JP3088597B2 - Composite mixed yarn and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-bulky polyester composite mixed yarn having natural fibers, in particular wool-like swelling and moderate tension, having a natural and good feeling and color tone. And a fabric comprising the same.

[0002]

2. Description of the Related Art Polyester multifilament yarns are characterized by a high degree of uniformity, but when turned upside down, there is little change, and they have artificial coldness. They tend to be poorly matched.
On the other hand, as a method for imparting bulkiness to a polyester multifilament yarn, a false twisting method, an indented crimping method, a knit denitr method, and the like are well known. And it is difficult to impart natural and good bulkiness and swelling.

[0003] In view of the above, the above-mentioned drawbacks of the polyester multifilament yarn have been improved so that the polyester multifilament yarn can be given a spun yarn-like appearance and feeling to produce a marbled woven or knitted fabric. Or
Attempts have been made to impart bulkiness and crispness, for example. As such a conventional technique, an unstretched portion (thick portion) and an unstretched portion (thick portion) are stretched in the length direction of each filament constituting a polyester multifilament yarn. Part (details)
The unstretched portion and the stretched portion are dispersed and present in a filament yarn (Japanese Patent Publication No. Sho 51-7207,
1-113832), and the average particle size is 0.9 to 0.9.
Undrawn multifilament yarn in which 1.8 μm inorganic particles are uniformly dispersed at a ratio of 0.5 to 2.5% by weight (JP-A-59-94617), which has concave portions There is known a polyester multifilament yarn composed of irregularly shaped filaments which is drawn unevenly (Japanese Patent Laid-Open No. 4-91919).

[0004] However, the above-mentioned conventional polyester multifilament yarns are excellent in bulkiness, feeling, appearance and the like as compared with polyester multifilament yarns which have not been subjected to such processing, but the feeling is high. The appearance, touch, etc. are still unsatisfactory because they are still monotonous, or conversely, have extremely large changes.They are natural and change or bulky as in natural fibers such as wool and cotton. Good texture, appearance,
It has no tactile sensation, color tone, etc., and lacks tension.

It has also been attempted to impart various colors to polyester multifilament yarns. As such a conventional technique, polyester filaments having large and small spots disperse dyes and cationic dye dyes are used. Composite yarn obtained by blending polyester filaments with thick and thin spots, and dyeable to highly oriented polyester unstretched yarn that is insoluble in ionic dyes and ionic dyes with low birefringence A method of producing a multicolored polyester processed yarn having large 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 (Japanese Unexamined Patent Publication No. No. 35843) has been proposed.

[0006] However, although the above-mentioned yarn is capable of expressing heats having different hues, it is expressed in two colors at the most, not three or more hues, and the heat expression is extremely long and regular. Therefore, it lacks 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-stained portion and the disperse dye-stained portion is caused by the long period of the thick and thin spots in the filaments constituting the yarn. And the distribution state is simple, not finely and randomly distributed,
There is a disadvantage that unnaturalness remains in the dyed fabric and a high-quality dyed product is not obtained. Further, in this method, since the yarn is crimped by false twisting, the crimped state is monotonous and excessive, and the yarn cannot be given a fuzzy luxury feeling, and furthermore, it is thermally rubbed on a false twisting heater. For this reason, there is a disadvantage that the dry feeling peculiar to the thick and thin plaque is impaired and a slimy feeling is produced.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a natural fiber, particularly a polyester wool-like polyester multifilament having a natural, good feeling, appearance, touch, color tone, etc. and having a moderate tension. And a fabric comprising the same. Furthermore, an object of the present invention is that when dyeing, the dyeing density (color density) becomes multi-step, or a multi-hue expression of three or more colors is possible, and the heat expression is extremely strong. It is not too weak, and is distributed finely and randomly in a fuzzy manner in a very short period, and exhibits a natural and deep color tone and appearance,
In addition, it is an object of the present invention to provide a polyester yarn having a natural wool-like swelling, a moderate stiffness and an excellent feeling, and a cloth made of the same. An object of the present invention is to provide a polyester yarn and a cloth which have a large number of fine fluffs like a spun yarn as a whole and which have the above-mentioned excellent properties in terms of strength and hand. It is.

[0008]

Means for Solving the Problems The present inventors have repeatedly studied to solve the above problems. As a result, a denier mix thick multi-filament polyester multifilament yarn is formed from a thick denier polyester filament having a specific thick and fine spot and a fine denier polyester filament having a specific thick and thin spot, and this yarn is formed into a specific single fiber denier. When the heat-shrinkable polyester multifilament yarn is shrunk by fluid entanglement with the heat-shrinkable polyester multifilament yarn, the denier mix thick and thin spot polyester multifilament yarn is located almost on the outside of the yarn and has a high shrinkage. A composite mixed yarn in which the conductive polyester multifilament yarn is located almost at the center of the yarn is obtained, and this composite mixed yarn has a wool-like swelling and moderate tension, and is fine, random, and thin. Multi-level dyeing density and brightness based on spots, multi-hue state, natural heather state What has been found that has an above-mentioned desired characteristics.

Further, the inventors of the present invention have proposed that, in the above-described composite mixed yarn, one of the fine denier polyester filament and the thick denier polyester filament constituting the side yarn is dyeable with a disperse dye and one is dyeable with a cationic dye. Then, when dyed with a disperse dye and a cationic dye, 3
It has been found that yarns and fabrics that are extremely excellent in color tone, in which multi-colored heat colors more than colors are finely and randomly distributed, can be obtained. In addition, the present inventors have found that, when the above-described composite mixed yarn or a fabric comprising the same is subjected to an alkali treatment, a yarn or a fabric similar to a spun yarn having an extremely large number of fine cut fluffs can be obtained.

That is, the present invention relates to a thin denier polyester filament (a) having a thick spot with a thick portion mainly having a length of 5 mm or less in the length direction and a thick portion having a thickness of mainly 1 mm or less in the length direction. A denier-mixed polyester multifilament yarn having latent micro-crimpability (A) 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 monofilament denier of 3 to 8 deniers ( A composite mixed yarn having B) as a core yarn and a yarn length difference between the side yarn and the core yarn of 5% or more, and along a yarn length direction when dyed with a disperse dye and / or a cationic dye. Further, the composite mixed yarn has three or more levels of lightness or hue within a maximum length of 1 cm at any one point.

