JP5642981B2 - Production method of polyester monofilament for organdy - Google Patents

Description

  The present invention is an elution-divided monofilament having a shape in which the hardly-eluting component is divided into a plurality of easily-eluting components in the cross section of the fiber. The present invention relates to a polyester monofilament for woven or knitted fabric which has a certain gloss and can obtain a woven or knitted fabric having an appropriate dry feeling and a soft texture.

  Polyester fibers are widely used for general clothing and industrial materials because of excellent properties such as mechanical properties, chemical properties, easy care properties, and glossiness.

Organdy is a material in a special field when polyester fibers are used for clothing. Organdy is basically a transparent fabric woven from cotton. It is a plain plain weave that is the simplest weave and is alternately combined one by one in length and width. It is soft and elastic.

  Organdy has long been manufactured with thin silk and cotton threads. Since then, synthetic fibers, especially polyester fibers, have come to be used in organdy as well. Taking advantage of the above-mentioned features, it is used for bridal products, garments for monks and haori for fashion, and for clothing and decorations in special fields.

  However, organdy woven using synthetic fibers lacks a particularly high-class luster that creates a noble atmosphere, moderate dryness, and soft texture. Has been made.

  For example, Patent Document 1 discloses a monofilament having a trilobal cross-sectional shape as an organdy yarn of synthetic fiber in order to impart glossiness. When the monofilament described in Patent Document 1 is used, a glossy woven fabric can be obtained. However, since the single yarn fineness is extremely thick compared to natural fibers, the glossiness is high and the desired high-quality glossiness is achieved. Cannot be obtained. In addition, since the rigidity of the single yarn is increased by adopting the three-leaf cross-sectional shape, there is a problem that the texture of the organdy obtained is very hard.

  Moreover, in order to suppress glare and rigidity, a method of reducing the single yarn fineness is generally used. However, in this method, the drape property of the obtained organdy is lowered and the appearance is not elegant.

  A polyester fiber for organdy that has a light and high-grade luster, such as silk or cotton, and has an appropriate dry feeling and soft texture has not yet been developed.

  Moreover, as a woven or knitted fabric for clothing, there is a polyester woven or knitted fabric for women. Recently, such woven and knitted fabrics are mainly feminine, and like organdy, they are required to have a high-grade luster and have an appropriate dry feeling and soft texture. However, the present situation is that a polyester fiber satisfying the required characteristics has not been developed yet in this field.

JP 09-241923 A

The present invention has been made to solve the above problems, a suitable Applications for O Ganji has a gloss of luxury, the textiles, which can be obtained woven with moderate dry feeling and soft hand knitting It is a technical problem to provide.

  As a result of investigations to solve the above problems, the present inventors have reached the present invention.

That is, the present invention is a monofilament composed of an easily-eluting component and an hardly-eluting component, wherein the easily-eluting component has a shape obtained by dividing the hardly-eluting component into a plurality of parts in the cross section of the fiber. Is an aromatic dicarboxylic acid component in which 1 to 3 mol% of the dicarboxylic acid component has a sulfonate group, and is a polyester containing 5 to 20% by mass of a polyalkylene glycol having an average molecular weight of 1000 to 10,000. The hardly eluting component is a polyester in which 80 mol% or more of all the structural units is alkylene terephthalate, and the monofilament is divided by the eluting of the easily eluting component and has a single yarn fineness of 0.5 to 4 dtex. Expressing a plurality of filaments constituted by an eluting component,
The monofilament is obtained by spinning a plurality of filaments composed of an easily eluting component and a hardly eluting component from a spinneret, drawing the spun multifilament yarn, performing false twisting, then dividing the monofilament into a monofilament it is an gist method for producing a polyester monofilament for Oh Ganji, characterized by.
Further, the present invention performs alkali treatment on the woven or knitted fabric obtained by knitting and weaving using the polyester monofilament obtained by the above production method, and eluting the easily-eluting component to divide the polyester monofilament, The gist of the present invention is a method for producing a woven or knitted fabric characterized by expressing a plurality of filaments composed of a hardly eluting component having a single yarn fineness of 0.5 to 4 dtex.

