JP2001055625A - Undrawn polyester-based blend yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an undrawn polyester-based blend yarn excellent in yarn processbility and general purpose usability in an after processing and capable of improving feeling characteristics such as bulky feeling, curly grain feeling, color development, dry feeling, water absorbing properties, repulsive feeling and the like. SOLUTION: This undrawn polyester blend yarn consists of two sorts of filament groups of a copolymerized polyester and an uncopolymerized polyester and satisfies the following characteristics: (1) the blend ratio of the filament group comprising the copolymerized polyester: 30-70%, (2) the elongation at break (E): 100-200%, (3) the difference in elongation at break (E): 0-20%; the difference of the elongation at break is calculated from the following equation: E (%)=[(Ea-Eb)/Eb]×100, Ea: the elongation (%) at break of the filament group comprising the copolymerized polyester, Eb: the elongation (%) at break of the filament group comprising the uncopolymerized polyester; and (4) the confounding factor (CF): 2-10/m.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester-based undrawn yarn, and more particularly, to a yarn having excellent workability and versatility in high-order processing, and to have a feeling of swelling, heat, color and dryness. The present invention relates to a polyester blended unstretched yarn which can improve texture characteristics such as water absorption and resilience.

[0002]

2. Description of the Related Art Conventionally, polyester fibers have been widely used for clothing because of their excellent mechanical properties and various fastnesses. In order to produce high-quality clothing fabrics, various improvements have been made such as improvement in cross-sectional form, differential shrinkage mixing, mixing of different fineness, and ultrafineness, and have been established as general-purpose materials.

[0003] Among them, the mixed fiber technology is widely used. For example, for the purpose of imparting a large swelling feeling to a fabric, Japanese Patent Application Laid-Open No. Hei. Gazette, Japanese Patent Laid-Open No. 2
No. 195528, for example. By using the mixed fiber obtained by these proposals, a swelling feeling can be imparted to the fabric, but in any case, since it is a drawn yarn, its versatility to various yarn processing was low.

[0004] Also, many attempts have been made to improve the feeling of heat and color by using two kinds of polymers having different dyeing properties. For example, Japanese Patent Application Laid-Open No. 49-72485 discloses a method in which two kinds of yarns spun by spinning and blending are entangled and then heated to obtain a mixed fiber.
Japanese Patent No. 116708 discloses a method of using two types of polymers having different dyeing properties to obtain a mixed fiber of a single component yarn and a core-sheath composite yarn. Further, Japanese Patent Application Laid-Open No. 9-241938 discloses a method. A method is disclosed in which yarns having different dyeing properties are spun from adjacent spinning and stretching apparatuses, and each is separately drawn without being once wound up, and then combined to obtain a mixed fiber. Although it is possible to obtain mixed yarns with different dyeing properties by these proposals, quality instability occurs due to the occurrence of tarmi during drawing, and it is necessary to equip a new spinning and drawing device, resulting in enormous costs. Is required. Further, when the mixed fiber is applied to various kinds of yarn processing, 2
The drawn yarn obtained by the process method is costly,
Even when the stretching is directly connected, the versatility in yarn processing and the color development are reduced.

Japanese Patent Application Laid-Open No. 7-34341 proposes a method in which fibers having different cross-sectional shapes are mixed at the time of spinning to form inter-fiber voids, and the voids exhibit capillary action to improve water absorption. It is proposed in Japanese Patent Publication No. Certainly, by using the mixed fiber obtained by this proposal, the functionality such as water absorbency can be improved, but since it is composed of a single polymer, it gives a swelling feeling and a feeling of heat by various yarn processing. It was not possible to sufficiently improve the properties such as color and color development.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to achieve high thread processing and high versatility in high-order processing, which cannot be achieved by the above-mentioned prior art, as well as swelling feeling, heat feeling, coloring,
It is an object of the present invention to provide a polyester blended undrawn yarn which can improve texture such as dry feeling, water absorption and resilience.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polyester blended undrawn yarn composed of two kinds of filaments consisting of a copolymerized polyester and a non-copolymerized polyester, which satisfy the following characteristics. This can be achieved by using a polyester-based mixed fiber undrawn yarn. (1) Mixed ratio of filament group composed of copolymerized polyester: 30 to 70% (2) Elongation at break (E): 100% or more and 200% or less (3) Difference in elongation at break (ΔE): 0% or more 20% or less Here, the breaking elongation difference (ΔE) is determined by the following equation.

