JPH0790738A - Blended composite yarns and production thereof - Google Patents

Abstract

PURPOSE:To obtain composite blended yarns and a fabric having moderate tension and KOSHI (physical properties such as bending strength, compressive hardness, instantaneous resilience, etc., of the fabric), showing moire-like color tone, having swelling and excellent handle and drape, appearance and touch feeling like natural fibers, especially like wool. CONSTITUTION:Denier mixed multifilaments (A) having latent and slight crimp tendency consisting of thin denier polyester filaments (a) having thick and thin evenness of mainly <=5mm thick part length and thick denier polyester filaments (b) having thick and thin evenness of mainly <=1mm thick part length are used as sheath yarns and polyester multifilaments (B) having 3-8d monofilament denier as core yarns to make composite blended yarns having >=5% length difference between the sheath yarns (A) and the core yarns (B). The composite blended yarns has >=3 grades of shades or hues within maximum 1cm at a point along the length of the yarns when dyed with a disperse dye and/or a cationic dye. A production thereof, a fabric consisting of the composite blended yarns and an alkali treated fuzz product of the composite blended yarns or of the fabric are claimed in this invention.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a natural fiber, particularly a polyester-based composite mixed yarn having a bulge like wool and moderate tension and having a natural and good texture and color tone and having a high bulkiness. And a fabric made of the same.

[0002]

2. Description of the Related Art Polyester multifilament yarn is characterized by high uniformity, but when it is turned upside down, it does not change much as it is and has an artificial coldness. It tends to be inferior.
On the other hand, as a method for imparting bulkiness to a polyester multifilament yarn, a false twisting method, an indentation crimping method, a knit denit method and the like are well known. It is difficult to give natural and good bulkiness and bulge.

Therefore, the above-mentioned drawbacks of the polyester multifilament yarns are improved so that the polyester multifilament yarns can have a spun yarn-like appearance and texture to make a marbling woven or knitted fabric. Or
It has been attempted in the past to impart bulkiness and a feeling of sharpness. As such a conventional technique, an unstretched portion (thick portion) and a stretched portion in the length direction are formed in each filament constituting the polyester multifilament yarn. Part (details),
A filament yarn in which the unstretched portion and the stretched portion are dispersed and made to exist (Japanese Patent Publication No. 51-7207, JP-A-Sho 6).
1-138732), the average particle size is 0.9 to
Unstretched multifilament yarn in which inorganic particles of 1.8μ are uniformly dispersed in a proportion of 0.5 to 2.5% by weight (Japanese Unexamined Patent Publication No. 59-94617), and has concave portions A non-uniformly drawn polyester multifilament yarn composed of filaments of irregular cross section (Japanese Patent Laid-Open No. 4-91219) is known.

However, the above-mentioned conventional polyester multifilament yarns are superior in bulkiness, texture, appearance, etc. to the polyester multifilament yarn not subjected to such processing, but have a feeling. , The appearance and feel are still monotonous, and on the contrary, they are extremely changeable, so they are not sufficiently satisfactory, and they are natural and changeable or bulky like natural fibers such as wool and cotton. Good texture, appearance,
It does not have a feeling of touch, color tone, etc., and lacks firmness.

Further, it has been attempted to impart various color tones to the polyester multifilament yarn, and as such a conventional technique, a polyester filament having a disperse dye-like thick spot and a cationic dye-dyeable dye are used. Of composite filaments with polyester filaments with thick and fine irregularities, and highly oriented polyester undrawn yarn that is non-staining to ionic dyes and ionic dyes that have low birefringence A method for producing a multicolored polyester textured yarn having thick and thin spots and different phases by subjecting a mixed yarn with a highly oriented polyester undrawn yarn to a relaxation heat treatment, followed by cold drawing and false twisting (JP-A-63- No. 35843) is proposed.

[0006] However, the above-mentioned yarns are capable of performing a heterogeneous expression of different hues, but at most two-color expression does not result in a hue of three or more colors, and the heterogeneous expression has a very long cycle and is regular. Therefore, it lacks in naturalness and luxury. Further, in the case of the processed yarn obtained by the above method, multicolor expression is possible, but the arrangement of the cationic dye dyeing part and the disperse dye dyeing part is caused by the long period of the thick and thin spots in the filaments forming the yarn. And the distribution state is simple, not distributed finely and randomly,
There is a drawback that the dyed fabric remains unnatural and does not give a high-quality dyed product. Further, in this method, since crimp is imparted to the yarn by false twist, the crimped state is monotonous and excessive, the yarn cannot be given a fuzzy high-class feeling, and moreover, the yarn is heat rubbed on the false twist heater. Therefore, there is a drawback that the dry feeling peculiar to the thick and thin fluffy yarn is impaired and a slimy feeling is generated.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a natural multi-filament, particularly a polyester multifilament having a wool-like natural and good texture, appearance, touch, color tone, etc. To provide a yarn based on and a fabric formed thereof. Further, an object of the present invention is to provide a multi-stage dyeing density (shading of color) when dyed, or a multitone hue expression of 3 or more colors is possible.
The heather expression is neither too strong nor too weak, and is finely and randomly distributed throughout the whole in an extremely short period, giving a natural and deep color tone and appearance, and a natural wool-like bulge. And a fabric made of the same, which has an excellent feeling and has a proper elasticity. An object of the present invention is to provide a polyester yarn and a fabric which have a large number of fine fluffs like spun yarns and which have the above-mentioned excellent properties in terms of strength and texture. Is.

[0008]

Means for Solving the Problems The present inventors have made extensive studies to solve the above problems. As a result, a denier mix thick polyester polyester multi-filament yarn is formed from a thick denier polyester filament having a specific thick spot and a fine denier polyester filament having a specific thick spot, and this yarn is formed into a specific single fiber denier. When the heat-shrinkable polyester multi-filament yarn is contracted by fluid-entangled with the heat-shrinkable polyester multi-filament yarn, the denier mix thick and thin polyester multi-filament yarn is located almost outside of the yarn and has high shrinkage. It is possible to obtain a composite mixed yarn in which the multi-filament polyester multifilament yarn is located almost in the center of the yarn, and this composite mixed yarn has a wool-like swelling and moderate tension, and it is a fine and random thick and thin yarn. Multi-level stain density and lightness based on spots, multi-hue state, natural tone state What has been found that has an above-mentioned desired characteristics.

Further, in the above-mentioned composite mixed yarn, the present inventors set one of the fine denier polyester filament and the thick denier polyester filament constituting the side yarn as disperse dye dyeable and one as the cationic dye dyeable. Then, when dyed with a disperse dye and a cationic dye, 3
It has been found that a yarn and a fabric can be obtained in which a multi-tone heathered tone of a color or more is finely and randomly distributed and has an extremely excellent tone. Further, the present inventors have found that when the above-mentioned composite mixed fiber or a cloth made of the same is treated with an alkali, a thread or cloth similar to a spun thread having an extremely large number of fine fluffs can be obtained.

