JP2008231599A - Cation-dyeable hollow cross section polyester fiber and its use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new cation dyeable hollow cross section polyester filament which has dyed brilliance which general purpose polyesters filaments do not have, has more excellent strength and wear resistance than those of conventional cation-dyeable polyester filaments, and is excellent in a lightweight touch which is the defect of polyester filaments, and to provide a new blended polyester yarn which comprises the hollow modified cross section polyester filaments and can form well swollen woven or knitted fabrics. <P>SOLUTION: This cation dye-dyeable polyester filament comprises a modified polyester copolymerized with 0.1-6.0 mol% of a specific phosphonium sulfonate and having an intrinsic viscosity of ≥0.6, has a hollow single filament cross-sectional shape, and has a percentage of single hollowness of ≥5%. Composite filaments prepared by blending the cation dyeable hollow cross section polyester filaments with polyester filaments having a boiling water shrinkage percentage difference of 4-45% between the cation dyeable hollow cross section polyester filaments and the polyester filaments give a woven or knitted fabric having a good hand. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a novel polyester hollow cross-section yarn that can be dyed with a cationic dye, has excellent dyeing clarity, and that can improve the lightness in clothing applications, and a mixed yarn using the same It relates to the used woven or knitted fabric.

  Polyester fibers have been widely produced due to their mechanical strength suitable for efficient production and processing, color development after commercialization, and good manufacturing characteristics, and they have evolved to become representative of synthetic fibers. However, compared to natural fibers such as silk, hemp, wool, and cotton, which are often targeted for synthetic fibers, and other synthetic fibers, polyester fiber has a specific gravity that can be said to be a drawback. In apparel, there is a feeling of weight that is considered to be a poor representative texture of synthetic fibers, and various studies have been made to reduce the apparent specific gravity (weight per bulk) for improvement.

  Many methods have been proposed as a method for reducing the apparent specific gravity of the polyester fiber. A typical method is a method of hollowing out the cross-sectional shape of a single yarn. What is important when hollowing out the cross-sectional shape of a single yarn is a material that can reduce the properties of polyester raw materials, especially melt viscosity that affects spinning, mechanical strength during fabric formation, and hollow cracking due to heating during dyeing It has strength, and such a characteristic can be expressed by a numerical value represented by an intrinsic viscosity at the time of producing a polyester polymer.

  On the other hand, with the aim of improving the quality of textile products, improvement of dyeing property of polyester fibers has been studied conventionally. Since polyester is excellent in whiteness and transparency of a single fiber, it is widely known that the coloring property at the time of dyeing is relatively better than other synthetic fibers. However, in the dyeing process, contrary to the excellent mechanical properties of the fiber, it is difficult to obtain sufficient colorability by disperse dyeing under normal pressure, and high-pressure dyeing has become normal. In addition, with the diversification of polyester fiber products, there is a need for multiple colors other than pre-dyeing at the textile and / or fiber product stage. As a method for solving these problems, polyester polymers can be dyed with cationic dyes. Has been proposed (see Patent Documents 1 and 2 below).

  According to these methods, dyeing with a cationic dye is possible in a subsequent dyeing process, and a dyed product having excellent color development and sharpness compared to dyeing with a disperse dye can be obtained. It is also possible to dye different colors using fiber products containing fibers having different dyeing properties in the same bath with a cationic dye and a disperse dye.

  However, polyesters that can be dyed with cationic dyes (referred to as “cationic dyes” in the present invention) have a high melt viscosity due to ionic crosslinking of the copolymer, because the cationic dyeable components are copolymerized in the polymerization stage of the polymer. It becomes difficult to increase the degree of polymer polymerization. For this reason, it is necessary to finish and discharge the polymerization in a state in which the degree of polymerization is lower than that of the general-purpose polyester polymer due to the problem of the thickening effect and the facility tolerance limit. Polyester filaments obtained from these cationic dyeable polymers have a drawback that it is difficult to obtain the same strength as general-purpose polyester filaments due to their low degree of polymerization, and they can only be used within a limited range in clothing applications.

  On the other hand, the diversification of fashion in the apparel field has increased its role as an expression of individuality of consumers, and consumers have been demanding assertions of individuality especially in active situations. Specifically, in the fields of outdoor and sports clothing, the expression of individuality by vivid colors has come to be regarded as important in fashion, and a clear color different from general clothing has been demanded.