ΔE (%) = [(Ea−Eb) / Eb] × 1
00 Ea: Elongation at break of filament group made of copolymerized polyester (%) Eb: Elongation at break of filament group made of non-copolymerized polyester (%) (4) Number of confounds (CF): 2 to 10 / m In the present invention, more preferably, a polyester-based unstretched yarn in which at least one kind of filament group has an irregular cross section can be employed.

[0009] More preferably, it is a polyester blended undrawn yarn in which the filament group having the highest degree of irregularity has a sectional irregularity (M) of 1.3 to 3.0.

[0010] It is also preferable that the filament group having the smallest irregularity is formed of a copolyester.

The copolymerized polyester used in the present invention preferably has a copolymerization amount of 1.5 mol% or more and 12 mol% or less.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

It is necessary that the unstretched yarn of the polyester mixed fiber of the present invention is composed of two kinds of filaments consisting of a copolymerized polyester and a non-copolymerized polyester.
By composing one kind of filament group that constitutes the polyester-based undrawn yarn with copolymerized polyester,
It is possible to impart a difference in shrinkage characteristics or dyeability between the filament groups, and thereby, by various kinds of yarn processing in high-order processing, the swelling feeling, heat feeling, coloring property, dry feeling, water absorption, which are the objects of the present invention. It is possible to improve the texture characteristics such as resilience and resilience. Further, the copolymerization amount is more preferably 1.5 mol% or more and 12 mol% or less as the copolymerized polyester in order to achieve both yarn processability and feeling characteristics. The copolymerization amount is preferably 1.5 mol% or more in order to sufficiently exhibit the texture properties aimed at by the present invention, that is, swelling feeling, heat feeling, coloring, dry feeling, water absorption, rebound feeling, and the like. preferable. On the other hand, the amount of copolymerization is preferably 12 mol% or less in order to suppress the yarn processability due to the lowering of the melting point due to the copolymerization and perform the yarn processing stably.

Examples of the copolymerization component include aromatic dicarboxylic acids, aliphatic dicarboxylic acids, aliphatic diols, alicyclic diols, aromatic diols and the like in order to improve the shrinkage property, that is, to increase the shrinkage. Polymer diols and the like to which ethylene oxide or the like is added can be preferably used, and specifically, isophthalic acid,
Adipic acid, naphthalene-2,6-dicarboxylic acid, sebacic acid, 1,4-butanediol, diethylene glycol, trimethylene glycol, cyclohexanediol, bisphenol A, bisphenol sulfone, EO adduct of bisphenol A, EO adduct of bisphenol sulfone And the like can be preferably used. Of course,
The copolymerization component is not limited to one type, and two or more types may be used in combination.

Further, in order to improve the dyeability, aromatic dicarboxylic acid components having a sulfonic acid group and derivatives thereof, aromatic dicarboxylic acid components having a phosphoric acid group and derivatives thereof, etc., are mentioned as copolymer components. Among them, an aromatic dicarboxylic acid component having a sulfonic acid group and a derivative thereof are preferable. Specifically, 5-sodium sulfoisophthalic acid, 5-sodium sulfoterephthalic acid, 5
-Potassium sulfoisophthalic acid, 5-potassium sulfoterephthalic acid, 5-lithium sulfoisophthalic acid, 3,5
Sodium di (carbo-β-hydroxyethoxy) benzenesulfonate, potassium 3,5-di (carbo-β-hydroxyethoxy) benzenesulfonate, lithium 3,5-di (carbo-β-hydroxyethoxy) benzenesulfonate Dimethyl 5-sodium sulfoisophthalate, dimethyl 5-potassium sulfoisophthalate, dimethyl 5-lithium sulfoisophthalate, and the like can be preferably used. Further, polyethylene glycol or the like may be used in combination.

Further, two or more of the above-mentioned copolymer components may be used in combination in order to simultaneously improve shrinkage characteristics and dyeability.