That is, according to the present invention, a fine denier polyester filament (a) having a thick fine portion having a thick portion of 5 mm or less in the longitudinal direction and a thick portion of 1 mm or less in the longitudinal direction are mainly used. A denier mixed polyester multifilament yarn (A) having a latent crimp property, which is composed of a thick denier polyester filament (b) having thick and thin spots, is used as a side yarn, and a polyester multifilament yarn having a single fiber denier of 3 to 8 denier ( A composite mixed yarn in which B) is a core yarn, and the yarn length difference between the side yarn and the core yarn is 5% or more, and when dyed with a disperse dye and / or a cationic dye, it is along the length direction of the yarn. In addition, the composite mixed yarn is characterized by having three or more levels of lightness or hue within a maximum length of 1 cm at any one point.

Further, according to the present invention, a fine denier polyester filament (a) having thick fine dots whose length is 5 mm or less and a thick part whose length is 1 mm or less are provided. Denier mix polyester multifilament yarn (A) having latent fine crimpability for side yarns, which is composed of thick denier polyester filaments (b) having fine spots, and heat shrinkability than the above yarns (A) for side yarns. Of a single filament denier having a large denier of 3 to 8 denier is supplied to a fluid processing device to mix and entangle the polyester multifilament yarn (B) to form a fabric, A method for producing a fabric, characterized in that the fabric is heat-treated.

According to the present invention, in the above-mentioned composite mixed yarn of the present invention, both the fine denier polyester filament (a) and the thick denier polyester filament (b) constituting the side yarn (A) are disperse dye dyeable. A composite mixed yarn; a fine denier polyester filament (a) and a thick denier polyester filament (b), one of which is disperse dye dyeable and the other of which is cationic dye dyeable; A composite mixed yarn in which at least the side yarn (A) constituting the composite yarn has a large number of fluffs; and a fabric made of the composite mixed yarn are included. In the present invention, the term “disperse dye dyeability” means that the dye is not dyed with a cationic dye and dyeable with a disperse dye.

The composite mixed yarn of the present invention comprises a side yarn (A) made of a denier mix polyester multifilament yarn (hereinafter referred to as a "denier mix thick and fine fluff yarn") having the above-mentioned specific thick and fine dots and the above-mentioned specific yarn. It is necessary that the core yarn (B) is made of the polyester multifilament yarn, and the contents of the side yarn (A) and the core yarn (B) that form the composite mixed yarn are described in detail below. You are right.

The side yarns (A) have fine denier polyester filaments (a) [henceforth "fine denier thick fine filaments (a)"] having thick fine varieties in the lengthwise direction and thick fine varieties in the lengthwise direction. A denier mixed thick filament yarn composed of the thick denier polyester filament (b) [hereinafter referred to as "thick denier thick filament yarn (b)"]. In that case, the average single fiber denier of the fine denier large fine filament filament (a) group is 1.5 d or less, preferably 0.5 to 1.5 d, and the average single filament of the large denier large fine filament filament (b) group is small. Fiber denier less than 4.0d,
It is preferably 2.5 to 4.0 d. In particular, when the difference between the average single fiber denier of the thick denier large fine filament filament (b) group and the average single fiber denier of the fine denier large fine filament filament (a) group is set to about 2.0 to 3.5 d, It is possible to add bulkiness and versatility to the side yarn (A),
Moreover, a large number of fluffs can be generated when treated with alkali, which is preferable. The ratio of the fine denier thick filament filament (a) to the thick denier thick filament filament (b) in one side yarn (A) is about 50 by weight.
It is preferable to set it to about 50 to 70:30 from the viewpoint of the variety of spots. Further, the total number of denier of one side yarn (A) is about 30 to 200 denier, and the number of total filaments is about 20 to 100 f. It is desirable from the point of view.

In the present invention, it is preferable that the length of the thick portion in the fine denier thick fine filament (a) is mainly 5 mm or less, and in that case, the total length of the adjacent thick portion and the detail is 10 cm or less. . In addition, the thick portion of the thick denier thick filament filament (b) is mainly 1 m.
It is preferably m or less, and in that case, the total length of the thick portion and the detail adjacent to each other is preferably 1 cm or less. The side yarn (A) used in the present invention is a fine denier thick filament filament (a).
Of the thick part in and the interval (cycle) at which the thick part appears
And the length of the thick portion in the thick denier thick filament filament (b) and the interval (cycle) at which the thick portion appears are made different from each other, whereby an arbitrary cross section of the side thread (A) is obtained. In, the thick portion and the detail can be mixed randomly and finely. At this time, in the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b), if the thick portion length and the total length of adjacent thick portions and details are randomly different within the above range. This is preferable because the fine and fine spots are more completely dispersed.

Here, the length of the thick portions of the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) according to the present invention means the boundary between the thick portion and the detail of each filament as shown in FIG. In the case where it is clear as shown in (a), the length indicated by L ₁ in (a) of FIG. 1 corresponds to this.
In addition, as shown in (b) of FIG. 1, when the diameter gradually changes from the thick portion to the detail and the boundary is not clear, the (b) of FIG.
As shown in, the midpoint C between the point A having the maximum diameter and the point B having the minimum diameter is taken, and the distance L ₁ between two points C-C sandwiching the point A is the length of the thick portion. To do. Further, in the present invention, the total length of the thick portion and the detail adjacent to each other in the thick filament filament means the total length of the length L ₁ of the thick portion and the length L _{2 of the} detail adjacent thereto.

In the side yarn (A) in the composite mixed yarn of the present invention, the yarn is not composed of a single denier filament,
A denier mixed filament yarn in which two kinds of filament groups having different average single fiber denier are combined, and each of the fine denier filament group and the thick denier filament group has a fine denier large fine filament filament (a) And the thick denier thick spot filaments (b) group, and the length and period of the thick details thereof are finely shifted and dispersed in both groups. As a result, the composite mixed yarn of the present invention in which such a side yarn (A) is mainly located outside the yarn is extremely diverse and rich in variation, as compared with the conventional filament yarns of the above-mentioned, It has a good texture and color tone with depth.

The side yarn (A) is 10% or less, preferably 10% or less, because the side yarn (A) is a denier mixed thick filament yarn with the fine denier thick filament yarn (a) and the thick denier thick filament yarn (b). It has a latent fine crimping property of 2 to 8%, and due to such characteristics, it imparts a natural bulkiness extremely similar to that of natural wool to the composite mixed yarn. The term “10% or less latently crimping property” in the side yarn (A) as used herein means that the original yarn does not have crimps, but crimps are developed by heat treatment, and it is determined by the following method. It means that the value of the crimpability K is 10% or less.

Method of measuring crimp K : 1 yarn [side yarn (A)]
Sampling 10,000 denier with a skein of 1 m per week. Next, the sample was immersed in hot water at 100 ° C under no load for 1
Hot water treatment for 0 minutes without stirring. After the treatment, it is taken out from hot water, dried by heating with hot air at 60 ° C. until the weight becomes the same as the initial weight, and after 5 minutes, a load of 5 g is applied to measure the length (L ₃ ) of the skein at this time. Then 1000 for this skein
A load of g is applied, the length of the skein after 30 seconds (L ₄ ) is measured, and the crimpability K (%) is calculated from the following mathematical formula 1.

[0020]

## EQU1 ## Crimpability K (%) = {L ₄ − (L ₃ / L ₄ )} × 100

The type of polyester used for the fine denier thick filament filaments (a) and the thick denier thick filament filaments (b) constituting the side yarns (A) may be disperse dye dyeable and / or cationic dye dyeable. It is not particularly limited as long as it is polyester, and any fiber-forming polyester can be used. For example, even when both the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) are formed from a disperse dye dyeable polyester, the fine denier thick spot filaments (a) and the thick denier thick filaments (a) Even if one of the filamentary filaments (b) is made of a disperse dye-dyeable polyester and the other is made of a cationic dye-dyeable polyester, or other than the disperse dye-dyeable or cationic dye-dyeable It may be formed from polyester.

