JP5206640B2 - Modified cross section polyamide multifilament - Google Patents

Modified cross section polyamide multifilament Download PDF

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JP5206640B2
JP5206640B2 JP2009228411A JP2009228411A JP5206640B2 JP 5206640 B2 JP5206640 B2 JP 5206640B2 JP 2009228411 A JP2009228411 A JP 2009228411A JP 2009228411 A JP2009228411 A JP 2009228411A JP 5206640 B2 JP5206640 B2 JP 5206640B2
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polyamide multifilament
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JP2011074539A (en
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健明 河野
憲司 伊藤
正弘 森田
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Toray Industries Inc
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Description

本発明は、やわらかさ・しなやかさを持ち且つ吸水・速乾性・マイルドな光沢性に優れた高品位の布帛を得るのに好適な異形断面ポリアミドマルチフィラメントに関する。更には、単糸繊度が細く且つ異形断面マルチフィラメントの断面のひずみや単糸間での断面バラツキが少なく、織編物などの布帛にした際に織編目の粗密感が少なく染色後のスジ発生が少ない高品位な布帛を得るのに好適な異形断面ポリアミドマルチフィラメントに関する。   The present invention relates to a modified cross-section polyamide multifilament suitable for obtaining a high-quality fabric having softness, flexibility, water absorption, quick drying, and mild glossiness. Furthermore, the fineness of the single yarn is small, the distortion of the cross-section of the irregular shaped multifilament and the cross-sectional variation between the single yarns are small, and when the fabric is made of woven or knitted fabric, the texture of the woven and knitted fabric is small and streaks are generated after dyeing. The present invention relates to a modified multi-section polyamide multifilament suitable for obtaining a high-quality fabric with a small amount.

合成繊維の一つであるポリアミドマルチフィラメントは高強度、耐摩耗性、ソフト性、染色鮮明性などの優れた特徴を持っているため、パンティストッキング、タイツなどのレッグウェア、ランジェリー、ファンデーションなどのインナーウェア、スポーツウェア、カジュアルウェアなどの衣料用途に好まれて用いられてきている。   Polyamide multifilament, one of the synthetic fibers, has excellent characteristics such as high strength, abrasion resistance, softness, and clearness of dyeing. Therefore, legwear such as pantyhose and tights, innerwear such as lingerie and foundation. It has been used favorably for apparel applications such as clothing, sportswear and casual wear.

しかるに、近年の消費者ニーズは、更なるソフト感やヌメリ感、マイルドな光沢といった風合い、および吸水・速乾性などの高い機能性を求めてきており、それに対応して単糸細繊度化、多フィラメント化、および横断面に複数の凹部を設ける等したいわゆるマルチローバルによる異形化が求められてきている。   However, consumer needs in recent years have been demanding higher softness and slimeness, a texture such as mild luster, and high functionality such as water absorption and quick-drying. There has been a demand for irregularization by so-called multi-lobal, such as forming a filament and providing a plurality of recesses in the cross section.

従来のポリアミドマルチフィラメントの溶融紡糸方法では、一般に異形断面糸を安定して品質良く製糸することは困難である。特に単糸繊度を細くし多フィラメント化すると、フィラメント長手方向の繊度ムラや各単糸が均一に冷却されないことにより、溶融紡糸糸条が冷却固化されるまでに例えば断面形状が単糸内でひずんだり、単糸間でばらついたりして、それが異形断面糸の異形度バラツキとして現れる等の問題があり、工業生産的に非常に困難であった。   In the conventional polyamide multifilament melt spinning method, it is generally difficult to stably produce a modified cross-section yarn with high quality. In particular, when the single yarn fineness is reduced to increase the number of filaments, the cross-sectional shape is distorted in the single yarn before the melt-spun yarn is cooled and solidified due to unevenness of the fineness in the longitudinal direction of the filament and the fact that each single yarn is not cooled uniformly. However, there are problems such that the yarns vary between the single yarns and appear as variations in the irregularity of the irregularly shaped cross-section yarns, which is very difficult in industrial production.

従来の異形断面ポリアミドマルチフィラメントの溶融紡糸方法として、例えば、溶融紡糸糸条群の外周側から該溶融紡糸糸条群の中心側に向けて冷却風を吹き出す円筒型冷却装置を用い急冷する製造装置を用いた製造方法が知られている(特許文献1、特許文献2)。しかしながら、紡糸時の冷却風が環状に配列された溶融紡糸糸条群の中心部に向かうため、溶融紡糸糸条群の外側雰囲気温度が低くなる一方、内側の雰囲気温度が高くなり、環状に配列された溶融紡糸糸条群の外側と内側とで冷却速度差が生まれる。この結果、溶融紡糸糸条単糸間で凹度(ローバル度LB)や繊度がばらついたり、また溶融紡糸糸条単糸内についても単糸内にある各凹部の凹度(ローバル度LB)がばらつき、安定した異形断面形状を得ることが出来ず、織編物などの布帛にした際に織編目の粗密感が発生したり、さらには光沢感が不均一となり染色後のスジなどが発生するといった課題があった。   As a conventional melt spinning method for a modified multi-section polyamide multifilament, for example, a manufacturing apparatus that rapidly cools using a cylindrical cooling device that blows cooling air from the outer peripheral side of the melt-spun yarn group toward the center side of the melt-spun yarn group A manufacturing method using this is known (Patent Document 1, Patent Document 2). However, since the cooling air at the time of spinning is directed to the center of the melt-spun yarn group arranged in an annular shape, the outer ambient temperature of the melt-spun yarn group is lowered, while the inner ambient temperature is increased, and the annular array is arranged in an annular shape. A cooling rate difference is produced between the outside and inside of the melt-spun yarn group. As a result, the degree of concaveness (loval degree LB) or fineness varies between the melt-spun yarn single yarns, and the degree of concaveness (loval degree LB) of each recess in the single yarn is also within the melt-spun yarn single yarn. Uneven variation and stable irregular cross-sectional shape cannot be obtained, and when a fabric such as a woven or knitted fabric is used, the texture of the woven or knitted fabric is generated, and the glossiness is uneven and streaks after dyeing are generated. There was a problem.

一方で複合紡糸により2種類以上のポリマーをいわゆる海島型に複合紡糸し、特定のポリマーを溶出したりすることによって単糸細繊度化、多フィラメント化および繊維横断面の高異形糸などが知られている(特許文献3)。しかしながら複合繊維は、製法が複雑であるために製糸工程での生産安定性が劣るだけでなく、製造コストがかかる。さらに繊維の太さ、フィラメント数などを変更するのも容易ではなく汎用性に欠ける。   On the other hand, two or more types of polymers are compound-spun into a so-called sea-island type by compound spinning, and by eluting specific polymers, single yarn fineness, multifilaments, and highly deformed yarns with fiber cross-section are known. (Patent Document 3). However, the composite fiber is not only inferior in production stability in the yarn production process due to the complicated production method, but also costs in production. Furthermore, it is not easy to change the fiber thickness, the number of filaments, etc., and it lacks versatility.

特開2007−247118号公報JP 2007-247118 A 特開2009−133025号公報JP 2009-133025 A 特開2007−169829号公報JP 2007-169829 A

本発明は、前記した従来技術の問題を解決し、織編物などの布帛にした際、やわらかさ、しなやかさ、マイルドな光沢感を持ち、且つ卓越した吸水・速乾性を有する高品位の布帛を与え得る異形断面ポリアミドマルチフィラメント、及びその製造方を提供することを課題とする。   The present invention solves the above-mentioned problems of the prior art and provides a high-grade fabric having softness, flexibility, mild glossiness, and excellent water absorption and quick-drying properties when it is made into a fabric such as woven or knitted fabric. It is an object of the present invention to provide an irregularly shaped polyamide multifilament that can be provided, and a method for producing the same.

前記課題を達成するため、本発明は以下の構成を採用する。   In order to achieve the above object, the present invention adopts the following configuration.

(1)2つ以上の凹部を有する異形単糸を少なくとも一部に含むポリアミドマルチフィラメントであって、且つ2つ以上の凹部を有する異形単糸が下記の範囲にあることを特徴とするポリアミドマルチフィラメント。
A.単糸繊度の平均値が0.10〜2.00dtex
B.単糸内にある各凹部の凹度(ローバル度LB)がそれぞれ5〜50%
C.単糸内にある各凹部の凹度バラツキ(変動係数CV%)が10%以下
(1) A polyamide multifilament comprising at least part of a deformed single yarn having two or more recesses, and the deformed single yarn having two or more recesses is in the following range. filament.
A. Average value of single yarn fineness is 0.10 to 2.00 dtex
B. Recess degree of each concave part in single yarn (Roval degree LB) is 5-50% respectively
C. Recessedness variation (coefficient of variation CV%) of each recess in a single yarn is 10% or less

(2)ポリアミドマルチフィラメントを構成するポリマーがポリカプロアミド、ポリヘキサメチレンアジパミドから選ばれた少なくとも1種であることを特徴とする前記(1)に記載のポリアミドマルチフィラメント。   (2) The polyamide multifilament described in (1) above, wherein the polymer constituting the polyamide multifilament is at least one selected from polycaproamide and polyhexamethylene adipamide.

(3)2つ以上の凹部を有する異形単糸について、3〜8つの凹部と同数の凸部がそれぞれ等角度間隔の放射状に突起していることを特徴とする前記(1)または(2)に記載のポリアミドマルチフィラメント。   (3) The modified single yarn having two or more concave portions, wherein the same number of convex portions as three to eight concave portions protrude radially at equal angular intervals, respectively (1) or (2) The polyamide multifilament described in 1.