The preferable copolymerization amount for improving the shrinkage characteristics and the dyeability is 7 mol% or more and 12 mol% or less when the shrinkage characteristics are improved. By setting the copolymerization amount to 7 mol% or more, sufficient shrinkage characteristics can be obtained. On the other hand, when the dyeing property is improved, the content is 1.5 mol% or more and 5 mol% or less. By increasing the copolymerization amount, the dyeability improving effect is improved, but on the contrary, the mechanical properties may be lowered. Therefore, in order to achieve both the dyeability improving effect and the mechanical properties, the copolymerization amount is 5%. It is preferably at most mol%.

In addition, if necessary, inorganic fine particles and organic compounds can be added as matting agents, deodorants, flame retardants, yarn friction reducing agents, antioxidants, coloring pigments and the like.

It is preferable that at least one filament group of the unstretched polyester-based mixed fiber of the present invention has an irregular cross section. By forming at least one kind of filament group into a modified cross section, voids can be formed between the single fibers, and the void formation can improve lightness, resilience, and water absorption. In order to exhibit such an effect, the cross-sectional shape of at least one kind of filaments constituting the polyester-based mixed undrawn yarn of the present invention is multi-lobed, cross-shaped, cross-shaped, W-shaped, S-shaped, It is preferable to have an irregular cross section such as an X shape, a flat shape, an elliptical shape, and a hollow shape.

When a filament having a hollow cross section is used for at least one kind of filament group and a filament having a round cross section is used for another filament group, the above-mentioned void forming property between the single fibers is all round. Although this is almost the same as the case where a filament having a cross section is used, the effect of imparting a lightweight feeling by hollowing and an effect of improving a resilience by improving bending rigidity are exhibited, and a good texture can be obtained as a cloth for clothing.

When a hollow cross-section filament is used for at least one kind of filaments constituting the polyester blended undrawn yarn of the present invention, the hollow ratio is required to sufficiently exhibit the above-mentioned effect of improving lightness and resilience. Is preferably 5 to 50%. The hollow ratio is preferably 5% or more in order to sufficiently exhibit the effect of improving the lightness and resilience by hollowing. However, when the hollow ratio exceeds 50%, the hollow portion is easily crushed, and the above effects may not be sufficiently exhibited. The preferred range of the hollow ratio is 10 to 40%.

The measurement of the hollow ratio is performed by the following method.

After the hollow cross-section filament is cut at a thickness of 5 μm in the cross-sectional direction of the fiber, a cross-sectional photograph is taken with an optical microscope, and the fiber outer diameter area S1 and the hollow area S2 are measured. Calculation is performed for each single filament, and the average value is defined as the hollow ratio.

Hollow ratio (%) = (S2 / S1) × 100 When the cross-sectional shape of at least one kind of filaments constituting the polyester-based mixed undrawn yarn of the present invention is other than the hollow cross-section, the shape is as follows. Is a multi-lobed,
Cross-shaped, cross-girder, W-shaped, S-shaped, X-shaped, flat, elliptical and the like, among which, among others, the effect of improving the water absorption by forming voids between fibers and imparting a dry feeling by forming an irregular cross section,
From the viewpoint of the effect of improving the resilience, the degree of irregularity (D / d) obtained by dividing the diameter (D) of the circumscribed circle of the fiber cross section by the diameter (d) of the inscribed circle of the fiber cross section is 1. It is preferably in the range of 3 to 3.0. In order to sufficiently exhibit the above-described effects, it is preferable that the degree of irregularity of the cross section is large, and the degree of irregularity is 1.3.
It is preferable to make the above. However, if the degree of irregularity is too large, problems such as fibrillation may occur, resulting in poor weaving. Therefore, in order to maintain weaving, the degree of irregularity of the cross section is preferably 3.0 or less. In the present invention, the preferable range of the degree of irregularity is 1.5 to 2.5.

The irregularity (D / d) defined in the present invention
Is calculated by the following method.

After cutting the irregularly shaped filament at a thickness of 5 μm in the cross-sectional direction of the fiber, a cross-sectional photograph is taken with an optical microscope, and the diameter (D) of the circumscribed circle of the fiber cross-section and the diameter of the inscribed circle of the fiber cross-section (D) is measured, the irregularity is calculated for each single filament by the following formula, and the average value is defined as the irregularity.

