JPH0663153B2 - Polyester composite processed yarn for worsted fabrics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a polyester composite processed yarn for a worsted fabric, which is composed of a filament group of at least two different finenesses.

[Prior Art] Wool worsted fabric is widely used as an outer garment material for autumn and winter because of its bulkiness, soft touch, waist / resilience and warm feeling.

The false twisted yarn was originally developed for the purpose of making a woven or knitted fabric having bulkiness by possessing crimps such as wool fibers, and the polyester processed yarn is also applicable to the field of woolen knitted fabrics. It is being advanced.

However, when the polyester processed yarn is woven into a worsted woven fabric, the filament fineness is 1.5 to obtain a soft touch.
It is necessary to make it less than or equal to denier, and in this case, there is a drawback that only those with extremely low waist and rebound can be obtained. On the other hand, when the filament fineness is increased in order to increase the elasticity and resilience, only the coarse hardness is increased, and only a woolen woolen fabric having elasticity and resilience can be obtained.

For this reason, various techniques have been proposed, such as using a mixed yarn of large-fineness filaments and fine-fineness filaments or providing fluff, but none of them satisfy both the feel and the process passability at the same time.

The core-sheath composite processed yarn having the fine-fineness filament group as the core and the fine-fineness filament group as the sheath is capable of imparting a soft touch and a waist / repulsion property at the same time, and therefore, many improved techniques have been proposed. Among the composite core-sheath processed yarns, a so-called structure having a structure in which the filament group of the sheath part is wound around the filament group of the core part in an alternating twisted pattern and each filament is mixed and entangled with each other at the boundary part between the core part and the sheath part The alternate twisted and entangled type composite core-sheath false twist textured yarn exhibits a good span-like feeling, and this technique is disclosed in JP-A-54-101946.
There are many proposals such as JP-A-55-98931, JP-A-56-26025, and JP-A-58-156041.

In alternate twisted / entangled type composite sheath false twisted yarn,
In order to improve the resilience, JP-A-57-29629 discloses that the core has a large fineness filament of 3 to 6 denier, the sheath has a fineness of 1 to 4 denier, and the total denier is 400.
Thick denier spunlike yarns of ~ 800 denier are described. However, the number of false twists during false twist has to be set as low as that of thick denier, and the number of false twists is small for thick processed yarns of 400 to 800 denier, and the crimp basic characteristics that should be provided as false twisted yarns. Has the drawback that
In the case of woven fabric, bulging and waist
It has the drawback of low resilience. Further, the textured yarn disclosed in this technique has a thin core filament, and has a drawback that the back and resilience are too small in the case of a worsted fabric. Further, the textured yarn disclosed in this technique cannot avoid the glare defect of the woven fabric.

[Problems to be Solved by the Invention] With the alternate twisted / entangled type composite core sheath false twist textured yarn obtained by the prior art, a high-quality spunlike woven or knitted fabric with a soft touch and a good texture with good elasticity and resilience can be obtained. It wasn't. In particular, when the alkali weight reduction treatment is carried out in order to emphasize the soft texture of the woven or knitted fabric, the lowering of the waist and rebound is remarkable, and the improvement has been desired also from this point.

The object of the present invention can be applied to a carded-like fabric excellent in soft touch and waist / resilience, and can be used especially in the field of men's outerwear for autumn and winter when a high level is required in terms of waist / resilience. An object of the present invention is to provide an alternate twisted / entangled type composite core-sheath false twist textured yarn which can be applied to a high quality worsted fabric.

[Means for Solving the Problems] The above-mentioned object of the present invention is a composite fine-sheath false twisted yarn composed of at least two kinds of polyester filament groups having different filament fineness, and a fine-fineness filament constituting a core portion. The filament fineness of the group is 7.5 to 12 denier and has a cross section of 5 to 8 leaves, and the fineness filament group of the sheath portion has a filament fineness of 0.70 to 3.0 denier and a total fineness of 50 to 360 denier and a large fineness filament. The fineness ratio of the fineness filament group to the group is 0.7
~ 1.4 by means of a polyester composite textured yarn for worsted woven fabric, characterized in that the filaments are wound in an alternating twist around the core, and the filaments are mixed and entangled with each other at the boundary between the core and the sheath. Can be achieved.