Since the polyester monofilament in the present invention is a split type polyester composite fiber having a shape in which the hardly-eluting component is divided into a plurality of easily eluting components in the cross section of the fiber, the polyester monofilament in the present invention is used. After forming a woven or knitted fabric, elution treatment can be performed to obtain a fabric composed of fibers made of polyester, which is a hardly soluble component. Then, it has a gloss of luxury, moderate dry feeling and soft hand woven or knitted fabric can be obtained, it is possible to use suitably be turned Ganji.

In addition, the polyester monofilament in the present invention can be combined with other polyester monofilaments in the present invention or combined with other fibers depending on the use, and the blending ratio can be variously changed, so that a woven or knitted fabric rich in variations can be obtained. Can do. Especially in the use of women's clothing, the required characteristics change depending on the trend of the season and the times, which makes it very useful.

It is a cross-sectional schematic diagram which shows the embodiment of the polyester monofilament for organdys in this invention.

Hereinafter, the present invention will be described in detail.
The monofilament obtained by the present invention is a monofilament composed of an easily-eluting component and a hardly-eluting component, and has a shape in which the easily-eluting component is divided into a plurality of difficult-to-elute components in the cross section of the fiber. Fig.1 (a)-(f) is a cross-sectional schematic diagram which shows the embodiment of the polyester monofilament for organdy in this invention.

  In the figure, A represents polyester as an easily-eluting component, and B represents polyester as an easily-eluting component divided into a plurality by the polyester as an easily-eluting component. The shape of the monofilament may be not only a circular cross-sectional shape but also a deformed cross-sectional shape such as a triangular cross-section. The shape of the hard-to-elute component that is divided into fibers after the easy-to-elute component is eluted is preferably not only a round cross-sectional shape but also an irregular cross-section such as a triangle, a quadrangle, or a wedge shape.

  In the present invention, it is preferable that the polyester as an easily-eluting component has a dissolution rate in alkali of 5 times or more faster than the polyester as an easily-eluting component. Therefore, polyester A as an easily eluting component is an aromatic dicarboxylic acid component in which 1 to 3 mol% of dicarboxylic acid components have a sulfonate group, and 5 to 5 polyalkylene glycol having an average molecular weight of 1000 to 10,000. It is necessary to contain ~ 20 mass%.

  Examples of the aromatic digalbonic acid component having a sulfonate group include 5-sodium sulfoisophthalic acid, 5-sodium sulfoterephthalic acid, 5-potassium sulfoisophthalic acid, 5-potassium sulfoterephthalic acid, 5-lithium sulfoisophthalic acid, 5- Examples include phosphonium sulfoisophthalic acid.

  When the copolymerization amount of the aromatic dicarboxylic acid component having a sulfonate group in the easily eluting component polyester is less than 1 mol%, the dissolution rate with respect to alkali is slow, and the difference between the dissolution rate with the hardly eluting component is increased. Becomes difficult. On the other hand, when the copolymerization amount exceeds 3 mol%, the spinning operability is deteriorated and yarn breakage is likely to occur.

  In addition, polyalkylene glycol contained in the polyester, which is an easy-dissolvable component, dissolves quickly with an alkali to cut the molecular chain of the polyester, which is an easy-dissolvable component, and generate voids on the surface to increase the surface area. It acts to increase the dissolution rate by such means.

  Examples of the polyalkylene glycol include polyethylene glycol, polypropylene glycol, and a copolymer of polyethylene glycol and polypropylene glycol, among which polyethylene glycol is preferable.

  The polyalkylene glycol needs to have a molecular weight of 1000 to 10,000. When the molecular weight is smaller than this, the glass transition temperature of the easily-eluting component polyester is lowered, so that fusion occurs in the spinning process, yarn breakage easily occurs, and the spinning operability deteriorates. On the other hand, when the molecular weight is too large, the compatibility with the polyester is deteriorated and it is difficult to uniformly contain the polyester, the spinning operability is also deteriorated, and yarn breakage is likely to occur.