Degree of irregularity = D / d Of course, in the irregular cross-section such as the above-mentioned multi-leaf, cross, cross-girder, W-shape, S-shape, X-shape, flat-shape, elliptical shape, at least one fiber cross-section It is also effective to provide a hollow section having a hollow portion to improve the lightness. In this case, the inscribed circle of the fiber cross section in the present invention means an inscribed circle on the assumption that no hollow portion exists in the fiber.

The unstretched yarn of the polyester blend of the present invention is
It is preferable that at least one kind of filament group has an irregular cross-sectional shape other than the round cross-section so that effects such as water absorption, tension and waist, and lightness can be further improved. It doesn't matter. More preferably, the filament group having the smallest degree of irregularity among the filament groups constituting the polyester blended undrawn yarn is preferably formed of a copolymerized polyester.

The filament denier of the filament group constituting the polyester blended undrawn yarn of the present invention may be the same or different. However, when the single yarn fineness differs, the ratio of the single yarn fineness is preferably 3 times or less. When the ratio of the single yarn fineness is more than three times, the single filaments of the filament group having a small single yarn fineness mesh with each other between the fibers,
The formability of the inter-fiber voids may be reduced, resulting in reduced performance such as light weight and water absorption.

The unstretched yarn of the polyester blended fiber of the present invention is a filament made of a copolyester in order to sufficiently exhibit the effects such as a swelling feeling and a mood feeling obtained by blending a filament group made of a copolyester. It is necessary to set the mixing ratio of the group to 30 to 70%. If the blending ratio of the filament group composed of the copolymerized polyester is less than 30%, the above-mentioned effect of the present invention cannot be sufficiently exhibited, and if it exceeds 70%, the effect expression is good. Since fluff is likely to occur, the processability in yarn processing and the like is reduced.

The elongation at break of the polyester blended undrawn yarn of the present invention is from 100% to 200% in view of the quality stability of the undrawn yarn, versatility and stability of yarn processing, and the like. It is necessary to be. When the elongation at break is less than 100%, a sufficient effect may not be obtained depending on the applied yarn processing method. For example, when applied to so-called thick processing, the effect of providing a feeling of heat and dry feeling due to thinning cannot be sufficiently exhibited. On the other hand, when the elongation at break exceeds 200%, instability of yarn processing, quality variation, and the like occur due to changes in physical properties of the undrawn mixed fiber yarn over time. A preferred range of the elongation at break is from 120% to 180%.

Further, the breaking elongation Ea (%) of the filament group composed of the copolyester constituting the undrawn polyester-based fiber of the present invention and the breaking elongation Eb (%) of the filament group composed of the non-copolyester are It is necessary that the difference in the elongation at break (ΔE) is 0% or more and 20% or less. The difference in elongation at break (ΔE) is calculated by the following equation.

ΔE (%) = [(Ea−Eb) / Eb] × 100 Usually, when a plurality of yarns having a difference in elongation are wound in an undrawn state, the breaking defined in the present invention is required. Irrespective of the value of the elongation difference (ΔE), there is no occurrence of bulging at the time of winding, and it is possible to wind with a clean package.
However, in the case where the unstretched mixed yarn having a difference in elongation at break is supplied to various yarn processing steps, if the difference in elongation at break is excessively large, threading occurs due to yarn processing, and the quality and workability are remarkably high. It will fall. For example, in the case of feeding for normal stretching, a difference in elastic recovery occurs immediately after stretching, a large thickness is generated, the product quality is significantly reduced, and yarn breakage due to defective release occurs frequently when feeding to the weaving process, The weavability is reduced.

In order to suppress the occurrence of the above-mentioned tarumi when supplied to various types of yarn processing, and to prevent the yarn processing property, the process passability, and the product quality from deteriorating, the breaking elongation of the polyester-based mixed undrawn yarn of the present invention. The rate difference (ΔE) needs to be 20% or less. More preferably, the difference in elongation at break (ΔE) is 1
5% or less.

The breaking elongation Ea (%) of the group of filaments made of the copolymerized polyester constituting the unstretched yarn of the polyester mixed fiber of the present invention is the breaking elongation Eb (%) of the group of filaments made of the non-copolymerized polyester. It is necessary that the elongation at break is equal to or high, that is, the difference in elongation at break (ΔE) is 0% or more. More preferably, the difference in elongation at break (ΔE) is 3% or more.