The yarn structure of the polyester composite processed yarn for worsted fabrics of the present invention is a core-sheath structure in which the large fineness filament group is the core portion and the fineness filament group is the sheath portion. As shown in the yarn form in FIG. 8, the large fineness filament group composed of the large fineness filament 1 serves as a core portion, and the fineness fineness filament group composed of the fineness fineness filament 2 is alternately twisted around the core filament group. It has a structure in which each filament is mixed and entangled with each other at the boundary between the core and the sheath. With such a core-sheath structure, it is possible to provide a woven fabric having a good spun-like appearance and texture, prevent separation of the core part and the sheath part, and perform good threadability and thread structure in the weaving process. The morphological stability in the longitudinal direction is obtained.

The number of mixed entanglements can be evaluated by the method for measuring the degree of entanglement described later. The degree of entanglement is 150 ko / m from the point of preventing separation of the core part and the sheath part so as not to make a nep and to improve the anti-pill property.
The above is preferable, and 200 k / m or more is more preferable. If the degree of entanglement is too large, the appearance and feel of spun-like will deteriorate, so it is preferably 450 co / m or less, more preferably 400 co / m or less.

The filament fineness of the large fineness filament group needs to be 7.5 to 12 denier. When it is less than 7.5 denier, when it is made into a woven fabric, it is not possible to obtain the waist and resilience comparable to that of a wool worsted fabric. The higher the fineness, the better the resilience and resilience, but if it is greater than 12 denier, the coarse hardness becomes stronger. A denier of 11 or less is preferable for forming a carded-like woven fabric that does not have a coarse and hard feeling and is excellent in elasticity and resilience.

The fineness of the fine filament group is 0.70 to 3.0
Must be denier. In order to impart a soft touch, the denier needs to be 3.0 denier or less, but it is preferably 2.2 denier or less from the viewpoints of further soft touch and forming a worsted fabric and improving the pill resistance. On the other hand, if the denier is too fine, it will be too soft and the texture will be different from that of the worsted fabric.
70 denier or more is required. The finer the denier, the lower the anti-frosting property, the lower the apparent dyeing property, and the more difficult the darkening is. Therefore, it is preferably 1.0 denier or more.

It is necessary that the fineness ratio of the fineness filament group to the fineness filament group is 0.7 to 1.4. If it is less than 0.7, the filaments of large fineness tend to be present on the outer surface of the core-sheath processed yarn, and the feeling of coarseness and hardness becomes stronger. If it is larger than 1.4, the soft touch is emphasized and the waist and resilience are insufficient. Further, when the ratio of the filament fineness of the large fineness filament group to the filament fineness of the fine fineness filament group is 4 times or more, a span-like appearance and a feeling effect are easily exhibited.

The total fineness of the composite processed yarn needs to be in the range of 50 to 360 denier. This is because if the fineness is too fine, the cost increases remarkably, and if the fineness is too large, the crimp developability decreases due to the lowering of the upper limit of the false twist number during false twisting.

It is preferable that there is a yarn length difference of 5 to 30% between both filament groups, and it is more preferable that the yarn length difference is 7 to 25%. In order to have a structure in which the sheath portion is wound around the core portion, the sheath portion needs to be longer, which corresponds to a preferable lower limit value as a yarn length difference. If the difference in yarn length is too large, there are drawbacks such as a feeling of looseness, easy separation of the sheath portion and the core portion, and a decrease in pill resistance.

Since the fineness filament has a fineness of 7.5 to 12 denier, the filament cross section changes during false twisting, and it tends to generate a lustrous luster due to the flattening of the filament surface. It needs to be a variant.

The 5- to 8-leaf cross-section yarn can be obtained by forming slits in a radial shape, the number of which is equal to the number of leaves to obtain the ejection hole shape of the spinneret. 5 and 8 leaf cross sections in the present invention are illustrated in FIGS. 2 and 3, respectively. In addition, the discharge hole shape of the spinneret for obtaining the leaf-shaped cross-section yarn is illustrated in FIGS.

When the fineness filament has a cross section of 4 leaves or less, the interleaf distance is long, resulting in a dazzling luster, and when the cross section of 9 or more leaves is short, the interleaf distance is short, and the filament cross section changes during false twisting. Since it is almost the same as that, a shiny luster occurs. The dazzling luster is one of the factors that extremely deteriorates the quality of the worsted woven fabric, and it is something that should not be found in the high quality worsted woven fabric.