When both the fine denier thick spot filaments (a) and the thick denier thick spot filaments (a) in the side yarn (A) are formed from polyester dyeable to the same kind of dye (for example, both are dispersed). In the case where the side yarn (A) is formed only from the dye-dyeable polyester, as shown in FIG. 2, within a range of 1 cm at the maximum with reference to an arbitrary point P along the length direction thereof. Within the range (distance) (L ₅ ) (L ₆ ) from the point P ′ or the point P ″, which is separated from the upstream side or the downstream side along the lengthwise direction, in the lightness (color The shade difference becomes a state in which there are various shade differences of three or more levels, and even if the point P is taken at any position of the side thread (A), the shade difference (brightness difference) of the three or more colors appears. You can finish it with a delicate color tone. Further, one of the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) in the side yarn (A) is formed from a disperse dye-dyeable polyester, and the other is formed from a cationic dye-dyeable dye. When formed from polyester, its side thread (A)
When the composite mixed yarn of the present invention or a cloth formed thereof is dyed with a disperse dye and a cationic dye,
In FIG. 2A, in FIG. 2, a point P ′ that is separated from the upstream side or the downstream side along the length direction within a range of at most 1 cm with reference to an arbitrary point P along the length direction, or Within the range (distance) (L ₅ ) (L ₆ ) from the point P ″, the side thread (A) is 3
It becomes a multi-hue state in which more than three colors are dyed, and even if the point P is taken at any position of the side yarn (A), the dyed state of three or more colors is exhibited.

In the above case, the fine denier thick spot filaments (a) are formed from a disperse dye-dyeable polyester, and the thick denier thick spotted filaments (b) are formed from a cationic dye-dyeable polyester. Alternatively, the fine denier thick spot filaments (a) may be formed from a polyester dyeable with a cationic dye, and the thick denier thick spot filaments (b) may be formed from a polyester dyeable with a disperse dye. In particular, if the fine denier thick spot filaments (a) are formed from a disperse dye dyeable polyester and the thick denier thick spot filaments (b) are formed from a cationic dye dyeable polyester, in the side yarn (A) The latent fine crimpability is improved, and it is more effective in imparting a wool-like natural bulge, which is preferable.

As described above, the type of polyester forming the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) constituting the side yarns (A) is disperse dye dyeable and / or Any fiber-forming polyester dyeable with a cationic dye can be used, but when one or both of the filaments are dyed with a disperse dye, the filament is a polyethylene terephthalate, polybutylene terephthalate, or ethylene terephthalate unit. And / or butylene terephthalate units are the main constituent units, and it is preferable to form them from a copolyester containing a small amount of other copolymerized units. In the case of using a copolyester, the other copolymerized units include aromatic carboxylic acid components such as isophthalic acid, phthalic acid and 2,6-naphthalene dicarboxylic acid, and fats such as oxalic acid, adipic acid, azelaic acid and sebacic acid. Group carboxylic acid component, polyfunctional carboxylic acid component such as trimellitic acid, pyromellitic acid, diethylene glycol,
It can be derived from a copolymerization component such as propylene glycol, butanediol or ethylene glycol, polyethylene glycol, glycerin, pentaerythritol.

When one or both of the fine denier thick filament filaments (a) and the thick denier thick filament filaments (b) constituting the side yarn (A) are formed from a cationic dye-dyeable polyester, It is preferable to use a copolyester having an isophthalic acid unit in which a sulfonate metal base is bonded to a benzene nucleus, that is, a sulfonate isophthalic acid unit as a copolymerized unit. In that case, a copolymerization ratio of the sulfonate isophthalic acid unit in the polyester is used. Is preferably 1 to 3 mol% because the processability during spinning, dyeability, and general physical properties are improved.

When a polyester dyeable with a cationic dye containing a sulfonate isophthalic acid unit is used, the main unit constituting the polyester is preferably an ethylene terephthalate unit, a butylene terephthalate unit, or a combination thereof. If necessary, a small amount of other copolymerized units may be contained together with those units. Other copolymerized units at that time include aromatic carboxylic acid components such as isophthalic acid, phthalic acid, and 2,6-naphthalene dicarboxylic acid, and aliphatic carboxylic acid components such as oxalic acid, adipic acid, azelaic acid, and sebacic acid. Examples thereof include units derived from polyfunctional carboxylic acid components such as trimellitic acid and pyromellitic acid, diethylene glycol, propylene glycol, butanediol or ethylene glycol, polyethylene glycol, glycerin, pentaerythritol and the like.

The production method of the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) constituting the side yarn (A) is not particularly limited, and each filament has the above-mentioned specific thick portion length. It may be manufactured by any method as long as it has In particular, in producing the fine denier thick spot filaments (a) having the above-mentioned specific fine spots, an average particle size of 1.
0 μm or less, preferably 0.02-0.8 μm barium sulfate, silica, calcium carbonate, magnesium oxide,
Fine denier thick filament filaments obtained by a method in which a polyester containing 2.5 to 10% by weight, preferably 3 to 9% by weight, of fine particles of alumina, titanium oxide, etc. is spun and unevenly stretched. (A) can be obtained very smoothly, which is desirable. On the other hand, the thick denier thick spot filaments (b) can be produced with or without such fine particles, and like the fine denier thick spot filaments (a), if the fine particles are used, Specific thorns can appear on the filament.

Next, in the composite mixed yarn of the present invention, the core yarn (B) has a single fiber denier of 3 to 8 denier and is mixed with the side yarn (A) to form a composite mixed yarn. Occasionally, a polyester multifilament yarn having a yarn length difference of 5% or more is used. When the monofilament denier of the core yarn (B) is less than 3 denier, it is difficult to impart tension to the obtained composite mixed yarn and fabric, while when it exceeds 8 denier, the blending property with the side yarn (A) is increased. And the processability during weaving and knitting is poor, and the texture of the resulting composite mixed yarn or cloth is reduced. Further, when the difference in yarn length between the core yarn (B) and the side yarn (A) in the composite mixed fiber is less than 5%, the composite mixed fiber lacks in bulkiness and lacks in bulge. Also,
In order to strengthen the mixed fiber / entanglement with the side yarn (A) and prevent the slippage and slippage between the core yarn (B) and the side yarn (A), the core yarn (B) is non-crimpable. Preferably there is.

The composite mixed yarn of the present invention comprises a denier mix thick fine fluff yarn for a side yarn, which comprises the fine denier thick fine fluff filament (a) and the thick denier thick fine fluff filament (b), and a single fiber denier. Of the polyester multifilament yarn for core yarn having a denier of 3 to 8 denier is fluid-processed, mixed and entangled, and then heat-treated to mainly shrink the yarn for core yarn to provide 5 between the side yarn and the core yarn. % Or more, the side yarn (A) is positioned almost outside the composite mixed yarn, and the core yarn (B)
Is located almost inside the composite mixed yarn. Therefore, as the yarn for the core yarn before the fluid entanglement and the heat treatment, the yarn length difference between the side yarn (A) and the side yarn (A) after the fluid entanglement / heat treatment is large and the heat shrinkability is large. It is necessary to use polyester multifilament yarn. Generally, at the stage before forming a composite mixed fiber (before performing fluid entanglement / heat treatment), the boiling water shrinkage ratio (W
The difference (WB-WA) between B) (%) and the boiling water shrinkage rate (WA) (%) of the side yarn is about 5% or more, preferably about 7 to 15
It is recommended that the side yarn and the core yarn be selected and combined so that the percentage becomes%.

