JP3332118B2 - Polyester multifilament composite yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester multifilament composite yarn, and more particularly, to a polyester multifilament for a woven or knitted fabric having a soft, bulky and dry texture and a top-dyed wool-like heather-like or marbling-like appearance. The present invention relates to a filament composite yarn.

[0002]

2. Description of the Related Art Polyester multifilaments are used for clothing, living materials, and industrial materials, taking advantage of their excellent properties. BACKGROUND ART Composite yarns composed of a plurality of multifilaments having different heat shrinkage properties are mainly used for clothing, exhibit excellent texture such as bulkiness, and are widely used. However, when all of the composite yarns shrink due to heat, the difference in shrinkage rate possessed by the yarn cannot be sufficiently secured due to the binding force of the structure of the woven or knitted fabric, and the woven or knitted fabric becomes hard due to the shrinkage of the yarn. For this reason, various measures have been taken to reduce the basis weight and provide a shrinkage allowance. However, a filament having a large heat shrinkage is generally cured by heat treatment, and a satisfactory texture cannot be obtained.

[0003] On the other hand, composite yarns of filaments that elongate and shrink in response to heat treatment are also known. For example, Japanese Patent Application Laid-Open No. 60-28515 discloses a filament that spontaneously elongates and shrinks when heated. Composite polyester filaments are disclosed which provide a knitted fabric having a silky texture with excellent levelness consisting of the filaments. Certainly, the composite polyester filament has a remarkable improvement in softness and bulkiness as compared with the case where all the multifilaments constituting the composite yarn are shrunk by heat. Are polyester dye dyeable polyester filaments, the strength of which is not always sufficient, and the alkali weight loss rate is higher than that of ordinary polyethylene terephthalate, so that the use thereof may be limited. In addition, since all the filaments constituting the composite polyester filament are basic dye dyeable polyester filaments, the leveling property is very good,
Not suitable for obtaining heather or marbling appearance.

Accordingly, the present inventors have proposed Japanese Patent Application Laid-Open No. Hei 2-307931 as having a mild heather appearance. This publication relates to a composite yarn composed of a heat-elongating multifilament and a heat-shrinkable multifilament. By making a polymer component different between the heat-expanding multifilament and the heat-shrinking multifilament, the soft yarn is softened. It has both a natural texture and a heather appearance. However, in this publication, when dyeing a composite yarn, since only two colors can be given, when compared with wool spun from a top dyed in many colors, the color tone is poor in terms of color tone. There is. This is thought to be related to the fact that the composite yarn of the present invention substantially contains only two colors, whereas the wool top dyed product contains many colors. Further, in the composite yarn of this publication, there are cases where it is difficult to obtain a texture at the time of dyeing processing, depending on the type of the polymer component of the heat-shrinkable multifilament. For example, when the heat-extended polyester multifilament is made of a thermoplastic synthetic fiber (for example, polyamide or the like) that is substantially insoluble in alkali, the weight reduction by alkali treatment is not limited to only the heat-extended polyester multifilament, It is difficult to make a gap between the warp and the weft constituting the yarn. Therefore, it is difficult to finish bending and shearing of the fabric softly.

[0005]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and has a heather-like or frost-like appearance which is closer to top-dyed wool than conventional multifilament composite yarns and has a good degree of wearability. While having a soft, bulky and dry texture.