The difference in elongation at break (ΔE) is less than 0%, that is, the elongation at break Ea (%) of the filament group made of the copolymerized polyester is smaller than the elongation at break Eb (%) of the filament group made of the non-copolymerized polyester. If the elongation is low, the filament group consisting of the copolymerized polyester breaks during the yarn processing, thereby reducing the yarn processability or the product quality.

In addition, the unstretched polyester blended yarn of the present invention must be entangled in order to improve the processability in various yarn processing and to maintain the quality stability. The number (CF) needs to be in the range of 2 to 10 pieces / m. If the number of confounds is less than 2 / m,
The convergence-improving effect of the confounding is hardly observed, and good processability cannot be obtained. On the other hand, when the number of entanglements exceeds 10 / m, the processability by the entanglement becomes very good, but the filament group consisting of the copolyester constituting the polyester-based non-stretched yarn and the non-copolymer polyester. Since the filament groups are uniformly mixed, the effects and effects of the present invention, that is, the purpose and effect of the present invention, such as a swelling feeling and a feeling of heat, cannot be sufficiently exhibited.

The confounding number (CF) is measured by the method disclosed in Japanese Patent Application Laid-Open No. 48-28708.

As a method for producing the polyester-based mixed fiber undrawn yarn of the present invention, a so-called spinning fiber mixture method can be used. As a spinning fiber mixing method, two different
One method is to simultaneously produce different types of polymers and the other is to produce single-component polymers from separate spinnerets, then combine and wind them when winding. To make it 1
A preferred method is to spin two different polymers simultaneously from one spinneret.

The undrawn polyester-based mixed fiber of the present invention is
Although it is possible to use the undrawn yarn as it is, by applying it to various high-order processing, it is possible to improve texture characteristics such as swelling feeling, heat feeling, coloring, dry feeling, water absorption, and resilience. Examples of the high-order processing method include ordinary stretching, so-called thick and thin stretching, and relaxation heat treatment. Further, it is also preferable to apply a higher-order processing such as air processing or false twisting. These higher processing techniques may be applied to the polyester blended undrawn yarn of the present invention alone, or may be subjected to composite processing with another yarn.

The polyester blended undrawn yarn of the present invention can be applied to the above-mentioned various high-order processing techniques to obtain a swelling feeling, heat feeling, coloring, dry feeling, water absorption, It is possible to improve the feeling characteristics such as resilience.

Also, in the case of manufacturing a woven or knitted fabric using a processed yarn obtained by applying a high-order processing technology to the polyester blended undrawn yarn of the present invention, there are no restrictions on the weaving machine, the woven or knitted structure, etc. By using it at least in part, it is possible to produce a good woven or knitted fabric having the swelling feeling, heat feeling, dry feeling, resilience, coloring, water absorption, and the like, which are the objects of the present invention.

[0043]

The present invention will be described in more detail with reference to the following examples. Each characteristic value in the examples was obtained by the following method.

A. Yarn processability Evaluated from the state of occurrence of thread breakage and tarmi when 300 unstretched yarns were thread-processed, and a thread breakage and tarmi occurrence rate of less than 5% was regarded as acceptable.

B. Feeling characteristics (softness, heat feeling, resilience, dryness, light weight, color development) For each item, a sensory test was performed by comparing the sample with a reference sample, and evaluated on a 4-point scale. Then, they were comprehensively evaluated, and “very excellent” was represented by ○, “excellent” was represented by ○, “normal” was represented by Δ, and “inferior” was represented by ×. For the reference sample, an undrawn yarn made of a single-filament fineness of 4 dtex × 36 fil made of polyethylene terephthalate and having a round cross-section yarn was processed in the same manner as in the example, and woven and woven in the same manner as in the above sample.
The processed one was used, and was evaluated as "poor". Examples 1 to 4 and Comparative Examples 1 and 2 Copolymerized polyester having 2.05 mol% of 5-sodium sulfoisophthalic acid and having an intrinsic viscosity (η) of 0.65 and an intrinsic viscosity (η) of 0.63 Polyethylene terephthalate containing 0.30% by weight of TiO ₂ was spun at a spinning temperature of 290 ° C. using an ordinary composite spinning machine. 18 polymerized polyester filament groups
After discharging from the 6-leaf cross-section discharge hole of the hole, spinning was performed with the spinning speed changed as shown in Table 1, and confounding was applied at a pressure and air pressure of 0.3 MPa with an interlace nozzle, and then 150 dtex-36fi
l undrawn yarn was wound up.