The above-mentioned difference in heat shrinkage between the side yarn and the core yarn can be obtained by appropriately selecting the type of polyester constituting the filament, spinning conditions, drawing conditions and the like. . For example, when the yarn for the side yarn is formed from polyethylene terephthalate, when the yarn for the core yarn is produced from an ethylene terephthalate copolymer in which isophthalic acid is copolymerized, high shrinkability satisfying the above-described heat shrinkage rate is obtained. The yarn for the core yarn can be obtained. However, the yarn for the core yarn is not limited to this, and any polyester multifilament yarn that is fiber-forming and has a higher heat shrinkage rate than the yarn for the side yarn can be used.

Although not limited thereto, as the polyester filament yarn constituting the core yarn (B),
When a yarn made of thick fine filaments having 10 or more thick portions per 1 m is used, the mixed fiber entanglement with the yarn for the side yarn is dramatically improved, and the mixed fiber entanglement becomes uniform. Moreover, an extremely large entanglement strength can be obtained, which is desirable.

The total denier of the core yarn (B) in the composite mixed yarn is set to about 30 to 150 denier, and the total number of filaments is set to about 4 to 20 f. It is preferable in that it can give a proper and moderate elasticity. Furthermore, the ratio of the side yarn (A) to the core yarn (B) in one composite mixed yarn is about 1: 1 to 1: 5 by weight.
It is important to keep natural fibers, especially wool-like bulkiness, moderate tension, composite composite yarn and fabric with excellent appearance with fine and random multi-stage color difference, color tone, and texture. It is preferable in terms of obtaining.

In the composite mixed yarn of the present invention, the fine denier thick filament filament (a) and the thick denier thick filament filament (b) constituting the side yarn (A) on the surface and / or inside of the yarn, particularly on the surface. The main part is a closed loop, a closed curl, a chevron, an open loop, etc., and a large number of fluffs are finely present, and a core yarn (B) is mainly present inside the yarn, and a side yarn (A). Mixed entanglement occurs between the filaments of the core yarn (B), the filaments of the core yarn (B), the filaments of the side yarns (A), and the filaments of the core yarn (B), resulting in high bulkiness and appropriate elasticity. Threads are formed.

The above-mentioned bent portions and fluff existing on the surface and / or inside of the yarn, especially on the surface, are mainly the side yarn (A).
However, in some cases, even if a bent portion is formed by the filament forming the core yarn (B), a part of the filament of the side yarn (A) is further formed in the core portion. It may be mixed, or a part of the filament of the core yarn (B) may be mixed in the outer portion, and the core yarn (B) is located almost inside and almost outside when seen in the whole composite mixed yarn. It suffices that the side yarn (A) is located.

The composite mixed yarn of the present invention is a yarn for a side yarn comprising the above-mentioned fine denier large fine filament filament (a) and thick denier large fine filament filament (b) and single fiber denier of 3 to 8. A non-crimpable core yarn made of denier polyester filament with high heat shrinkability is supplied to a fluid processing device such as Taslan processing or interlacing processing to be mixed and entangled with each other, and then heat treated. It can be manufactured mainly by shrinking the yarn for the core yarn. At that time, the number of bent portions can be changed by changing the supply amount of the side thread and the core thread to the fluid processing device, the fluid pressure, etc.
The size, the number of entanglements between filaments, the entanglement strength, and the like can be appropriately changed and adjusted. Generally, the overfeed ratio of the side yarn is 0 to 2 with respect to the core yarn.
It is preferable to supply both of them to the fluid processing nozzle so as to be 0%, and at that time, it is desirable that the fluid pressure of the fluid to be supplied to the fluid processing nozzle is 1.5 kg / cm ² or more.

The term "overfeed rate" as used herein means that the supply speed of the side thread or core thread (the surface speed of the side roller or core thread supply roller) is V ₁ .
When the take-up speed (surface speed of the take-up roller) of the mixed fiber / entangled yarn discharged from the fluid processing nozzle is V ₂ , it is represented by the following mathematical formula 2.

[0037]

[Equation 2] Overfeed rate (%) = {(V ₁ −V ₂ ) / V
₂ } x 100

An air flow is preferably used in the fluid processing, but it is not limited thereto, and other gas such as nitrogen gas and carbon dioxide gas, or liquid in some cases may be used.
A conventionally known fluid processing nozzle can be used as the fluid processing apparatus, and the shape and structure thereof are not particularly limited. Further, depending on the conditions at the time of fluid disturbance in the fluid processing nozzle, a continuous mixed fiber entanglement or an intermittent mixed fiber entanglement is formed in the obtained composite fiber mixture, but any of these may be formed.

The heat treatment after the mixing and entanglement may be performed after the fluid treatment, after the yarn obtained by the fluid treatment is once wound and then again, or after the fabric is knitted or woven. However, it is preferable to carry out after knitting and weaving. The heat treatment may be any method as long as it does not significantly affect the physical properties of the side yarns and the core yarns and can primarily cause the core yarns to undergo thermal shrinkage, for example, hot water. Treatment, hot air treatment, etc. can be adopted.
The heat treatment temperature at that time is generally 80 to 80 in the case of hot water treatment.
In the case of 140 ° C. and dry heat treatment, it is preferably about 140 to 190 ° C. from the viewpoints of shrinkage of the core yarn, prevention of deterioration of physical properties of the yarn due to heating, and the like.

Further, in the present invention, the filament for the core yarn and the filament for the side yarn are circular in cross section; multilobal such as trilobal to octalobal, T-shaped, V-shaped, flattened,
It can have any cross-sectional shape such as a square shape, and optionally contains an antioxidant, a heat resistance improver, a fluorescent bleaching agent, a flame retardant, a matting agent, a coloring agent, inorganic fine particles, etc. May be.

The composite fiber mixture produced as described above can be distributed or sold directly as it is or as a cloth. When a fabric is produced from the composite mixed yarn of the present invention, it may be used alone or may be used in combination with other natural fibers or synthetic fibers. If necessary, the composite mixed yarn or cloth of the present invention may be subjected to an alkali treatment or an alkali treatment and a rubbing treatment to generate a large number of fluffs on the yarn or the cloth. The alkali treatment may be performed directly on the composite mixed fiber obtained above, or after forming a fabric such as a knitted fabric or a non-woven fabric from the composite mixed fiber.

Side yarn (A) constituting the composite mixed yarn of the present invention
In this case, the thick and thin spots exist very finely at random and out of phase between filaments, and the thick and thin boundary portions of each filament are easily eroded by alkali and fine In addition, when the composite mixed yarn of the present invention or the cloth made of the same is subjected to alkali weight reduction or alkali weight reduction and kneading treatment, the length of the nap is especially increased on the side yarn (A) side. It is possible to generate a minute number of fine fluffs having a diameter of 5 mm or less at a rate of 300 or more per 1 m of the yarn length, and this fluff and the above-mentioned closed loop shape, closed curl shape, chevron shape, open loop shape, etc. Combined with the above, good bulkiness and spun yarn-like feel are imparted to the yarn and the cloth. Moreover, since only the specific portion of the yarn and the cloth is not extremely corroded by the alkali, the phenomenon that the strength is not significantly reduced, the yarn is cut off at the specific portion, and the cloth is perforated does not occur.