Further, the present invention relates to a thin denier polyester filament (a) having thick and thin spots whose thickness is mainly 5 mm or less in the length direction, and a thickness whose thickness is mainly 1 mm or less in the length direction. Denier mix polyester multifilament yarn (A) having latent micro-crimpability for side yarns composed of thick denier polyester filaments (b) having fine spots, and heat shrinkability more than the side yarns (A) A polyester multifilament yarn (B) for a core yarn having a large single fiber denier of 3 to 8 denier is supplied to a fluid processing device to be mixed and entangled to form a fabric using a composite mixed yarn obtained. A method for producing a fabric, comprising heat treating the fabric.

According to the present invention, both the fine denier polyester filament (a) and the thick denier polyester filament (b) constituting the side yarn (A) are dye-dispersible in the composite mixed yarn of the present invention. A composite mixed yarn; one of a fine denier polyester filament (a) and a thick denier polyester filament (b) is dyeable with a disperse dye and the other is dyeable with a cationic dye; Composite mixed yarns in which at least the constituent side yarns (A) have a large number of fluffs; and fabrics composed of these composite mixed yarns are included. In the present invention, the term “dispersible dye dyeability” means that the dye is immiscible with the cationic dye and is dyeable with the disperse dye.

The composite mixed yarn of the present invention comprises a side yarn (A) composed of a denier-mixed polyester multifilament yarn having the above-mentioned specific thick and thin spots (hereinafter referred to as "denier mix thick and thin spot yarn") and the above-mentioned specific yarn. It is necessary to be composed of a core yarn (B) composed of a polyester multifilament yarn of the above, and the contents of the side yarn (A) and the core yarn (B) constituting the composite mixed yarn are described in detail below. That's right.

The side yarn (A) is composed of a fine denier polyester filament (a) (hereinafter referred to as "fine denier thick fine filament (a)") having thick fine spots in the longitudinal direction and a thick fine spot in the longitudinal direction. It is a denier-mixed thick fine filament composed of thick denier polyester filament (b) [hereinafter referred to as “thick denier thick fine spot filament (b)” ”. At this time, the average single fiber denier of the group of fine denier and large fine filament (a) is 1.5d or less, preferably 0.5 to 1.5d, and the average single fiber of the large denier and large fine filament (b) group is large. Fiber denier is 4.0d or less,
Preferably, it is 2.5 to 4.0 d. In particular, when the difference between the average single fiber denier of the large denier large fine filament (b) group and the average single fiber denier of the fine denier large fine filament (a) group is set to about 2.0 to 3.5 d, Bulkiness and diversity can be imparted to the side yarn (A),
In addition, a large number of fluffs can be generated by the alkali treatment, which is preferable. Further, 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:
It is preferable to set it to about 50 to 70:30 from the viewpoint of, for example, the diversity of spots. Further, the total denier of one side yarn (A) should be about 30 to 200 denier, and the total number of filaments should be about 20 to 100 f. It is desirable from such points.

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

Here, the length of the thick portion of the fine denier thick filament filament (a) and the thick denier thick filament filament (b) in the present invention is such that the boundary between the thick portion and the detail in each filament is as shown in FIG. If as is clearly shown in (b) is a length indicated by L ₁ in the (i) Figure 1 corresponds to this.
Also, as shown in FIG. 1B, when the diameter gradually changes from a thick portion to a small portion and the boundary is not clear, FIG.
As shown in, taking the midpoint C between the point B with A and the minimum diameter point of maximum diameter, and length of the thick portion with a distance L ₁ between the two points C-C sandwiching the point A I do. Further, in the present invention, the total length of the thick portion and detail adjacent the FutoshiHoso plaques filaments means the total length of the length L ₂ of the detail adjacent thereto and the length L ₁ of the thick portion.

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 obtained by combining two types of filaments having different average monofilament deniers, and each of the fine denier filament group and the thick denier filament group has a fine denier and a fine spot filament whose diameter changes in the length direction (a) In addition to the group and the thick denier thick and fine spot filament (b) group, the length and cycle of the thick details are finely shifted and dispersed in both. 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 much more diverse and varied than the conventional filament yarns described above. It has a deep, good feel and color tone.

The side yarn (A) is 10% or less, preferably 10% or less, preferably a denier mixture of the fine denier thick filament filament (a) and the thick denier thick filament filament (b). It has a latent micro-crimpability of 2 to 8%, and imparts a natural bulkiness very close to natural wool to the composite mixed yarn by such properties. Here, the term “latent micro-crimpability of 10% or less” in the side yarn (A) means that the original yarn has no crimp, but the crimp develops by heat treatment, and is determined by the following method. It means that the value of the crimpability K is 10% or less.

Method for measuring crimpability K : Yarn [side yarn (A)] was 1
10,000 denier is collected in a skein of 1 m around. Next, this sample was immersed in hot water of 100 ° C. with no load to
Hot water treatment without stirring for 0 minutes. After the treatment, it is taken out from the hot water, heated and dried with hot air of 60 ° C. until the weight becomes the same as the initial weight, and after 5 minutes, a skein length (L ₃ ) is measured by applying a load of 5 g. Next, 1000
A load of g is applied, the skein length (L ₄ ) after 30 seconds is measured, and the crimpability K (%) is obtained from the following equation 1.

[0020]

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

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

In the case where both the fine denier large filament filament (a) and the large denier large filament filament (b) in the side yarn (A) are formed from a polyester dyeable to the same type of dye (for example, both are disperse dyes) In the case of forming from dyeable polyester only), the side yarn (A) is shown in FIG.
As shown in the figure, a point P ′ or a point P ″ separated upstream or downstream along the length direction within a maximum of 1 cm with respect to an arbitrary point P along the length direction. Within the range (distance) of (L ₅ ) and (L ₆ ), the lightness (shade difference of color) of the side thread (A) is in a state with three or more levels of various shade differences,
Regardless of the position of the point P in the side thread (A), a difference in shade (brightness difference) between the three or more colors is developed, and a fine color tone can be obtained. In addition, one of the fine denier thick filament fine filament (a) and the thick denier thick fine filament filament (b) in the side yarn (A) is formed from a disperse dye dyeable polyester, and the other is a cationic dye dyeable dye. When formed from polyester, when the composite mixed fiber yarn of the present invention using the side yarn (A) or a fabric comprising the same is dyed with a disperse dye and a cationic dye, the side yarn (A)
In FIG. 2, a point P ′ or a point P ′ separated from the arbitrary point P along the length direction by a distance of up to 1 cm along the length direction on the upstream or downstream side with respect to an arbitrary point P along the length direction. '
Within the range (distance) (L ₅ ) (L ₆ ), the side thread (A) is in a multi-hue state in which three or more colors are dyed, and the point P is taken at any position of the side thread (A). Also exhibit the three or more colors.

