a knitted fabric having water absorption. The purpose is to provide.

[0011]

The present invention has the following construction to achieve the above object.

That is, in a polyester multifilament yarn formed by 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. The monofilament has a cross section of a single filament having a concave portion, and at least one type of a single filament having a cross section having no concave portion, and at least one type of a single filament having a cross section having the concave portion,
A mixed fiber composite yarn having a cross-sectional shape in which a void is formed between the cross-sections of the single filaments when contacted, and further having the following characteristics.

1.5 ≦ U% ≦ 15 (1) 8 ≦ ΔSW (%) ≦ 80 (2) where U% is Worcester spots and ΔSW indicate boiling water shrinkage.

Further, at least one kind of single filament obtained by melt spinning of a polyester polymer has a cross-sectional shape having no concave portion, and the other single filament has a cross-sectional shape of a single filament having a concave portion. A method for producing a mixed fiber composite yarn, comprising heating and stretching a polyester undrawn yarn obtained by bundling and drawing a mixed fiber before drawing it at a draw ratio of the following formula.

0.70 × NDR ≦ R ≦ 0.98 × NDR (3) where NDR is a natural drawing ratio of the polyester undrawn yarn,
R indicates the magnification.

Furthermore, a polyester multifilament yarn composed of two or more types of single filaments having different cross-sectional shapes dispersed and mixed, wherein at least one type of single filament has a cross-sectional shape having no concave portion,
The other single filament has a cross section of a single filament having a concave portion, and at least one kind of a single filament having a cross section without the concave portion and at least one type of a single filament having a cross section having the concave portion are in contact with each other. thick and thin yarn Ru sectional shape der forming the gaps between those of the single filament cross-section when
The mixed fiber composite yarn having a portion has the following characteristics: 1.5 ≦ U% ≦ 158 8 ≦ ΔSW ≦ 80 Furthermore, the twist coefficient α in the following equation is 2400 or more and 220
A knitted fabric characterized by comprising a mixed fiber composite yarn twisted in the range of 00 or less used as a warp and / or a weft.

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 characteristics of the mixed fiber composite yarn of the present invention are the cross-sectional shape of the multifilament yarn and its composite state, and it is possible to obtain excellent drapability and dry feeling by twisting the number of twists below the conventional strong twist region. In addition, a new effect is to obtain a unique smooth feeling with a mellow and dry texture. Furthermore, the woven or knitted fabric using the mixed fiber composite yarn of the present invention can exhibit a water absorbing effect due to the cross-sectional structure of the mixed fiber composite yarn and the void structure between the multifilaments generated by the mixed fiber state. In addition, when the multifilament yarn is twisted, the change in the void structure is small, the water absorbing effect is maintained, and a smooth feeling without stickiness is obtained even in a water retaining 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 formed of a filament yarn having a cross-sectional shape without a concave portion, and the other single filaments are formed of a single filament cross-sectional shape having a concave portion. is important.

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

FIG. 2 is a schematic sectional view showing a thin yarn portion of an example of the mixed fiber composite yarn of the present invention.

FIG. 3 is a schematic sectional view showing an intermediate portion of an example of the mixed fiber composite yarn of the present invention.

FIGS. 1 to 3 show examples of single-filament yarns having a round cross section having no concave portion and a six-leaf cross section having a concave portion having a concave portion.

In the mixed fiber composite yarn of the present invention, the twisted composite yarn is subjected to additional twisting due to the presence of the projections (protrusions formed between the depressions) having the cross-sectional shape having the depressions. Then, the surface irregularities of the multifilament, which is different from the surface irregularities caused by the twisting structure due to the twisting, create a smooth feel and feel as the hand feeling, and the slimy filament having a cross-section filament yarn without one concave portion A new feeling is achieved in harmony with the feeling.

Further, the mixed fiber of the present invention has a thick yarn portion and a fine yarn portion in the length direction of the filament depending on the specific stretching conditions.