On the other hand, the phase of the thick and thin spots is not shifted between the filaments forming the yarn, the thick and thin spots are aligned in the lateral direction of the yarn, and the period of the thick and thin spots is large. In a yarn and a fabric manufactured from such a yarn, only a specific portion of the yarn is eroded by alkali treatment, cutting of the yarn at that portion, perforation in the fabric, and the like, resulting in a significant deterioration in quality, Moreover, a large number of fine fluffs cannot be generated, and from this point also, the composite mixed yarn of the present invention and the fabric made thereof have excellent properties.

Alkali treatment for producing fluff on the composite mixed yarn or the cloth made of the same is carried out by a strong alkaline substance such as sodium hydroxide, potassium hydroxide and trisodium phosphate, sodium carbonate, sodium bicarbonate, silica. The treatment can be performed using a processing solution containing a weak alkaline substance such as sodium acid salt or sodium dihydrogen phosphate. The concentration of the alkaline substance in the treatment liquid may be appropriately adjusted according to the type of the alkaline substance, the content of the composite fiber mixture to be treated, the content of the cloth, etc. Usually, the temperature of the alkali treatment liquid is reduced to about 80 to 120 ° C to reduce the amount. It is preferable to carry out the treatment so that the rate is about 2 to 20% from the viewpoint of generation of fluff, maintenance of strength and texture. Also, but not limited to,
The rubbing treatment is preferably carried out by a usual washer-relaxation method or a high-temperature and high-pressure liquid stream relaxation method. The alkali treatment and the rubbing treatment can be performed before, during, or after dyeing the yarn or the fabric.

Then, before the composite fluffy yarn is produced with the fluff by the alkali treatment or after the fluff is produced, the yarn is about 1000 times / m or less, preferably 400 to
Twisting at 600 times / m is preferable because the filament can be prevented from coming off from the yarn and the fluff can be fixed. In addition, the alkali treatment may be performed at the same time as scouring and desizing of the cloth,
Alternatively, it may be performed before or after the treatment, and the number of treatment steps can be reduced when the treatment is performed simultaneously with the scouring and desizing. The alkali treatment may be performed in a static state, but if the alkali treatment liquid is made to collide with the yarn, the fabric, or the alkali treatment liquid or the composite fiber mixture to be treated or the fabric is stirred, the fluff will be cut off. It can be generated more quickly, and such alkali treatment can be carried out by using, for example, a high pressure liquid flow type device or a high pressure washer device.

When the alkali treatment is carried out in the presence of a nonionic surfactant, anionic surfactant or the like, swelling, softening of the composite mixed yarn, penetration of alkali into the fiber, etc. are promoted and the treatment is carried out. It can be carried out promptly, and at the same time, a good swelling feeling is imparted to the threads and the cloth as a whole, and the sizing agent and the like dropped from the threads and the cloth can be prevented from reattaching. Nonionic surfactants at that time include, for example, polyoxyethylene polyhydric alcohol alkyl esters, polyoxyethylene alkyl ethers, polyethylene glycol alkyl esters, and anionic surfactants such as soap and higher alcohols. Examples thereof include a surfactant.

Although not limited, examples of a preferable method for producing a yarn for a side yarn used in the composite mixed yarn of the present invention are as follows.

Example of manufacturing yarn for side yarns : (1) For example, spinning is performed using a spinning device having a split type spinneret whose number of holes and hole diameter are changed on the left and right as shown in FIG. The spinning speed at that time is 1500 to 2500 m.
/ Min is preferable, and 1800-2200 m / min is more preferable. If the spinning speed is less than 1500 m / min, the strength of the yarn or the fabric will be insufficient, while that of 2500
When it exceeds m / min, the occurrence of thick and thin spots after drawing becomes poor and it becomes difficult to obtain the target thick and thin spot yarn. Most of the conventional thick and thin yarns are 1500 m in order to generate thick and thin spots.
Although a spinning speed of not more than 1 / min was adopted, in the present invention, it is 15
By adopting a high spinning speed of 00 m / min or more, the target polyester thick and thin filament yarn can be obtained, and the productivity is high as compared with the prior art.

When the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) constituting the yarn for the side yarn are both made of, for example, disperse dye dyeable polyester, Fine particles having an average particle size of 1.0 μm or less, preferably 0.02 to 0.8 μm are 2.5
Disperse dye dyeable polyester containing 10 to 10% by weight, preferably 3 to 9% by weight, is spun from both the left and right spinning holes of the spinneret of FIG. 3 to form a fine denier filament group. A denier mix multifilament undrawn yarn in which a thick denier filament group is mixed may be manufactured.

On the other hand, one of the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) constituting the yarn for the side yarn is made of a disperse dye dyeable polyester, and the other is a cationic dye. When it is made of dyeable polyester, two liquids of disperse dye dyeable polyester and cationic dye dyeable polyester are supplied to the spinneret of FIG. 3 and spun through the spin holes on the left and right sides of the spinneret, respectively. Let's say, disperse dye dyeable fine denier filament group and cationic dye dyeable thick denier filament group,
Alternatively, a denier mix multifilament undrawn yarn in which fine denier filament groups dyeable with a cationic dye and thick denier filament groups dyeable with a disperse dye are mixed is produced.

In that case, as described above, 2.5 to 10% by weight, preferably 3 to 9% by weight of fine particles having an average particle size of 1.0 μm or less, preferably 0.02 to 0.8 μm.
Disperse dye dyeable polyester contained is spun from the die part with a large number of pores, and cationic dye dyeable polyester containing fine particles is spun from the die part with a small number of pores to disperse dye It is preferable to produce a denier mix multifilament unstretched yarn composed of a dyeable fine denier filament group and a cationic dye-dyeable thick denier filament group.

In addition, during spinning, the friction coefficient (so that the stretching points of the filaments are dispersed and dispersed during the stretching process described in (3) below (so that the dispersion stretching is performed)). In particular, it is desirable to use an oil agent having a low FF dynamic friction coefficient), and the amount of the oil agent applied at that time is preferably 0.8% by weight or more. If the amount of oil is less than 0.8% by weight,
The thick and thin cycles in each filament are likely to be long, and it becomes difficult to obtain a fluffy yarn in which thick and thin flecks are finely dispersed.

(2) Although the production efficiency is slightly inferior, the fine denier filament group and the thick denier filament group are separately spun and produced, instead of the direct spinning in the above (1), and the filaments are combined. A denier mix multifilament undrawn yarn may be produced by (mixing) fibers.

(3) Next, the denier mix multifilament unstretched yarn obtained in (1) or (2) above is preheated at a low temperature, stretched, and then heat set,
Manufacture denier mix thick and thin multifilament yarn for side yarns. This stretching treatment is preferably preheated at a temperature of about 35 to 55 ° C. When the preheating temperature is lower than 35 ° C, fluctuations in thick and thin spots due to the season tend to occur, while at 55 ° C.
When it exceeds, the period of thick and thin spots in each filament becomes long, and the stability of spots becomes insufficient. Further, the higher the heat setting temperature after drawing is, the more effective it is to reduce the elongation, but at the same time, the strength of the yarn is also decreased.
A temperature of about 40 ° C. is preferable from the viewpoint of balance between elongation and strength. In addition, the draw ratio is the following formula 3;

[0055]

## EQU00003 ## Stretching ratio = {(D / 100) +1} .times. (0.5-0.6) In the formula, it is preferable that D = the breaking elongation of the polyester multifilament yarn is satisfied.