The polyester in the present invention is mainly a polyester composed of a terephthalic acid component and a glycol component such as ethylene glycol or tetramethylene glycol, but is preferably a polyester having ethylene terephthalate of 80 mol% or more. It may be a polyester obtained by substituting a part of terephthalic acid or a glycol component with a part of another (difunctional carboxylic acid or glycol component. Further various additives such as flame retardants, antistatic agents, hydrophilic agents, pigments. Etc. can be added as needed.

When fluff is present in the processed yarn, troubles such as generation of nep of the processed yarn itself or yarn breakage are likely to occur due to catching on the guide or entanglement of yarns running in parallel in a higher step such as weaving. Therefore, it is preferable that the processed yarn is substantially free of fluff, and the number of fluff is preferably 5 or less per 1 m of the yarn, and more preferably 3 or less.

The polyester composite textured yarn of the present invention can be suitably manufactured by the following method.

When at least two kinds of polyester filament groups having different filament fineness are false twisted into a composite core-sheath false twisted yarn, the large fineness filament group has a birefringence of at least 5 × 10 ⁻ than the fineness filament group. ³ large, the filament fineness after false twisting is 7.5 to 12 denier, and the filament fineness after drawing false twisting of the fine fineness filament group is 0.
It is 70 to 3.0 denier, and is a method for producing a polyester composite processed yarn, which comprises subjecting both filament groups to mixed entanglement and then false-twisting.

The fine-fineness filament group has a low birefringence and is subjected to greater elongation than that of the large-fineness filament group during false twisting, which contributes to the fine-fineness filament group having a longer yarn length and forming a sheath portion. The high-fineness filament group may not necessarily be the undrawn yarn, but may be the drawn yarn. In this case, however, the undrawn yarn is preferred because the yarn length difference of more than 30% tends to cause sticking. Both filament group both birefringence 15 to 45 × 10 to ^{- 3} 5-30 birefringence index difference in the range of × 10 ^-
It is preferable to prepare an undrawn yarn as No. ³ from the viewpoint of preventing processing and instability of yarn characteristics due to aging of the undrawn yarn and providing a desired yarn length difference.

The interlaced treatment can preferably impart the mixed yarn mixed entanglement. The degree of entanglement is preferably 20 to 80 k / m in order to obtain an alternate twisted / entangled type composite sheath false twisted yarn.

False twisting conditions untwisting tension _{T 2} and twisting tension _{T 1} of the ratio _T 2 / _{T 1}
Is 1.2 to 0.8, which is smaller than the usual false twisting condition to facilitate the retention of the core-sheath structure, and is not much different from the normal false twisting or drawn false twisting condition, but the following ranges are preferable. The false twist heater temperature is Tm which is the melting point of the polyester filament.
When it is (° C), the range of (Tm-90) ° C to (Tm-40) ° C is preferable. The number of false twists is 17,000 (D) ^1/2 (T / m) to 3 when the fineness of the composite false twisted yarn is D (denier).
The range of 0.00000 / (D) ^1/2 (T / m) is preferable. In the case of draw false twist, the draw ratio of the composite false twist processed yarn is 20 to
It is preferable to set it within the range of 40%. If the elongation is less than 20%, fluff tends to be generated, and if it exceeds 40%, the core-sheath structure is likely to be changed in the knitting and weaving process.

[Examples] The present invention will be described in more detail with reference to Examples. The physical properties in the examples were evaluated as follows.

A. An anti-pill type ICI pilling tester was treated for 10 hours, measured, and judged as follows.

Grade 5 (excellent, pass) Grade 4 (excellent, pass) Grade 3 (good, pass, but may fail depending on the application) Grade 2 (impossible, fail) Grade 1 (impossible, fail, most B.) Frosting resistance After rubbing with a polyethylene terephthalate processed yarn fabric for 20 minutes, it was visually judged.

5th grade (excellent, pass) 4th grade (excellent, almost no traces are recognized, pass) 3rd grade (good, some white traces are recognized, pass) 2nd grade (No, white traces are recognized) 1st grade (No C. Number of fluffs The number of fluffs was also measured from a projection image magnified 5 to 20 times by sandwiching the processed thread between transparent glass plates.

D. Entanglement degree As shown in Fig. 1, the sample thread is applied to the grooved pulley 2 which is rotatable around the central axis 1 without resistance and can be rotated left and right without slipping.
Apply loads 3 and 4 to the two locations. The load shall be the total denier of the sample yarn x 0.4 g.