  On the other hand, when the content of the polyalkylene glycol is less than 5% by mass, the dissolution rate of the easily-eluting component polyester in the alkali is slowed. On the other hand, if it exceeds 20% by mass, the spinning operability is deteriorated and yarn breakage is likely to occur.

  In addition, it is preferable that the ratio of the easily-dissolvable component in a monofilament is 5-30 mass%, and it is preferable that it is 10-25 mass% especially. If the amount is less than 5% by mass, the resolution by the elution treatment is lowered. On the other hand, if it exceeds 30% by mass, the proportion of the polyester eluted by the elution treatment increases, which increases the environmental load, which is not preferable.

  If necessary, an antioxidant such as a hindered phenol-based compound, a heat-resistant agent, and the like can be blended with the polyester that is easily eluted.

  It is necessary to use a polyester in which 80 mol% or more of all the structural units is alkylene terephthalate as the polyester of the hardly eluting component which is the other component in the present invention. In particular, polyethylene terephthalate composed of a terephthalic acid component and an ethylene glycol component, polypropylene terephthalate composed of a terephthalic acid component and a 1,3-propanediol component, and polybutylene terephthalate composed of a terephthalic acid component and a 1,4-butanediol component are preferred, The third component may be copolymerized as long as the dissolution rate in alkali is not so high.

  Specific examples of copolymer components include succinic acid, adipic acid, azelaic acid, sebacic acid, 1,4-cyclohexanedicarboxylic acid, maleic acid, phthalic acid, isophthalic acid, 5-sodium sulfoisophthalic acid and other acid components, ethylene Glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,4-butanediol, neopentyl glycol, 1,4-butylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, polyethylene glycol, polytriglycol Examples include diol components such as methylene glycol, polytetramethylene glycol 4,4′-dihydroxybisphenol, and 1,4-bis (β-hydroxy) benzene.

  In addition, matting agents such as titanium dioxide, antioxidants such as hindered phenolic compounds, heat-resistant agents, flame retardants, antistatic agents, coloring agents, etc., are added to the polyesters of difficult-to-elute components as necessary. An agent can be blended.

Moreover, the polyester of a hard-to-elute component can impart the drape property which becomes an elegant texture to the obtained knitted fabric by including the inorganic particle mentioned later. As for content of an inorganic particle, 0.8-8 mass% is preferable, More preferably, it is the range of 1-5 mass%. By containing at least 0.8% by mass, the effect of imparting good drape properties can be exerted, and by making the content 8% by mass or less, yarn breakage, fluff and the like occur on production operability Problems are less likely to occur. Also, good gloss can be maintained. The inorganic particles may be added at the melting stage at the time of polymerization or spinning of the polyester, but it is preferably added at the time of polymerization in consideration of preventing aggregation and dispersing more uniformly.

The average particle size of the inorganic particles is preferably 2 μm or less, more preferably 1 μm or less. By setting the average particle size of the inorganic particles to 2 μm or less, the particles are not exposed locally, so the frictional resistance does not increase, the occurrence of yarn breakage due to stress bias during spinning, and fluffing during stretching. There will be no problems in production operability such as occurrence.

The density of the inorganic particles is preferably 3.5 g / cm ³ or more, more preferably 3.8 g / cm ³ or more. By setting the density of the inorganic particles to 3.5 g / cm ³ or more, the fiber density can be increased, and a woven or knitted fabric having excellent drape properties can be obtained. In the present invention, it is most preferable to use titanium dioxide as the inorganic particles. Examples of inorganic particles other than titanium dioxide that can be used without significant changes in texture and production operability include barium sulfate, amyrna, tin oxide, and magnesium oxide.

Polyester monofilament of the present invention, in consideration of operability, obtained efficiently by a multifilament yarn consisting of a plurality of filaments minute fiber. That is, a single filament having a cross-sectional shape in which the above-mentioned easily eluting component and difficultly eluting component have a specific divided shape is spun from one spinneret, and the spun multifilament yarn is spun. After performing stretching, heat treatment, false twisting, etc., it is split by a splitting machine to obtain the polyester monofilament in the present invention .