On the other hand, the polyester multifilament yarn for the core yarn can be obtained, for example, by spinning and drawing a modified polyester polymer obtained by copolymerizing isophthalic acid by a conventional method, or a conventional polyester polymer can be obtained by a conventional method in a range of 2500-250. It can be produced by spinning at a spinning speed of 3500 m / min and then stretching. At that time,
In order to increase the heat shrinkage rate of the yarn for core yarn, it is desirable to perform the stretching treatment at a temperature of about 30 to 65 ° C and a draw ratio of 1.2 to 2.2 times. In addition, as described above, when the yarn for the core yarn is composed of the thick thin filaments having 10 or more thick portions per 1 m of the filament yarn length, the mixed fiber entanglement property with the yarn for the side yarn is significantly improved. Although a composite mixed yarn that is uniform and has a high entanglement strength can be obtained, in order to form such a thick portion in the filament for the core yarn, for example, a spinning speed of 2800 m /
Of the spun yarn obtained by spinning in
The temperature may be set to the following (for example, 45 ° C.) and stretched at a draw ratio of 2 times.

When the side yarns and the core yarns are fluid-processed and mixed and entangled, there is no limitation.
As described above, while the supply speed of the side yarns to the fluid processing device is set to an overfeed rate of 0 to about 20% with respect to the core yarns, the yarns of both yarns are set to 100 to 100%. 1
It is advisable to supply it to a Taslan nozzle, an interlace nozzle, etc. at a speed of 000 m / min, and to mix and entangle the fibers with a fluid pressure of 1 to 7 kg / cm ² to take them out. And
In the case of hot water, the mixed fiber / entangled yarn obtained above is about 80-1.
The side yarn (A) and the core yarn (B) are heat treated with hot water or hot air at a temperature of 40 ° C. and 140 to 190 ° C. in the case of dry heat.
The above-mentioned composite mixed yarn of the present invention having a yarn length difference of 5% or more is obtained.

The composite mixed yarn of the present invention can be made into various woven and knitted fabrics and nonwoven fabrics, and is particularly suitable for woven and knitted fabrics for clothing. The woven or knitted fabric produced from the composite mixed yarn of the present invention has natural fibers, particularly wool-like natural and good swelling feeling and touch, and also has moderate elasticity. Moreover, the shade (lightness) and hue of the color becomes multi-step when dyed, especially in the composite mixed yarn using the side yarn (A) which can be dyed with the disperse dye and the cationic dye, the disperse dye and the cationic dye. When dyed with, the dye is finely and randomly dyed in a multi-hue state of three or more colors, and the color tone has an extremely natural shade, and has a high-grade color tone, appearance and texture.

[0059]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. In the following examples, the average single fiber denier of the fine denier filament group and the thick denier filament group, the thick portion length of the thick fine filament filament, the boiling water shrinkage ratio of the side yarn and the core yarn, and the composite mixed yarn The difference between the yarn lengths of the side yarn (A) and the core yarn (B), the number of cut fluffs after the alkali treatment, and the confirmation of the number of shades or colors after dyeing were performed as follows.

Average single fiber denier of each filament group :
At least 100 m or more of each multifilament group was sampled, and the total denier was divided by the number of filaments to obtain the average single fiber denier.

Thick part length: 20 cm of the obtained thick thin filament yarn is sampled, and the filaments constituting the yarn are divided into a thick denier filament group and a fine denier filament group. A photomicrograph (100 to 500 times) of the thick denier filament is taken, and the length of the thick portion is measured from the photograph. The same applies to the fine denier filament. When the thick and thin spots in the filament are gradually transitioning from the thick portion to the fine portion or from the fine portion to the thick portion and there is no clear boundary, the midpoint is measured as the boundary as described in FIG.

Number of cut fluff : An arbitrary 10 cm was taken from the composite mixed yarn after alkali reduction treatment (in the case of a cloth, the yarn was unwound from the cloth), and the cut fluff was taken by a microscope photograph of 30 to 50 times. The number is read and this is repeated 10 times (n = 10) to obtain the average number of fluff. This average number of fluff is multiplied by 10 to obtain the number of fluff per 1 m.

Boiling water shrinkage of side yarn and core yarn
Rate : Performed according to JIS L 1013.

Of the side yarn (A) and the core yarn (B) in the composite mixed fiber yarn
Difference in yarn length : The yarn is treated with hot water at 100 ° C. for 10 minutes without load, and after drying, the core yarn and the side yarns are separated and each has a value of 0.
The length is measured by applying a load of 05 g / dr, and the yarn length difference is obtained.

Confirmation of the number of shades or the number of colors : The yarn was unwound from the dyed fabric, and a microscope color photograph (100 to 500) was used.
2 times), and visually determine the number of colors.

Example 1 (1) 8% by weight of barium sulfate having an average particle size of 0.6 μm
Using polyethylene terephthalate containing [η] = 0.65, the left and right sides of the split type die as shown in FIG. 3 (however, in Example 1, the die of 12 holes on the left side; the die of 36 holes on the right side are used) are used. From the spinning hole of 2: 3 (left side:
Spinning speed 1 at the same time with the discharge amount of the right side)
Spinning was performed under the conditions of 800 m / min and the amount of oil (thread-yarn dynamic friction coefficient 0.29) attached of 1.0% by weight, and 56d / 12f
Thick denier polyester filament group of 84d /
A polyester denier mix multifilament unstretched yarn (140d / 48f) in which a fine denier polyester filament group of 36f was combined was obtained.

(2) Next, after preheating the undrawn yarn obtained in (1) above at a hot roller temperature of 38 ° C., a draw ratio of 1.
It was drawn at 85 times, and was heat set at a hot roller temperature of 120 ° C. and wound to obtain a denier mixed polyester thick and fine stretched yarn for side yarn of 75% / 48f having an elongation of 65%. The average single fiber denier of the thick denier thick filament filament group is 2.
5d, the average single fiber denier of the fine denier thick filament filament group was 1.25d.

(3) Further, the length of the thick portion in the fine denier filament group in the denier mixed polyester thick thin uneven filament drawn yarn obtained in the above (2) is 100 μm to 3 mm.
The range was random. The length of the thick portion in the thick denier filament group was random in the range of 80 μm to 1 mm.

(4) Also, the denier mixed polyester thick and fine stretched yarn obtained in (2) above was knitted, dyed with a disperse dye, unwound, and then cut at 1 cm intervals to obtain 100 sample filament pieces. As a result of observing the cross section (for 1 m) with a microscope, it is confirmed that both the fine denier filament group and the thick denier filament group are thick and fine filament filaments in which thick portions and details are always mixed along the length direction. Was confirmed. (5) Further, the boiling water shrinkage rate (WA) of the denier mixed polyester thick and fine stretched yarn obtained in (2) above is 9.5%.
And the latent fine crimpability (crimpability K) was 6.5%. In the denier mixed polyester thick and fine stretched yarn obtained in the above (2), each filament was well dispersed, the number of crimps of each filament was 2 to 25 / inch, and the crimp shape was random. .