[0006]

The present invention has the following structure to solve the above-mentioned problems. 1. A polyester multifilament composite yarn comprising an interlaced mixed yarn comprising at least the following multifilaments (1) to (3): (1) The multifilament A is constituted by a filament having a dry heat shrinkage (SHD) of 160 ° C. of 0% or less. (2) The multifilament B is composed of a thick and thin filament. (3) The multifilament C is composed of a cationic dyeable polyester filament. 2. S of polyester filament with the largest SHD [%] and polyester filament with the smallest SHD [%]
2. The polyester multifilament composite yarn according to the above item 1, wherein the difference in HD [%] is not less than 5.0 [%]. 3. 3. The polyester multifilament composite yarn according to the first or second item, wherein the degree of entanglement is 5 [ke / m] or more and 100 [ke / m] or less. 4. 4. The polyester multifilament composite yarn according to any one of the first to third aspects, wherein at least one kind of the polyester multifilament constituting the composite yarn is a filament having a hollow cross section. 5. The polyester multifilament composite yarn according to any one of claims 1 to 4, wherein at least one kind of the polyester multifilament constituting the composite yarn is a filament containing kaolinite. 6. The thick and thin polyester multifilament present in the composite yarn is multifilament at the time of being composited, and the thick and thin polyester multifilament has a thick and thin spot of 15.0% or more. The polyester multifilament composite yarn according to any one of claims 1 to 5.

[0007] The composite yarn of the present invention necessarily contains a polyester dye dyeable polyester filament, a polyester filament component substantially immiscible with the cationic dye, and a thick and thin polyester filament component. is there. This is because the composite yarn has three or more color tones and gives a good heather or frosted appearance similar to top-dyed wool. The cationic dye-dyeable polyester filament referred to in the present invention is obtained by copolymerizing a filament having 80 mol% or more of alkylene terephthalate repeating units and a chemical affinity for a cationic dye such as a sulfonic acid metal base-containing carboxylic acid component. Polyester, which is dyed at a normal or high pressure using a cationic dye, has practically sufficient dyeing properties for use in clothing.

[0008] The polyester substantially immiscible with a cationic dye is a polyester containing no component having a chemical affinity for a cationic dye such as a carboxylic acid component containing a metal salt of a sulfonic acid. A polyester that does not have a clear dyeing property that is sufficient for use in clothing even though it is slightly contaminated with dyes, and that has sufficient dyeing properties for disperse dyes in ordinary or high-pressure dyeing for clothing. Say For example, polyethylene terephthalate, polybutylene terephthalate, polyethylene terephthalate obtained by copolymerizing an isophthalic acid component and the like correspond to this, and polyethylene terephthalate is optimally used.

The polyester of the thick and thin polyester filament may be either a cationic dye dyeable polyester or a polyester substantially immiscible with the cationic dye, or both. Thick and thin polyester filaments cause a difference in dyeing properties in the fiber axis direction due to the unevenness of the fiber structure in the fiber axis direction accompanying the thick and thin spots. The thick and thin polyester filament referred to in the present invention is defined as having an A value of 10.0 [%] or more by a measurement method described later, which is a means for evaluating large and thin spots. More preferably, it is 15.0% or more, and still more preferably 20.0% or more.
Those exceeding [%] are not preferable because the thick part is greatly deteriorated by heat and alkali treatment.

[0010] The composite yarn of the present invention comprises a filament dyed with a cationic dye, a filament dyed only with a disperse dye, and a filament having a spot dyed with a cationic dye or a disperse dye in the fiber axis direction or with both. Is included so that at least three or more types of colors can be provided.

[0011] The composite yarn of the present invention has 16
It is preferred that both a filament having a dry heat shrinkage SHD of 0% or less and a filament exceeding 0% exist at 0 ° C. Due to the presence of filaments having SHD of 0% or less, a large difference in yarn speed is imparted by heat at the time of dyeing processing compared to conventional hetero-shrinkage mixed fiber yarns even under the restraining force of the structure of the woven or knitted fabric. And a clear improvement in softness and bulky feeling is recognized as compared with the conventional different shrinkage mixed fiber. The SHD of the filament having an SHD of 0% or less is preferably -2.0 [%] or less, more preferably -4.0 [%].
[%] Or less. However, if it is too small, pilling defects and the like are likely to occur, so it is preferable to keep it at about -15 [%].