4 to 13 are explanatory diagrams for explaining the cross-sectional shape of the fiber. To explain in more detail with reference 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. , Undrawn yarn has no recess (cross section without multiple contacts)
It also means that it includes a cross-sectional shape that is partially depressed due to contact with an adjacent yarn during false twisting. Specific examples of the cross-sectional shape without the concave portion include a circle (FIG. 4), an ellipse (FIG. 5), a rice ball-shaped circle (FIG. 6), and a polygon having a triangle or more, and are relatively rounded at corners. (FIG. 7). These do not have multiple contacts when the tangent (L ₁ ) is drawn, as shown in FIG.
There is only one contact (S ₁ ).

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 cross-sectional shape in which a concave portion (U) is formed between the contact points. Further, 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 include V-shaped (FIG. 8), T-shaped (FIG. 9), 4-leaf (FIG. 10), 6-leaf (FIG. 11), 8-leaf (FIG. 12), Comb shape (FIG. 13) is mentioned. As shown in FIG. 8, there are tangents having a plurality of contact points when the tangents are drawn.

In the present invention, the cross-sectional shape having a 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. It is preferred that 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.

[0029] To explain the global level 9, and the global level LB,該接line tangent to the contact S ₃₁ and S ₃₂ to the length a, from the bottom of the recess formed between the two protrusions Percentage (%) of the ratio of the length b of the vertical line dropped to
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 sex, the ratio is preferably 20:80 to 80:20,
The ratio is more preferably 0:60 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 texture of the knitted fabric. Preferably, the number is 2 or more and 8 or less.

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

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 twisted, each cross-sectional shape is dispersed and arranged on the surface of the yarn, so a smooth feeling and a length direction of each multifilament due to the combined effect of the cross section with the concave section and the cross section without the concave section A swelling feeling and a spun-like appearance can be obtained by the synergistic effect of the different shrinkage effect of the thick yarn portion and the thin yarn portion having different birefringences.

Further, 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 randomly dispersed, meshing between the concave portion and the concave portion occurs when the number of twisting increases. Prevents a decrease in bulkiness due to a reduced chance, reduces fiber contact in the length direction between multifilaments due to the difference in shrinkage of the thick and thin part, and furthermore, a fiber-to-fiber contact area when alkali weight loss is applied This results in a very excellent drapability effect due to a reduction in the coefficient of friction.

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 is characterized in that at least one kind of a single filament having a cross section without a concave portion and at least one kind of a single filament having a cross section having the concave portion come into contact with each other. It is important to include single filaments having a cross-sectional shape capable of forming voids between the single filament cross sections.

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 or 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. In addition, since the filament yarn having a cross-sectional shape having a concave portion is in a mixed state, it is possible to obtain a knitted fabric having a feeling excellent in a smooth feeling even in a water retaining state of absorbed water, further satisfying the specific relationship. By blending the cross-sectional shape with concave portions and the cross-sectional shape without concave portions,
It is possible to provide a knitted or woven fabric that exhibits excellent water absorption even in a twisted state.

Further, 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 from 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, referring to FIG. 9, a tangent line L ₃ that 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 is formed between the two convex portions. The length b of the perpendicular dropped from the bottom of the recess
Is smaller than the yarn radius of a single filament having a cross-sectional shape without a 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.

Further, the single filament having a cross section having no concave portion has a minimum radius of curvature of a concave portion formed by the convex portion of the cross section of the single filament having a cross section having the concave portion and the convex portion adjacent to the convex portion. Preferably, the shape has a larger fiber radius. This is because a filament yarn having a cross section having no concave portion is prevented from engaging with the concave portion of the filament having a cross section having the concave portion, and the drape property effect is not hindered. On the other hand, JP-A-4-3166
No. 24, a special bulky processed yarn having a specially shaped filament yarn having a deformed section modulus of 2.0 or more and having a false twist crimp as a core yarn and a false twist crimped yarn thinner than the core yarn as a sheath yarn. However, the specially shaped filament yarn used here has a shaped section modulus of 2.0 or more, that is, a long leaf. (The convex portion) is easily deformed, and the leaves interlock with each other, or the round cross-section yarn engaged with the concave portion is taken into the leaves, thereby closing the interfiber space, and the smooth feeling of the present invention cannot be obtained. It is not preferable. The mixed fiber composite yarn of the present invention is preferably less than 2.0, more preferably 1.9 or less, in terms of the modified section modulus defined in JP-A-4-316624.
More preferably, it is 1.8 or less.