The polyester monofilament in the present invention preferably has a fineness of 4 to 40 dtex. When the fineness is less than 4 dtex, yarn breakage is likely to occur in the stretching, false twisting, and splitting processes. When the fineness exceeds 40 dtex, the filament cannot be uniformly cooled in the spinning process, and yarn breakage and quality variations are likely to occur.

The polyester monofilament in the present invention is a single filament fineness of a filament composed of a difficult-to-elute component, although the easily-eluting component is eluted by an elution treatment to express a filament composed of a plurality of difficult-to-elute polyesters. Needs to be 0.5-4 dtex.

  When the single yarn fineness of the filament made of polyester, which is a hardly soluble component after the elution treatment, is less than 0.5 dtex, the resulting woven or knitted fabric has a high-quality gloss, but the single yarn fineness is small. Therefore, the texture is too soft and does not have a waist, and tends to be a woven or knitted fabric that does not have a dry feeling or drape. Moreover, since the fineness of the single yarn is too thin, the color developability is lowered in dyeing applications, which is not preferable.

  On the other hand, if the single yarn fineness of the filament made of polyester, which is a difficult-to-elute component, exceeds 4 dtex, the single yarn fineness will increase, so that the resulting woven or knitted fabric has a dry feeling but a glare in glossiness and a texture. Tends to be hard.

Since the polyester monofilament in the present invention is one before the elution treatment, the knitting and weaving process can be easily performed. In addition, the polyester monofilaments in the present invention can be combined with each other and combined with other fibers depending on the use, and the blending ratio can be changed variously, so that a woven or knitted fabric rich in variations can be obtained. Especially in the use of women's clothing, the required characteristics change depending on the trend of the season and the times, which makes it very useful.

  Next, the manufacturing method of the polyester monofilament of the present invention will be described using an example. Polyester chips of the easily eluting component and the hardly eluting component are sufficiently dried and supplied to a general-purpose composite melt spinning apparatus. At this time, a plurality of yarns are spun from a composite spinneret designed so that the cross-sectional shape of the single yarn has a cross-sectional shape as shown in FIG.

The multifilament yarns 2500～4000M / minute half undrawn yarn obtained by spinning at a spinning speed of take Maki and twist draw-and then, obtain a port re ester monofilament was separated fiber by partial opening machine.

Or, the multifilament yarns 1000～4000M / min spinning at a spinning speed, to implement a simultaneous stretching (the so-called spin-draw method) Maki taken, then, obtain the port re ester monofilament was separated fiber by partial opening machine.

  In addition, what is necessary is just to set suitably a draw ratio, heat processing temperature, false twist conditions, etc. according to the use of the target filament physical property and woven / knitted fabric.

In the present invention, the woven or knitted fabric of the present invention can be obtained by subjecting the woven or knitted fabric obtained by knitting and weaving using the above-described polyester monofilament to alkali treatment to elute the easily-eluting components.
An example of the processing method after weaving and knitting using the polyester monofilament in the present invention will be described.

After knitting and weaving using the polyester monofilament in the present invention, a weight reduction treatment is performed with an alkali such as an aqueous sodium hydroxide solution. As a result, the polyester of the easily eluting component is eluted, the polyester monofilament is divided, the filament made of the polyester of the hardly eluting component is expressed, and a fabric composed of the filament of the hardly eluting component can be obtained. . The weight loss treatment can be performed, for example, by immersing the woven or knitted fabric in a sodium hydroxide aqueous solution having a concentration of 0.5% by mass at a temperature of 95 ° C. and processing until a predetermined weight loss rate is reached.

The polyester monofilament in the present invention can be used alone (100% used) to form a woven or knitted fabric, but may be used together with other fibers to form a woven or knitted fabric.

