JP3236221B2 - Splittable false false twist 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 composite false-twisted yarn having splitting properties and capable of expressing a strong squeaky feeling and a dry touch feeling, and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, due to the development of synthetic fiber technology for clothing, materials with a high degree of texture of natural fibers, and materials that have departed from the imitation of natural fibers and have a texture that does not exist or exceed nature A new synthetic fiber was created. A material characterized by swelling and softness developed from different shrinkage blending technology, a material characterized by spanning texture utilizing the composite false twisting technology, and
It is a material that pursues a dry and squeaky texture.

[0003] Among them, various advanced materials such as swelling, softness and spanning feeling have been proposed as materials having a warm taste. It was unsatisfactory to express the strong squeaky feeling of wild silk and the unique dryness and squeaky feeling of synthetic fiber, even at the level of dryness and squeakiness of the silk thread.

A method for producing a woven or knitted fabric having a dry feeling is disclosed in Japanese Patent Publication No. 63-56346.
This expresses a dry feeling by treating an additive-containing polyester fiber with an alkaline solution and removing the additive to generate streaky voids. According to this technique, the plastic sliminess of ordinary polyester woven or knitted fabric can be reduced to give a dry feeling like silk fabric, but it is difficult to give a strong squeaky feeling like wild silk fabric. Was.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to improve the side cross-sectional morphology of a polyester fiber so as to express a novel dry and squeaky feeling similar to wild silk or synthetic fiber. An object of the present invention is to provide a twisted yarn and a method for producing the twisted yarn.

[0006] The present inventors are not microscopic enough to create fine streaky voids on the surface of the fiber, but rather as if the cross section of the fiber was more severely eroded, like a ria coast. When viewed in the direction of the fiber axis, the jagged in / out forms a fiber surface morphology that appears as a sharp ridgeline. We thought that if it could be made into a regular shape, we would be able to express a strong squeaky feeling in addition to a dry feeling, and accumulated various research and evaluation of the obtained processed yarn, and reached the present invention.

[0007]

According to the present invention, there is provided a composite false twisted yarn comprising a core yarn and a side yarn entangled around the core yarn, wherein the side yarn is incompatible with polyester and the polyester. A splittable composite false-twist yarn comprising a multilobed cross-sectional filament, which is constituted by a polyester composition comprising an organic compound of the above, and is provided with splitting properties at the joint base of each lobe by false twist strain. It is.

In a method for producing a composite false twisted yarn in which two or more kinds of polyester multifilament yarns having a difference in elongation are combined and false-twisted or drawn false-twisted, polyester yarn is used as a high elongation side yarn. And a polyester composition comprising the polyester and an incompatible organic compound, and using a polyester multifilament yarn having a multilobe-shaped fiber cross section. is there.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The composite false twist yarn of the present invention is a composite false twist yarn comprising a core yarn and a side yarn entangled around the core yarn. Is composed of a polyester composition comprising an incompatible organic compound. The incompatible organic compound has the following general formulas (I) and (II) in view of fiber splitting property, strength, dyeing property and the like. It is preferable to be composed of at least one compound selected from the group consisting of (III) and (III).

[0010]

Embedded image

Wherein Z is an organic compound residue having 1 to 6 active hydrogens, R ¹ is an alkylene group having 6 or more carbon atoms,
R ² is a hydrogen atom, a monovalent hydroxy hydrocarbon group having 1 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms, and k is 1
An integer from 1 to 6, l is an integer such that k × l is 70 or more, and m is 1
Represents the above integer. )

[0012]

RSO ₃ M (II) (wherein, R represents an alkyl group having 3 to 30 carbon atoms or an aryl group having 7 to 40 carbon atoms, and M represents an alkali metal or an alkaline earth metal.)

[0013]

Embedded image RSO ₃ PR ₁ R ₂ R ₃ R ₄ ... (III) (wherein, R is the same as the definition of R in the above formula (II), and R ₁ R ₂ R ₃ R ₄ is an alkyl group or It is an aryl group.) The content of the organic compound in the polyester matrix is preferably 0.1 to 10% by weight. If it is less than 0.1% by weight, the splitting properties of the side yarn fibers cannot be obtained, and
If the amount is more than 10% by weight, there is a problem in that the strength of the side yarn fiber is reduced and the color fastness is reduced.