As the filament yarn constituting the mixed fiber composite yarn of the present invention, a filament yarn composed of a polyester polymer is used.
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.

The relationship between the single yarn fineness D1 of the filament yarn having a cross-section without a concave portion and the single yarn fineness D2 of the filament yarn having a cross-sectional shape with a concave portion is 0.5 ≦ D2 / D1 ≦ 2.0.
It is preferable that both D1 and D2 are 10 deniers or less. When D2 / D1 is less than 0.5,
The effect of the filament yarn having a cross section having no concave portion is increased to give a strong feeling of slimy feeling. When D2 / D1 exceeds 2.0, the effect of the filament yarn having a cross section having a concave portion is increased, and the grain becomes rough. It tends to have a feeling of feeling.

Further, the boiling water shrinkage of the mixed fiber composite yarn of the present invention is 8% or more and 80% or less as the mixed fiber composite yarn as measured by the method B (cut shrinkage) of JIS L1073 (test method for synthetic fiber filament yarn). And the relationship between the boiling water shrinkage ratio SW1 of the cross-sectional shape filament yarn having no concave portion and the boiling water shrinkage ratio SW2 of the cross-sectional shape filament yarn having the concave portion is preferably 3% ≦ SW1−SW2 ≦ 20%, Outside this range, the effect of the cross-sectional shape having the concave portion tends to be too large.

Next, the multifilament composite yarn has a thick and thin portion (a thick yarn portion and a thin yarn portion) in the multifilament of the undrawn yarn according to the specific stretching conditions, so that the multi-filament swells in the woven fabric, and has a drape property. It greatly contributes to effects such as smoothness.

The birefringence difference between the filaments caused by the simultaneous spinning of the filament yarn having the cross section having the concave portion and the filament yarn having the cross section having no concave portion, and the thick yarn portion and the thin yarn portion of each filament generated by the stretching. A difference in shrinkage due to a difference in birefringence between the thick and thin yarn portions is generated.

This difference in shrinkage rate is randomly dispersed by single fiber migration during stretching or heat treatment during fiber mixing by interlacing, and the twisting of composite mixed fiber yarns and the dyeing process of woven fabric In this case, it is considered that a difference in shrinkage in and between the multifilaments acts to reduce the contact area between the multifilaments, and greatly contributes to swelling, drapeability and smooth touch in the woven fabric.

The thick and thin portion is measured in Uster plaque U%, and as a U% value, 1.5 ≦ U% ≦ 15
It is important that When it is less than 1.5%, it is related to the boiling water shrinkage ratio, but the difference in shrinkage ratio between single yarns or within a single yarn is small, especially the contribution to the swelling effect is small, and the spun-like appearance is poor. On the other hand, if it is 15% or more, the effect of the thin portion tends to be hard, the spun-like appearance is sharp, and the unpleasantness tends to increase.

The thick yarn portion of the composite mixed yarn has a relatively low birefringence and a relatively large number of amorphous portions, so that it has relatively high dyeability and forms a deep dyed portion. Since the refraction is relatively high and the amorphous portion is relatively small, the dyeability is relatively low, and it can be confirmed from the formation of a lightly dyed portion.

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 is obtained by obtaining 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 stretching. Can be
What is important is that the unwoven polyester yarn is obtained by blending and bundling the fibers before being taken up by the take-off roller in the spinning process, and by blending filament yarns having different cross-sectional shapes. Specifically, for example, it can be obtained by the steps shown in FIGS. The stretching step may be performed after winding once, or may be a method of directly stretching without winding.

In addition, it is possible to obtain an excellent feeling and a mixed fiber state by imparting a bunching property in the state of multifilament by dispersing the arrangement of single filaments by subjecting the obtained composite mixed fiber to interlacing treatment with an interlace nozzle or the like. From the viewpoint of the above, it is preferable from the viewpoint of maintaining the passability in the higher order process. As the number of confounds, a confounding treatment of 10 pieces / m or more is preferable. More preferably, the number is 25 or more / m.