Table 1 shows the properties of the obtained undrawn yarn.

The unstretched mixed fiber obtained was stretched at a stretching ratio of 90% of the natural stretching ratio of the unstretched yarn using a usual hot roll-hot plate stretching machine to obtain a thick and thin yarn. . Using the obtained thick and thin drawn yarns for warp and weft, a plain fabric is produced, scoured with hot water at 98 ° C, then set at 170 ° C for dry heat, and further with a 2.5% aqueous solution of sodium hydroxide at 98 ° C. Treat (weight loss processing) for 20 minutes, then dye at 130 ° C (moist heat), 170 dry heat
Finish setting was performed at ° C. Table 1 shows the results of evaluating the obtained woven fabric characteristics.

In Examples 1 and 2, the woven fabric obtained was excellent in yarn workability, and had a dry feeling and heather feeling that had never existed before.

In Example 3, although the elongation at break of the unstretched mixed yarn was slightly high, the processability of the unstretched yarn with the passage of time slightly progressed, so that the yarn workability was slightly lowered. The feeling was excellent.

In Example 4, the yarn processability was good,
Since the elongation at break of the mixed fiber undrawn yarn was slightly low, the sense of heather was somewhat inferior, but the fabric was excellent in dryness.

On the other hand, in Comparative Example 1, since the elongation of the undrawn yarn was too large, the processability of the undrawn yarn was deteriorated due to the aging of the undrawn yarn, and it was difficult to perform stable processing.

Further, in Comparative Example 2, the copolyester filament group had a low elongation, and as a result, a large amount of tarmi occurred during yarn processing, and the yarn processability was extremely low.

[0053]

[Table 1] Examples 5 and 6 and Comparative Examples 3 and 4 Using a copolymerized polyester having an intrinsic viscosity (η) of 0.67 obtained by copolymerizing 3.5% by mole of 5-sodium sulfoisophthalic acid, a non-copolymerized polyester filament group was used. Spinning was carried out in the same manner as in Example 1 except that the shape of the discharge hole was changed to an 8-leaf cross section, and as shown in Table 2, the composite ratio was changed to 150 dtex-36fi.
l undrawn yarn was wound up.

Table 2 shows the properties of the obtained undrawn yarn.

The obtained untwisted yarn is drawn at a normal draw ratio, and then subjected to composite false twisting with a polyester drawn yarn of 50 dtex-12fil so that the undrawn yarn becomes a sheath yarn. Yarn was obtained.

The obtained processed yarn was twisted at 700 t / m and used for warp and weft to prepare a plain woven fabric, and a woven fabric was obtained in the same manner as in Example 1.

In Example 5, the workability was also very good, and the obtained woven fabric had an unprecedented soft feeling, repulsion feeling,
The fabric had a feeling of heather and was excellent in dryness and lightness due to the irregular cross-section filament.

In Example 6, since the difference in the elongation at break was slightly large, a slight thickening occurred at the stage of drawing the undrawn yarn, and the workability of the yarn was slightly reduced by the thickening. The woven fabric had an unprecedented softness, resilience and heather feeling, and was excellent in dryness and lightness.

On the other hand, in Comparative Example 3, since the non-copolymerized polyester filament group had a high breaking elongation, a large number of thickenings were generated at the stage of drawing the undrawn yarn, and the yarn processability was extremely poor. Was.

In Comparative Example 4, the breaking elongation difference ratio was very large, and since the mixing ratio of the copolymerized polyester filament group was too high, single yarn breakage and fluffing occurred frequently during yarn processing, and the yarn processability was high. Was significantly lower.

[0061]

[Table 2] Examples 7 to 11 and Comparative Example 5 5.5 mol% of isophthalic acid and E of bisphenol A
A copolymerized polyester having an intrinsic viscosity (η) of 0.66 obtained by copolymerizing an O adduct with 4.0 mol% and an intrinsic viscosity (η) of 0.
Using polyethylene terephthalate containing 0.04% by weight of 63 SiO ₂ , spinning was performed at a spinning temperature of 290 ° C. using an ordinary composite spinning machine. The non-copolymerized polyester filament group was discharged from 18 holes having different cross-sectional shapes as shown in Table 3, and spun at a spinning speed of 3000 m / min.
After confounding at 5 MPa, an undrawn yarn of 150 dtex-36 fil was wound up.