(4)凹部を有しない単糸を少なくとも一部に含むことを特徴とする前記(1)〜(3)のいずれかに記載のポリアミドマルチフィラメント。   (4) The polyamide multifilament according to any one of (1) to (3), wherein the polyamide multifilament includes at least part of a single yarn having no recess.

(5)凹部を有しない単糸が真円形断面であることを特徴とする前記(4)に記載のポリアミドマルチフィラメント。   (5) The polyamide multifilament as described in (4) above, wherein the single yarn having no recess has a true circular cross section.

(6)2つ以上の凹部を有する異形単糸について、その単糸繊度のバラツキ(変動係数CV%)が5%以下であることを特徴とする前記(1)〜(5)のいずれかに記載のポリアミドマルチフィラメント。   (6) Any of the above-mentioned (1) to (5), wherein the irregular single yarn having two or more recesses has a variation in the single yarn fineness (variation coefficient CV%) of 5% or less. The polyamide multifilament described.

(7)2つ以上の凹部を有する異形単糸について、単糸内にある各凹部の凹度平均値を算出し、その平均値の単糸間バラツキ(変動係数CV%)が10%以下であることを特徴とする前記(1)〜(6)のいずれかに記載のポリアミドマルチフィラメント。   (7) For deformed single yarns having two or more recesses, the average concave value of each recess in the single yarn is calculated, and the average value variation (variation coefficient CV%) between the single yarns is 10% or less. The polyamide multifilament according to any one of (1) to (6), wherein the polyamide multifilament is present.

(8)前記(1)〜(7)のいずれかに記載のポリアミドマルチフィラメントを少なくとも一部に有する布帛。   (8) A fabric having at least a part of the polyamide multifilament according to any one of (1) to (7).

(9)前記(1)〜(7)のいずれかに記載のポリアミドマルチフィラメントを少なくとも一部に有する繊維製品。   (9) A fiber product having at least a part of the polyamide multifilament according to any one of (1) to (7).

(10)単糸繊度の平均値が0.10〜2.00dtexの範囲にある2つ以上の凹部を有する異形単糸を少なくとも一部に含むポリアミドマルチフィラメントの溶融紡糸方法であって、紡糸口金外周部に円周状に配された吐出孔を有する紡糸口金の中心部から真下に、円周状に配された吐出孔から吐出された溶融紡糸糸条の内側に溶融紡糸糸条を強制冷却する冷却装置を有しており、且つ冷却装置が下記を満足することを特徴とするポリアミドマルチフィラメントの溶融紡糸方法。
A.紡糸口金面から冷却装置の冷却開始位置までの距離(L) 20mm≦L≦70mm
B.冷却装置の冷却風吹き出し部の長さ(D) 100mm≦D≦600mm
(10) A polyamide multifilament melt spinning method comprising at least part of a deformed single yarn having two or more concave portions having an average single yarn fineness in a range of 0.10 to 2.00 dtex, wherein the spinneret The melt-spun yarn is forcibly cooled inside the melt-spun yarn discharged directly from the center of the spinneret having the discharge holes arranged circumferentially on the outer periphery. A polyamide multifilament melt spinning method, characterized in that the cooling device satisfies the following conditions.
A. Distance from spinneret surface to cooling start position of cooling device (L) 20 mm ≦ L ≦ 70 mm
B. Length of cooling air blowing part of cooling device (D) 100 mm ≦ D ≦ 600 mm

(11)溶融紡糸糸条を強制冷却する冷却装置の真下に環状型給油ガイドを有しており、紡糸口金から吐出された溶融紡糸糸条を環状型ガイドに接触させて給油させることを特徴とする前記(10)に記載のポリアミドマルチフィラメントの溶融紡糸方法。   (11) An annular type oil supply guide is provided directly below the cooling device for forcibly cooling the melt spun yarn, and the melt spun yarn discharged from the spinneret is brought into contact with the annular type guide to supply oil. The polyamide multifilament melt spinning method according to (10) above.

本発明の異形断面ポリアミドマルチフィラメントは、単糸繊度が細く、異形断面形状のひずみやバラツキが小さいため、織編物などの布帛にした際、織編物の粗密感や染色後のスジが出ず、やわらかさ、しなやかさ、マイルドな光沢感を持ち、高吸水・速乾性を有する高品位の布帛とすることができる。   The irregular cross-section polyamide multifilament of the present invention has a fine single yarn fineness and small distortion and variation in the irregular cross-sectional shape. It can be made into a high-grade fabric having softness, suppleness, mild gloss, and high water absorption and quick drying.

本発明における異形断面繊維の一例である。It is an example of the irregular cross-section fiber in this invention. 本発明における異形断面繊維の一例である。It is an example of the irregular cross-section fiber in this invention. 本発明で好ましく用い得る溶融紡糸装置の一例における紡出後給油までの概略図である。FIG. 2 is a schematic view up to oiling after spinning in an example of a melt spinning apparatus that can be preferably used in the present invention. 本発明で好ましく用い得る環状給油装置の一例における概略図である。It is the schematic in an example of the cyclic | annular oil supply apparatus which can be preferably used by this invention.

以下、本発明をさらに詳細に説明する。   Hereinafter, the present invention will be described in more detail.

本発明の異形断面ポリアミドマルチフィラメントは、主としてポリアミドからなることが重要である。ここでいう「主として」としては、繰り返し単位のうちアミド単位が80モル%以上であるポリアミドであることをいい、好ましくは繰り返し単位のうち、アミド単位が90モル%以上あるものが好ましい。本発明に用いられるポリアミドは、いわゆる炭化水素が主鎖にアミド結合を介して連結された高分子量体からなる樹脂であり、具体的には、ポリカプロアミド、ポリウンデカンアミド、ポリドデカンアミド、ポリテトラメチレンアジパミド、ポリペンタメチレンアジパミド、ポリペンタメチレンセバカミド、ポリヘキサメチレンアジパミド、ポリヘキサメチレンセバカミド、ポリヘキサメチレンドデカンアミド、ポリヘキサメチレントリデカンアミド等やこれらの共重合体が挙げられるが、経済的な面、製糸が比較的容易な点や染色性、機械特性に優れている点等から、かかるポリアミドとしては、主としてポリカプラミド、ポリヘキサメチレンアジパミドからなるポリアミドであることが好ましい。ここでいう「主として」とは、ポリカプロアミドを構成するε−カプロラクタム単位として、ポリヘキサメチレンアジパミドを構成するヘキサメチレンジアンモニウムアジペート単位として80モル%以上であることをいい、さらに好ましくは90モル%以上である。   It is important that the modified cross-section polyamide multifilament of the present invention is mainly composed of polyamide. As used herein, “mainly” refers to a polyamide having 80 mol% or more of amide units among repeating units, and preferably 90 mol% or more of amide units among repeating units. The polyamide used in the present invention is a resin composed of a high molecular weight substance in which a so-called hydrocarbon is connected to the main chain through an amide bond. Specifically, polycaproamide, polyundecanamide, polydodecanamide, Tetramethylene adipamide, polypentamethylene adipamide, polypentamethylene sebamide, polyhexamethylene adipamide, polyhexamethylene sebamide, polyhexamethylene dodecanamide, polyhexamethylene tridecanamide, etc. Examples of such polyamides include polycapramide and polyhexamethylene adipamide because they are economical, relatively easy to produce yarn, excellent in dyeability, and mechanical properties. Polyamide is preferred. The term “mainly” as used herein refers to 80 mol% or more as hexamethylene diammonium adipate units constituting polyhexamethylene adipamide as ε-caprolactam units constituting polycaproamide, more preferably It is 90 mol% or more.

本発明の異形断面ポリアミドマルチフィラメントの98%硫酸相対粘度は、2.2〜3.7の範囲であることが好ましく、さらには2.4〜3.3の範囲であることが好ましく、より好ましくは2.4〜2.7の範囲である。   The 98% sulfuric acid relative viscosity of the modified cross-section polyamide multifilament of the present invention is preferably in the range of 2.2 to 3.7, more preferably in the range of 2.4 to 3.3, and more preferably. Is in the range of 2.4 to 2.7.

本発明の異形断面ポリアミドマルチフィラメントには、本発明の効果を損なわない範囲において種々の添加剤を含んでいても良い。この添加剤を例示すると、マンガン化合物等の安定剤、酸化チタン等の着色剤、難燃剤、導電性付与剤、繊維状強化剤等が挙げられる。   The modified cross-section polyamide multifilament of the present invention may contain various additives as long as the effects of the present invention are not impaired. Examples of this additive include stabilizers such as manganese compounds, colorants such as titanium oxide, flame retardants, conductivity-imparting agents, and fibrous reinforcing agents.

本発明の異形断面ポリアミドマルチフィラメントの単糸繊度は、2つ以上の凹部を有する異形単糸について、その平均値が0.10〜2.00dtexの範囲であることが重要で、好ましくは0.30〜1.50dtexの範囲であり、さらに好ましくは0.40〜1.20dtexの範囲である。2つ以上の凹部を有する異形単糸の単糸繊度の平均値が0.10dtex未満であると製糸工程での糸切れが多発し、本発明の異形断面ポリアミドマルチフィラメントの安定生産が困難になる。また逆に、2.00dtexよりも大きい場合には織編物などの布帛にした際のソフト性や吸水性に欠けるものとなる。   Regarding the single yarn fineness of the modified cross-section polyamide multifilament of the present invention, it is important that the average value of the modified single yarn having two or more recesses is in the range of 0.10 to 2.00 dtex. It is the range of 30-1.50 dtex, More preferably, it is the range of 0.40-1.20 dtex. If the average value of the single yarn fineness of the deformed single yarn having two or more concave portions is less than 0.10 dtex, yarn breakage frequently occurs in the yarn making process, and stable production of the modified cross-section polyamide multifilament of the present invention becomes difficult. . On the other hand, if it is larger than 2.00 dtex, the softness and water absorbability when it is made into a fabric such as a woven or knitted fabric is lacking.