The compound of the above formula (I) will be described in more detail.

[0015]

Embedded image

In the above formula, Z is a residue of an organic compound having 1 to 6 active hydrogens, such as methanol, propanol, butanol, phenol, ethylene glycol, bisphenol A, propylene glycol, butylene glycol, butanediol, Residues of hydroxy-containing compounds such as glycerin, trimethylolpropane, triethanolamine, diglycerin, pentaerythritol, and sorbitol, and residues of primary and secondary amines such as ethylenediamine, hexamethylenediamine, and diethylenetriamine Among them, a hydroxy group-containing compound is preferable.

R ¹ is an alkylene group having 6 or more carbon atoms or a substituted alkylene group, among which a substituted alkylene group having 6 to 50 carbon atoms is preferable. Particularly preferred specific examples of R ¹ include a cyclohexyl group, a phenylethylene group, a hexylethylene group, a methyl-pentylethylene group, a heptylethylene group, a methyl-hexylethylene group, and an alkylethylene group having 12 to 40 carbon fibers. I can give it. R ¹ may be a mixture of two or more of the above.

R ² is a hydrogen atom, a monovalent hydrocarbon group having 1 to 40 carbon atoms, a monovalent hydroxy hydrocarbon group having 2 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms. The hydrocarbon is preferably an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkylaryl group or a hydroxyalkyl group. The alkyl group is preferably an alkenoyl group, a cycloalkylcarbonyl group, an arylcarbonyl group, or an alkylarylcarbonyl group.

K is an integer of 1 to 6 corresponding to the number of active hydrogens of the organic compound which is a source of Z. l is k × l is 7
It must be an integer that is 0 or more, and may be the same or different between and within molecules. If the value of k × l is less than 70, the dispersion of the compound in the yarn becomes too fine, the splitting property of the fiber is reduced, and the dry touch and squeaky feeling of the obtained fabric are reduced.

Further, the value of k × l becomes large, and especially when this value exceeds 2,000, the surface of the yarn becomes sticky and the dry touch and squeaky feeling of the obtained woven or knitted fabric are lost. It is preferable that the value of k × l be an integer that is 2000 or less. A more preferred range of k × l is in the range of 100 to 500.

M is an integer of 1 or more and is intermolecular or
Although they may be the same or different in the molecule, m must be an integer of 1 or more in the k branches bonded to Z.

The arrangement of the CH ₂ CH ₂ O unit and the R ₁ O unit constituting the polyoxyethylene-based polyether may be arbitrary, and even if the units are arranged randomly, the units may be arranged in an arbitrary order. May be arranged to form a block, and among them, it is preferable that the R ¹ O unit forms a block alone or forms a block and is localized at the terminal of the polyether molecular chain.

The polyoxyethylene-based polyether may have an oxyalkylene unit having 3 to 5 carbon fiber yarns copolymerized. The introduction of the oxyalkylene group lowers the melting point of the polyether while simultaneously lowering the melting point of the polyether. Since it has an effect of lowering the melt viscosity, it may be preferable in handling polyether. Examples of the oxyalkylene group having 3 to 5 carbon atoms include an oxypropylene group, an oxytetramethylene group, an oxyethylethylene group, an oxyethylpropylene group, and a mixture of two or more thereof.

The polyoxyethylene-based polyether comprises, as an active hydrogen compound, ethylene, an olefin oxide having 6 or more carbon atoms and, if necessary, 3 to 3 carbon atoms.
5 can be synthesized by reacting the alkylene oxide. Among these olefin oxides, nonene oxide, cyclohexene oxide and α-olefin oxides having 12 to 40 carbon atoms are particularly preferable.

The side yarn of the composite false twist yarn has a multilobe cross section in which a multifilament yarn having a multilobe cross section is composite false twisted, and has splitting properties at the joint base of each lobe due to false twist distortion. are doing.