(6) On the other hand, 8 mol% of isophthalic acid
Spinning speed of a copolymerized [η] = 0.63 ethylene terephthalate copolymer from a spinneret having spinning holes with a single pore size 1
After spinning at 200 m / min to produce a polyester multifilament unstretched yarn, it is preheated at a hot roller temperature of 70 ° C. and then stretched at a stretch ratio of 3.6 times to obtain a hot roller temperature of 1
It was heat set at 50 ° C. and wound up to obtain a polyester multifilament drawn yarn for a core yarn of 75d / 16f. The boiling water shrinkage rate (WB) of this drawn yarn was 20%, and the difference in the boiling water shrinkage rate (WB) from the side yarn produced in (2) above (WB).
-WA) was 10.5% and had a high heat shrinkability.

(7) Next, the yarn for the side yarn obtained in (2) above and the yarn for the core yarn obtained in (6) above are processed with a Taslan processing nozzle (manufactured by Hebaline Co .; “Hemajet Type 31”).
1 ") at a yarn speed of 250 m / min and a side yarn overfeed rate of 3%, and the air pressure is 6 kg / cm ²
Taslan processing was performed under the conditions. (8) The textured Taslan yarn obtained in (7) above is immersed in boiling water at 100 ° C. for 10 minutes, heat-treated, and then taken out.
A composite mixed yarn was manufactured by drying at 0 ° C for 15 minutes. The yarn length difference between the side yarn (A) and the core yarn (B) in the obtained composite mixed yarn was measured and found to be 8%. Further, in this composite mixed yarn, a large number of closed loops, open loops, open end loops (fluffs) and the like were formed in the side yarn (A) portion, and thus it was rich in bulkiness.

(9) The composite mixed yarn obtained in (8) above is used for 2
Cylinder knitting with a 0 gauge knitting machine, thoroughly scouring, and then 1
It was put into a specified caustic soda solution and subjected to 10% weight reduction processing. When the state of the fluff was confirmed even after drying, a large number of fluff filaments having a nap length of about 5 mm or less were generated in the longitudinal direction, and the number was about 1100 / m.

(10) Further, the composite mixed yarn obtained in (8) above is subjected to S twist of 600 times / m to form a double yarn, and the warp yarn 8
A 3/2 twill fabric was woven with a density of 0 yarns / inch and weft yarns 76 yarns / inch to obtain a raw fabric. This greige was scoured and relaxed by a conventional method and then preset at 150 ° C.
Dyeing was performed in the following manner using a dyeing bath having the composition shown in.

[0074]

[Table 1] Composition of dyeing bath Dye : Kayalon Poly Navy Blue K-SF (Nippon Kayaku) (disperse dye) 3% owf Kayalon Poly Blue GE (Nippon Kayaku) (disperse dye) 0.5% owf Auxiliary : Toho Salt (Toho Kagaku) (Dispersant) 1 g / liter Acetic acid 0.3 ml / liter Bath ratio = 1: 30

The raw fabric was put into the above dyeing bath using a high temperature and high pressure rotary dyeing machine (manufactured by Texham Giken), and then 1.5
Increase the bath temperature to 40-110 ° C at a rate of
Dyeing was carried out for 20 minutes while maintaining 110 ° C., then the bath temperature was raised to 135 ° C. at a rate of 2 ° C./minute, and dyeing was carried out for 15 minutes while maintaining 135 ° C. Then the temperature of the dyeing bath is 30
It was cooled with the greige inside until it reached ℃, then taken out from the bath and washed with water for 30 minutes. After washing with water, reduction washing was carried out by an ordinary method, and after drying, final setting was performed at 160 ° C.
The density of the obtained fabric is 100 warps / inch, weft 75
Books / inch.

The dyed fabric obtained as above had a wool-like touch and a stretchy feel with a dry feel and a squeaky feel, and had a swelling texture. Also, when viewed at any one point along the length direction of the yarn, within a maximum range of 1 cm, the highly elastic core yarn (B) is the darkest, and then the side yarn (A) is a thick denier thick spot filament group. The thick part of is thick and the side thread (A)
The details of the fine denier thick spots in Example 2 were dyed at the thinnest, and at least three or more stages of shade difference could be visually confirmed. As a result, this dyed fabric had a fine, random, non-extreme, natural fine grain tone.

Example 2 (1) 8% by weight of barium sulfate having an average particle size of 0.6 μm
A cationic dye-dyeable ethylene terephthalate copolymer having a copolymerization ratio of 5-sodium sulfoisophthalic acid of 1.7 mol% [η] = 0.65 and barium sulfate having an average particle size of 0.6 μm are contained. Contains 8 wt% [η] =
A disperse dye dyeable polyethylene terephthalate of 0.65 was applied to a split type die as shown in FIG. 3 (12 holes on the left side;
From the left and right spinning holes (36 holes on the right side), the cationic dye-dyeable polyester is drawn from the left spinning hole (12 hole side) and the disperse dye-dyeable polyester from the right spinning hole (36 hole side) by 2: 3. At a spinning speed of 1800 m / min and an oil agent (yarn-yarn dynamic friction coefficient of 0.29) attached amount of 1.0% by weight. A polyester denier mix multifilament undrawn yarn in which a polymerized polyester filament group (cationic dye-dyeable polyester filament group) and a disperse dye-dyeable polyester filament group were combined was produced. Next, this undrawn yarn was drawn in the same manner as in (2) of Example 1 to obtain a 100d / 48d denier mixed polyester thick and fine uneven drawn yarn for side yarns.

(2) Thick denier filament group in the denier mixed polyester thick and fine stretched yarn obtained in (1) above (cationic dyeable thick and fine spot filament group)
The average single fiber denier of the average single fiber denier and the fine single denier filament group (disperse dye dyeable thick spot filament group) were 3.3d and 1.7d, respectively. The length of the thick portion in the fine denier filament group in the polyester thick spotted yarn was random in the range of 10 μm to 2 mm. The length of the thick part in the thick denier filament group was random in the range of 10 μm to 3 mm.
(The ratio of the thick part exceeding 400 μm is about 10%).

(3) In addition, the denier mixed polyester thick and fine stretched yarn obtained in the above (1) is tubularly knitted, dyed with a cationic dye, unwound, and cut at 1 cm intervals to obtain 10
As a result of observing the cross section of 0 sample filament pieces (1 m portion) with a microscope, it was found that both the thin denier filament group and the thick denier filament group had a thick portion and a detail that were always mixed along the length direction. It was confirmed that the filaments were fine filaments. (4) Furthermore, the value of latent fine crimpability (crimpability K) of the denier mixed polyester thick and fine stretched yarn obtained in (1) above was 6.0% as measured by the above-mentioned method,
The boiling water shrinkage rate (WA) was 11%. In the denier mixed polyester thick and fine stretched yarn obtained in the above (1), each filament was well dispersed, the number of crimps of each filament was 1 to 25 / inch, and the crimp shape was random. .

(5) On the other hand, in the same manner as in (6) of Example 1, a modified polyester copolymer having a copolymerization ratio of isophthalic acid of 8 mol% was drawn (30d / 6).
f) was produced. The boiling water shrinkage (WB) of this drawn yarn is 2
It was 1%, and the difference in boiling water shrinkage (WB-WA) with the yarn for side yarn produced in (1) above was 10%, indicating high heat shrinkability.