  In the background as described above, it has excellent lightness and texture that does not hinder movement in sports applications, etc., and has excellent mechanical strength and tensile strength and abrasion resistance in fabrics and textiles. In addition, it is desired to develop a cationic dyeable polyester hollow filament yarn that can withstand processing under severe processing conditions involving high temperature heating such as waterproofing, antifouling and UV cut processing.

Japanese Examined Patent Publication No. 3-79450 Japanese Patent Publication No.58-38550

  The present invention has been made in view of the above-mentioned background art, and the first object thereof is dyeing clarity not found in general-purpose polyester, strength and abrasion resistance superior to conventional cationic dyeable polyester fibers, and An object of the present invention is to provide a novel cationic dyeable polyester hollow cross-section yarn having improved lightness which is a drawback of polyester fibers. Another object of the present invention is to provide a blended yarn that can be formed into a woven or knitted fabric having a good swelling by combining such a cationic dyeable polyester hollow section yarn and a high shrinkage polyester fragment yarn.

  According to the present invention, the above-mentioned problems are achieved by the following cationic dyeable polyester hollow cross-sectional yarn, a blended yarn using the same, and a woven or knitted fabric using them.

［２］上記［１］のカチオン可染ポリエステル中空断面糸と該中空断面糸との沸水収縮率差が４〜４５％のポリエステルフィラメントとを引き揃え、混繊してなることを特徴とするカチオン可染ポリエステル混繊糸。
［３］上記［１］のカチオン可染ポリエステル中空断面糸及び／又は上記［２］のポリエステル混繊糸を構成糸として含むことを特徴とする織編物。 [1] A cationic dyeable polyester yarn comprising a modified polyester having an intrinsic viscosity of 0.6 or more obtained by copolymerizing 0.1 to 0.6 mol% of a sulfonic acid phosphonium salt represented by the following general formula (I): A cationic dyeable polyester hollow cross-sectional yarn, characterized in that the cross-sectional shape of the fiber single yarn is hollow and the hollow rate of the single yarn is 5% or more.

[2] A cation characterized in that the cationic dyeable polyester hollow cross-section yarn of [1] and a polyester filament having a boiling water shrinkage difference of 4 to 45% are aligned and mixed. Dyed polyester blended yarn.
[3] A woven or knitted fabric comprising the cationic dyeable polyester hollow cross-sectional yarn of [1] and / or the polyester blended yarn of [2] as constituent yarns.

  According to the hollow cross-section polyester filament yarn having cationic dyeability of the present invention, it has excellent dyeing colorability and strength, and can improve the feeling of lightness in the fabric state by hollowing out the single yarn cross-sectional shape, Moreover, it is possible to provide a fabric exhibiting a clear color excellent in tear strength and abrasion resistance. Moreover, according to the mixed yarn of the present invention, in addition to the above effects, a woven or knitted fabric with a good texture rich in swelling can be obtained.

  The polyester in the present invention is mainly a polyester whose main repeating unit is ethylene terephthalate. Such a polyester may be copolymerized with other components such as phthalic acid, adipic acid, sebacic acid, butylene glycol, trimethylene glycol, naphthalenedicarboxylic acid and the like as long as the object of the present invention is not impaired. . Moreover, you may mix | blend antioxidant, a ultraviolet absorber, a flame retardant, a fluorescent thickening agent, a matting agent, a color adjusting agent, an antifoamer, and other additives as needed.

  The cationic dyeable hollow cross-section polyester filament yarn of the present invention is composed of a modified polyester that can be dyed with a cationic dye copolymerized with a sulfonic acid quaternary phosphonium salt represented by the following general formula (I).

  In the modified polyester in the present invention, the sulfonic acid quaternary phosphonium salt represented by the above general formula (I) is copolymerized in an amount of 0.1 to 6.0 mol%, preferably 0.5 to 4.5 mol%. It is necessary to be.