In the above case, the fine denier thick filament filament (a) is formed from a polyester dyeable with a disperse dye, and the thick denier thick filament filament (b) is formed from a polyester dyeable with a cationic dye. Alternatively, the fine denier large filament filament (a) may be formed from a polyester dyeable with a cationic dye, and the large denier large filament filament (b) may be formed from a polyester dyeable with a disperse dye. In particular, when the fine denier large filament filament (a) is formed from a polyester dyeable with a disperse dye and the large denier large filament filament (b) is formed from a polyester dyeable with a cationic dye, the side yarn (A) The latent crimpability is good, and it is more effective in imparting a natural wool-like swelling, and is preferable.

As described above, the type of the polyester forming the fine denier thick filament filament (a) constituting the side yarn (A) and the polyester forming the large denier thick filament filament (b) are disperse dye dyeability and / or Any fiber-forming polyester capable of dyeing a cationic dye can be used.However, when one or both of the filaments are dyeable with a disperse dye, the filament is made of polyethylene terephthalate, polybutylene terephthalate, or ethylene terephthalate unit. And / or a copolyester containing a butylene terephthalate unit as a main constituent unit and a small amount of another copolymerized unit. When a copolyester is used, the other copolymerized unit may be an aromatic carboxylic acid component such as isophthalic acid, phthalic acid, 2,6-naphthalene dicarboxylic acid, or a fatty acid such as oxalic acid, adipic acid, azelaic acid, or sebacic acid. Aromatic carboxylic acid component, trimellitic acid, polyfunctional carboxylic acid component such as pyromellitic acid, diethylene glycol,
It can be derived from copolymer components such as propylene glycol, butanediol or ethylene glycol, polyethylene glycol, glycerin, pentaerythritol.

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

When a cationic dyeable polyester 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 these units. Other copolymerized units at that time are isophthalic acid, phthalic acid, aromatic carboxylic acid components such as 2,6-naphthalene dicarboxylic acid, oxalic acid, adipic acid, azelaic acid, aliphatic carboxylic acid components such as sebacic acid, Examples include polyfunctional carboxylic acid components such as trimellitic acid and pyromellitic acid, and units derived from diethylene glycol, propylene glycol, butanediol or ethylene glycol, polyethylene glycol, glycerin, pentaerythritol, and the like.

The method for producing the fine denier thick filament filament (a) and the thick denier thick filament filament (b) constituting the side yarn (A) is not particularly limited. It may be manufactured by any method as long as it has a good quality. In particular, in producing the fine denier fibrillated fine filament (a) having the above-mentioned specific fibrillated spot, the average particle diameter is 1.
0 μm or less, preferably 0.02 to 0.8 μm barium sulfate, silica, calcium carbonate, magnesium oxide,
When a method of spinning using a polyester containing 2.5 to 10% by weight, preferably 3 to 9% by weight of fine particles such as alumina and titanium oxide and subjecting it to a spot drawing is adopted, the desired fine denier and thick spot filaments (A) can be obtained very smoothly, which is desirable. On the other hand, the thick denier thick filament filament (b) can be produced with or without such fine particles. Certain thick spots can appear in 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. Sometimes a polyester multifilament yarn having a yarn length difference of 5% or more is used. When the single fiber denier of the core yarn (B) is less than 3 denier, it is difficult to impart tension to the obtained composite mixed fiber and fabric, while when it exceeds 8 denier, the fiber mixing property with the side yarn (A) is increased. , The processability during knitting and weaving becomes poor, and the feeling of the obtained composite mixed yarn or fabric is reduced. Further, when the yarn length difference between the core yarn (B) and the side yarn (A) in the composite mixed yarn is less than 5%, the bulkiness of the composite mixed yarn is insufficient, and the composite yarn lacks swelling. Also,
The core yarn (B) must be non-crimped in order to strengthen the mixing and entanglement with the side yarn (A) and to prevent slippage and slippage between the core yarn (B) and the side yarn (A). Preferably, there is.

The composite mixed yarn of the present invention comprises a denier-mixed thick and thin plaque yarn for side yarn comprising the above-mentioned fine denier thick and thin spot filament (a) and a thick denier and thick and thin spot filament (b), and a single fiber denier. 3 to 8 denier polyester multifilament yarn for the core yarn is fluid-processed, mixed and entangled, and then heat-treated to mainly shrink the yarn for the core yarn so that 5 mm is formed 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 substantially inside the composite mixed yarn. Therefore, as the yarn for the core yarn before performing the fluid entanglement and heat treatment, the heat shrinkage is large enough to cause a yarn length difference of 5% or more with the side yarn (A) after the fluid entanglement / heat treatment. It is necessary to use polyester multifilament yarn. In general, at the stage before forming a composite mixed fiber (before performing fluid entanglement / heat treatment), the boiling water shrinkage rate (W
B) The difference (WB-WA) between (%) and the boiling water shrinkage (WA) (%) of the side yarn is about 5% or more, preferably about 7 to 15%.
%, It is preferable to select and combine the side yarn and the core yarn.

The difference in the heat shrinkage ratio between the side yarn and the core yarn as described above can be obtained by appropriately selecting the type of polyester constituting the filament, spinning conditions, stretching conditions, and the like. . For example, when the yarn for the side yarn is formed of polyethylene terephthalate, and the yarn for the core yarn is manufactured from an ethylene terephthalate copolymer obtained by copolymerizing isophthalic acid, high shrinkage that satisfies the above-described heat shrinkage condition 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 than the yarn for the side yarn can be used.