(6) Next, the yarn for the side yarn obtained in (1) above and the yarn for the core yarn obtained in (5) above were passed through an interlace nozzle (slit type; in-house) at a yarn speed of 400 m / min.
The yarns for side yarns were aligned and fed under the condition of an overfeed rate of 0%, and were interlaced under an air pressure of 2.5 kg / cm ² . (7) The interlaced yarn obtained in (6) above is used for 10
It was dipped in boiling water at 0 ° C. for 10 minutes, heat-treated, taken out, and dried at 60 ° C. for 15 minutes to produce a composite mixed yarn.
The yarn length difference between the side yarn (A) and the core yarn (B) in the obtained composite mixed fiber yarn was measured and found to be 9%. Further, in this composite mixed yarn, a large number of closed loops, open loops, open end loops (fluffs) and the like were formed in the side yarn (A) portion, and thus it was rich in bulkiness.

(8) 1 in the composite mixed yarn obtained in (6) above
S-twisting was performed at 000 times / m, and a flat double woven fabric was woven at a density of 150 warps / inch and 95 wefts / inch to obtain a raw fabric. After scouring and relaxing this greige by an ordinary method, it was alkali treated with a 20N caustic soda solution at a temperature of 10 ° C for 10% weight reduction processing, and after presetting at 150 ° C, the composition shown in Table 2 below was used. Using the dyeing bath,
Dyeing was performed in the same manner as in (10) of Example 1. Then, after washing with water, reduction washing was carried out by a conventional method and drying, and then final setting was performed at 160 ° C. The density of the obtained fabric is 15 warps.
The number was 0 / inch and the weft was 110 / inch.

[0083]

[Table 2] Composition of dyeing bath Dyeing : Dianix Poly Navy Blue RN-E (manufactured by Mitsubishi Kasei) (disperse dye) 3% owf Dianix Poly Navy Blue BG-FS (manufactured by Mitsubishi Kasei) (disperse dye) 1% owf Kayacryl Red B (Nippon Kayaku) (Cation dye) 2% owf Auxiliary agent : Toho Salt (manufactured by Toho Kagaku) (Dispersant) 1 g / liter Acetic acid 0.3 ml / liter Bath ratio = 1: 30

The dyed fabric obtained above had a wool-like touch with a dry feel and a squeaky feel, a firm waist, and a swelling texture. In addition, a mixed color of blue to magenta appears throughout the fabric, and when one yarn is unwound from the fabric and viewed at any one point along the length of the yarn, the maximum is 1c.
Within the range of m, the highly elastic core yarn (B) is dark blue, the side yarn (A)
The fine denier thick spot filament (dispersible dye dyeable filament) in three or more stages of dark blue to light blue, and the thick denier thick spot filament in the side yarn (A) (cationic dye dyeable filament) are thick It was dyed in red-purple to purple and had a complex hue consisting of 5 or more colors in total, and exhibited a complex and delicate high-grade color tone as if it were seen in wool top mix dyeing.

[0085]

EFFECTS OF THE INVENTION The composite mixed yarn of the present invention and the cloth made thereof have a fuzzy and deep tone color tone in which three or more shades of dark and light colors or three or more colors of hues are finely and randomly dispersed. It has a natural and deep color tone and appearance because its color heather expression is not too strong or too weak and is finely distributed throughout. In the composite mixed yarn of the present invention, a polyester multifilament yarn having a single fiber denier of 3 to 8 denier is used as a core yarn, and a fine denier thick fine spot filament group and a thick denier thick fine spot filament group are formed around the core yarn. The side yarns have a difference in length of 5% or more, and have a convex shape such as a closed loop shape, an open loop shape, or a fluff shape, and protrude outward, so that they have an appropriate tension and elasticity, and are excellent in bulkiness and bulge. It has a very good natural fiber, especially a wool-like texture and feel. Further, the yarn and the fabric of the present invention obtained by the alkali treatment have an extremely large number of fine fluffs in the yarn or the fabric as a whole, and thus have an appearance and characteristics more similar to those of the spun yarn and further It has an excellent appearance and texture with a similar high-class feeling. And the polyester thick yarn and cloth of the present invention can be easily manufactured with high productivity.

[Brief description of drawings]

FIG. 1 is a view illustrating the composite mixed yarn of the present invention, in which the fine denier thick spot filaments (a) and the thick denier thick spot filaments (b) constituting the side yarns (A) have the thick part and the length of the details and the adjacencies thereof. It is a figure which shows the measuring method of the total length of a thick part and a detail which fit.

FIG. 2 is a diagram showing how to check a dyed state in the composite mixed yarn of the present invention.

FIG. 3 is a diagram showing an example of a spinneret used for producing a denier-mic polyester multifilament yarn for side yarns used in the present invention.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location D01F 6/62 K 7199-3B F 7199-3B D02G 3/34

Claims (8)

[Claims] 1. The length of the thick portion in the length direction is mainly 5 mm.
A latent fine crimpability comprising a fine denier polyester filament (a) having the following thick and thin dots and a thick denier polyester filament (b) having the thick and thin dots having a thick portion mainly of 1 mm or less in the longitudinal direction The denier mixed polyester multifilament yarn (A) is used as a side yarn, the polyester multifilament yarn (B) having a single fiber denier of 3 to 8 denier is used as a core yarn, and the yarn length difference between the side yarn and the core yarn is 5% or more. A certain composite mixed yarn, when dyed with a disperse dye and / or a cationic dye, at three points or more in brightness or hue within a maximum length of 1 cm at any one point along the length direction of the yarn. A composite mixed yarn characterized by having: 2. The composite mixed yarn according to claim 1, wherein both the fine denier polyester filament (a) and the thick denier polyester filament (b) in the side yarn (A) are dyeable with a disperse dye. 3. The fine denier polyester filament (a) and the thick denier polyester filament (b) in the side yarn (A) are dye-dispersible and the other dye-cationizable. Composite mixed yarn. 4. The polyester filament in the polyester multifilament yarn constituting the core yarn (B) is a thick filament filament having 10 or more thick portions per 1 m of the yarn length. Composite mixed yarn. 5. A fabric comprising the composite mixed yarn according to any one of claims 1 to 4. 6. The composite mixed yarn according to any one of claims 1 to 4 or the cloth according to claim 5, wherein at least the side yarn (A) has many fluffs. 7. The length of the thick portion in the length direction is mainly 5 mm.
A latent fine yarn for side yarns, which comprises the following fine denier polyester filaments (a) having thick and fine dots and thick denier polyester filaments (b) having thick and fine dots with a thick portion mainly in the longitudinal direction of 1 mm or less. Denier mixed polyester multifilament yarn (A) having crimpability, and polyester multifilament yarn for core yarn having a monofilament denier having a heat shrinkage greater than that of the side yarn (A) is 3 to 8 denier. A method for producing a fabric, which comprises forming a fabric using a composite mixed fiber obtained by supplying (B) to a fluid processing device and mixing and entangled the fabric, and heat-treating the fabric. 8. The production method according to claim 7, wherein a large number of fluffs are generated on at least the side yarn (A) by performing an alkali treatment simultaneously with or after the heat treatment.