Here, the splitting property means that when the composite false twisted yarn is treated with an alkaline solution, the strain inherent in the constituent fibers causes
It refers to the property that the fiber splits into a plurality of irregular shapes and the split surface has an uneven cross-section like a ria coast. It should be noted that the splitting of the composite fibers obtained by bonding different polymers at the bonding surface is different from the splitting property mentioned here and is not included in the present invention.

The number of lobes in the multilobe section is preferably 2 to 8, more preferably 3 to 5. If it is less than 2, the splitting properties of the side yarn fibers are insufficient, and if it exceeds 8, the splitting of the side yarn fibers becomes too fine and the feeling of squeaking is insufficient.

Here, the multi-lobe section is shown in FIG.
(A), (b), and (c), a form having a concave portion directed toward the cross section on the outer periphery of the fiber cross section, that is, the intersection angle θ of a tangent drawn along the outer periphery is measured from the inside of the cross section. 18
It refers to a fiber cross section having a concave shape such that it becomes 0 ° or more.

The single-fiber fineness of the multilobe cross section fiber is:
Preferably 0.8-5 denier, more preferably 1-3
Denier. If it is less than 0.8 denier, the splittable single-fiber fineness becomes thin and the texture becomes insufficient. If it exceeds 5 denier, the texture becomes coarse and hard.

The yarn structure of the composite false twist yarn of the present invention is shown in FIG.
As shown in (a), (b) and (c), a structure in which the side yarn S is wound around the core yarn C by alternate twisting and tangled, while the side yarn S is along the side surface of the core yarn C A twined structure, or a yarn structure that has a structure in which those structures are mixed and tangled in the length direction of the composite false-twist yarn and that prevents the occurrence of NEP due to ironing during false twisting or during handling in a post-process. preferable. Further, in a composite false twisted yarn having a structure in which the side yarn S is not wound around the core yarn C in an alternately twisted shape and is tangled along the side surface of the core yarn C, the side yarn S is applied around the core yarn C so that the side yarn S is wound around the core yarn C. When used as a wound structure, the weaving and weaving properties are improved.

As the core yarn of the composite false twist yarn of the present invention, a polyester multifilament yarn is preferable. In addition to polyethylene terephthalate fiber, a copolymer component based on the main acid component and / or glycol component constituting the polyester is 5 to 5%. Polyester fibers copolymerized at 18 mol% are preferred. As the copolymerization component, isophthalic acid, bisphenol A and its ethylene oxide adduct are preferable. The heat shrinkage required for the core yarn may be determined from the relationship with the bulkiness required for the woven or knitted fabric, and the type of polyester fiber may be appropriately selected.

When the composite false twisted yarn of the present invention is treated with an alkaline solution, at least a part of the multilobe cross-sectional fibers constituting the side yarn is split. As shown in the schematic diagram of FIG. 3, the split fiber splits at the root of the multilobe cross section, the split surface R has irregularities like a ria coast, and the shape becomes an irregular shape according to the split site. . The split surface R appears on the inside or the surface of the woven or knitted fabric due to the false twist crimping of the side yarn and the heat shrinkage of the core yarn, and a strong squeaky feeling, which is difficult with conventional fibers, is obtained.

In addition, in the above-mentioned alkali solution treatment, incompatible organic substances on the side yarn fiber surface are removed at the same time, streak grooves are generated along the fiber axis direction, and a dry feeling is obtained.

Further, fibrils can be generated on the side yarn fiber surface by rubbing the surface of the composite false twisted yarn during or before or after the alkali solution treatment.

The alkali solution treatment may be performed on the composite false twisted yarn or woven or knitted fabric, but the woven or knitted fabric has better processability.

Next, the method for producing the splittable composite false twist yarn of the present invention will be described in detail.

In a method of producing a composite false twisted yarn in which two or more kinds of polyester multifilament yarns having a difference in elongation are combined and false-twisted or drawn false-twisted, polyester and polyester are used as yarns on the high elongation side. A polyester multifilament yarn composed of a polyester composition comprising a polyester and an incompatible organic substance is used.