また、本発明の異形断面ポリアミドマルチフィラメントの単糸繊度は、2つ以上の凹部を有する異形単糸について、その単糸繊度バラツキ(変動係数CV%)が5%以下であることが好ましい。さらに好ましくは3%以下である。単糸繊度バラツキが5%を超えると、布帛にした際のスジや濃淡ムラが発生する可能性があり、満足できる風合いを得られにくい場合がある。   The single yarn fineness of the modified cross-section polyamide multifilament of the present invention is preferably such that the single yarn fineness variation (variation coefficient CV%) is 5% or less for the deformed single yarn having two or more concave portions. More preferably, it is 3% or less. If the single yarn fineness variation exceeds 5%, streaks and shading unevenness may occur in the fabric, and it may be difficult to obtain a satisfactory texture.

単糸繊度バラツキ(変動係数CV%)とは、2つ以上の凹部を有する異形単糸10本をランダムに選定し、その10本についてそれぞれ単糸繊度を測定し、その標準偏差σに対する平均値dの比の百分率により求められるものをいう。また、同一フィラメント内において2つ以上の凹部を有する異形単糸が9本以下の場合は、全ての異形単糸の単糸繊度を測定するものとする。またここでの標準偏差σは各単糸繊度の不偏分散により算出されるものとする。すなわち、
単糸繊度の変動係数CV%=100×σ/dで算出される。
Single yarn fineness variation (coefficient of variation CV%) means that ten irregularly shaped single yarns having two or more recesses are randomly selected, the single yarn fineness is measured for each of the ten yarns, and the average value for the standard deviation σ. What is obtained by the percentage of the ratio of d. Further, when the number of deformed single yarns having two or more concave portions in the same filament is 9 or less, the single yarn fineness of all the deformed single yarns is measured. The standard deviation σ here is calculated by the unbiased dispersion of the single yarn fineness. That is,
Single yarn fineness variation coefficient CV% = 100 × σ / d.

また、本発明の異形断面ポリアミドマルチフィラメントの総繊度は、100dtex以下であることが好ましい。さらに好ましくは70dtex以下である。また、総繊度の下限としては、布帛の強力低下を考慮した際、15dtex以上であることが好ましい。総繊度が上記範囲にある場合、製糸性、高次通過性の点で好ましい。   The total fineness of the modified cross-section polyamide multifilament of the present invention is preferably 100 dtex or less. More preferably, it is 70 dtex or less. Further, the lower limit of the total fineness is preferably 15 dtex or more in consideration of a decrease in fabric strength. When the total fineness is in the above range, it is preferable from the viewpoints of yarn production and high-order passage.

本発明の異形断面ポリアミドマルチフィラメントの異形断面形状は、2つ以上の凹部を有するいわゆるマルチローバルであることが重要である。凹部がない場合や凹部が1つの場合は、マルチフィラメントの単糸間に十分な空隙を得ることができないため、布帛にした際の吸水性等の機能面で劣ることとなる。より好ましい異形断面形状としては3〜8つの凹部と同数の凸部を有し、凸部がそれぞれ等角度間隔の放射線状に突起した異形断面形状であり、織編物などの布帛にした際に吸水性に併せてマイルドな光沢感が得られる。さらに好ましくは3〜6つの凹部と同数の凸部を有し、凸部それぞれ等角度間隔の放射状に突起した異形断面であることが望ましい。   It is important that the modified cross-section polyamide multifilament of the present invention is a so-called multi-lobal shape having two or more recesses. When there is no recess or when there is only one recess, a sufficient space cannot be obtained between the single yarns of the multifilament, so that the function such as water absorption when used as a fabric is inferior. More preferably, the modified cross-sectional shape has the same number of convex portions as three to eight concave portions, and each of the convex portions protrudes radially at equal angular intervals, and absorbs water when formed into a fabric such as a woven or knitted fabric. A mild luster is obtained along with the characteristics. More preferably, it has a convex section with the same number as 3 to 6 concave portions, and each of the convex portions has a deformed cross section projecting radially at equal angular intervals.

また、本発明の異形断面ポリアミドマルチフィラメントの異形断面形状は、2つ以上の凹部を有する異形単糸10本(単糸数が10以下の場合は全ての異形単糸)を選定し、各単糸内にあるすべての凹部の凹度(ローバル度LB)がそれぞれ5〜50%の範囲であることが重要である。好ましくは10〜40%の範囲であり、さらに好ましくは20〜30%の範囲である。ローバル度LBが50%を越えると、製糸工程での糸切れや織編物の布帛にした際にスジや濃淡ムラが発生し、また逆に5%未満の場合には布帛にした際の吸水、速乾性などの機能性が劣る。   In addition, the modified cross-sectional polyamide multifilament of the present invention is selected from 10 deformed single yarns having two or more recesses (all deformed single yarns when the number of single yarns is 10 or less), and each single yarn It is important that the indentations of all the recesses (loval degree LB) are in the range of 5 to 50%. Preferably it is 10 to 40% of range, More preferably, it is 20 to 30% of range. When the degree of globalization LB exceeds 50%, streaks and shading unevenness occurs when yarn breakage or woven or knitted fabric is used in the yarn-making process, and conversely, if it is less than 5%, water absorption when the fabric is made, Functionality such as quick-drying is inferior.

また、本発明の異形断面ポリアミドマルチフィラメントの異形断面形状は、2つ以上の凹部を有する異形単糸について、その単糸内にある各凹部の凹度(ローバル度LB)バラツキが変動係数CV%で10%以下となることが重要である。好ましくは7%以下であり、さらに好ましくは5%以下である。ローバル度LBバラツキが変動係数CV%で10%を越えると、織編物の布帛にした際に粗密感が発生するばかりか、単糸内にある各凹部のローバル度LBがばらつくことで反射強度や光沢感が不均一となり、染色後のスジや濃淡ムラが発生し満足できる風合いとはならない。
単糸内のローバル度バラツキ(変動係数CV%)は以下の方法で算出する。
(1)2つ以上の凹部を有する異形単糸10本をランダムに選定する(単糸数が10以下の場合は全ての異形単糸を測定する)。
(2)各単糸について、その単糸内にある全ての凹部のローバル度LBを測定し、単糸毎に標準偏差(不偏分散により算出)σと平均値xを算出する。
(3)各単糸について、標準偏差(不偏分散により算出)σに対する平均値xの比の百分率(変動係数CV%)を算出する。変動係数CV%=100×σ/x
The modified cross-sectional shape of the modified multi-filament polyamide multifilament of the present invention is a variation coefficient CV% in the variation of the concave degree (low globality LB) of each concave portion in the single yarn having two or more concave portions. It is important to be 10% or less. Preferably it is 7% or less, More preferably, it is 5% or less. When the variation in the LB of the LB exceeds 10% with a coefficient of variation CV%, not only does the woven / knitted fabric have a feeling of density, but the LB of the individual recesses in the single yarn varies, and the reflection strength and The glossiness becomes uneven and streaks and shading unevenness occurs after dyeing, and the texture is not satisfactory.
The variation in the global degree (variation coefficient CV%) in a single yarn is calculated by the following method.
(1) Randomly select 10 deformed single yarns having two or more recesses (when the number of single yarns is 10 or less, all deformed single yarns are measured).
(2) For each single yarn, the degree of globalization LB of all the recesses in the single yarn is measured, and a standard deviation (calculated by unbiased dispersion) σ and an average value x are calculated for each single yarn.
(3) For each single yarn, the percentage (variation coefficient CV%) of the ratio of the average value x to the standard deviation (calculated by unbiased dispersion) σ is calculated. Coefficient of variation CV% = 100 × σ / x

また、本発明の異形断面ポリアミドマルチフィラメントの異形断面形状は、2つ以上の凹部を有する異形単糸について、その単糸内にある各凹部のローバル度LBの平均値を算出し、その平均値の単糸間バラツキが変動係数CV%で10%以下となることが好ましい。さらに好ましくは7%以下、より好ましくは5%以下である。単糸間のローバル度LBバラツキが変動係数CV%で10%を越えると、織編物の布帛にした際に粗密感が発生する可能性がある。また、染色後のスジや濃淡ムラも発生することがあり、満足できる風合いを得られにくい場合がある。   Further, the modified cross-sectional shape of the modified multi-section polyamide multifilament of the present invention calculates the average value of the degree of globalization LB of each concave portion in the single yarn with respect to the modified single yarn having two or more concave portions. It is preferable that the single yarn variation is 10% or less with a coefficient of variation CV%. More preferably, it is 7% or less, More preferably, it is 5% or less. When the degree of variation in the LB between single yarns exceeds 10% with a coefficient of variation CV%, there is a possibility that a feeling of density will occur when a woven or knitted fabric is formed. In addition, streaks and shading unevenness may occur after dyeing, and it may be difficult to obtain a satisfactory texture.