FIGS. 14 to 16 are schematic process diagrams showing examples of the spinning process of the method for obtaining the mixed fiber composite yarn of the present invention. FIG. 14 shows that at least one type has a shape without a concave portion and the other shape has a shape with a concave portion.
This shows a method in which yarn spun from a single spinneret (A) composed of spin holes of different types or more is bundled and refueled, then mixed and bundled by an interlace nozzle, and taken up by a take-up roller.

FIG. 15 shows one spinneret (B) constituted by a spinning hole having no concave portion, and one spinneret (C) constituted by a spinning hole having a concave portion. A method is shown in which the spun yarns are bundled and lubricated, then mixed and bundled by an interlace nozzle, and taken up by a take-up roller.

Further, FIG. 16 shows one spinneret (B) composed of a spinning hole having no concave portion, and one spinneret (C) composed of a spinning hole having a concave portion. The following shows a method of bundling and lubricating the yarns spun from each of the above, then bundling, bundling and bundling the fibers with an interlace nozzle, and drawing the fibers with a take-off roller.

Among them, from the viewpoint of the mixed state of each constituent filament yarn and the productivity, at least one type is a shape having no concave portion and the other shape is a shape having a concave portion. A method of spinning out a molten polyester polymer from a single spinneret constituted by a spin hole having a shape is preferable.

One spinneret composed of two or more types of spinholes of different shapes used in the present invention is, for example, a concentrically perforated one as shown in FIGS. 17 to 21 (FIG. 17). ), Those arranged in groups (FIGS. 18 and 19), those pierced in a lattice shape (FIGS. 20 and 21), 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 polyester yarn obtained by spinning a filament yarn having a concave portion and winding it once, separately spinning a filament yarn having no concave portion and winding the yarn once, and then aligning and blending the resulting yarn. The method of drawing and processing an undrawn yarn is not preferable because the mixed fiber state is relatively unstructured and not random.

From the viewpoint of improving productivity, a method in which a plurality of yarns are wound from a single die can also 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. 22, 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. That is, from the viewpoint of preventing accumulation of polymer sublimate (dirt) on the spinneret surface during spinning and a decrease in the yarn production performance, the cooling length 2
The cooling length is preferably not more than 00 mm, and from the viewpoint of preventing the spinning performance due to a decrease in the die temperature, the cooling length is preferably not less than 50 mm.

FIG. 23 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 heating through a hot pin set between a feed roller and a draw roller. The stretching conditions are as follows: The natural drawing ratio (Natural DrawRati) of the polyester undrawn yarn is pre-heated at 70 ° C to 90 ° C using a hot pin or a hot roller.
o; NDR), it is desirable to stretch within the range of the following formula.

0.70 × NDR ≦ R ≦ 0.98 × NDR where NDR is the natural drawing ratio of the polyester undrawn yarn,
R indicates the magnification. Following stretching, winding without heat treatment, or heat treatment of fixed length or relaxation heat treatment with a hot plate or hot roller provided between the draw roller and the relax roller at a temperature of 80 to 180 ° C. (Due to the speed difference of the relax roller). Further, an interlacing process may be performed before winding.

Among the characteristics of the stretched yarn thus obtained, the wicker wrinkle U% and the boiling water shrinkage ΔSW of the filament yarn are important as the thick and thin effect. Where 1.5
When ≦ U% ≦ 15 and 8 ≦ ΔSW (%) ≦ 80, the effect when woven or knitted is obtained.

After the heating and stretching, a confounding treatment of 10 entangles / m or more is carried out. Performing the confounding treatment at a rate of at least / m is preferable from the viewpoint of excellent feeling, mixed state, and the like.

The effect of thick and thin is as follows:
The change in birefringence between single yarns occurs in combination with the difference in birefringence of undrawn yarn spun as a multifilament composite yarn of a multifilament having a cross-sectional shape having a concave portion and a multifilament yarn having a cross-sectional shape having no concave portion, After twisting the multifilament yarn, in the relaxation heat treatment or the tension heat treatment in the weaving process, the difference in the birefringence between the single yarns causes the difference in the shrinkage rate, and the bulging occurs due to the difference in the yarn length between the single yarns at the micro level. The effect of reducing the contact area between 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 is an effect of reducing fiber-to-fiber friction.