  Preferred specific examples of the sulfonic acid quaternary phosphonium salt include tetrabutylphosphonium salt of 3,5-dicarboxybenzenesulfonic acid, ethyltributylphosphonium salt of 3,5-dicarboxybenzenesulfonic acid, and 3,5-dicarboxybenzenesulfone. Acid benzyltributylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid phenyltributylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid tetraphenylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid ethyltriphenylphosphonium salt, 3 , 5-Dicarboxybenzenesulfonic acid butyl triphenylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid benzyltriphenylphosphonium salt, 3,5-dicarbomethoxybenzenesulfone Tetrabutylphosphonium salt, 3,5-dicarbomethoxybenzenesulfonic acid ethyl tributylphosphonium salt, 3,5-dicarbomethoxybenzenesulfonic acid benzyltributylphosphonium salt, 3-carbomethoxybenzenesulfonic acid tetrabutylphosphonium salt, 3-carbohydrate Methoxybenzenesulfonic acid tetraphenylphosphonium salt, 3,5-di (β-hydroxyethoxycarbonyl) benzenesulfonic acid tetrabutylphosphonium salt, 3,5-di (β-hydroxyethoxycarbonyl) benzenesulfonic acid tetraphenylphosphonium salt, 3 -(Β-hydroxyethoxycarbonyl) benzenesulfonic acid tetrabutylphosphonium salt, 3- (β-hydroxyethoxycarbonyl) benzenesulfonic acid tetraphenylphosphonium salt, Examples thereof include 4-hydroxyethoxybenzenesulfonic acid tetrabutylphosphonium salt, 2,6-dicarboxynaphthalene-4-sulfonic acid tetrabutylphosphonium salt, and α-tetrabutylphosphonium sulfosuccinic acid. The sulfonic acid phosphonium salts may be used alone or in combination of two or more.

  In order to copolymerize the sulfonic acid quaternary phosphonium salt with the polyester, it is added at any stage before the completion of the synthesis of the polyester described above, preferably at any stage before the completion of the first stage reaction. That's fine.

  The proportion of the sulfonic acid quaternary phosphonium salt copolymerized with the polyester is suitably in the range of 0.1 to 6.0 mol% with respect to the bifunctional carboxylic acid component (excluding the sulfonate) constituting the polyester. In particular, the range of 0.5 to 4.5 mol% is preferable. When the copolymerization ratio is less than 0.1 mol%, the dyeability of the resulting copolymerized polyester with respect to the cationic dye tends to be insufficient, and when it exceeds 6.0 mol%, the dyeability with the cationic dye is no longer significantly improved. On the contrary, the physical properties of the polyester fiber are lowered, so that it is difficult to produce a good hollow cross-section yarn, and it is difficult to achieve the object of the present invention.

  In the present invention, when the modified polyester is produced, a small amount of the sulfonic acid tertiary phosphonium salt represented by the following general formula (II) is used together with the sulfonic acid quaternary phosphonium salt represented by the general formula (I). The decomposition reaction in the polymerization process is suppressed, and the resulting modified polyester and the color tone of the resulting polyester are extremely preferable.

  In the general formula (II), B is defined in the same manner as A in the general formula (I) and represents a trivalent aromatic group or an aliphatic group, and among them, an aromatic group is preferable. X3 represents an ester-forming functional group in the same manner as X1 in the general formula (I), and specific examples thereof include a carboxyl group or a derivative thereof. X4 represents an ester-forming functional group or a hydrogen atom that is the same as or different from X3, similarly to X2 in the general formula (I), and is preferably an ester-forming functional group. R5, R6 and R7 represent the same or different groups selected from the group consisting of an alkyl group and an aryl group, respectively, similarly to R1, R2 and R3 in the general formula (I). N is a positive integer.

  Preferable specific examples of the sulfonic acid tertiary phosphonium salt include tributylphosphonium salt of 3,5-dicarboxybenzenesulfonic acid, triethylphosphonium salt of 3,5-dicarboxybenzenesulfonic acid, triethylphosphonium salt of 3,5-dicarboxybenzenesulfonic acid. Propylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid triphenylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid tribenzylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid trihexylphosphonium salt, 3,5- Examples thereof include dicarboxybenzenesulfonic acid trioctylphosphonium salt and 3,5-dicarboxybenzenesulfonic acid tricyclohexylphosphonium salt.

  If the amount of the sulfonic acid tertiary phosphonium salt is too small, the effect of preventing the modified polyester from being colored yellow-brown is insufficient. Since the heat resistance may be deteriorated, the range of 0.5 to 10 mol% is suitable with respect to the sulfonic acid quaternary phosphonium salt, and the range of 1 to 4 mol% is particularly preferable. The sulfonic acid tertiary phosphonium salt may be added at any stage before the synthesis of the polyester is completed in the same manner as the sulfonic acid quaternary phosphonium salt. May be added separately. In the production stage of the sulfonic acid quaternary phosphonium salt, a sulfonic acid tertiary phosphonium salt may be by-produced and partially remain in the produced sulfonic acid quaternary phosphonium salt. In this case, if the amount of the remaining sulfonic acid tertiary phosphonium salt is controlled within the above range by controlling the purification conditions, it may not be added separately.