単糸間のローバル度バラツキ(変動係数CV%)は以下の方法で算出する。
(1)2つ以上の凹部を有する異形単糸10本をランダムに選定する(単糸数が10以下の場合は全ての異形単糸を測定する)。
(2)各単糸について、その単糸内にある全ての凹部のローバル度LBを測定し、単糸毎に平均値xを算出する。
(3)単糸毎に算出した平均値xについて、その標準偏差(不偏分散により算出)Σと総平均値Xを算出する。
(4)標準偏差(不偏分散により算出)Σに対する総平均値Xの比の百分率(変動係数CV%)を算出する。変動係数CV%=100×Σ/X
The variation in the global degree between single yarns (coefficient of variation CV%) is calculated by the following method.
(1) Randomly select 10 deformed single yarns having two or more recesses (when the number of single yarns is 10 or less, all deformed single yarns are measured).
(2) For each single yarn, the global level LB of all the concave portions in the single yarn is measured, and an average value x is calculated for each single yarn.
(3) For the average value x calculated for each single yarn, the standard deviation (calculated by unbiased dispersion) Σ and the total average value X are calculated.
(4) A percentage (variation coefficient CV%) of the ratio of the total average value X to the standard deviation (calculated by unbiased variance) Σ is calculated. Coefficient of variation CV% = 100 × Σ / X

ローバル度LBについて説明すると、図1に示す通り、ローバル度LBとは異形断面及び混繊ポリアミドマルチフィラメントの異形断面単糸横断面において、隣り合う2つの凸部における接点SとSとの接線の長さaに対する、それら2つの凸部の間に形成される凹部の低点から該接線におろした垂線の長さbの比の百分率(%)をいう。すなわち、LB(%)=100×b/aで算出される。 The global degree LB will be described. As shown in FIG. 1, the global degree LB is different from that of the contact points S 1 and S 2 in the two adjacent convex portions in the irregular cross section and the irregular cross section single yarn cross section of the mixed polyamide multifilament. The percentage (%) of the ratio of the length b of the perpendicular line extending from the low point of the concave portion formed between the two convex portions to the length a of the tangential line. That is, LB (%) = 100 × b / a.

本発明の異形断面ポリアミドマルチフィラメントは、凹部を有しない単糸との混繊とすることで染色後のスジの発生を極限まで抑えることができたり、単糸間の空隙率が小さくなることで毛細管現象が働き、布帛とした際により高い吸水性を付与することができたりする。ここでいう「凹部を有しない単糸」とは、真円、楕円、レンズ、正方・直方形等の文字通り凹部を有しない形状の単糸をいうが、より好ましい形状としては真円型である。ここで、真円型とは厳密に真円である必要はなく、例えば通常の丸孔の吐出孔から紡出して得られるような繊維断面に代表されるような形状等のいわゆる丸断面であればよい。   The modified cross-section polyamide multifilament of the present invention can suppress the generation of streaks after dyeing by mixing with single yarns having no recesses, and the porosity between single yarns can be reduced. Capillary action works, and when it is made into a fabric, higher water absorption can be imparted. The term “single yarn having no recess” as used herein refers to a single yarn having a shape that does not literally have a recess such as a perfect circle, an ellipse, a lens, a square or a rectangular shape, and a more preferable shape is a perfect circle. . Here, the true circular shape does not need to be strictly a perfect circle, and may be a so-called round cross section such as a shape represented by a fiber cross section obtained by spinning from a normal round hole discharge hole. That's fine.

この混繊異形断面ポリアミドマルチフィラメントの「2つ以上の凹部を有する異形単糸/凹部を有しない単糸」で示される単糸数の比は、0.70〜1.30の範囲であることが吸水性付与の観点から好ましく、さらに好ましくは0.85〜1.15の範囲であり、より好ましくは1.00つまりは同数である。また「2つ以上の凹部を有する異形単糸/凹部を有しない単糸」で示される単糸繊度の比は、染色スジの抑制や吸水性付与の観点から0.70〜1.30の範囲であることが好ましく、さらに好ましくは0.80〜1.20の範囲であり、より好ましくは0.90〜1.10の範囲である。   The ratio of the number of single yarns indicated by “a deformed single yarn having two or more concave portions / single yarn having no concave portions” of the mixed fiber irregular cross-section polyamide multifilament may be in a range of 0.70 to 1.30. From the viewpoint of imparting water absorption, it is preferably in the range of 0.85 to 1.15, more preferably 1.00, that is, the same number. In addition, the ratio of the single yarn fineness indicated by “a deformed single yarn having two or more recessed portions / a single yarn having no recessed portions” is in the range of 0.70 to 1.30 from the viewpoint of suppressing dyeing streaks and imparting water absorption. Preferably, it is in the range of 0.80 to 1.20, more preferably in the range of 0.90 to 1.10.

さらに、混繊異形断面ポリアミドマルチフィラメントにおける凹部を有しない単糸の繊度バラツキ(変動係数CV%)は10%以下であることが染色スジ抑制の観点から好ましく、さらに好ましくは7%以下、より好ましくは5%以下である。   Further, the fineness variation (coefficient of variation CV%) of the single yarn having no concave portion in the mixed fiber irregular cross-section polyamide multifilament is preferably 10% or less from the viewpoint of suppressing dyeing streaks, more preferably 7% or less, more preferably Is 5% or less.

本発明の異形断面ポリアミドマルチフィラメントは、上記のとおり単糸繊度が0.1〜2.0dtexの極細マルチフィラメントであって、且つ異形単糸の断面形状についてひずみやバラツキが小さいものであるが、このような異形断面ポリアミドマルチフィラメントを得るには、以下の製造方法で製造することが重要である。   The irregular cross-section polyamide multifilament of the present invention is an ultrafine multifilament having a single yarn fineness of 0.1 to 2.0 dtex as described above, and has a small distortion and variation with respect to the cross-sectional shape of the irregular single yarn. In order to obtain such a modified cross-section polyamide multifilament, it is important to manufacture by the following manufacturing method.

すなわち、異形断面用の紡糸口金から溶融したポリアミドを紡出し、冷却するにあたり、口金真下に設けられた円柱冷却筒から外周方向に冷却風を吹き出して強制冷却する紡糸方法をとることにより、口金から吐出された各単糸を口金から一定の距離にて一斉に冷却することができ、且つ糸条冷却により熱量をもった冷却風が糸条の外周側に拡散するため糸条の走行領域にて熱量の集中が起こらず、このため各単糸内において冷却筒内周方向と外周方向でのローバル度LBのひずみや、単糸間での形状バラツキが抑制されるのである。   That is, when spinning molten polyamide from a spinneret for deformed cross section and cooling, a spinning method in which cooling air is blown outward from a cylindrical cooling cylinder provided directly below the die to forcibly cool it is used. Each discharged single yarn can be simultaneously cooled at a certain distance from the base, and the cooling air with heat generated by the yarn cooling diffuses to the outer circumference side of the yarn. Concentration of heat does not occur, and for this reason, distortion of the global degree LB in the inner and outer circumferential directions of the cooling cylinder and variation in shape between the single yarns are suppressed in each single yarn.

なお、溶融紡糸温度は、本発明のポリアミドマルチフィラメントが得られる限り制限はなく、通常用いられる温度、例えばポリカプロアミドの場合は240〜260℃、ポリヘキサメチレンアジパミドの場合は275〜295℃が好ましく用いられるが、同じ口金を用いた場合、溶融紡糸時の粘度が高い(例えば溶融紡糸温度が低めの場合や、ポリアミドの粘度が高い場合等)とローバル度が上昇し、粘度が低い(例えば溶融紡糸温度が高めの場合や、ポリアミドの粘度が低い場合等)と、減少する傾向にある。   The melt spinning temperature is not limited as long as the polyamide multifilament of the present invention can be obtained. For example, 240 to 260 ° C. in the case of polycaproamide and 275 to 295 in the case of polyhexamethylene adipamide. ° C is preferably used, but when the same die is used, a high viscosity at the time of melt spinning (for example, when the melt spinning temperature is low, or when the viscosity of polyamide is high) increases the degree of globalization and the viscosity is low. (For example, when the melt spinning temperature is high, or when the viscosity of the polyamide is low, etc.), it tends to decrease.

図3は、上記好ましく用い得る溶融紡糸装置の一例における紡出後給油までの部分の概略を示す概念図である。図3に示したように、紡糸パック1内に設けられ、紡糸孔が環状かつ外周部にのみ配置された紡糸口金2と紡糸口金2から吐出されたフィラメント3は、紡糸口金2の真下で、環状に配置された紡糸孔から紡糸される樹脂よりも内側に位置した冷却装置4から、同冷却装置4の横断面中心部から外向きに向けて、放射状に冷却風5を送出し強制冷却した後、給油装置6により給油し、引き取る方法である。   FIG. 3 is a conceptual diagram showing an outline of a portion up to refueling after spinning in an example of the melt spinning apparatus that can be preferably used. As shown in FIG. 3, the spinneret 2 provided in the spin pack 1, the spinneret 2 having an annular shape and arranged only on the outer peripheral portion, and the filament 3 discharged from the spinneret 2 are directly below the spinneret 2. From the cooling device 4 positioned on the inner side of the resin spun from the annularly arranged spinning hole, the cooling air 5 is sent radially from the center of the cross section of the cooling device 4 to the outside and forcedly cooled. Thereafter, the fuel is supplied by the oil supply device 6 and taken out.