When the SHD of all the filaments constituting the composite yarn is 0% or less, it is difficult to achieve a sufficient yarn foot difference, and the feeling of tightness may be lacking. It is also important that there is a filament having an SHD exceeding 0%. The SHD of the filament having the largest SHD constituting the composite yarn of the present invention is preferably 5.0% or more, more preferably 10.0% or more, but exceeds 70.0%. Since it becomes difficult to handle during dyeing, it is preferable to keep the amount to about 70.0 [%] or less.

The SHD constituting the composite yarn of the present invention
Is the maximum (always SHD> 0 [%]) filament and SH
The difference when D is the minimum (always SHD ≦ 0 [%]) is 5.0 [%]
The above is preferable for giving a soft feeling and a swelling feeling. More preferably, it is 12.0 [%] or more. However, in consideration of handling properties and consumption performance during dyeing, it should be kept at 85.0% or less.

The relationship between the type of dyeing properties of the polyester filament (the dyeing property of the cationic dye) and the magnitude of SHD is not particularly limited. Therefore, the composite yarn of the present invention includes various composite yarns depending on the combination. For example, (1) a composite yarn composed of a polyester filament substantially instable to a cationic dye having an SHD of 0% or less and a cationic and dyeable thick and thin polyester filament having a SHD exceeding 0%. (2) a combination yarn of a thick and thin polyester filament immiscible with a cationic dye having an SHD of 0% or less and a polyester dye dyeable with a cationic dye having an SHD exceeding 0%; ) SH
(4) SHD is a combination yarn of a cationic dye-dyeable polyester filament having a D of 0% or less and a thick and thin polyester filament substantially non-stainable with a cationic dye having an SHD exceeding 0%. Examples of the composite yarn include a combination of a cationic dye dyeable thick and thin polyester filament of 0% or less and a polyester filament substantially non-stainable with a cationic dye having a SHD of more than 0%.

[0015] These composites need to be subjected to a fluid entanglement treatment.
It is not preferable because the post-process properties such as knitting and weaving properties are not good and pilling defects are likely to occur.

The degree of entanglement by the fluid entanglement treatment is preferably 5 [ke / m] or more and 100 [ke / m] or less according to a measuring method described later. When it is less than 5 [ke / m], it is difficult to obtain the effect of the fluid entanglement treatment, and 100 [ke / m]
If it exceeds, the texture is hardened, which is not preferable. More preferably, 20 [ke / m] or more and 80 [ke / m
m] or less.

The polyester multifilament composite yarn of the present invention is a composite yarn composed of two or more kinds of polyester multifilaments, and the total denier of the composite yarn is 30.
In the case of woven or knitted fabrics of medium-thickness, particularly in the range of about denier to about 400 denier, a top-dyed wool-like appearance quality is effective. In that case, however, the thickness tends to be unfavorable even if desired.

The cross section of the filaments constituting the polyester multifilament composite yarn of the present invention may be any of ordinary round cross section, multi-leaf cross section, polygonal cross section, flat cross section, and any other special cross section. Although possible, it is preferable to apply a hollow cross section to achieve both thickness and lightness of the woven or knitted fabric. In this case, at least one of the polyester multifilaments constituting the composite yarn may be formed of a filament having a hollow cross section. The hollow ratio of the hollow cross section is preferably such that the cross sectional area of the hollow portion with respect to the entire cross sectional area is 3.0% or more and 60% or less. If it is less than 3.0 [%], it is difficult to feel lightness, and there is not much difference from a solid cross section. If it exceeds 60 [%], fluff due to rupture of the hollow portion in the subsequent process is likely to occur, and the handleability is poor. Any shape can be applied to the shape of the hollow cross section and the shape of the outer periphery of the filament. The number of hollow portions in the filament may be one or more. Further, the hollow cross-section filament has a high flexural rigidity and can give a sense of tension. In the composite yarn of the present invention, it is preferable to use a filament having a SHD of more than 0%. .