Here, as the incompatible organic substance, the organic substance described in the embodiment of the composite false twist yarn of the present invention is used.

It is necessary that the high elongation side yarn has a multi-lobed fiber cross section.

The irregularity of the cross section of the multilobe (FIG. 5)
The ratio d ₂ / d _{1 of} d ₁ and d ₂ ) is preferably from _{2 to} 3.7.

A method for imparting splitting properties to the composite false twisting yarn by the process of FIG. 6 showing one embodiment will be described with reference to an example.

The yarn (A) on the high elongation side is combined with the yarn (B) on the low elongation side, mixed and entangled by the entanglement nozzle (2), and fed via the supply roller (3). , To the false twisting zone. Here, in the composite yarn mixed and entangled, the high elongation side yarn is relatively shifted to the outer layer portion, the low elongation side yarn is relatively moved to the inner layer portion by false twisting, and both yarns are mixed. It becomes a composite yarn having entanglement at the interface of the strip.

At this time, since the yarn on the high elongation side has a multilobe-shaped cross section (for example, FIG. 4A), forces such as twisting, compression, and shearing of twist deformation are concentrated at the root of the multilobe cross section. Acts on the interface between the polyester matrix at the base of the multilobe cross section and the fine particles of the incompatible substance, which causes internal strain, ie, rupturability, which can be preferentially split by the alkali solution treatment (see FIG. )).

As the yarn on the high elongation side, a low-oriented undrawn yarn or a high-oriented undrawn yarn is used. As the yarn on the low elongation side, a highly oriented undrawn yarn or a drawn yarn is used. Among them, when a yarn that can be drawn is used, false twist can be stretched and false-twisted. It is preferable because false twisting can be performed. The drawable yarn is a speed of 2500 to 3500 m
/ Min. So-called POY spun at 4,500 m / m
in. So-called USY spun before and after, spun drawn yarns with an elongation of 50% or more, and the like.

The low elongation side yarn is preferably a polyester multifilament yarn. In addition to the polyethylene terephthalate fiber, the copolymer component is 5 to 18 mol based on the main acid component and / or glycol component constituting the polyester. % Copolymerized polyester fibers are preferred. As the copolymerization component, isophthalic acid, bisphenol A and its ethylene oxide adduct are preferable.

Since the polyester obtained by copolymerizing the copolymer component generally has a high heat shrinkage, the heat shrinkage of the composite false twist yarn can be increased, and a woven or knitted fabric having a high bulk can be obtained.

The false twist condition of the composite false twist is determined from the viewpoint of imparting splitting properties to the high elongation side yarn. The higher the number of false twists, the better. In the following formula (1),

[0048]

(Equation 1)

(Where α is the twist coefficient, T is the number of false twists (T /
m), De is the fineness (denier) of the composite false twist yarn) The twist coefficient α is set to 0.85 to 1.3, or the friction false twist D / Y (the ratio of the surface speed of the false twist disk to the yarn speed) ) Is preferably from 1.8 to 2.2.

The heater temperature is preferably from 100 to 190 ° C., and more preferably from 120 to 160 ° C. from the viewpoint of imparting cleavability. The draw ratio is 65% to 8% of the cut elongation of the low elongation side yarn.
The draw ratio is preferably 0%, but a higher draw ratio is preferable from the viewpoint of imparting splitting properties.

It is preferred that the composite false twisted yarn is entangled from the viewpoint of improving the yarn processability and the handleability in the subsequent process, and it is preferable to impart the entanglement before false twisting and / or after false twisting. Interlaced nozzles and Taslan nozzles are suitable as interlacing tools. The number of interlaces is preferably 40 to 120 / m.

[0052]

【Example】

Example 1 A polyethylene terephthalate polymer to which 1.5 parts by weight of a polyoxyethylene-based polyether was added as a high elongation-side yarn was spun at a speed of 1100 m / min using a spinneret for a triangular cross-section yarn having a high degree of irregularity. Then, a trilobal section having a degree of irregularity of 2.7, elongation of 310%, 150 denier and 36 filaments were obtained.