上記において、冷却装置4の位置は冷却開始位置が、口金下面から冷却開始位置までの距離Lとして、20〜70mmの範囲で配置することが重要となる。好ましくは20〜50mmとなるよう配置する。ここでいう冷却開始位置とは、紡糸口金面から冷却装置における冷却風吹き出し口上端部までの長さをいう。冷却開始位置が20mm未満になると、紡糸時に不活性ガスによる口金面のシール効果が小さくなり、口金面汚れが増加することや、冷却風によって口金面の温度が下がり、各単糸の強伸度劣化が発生し糸切れが多発する。逆に冷却開始位置が70mmを越えると、溶融紡糸糸条の口金孔吐出初期の断面形状からのひずみが大きくなり、目標とするローバル度が得られないのみならず、長手方向の繊度ムラが発生したり、溶融紡糸糸条の走行安定性も低下し糸切れも多発する。   In the above, it is important that the cooling device 4 is disposed at a cooling start position in the range of 20 to 70 mm as the distance L from the lower surface of the base to the cooling start position. Preferably, it arrange | positions so that it may become 20-50 mm. The cooling start position here refers to the length from the spinneret surface to the upper end of the cooling air outlet in the cooling device. When the cooling start position is less than 20 mm, the sealing effect of the base surface due to the inert gas during spinning is reduced, the base surface contamination increases, the temperature of the base surface decreases due to cooling air, and the single yarn's high elongation Deterioration occurs and thread breakage occurs frequently. Conversely, when the cooling start position exceeds 70 mm, the distortion from the cross-sectional shape of the melt spun yarn at the initial discharge of the die hole increases, and not only the target degree of globality cannot be obtained, but also the fineness unevenness in the longitudinal direction occurs. In addition, the running stability of the melt-spun yarn is lowered and yarn breakage occurs frequently.

また冷却装置4は、複数個の冷却孔を有する垂直方向に伸びた冷却装置であり、好ましい形状としては円柱状である。冷却装置の冷却風吹き出し部の長さDは100〜600mmの範囲であることが重要である。さらに好ましくは200〜400mmの範囲である。冷却風吹き出し部の長さが100mm未満になると、溶融紡糸糸条の冷却が不十分となり、強伸度の低下や糸切れが多発したり、フィラメントの長手方向での繊維構造バラツキが発生することで織編物にした際に長手で染めムラが発生する。逆に冷却風吹き出し部の長さが600mmを越えると紡糸糸掛け等の作業性が低下する。   The cooling device 4 is a cooling device extending in the vertical direction having a plurality of cooling holes, and has a cylindrical shape as a preferred shape. It is important that the length D of the cooling air blowing portion of the cooling device is in the range of 100 to 600 mm. More preferably, it is the range of 200-400 mm. When the length of the cooling air blowing part is less than 100 mm, the melt-spun yarn is not sufficiently cooled, the tensile strength is decreased and the yarn breakage occurs frequently, or the fiber structure varies in the longitudinal direction of the filament. When woven or knitted, the dyeing unevenness occurs in the longitudinal direction. On the contrary, when the length of the cooling air blowing portion exceeds 600 mm, workability such as spinning yarn is lowered.

また給油装置6は図4に示すような環状型ガイドを用い、溶融紡糸糸条の各単糸がガイドに接地すると共に、環状型ガイド上で油剤を供給することが好ましい。図4は、本発明で好ましく用い得る環状給油装置の一例における概略図であり、油剤供給用スリット8から油剤が供給され、環状型ガイド9(材質としてはセラミックが好ましい)上で給油を行うことができる。これにより単糸間に均一に油剤を付与することができ、紡糸における糸切れや毛羽を抑制することができる。給油装置6の水平方向断面の中心位置は紡糸口金及び冷却筒の水平方向断面の中心を結ぶ線の延長上にあることが好ましく、上下方向の位置、すなわち口金下面から給油位置までの距離Hは糸条収束位置7から200〜1000mm上部にあることが好ましく、さらに好ましくは200〜800mm、より好ましくは200〜600mm上部である。糸条収束位置7からの距離が200mm未満になると、溶融紡糸糸条の屈曲角度が大きくなりすぎるため糸切れの原因となり、また逆に、糸条収束位置7からの距離が1000mmを越えると、溶融紡糸糸条の随伴気流が大きくなり、紡糸張力が大きくなりやはり糸切れの原因となる。   Further, the oil supply device 6 preferably uses an annular guide as shown in FIG. 4, and each single yarn of the melt-spun yarn is grounded to the guide and the oil agent is supplied on the annular guide. FIG. 4 is a schematic view of an example of an annular oil supply device that can be preferably used in the present invention. Oil is supplied from the oil supply slit 8 and oil supply is performed on the annular guide 9 (material is preferably ceramic). Can do. Thereby, an oil agent can be uniformly applied between single yarns, and yarn breakage and fluff in spinning can be suppressed. The center position of the horizontal cross section of the fueling device 6 is preferably on an extension of the line connecting the centers of the spinneret and the horizontal cross section of the cooling cylinder, and the vertical position, that is, the distance H from the bottom surface of the base to the fueling position is It is preferably 200 to 1000 mm above the yarn convergence position 7, more preferably 200 to 800 mm, and more preferably 200 to 600 mm. If the distance from the yarn convergence position 7 is less than 200 mm, the bending angle of the melt-spun yarn becomes too large, causing thread breakage. Conversely, if the distance from the yarn convergence position 7 exceeds 1000 mm, The accompanying airflow of the melt-spun yarn increases, and the spinning tension increases, which also causes yarn breakage.

また糸条収束位置7は、紡糸口金面から500〜1700mm下方にあることが好ましく、さらに好ましくは600〜1000mm下方に配置する。紡糸口金面から糸条収束位置までの距離が500mm未満になると紡糸糸掛け等の作業性が悪化し、また逆に、紡糸口金面から糸条収束位置までの距離が1700mmを超えると、溶融紡糸糸条の随伴気流が大きくなり、紡糸張力が大きくなるため糸切れする可能性がある。   The yarn convergence position 7 is preferably 500 to 1700 mm below the spinneret surface, and more preferably 600 to 1000 mm below. When the distance from the spinneret surface to the yarn converging position is less than 500 mm, workability such as spinning is deteriorated. Conversely, when the distance from the spinneret surface to the yarn converging position exceeds 1700 mm, melt spinning is performed. The accompanying airflow of the yarn is increased, and the spinning tension is increased.

なお、ポリアミドを溶融する際、溶融温度を融点プラス50℃以内とすることで溶融紡糸糸条の強伸度劣化を抑制することが出来るため好ましい。   In addition, when melting polyamide, it is preferable to set the melting temperature within a melting point plus 50 ° C. because deterioration in the strength and elongation of the melt-spun yarn can be suppressed.

また、溶融紡糸時の糸切れ抑制のためには、紡糸口金と冷却装置との間に、蒸気噴出ゾーン等を設け、スチームなどの不活性ガスで紡糸口金面をシールすることが効果的である。噴出させる蒸気の温度は、250〜300℃であることが好ましい。また、蒸気の噴出圧力は0.10〜0.40kPaであることが好ましく、噴出方向は、簡単に装置が設置できる点で、口金外周方向から中心方向に向けて噴出させるのが好ましい。   Moreover, in order to suppress yarn breakage during melt spinning, it is effective to provide a steam ejection zone or the like between the spinneret and the cooling device and seal the spinneret surface with an inert gas such as steam. . The temperature of the vapor to be ejected is preferably 250 to 300 ° C. Moreover, it is preferable that the vapor | steam ejection pressure is 0.10-0.40kPa, and it is preferable to make it eject from the nozzle | cap | die outer peripheral direction toward a center direction at the point which can install an apparatus easily.

また、引取速度を3500〜5500m/分とすることで紡糸時の糸切れや巻取り後の遅延収縮を抑制することが出来、工業生産に適している。   Further, by setting the take-up speed to 3500-5500 m / min, yarn breakage during spinning and delayed shrinkage after winding can be suppressed, which is suitable for industrial production.

これらの製造条件を採用することによって、本発明の異形断面ポリアミドマルチフィラメントを安定して得ることができる。   By adopting these production conditions, the irregularly shaped polyamide multifilament of the present invention can be stably obtained.

以下、実施例に基づいて本発明をさらに具体的に説明する。なお、実施例中の測定、評価項目は以下に述べる方法で測定した。   Hereinafter, the present invention will be described more specifically based on examples. The measurement and evaluation items in the examples were measured by the methods described below.

(1)酸化チタン含有量
サンプル5gを磁性ルツボに入れ、電気炉を用いて1000℃で灰化し、灼熱残分を酸化チタンとして重量%で表した。
(1) Titanium oxide content 5 g of a sample was put in a magnetic crucible and incinerated at 1000 ° C. using an electric furnace, and the ignition residue was expressed as wt% as titanium oxide.

(2)単糸繊度
SEARCH SEIGYO E.M.CO.LTD社製の繊度変動率測定装置を用い、オートバイブロスコープ法により同一フィラメント内における異形断面を有する単糸10本について、6cmの測定試料に自励的な発振を行わせ、試料の振動から検出された微小な電気的信号を増幅して、これを機械的エネルギーに変換し、再び測定試料に振動を与え異形断面単糸の繊度を求めたものを平均したものを単糸繊度の平均値とする。ただし、同一フィラメント内に異形断面を有する単糸が10本未満である場合は同一フィラメント内の全ての異形断面を有する単糸についての平均とする。
(2) Single yarn fineness SEARCH SEIGYO E. M.M. CO. Using a fineness variation rate measuring device manufactured by LTD, a 6 cm measurement sample is subjected to self-excited oscillation for 10 single yarns having an irregular cross section in the same filament by the motorcycle broscope method, and detected from the vibration of the sample. Amplified minute electrical signal is converted into mechanical energy, and the average value of the single yarn fineness is obtained by averaging the values obtained by vibrating the measurement sample again to obtain the fineness of the irregular cross-section single yarn. To do. However, when the number of single yarns having a modified cross section in the same filament is less than 10, the average is obtained for all single yarns having a modified cross section in the same filament.