Table 3 shows the properties of the obtained undrawn yarn.

The obtained unwoven mixed fiber yarn is subjected to ordinary stretching by adjusting the draw ratio so that the breaking elongation is 45% using a usual hot roll-hot plate stretching machine to obtain a mixed fiber drawn yarn. Was.

The obtained mixed fiber drawn yarn was subjected to sweet twisting with a twist number of 250 t / m, and a plain woven fabric was produced using the warp and the weft. A woven fabric was obtained in the same manner as in Example 1.

In Example 7, the yarn processability was excellent, and the obtained woven fabric had unprecedented softness, resilience, and coloring, and also had excellent dryness and lightness due to the irregularly shaped filament. , A luxurious fabric.

In Example 8, since the difference in elongation at break was slightly low, a small amount of tarmi was observed in the group of copolymerized filaments during stretching, and the yarn processability was slightly inferior. The resilience, dryness, and lightness were slightly lower than those of Example 7, but were superior in softness and color development as compared with the conventional one.

In Example 9, the yarn processability was good, and it had unprecedented softness, resilience, and coloring, and was excellent in dryness due to the irregularly shaped filament. Fibrillation had occurred because the irregularity of the cross-sectional filament was slightly higher.

In Example 10, the yarn processability was good, the softness was excellent, and the hollow cross-section filament was excellent in resilience and lightness.

In Example 11, although the softness and the color development were unprecedented, the irregularity of the irregularly-shaped cross-section filament was slightly large, and the dryness, lightness and rebound were slightly reduced.

On the other hand, in Comparative Example 5, thickening occurred frequently during stretching, and the yarn processability was remarkably inferior. In the obtained woven fabric, since all the filaments had a round cross section, the feeling of rebound was somewhat insufficient. It was inferior in dryness and lightness.

[0071]

[Table 3] Examples 12 and 13 and Comparative Examples 6 and 7 Spinning was performed in the same manner as in Example 1 except that the copolymerization amount of the copolymerized polyester was changed as shown in Table 4.
Yarn processing and weaving were performed to obtain a woven fabric. In Comparative Example 7, a polyester that was not copolymerized was used for the copolymerized filament group.

In Example 12, the yarn processing was excellent.
Since the copolymerization amount of the copolymerized polyester was slightly small, the sense of heather was somewhat unclear, but the fabric had an unprecedented dry feeling.

In the case of Example 13, the fabric filament had a slightly low elongation difference due to a slightly low tensile elongation due to a slight reduction in the elongation at break due to a slight reduction in elongation. Met.

On the other hand, in Comparative Example 6, the filaments were frequently generated in the group of copolymerized filaments during yarn processing, and the yarn processability was extremely poor. In addition, the obtained woven fabric had a dry feeling and a feeling of heather, but the deterioration of the copolymerized polyester due to weight loss processing progressed,
The mechanical properties were inferior.

Comparative Example 7 was a mixed fiber made of polyethylene terephthalate, and the difference in elongation at break was within the range of the present invention. However, although it was slightly inferior and had a dry feeling, it was not possible to obtain a heather feeling, and only those in the same category as conventional products were obtained.

[0076]

[Table 4] Examples 14 to 16 and Comparative Example 8 In Example 7, the copolymerization amount of the EO adduct of bisphenol A was 4.0 mol% as the copolymerized polyester,
Table 5 shows the copolymerization amount by variously changing the copolymerization amount of isophthalic acid.
In the same manner as in Example 7, spinning, yarn processing and weaving were carried out to obtain a woven fabric, except for the changes as shown in Table 7.

In Example 14, a woven fabric excellent in yarn processability and excellent in softness and coloring was obtained, but the difference in shrinkage was slightly insufficient because the copolymerization amount of the copolymerized polyester was slightly small. The feeling of rebound and dryness was slightly inferior.

In Examples 15 and 16, the yarn processability was very good, and the obtained woven fabric had an unprecedented softness.
It was a woven fabric having a resilience, dryness, and coloring.