On the other hand, a polyethylene terephthalate polymer obtained by copolymerizing 12% by mole of isophthalic acid was spun at a speed of 3300 m / min as a low elongation side yarn, and the elongation was 13
A highly oriented undrawn yarn of 0%, 125 denier and 12 filaments was obtained.

These two yarns were aligned and processed in the process shown in FIG. Entangling was performed using an interlace nozzle under the conditions of a pneumatic pressure of 2 kg / cm ² and an overfeed rate of 2%, followed by a heater temperature of 130 ° C., a draw ratio of 1.7 times, and a surface of a circumscribed friction false twist disk. Speed 6
00m / min. At a processing speed of 300 m / min. To give a composite false twist.

In the obtained composite false twisted yarn, the yarn of the low elongation side becomes the core, the yarn of the high elongation side becomes the side yarn, and the yarn is entangled, and the interface between the core yarn and the side yarn is entangled. It was a structure having. The characteristics of the yarn include a yarn length difference of 18% between the core yarn and the side yarn, and a crimp ratio of 5.5.
%, Boiling water shrinkage 9%, strength 2.8 g / de, elongation 19
%, The number of entanglements was 55 / m, and the trilobal cross section of the side yarn had undergone false twist deformation.

Next, 1600 T was added to the obtained composite false twisted yarn.
/ M twisted, woven in a 2/2 twill texture, relaxed (100 ° C, 25 minutes treatment), preset (180 ° C,
45 seconds treatment), alkali weight loss (NaOH 35 g / l solution, 97 ° C treatment, weight loss rate 23%), dyeing (130 ° C, 4%
The fabric was finished by performing a final set (treatment at 160 ° C. for 45 seconds) for 5 minutes.

On the surface of the finished woven fabric, splitting of the side yarns of the composite false twisted yarn and streak-like fine pores were recognized, and there was also a fibrillated portion, and the soft touch of fibrils was added to the feeling of strong squeaky feeling. It was a spun rayon-like fabric with a strong squeaky texture.

[Example 2] As the high elongation side yarn, carbon number 8
A polyethylene terephthalate polymer obtained by adding 1.5 parts by weight of sodium alkyl sulfonate having an average carbon number of 14 to -20 is spun at a speed of 1200 m / min by using a spinneret for a high-profile triangular cross-section yarn, and a Trilobal cross section of 9.9, elongation 290%, 150 denier, 36
An undrawn filament was obtained.

On the other hand, a polyethylene terephthalate polymer obtained by copolymerizing 6 mol% of bisphenol A was spun at a speed of 3500 m / min as a low elongation side yarn, and the elongation was 1
A 25%, 125 denier, 12 filament highly oriented undrawn yarn was obtained.

These two yarns were aligned and processed in the process shown in FIG. The confounding is applied using a Taslan nozzle using a pneumatic pressure of 5
entanglement under the conditions of kg / cm ² and an overfeed rate of 3%, followed by a heater temperature of 150 ° C. and a draw ratio of 1.7.
Double, surface speed of circumscribed friction false twist disk 850m
/ Min. Processing speed 400 m / min. To give a composite false twist.

In the obtained composite false twisted yarn, the yarn of the low elongation side becomes the core, the yarn of the high elongation side becomes the side yarn, and the yarn is entangled, and the interface between the core yarn and the side yarn is entangled. It was a structure having. The characteristics of the yarn include a yarn length difference of 25% between the core yarn and the side yarn, and a crimp ratio of 4.8.
%, Boiling water shrinkage 13%, strength 2.9g / de, elongation 22
%, The number of entanglements was 43 / m, and the trilobal cross section of the side yarn had undergone false twist deformation.

Next, 1300 T was applied to the obtained composite false twisted yarn.
/ M twisted, woven in a 2/2 twill texture, relaxed (100 ° C, 25 minutes treatment), preset (180 ° C,
45 seconds treatment), alkali weight loss (NaOH 35 g / l solution, 97 ° C treatment, weight loss rate 20%), staining (130 ° C, 4%
The fabric was finished by performing a final set (treatment at 160 ° C. for 45 seconds) for 5 minutes.