The boiling water shrinkage ratio is an effective characteristic because there are a portion that contributes as a shrinkage ratio between single yarns of the thick and thin and a portion where the shrinkage ratio as an aggregate contributes to the swelling of the woven fabric structure. When the boiling water shrinkage is in the range of 8% or more and 30% or less, twist-twisting is performed, a twisting set is performed, and a supply yarn woven fabric can be manufactured in the next weaving knitting step.
% And 80% or less, the shrinkage is large, and when used as a twisted set after twisting, there is a large variation in shrinkage due to the difference between the inner and outer layers. Therefore, a woven or knitted fabric having a different texture can be obtained by performing a heat treatment in a separate step to lower the shrinkage rate level or performing false twisting.

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

When the conventional multifilament yarn has a single filament shape such as a round or a triangle, the number of twists of the strongly twisted fabric is 75 deniers, 3000 T / M (twist coefficient α =
25980) is generally used, but in the case of the mixed fiber composite yarn of the present invention, the drape property is excellent at a low twist number of about 10% or less, excellent draping property, strong twisting, and crispness due to cross-sectional composite effect different from hand And mild luster.

Preferably, the mixed fiber composite yarn of the present invention has substantially no crimp. In a woven or knitted fabric, there is no crimp obtained by false twisting or the like, so that a smooth feeling and mild luster can be obtained. can get.

Further, the mixed fiber composite yarn of the present invention can be spun like by subjecting it to loop processing by taslan processing before it is woven or knitted.

A woven or knitted fabric using a blended composite yarn of a filament yarn having a cross section having a concave portion and a filament yarn having a cross section having no concave portion may have an alkali when the greige machine is put into a dyeing process and processed. Drapability is imparted by weight loss. Generally, the method of reducing the alkali in the production process of the dyeing process is roughly divided into a method of performing in a continuous process and a method of performing in a batch method. These methods have merits and demerits as new effects depending on the characteristics of the yarn used. When reducing the alkali weight of a woven or knitted fabric made of a blended composite yarn consisting of a filament yarn having a cross section having a concave portion and a multifilament yarn having a cross section shape having no concave portion, when the method is carried out by a continuous method, for example, a method using a pad steamer, particularly drape The effect and smooth dryness are effective in the case where there is no twisting or the region where the number of twisting is low. The reason for this is that, in the case of the continuous method, the filament yarn is immersed in a NaOH solution, squeezed to the amount of NaOH necessary for the alkali weight loss rate, and hydrolyzed at a high temperature in a short time. It is considered that there is a large amount of NaOH solution for hydrolysis in the concave portion of the filament yarn having a cross-sectional shape having the above, and the weight loss effect is promoted. Also, it is thought that the thick part of thick and thin (the part with large fineness and low birefringence) is easy to lose weight due to low orientation degree and large surface area among fibers, and it is easy to generate craters. Can be

[0072]

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. 24, 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).

If 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.

[Example 1] Polyethylene terephthalate having an intrinsic viscosity [η] of 0.64 was used with a die in which 12 round holes and 12 hexagonal (hexalobal) holes were arranged as shown in FIG. Spinning was performed at a speed of 3000 m / min by a process as shown in FIG. 15 to obtain an undrawn yarn of 130 denier, 24 filaments, and a single filament having a six-lobe cross section (roval degree: 26).

Next, the undrawn yarn was stretched using a drawing machine as shown in FIG.
Drawing was performed at 1.45 to obtain a drawn yarn having a boiling water shrinkage of 89 denier of 72% and a U% of 8.9%.

The stretched yarn was twisted at 300 T / M with a double twister, and the warp was used for warp in a weaving process. A warp was set in a water jet loom and a regular polyester multifilament 75 denier 72 filament (round section) twisted at 3000 T / M was used as a weft, and a plain weaving machine was created. This greige was dyed and finished in a general dyeing process of a polyester continuous fiber woven fabric. The alkali weight loss was performed by a pad steam type continuous weight loss method.