Further, although not limited, as the polyester filament yarn constituting the core yarn (B),
In the case of using a yarn composed of thick and thin spot filaments having 10 or more thick portions per meter, the intermingling property with the yarn for the side yarn is remarkably improved, and the intermingling with the mixed fiber becomes uniform. In addition, an extremely high confounding strength can be obtained, which is desirable.

It is preferable that the total denier of the core yarn (B) in the composite yarn is about 30 to 150 denier and the total number of filaments is about 4 to 20 f. This is preferable in that it can provide a moderate tension that is too small. Further, the ratio of the side yarn (A) and the core yarn (B) in one composite mixed yarn is about 1: 1 to 1: 5 by weight.
What to keep natural fibers, especially wool-like bulkiness, moderate tension, fine and random multi-level color tone difference appearance, color tone, texture, etc. It is preferable for obtaining.

In the composite mixed yarn of the present invention, fine denier filaments (a) and thick denier filaments (b) constituting side yarns (A) on the surface and / or inside, particularly on the surface of the yarn. There are a large number of fluffs and fine parts depending on the case, such as a closed loop, a closed curl, a chevron, an open loop, etc., and a core yarn (B) mainly exists inside the yarn, and a side yarn (A) Of the core yarn (B), between the filaments of the side yarn (A), and between the filaments of the core yarn (B), resulting in a high bulkiness and moderate tension. A thread is formed.

The above-mentioned bends and fluffs present on the surface and / or inside, particularly on the surface of the yarn are mainly formed by the side yarn (A)
Although the bent portion is formed by the filament constituting the core yarn (B) in some cases, a part of the filament of the side yarn (A) is further formed on the core portion. The core yarn (B) may be mixed in, or a part of the filament of the core yarn (B) may be mixed in the outer portion. What is necessary is just to have the structure in which the side thread (A) is located.

The composite blended yarn of the present invention has a side yarn consisting of the above-mentioned fine denier thick and thin spot filaments (a) and thick denier and thick thin spot filaments (b), and 3 to 8 single fiber denier. The heat-shrinkable non-crimp core yarn consisting of denier polyester filament is supplied to a fluid processing device such as Taslan processing and interlace processing to be mixed and entangled with each other. It can be produced mainly by shrinking the core yarn. At that time, by changing the supply amount of the side yarn and the core yarn to the fluid processing device, the fluid pressure, etc., the number of bent portions,
The dimensions, the number of entanglements between the filaments, the entanglement strength, and the like can be changed and adjusted as appropriate. Generally, the overfeed ratio of the side yarn to the core yarn is 0 to 2%.
It is preferable that both are supplied to the fluid processing nozzle so as to be 0%, and at this time, it is desirable that the fluid pressure of the fluid supplied to the fluid processing nozzle be 1.5 kg / cm ² or more.

The overfeed rate referred to here is defined as V _{1 where} the supply speed of the side yarn or the core yarn (the surface speed of the supply roller of the side yarn or the core yarn) is V ₁ .
Take-off speed of the combined filament-interlacing yarn discharged from the fluid processing nozzle (surface speed of the take-off roller) when the V _2, is represented by Equation 2 below.

[0037]

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

In the fluid processing, an air flow is preferably used, but not limited thereto, and another gas such as nitrogen gas or carbon dioxide gas, and in some cases, a liquid may be used.
As the fluid processing device, a conventionally known fluid processing nozzle can be used, and its shape and structure are not particularly limited. Further, depending on the conditions at the time of fluid agitation in the fluid processing nozzle, a continuous mixed entanglement or an intermittent mixed entanglement is formed in the obtained composite mixed yarn, but any of them may be used.

The heat treatment after the fiber mixing / entanglement may be carried out following the fluid treatment, may be carried out once after the yarn obtained by the fluid treatment has been wound, or may be carried out after forming the fabric after knitting and weaving. However, it is preferable to carry out after knitting. The heat treatment does not greatly affect the physical properties of the side yarn and the core yarn, and may be any method capable of mainly thermally shrinking the core yarn. Processing, hot air processing and the like can be adopted.
The heat treatment temperature at that time is generally 80 to 80 in the case of hot water treatment.
140 ° C. and about 140 to 190 ° C. in the case of dry heat treatment are preferred from the viewpoints of shrinkage of the core yarn, prevention of deterioration of the physical properties of the yarn due to heating, and the like.

In the present invention, the filament for the core yarn and the filament for the side yarn have a circular cross section; multilobal such as trilobal to octahedral, T-shaped, V-shaped, flat-shaped, and the like.
It can be any cross-sectional shape such as a rectangle, and may contain an antioxidant, a heat resistance improver, a fluorescent bleach, a flame retardant, a matting agent, a coloring agent, inorganic fine particles, etc. as necessary. You may.

The composite mixed yarn produced as described above can be distributed and sold directly as it is or as a fabric. When fabrics are produced from the composite mixed yarn of the present invention, they may be used alone or in combination with other natural fibers or synthetic fibers. Further, if necessary, the composite mixed yarn or fabric of the present invention may be subjected to an alkali treatment or an alkali treatment and a kneading treatment to generate a large number of fluffs on the yarn or the fabric. The alkali treatment may be performed directly on the composite mixed fiber obtained as described above, or may be performed after forming a fabric such as a woven fabric or a nonwoven fabric from the composite mixed fiber.

The side yarn (A) constituting the composite mixed yarn of the present invention
In the above, the thick and thin spots are present extremely randomly and randomly and out of phase between filaments as described above, and the thick and thin boundaries of each filament are easily eroded by alkali. When the composite mixed yarn of the present invention or a fabric comprising the same is rubbed with an alkali weight loss or an alkali weight loss, the length of the raised hair is particularly increased on the side yarn (A) side because the fluff is generated randomly and randomly. Can generate fine cut fluff of 5 mm or less in a very large number of 300 pieces or more per 1 m of yarn length, and the cut fluff and the bent portion such as the above-mentioned closed loop shape, closed curl shape, chevron shape, open loop shape, etc. In combination with the above, good bulkiness and spun yarn-like feeling are imparted to the yarn or fabric. Moreover, since only a specific portion of the yarn and the fabric is not extremely eroded by the alkali, phenomena such as a drastic decrease in strength, cutting of the yarn at the specific portion and perforation in the fabric do not occur.