On the surface of the finished woven fabric, split side yarns and streak-like micropores of the composite false twist yarn are recognized, and the fabric has a strong squeaky and dry feeling, and the bulkiness increases due to shrinkage of the core yarn. It is a new synthetic fiber-like woven fabric that also has a swelling feeling.

Example 3 Tetrabutylphosphonium dodecylbenzenesulfonate was used as a high elongation side yarn.
5 parts by weight of the polyethylene terephthalate polymer was added at a speed of 130 using a spinneret for a high-profile triangular cross-section yarn.
The yarn was spun at 0 m / min to obtain a trilobal cross section having a degree of irregularity of 2.7, an elongation of 280%, 150 denier and 36 filaments.

On the other hand, a polyethylene terephthalate polymer was spun as a low elongation side raw yarn at a speed of 3500 m / min to obtain a highly oriented undrawn yarn having an elongation of 125%, 125 denier and 15 filaments.

These two yarns were aligned and processed in the process shown in FIG. Entangling was performed using an interlace nozzle under the conditions of a pneumatic pressure of 2 kg / cm ² and an overfeed rate of 1.5%, followed by a heater temperature of 150 ° C., a draw ratio of 1.7 times, and a circumscribed friction false twist disk. Surface speed of 700 m / min. Processing speed of 350 m / min. To give a composite false twist.

In the obtained composite false twisted yarn, the yarn of the low elongation side becomes the core, the yarn of the high elongation side becomes the side yarn, and the yarn is entangled, and the interface between the core yarn and the side yarn is entangled. It was a structure having. The characteristics of the yarn include a yarn length difference of 25% between the core yarn and the side yarn, and a crimp ratio of 5.1.
%, Boiling water shrinkage 5.0%, strength 2.9 g / de, elongation 2
At 3%, the number of entanglements was 48 / m, and the trilobal cross section of the side yarn had undergone false twist deformation.

Next, 1300 T was applied to the obtained composite false twisted yarn.
/ M twisted, woven in a 2/2 twill texture, relaxed (100 ° C, 25 minutes treatment), preset (180 ° C,
The fabric was finished by performing an alkali weight loss (35 g / l solution of NaOH, 97 ° C., weight loss%), dyeing (130 ° C., 45 minutes), and final setting (160 ° C., 45 seconds).

On the surface of the finished fabric, splitting of the side yarns of the composite false twisted yarn and streak-like micropores were recognized, and the fabric was a full-fledged tussah-like fabric with a strong squeaky and dry feel. .

[0070]

According to the composite false twisted yarn of the present invention, since the side yarn filament has a multilobe cross section and has a splitting property at the joint base of each lobe due to false twist strain, the multifilament is treated by an alkali solution treatment. At least a part of the lobes is split at the base thereof to form irregular shaped uneven split surfaces, and a woven or knitted fabric having a strong squeaky feeling is obtained.

Since the incompatible organic compound is dispersed in the form of particles in the polyester matrix, the alkaline solution treatment produces elongated grooves along the filament axis direction on the filament surface, and a dry feeling is also added. You.

Furthermore, during or before or after the treatment with the alkali solution, the surface of the side false filaments can be formed by rubbing the surfaces of the composite false twisted yarns to add a fibril feeling.

According to the method for producing a composite false twist yarn of the present invention,
Splitting property due to false twist can be imparted to the base of each lobe joint of the multifilament of the composite false twist side yarn.

[Brief description of the drawings]

FIG. 1 is a diagram exemplifying a multi-lobe section according to the present invention.

FIG. 2 is a diagram illustrating a state in which a side yarn is tangled around a core yarn in the composite false twist yarn of the present invention.

FIG. 3 is a view exemplifying a split state developed in side yarn fibers when the composite false twist yarn of the present invention is treated with an alkaline solution.

FIG. 4 is a view exemplifying how the side yarn multilobe fiber of the composite false twist yarn of the present invention changes from the original yarn (a), after the composite false twist (b), and after the alkali solution treatment (c).