(3)98%硫酸相対粘度
(a)試料を秤量し、98重量%濃硫酸に試料濃度が1g/100mlとなるように溶解する。
(b)(a)項の溶液をオストワルド粘度計にて25℃での落下秒数(T1)を測定する。
(c)試料を溶解していない98重量%濃硫酸の25℃での落下秒数(T2)を(b)項と同様に測定する。
(d)試料の98%硫酸相対粘度(ηr)を下式により算出する。測定温度は25℃とする。
(ηr)=(T1/T2)。
(3) 98% sulfuric acid relative viscosity (a) A sample is weighed and dissolved in 98% by weight concentrated sulfuric acid so that the sample concentration becomes 1 g / 100 ml.
(B) The solution (a) is measured for the number of seconds (T1) dropped at 25 ° C. using an Ostwald viscometer.
(C) The falling seconds (T2) at 25 ° C. of 98% by weight concentrated sulfuric acid in which the sample is not dissolved are measured in the same manner as in the item (b).
(D) The 98% sulfuric acid relative viscosity (ηr) of the sample is calculated by the following equation. The measurement temperature is 25 ° C.
(Ηr) = (T1 / T2).

(4)凹部のローバル度LBとローバル度LBのバラツキ(変動係数CV%)
パラフィン、ステアリン酸、エチルセルロースからなる包理剤を溶解し、原糸を導入後室温放置により固化させ、包理剤中の原糸を横断面方向に切断したものを東京電子(株)製のCCDカメラ(CS5270)にて繊維横断面を撮影し、ランダムにフィラメントを選択し、そのフィラメント中でランダムに選定した10本の(単糸数が10以下の場合は全ての)2つ以上の凹部を有する異形単糸についてMicro−MEASURE社製のモニタリング装置(EMM−3100)にて画像処理を行い、三菱電機製のカラービデオプロセッサー(SCT−CP710)にて3000倍でプリントアウトした断面写真を用いた。ローバル度LBの測定や、その平均値、標準偏差、変動係数CV%の算出は前記に記載の通り行った。
(4) Variation in the degree of recess LB and LB (coefficient of variation CV%)
A CCD manufactured by Tokyo Denshi Co., Ltd. is prepared by dissolving a packing agent composed of paraffin, stearic acid, and ethyl cellulose, solidifying the yarn by allowing it to stand at room temperature and then cutting the yarn in the packing material in the cross-sectional direction. The cross section of the fiber is photographed with a camera (CS5270), a filament is selected at random, and there are two or more concave portions randomly selected in the filament (all when the number of single yarns is 10 or less). The irregular single yarn was subjected to image processing with a monitoring device (EMM-3100) manufactured by Micro-MEASURE, and a cross-sectional photograph printed at 3000 times with a color video processor (SCT-CP710) manufactured by Mitsubishi Electric was used. The measurement of the degree of global LB and the calculation of the average value, standard deviation, and coefficient of variation CV% were performed as described above.

(5)風合い評価(ソフト感)
20℃×60%RHの室内環境下で、検査者(10人)の評価によって、布帛のドレープ性、ソフト感を次の基準で相対評価した。
◎:ドレープ性・ソフト感が非常にある、
○:ドレープ性には劣るがソフト感がある、
△:ドレープ性・ソフト感が劣る、
×:ドレープ性・ソフト感がない。
(5) Texture evaluation (soft feeling)
Under the indoor environment of 20 ° C. × 60% RH, the drapeability and soft feeling of the fabric were relatively evaluated according to the following criteria by the evaluation of inspectors (10 persons).
◎: Very draped and soft.
○: Inferior to drape but soft
Δ: Inadequate drape and softness,
X: No drape or soft feeling.

(6)吸水性(バイレック法)
JIS L1096(1999)「バイレック法」により測定した。この測定で得られる吸水高さについて、次の基準で評価した。
◎:90mm以上
○:65mm以上90mm未満
△:55mm以上65mm未満
×:55mm未満
(6) Water absorption (Bilec method)
Measured according to JIS L1096 (1999) “Bilec method”. The water absorption height obtained by this measurement was evaluated according to the following criteria.
◎: 90 mm or more ○: 65 mm or more and less than 90 mm Δ: 55 mm or more and less than 65 mm x: less than 55 mm

(7)スジ評価
ポリアミドマルチフィラメント原糸をタテ・ヨコ両方に用い、かつヨコ打ち込み長180cmの平織物を作成し、布帛を酸性染料(Mitsui Nylon Black GL)を用いて染色した。ポリエチレンテレフタレート原糸をタテ・ヨコ方向に用いたヨコ打ち込み長の平織物に関しては、分散染料(Dianix Navy S-2G200%)を用いて染色した。染色後の平織物を透視検反機によって検査者(10人)の評価により、長手方向で100m検反し、次の基準で相対評価した。
◎:スジ、濃淡ムラが全くない、
○:弱いスジ、濃淡ムラが多少見られるが実用可能レベル、
△:弱いスジ、濃淡ムラが多く見られ実用可能レベルではない、
×:強いスジ、濃淡ムラが多く見られ実用可能レベルではない。
(7) Stripe evaluation Using a polyamide multifilament yarn for both warp and weft, a plain weaving length of 180 cm was created, and the fabric was dyed using an acid dye (Mitsui Nylon Black GL). A horizontal woven fabric using polyethylene terephthalate yarn in the vertical and horizontal directions was dyed with a disperse dye (Dianix Navy S-2G200%). The plain fabric after dyeing was inspected 100 m in the longitudinal direction by an inspector (10 persons) using a fluoroscopic inspection machine, and subjected to relative evaluation according to the following criteria.
◎: There are no stripes or uneven shading,
○: Weak streaks and shading unevenness are somewhat visible, but practical level
Δ: A lot of weak streaks and shading unevenness is seen and not at a practical level.
X: A lot of strong stripes and shading unevenness are observed, and it is not at a practical level.

(8)製糸性
1t当たりの製糸糸切れについて、次の基準をもって示した。
◎:糸切れ1.0回未満、
○:糸切れ1.0以上4.0回未満、
△:糸切れ4.0以上7.0回未満、
×:糸切れ7.0回以上または製糸不能。
(8) Spinnability The yarn breakage per ton is shown according to the following criteria.
A: Less than 1.0 thread breakage,
○: Thread breakage 1.0 to less than 4.0 times,
Δ: Yarn break 4.0 or more and less than 7.0 times,
X: Yarn break 7.0 times or more, or yarn cannot be produced.

(9)糸かけ性
紡糸作業における糸かけ作業性について、作業者(50人)が1人ずつ糸かけ作業を行った際にかかる時間について、次の基準をもって評価した。
◎:作業者の90%(45人)以上が5分以内に糸かけを完了できる、
○:作業者の70%(35人)以上90%(45人)未満が5分以内に糸かけを完了できる、
△:作業者の50%(25人)以上70%(35人)未満が5分以内に糸かけを完了できる、
×:作業者の50%(25%)超が5分以内に糸かけを完了できない。
(9) Yarning performance With respect to the threading workability in the spinning operation, the time required for the worker (50 persons) to perform the threading operation one by one was evaluated according to the following criteria.
◎: More than 90% (45 people) of workers can complete threading within 5 minutes.
○: 70% (35 people) or more and less than 90% (45 people) of workers can complete threading within 5 minutes.
Δ: 50% (25 people) or more and less than 70% (35 people) of workers can complete threading within 5 minutes.
X: More than 50% (25%) of workers cannot complete threading within 5 minutes.

総合評価として、次の基準をもって評価した。
◎:風合い評価、吸水性、スジ評価、製糸性、糸かけ性の全項目において○もしくは◎であり、且つ◎の項目が4項目以上あるもの、
○:風合い評価、吸水性、スジ評価、製糸性、糸かけ性の全項目において○もしくは◎であり、且つ◎の数が3項目以下であるもの、
△:風合い評価、吸水性、スジ評価、製糸性、糸かけ性に全項目のうち△もしくは×の項目が1つ以上あり、且つ×の数が1つ以下であるもの、
×:風合い評価、吸水性、スジ評価、製糸性、糸かけ性に全項目のうち△もしくは×の項目が1つ以上あり、且つ×の数が2つ以下であるもの。
As a comprehensive evaluation, the following criteria were used for evaluation.
◎: All items of texture evaluation, water absorption, streak evaluation, yarn-making property, threading property are ○ or ◎, and ◎ has 4 or more items,
○: In all items of texture evaluation, water absorption, streak evaluation, yarn-making property, threading property, ○ or ◎, and the number of ◎ is 3 or less,
Δ: One or more items of Δ or × among all items in texture evaluation, water absorption, streak evaluation, yarn forming property, threading property, and the number of × is 1 or less,
X: One in which at least one item of Δ or x is included in the texture evaluation, water absorption, streak evaluation, yarn-making property, and threading property, and the number of x is two or less.