On the other hand, the phase of the thick and fine spots is not shifted between the filaments constituting the yarn, the thick and thin spots are aligned in the horizontal direction of the yarn, and the cycle of the thick and thin spots is large. In yarns and fabrics made from such yarns, only a specific portion of the yarn is eroded by the alkali treatment, cutting of the yarn at that portion, perforation in the fabric, etc., resulting in a significant decrease in quality, Moreover, a large number of fine fluffs cannot be generated, and from this point of view, the composite mixed yarn of the present invention and the fabric comprising the same have excellent properties.

The alkali treatment for generating fluff on the composite mixed yarn or the fabric comprising the same is carried out by using a strongly alkaline substance such as sodium hydroxide, potassium hydroxide or trisodium phosphate, sodium carbonate, sodium bicarbonate or silica. The treatment can be performed using a treatment liquid containing a weakly alkaline substance such as sodium acid and sodium dihydrogen phosphate. The concentration of the alkaline substance in the treatment liquid may be appropriately adjusted according to the kind of the alkaline substance, the content of the composite mixed fiber to be treated or the content of the cloth, and usually, the temperature of the alkaline treatment liquid is reduced to about 80 to 120 ° C. to reduce the weight. It is preferable to perform the treatment at a rate of about 2 to 20% from the viewpoints of generation of fluff, maintenance of strength and feeling, and the like. Also, although not limited,
The kneading treatment is preferably performed by a usual method of washer relaxation or a method of high-temperature and high-pressure liquid flow relaxation. The alkali treatment and the kneading treatment can be performed before, during, or after dyeing the yarn or fabric.

Then, before or after the fluff is generated by the alkali treatment on the composite mixed yarn, the yarn is subjected to about 1000 times / m or less, preferably 400 to 500 times / m.
Twisting at a rate of 600 turns / m is preferable because the filament can be prevented from coming off from the yarn and the fluff can be fixed. In addition, even if the alkali treatment is performed at the same time as the scouring of the cloth or the like,
Alternatively, it may be performed before or after that, and when performing simultaneously with scouring and desizing, the number of processing steps can be reduced. The alkali treatment may be performed in a static state.However, when the alkali treatment liquid is caused to collide with the yarn, the cloth, or the like, or when the alkali treatment liquid, the composite mixed fiber to be processed, the cloth, or the like is stirred, the cut fluff is reduced. It can be generated more quickly, and such an alkali treatment can be performed using, for example, a high-pressure liquid flow type apparatus or a high-pressure washer apparatus.

When the alkali treatment is performed in the presence of a nonionic surfactant, an anionic surfactant or the like, swelling and softening of the composite mixed yarn, penetration of alkali into the fiber, and the like are promoted, and the treatment is performed. It can be carried out promptly, and at the same time, a good swelling feeling is imparted to the entire yarn or fabric, and the adhesive agent or the like which has fallen off from the yarn or fabric can be prevented from reattaching. Examples of the nonionic surfactant include polyoxyethylene polyhydric alcohol alkyl esters, polyoxyethylene alkyl ethers, polyethylene glycol alkyl esters, and the like. Examples of the anionic surfactant include soap and higher alcohol-based surfactants. Surfactants and the like can be mentioned.

Although not limited, examples of preferred production methods of side yarns used in the composite mixed yarn of the present invention are as follows.

Production Example of Side Yarn : (1) Spinning is performed by using a spinning apparatus having a split type die with different numbers of holes and hole diameters on the left and right as shown in FIG. 3, for example. The spinning speed at that time is 1500 to 2500 m
/ Min, preferably 1800 to 2200 m / min. If the spinning speed is less than 1500 m / min, the strength of the yarn or fabric will be insufficient, while 2500
If it exceeds m / min, the occurrence of thick spots after stretching becomes poor, and it becomes difficult to obtain the desired thick spot threads. Many of the conventional thick and thin mottled yarns are 1500 m
/ Min or less, but in the present invention, a spinning speed of 15
By adopting a high spinning speed of 00 m / min or more, the desired polyester thick and thin mottled yarn can be obtained, and the productivity is higher than in the prior art.

In the case where the fine denier thick filament fine filament (a) and the thick denier thick fine filament filament (b) constituting the yarn for the side yarn are both formed of a polyester dyeable with a disperse dye, for example, Fine particles having an average particle size of 1.0 μm or less, preferably 0.02 to 0.8 μm
Using a disperse dye-dyeable polyester containing from 10 to 10% by weight, preferably from 3 to 9% by weight, it is spun from both the left and right spinning holes of the spinneret of FIG. What is necessary is just to produce a denier mix multifilament undrawn yarn in which a thick denier filament group is mixed.

On the other hand, one of the fine denier thick and fine spot filaments (a) and the thick denier thick and thin spot filaments (b) constituting the side yarn is made of a polyester dyeable with a disperse dye, and the other is a cationic dye. In the case of a dyeable polyester, two liquids of a disperse dye dyeable polyester and a cationic dye dyeable polyester are supplied to the spinneret of FIG. 3 and spun from the spinning holes on the left and right sides of the spinneret, respectively. And disperse dye dyeable fine denier filaments and cationic dye dyeable thick denier filaments,
Alternatively, a denier mix multifilament undrawn yarn in which fine denier filaments dyeable with a cationic dye and thick denier filaments dyeable with a disperse dye are mixed is produced.

In this 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.
The disperse dye-containing dyeable polyester contained therein is spun from a die having a large number of pores, and the cationic dye-dyeable polyester containing fine particles is spun from a die having a small number of pores as necessary. It is preferable to produce a denier-mixed multifilament undrawn yarn consisting of dyeable fine denier filaments and cationic dye-dyeable thick denier filaments.

In spinning, the coefficient of friction is adjusted so that the stretching points of the filaments are dispersed and dispersed (so that the dispersion stretching is performed) during the stretching process described in (3) below. 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 cycle of each filament is likely to be long, and it is difficult to obtain plaques in which thick and fine spots are finely dispersed.

(2) Although the production efficiency is somewhat inferior, instead of the direct spinning described in (1) above, a fine denier filament group and a thick denier filament group are separately spun to produce, and these filaments are combined. Alternatively, a denier mix multifilament undrawn yarn may be produced.