Then, a fixed needle 5 having an outer diameter of 0.60 mm is pierced and fixed between the short yarns constituting the yarn substantially at a right angle.

Next, load 3 applied to the left side of the sample yarn is further applied with constant load 6 whose weight is denier of single yarn of the sample x 2.0 g, and the sample yarn is moved to the left side until the entanglement part is caught by the constant load 6 and stops. Let

Next, the constant load 6 applied to the load 3 is removed, added to the load 4 on the right side and applied, and the sample yarn is moved to the right side by the constant load 6,
The entangled part is caught by the fixed needle 5 so that it naturally stops. The moving speed of the sample yarn by the constant load 6 is 10 mm / sec. The moving distance l (mm) of the sample yarn to the right side by the above method is obtained,
Calculate the degree of confounding from the following formula.

Entanglement degree = 1000 / l + 0.60 (co / m) E. Glitter gloss The fabric was visually judged under sunlight.

Grade 5 (excellent, pass, no glare) Grade 4 (excellent, pass, almost no glare) Grade 3 (good, pass, slightly glare) Grade 2 (impossible, fail, noticeable glare) Grade 1 (impossible, no glare) Passed, a large amount of glare, and the worst) Example 1 A composite core-sheathed yarn made of polyethylene terephthalate shown in the table was obtained by yarn processing, in which the fine-fineness filament group is the core portion and the fine-fineness filament group is the sheath portion. The intrinsic viscosity of polyethylene terephthalate in orthochlorophenol at 25 ° C is 0.65. Spinning temperature is 290 for large fineness filaments
℃, spinning speed 300m / min, slit width 0.08m shown in Fig. 5
m. Unstretched yarn fineness of 232 to 234 denier, stretched 156 to 158 denier, 8-leaf cross-section, birefringence of 34 to 35 × 10 ⁻ , obtained by spinning using a spinneret having a slit length of 0.50 mm. ^An unstretched yarn of ³ was used. Fine temperature filament group is spinning temperature
Undrawn yarn fineness 223 denier, 147 denier 96 filament after stretching, obtained by spinning using a round hole spinneret with a diameter of 0.20 mm at 290 ° C., a spinning speed of 2400 m / min, and a birefringence of 22 × in a round cross section. 10 ^- using the undrawn yarn is ^3. Intertwisting degree 4 by interlace treatment with air pressure 3kg / cm ² after weaving
Gives a commutation in the range of 5 to 48 k / m, draw ratio 1.52, tension ratio 0.95, false twist temperature 200 ° C, false twist number 1630 T / m, false twist speed 40
Simultaneous drawing and false twisting at 0 m / min. The alternate twisted / entangled type composite core-sheath false twisted yarn has a yarn length difference of 12.0 to 12.3%, an entanglement degree of 315 to 348 co / m, and a fluff number of 1.
It was in the range of substantially 5 fluff / m without fluff.

The obtained composite sheath-and-sheathed yarn was woven into a 2/2 twill surge at a density of 66 warps / inch and weft 64 threads / inch, and the appearance was compared with a wool surge fabric using No. 60 twin yarn. The evaluation results are shown in the table.Although there is no glare at all levels and a span-like appearance and soft touch can be expressed, there is a feeling of carded fabric-like waist and repulsion, and there is no feeling of coarseness and hardness. Therefore, it is necessary that the fineness filament group has 7.5 to 12 denier, and 11 denier or less is preferable.

Example 2 A composite core-sheath processed yarn made of polyethylene terephthalate shown in the table, in which the fine-fineness filament group is the core portion and the fine-fineness filament group is the sheath portion, is obtained by thread processing. The intrinsic viscosity of polyethylene terephthalate in orthochlorophenol at 25 ° C is 0.65. Large fineness filament group are obtained by spinning in accordance with Example 1, the undrawn yarn fineness 232 denier, 156 denier 18 filament after drawing, birefringence 34 × 10 8 leaf section ^- the undrawn yarn is ³ used. A fineness filament group was obtained by spinning in accordance with Example 1, and an undrawn yarn fineness of 216 denier, and a fineness constitution after stretching was as shown in the table.
Filament number, round cross-section, birefringence 22 × 10 ^- Using undrawn yarn is ^3. Interlace treatment and false twisting were performed according to Example 1. The difference in yarn length of the alternate twisted and entangled type composite core-sheath false twisted yarn is in the range of 11.8 to 12.0%,
The degree of entanglement is in the range of 295-368 ko / m, and the number of fluff is 1-5.
Co / m was in a range substantially free of fluff.