実施例1
酸化チタンを1.9重量%含む98%硫酸相対粘度2.6のポリカプロアミドを環状に配列した紡糸口金より紡糸温度253℃で溶融ポリマーを吐出させ、該ポリマーを、紡糸口金面に向けて0.25kPaの圧力で285℃の蒸気が噴出されている蒸気噴出ゾーンと、該蒸気噴出ゾーン下流側に設けられ、且つ冷却開始位置30mmで鉛直方向の長さが300mmの単体の円筒型冷却装置で外吹きに放射状に吹く20℃の冷却風にて冷却する冷却ゾーンを通過させて冷却固化を行わせ、該冷却装置下流側にて紡糸口金下面から600mmの位置に環状型給油ガイドを設置し給油を行い、紡速4500m/minにて紡糸し、延伸倍率1.2倍にて延伸させ44dtex/44フィラメントの図1に示すような実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得た。得られた原糸をタテ・ヨコ両方に用い、かつヨコ打ち込み長180cmの平織物を作成した。
Example 1
A molten polymer is discharged at a spinning temperature of 253 ° C. from a spinneret in which polycaproamide having a relative viscosity of 2.6% of 98% sulfuric acid containing 1.9% by weight of titanium oxide is circularly arranged, and the polymer is directed toward the spinneret surface. A steam jet zone in which steam at 285 ° C. is jetted at a pressure of 0.25 kPa, and a single cylindrical cooling device provided downstream of the steam jet zone and having a cooling start position of 30 mm and a vertical length of 300 mm Then, it is cooled and solidified by passing through a cooling zone cooled by 20 ° C. cooling air that blows radially outward, and an annular type oil supply guide is installed at a position 600 mm from the lower surface of the spinneret on the downstream side of the cooling device. Supply oil, spin at a spinning speed of 4500 m / min, draw at a draw ratio of 1.2 times, and release 44 dtex / 44 filaments at equiangular intervals of substantially 120 ° as shown in FIG. To obtain a trilobal cross-section polycaproamide multifilaments are projecting linearly. The obtained raw yarn was used for both warp and width, and a plain woven fabric having a length of 180 cm was created.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例2
フィラメントの断面形状を同数の6葉/丸断面からなる混繊糸とする以外は実施例1と同様の方法にて紡糸を行い、6葉/丸断面混繊ポリカプロアミドマルチフィラメントを得、得られた原糸を用いて実施例1と同様の方法で平織物を作製した。
Example 2
Spinning was performed in the same manner as in Example 1 except that the cross-sectional shape of the filament was the same number of 6-leaf / round cross-section mixed fiber, and a 6-leaf / round cross-section mixed polycaproamide multifilament was obtained. A plain woven fabric was produced in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの異形単糸について、単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   About the deformed single yarn of the polycaproamide multifilament, the single yarn fineness, the cross-sectional shape, the global degree LB (average value, maximum value, minimum value), and the maximum value among the LB variations in the single yarn in each single yarn The single yarn fineness variation, the LB variation between single yarns, the LB variation, the yarn forming property, and the fabric were evaluated. The results are shown in Table 1.

実施例3
44dtex/440フィラメントの繊維とする以外は実施例1と同様の方法にて紡糸を行い、図1に示すような実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 3
Spinning is performed in the same manner as in Example 1 except that the fibers are 44 dtex / 440 filaments, and the three-leaf cross-sectional polycaproamide projecting radially at substantially 120 ° equiangular intervals as shown in FIG. A multifilament was obtained, and a plain woven fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例4
44dtex/22フィラメントの繊維とする以外は実施例1と同様の方法にて紡糸を行い、図1に示すような実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミド繊維を得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 4
Spinning is performed in the same manner as in Example 1 except that the fibers are 44 dtex / 22 filaments, and the three-leaf cross-sectional polycaproamide projecting radially at substantially 120 ° equiangular intervals as shown in FIG. Fibers were obtained, and plain fabrics were prepared in the same manner as in Example 1 using the obtained raw yarns.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例5
実施例1と同様の方法にて紡糸を行った際に、紡糸温度を270℃とする以外は実施例1と同様の方法にて紡糸を行い、図1に示すような実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミド繊維を得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 5
When spinning was performed in the same manner as in Example 1, spinning was performed in the same manner as in Example 1 except that the spinning temperature was 270 ° C., and the equiangularity of 120 ° as shown in FIG. A three-leaf cross-section polycaproamide fiber protruding radially at intervals was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例6
実施例1と同様の方法にて紡糸を行った際に、紡糸温度を235℃とする以外は実施例1と同様の方法にて紡糸を行い、図1に示すような実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミド繊維を得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 6
When spinning was performed in the same manner as in Example 1, spinning was performed in the same manner as in Example 1 except that the spinning temperature was 235 ° C., and an equiangular angle of 120 ° as shown in FIG. A three-leaf cross-section polycaproamide fiber protruding radially at intervals was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例7
単糸横断面形状が実質72°の等角度間隔の放射線状に突起している5葉断面とする以外は実施例1と同様の方法にて紡糸を行い、5葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 7
Spinning was performed in the same manner as in Example 1 except that the cross-sectional shape of the single yarn was a five-leaf cross-section projecting radially at equiangular intervals of substantially 72 °, and a five-leaf cross-section polycaproamide multifilament was obtained. A plain woven fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例8
単糸横断面形状が実質45°の等角度間隔の放射線状に突起している8葉断面とする以外は実施例1と同様の方法にて紡糸を行い、8葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 8
Spinning was carried out in the same manner as in Example 1 except that the cross-sectional shape of the single yarn was an 8-leaf cross-section projecting radially at an equiangular interval of substantially 45 °, and an 8-leaf cross-section polycaproamide multifilament was obtained. A plain woven fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例9
円筒型冷却装置において、冷却開始位置を20mmとする以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 9
In the cylindrical cooling device, except that the cooling start position is set to 20 mm, spinning is performed in the same manner as in Example 1, and the trilobal cross section polycaproamide multi-protrusively projecting radially at substantially equal angular intervals of 120 ° A filament was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例10
円筒型冷却装置において、冷却開始位置を70mmとする以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 10
In the cylindrical cooling device, except that the cooling start position is set to 70 mm, spinning is performed in the same manner as in Example 1, and the three-leaf cross-sectional polycaproamide multi-protrusions projecting radially at substantially equal angular intervals of 120 ° A filament was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例11
円筒型冷却装置の冷却筒の鉛直方向の長さを100mmとする以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 11
A three-lobe cross section projecting in a radial manner at substantially equal angular intervals of 120 ° by spinning in the same manner as in Example 1 except that the length of the cooling cylinder of the cylindrical cooling device is 100 mm. A polycaproamide multifilament was obtained, and a plain woven fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 1.

実施例12
円筒型冷却装置の冷却筒の鉛直方向の長さを600mmとする以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 12
A three-lobe cross-section in which spinning is performed in the same manner as in Example 1 except that the length in the vertical direction of the cooling cylinder of the cylindrical cooling device is 600 mm, and is projected radially at substantially equal angular intervals of 120 ° A polycaproamide multifilament was obtained, and a plain woven fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度バラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Further, the variation in the degree of globality between single yarns, the yarn forming property and the fabric were evaluated. The results are shown in Table 1.

実施例13
環状型給油ガイドにて油剤を付与することなく糸条を環状型ガイドに接地させ、糸条収束位置にて糸条収束型の給油ガイドより給油を行う以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 13
The same method as in Example 1 except that the yarn is grounded to the annular guide without applying an oil agent with the annular lubricant guide, and oil is supplied from the yarn convergence guide at the yarn convergence position. Spinning was performed to obtain a three-leaf cross-section polycaproamide multifilament projecting radially at substantially equal angular intervals of 120 °, and a plain woven fabric was prepared in the same manner as in Example 1 using the obtained raw yarn. .

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度バラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Further, the variation in the degree of globality between single yarns, the yarn forming property and the fabric were evaluated. The results are shown in Table 1.

実施例14
ポリアミドマルチフィラメントを構成するポリマーを酸化チタンを0.3重量%含む98%硫酸相対粘度2.6のポリヘキサメチレンアジパミドとする以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリヘキサメチレンアジパミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Example 14
Spinning was carried out in the same manner as in Example 1 except that the polymer constituting the polyamide multifilament was polyhexamethylene adipamide having a relative viscosity of 2.6% of 98% sulfuric acid containing 0.3% by weight of titanium oxide. A trilobal polyhexamethylene adipamide multifilament projecting radially at 120 ° equiangular intervals was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリヘキサメチレンアジパミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表1に示す。   The single yarn fineness, the cross-sectional shape, the global degree LB (average value, the maximum value, the minimum value) of the polyhexamethylene adipamide multifilament, the maximum value among the variations in the global degree LB within the single yarn in each single yarn, The yarn fineness variation, the roval degree LB variation between single yarns, the yarn-making property and the fabric were evaluated. The results are shown in Table 1.

比較例1
44dtex/880フィラメントで単糸繊度0.05dtexとする以外は実施例1と同様の方法にて紡糸を行った。
Comparative Example 1
Spinning was performed in the same manner as in Example 1 except that 44 dtex / 880 filaments and single yarn fineness of 0.05 dtex were used.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表2に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 2.

比較例2
45dtex/15フィラメントの単糸繊度3.03dtexの繊維とする以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Comparative Example 2
A three-leaf cross-section polycapro that is spun in the same manner as in Example 1 except that the fiber has a single yarn fineness of 3.03 dtex of 45 dtex / 15 filaments and protrudes radially at an equiangular interval of substantially 120 °. An amide multifilament was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表2に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 2.

比較例3
円筒型冷却装置において、吐出ポリマーが冷却装置の内側を通り、該ポリマーに向けて冷却風が放射線状内向きに吹くことで糸条を冷却する以外は実施例1と同様の方法にて紡糸を行い、3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作製した。
Comparative Example 3
In the cylindrical cooling device, spinning is performed in the same manner as in Example 1 except that the discharged polymer passes through the inside of the cooling device, and the cooling air blows radially inward toward the polymer to cool the yarn. A three-leaf cross-section polycaproamide multifilament was obtained, and a plain fabric was produced in the same manner as in Example 1 using the obtained raw yarn.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を図2に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in FIG.