(3) Next, the denier-mixed multifilament undrawn yarn obtained in the above (1) or (2) is preheated at a low temperature, drawn, and then heat-set.
Manufactures denier mix thick and thin multifilament yarn for side yarn. In this stretching treatment, preheating is preferably performed at a temperature of about 35 to 55 ° C. When the preheating temperature is lower than 35 ° C, seasonal fluctuation of thick and thin spots easily occurs.
If it exceeds, the cycle of large and thin spots in each filament becomes long, and the stability of spots is lacking. The higher the heat setting temperature after stretching, the lower the elongation is, but at the same time, the strength of the yarn is reduced.
A temperature of about 40 ° C. is preferable from the viewpoint of the balance between elongation and strength. Further, the stretching ratio is represented by the following formula 3;

[0055]

Stretching ratio = {(D / 100) +1} × (0.5-0.6) In the formula, it is preferable to carry out the process so that D = elongation at break of polyester multifilament yarn.

On the other hand, the polyester multifilament yarn for the core yarn can be obtained by spinning and drawing a modified polyester polymer obtained by copolymerizing isophthalic acid by an ordinary method, or by using an ordinary polyester polymer by an ordinary method at 2500 to 2,500. 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 of the core yarn, it is desirable to perform the stretching treatment at a temperature of about 30 to 65 ° C. and a stretching ratio of 1.2 to 2.2 times. Further, as described above, if the yarn for the core yarn is composed of the thick and thin spot filaments having 10 or more thick portions per 1 m of the filament yarn length, the intermingling property with the yarn for the side yarn can be greatly improved. A composite mixed yarn having a uniform and high entanglement strength can be obtained. 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 at a draw temperature of Tg.
After that, the film may be stretched at a stretching magnification of 2 times (for example, 45 ° C.).

When the yarn for the side yarn and the yarn for the core yarn are fluid-processed to be mixed and entangled, there is no particular limitation.
As described above, while the supply speed of the side yarn to the fluid processing device is set to an overfeed rate of 0 to about 20% with respect to the core yarn, the yarns of both yarns are set to 100 to 100%. 1
It may be supplied to a Taslan nozzle, an interlace nozzle, or the like at a speed of 000 m / min, and may be mixed and entangled with a fluid pressure of 1 to 7 kg / cm ² to be drawn. And
When the mixed fiber / entangled yarn obtained above is hot water, it is about 80-1
The side yarn (A) and the core yarn (B) are subjected to a heat treatment with hot water or hot air at a temperature of 40 ° C. and a dry heat of 140 to 190 ° C.
The composite mixed yarn of the present invention described above having a yarn length difference of 5% or more from the above.

The composite yarn of the present invention can be made into various woven or knitted fabrics or nonwoven fabrics, and is particularly suitable for woven or knitted fabrics for clothing. The woven or knitted fabric produced from the composite mixed yarn of the present invention has a natural fiber, particularly a wool-like natural and good swelling feeling and touch, and has an appropriate tension. Moreover, when dyeing, the color shade (brightness) and hue become multi-step, and especially in the case of a composite mixed yarn using a side yarn (A) that can be dyed with a disperse dye and a cationic dye, the disperse dye and the cationic dye When dyed with, it is dyed in a fine and random multi-hue state of three or more colors, and the color tone becomes an extremely natural heather tone, and has a high-quality color tone, appearance and feeling.

[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 length of the thick part in the thick fine filament filament, the boiling water shrinkage of the side yarn and the core yarn, and the composite mixed yarn The measurement of the yarn length difference between the side yarn (A) and the core yarn (B), the number of cut fluff after 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 collected, and the total denier was divided by the number of filaments to obtain an average single fiber denier.

Thick length: The obtained thick and thin mottled yarn is collected 20 cm, and the filaments constituting the yarn are divided into a thick denier filament group and a fine denier filament group. A microphotograph (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 fine denier filaments. If the thick and thin spots in the filament gradually transition from the thick part to the fine part or from the fine part to the thick part and there is no clear boundary, the intermediate point is measured as the boundary as described in FIG.

Number of cut fluffs : An arbitrary 10 cm of the composite mixed yarn (in the case of fabric, unwound from the fabric) after alkali weight reduction treatment is sampled, and the fluff of the cut fluff is taken from a micrograph of 30 to 50 times magnification. The number is read, and this is repeated 10 times (n = 10) to obtain an average number of fluff. This average number of fluff is multiplied by 10 to obtain the number of fluff per m.

[0063]Boiling water shrinkage of side yarn and core yarn
rate: Performed according to JIS L1013.

The side yarn (A) and the core yarn (B) of the composite mixed yarn
Yarn length difference : The yarn is treated with hot water at 100 ° C. for 10 minutes without load, dried, and then the core yarn and the side yarn are separated to each other.
The length is measured by applying a load of 05 g / dr, and the yarn length difference is determined.

Confirmation of the number of shades or the number of colors : The yarn was unwound from the dyed cloth, and a microscope color photograph (100 to 500
X) 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 having a content of [η] = 0.65, the left and right sides of a split-type base as shown in FIG. 2: 3 (from left:
Spinning speed is 1
Spinning is performed under the conditions of 800 m / min and an adhesion amount of an oil agent (yarn-yarn dynamic friction coefficient of 0.29) of 1.0% by weight.
Thick denier polyester filament group, 84d /
A polyester denier mixed multifilament undrawn yarn (140d / 48f) in which a 36 denier fine denier polyester filament group was twisted was obtained.

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

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

(4) In addition, the denier mixed polyester thick and thin drawn yarn obtained in the above (2) is knitted in a tube, dyed with a disperse dye, unwound, cut at 1 cm intervals, and cut into 100 sample filament pieces. As a result of observing the cross section of the (1m portion) with a microscope, both the fine denier filament group and the thick denier filament group are thick and fine spot filaments in which the thick part and the detail are always mixed along the length direction. Was confirmed. (5) Furthermore, the boiling shrinkage (WA) of the denier-mixed polyester thick and thin drawn yarn obtained in the above (2) is 9.5%.
And the latent micro-crimpability (crimpability K) was 6.5%. In the denier mixed polyester thick and thin drawn yarn obtained in the above (2), each filament was well separated, the number of crimps of each filament was 2 to 25 / inch, and the crimped shape was random. .