The obtained composite core-sheath processed yarn was woven according to Example 1. The evaluation results are as shown in the table, and at any level there is no glare and the appearance of spun-like and waist / resilience can be expressed, but in order to have a soft touch feeling like a worsted fabric fine filament 0.70 ~ It was found that 3.0 denier is required, 1.0 denier or more is preferable from the viewpoint of improving anti-frosting property, and 2.2 denier or less is preferable from the viewpoint of anti-pill property.

Example 3 A composite core-sheathed yarn made of polyethylene terephthalate shown in the table, in which the fine-fineness filament group was the core part and the fine-fineness filament group was the sheath part, was obtained by thread processing. The intrinsic viscosity of polyethylene terephthalate in orthochlorophenol at 25 ° C is 0.65. The large fineness filament group was obtained by spinning in accordance with Example 1, and had a fineness of 232 denier for undrawn yarn and 18 filaments of 156 denier after stretching, and had a multi-lobed cross section as shown in the table, and a birefringence of 34 to 35 × 10 ^{−. An} unstretched yarn of ³ was used. However, the mouthpiece discharge hole is a radial slit hole as shown in FIG. 4 and FIG. 5, the number of slits is equal to the number of cross-section leaves, each slit width is 0.80 mm, and the slit length is 4, 5, 6, 7,
0.30, 0.35, 0.40, 0.45, 0.50, 0 corresponding to 8 and 9 leaves.
55 mm. Fineness Lament group undrawn yarn fineness is 223 denier obtained analogously to Example 1, 147 denier 96 filament after stretching, the birefringence in a round cross-section is 22 × 10 ^- Using undrawn yarn is ^3.

Interlace treatment and false twisting were performed according to Example 1. The alternate twisted / entangled type composite sheath false twisted yarn has a yarn length difference of 11.5 to 12.2% and an entanglement degree of 298 to 352 /
The range was m, and the number of fluff was 1 to 5 / m, which was a range substantially free of fluff.

The obtained composite core-sheath processed yarn was woven according to Example 1. The evaluation results are as shown in the table, and at any level, in order to have a luster and a repulsion property with a spun-like appearance and a soft touch like a worsted fabric, but without undesired glare, The cross section of the fineness filament is 5
It is necessary to make 8 leaves.

Example 4 large fineness filament group obtained by spinning in accordance with Example 1, the undrawn yarn fineness 40 denier, drawn after 27 denier 3 filament birefringence 35 × 10 8 leaf section ^- Not is ³ Stretched yarn was used. The fineness filament group was obtained by spinning according to Example 1, and had an undrawn yarn fineness of 35 denier, 23 denier 22 filament after drawing, a round cross section and a birefringence of 23.
× 10 ^- Using undrawn yarn is ^3. In accordance with Example 1, a composite core-sheath processed yarn made of polyethylene terephthalate in which the fine-fineness filament group is the core and the fine-fineness filament group is the sheath was obtained by processing. 25 of polyethylene terephthalate
Intrinsic viscosity in ortho-chlorophenol is 0.65.
The same processing as in Example 1 was performed except that the degree of entanglement was 31 cores / m and the false twist number was 3630 T / m. An alternate twisted, entangled type composite sheath false twisted yarn was obtained, the difference in yarn length was 11.2%, the degree of entanglement was 224 k / m, and there was virtually no fluff.

The obtained textured yarn was woven at a density of 130 warps / inch and weft 114 threads / inch. The obtained surge woven fabric had no dazzling luster, had a carded-like appearance and soft touch, and had a waist / resilience, and was a high-grade, thin, carded-like woven fabric.