Hereinafter, the present invention will be described more specifically with reference to examples. In addition, the measurement and evaluation of the characteristic value in an Example were performed as follows.
(A) Intrinsic Viscosity It was determined from the solution viscosity measured at a temperature of 20 ° C. using an equimolar mixture of phenol and ethane tetrachloride as a solvent.
(B) NaOH weight loss time A sodium hydroxide aqueous solution (NaOH) having a concentration of 5% by mass and a temperature of 70 ° C. was immersed, and the weight loss rate was evaluated as 20%.
(C) Single yarn fineness after elution treatment The single yarn fineness after being divided by the elution treatment with a weight loss rate of 20% was calculated by the following formula (1).
Single yarn fineness after elution treatment (decitex) = [Fineness of polyester monofilament x (1
00-weight loss rate) / 100] / number of difficult-to-elute components divided by formula (1)
(Weight loss rate: 20%, number of difficult-to-elute components divided = 8)
(D) Spinning operability Spinning was carried out continuously for 24 hours, and the following three stages were evaluated according to the number of cut yarns during operation (per spindle).
○: No cutting thread △: Cutting thread once or twice ×: Cutting thread three or more times (e) Gloss evaluation The sensory evaluation by visual observation of 10 panelists who were familiar with the evaluation of the fabric (fabric) was conducted. Evaluation was made with the number of people judged to have a gloss with a high-class feeling, and ○ was accepted.
○: 9 people or more △: 5-8 people ×: 4 people or less (f) Dry feeling evaluation The sensory evaluation by the hand feeling of 10 panelists who are familiar with the evaluation of the fabric (fabric) was conducted, Evaluation was based on the number of people determined to have a dry feeling, and ○ was accepted.
○: 9 or more △: 5 to 8 people ×: 4 or less people (g) Soft feeling evaluation The sensory evaluation by the hand feeling of 10 panelists familiar with the evaluation of the fabric (fabric) was conducted, And it evaluated by the number of persons who judged that it was the texture which left the waist, and made ○ pass.
○: 9 people or more △: 5-8 people ×: 4 people or less

Example 1
As an easily eluting component polyester, an intrinsic viscosity of 0.73 is obtained by copolymerizing 2.5% by mole of 5-sodium sulfoisophthalic acid (SIP-Na) and 13.3% by weight of polyethylene glycol (PEG) having an average molecular weight of 8000. Copolymerized polyethylene terephthalate was used.
Polyethylene terephthalate (PET) having an intrinsic viscosity of 0.69 was used as the polyester as a hardly eluting component.
And the cross-sectional shape was equipped with a spinneret having 12 pores designed so that the easily eluting component polyester was divided into eight hardly eluting component polyesters as shown in FIG. 1 (d). Both polyesters were fed to a conventional compound spinning machine. Then, spinning was performed at a spinning temperature of 290 ° C., a composite ratio (mass ratio) of easily eluting component polyester / hardly eluting component polyester = 18.5 / 81.5, and spinning at a total discharge rate of 80 g / min. The spun yarn was wound at a speed of 3500 m / min while cooling and oiling to obtain a semi-undrawn yarn of 220 dtex / 12 filament.
Next, this semi-undrawn yarn was supplied to a false twisting machine, and drawn false twisting was performed at a working speed of 500 m / min and a draw ratio of 1.517 while unwinding in a non-twisted state. Then, the obtained false twist package was split into 12 false twisted yarns (monofilaments) with a splitting machine to obtain 12.1 dtex polyester monofilament.
Subsequently, the polyester monofilament was used and woven with a plain weave structure to obtain a woven fabric (woven fabric before weight loss). This fabric was immersed in an aqueous sodium hydroxide solution having a concentration of 5% by mass and a temperature of 70 ° C. and subjected to a weight reduction treatment until the weight loss rate became 20%, thereby completely eluting the easily-eluting polyester. And the weight-reduced fabric which consists of the fiber of the hard-to-dissolve component divided into 8 after the elution process (8 fibers with a single yarn fineness of 1.21 dtex) was created. This was washed with water and dried to remove moisture, thereby obtaining a fabric.