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

(7) Next, the side yarn obtained in the above (2) and the core yarn obtained in the above (6) are combined with a Taslan processing nozzle (manufactured by Hebaline Co., Ltd .; Hemajet Type 31).
1)) at a yarn speed of 250 m / min and an overfeed rate of 3% for the side yarn, and an air pressure of 6 kg / cm ²
Under the following conditions. (8) The Taslan-processed yarn obtained in (7) is immersed in boiling water at 100 ° C. for 10 minutes, heat-treated, and taken out.
The mixture was dried at 0 ° 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 yarn was 8%. Further, in this composite mixed yarn, a large number of closed loops, open loops, open end loops (fuzz), and the like were formed in the side yarn (A) portion, and were rich in bulkiness.

(9) The composite mixed yarn obtained in the above (8) is
After knitting the tube with a 0 gauge knitting machine and thoroughly scouring,
It was thrown into a prescribed caustic soda solution and subjected to a 10% weight reduction process. When the state of the fluff was confirmed even after drying, a large number of cut fluff yarns having a nap length of about 5 mm or less were generated in the length direction, and the number was about 1100 pieces / m.

(10) Further, the composite mixed yarn obtained in the above (8) is subjected to S twisting at 600 times / m to form a twin yarn, and the warp 8
A woven fabric was obtained by weaving a 3/2 twill fabric at a density of 0 threads / inch and a weft of 76 threads / inch. The greige was scoured and relaxed by a conventional method, and then preset at 150 ° C.
Was dyed as follows using a dye bath having the composition shown in Table 1.

[0074]

[Table 1] Dyeing bath composition 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 Chemical) (Dispersant) 1 g / liter Acetic acid 0.3 ml / liter Bath ratio = 1: 30

After the green machine was put into the above-mentioned dyeing bath using a high-temperature and high-pressure rotary dyeing machine (manufactured by Texam Giken),
Increasing the bath temperature to 40-110 ° C at a rate of ° C / min;
Dyeing was performed for 20 minutes while maintaining 110 ° C., and then the bath temperature was increased to 135 ° C. at a rate of 2 ° C./min, and dyeing was performed for 15 minutes while maintaining 135 ° C. Then the temperature of the dyeing bath is 30
Then, the mixture was cooled with the greige into it until the temperature reached ℃, and then removed from the bath and washed with water for 30 minutes. After water washing, reduction washing and drying were carried out by a conventional method, and final setting was performed at 160 ° C.
The density of the obtained fabric is 100 warps / inch and the weft is 75
Book / inch.

The dyed fabric obtained above had a wool-like touch with a dry feeling and a squeaky feeling, a tight waist, and a swelling feeling. Also, when viewed at any one point along the length direction of the yarn, the high elastic core yarn (B) is the darkest within a maximum of 1 cm, and then the thick denier thick fine filament filament group in the side yarn (A) Thicker side thread (A)
, The detail of the fine denier thick spot group was most lightly stained, and at least three or more levels of difference in density could be visually confirmed. As a result, the dyed cloth exhibited a fine and random, non-extreme, natural fine heather.

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 of [η] = 0.65, in which the copolymerization ratio of 5-sodium sulfoisophthalic acid contained is 1.7 mol%, and barium sulfate having an average particle size of 0.6 μm, [Η] = 8% by weight
0.65 disperse dye-dyeable polyethylene terephthalate was added to a split die as shown in FIG.
From the left and right spinning holes (36 holes on the right), the cationic dye-dyeable polyester was 2: 3 from the left spinning hole (12-hole side) and the disperse dye-dyeable polyester from the right spinning hole (36-hole side). , And spun at a spinning speed of 1800 m / min and an adhesion amount of an oil agent (yarn-yarn kinetic friction coefficient of 0.29) of 1.0% by weight. A polyester denier mix multifilament undrawn yarn in which a polymerized polyester filament group (cation dye dyeable polyester filament group) and a disperse dye dyeable polyester filament group were twined was produced. Next, this undrawn yarn was drawn in the same manner as in (2) of Example 1 to obtain a 100d / 48d denier mix polyester thick spot drawn yarn for side yarn.

(2) Large denier filament group (cation dye dyeable large fine filament group) in the denier-mixed polyester large fine drawn yarn obtained in (1) above
The average single fiber denier and the average single fiber denier of the fine denier filament group (dispersible dye-dyeable large fine filament filament group) measured by the above method were 3.3d and 1.7d, respectively. The length of the thick part in the group of fine denier filaments in this polyester thick and thin spot drawn yarn was random in the range of 10 μm to 2 mm. The length of the thick portion in the thick denier filament group was random within the range of 10 μm to 3 mm.
(The ratio of thick parts exceeding 400 μm is about 10%).

(3) Further, the denier-mixed polyester thick and thin drawn yarn obtained in the above (1) is knitted in a tube, dyed with a cationic dye, unwound, cut at 1 cm intervals and cut into 10 cm.
As a result of observing the cross section of the zero sample filament piece (for 1 m) with a microscope, it was found that both the fine denier filament group and the thick denier filament group had a thick part and a fine part that were always mixed along the length direction. It was confirmed that the filament was a fine spot filament. (4) Further, when the value of the latent micro-crimpability (crimpability K) of the denier mixed polyester thick fine spot stretched yarn obtained in (1) above was measured by the method described above, it was 6.0%.
The boiling water shrinkage (WA) was 11%. In the denier mixed polyester thick and thin spot drawn yarn obtained in the above (1), each filament was well separated, the number of crimps of each filament was 1 to 25 / inch, and the crimped shape was random. .

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

(6) Next, the side yarn obtained in the above (1) and the core yarn obtained in the above (5) are passed through an interlace nozzle (slit type; manufactured by the company) at a yarn speed of 400 m / min.
The yarns for the side yarns were uniformly supplied under the condition of an overfeed rate of 0%, and were interlaced under the condition of air pressure of 2.5 kg / cm ² . (7) The interlaced yarn obtained in (6) above is
It was immersed 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 yarn was 9%. Further, in the composite mixed yarn, a large number of closed loops, open loops, open end loops (fuzz), and the like were formed in the side yarn (A) portion, and were rich in bulkiness.