  In the present invention, it is preferable to add a quaternary onium salt in producing the modified polyester. Examples of such quaternary onium salts include quaternary ammonium salts and quaternary phosphonium salts. Specifically, quaternary ammonium salts include tetramethylammonium hydroxide, tetramethylammonium chloride, and tetraethylammonium hydroxide. , Tetraethylammonium chloride, tetraethylammonium bromide, tetraethylammonium iodide, tetrapropylammonium hydroxide, tetrapropylammonium chloride, tetraisopropylammonium hydroxide, tetraisopropylammonium chloride, tetrabutylammonium hydroxide, tetrabutylammonium chloride, hydroxylated Examples include tetraphenylammonium and tetraphenylammonium chloride. Examples of the quaternary phosphonium salt include tetra-n-butylphosphonium bromide.

  If the amount of the quaternary onium salt used is too small, the effect of improving the heat resistance becomes insufficient. On the other hand, if the amount is too large, the heat resistance deteriorates. There is a tendency to color brown. Therefore, the amount of the quaternary onium salt used is preferably in the range of 0.1 to 20 mol%, particularly preferably in the range of 1 to 10 mol%, based on the total amount of the sulfonic acid phosphonium salt.

  The quaternary onium salt may be added at any stage until the synthesis of the polyester is completed. For example, the quaternary onium salt may be added to the polyester raw material or during the first stage reaction. It may be added after the end of the stage reaction until the start of the second stage reaction or during the second stage reaction.

  The addition order of the quaternary onium salt and the sulfonic acid phosphonium salt may be arbitrary, and may be added after mixing both in advance. Further, in the production of the phosphonium sulfonate, a synthesis method by reaction of a quaternary phosphonium salt such as a quaternary phosphonium halide and a sulfonic acid metal salt may be employed, in which case the quaternary phosphonium salt of the raw material is used. It may remain in the phosphonium salt of sulfonic acid that is a reaction product. In such a case, it is not necessary to newly add a quaternary phosphonium salt, and this remaining quaternary phosphonium salt can be used.

  In the present invention, the intrinsic viscosity of the modified polyester (measured with a 25 ° C. orthochlorophenol solution) is 0.60 or more, preferably 0.64 to 0.80. In particular, the intrinsic viscosity affects the strength of the hollow cross-section filament yarn, and if it is less than 0.60, sufficient yarn strength cannot be obtained. In order to obtain sufficient abrasion resistance for general-purpose use including sports clothing and filament strength at a level that expresses tearing strength, the intrinsic viscosity needs to be 0.64 or more at the polymer stage of the raw material for yarn production. . In particular, if the intrinsic viscosity is 0.64 or more, in the processing step after yarn production and weaving, it exhibits excellent sharpness by dyeing and processing stability without hollow cracks by dyeing, and at the same time wear resistance and tearing A fabric excellent in strength can be obtained.

  Regarding the hollow cross-section of the cationic dyeable polyester hollow cross-section yarn of the present invention, it is sufficient to satisfy that the single yarn cross-section is hollow and the single yarn hollow ratio is 5% or more. In particular, the hollow ratio of the single yarn is preferably in the range of about 20 to 45%, but within the range of 5% or more as long as the strength, lightness, abrasion resistance and tear strength of the fabric are not impaired. Can be selected as appropriate.

  The cationic dyeable polyester hollow cross-section yarn of the present invention can be used alone, but is particularly suitable for producing a mixed yarn by aligning the hollow cross-section yarn with a high shrinkage polyester yarn having a different boiling water shrinkage rate. Useful.

  When producing a blended yarn by aligning with a high shrinkage yarn having a different boiling water shrinkage from the cationic dyeable polyester hollow cross-section yarn of the present invention, the boiling water shrinkage of the high shrinkage yarn and the cationic dyeable hollow cross-section polyester filament of the present invention The difference is 4 to 45%, preferably 8 to 35%. If the difference in boiling water shrinkage is less than 4%, it is difficult to fully express the desired texture, particularly the feeling of swelling, and particularly after the formation of the fabric due to the high bending rigidity of the cationic dyeable polyester hollow cross-sectional yarn of the present invention. It is not possible to develop a sufficient difference in the thread foot. On the other hand, when the boiling water shrinkage difference exceeds 45%, shrinkage spots appear on the fabric surface due to abrupt shrinkage during the processing of the high shrinkage yarn, and the fabric quality may be significantly lowered. This becomes a technical problem including condition adjustment in a post-processing step after the formation of a later production machine.