On the other hand, in Comparative Example 8, the copolymerization amount of the copolymerized polyester was large and the elongation was small, so that fusion occurred in the yarn processing, resulting in lack of processing stability and the occurrence of tarumi, and the yarn workability was significantly reduced.

[0080]

[Table 5] Examples 17 and 18 and Comparative Examples 9 and 10
Spinning, yarn processing and weaving were carried out in the same manner as in Example 1 except for the modification as described above to obtain a woven fabric. In Example 19 and Comparative Example 10, the second interlace nozzle was installed in a 3% relaxed state before winding, and two-stage confounding was applied.

In Examples 18 and 19, the yarn processability was good, and the obtained woven fabric was a luxurious woven fabric having an unprecedented dry feeling and heather feeling.

On the other hand, in Comparative Example 9, since the number of entanglements was too small, the convergence of the undrawn yarn was reduced, and fluffing and thickening occurred due to the breakage of the single yarn during yarn processing, resulting in poor yarn workability. Was.

In Comparative Example 10, the yarn processability was very good, but the number of entanglements was too large to give a clear feeling of heat, and the dryness of the single yarn was insufficient. Had also declined.

[0084]

[Table 6] Examples 19 to 21 and Comparative Example 11 In Example 10, the fiber cross section of the non-copolymerized polyester filament group was set to a hollow cross section, and the hollow ratio was changed as shown in Table 7 to carry out spinning to obtain a mixed undrawn yarn. Obtained.

The untwisted yarn obtained was mixed at a false twist temperature of 100 ° C.
, And the obtained processed yarn was subjected to a sweet twist of 300 t / m, and a plain woven fabric was produced using the warp and the weft. A woven fabric was obtained in the same manner as in Example 10.

[0086] In Example 19, a slight scumming occurred during yarn processing, and the hollowness was rather low, so that the lightness and dryness were slightly insufficient. However, the obtained woven fabric was excellent in softness and coloring. Met.

In Example 20, no thread was formed during the yarn processing, and stable yarn processing was performed. However, the obtained woven fabric had a slightly low hollow ratio similarly to Example 19, and thus the lightness and dry feeling were slightly insufficient. It had excellent softness and coloring.

In Example 21, although the difference in the elongation at break was slightly large, tarling occurred at the time of yarn processing. However, the obtained woven fabric had a resilience, dryness, and lightness that were not found in the past.

On the other hand, in Comparative Example 11, since the hollow ratio was high, the difference in elongation at break was too large, yarn breakage and fluff occurred frequently during yarn processing, and the yarn processability was extremely low.

[0090]

[Table 7]

[0091]

According to the present invention, the yarn processability and versatility in high-order processing are excellent, and the feeling of swelling, the feeling of heather, the coloring property,
It is possible to obtain a polyester blended undrawn yarn which can improve the texture such as dry feeling, water absorption and resilience.

Claims (5)

[Claims] 1. A polyester blended undrawn yarn comprising two types of filaments consisting of a copolymerized polyester and a non-copolymerized polyester, wherein the polyester blended fiber satisfies the following characteristics. Undrawn yarn. (1) Mixed ratio of filament group composed of copolymerized polyester: 30 to 70% (2) Elongation at break (E): 100% or more and 200% or less (3) Difference in elongation at break (ΔE): 0% or more 20% or less Here, the elongation difference at break (ΔE) is determined by the following equation. ΔE (%) = [(Ea−Eb) / Eb] × 100 Ea: Elongation at break of filament group made of copolymerized polyester (%) Eb: Elongation at break of filament group made of non-copolymerized polyester (%) ( 4) Number of confounds (CF): 2 to 10 pieces / m 2. The undrawn polyester blended yarn according to claim 1, wherein at least one filament group has an irregular cross section. 3. The polyester blended undrawn yarn according to claim 1, wherein the filament group having the highest degree of irregularity has a sectional irregularity (M) of 1.3 to 3.0. 4. The polyester blended undrawn yarn according to claim 1, wherein the filament group having the smallest degree of irregularity is formed of a copolymerized polyester. 5. The unstretched polyester blended yarn according to claim 1, wherein the copolymerization amount of the copolyester is from 1.5 mol% to 12 mol%.