Although the composite yarn of the present invention always contains a cationic dye dyeable polyester filament component and a thick and thin polyester filament component, these can exhibit a spun yarn-like dry texture after dyeing. Things. In order to further improve the dry texture, it is preferable to include a filament containing kaolinite, which is an inorganic fine particle capable of forming fine pores after alkali treatment. The filament containing kaolinite forms a large number of micropores that are long in the fiber axis direction on the fiber surface after alkali treatment. The micropores have a maximum value of the frequency distribution of the maximum width of 0.2 to 0.7 [μm ], The average value of the length / maximum width ratio is 3 or less, the number is 10 to 30 per 100 μm 2 of the fiber surface, and the depth is 0. Those having a size of 1 μm or less are preferred. By forming fine pores on the fiber surface after the alkali treatment, a dry texture can be improved. In addition, a small amount of a matting agent other than kaolinite, an antistatic agent, or the like can be included depending on the purpose.

As for the single fiber denier of the filament constituting the composite yarn of the present invention, the filament having a SHD of 0 [%] or less is preferably a relatively thin one of about 0.1 to 3.0 denier, and the SHD is 0 [%]. %], A relatively thick filament of about 1.5 to 10.0 denier is preferable. The composite yarn of the present invention has a good heather-like or frost-like appearance even when it is composed of two types of polyester multifilaments. However, when it is composed of three or more types of polyester multifilaments, it has an appearance closer to top dyed wool. ,preferable. Also in this case, the dyeing property of the polyester filament (the one having substantially no dyeing property with respect to the cationic dye and the one having substantially no dyeing property in the fiber axis direction) and the size of SHD are determined. , Composite yarns of various combinations are included.

For example, (1) a polyester filament substantially insoluble in cationic dyes having an SHD of 0% or less and a dyeable dye of a cationic dye having an SHD of 0% or less or greater than 0%. Combined yarn of polyester filament and thick and thin polyester filament dyeable or substantially unstainable with cationic dyes having an SHD of more than 0%, (2) cationic dyes having an SHD of 0% or less No dyeable polyester filament and no SHD
A combination yarn of a polyester filament which is substantially non-stainable with a cationic dye of greater than [%] and a thick and thin polyester filament which is substantially non-stainable with a cationic dye having an SHD of more than 0 [%]; 3) SHD is 0
[%] Thick and thin polyester filament substantially instable to the following cationic dyes and SHD of 0 [%]
Or a combination yarn of a cationic dye-dyeable polyester filament having a SHD of 0 [%] or less and a polyester dye substantially non-stainable with a cationic dye having a SHD of more than 0 [%]; %] Or less, and a cationic dye-dyeable polyester filament having an SHD of 0% or less or 0% or less and a SHD of 0% or less.
[%] Larger cationic dyes include composite yarns of polyester filaments that are substantially insoluble in dyes. By combining three or more polyester multifilaments, not only the appearance effect is improved, but also the strength of the composite yarn can be improved.

When the composite yarn of the present invention is twisted and used, the appearance of heather or frosting is further improved.
preferable. The number of twists at this time is D [de
n], and when the number of twists is T [T / m], 500 ≦ T × D
A range of about 1/2 ≦ 30000 can be exemplified.

Next, an example of the method for producing the polyester multifilament composite yarn of the present invention will be described. SHD is 0
[%] Or less, to produce a polyester filament having no thick and thin spots, first, an undrawn yarn obtained by spinning a polyester at a spinning speed of 1500 to 4000 [m / min] is preheated to a preheating temperature Tg (glass transition temperature) or higher. Tg + 20 [℃]
And heat setting other than preheating is not performed.
The film is stretched so as to be 5 to 45%. The drawn yarn is a high shrinkage drawn yarn having a boiling water shrinkage of 20 to 60%. The drawn yarn is subjected to relaxation heat treatment at a high relaxation rate such as a relaxation rate of 20 to 100% using a non-contact heater. The heat treatment temperature is closely related to the denier of the multifilament, the yarn speed, and the dimensions of the heater.
[%] Adjust appropriately so as to be below. This SHD is 0
[%] The polyester multifilaments described below can be made of a polyester dyeable to a cationic dye or a polyester substantially non-stainable to a cationic dye. In addition, by combining with the thick and thin stretching method described below, SHD
And a thick and thin polyester multifilament having a content of 0% or less can be produced.