比較例4
円筒型冷却装置において、冷却開始位置を15mmとする以外は実施例1と同様の方法にて紡糸を行い、3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Comparative Example 4
In the cylindrical cooling device, spinning was performed in the same manner as in Example 1 except that the cooling start position was set to 15 mm to obtain a trilobal polycaproamide multifilament, and the obtained raw yarn was used as in Example 1. A plain woven fabric was prepared in the same manner.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表2に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 2.

比較例5
円筒型冷却装置において、冷却開始位置を80mmとする以外は実施例1と同様の方法にて紡糸を行い、3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Comparative Example 5
In a cylindrical cooling device, spinning was performed in the same manner as in Example 1 except that the cooling start position was set to 80 mm to obtain a trilobal polycaproamide multifilament, and the obtained raw yarn was used as in Example 1. A plain woven fabric was prepared in the same manner.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表2に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 2.

比較例6
円筒型冷却装置の冷却筒の鉛直方向の長さを80mmとする以外は実施例1と同様の方法にて紡糸を行い、3葉断面ポリカプロアミドマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Comparative Example 6
Spinning was carried out in the same manner as in Example 1 except that the vertical length of the cooling cylinder of the cylindrical cooling device was 80 mm to obtain a trilobal cross section polycaproamide multifilament, and the obtained raw yarn was used. A plain woven fabric was prepared in the same manner as in Example 1.

該ポリカプロアミドマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキのうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表2に示す。   The single yarn fineness, transverse cross-sectional shape, and global degree LB (average value, maximum value, minimum value) of the polycaproamide multifilament, the maximum value among the fluctuations LB in the single yarn of each single yarn, the single yarn fineness variation Evaluation of LB variation between single yarns, yarn forming property and fabric was performed. The results are shown in Table 2.

比較例7
マルチフィラメントを構成するポリマーをポリエチレンテレフタレートとし、口金より紡糸温度290℃で溶融ポリマーを吐出させる以外は実施例1と同様の方法にて紡糸を行い、実質120°の等角度間隔の放射線状に突起している3葉断面ポリエチレンテレフタレートマルチフィラメントを得、得られた原糸を用い実施例1と同様の方法で平織物を作成した。
Comparative Example 7
Spinning is performed in the same manner as in Example 1 except that the polymer constituting the multifilament is polyethylene terephthalate and the molten polymer is discharged from the die at a spinning temperature of 290 ° C., and the projections are radially formed at substantially equal angular intervals of 120 °. A three-leaf cross-section polyethylene terephthalate multifilament was obtained, and a plain fabric was prepared in the same manner as in Example 1 using the obtained raw yarn.

該ポリエチレンテレフタレートマルチフィラメントの単糸繊度、横断面形状、ローバル度LB(平均値、最大値、最小値)、各単糸における単糸内のローバル度LBバラツキうち最大値、単糸繊度バラツキ、単糸間のローバル度LBバラツキ、製糸性及び布帛評価を行った。結果を表2に示す。   The single yarn fineness, transverse cross-sectional shape, and globality LB (average value, maximum value, minimum value) of the polyethylene terephthalate multifilament, the maximum value, the single yarn fineness variation, and the single yarn fineness variation LB within each single yarn Evaluation was made on the degree of LB variation between yarns, the yarn forming property and the fabric. The results are shown in Table 2.

Figure 0005206640
Figure 0005206640

Figure 0005206640
Figure 0005206640

1:紡糸パック
2:紡糸口金
3:フィラメント
4:冷却装置
5:冷却風
6:給油装置
7:糸条収束位置
8:油剤供給用スリット
9:環状型ガイド
L:口金下面から冷却開始位置までの距離
D:冷却風吹き出し部の長さ
H:口金下面から糸条収束位置までの距離
1: Spin pack 2: Spinneret 3: Filament 4: Cooling device 5: Cooling air 6: Lubricating device 7: Yarn converging position 8: Slitting for oil supply 9: Annular guide L: From the lower surface of the die to the cooling start position Distance D: Cooling air blowing length H: Distance from the bottom of the base to the yarn convergence position

Claims (11)

2つ以上の凹部を有する異形単糸を少なくとも一部に含むポリアミドマルチフィラメントであって、且つ2つ以上の凹部を有する異形単糸が下記の範囲にあることを特徴とするポリアミドマルチフィラメント。
(1)単糸繊度の平均値が0.10〜2.00dtex
(2)単糸内にある各凹部の凹度(ローバル度LB)がそれぞれ5〜50%
(3)単糸内にある各凹部の凹度バラツキ(変動係数CV%)が10%以下
A polyamide multifilament comprising at least part of a deformed single yarn having two or more recessed portions, and the deformed single yarn having two or more recessed portions is in the following range.
(1) The average value of the single yarn fineness is 0.10 to 2.00 dtex
(2) Recessed degree of each recess in the single yarn (Roval degree LB) is 5 to 50%, respectively.
(3) Unevenness variation (coefficient of variation CV%) of each recess in the single yarn is 10% or less
ポリアミドマルチフィラメントを構成するポリマーがポリカプロアミド、ポリヘキサメチレンアジパミドから選ばれた少なくとも1種であることを特徴とする請求項1に記載のポリアミドマルチフィラメント。 2. The polyamide multifilament according to claim 1, wherein the polymer constituting the polyamide multifilament is at least one selected from polycaproamide and polyhexamethylene adipamide. 2つ以上の凹部を有する異形単糸について、3〜8つの凹部と同数の凸部がそれぞれ等角度間隔の放射状に突起していることを特徴とする請求項1または2に記載のポリアミドマルチフィラメント。 3. The polyamide multifilament according to claim 1, wherein the deformed single yarn having two or more concave portions has the same number of convex portions as the three to eight concave portions projecting radially at equal angular intervals. . 凹部を有しない単糸を少なくとも一部に含むことを特徴とする請求項1〜3のいずれかに記載のポリアミドマルチフィラメント。 The polyamide multifilament according to any one of claims 1 to 3, wherein the polyamide multifilament includes at least a part of a single yarn having no recess. 凹部を有しない単糸が真円形断面であることを特徴とする請求項4に記載のポリアミドマルチフィラメント。 The polyamide multifilament according to claim 4, wherein the single yarn having no concave portion has a true circular cross section. 2つ以上の凹部を有する異形単糸について、その単糸繊度のバラツキ(変動係数CV%)が5%以下であることを特徴とする請求項1〜5のいずれかに記載のポリアミドマルチフィラメント。 6. The polyamide multifilament according to claim 1, wherein the irregular single yarn having two or more concave portions has a variation in single yarn fineness (variation coefficient CV%) of 5% or less. 2つ以上の凹部を有する異形単糸について、単糸内にある各凹部の凹度平均値を算出し、その平均値の単糸間バラツキ(変動係数CV%)が10%以下であることを特徴とする請求項1〜6のいずれかに記載のポリアミドマルチフィラメント。 For deformed single yarns having two or more recesses, an average value of the degree of depression of each recess in the single yarn is calculated, and the average value variation (coefficient of variation CV%) is 10% or less. The polyamide multifilament according to any one of claims 1 to 6. 請求項1〜7のいずれかに記載のポリアミドマルチフィラメントを少なくとも一部に有する布帛。 A fabric having at least a part of the polyamide multifilament according to any one of claims 1 to 7. 請求項1〜7のいずれかに記載のポリアミドマルチフィラメントを少なくとも一部に有する繊維製品。 A fiber product having at least a part of the polyamide multifilament according to claim 1. 単糸繊度の平均値が0.10〜2.00dtexの範囲にある2つ以上の凹部を有する異形単糸を少なくとも一部に含むポリアミドマルチフィラメントの溶融紡糸方法であって、紡糸口金外周部に円周状に配された吐出孔を有する紡糸口金の中心部から真下に、円周状に配された吐出孔から吐出された溶融紡糸糸条の内側に溶融紡糸糸条を強制冷却する冷却装置を有しており、且つ冷却装置が下記を満足することを特徴とするポリアミドマルチフィラメントの溶融紡糸方法。
(1)紡糸口金面から冷却装置の冷却開始位置までの距離(L) 20mm≦L≦70mm
(2)冷却装置の冷却風吹き出し部の長さ(D) 100mm≦D≦600mm
A polyamide multifilament melt spinning method comprising at least part of a deformed single yarn having two or more recesses having an average value of single yarn fineness in a range of 0.10 to 2.00 dtex. Cooling device for forcibly cooling the melt-spun yarn inside the melt-spun yarn discharged from the circumferentially arranged discharge hole, directly below the center portion of the spinneret having the discharge holes arranged in the circumference A polyamide multifilament melt spinning method characterized in that the cooling device satisfies the following:
(1) Distance from spinneret surface to cooling start position of cooling device (L) 20 mm ≦ L ≦ 70 mm
(2) Length of cooling air blowing part of cooling device (D) 100 mm ≦ D ≦ 600 mm
溶融紡糸糸条を強制冷却する冷却装置の真下に環状型給油ガイドを有しており、紡糸口金から吐出された溶融紡糸糸条を環状型ガイドに接触させて給油させることを特徴とする請求項10に記載のポリアミドマルチフィラメントの溶融紡糸方法。 An annular oil supply guide is provided directly below a cooling device for forcibly cooling the melt spun yarn, and the melt spun yarn discharged from the spinneret is brought into contact with the annular guide to supply oil. 10. A method for melt spinning polyamide multifilament according to 10.
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