Examples 2-8, Comparative Examples 1-8
As the easily eluting component polyester, the copolymerized polyethylene terephthalate in which the copolymerization amount of SIP-Na and PEG used in Example 1 was changed as shown in Table 1 was used. Moreover, the single yarn fineness of the filament which consists of a hard-to-dissolve component after an elution process was changed as Table 1 by changing the total discharge amount. Otherwise in the same manner as in Example 1, a polyester monofilament was obtained. And weaving was carried out in the same manner as in Example 1, and a weight reduction treatment was performed to obtain a woven fabric.

  Table 1 shows the characteristic values and evaluation results of the polyester monofilaments and fabrics obtained in Examples 1 to 8 and Comparative Examples 1 to 8.

  As is apparent from Table 1, the polyester monofilaments obtained in Examples 1 to 8 were able to be obtained with good spinning operability, and the weight loss time in the aqueous sodium hydroxide solution was fast. The obtained woven fabric had a glossy feeling with a high-class feeling, and had an appropriate dry feeling and a soft texture.

  On the other hand, in Comparative Example 1, since the amount of SIP-Na copolymerization of the easily eluting component polyester was too small, in Comparative Example 3, the amount of copolymerization of PEG of the easily eluting component polyester was too small. Both filaments had a long weight loss time with NaOH and had a slow weight loss rate. In Comparative Example 2, the SIP-Na copolymerization amount of the polyester of the easy-eluting component was too large, and in Comparative Example 4, the copolymerization amount of PEG of the polyester of the easy-eluting component was too large. The semi-undrawn yarn could not be collected. In Comparative Example 5, since the PEG average molecular weight of the easily-eluting component polyester was too small, in Comparative Example 6, the PEG average molecular weight of the easily-eluting component polyester was too large. The yarn could not be collected. In Comparative Example 7, since the single yarn fineness of the fiber composed of the polyester of the hardly eluting component after the elution treatment was too thin, the obtained woven fabric had a glossy feeling with a high-class feeling but lacked a dry feeling and was soft. There was a texture with no waist. In Comparative Example 8, since the single yarn fineness of the fiber comprising the hardly-elutable component polyester after the elution treatment is too thick, the resulting woven fabric has a dry feeling but a glare in glossiness and a hard texture It became.

Example 11
In Example 1, polyethylene terephthalate (PET) having an intrinsic viscosity of 0.69 and containing 1.0 wt% of titanium dioxide having a density of 3.9 g / cm ³ and an average particle diameter of 1.0 μm is used as the hardly soluble component polyester. A polyester monofilament was obtained in the same manner as in Example 1 except that the woven material was woven in the same manner as in Example 1 using the obtained polyester monofilament and subjected to a weight reduction treatment to obtain a woven fabric.

Examples 12-22, Comparative Examples 11-21
In Example 11, as the polyester of the easily eluting component, the copolymerization amount of SIP-Na and PEG used in Example 11 was changed as shown in Table 2, and the titanium dioxide contained in the hardly eluting component Table 2 shows the single yarn fineness of the monofilament and the filament composed of difficult-to-elute components after the elution treatment by changing the total discharge amount as shown in Table 2. Except having changed, it carried out similarly to Example 11 and obtained the polyester monofilament. And weaving was carried out in the same manner as in Example 11, and a weight reduction treatment was performed to obtain a woven fabric. In Comparative Example 21, talc was used instead of titanium dioxide.

  Table 2 shows the characteristic values and evaluation results of the polyester monofilaments and fabrics obtained in Examples 11 to 22 and Comparative Examples 11 to 21. In addition, when evaluating about Examples 11-22 and Comparative Examples 11-21, in addition to the said evaluation item, evaluation of the drape property was also performed.