The polyester multifilament having an SHD of more than 0% may be obtained by spinning a polyester and appropriately performing cold drawing or drawing heat setting. Polyester multifilaments substantially immiscible with multifilaments and cationic dyes can be easily obtained.

The thick and thin polyester multifilament has a spinning speed of 1500 to 3500 [m / mi.
n) is obtained by stretching the unstretched yarn spun at the stretching ratio of about the natural stretching ratio while keeping the preheating temperature from room temperature to about Tg and contacting the frictional resistor. By adjusting the temperature of the take-off roller in the range of room temperature to 160 ° C., the shrinkage ratio can be adjusted, and yarns having an SHD of more than 0% and about 70% or less can be produced. This thick and thin polyester multifilament is SH
When D is desired to be 0% or less, it can be obtained by setting the temperature of the take-up roller at the time of stretching to room temperature and performing the above-mentioned relaxation heat treatment. Also in this case, it is possible to obtain a dye that can be dyed with a cationic dye and a dye that is substantially immiscible with the cationic dye.

In the composite step of obtaining a composite yarn, polyester filaments dyeable with a cationic dye, polyester filaments substantially immiscible with a cationic dye, thick and thin polyester filaments, SH
Polyester filament with D of 0% or less, SHD
Contains polyester filaments greater than 0%
Fluid entanglement treatment of more than one type of polyester multifilament. As the fluid entanglement processing nozzle, a so-called interlacer nozzle, a Taslan nozzle, or the like can be used. .

In this way, the polyester multifilament composite yarn of the present invention can be obtained. However, it is preferable that the steps are successively carried out, because it leads to cost reduction. For example, spinning and drawing to obtain a polyester multifilament having an SHD of 0% or less, stretching and relaxation heat treatment, relaxation heat treatment and compounding, and spinning and drawing to obtain a polyester multifilament having an SHD of more than 0% and drawing and compounding. Spinning and drawing to obtain a thick and thin polyester, drawing and compounding can be easily performed in a continuous process.

The polyester multifilament composite yarn of the present invention is twisted, knitted, woven and dyed as required. During the dyeing process, the woven or knitted fabric is sufficiently shrunk in the relaxing step, and a yarn foot difference between a filament having an SHD of 0% or less and a filament having an SHD of more than 0% is developed. Alkaline treatment as needed, soft feeling,
Can be improved. Also, in the constituent filament,
When kaolinite is included, fine pores are formed on the filament surface, and the dry feeling can be improved. At the time of dyeing, dyes (disperse dyes, cationic dyes or both) and dyeing conditions are selected and dyed.
Alternatively, a marbling appearance is obtained. The final setting is performed to remove the strain of the woven or knitted fabric and obtain the dyeing finish.