Example 5 A filament having a large fineness was obtained by spinning in the same manner as in Example 1. The undrawn yarn fineness was 268 denier and the drawn fineness was 180 denier.
Using an undrawn yarn that is a ^{3 -} filament birefringence 36 × 10 8 leaf section. Fineness filament group are obtained by spinning in accordance with Example 1, the undrawn yarn fineness 274 denier, after stretching 180 denier 144 filament, birefringence 22 × 10 with a round cross-section ^- undrawn yarn is ³ used. In accordance with Example 1, a composite core-sheath processed yarn made of polyethylene terephthalate in which the fine-fineness filament group is the core and the fine-fineness filament group is the sheath was obtained by processing. Polyethylene terephthalate
The intrinsic viscosity in orthochlorophenol at 25 ° C is 0.65. The same processing as in Example 1 was performed except that the degree of entanglement was 55 cores / m and the false twist number was 1480 T / m. Alternate twisted and entangled type composite sheath false twisted yarn can be obtained, and the yarn length difference is 12.9.
%, The degree of entanglement was 295 ko / m, and there was virtually no fluff.

The obtained textured yarn was woven according to the example at a density of 57 warps / inch and weft 55 threads / inch. There was no dazzling luster, and it was a thick, carded-like woven fabric with a carded-like appearance and soft touch, and waist and resilience with a high-grade feeling.

Example 6 In order to confirm the effect of the fineness of the fine-fineness filament group with respect to the large-fineness filament group, the composite core-sheath processed yarns of levels 24 to 27 shown in the table were obtained according to Example 1. Birefringence of a large fineness filament groups 34 × 10 ^{- 3,} and fineness filament group birefringence in MaruYo cross section 22 × 10 ^- Using undrawn yarn is ^3. The same processing as in Example 1 was carried out except that the degree of entanglement was 46 to 55 cores / m, and an alternate twisted, entangled type composite core-sheath processed yarn was obtained, and the yarn length difference was in the range of 11.8 to 12.4%. The degree of entanglement is in the range of 290 to 351 ko / m, and the number of fluff is 2 to 5
Co / m was in a range with substantially no fluff. The level N
o.24, 25, 26, and 27, the combinations of undrawn yarn fineness of the fine filament group and undrawn yarn fineness of the fine filament group are 276 denier-179 denier, 266 denier-190 denier, 190 denier-271 denier, respectively. And 184 denier-2
It is 75 denier.

As shown in the table, the woven fabric obtained by weaving according to Example 1 has a large fineness and a fineness relative to a filament group in order to obtain a soft touch, a waist, and a repulsive feel of a worsted woven fabric. It was found that the fineness ratio of the filament group should be 0.7 to 1.4.

[Effects of the Invention] In the composite core-sheath false twisted textured yarn of the present invention, the filament group of the sheath portion is wound around the filament group of the core portion in an alternate twist shape, and each filament is mutually wound at the boundary portion between the core portion and the sheath portion. Due to its mixed and entangled structure, it can be applied to fabrics with a spun-like appearance and texture. Moreover, since the large fineness filaments and the fineness fineness filaments in a specific fineness range are respectively arranged in the core portion and the sheath portion, it is possible to favorably apply to a worsted fabric having a soft touch and excellent waist and resilience. . In particular, it is suitable for high-quality worsted fabrics that can be used in the field of men's outerwear for autumn and winter, which requires a high level in terms of waist and resilience.

[Brief Description of Drawings] FIG. 1 is an explanatory view of the measurement of the degree of confounding, and FIGS.
The cross-sectional shape of 8-leaf cross-section yarn, Fig. 4,5 shows the spinneret discharge hole shape for obtaining 5-leaf and 8-leaf cross-section yarn, respectively, and Fig. 6 and 7 show the cross-sectional shape of 4-leaf and 9-leaf cross-section yarn, respectively. By way of example, FIG. 8 illustrates the yarn form of the alternate twisted, entangled type composite core-sheath false twisted yarn of the present invention. 1: Thick fine filament 2: Fine filament

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Claims (1)

[Claims] 1. A composite core-sheath false twist textured yarn composed of at least two kinds of polyester filament groups having different filament fineness, wherein the filament fineness of the thick fine filament group constituting the core is 7.5 to 12 denier and 5 to 5. 8
It is a leaf cross section, the filament fineness of the fine filament group that constitutes the sheath is 0.70 to 3.0 denier, the total fineness is 50 to 360 denier, and the fineness filament group to the fineness filament group has a fineness ratio of 0.7 to 1.4. A polyester composite processed yarn for worsted woven fabric, characterized in that it is wound around a certain core portion in an alternating twisted pattern, and each filament is mixed and entangled with each other at a boundary portion between the core portion and the sheath portion.