(Drapability evaluation)
The obtained fabric was subjected to sensory evaluation based on the hand feeling of 10 panelists who were familiar with the evaluation of the fabric, evaluated by the number of persons determined to have a drape feeling, and a mark of “good”.
○: 9 people or more △: 5-8 people ×: 4 people or less

As is apparent from Table 2, the polyester monofilaments obtained in Examples 11 to 22 were able to be obtained with good spinning operability, and the weight loss time in the aqueous sodium hydroxide solution was fast. The obtained woven fabric had a glossy feeling with a high-class feeling, an appropriate dry feeling and softness, and was particularly rich in drape.
On the other hand, in Comparative Example 11, since the amount of SIP-Na copolymerization of the easily eluting component polyester was too small, in Comparative Example 13, the amount of copolymerization of PEG of the easily eluting component polyester was too small. Both filaments had a long weight loss time with NaOH and had a slow weight loss rate. In Comparative Example 12, since the amount of SIP-Na copolymerization of the easily-eluting component polyester was too large, in Comparative Example 14, the amount of copolymerization of PEG of the easily-eluting component polyester was too large. The semi-undrawn yarn could not be collected. In Comparative Example 15, since the PEG average molecular weight of the easily eluting component polyester was too small, in Comparative Example 16, the PEG average molecular weight of the easily eluting component polyester was too large. The yarn could not be collected.
In Comparative Example 17, since the single yarn fineness of the fiber composed of the polyester of the hard-to-leach component after the elution treatment was too thin, the resulting woven fabric has a high-quality gloss, lacks dry feeling, and is soft. Became a soft texture. In Comparative Example 18, since the single yarn fineness of the fiber of the hardly-eluting component polyester after the elution treatment is too thick, the resulting woven fabric has a dry feeling but a glare in glossiness and a hard texture It became.
In Comparative Example 19, the amount of titanium dioxide in the difficult-to-elute component was too large, so the spinnability was poor and spinning was impossible. In Comparative Example 20, since the particle diameter of titanium dioxide was too large, the spinning condition was poor and spinning was impossible. In Comparative Example 21, since the particles having a low density were used, the drapability was insufficient.

Claims (7)

A monofilament composed of an easily eluting component and a hardly eluting component, wherein the easily eluting component has a shape obtained by dividing the hardly eluting component into a plurality of parts in the cross section of the fiber. Among them, 1 to 3 mol% is an aromatic dicarboxylic acid component having a sulfonate group, and is a polyester containing 5 to 20% by mass of a polyalkylene glycol having an average molecular weight of 1000 to 10,000, Polyester in which 80 mol% or more of all structural units is alkylene terephthalate, and the monofilament is divided by easily eluting components, and is composed of hardly eluting components having a single yarn fineness of 0.5 to 4 dtex. Expressing a plurality of filaments,
The monofilament is obtained by spinning a plurality of filaments composed of an easily eluting component and a hardly eluting component from a spinneret, drawing the spun multifilament yarn, performing false twisting, then dividing the monofilament into a monofilament process for producing a polyester monofilament for Oh Ganji, characterized by. Oh Ganji for polyester monofilament according to claim 1, wherein the cross-sectional shape of the filaments composed of difficult-to-extract component monofilaments expressed by dividing are modified cross-section by easily leachable component is eluted Production method. Claim 1 or 2 The method of producing O Ganji for polyester monofilament, wherein the monofilament fineness of the monofilament is 4-40 dtex. Difficult-to-extract component has an average particle size of 2μm or less, Oh Ganji for polyester monofilament according to claim 1, characterized in that it comprises a density 3.5 g / cm ³ or more inorganic particle production Method. 4. production method of Oh Ganji for polyester monofilament, wherein the inorganic particles are titanium dioxide.   The polyester is obtained by subjecting a woven or knitted fabric obtained by knitting or weaving using the polyester monofilament obtained by the production method according to any one of claims 1 to 5 to an alkaline treatment and eluting an easily-eluting component. A method for producing a knitted or knitted fabric, comprising dividing a monofilament to develop a plurality of filaments composed of a hardly-eluting component having a single yarn fineness of 0.5 to 4 dtex. A woven or knitted fabric obtained by the method for producing a woven or knitted fabric according to claim 6.

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