Next, the measuring method used in the present invention will be described. (1) SHD (dry heat 160 [° C.] shrinkage ratio) The following was performed according to JIS-L-1073. That is, the initial load is 1/10 [g / den] on a wrap reel with an appropriate frame
The wound wound is removed, a load of 1/30 [g / den] is applied to the wound, and its length L0 [mm] is measured. Then, the load is removed, and the litter is immersed in boiling water for 30 minutes while applying 1/1000 [g / den]. After that, the moss is removed from the boiling water, cooled, and then cooled again to 1/30 [g
/ Den] and apply the load L1 [mm]
Is measured. Then, after drying at 60 ° C. for 30 minutes, heat treatment is performed in a dry heat oven at 160 ° C. under a load of 1/1000 g / den. Then, after cooling, a load of 1/30 [g / den] is applied again and the length L2 [mm] at that time is measured. The hot water shrinkage and the dry heat 160 [° C.] shrinkage (SHD) are calculated by the following equations. Hot water shrinkage [%] = (L0−L1) × 100 / L0 SHD [%] = (L0−L2) × 100 / L0 (2) Degree of entanglement A yarn of an appropriate length is taken out and 1/1000 at the lower end. [G /
[den] and hang vertically. Then, a suitable needle is stuck in the thread, slowly lifted, and the distance l (cm) traveled until the load is lifted is measured 20 times.
From this, the average value L [cm] is obtained and calculated by the following equation. Degree of confounding [ke / m] = 100/2 × L (3) A value (measurement value of thick and fine spot) It is measured by a normal test using Wooster / Evenest Tester manufactured by Keisoku Kogyo. A slot was selected based on the denier of the multifilament, and measurement was performed at a yarn speed of 50 [m / min] for 2 minutes while applying false twist, and
A chart is drawn at a speed of [cm / min]. The obtained 50 cm long chart is divided into two, and the maximum value and the minimum value of each of the two divided areas are read from the chart. Assuming that the maximum value of each section is H1, H2 and the minimum value is L1, L2, the measured value of the thick and thin spots and the A value are calculated by the following equations. A value [%] = (| H1 + H2 | / 2) + (| L1 + L2
| / 2) (However, H1 and H2 must be L1
, L2 are adjusted so that they always appear on the minus side of the chart. )

[0030]

【Example】

Example 1 After melt spinning a polyethylene terephthalate semi-dal resin chip having an intrinsic viscosity of 0.61 at a spinning speed of 3000 [m / min], a preheating temperature of 80 [° C] and a draw ratio of 1.67.
The film was cold-stretched to [×] and the hot water shrinkage was 35.0%.
A 0 denier / 18 filament polyethylene terephthalate high shrinkage drawn yarn was obtained. The high shrinkage stretched yarn is fed at a yarn speed of 3
Relaxation heat treatment at 10 [m / min], relaxation rate 45 [%], non-contact type heater length 230 [mm], heater temperature 260 [° C], 29 denier / 18 filament, SHD -4.5 [%] And a thermally stretched yarn substantially immiscible with the cationic dye having an A value of 8.2%. Said heat-extended yarn;
A value of 30.5 [%] and SHD of 20.5 [%] are entangled with a cationic dye-dyeable thick and thin polyester 73 denier / 18 filament by fluid interlacing treatment with an interlacer nozzle. The degree is 52 [ke / m]
A composite yarn of 103 denier / 36 filaments was obtained.
The composite yarn is twisted at S1800 [T / m] and wet heat 70
After the heat setting at [° C.] and 40 [min], the warp density was 154 [lines / inch] and the weft density was 92 [lines / inch].
To obtain a 2/2 twill fabric. After relaxing and presetting, alkali treatment was performed to a weight loss rate of 18%, and dyeing was performed using a cationic dye and a disperse dye with a liquid jet dyeing machine, and final setting was performed. The dyeing treatment had a soft feeling, a swelling feeling, and a dry feeling, and was preferable to have a good frosting appearance.

Example 2 In Example 1, the polymer of the heat-stretched yarn was used with an intrinsic viscosity of 0.
Changed to 45 cationic dyeable polyester, 29
Denier / 18 filament with SHD of -4.5
[%], A thermally dyeable polyester dyeable yarn having an A value of 8.5 [%] was obtained. The heat-extended yarn has an A value of 35.
In the same manner as in Example 1, a polyethylene terephthalate semi-dull thick and thin multifilament of 73 denier / 18 filament having an SHD of 20.0 [%] was combined to obtain a dyed product. Example 1
Similar to the above, it was preferable.