FIG. 5 is a diagram illustrating the degree of irregularity referred to in the present invention.

FIG. 6 is a diagram showing a manufacturing process according to one embodiment of the present invention.

[Explanation of symbols]

 A: High elongation side yarn B: Low elongation side yarn 1 ... Supply roller 2 ... Entanglement processing nozzle 3 ... Supply roller 4 ... Heater 5 ... Friction false twist device 6 ... Take-up roller 7: Winding device S: Side yarn of composite false twist yarn C: Core yarn of composite false twist yarn R: Splitting surface of multilobe filament

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI D03D 15/00 D03D 15/00 C D06M 11/36 D06M 5/02 G (72) Inventor Masaaki Yanagihara Kitayoshida-cho, Matsuyama-shi, Ehime 77 Teijin Co., Ltd. Matsuyama Office (72) Inventor Hiroyuki Osaka 77 Kitayoshida-cho, Matsuyama City, Ehime Prefecture Teijin Co., Ltd. Matsuyama Office (56) References JP-A-54-77746 (JP, A) JP-A-5 −51821 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D02G 3/22 D01D 5/253 D01F 6/92 D03D 15/00 D06M 11/36

Claims (10)

(57) [Claims] 1. A composite false twist yarn comprising a core yarn and a side yarn entangled around the core yarn, wherein the side yarn is a polyester composition comprising a polyester and an organic compound incompatible with the polyester. A splittable composite false twist yarn comprising a multilobed cross-section filament, which is made of a material and is given a splitting property at the joint base of each lobe by false twist strain. 2. The splittable material according to claim 1, wherein the incompatible organic substance is at least one compound selected from the group consisting of the following general formulas (I), (II) and (III). Composite false twist yarn. Embedded image (Wherein, Z is an organic compound residue having 1 to 6 active hydrogens, R ¹ is an alkylene group having 6 or more carbon atoms, R ² is a hydrogen atom, a monovalent hydroxy hydrocarbon group having 1 to 40 carbon atoms, Or a monovalent acyl group having 2 to 40 carbon atoms, k is an integer of 1 to 6,
l is an integer such that k × l is 70 or more, and m is an integer of 1 or more. RSO ₃ M (II) (wherein, R represents an alkyl group having 3 to 30 carbon atoms or an aryl group having 7 to 40 carbon atoms, and M represents an alkali metal or an alkaline earth metal). RSO ₃ PR ₁ R ₂ R ₃ R ₄ ... (III) (wherein, R is the same as the definition of R in the above formula (II), and R ₁ R ₂ R ₃ R ₄ is an alkyl group) Or an aryl group.) 3. The splittable composite false twist yarn according to claim 1, wherein the number of lobes in the multilobe section is 2 to 8. 4. The splittable composite false twist yarn according to claim 1, wherein the yarn is entangled between the core yarn and the side yarn. 5. A method for producing a composite false twisted yarn in which two or more kinds of polyester multifilament yarns having a difference in elongation are combined and false-twisted or drawn false-twisted. And a polyester composition comprising the polyester and an incompatible organic compound, and using a polyester multifilament yarn having a multilobe fiber cross section, comprising the steps of: . 6. The method according to claim 5, wherein the number of lobes in the multilobe section is 2 to 8. 7. The multi-lobe cross section has an irregularity of 2 to 3.7.
The method for producing a splittable composite false twist yarn according to claim 5 or 6, wherein 8. The method for producing a splittable composite false twist yarn according to claim 5, wherein the entanglement treatment is performed before and / or after false twisting. 9. A woven or knitted fabric comprising the splittable composite false twist yarn according to claim 1 and subjected to an alkali treatment, wherein each filament in the side yarn covering the woven or knitted fabric comprises: (a) a multilobe Strong creaking sensation characterized by having an irregularly shaped uneven cleavage surface formed by splitting at least a part of the lobes at the root thereof, and (b) an elongated groove along the fiber axis direction on the fiber surface. Hand-woven fabric. 10. The strong knitting feeling knitted fabric according to claim 9, wherein at least a part of the side yarn multifilament has fibrils.