In the present invention, the blend ratio is not particularly limited, and the total fineness ratio of the cationic dyeable hollow cross-section yarn / high-shrinkage polyester yarn is appropriately selected according to the use of the blended composite yarn.
As long as the above conditions are satisfied, the method for producing the blended yarn is not particularly limited, and a conventionally known method can be arbitrarily adopted. For example, what is necessary is just to carry out the mixed fiber entanglement of those filaments which used the general fiber mixing apparatus shown by FIG. 1 using the air entanglement processing apparatus.

  That is, FIG. 1 is a diagram for explaining an example of a method for producing a blended yarn using the cationic dyeable hollow cross-section yarn of the present invention, in which A is a cationic dyeable hollow that becomes a sheath yarn by the blended yarn. It is a cross-sectional yarn, and B is a highly shrinkable polyester yarn that becomes a core yarn. These yarns are both entangled between the fibers by the compressed air entanglement device 3 after passing through the raw yarn supply roller 1 and the preheating roller 2, and then heat set by the set heater 5, taken up by the take-off roller 4, and mixed with the product. The yarn package 6 is obtained.

  When heat is applied as a woven or knitted fabric, for example, by dyeing, the mixed fiber produced in this way has an appropriate lightweight feeling, excellent abrasion resistance and tearing strength, and also has a bulging feeling and a sharpness. It becomes a lightweight woven or knitted fabric with color. This knitted or knitted fabric also has the advantage of not hindering the motor function, and is suitable for outdoor and sports clothing.

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited by these. In addition, each evaluation item in each example was measured by the following method.

<Boiling water shrinkage>
According to the JIS L1013 "Testing method for chemical fiber filaments" shrinkage rate, the hot water shrinkage rate A method was used.
<Lightweight feeling>
Fabricate a plain weave fabric using the same yarn for both warp and weft using a cationic dyeable polyester filament, and cut the fabric into a 50cm square square after relaxing for 30 minutes at 90 ° C. In addition, regarding the weight feeling, the average evaluation of the sensory test by five panelists was expressed in three levels: excellent, acceptable, and impossible.
<Hollow rate>
The cationic dyeable polyester filament after yarn production was observed with a microscope on the cross-sectional surface of the raw yarn, and the area ratio of the hollow portion in the single yarn circumscribed circle area was expressed as a percentage. In the measurement, 10 yarns under the same conditions were each observed 5 times with a yarn cross-sectional microscope, and 10 single yarns were selected and extracted arbitrarily in one observation to obtain the hollowness, totaling 500 points. The average value was taken as the hollow ratio.

[Examples 1 to 6]
100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, 0.03 part of manganese acetate tetrahydrate (0.024 mol% with respect to dimethyl terephthalate), 0.009 part of cobalt acetate tetrahydrate as a color adjuster (terephthalic acid 0.007 mol% relative to dimethyl), 2.0 mol% relative to dimethyl terephthalate in amounts of 3,5-dicarbomethoxybenzenesulfonic acid tetra-n-butylphosphonium salt and 0 relative to dimethyl terephthalate. While adding 0.050 mol% of tetra-n-butylphosphonium bromide to a transesterification vessel and raising the temperature from 140 ° C. to 220 ° C. over 3 hours in a nitrogen gas atmosphere, the methanol produced was distilled out of the system. Transesterification was performed. Subsequently, 0.03 part of a 56% aqueous solution of normal phosphoric acid (0.003 mol% with respect to dimethyl terephthalate) was added to the obtained product as a stabilizer, and at the same time, excessive temperature rise of ethylene glycol was started. did. Ten minutes later, 0.04 part of antimony trioxide (0.027 mol% based on dimethyl terephthalate) was added as a polycondensation catalyst. When the internal temperature reached 240 ° C., the ethylene glycol purge was terminated, and the reaction product was transferred to a polymerization can.

Next, the reaction was carried out at normal pressure until the internal temperature reached 260 ° C. while raising the temperature, then the pressure was reduced from 760 mmHg to 1 mmHg over 1 hour, and at the same time the internal temperature was raised to 280 ° C. over 1 hour 4.5 minutes. . Under the reduced pressure of 1 mmHg or less, when the polymerization was further carried out at a polymerization temperature of 280 ° C. for 2 hours, the vacuum was broken with nitrogen gas to complete the polymerization reaction, and the polymer was discharged at 280 ° C. under nitrogen gas pressurization.
The resulting polymer has a softening point (SP) of 253.5 ° C., a diethylene glycol content (DEG content) of 1.68, an intrinsic viscosity after 10 minutes of discharge ([η] ₁₀ ) of 0.672, and after 60 minutes of discharge. ([Η] ₆₀ ) was 0.648.