Example 3 An undrawn yarn melt-spun at a spinning speed of 3000 m / min of Example 1 was heated at a preheating temperature of 70 ° C. and a length of 50 m
m], stretched to a stretching ratio of 1.50 [fold] while being in contact with a hot plate at 110 ° C. and a pin-shaped frictional resistor, and subjected to relaxation heat treatment in the same manner as in Example 1 to obtain 32 denier /
18 filaments with SHD of -5.5 [%] and A value of 3
A thick-and-thin heat-extended yarn was obtained which was substantially insoluble in 5.5% of the cationic dye. The thick-and-thin heat-extended yarn was combined with the cationic dye-dyeable thick-and-thin polyester 73 denier / 18 filament of Example 1 in the same manner as in Example 1, and a dyed product was obtained in the same manner as in Example 1. . With respect to the appearance of marbling, the kneading was further improved, which was preferable.

Comparative Example 1 In the compounding step in Example 1, only the plying was performed without performing the fluid entanglement treatment using the interlacer nozzle. Yarn cracking occurred in the parning process before twisting, the twisting property was not good, the opening of the warp in the weaving process was poor, and the greige was not satisfactorily obtained.

COMPARATIVE EXAMPLE 2 When drawing the undrawn yarn of Example 1 at a spinning speed of 3000 [m / min], a hot plate having a length of 300 [mm] and a temperature of 160 [° C.] was provided in the drawing zone. Heat setting was performed to obtain a polyethylene terephthalate drawn heat set yarn having an SHD of 10.0 [%]. The drawn heat-set yarn (20 denier / 18 filament) and the cationic dye-dyeable thick and thin polyester 73 denier / 18 filament of Example 1 were combined in the same manner as in Example 1 to obtain a composite.
A denier / 36 filament composite yarn was obtained. The degree of confounding was 50 [ke / m]. Except that the compactness was adjusted slightly higher, a dyeing treatment was obtained in the same manner as in Example 1. The appearance was acceptable, but the softness and swelling were not satisfactory.

Comparative Example 3 A composite yarn was obtained from the heat-extended yarn of Example 1 and the thick and thin yarn of Example 2 in the same manner as in Example 1, and dyed using only a disperse dye. Although softness and swelling are preferable, they were not satisfactory in terms of good marbling appearance.

COMPARATIVE EXAMPLE 4 The heat-extended cationic dye dyeable polyester yarn of Example 2 and the cationic dye dyeable thick and thin polyester multifilament of Example 1 were composited in the same manner as in Example 1. In the same manner, a dyed product was obtained. However, for dyeing, only a cationic dye was used. Although softness, swelling and dryness were preferred, the color development was extremely good, but the marbled appearance was not satisfactory in terms of ease of disassembly.

COMPARATIVE EXAMPLE 5 The heat-extended yarn of Example 1 and a cationic dye having an SHD of 9.5% and an A value of 6.0% using 73 denier / 24 filament manufactured by Toyobo Co., Ltd. The dyeable polyester multifilament was compounded in the same manner as in Example 1 to obtain a dyed product. Although it was preferable in terms of softness and swelling, it was not satisfactory in terms of good marbling appearance.

Example 4 The cationically dyeable polyester heat-extended yarn of Example 2 and polyethylene terephthalate semi-dal resin were melt-spun from a C-shaped nozzle orifice and stretched to give a hollow ratio of 2.
At 0%, the SHD is 20.0% and the A value is 33.0.
[%] Thick and thin hollow fiber (60 denier / 18
(Filament) in the same manner as in Example 1 to obtain a dyed product. Composite was performed in the same manner as in Example 1 to obtain a dyed product.
Woven with the same denseness as in Example 1, but with the same thickness and swelling as in Example 1, but with a light feeling, a soft feeling, a swelling feeling, a tight feeling, and a good marbling appearance with good stiffness there were.