The obtained woven fabric is a woven fabric having a spun-like appearance which is different from ordinary woven fabrics using polyester multi-filaments having a round or triangular cross section, which has a smooth dry feeling and excellent drapability and repulsion. was gotten.

[Examples 2 to 7, Comparative Examples 1 to 3] Polyethylene terephthalate having an intrinsic viscosity [η] of 0.64 was formed into a three-leaf (Y-hole) having a cross section having 24 round holes and concave portions.
After spinning and aligning at a take-off speed of 3000 m / min by a process as shown in FIG. 16 using a die having 24 holes, each of which has 24 leaves, 5 leaves, 6 leaves, and 8 leaves, respectively, by a normal melt spinning method. Then, undrawn yarns of 228 denier and 48 filaments were obtained (Examples 2 to 6).

Using the same polyethylene terephthalate as described above, using a die having 24 round holes and 24 6-leaf holes having a concave section and having a sectional shape as shown in FIG. By spinning at a take-up speed of 3000 m / min by an ordinary melt spinning method to obtain an undrawn yarn of 228 denier and 48 filaments (Example 7). For comparison, the same polymer was used and the round hole 24 was used.
With the process of FIG.
After being spun at a take-up speed of m / min and drawn and aligned, it was rolled up (Comparative Example 1), and arranged as shown in FIG. 18 in which 24 round holes and 24 triangular (onigiri type) holes having no concave portion were arranged. Using a spinneret at a take-off speed of 3000 m / min by a process as shown in FIG. 14 by a normal melt-spinning method, winding and then winding (Comparative Example 2), each of which was 228 denier and 48 filament undrawn Yarn was obtained.

The undrawn yarn obtained by the above-described method is
By the process shown in FIG. 3, the stretching speed is 640 m / min, the temperature of the heating pin 9 (stretching temperature) is 74 ° C., the temperature of the hot plate 12 (constant length heat setting temperature) is 102 ° C., and the stretching magnification is 1.55.
After stretching under the conditions of 1 and heat setting, it was subsequently taken up by the take-up roller 13 and further wound up on the bobbin 14 to obtain a mixed fiber composite yarn.

Nine varieties of the obtained stretched yarns (Examples 2 to 5)
7, Comparative Examples 1 and 2) and a round cross-section yarn 75 obtained under the same spinning and stretching conditions but in different steps.
150 denier 48 obtained by combining 24 denier 24 filaments and 75 denier 24 filaments with 8-leaf cross section yarn
The post-filament composite yarn of the filament (Comparative Example 3) was given a twist number of 300 T / m (twist coefficient α = 3676) and 1 twist, respectively.
500 T / m (twisting coefficient α = 18371) was applied, and it was driven as a warp yarn as a weft having a normal round cross-section stretched yarn of 50 denier and 36 filaments and a satin structure, and processed in a usual dyeing process. The alkali reduction was performed at 25%.

A sensory comparison test of hand, drape, and gloss was performed on the basis of the weft driving. Table 1 shows the results.
Shown in In the table, double circles are particularly excellent, circles are excellent, triangles are slightly inferior, ×
The mark indicates inferior.

[0085]

[Table 1] Fabric obtained from the mixed fiber composite yarn of the present invention (Examples 1 to 7)
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.

[0087]

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 conventional hard texture by the strong twisting can be obtained. It is possible to provide a mixed fiber composite yarn having a smooth and mellow texture and a spun-like appearance and capable of forming a woven fabric having water absorbency, and the woven fabric.

[Brief description of the drawings]

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

FIG. 2 is a schematic cross-sectional view showing a thin yarn portion of an example of the mixed fiber composite yarn of the present invention.

FIG. 3 is a schematic cross-sectional view showing an intermediate portion of an example of the mixed fiber composite yarn of 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 no concave portion in the present invention.

FIG. 7 is a schematic explanatory view illustrating a fiber cross-sectional shape having no concave portion in 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 explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

FIG. 13 is a schematic explanatory view illustrating a fiber cross-sectional shape having a concave portion according to the present invention.

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

FIG. 15 is a process schematic diagram showing an example of another spinning process for obtaining the mixed fiber composite yarn of the present invention.