In Examples 1 to 4, this polymer was made into chips according to a conventional method, and after drying, the shape of the die was changed so as to have a hollow single yarn cross-sectional shape, and spinning was performed at a take-up speed of 1200 m / min. An undrawn yarn of (decitex) / 24 fil (filament) was obtained. The undrawn yarn was stretched by heating at an optimum draw ratio and fixed by heat setting to obtain a hollow cross-section polyester filament yarn having the desired cationic dyeability.
The yarn forming properties and physical properties of the obtained cationic dyeable hollow cross-section polyester filament yarn were as shown in Table 1 below.

  In Examples 5 to 6, the hollow cross-section polyester filament yarns of Examples 1 and 2 were aligned with 33 dtex / 12 fil polyethylene terephthalate yarns having a boiling water shrinkage of 33%, and the air entanglement apparatus was applied by the method shown in FIG. Fiber mixing was performed using The results of the obtained mixed fiber composite yarn were as shown in Table 1. In addition, the hollow ratio of Examples 5-6 shown in Table 1 is a hollow ratio of the cationic dyeable hollow cross-section polyester filament yarn in the mixed fiber composite yarn.

2% of the cationic dye Catilon CD-FRLH / Catilon Blue CD-FBLH = 1/1 (made by Hodogaya Chemical Co., Ltd.) is a fabric made of these cationic dyeable hollow cross-section polyester filament yarns or mixed yarns (plain fabric). It dye | stained for 60 minutes at 120 degreeC with the dyeing bath containing owf (it contains 3 g / L of sodium sulfate as an auxiliary agent, and 0.3 g / L of acetic acid).
The dyed fabric thus obtained was evaluated for sharpness, lightness and texture. The results were as shown in Table 1 below.

[Comparative Examples 1-2]
In the method of Example 1, in Comparative Example 1, the single yarn cross-sectional shape was a round cross-section when spinning, and in Comparative Example 2, 3,5-dicarbomethoxybenzenesulfonic acid tetra-n-butylphosphonium was used in the polymerization step. The same method as in Example 1 was performed except that 3,5-dicarbomethoxybenzenesulfonic acid sodium salt and sodium bromide were used instead of the salt and tetra-n-butylphosphonium bromide.

  The results are also shown in Table 1. In Comparative Example 1, the desired cationic dyeable yarn and fabric were obtained without problems, but the texture was artificial and heavy, and the feeling of lightness was not felt at all. On the other hand, in Comparative Example 2, the fabric could be formed in the same manner as in the other examples, but the original yarn strength was the same as that of the conventional cationic dyeable hollow cross-section yarn, and the abrasion resistance and tear strength of the fabric were It was significantly inferior to the examples. Moreover, the lightness was also insufficient.

  The cationic dyeable polyester hollow cross-section yarn of the present invention is an outdoor or sports apparel that is excellent in wear resistance and tear strength while having a moderate lightness by being mixed with a single yarn or a high-shrinkage polyester yarn. It is possible to stably provide a light-weight knitted or knitted fabric that does not impede the motor function suitable for the above and exhibits a clear color.

Explanatory drawing regarding the manufacturing method of the mixed yarn of the cation dyeable polyester hollow cross-section yarn by this invention.

Explanation of symbols

1: Raw yarn supply roller 2: Preheating roller 3: Compressed air entanglement device 4: Take-off roller 5: Set heater 6: Product A: Scabbard yarn (cation dyeable hollow section yarn)
B: Core yarn (high shrinkage yarn)

Claims (3)

A cationic dyeable polyester yarn comprising a modified polyester having an intrinsic viscosity of 0.6 or more obtained by copolymerizing 0.1 to 0.6 mol% of a sulfonic acid phosphonium salt represented by the following general formula (I): A cationic dyeable polyester hollow cross-section yarn characterized in that the cross-sectional shape of the yarn is hollow and the single yarn hollow ratio is 5% or more.

  A cationic dyeable polyester blend comprising the cationic dyeable polyester hollow cross-section yarn according to claim 1 and a polyester filament having a boiling water shrinkage difference of 4 to 45%. Yarn.   A woven or knitted fabric comprising the cationic dyeable polyester hollow section yarn according to claim 1 and / or the polyester blended yarn according to claim 2 as constituent yarns.

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