Example 5 A 73 denier / 18 filament containing the cationic dye dyeable polyester heat-extended yarn of Example 2 and 2.0% by weight of kaolinite having an average particle diameter of 0.3 [μm] was used. ,
A polyethylene terephthalate thick and thin multifilament having an SHD of 19.5% and an A value of 34.5% was combined in the same manner as in Example 1 to obtain a dyed product.
When the surface of the kaolinite-containing filament present in the dyeing work was observed with a microscope, fine holes long in the fiber axis direction were formed, and the dry feeling was improved compared to the dyeing work of Example 2. It was felt and good.

Example 6 The heat-expandable yarn of Example 1, the cationic dye-dyable polyester multifilament yarn, and 2.0% by weight of kaolinite having an average particle diameter of 0.3 μm [%] were 20% hollow. ]
Polyethylene terephthalate thick and thin multifilament 73 denier / 18 filament (SHD
Is 10.0 [%] and the A value is 35.5 [%]) using an interlacer nozzle to form a composite yarn having 177 denier / 54 filaments and an entangling degree of 45 [ke / m]. Obtained. The composite yarn is twisted to S1000 T / m,
[° C], after twisting set of 40 [minutes], using the process,
A 2/2 twill fabric was obtained with a warp density of 133 [lines / inch] and a weft density of 80 [lines / inch]. When the dyeing treatment was obtained in the same manner as in Example 1, it was soft and rich in swelling, but light.
It was moderately taut, had a good dry feeling, and had a very good marbled appearance with a top-dyed wool tone.

[0041]

Since the polyester multifilament composite yarn of the present invention is constituted by including a heat-extended filament, it has a softer feeling and a softer feel than a conventional hetero-shrinkage mixed fiber yarn.
It is possible to provide a woven / knitted fabric rich in swelling feeling. or,
Cationic dye dyeable polyester filaments, polyester filaments substantially insoluble in cationic dyes,
Since it is configured to include thick and thin polyester filaments, it has a very good appearance of heather or marbling, and also has a dry feeling like a spun yarn. Since it is fluid entangled in the combined process, it has good post-process passability and can be widely used in the field of women's or men's clothing and living materials.

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masumi Goto 10-24, Toyocho, Tsuruga-shi, Fukui Prefecture Toyobo Co., Ltd. Examiner at Tsuruga Plant Kenji Sano (56) References JP-A-2-307931 (JP, A JP-A-6-25932 (JP, A) JP-A-4-34035 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D02G 3/04 D01D 5/20 D01F 6 / 62 D02G 3/22-3/24

Claims (6)

(57) [Claims] 1. A polyester multifilament composite yarn comprising an entangled mixed yarn comprising at least the following multifilaments A to C of (1) to (3). (1) The multifilament A is constituted by a filament having a dry heat shrinkage (SHD) of 160 ° C. of 0% or less. (2) The multifilament B is composed of a thick and thin filament. (3) The multifilament C is composed of a cationic dyeable polyester filament. 2. The polyester filament having the maximum SHD [%] and the polyester filament having the minimum SHD [%] have a difference in SHD [%] of 5.0 [%] or more. 2. The polyester multifilament composite yarn according to 1. 3. The polyester multifilament composite yarn according to claim 1, wherein the degree of entanglement is not less than 5 [ke / m] and not more than 100 [ke / m]. 4. The polyester multifilament composite yarn according to claim 1, wherein at least one kind of the polyester multifilament constituting the composite yarn is a filament having a hollow cross section. 5. The multi-filament yarn of claim 1, wherein at least one of the polyester multifilaments comprises a kaolinite-containing filament.
The polyester multifilament composite yarn according to the above. 6. The multifilament when the thick and thin polyester filament present in the composite yarn is composited, wherein the thick and thin polyester multifilament has a thick and thin spot of 15.0% or more. The polyester multifilament composite yarn according to any one of claims 1 to 5, wherein