FIG. 16 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. 17 is a schematic plan view showing an example of a base used in the present invention.

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

FIG. 21 is a schematic plan view showing still another example of the base used in the present invention.

FIG. 22 is a schematic view showing an example of a discharge hole having a concave portion of a base used in the present invention.

FIG. 23 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.

FIG. 24 is an explanatory diagram illustrating a method of measuring water absorption by a birec method.

[Explanation of symbols]

 1: base 2: chimney 3: lubrication guide 4: interlace nozzle 5: take-up roller 6: package 7: undrawn or semi-drawn yarn 8: feed roller 9: heating pin 10: draw roller 11, 11 ': guide 12: Hot plate 13: Take-off roller 14: Bobbin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI D02J 1/00 D02J 1/00 K 1/22 1/22 Q D03D 15/00 D03D 15/00 BD (56) References Special JP-A-57-193559 (JP, A) JP-A-54-106648 (JP, A) JP-A-8-218241 (JP, A) Patent 3119066 (JP, B2) 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, wherein at least one type of single filament has a cross-sectional shape having no concave portion. When a single filament has a cross section of a single filament having a concave portion, and at least one type of a single filament having a cross section having no concave portion and at least one type of a single filament having a cross section having the concave portion come into contact with each other. A mixed fiber composite yarn having a cross-sectional shape in which a void is formed between the cross-sections of the single filaments, and further having the following characteristics. 1.5 ≦ U% ≦ 15 (1) 8 ≦ ΔSW (%) ≦ 80 (2) where U% is a worcester spot and ΔSW Indicates boiling water shrinkage. 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.
The mixed fiber composite yarn according to the above. 3. The mixed fiber composite yarn according to claim 1, wherein the cross-sectional shape having the concave portion has a degree of globalness of 5 or more and 60 or less. 4. A polyester multifilament yarn in which at least one kind of single filament obtained by melt spinning of a polyester polymer has a cross-sectional shape without a concave portion, and other single filaments have a single filament cross-sectional shape with a concave portion. A method for producing a mixed-fiber composite yarn, characterized in that the unstretched polyester yarn obtained by bundling and drawing the mixed fiber before drawing is heated and drawn at a draw ratio of the following formula. 0.70 × NDR ≦ R ≦ 0.98 × NDR (3) where NDR is a natural stretching ratio of the polyester undrawn yarn,
R indicates the magnification. 5. The method for producing a mixed fiber composite yarn according to claim 4, wherein after the heating and stretching, a confounding treatment is performed at a confounding rate of 10 pieces / m or more. 6. After heating and stretching, then at 80 ° C. or higher
Method for producing a combined filament composite yarn according to claim 4, wherein the performing fixed length or slack slow heat treatment at 80 ° C. or less. 7. After performing fixed length or slack gentle heat treatment method for producing a combined filament composite yarn of claim 6, wherein the performing interlacing tens / m or more entangling process. 8. consists no hole shape at least one discharge hole recess consists hole shape having a concave portion other discharge hole of formed by a discharge hole of two or more different shapes, and 1 From the spinneret discharged from the same side of the sheet,
8. The method according to claim 4, wherein the polyester polymer is melt spun. 9. A polyester multifilament yarn formed by dispersing and blending two or more types of single filaments having different cross-sectional shapes, wherein at least one type of single filament has a cross-sectional shape having no concave portion. At least one kind of a single filament having a cross-sectional shape having no concave portion, and at least one kind of a single filament having a cross-sectional shape having no concave portion, was in contact with the single filament having a cross section having a concave portion. mixed fiber having a thick and thin yarn portion Ru sectional shape der forming the gaps between those of the single filament cross section in the case
The composite yarn has the following properties: 1.5 ≦ U% ≦ 158 8 ≦ ΔSW ≦ 80 Furthermore, the twist coefficient α in the following equation is 2400 or more and 220
A knitted fabric characterized by comprising a mixed fiber composite yarn twisted in the range of 00 or less used as a warp and / or a weft. T = α ・ D ^-1/2 10. The knitted fabric according to claim 9, wherein a 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.