(8) The composite mixed yarn obtained in the above (6) is added with 1
A woven fabric was obtained by applying an S twist of 000 turns / m and weaving a flat double woven fabric at a density of 150 warps / inch and 95 wefts / inch. After the scouring and relaxation of the greige fabric by a conventional method, the resultant was subjected to alkali treatment using a 20N caustic soda solution at a temperature of 10 ° C. to perform a 10% weight reduction process, and was preset at 150 ° C. Using a dye bath,
Dyeing was carried out in the same manner as in Example 1, (10). Next, after washing with water, reduction washing and drying by a conventional method, final setting was performed at 160 ° C. The density of the obtained dough is 15 warps.
0 / inch and weft 110 / inch.

[0083]

[Table 2] Dyeing bath composition Dye : Dianix Poly Navy Blue RN-E (Mitsubishi Kasei Kogyo) (disperse dye) 3% owf Dianix Poly Navy Blue BG-FS (Mitsubishi Kasei Kogyo) (disperse dye) 1% owf Kayacryl Red B (Nippon Kayaku) 2% owf auxiliary agent : Toho Salt (manufactured by Toho Chemical) (dispersant) 1 g / liter acetic acid 0.3 ml / liter Bath ratio = 1: 30

The dyed fabric obtained above had a wool-like touch having a dry feeling and a squeaky feeling, a tight waist, and a swelling feeling. In addition, a mixed color feeling of blue to reddish purple appears on the whole fabric. Further, when one yarn is unwound from the fabric and viewed at any one point along the length direction of the yarn, the maximum is 1c.
m, the high elastic core yarn (B) is dark blue, the side yarn (A)
The fine denier thick filaments (dispersible dye dyeable filaments) are dark blue to light blue in three or more stages, and the thick denier thick fine filaments (cation dye dyeable filaments) in the side yarn (A) are dark. It was dyed reddish purple to purple, had a complex hue composed of a total of 5 or more colors, and exhibited a complex and subtle high-grade color tone as if it were seen in wool top mix dyeing.

[0085]

The composite mixed yarn of the present invention and the fabric comprising the same have a fuzzy and deep heather color tone in which three or more shades or three or more multi-hues are finely and randomly dispersed. It has a natural, deep and luxurious color tone and appearance because its color representation is finely distributed throughout without being too strong or too weak. In the composite mixed yarn of the present invention, a polyester multifilament yarn having a monofilament denier of 3 to 8 deniers is used as a core yarn, and is composed of a fine denier thick and fine spot filament group and a thick denier thick and thin spot filament group around it. The side yarns are convex and fuzzy, such as closed loops and open loops, with a yarn length difference of 5% or more, and protrude outward, so that they have a moderate tension and are excellent in bulkiness and bulge. It has a very good natural fiber, especially a wool-like feel and feel. Further, the yarn and the fabric of the present invention obtained by the alkali treatment have an extremely large number of fine cut fluffs throughout the yarn or the fabric, and therefore have an appearance and characteristics more similar to spun yarn, and have a more It has an excellent appearance and feel with a similar high-class feel. And, the polyester thick and thin mottled yarn and fabric of the present invention can be easily produced with high productivity.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 In the composite mixed yarn of the present invention, the length and the length of the thick portion and the fine portion of the fine denier thick fine filament filament (a) and the thick denier thick fine filament filament (b) constituting the side yarn (A) It is a figure which shows the measuring method of the total length of a matching thick part and detail.

FIG. 2 is a view showing a method of examining a dyed state of the composite mixed yarn of the present invention.

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

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI D01F 6/62 303 D01F 6/62 303H 303K D02G 3/34 D02G 3/34 (56) References JP-A-2-80631 (JP, A) JP-A-55-137234 (JP, A) JP-A-61-19891, JP-A-5-279933 (JP, A) JP-A-61-138732 (JP, A) JP-A-59-94617 (JP, A) JP-A-4-91219 (JP, A) JP-B-51-7207 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D02G 3/04 D01D 5 / 20 D01F 6/62 301 D01F 6/62 302 D01F 6/62 303 D02G 3/34

Claims (8)

(57) [Claims] 1. The length of a thick portion is mainly 5 mm in a length direction.
The potential micro-crimpability of a thin denier polyester filament (a) having the following thick and fine spots and a thick denier polyester filament (b) having a thick and thin spot whose thickness is 1 mm or less in the length direction is mainly obtained. A denier mix polyester multifilament yarn (A) having a side yarn, a polyester multifilament yarn (B) having a monofilament denier of 3 to 8 deniers as a core yarn, and a yarn length difference between the side yarn and the core yarn of 5% or more. A certain mixed fiber yarn, when dyed with a disperse dye and / or a cationic dye, has three or more levels of brightness or hue within a maximum length of 1 cm at any one point along the length of the yarn. A composite mixed yarn comprising: 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 method of claim 1, wherein one of the fine denier polyester filament (a) and the thick denier polyester filament (b) in the side yarn (A) is dyeable with a disperse dye and the other is dyeable with a cationic dye. Composite mixed yarn. 4. The polyester multifilament yarn constituting the core yarn (B), wherein the polyester filament is a thick and thin spot filament having 10 or more thick portions per 1 m of 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 claim 1, wherein at least the side yarn (A) has a large number of fluffs, or the fabric according to claim 5. 7. The thickness of the thick portion is mainly 5 mm in the length direction.
A latent fine yarn for side yarns comprising a thin denier polyester filament (a) having the following thick and thin spots and a thick denier polyester filament (b) having a thick and thin spot having a thick portion in the length direction of 1 mm or less. Denier mixed polyester multifilament yarn (A) having crimpability, and polyester multifilament yarn for core yarn, wherein single fiber denier having higher heat shrinkability than side yarn (A) is 3 to 8 denier. A method for producing a fabric, comprising supplying a (B) to a fluid processing apparatus to form a fabric using a composite mixed yarn obtained by mixing and entanglement, and heat-treating the fabric. 8. The method according to claim 7, wherein an alkaline treatment is performed simultaneously with or after the heat treatment to generate a large number of fluffs on at least the side yarn (A).