JP2023146101A - False-twisted yarn - Google Patents

Abstract

To provide a false-twisted yarn having high stretchability and natural gloss with suppressed glaring peculiar to false-twisted yarn of synthetic fiber.SOLUTION: A false-twisted yarn has a degree of glaring of 0.001 to 0.010% and a crimp percentage of 20 to 55%.SELECTED DRAWING: Figure 2

Description

本発明は、高いストレッチ性を有しながら、ナチュラルな光沢を発現できる仮撚加工糸に関する。 The present invention relates to a false-twisted yarn that can exhibit natural luster while having high stretchability.

ポリエステルやナイロンを代表とする合成繊維は、機械的特性をはじめ数多くの優れた性質を有しており、一般衣料用途をはじめ産業用途、機能製品まで各種分野に幅広く用いられている。 Synthetic fibers, typified by polyester and nylon, have many excellent properties including mechanical properties, and are used in a wide variety of fields, from general clothing to industrial applications and functional products.

合成繊維は綿やウールといった天然繊維に比べ高い耐久性やハンドリング容易性を有していることから、スポーツ、アウトドア衣料向けインナー用途などに好適に用いられる。 Synthetic fibers are more durable and easier to handle than natural fibers such as cotton and wool, so they are suitable for use as innerwear for sports and outdoor clothing.

特に近年ではスポーツやアウトドアの人気の高まりに伴い、上着を着用しない場面が増加してインナー用途でもファッション性が重視されている。また、スポーツ、アウトドア衣料向けインナー用途では、身体の動きに合わせ生地が伸縮する高いストレッチ性が求められる。 Particularly in recent years, with the increasing popularity of sports and outdoor activities, the number of occasions where outerwear is not worn has increased, and fashionability has become important even when used as an inner layer. In addition, for innerwear applications for sports and outdoor clothing, high stretchability is required, allowing the fabric to expand and contract with the movement of the body.

ストレッチ性を出すためには、延伸仮撚加工を施し捲縮を与えるのが一般的である。 In order to provide stretchability, it is common to apply a stretching and false twisting process to create crimps.

しかし、一般的な丸断面フィラメントを延伸仮撚加工すると、仮撚時の加撚圧縮力によりフィラメントの横断面が変形し、六角形や五角形の平坦な側面を有する多角形断面となる。 However, when a typical round-section filament is drawn and false-twisted, the cross-section of the filament is deformed by the twisting compressive force during false-twisting, resulting in a polygonal cross-section with flat hexagonal or pentagonal sides.

平坦な側面は光を正反射するため、生地にした際に強く輝いて見える点が多くなり、望ましくないギラギラした光沢（以下、ギラツキと称す）が生じる。 Since the flat side surfaces reflect light specularly, many dots appear to shine strongly when made into fabric, resulting in an undesirable glare (hereinafter referred to as glare).

この問題を解決するため、断面形状の異形化が過去より鋭意検討されてきた。 In order to solve this problem, efforts have been made to make the cross-sectional shape irregular.

例えば特許文献１記載では断面形状を凹凸のある多葉型にすることで光の乱反射を促し、ギラツキを抑制する方法が提案されている。また、特許文献２記載では延伸仮撚加工前に事前延伸を行うことでフィラメントのポリマー配向を促進して、延伸仮撚加工による断面形状の平坦化を抑える方法が提案されている。 For example, Patent Document 1 proposes a method of suppressing glare by promoting diffuse reflection of light by making the cross-sectional shape multi-lobed with unevenness. Further, Patent Document 2 proposes a method of promoting polymer orientation of filaments by pre-stretching before stretching and false-twisting, thereby suppressing flattening of the cross-sectional shape due to stretching and false-twisting.

特表２００３－５３４４６３号Special table number 2003-534463 特開２０１６－１８０１９５号公報JP 2016-180195 Publication

しかしながら、特許文献１に記載の多葉形断面糸を仮撚加工すると、延伸仮撚加工前の異形度が高すぎるため、延伸仮撚時に加撚圧力による断面変形の影響を大きく受けて曲線部が平坦化または扁平化する。この直線ライクな部分によって反射光が整い、ギラツキが強くなるためギラツキ抑制効果としては不十分である。また、特許文献２記載では事前延伸でポリマーの配向が促進した状態となるため、仮撚加工で十分な捲縮が付与できない。 However, when the multilobal cross-sectional yarn described in Patent Document 1 is false-twisted, the degree of irregularity before the stretching false-twisting process is too high, so that the curved part is greatly affected by the cross-sectional deformation due to the twisting pressure during the stretching false-twisting process. becomes flattened or flattened. This straight-line-like portion aligns the reflected light and increases glare, which is insufficient to suppress glare. Further, in the method described in Patent Document 2, the orientation of the polymer is promoted by pre-stretching, so that sufficient crimp cannot be imparted by false twisting.

本発明の課題は、上記従来の問題点を解決しようとするものであり、高いストレッチ性を有しながら、ナチュラルな光沢を発現できる仮撚加工糸を提供するものである。 An object of the present invention is to solve the above-mentioned conventional problems, and to provide a false twisted yarn that can exhibit natural luster while having high stretchability.

本発明は、上記課題を解決するために、下記の構成からなる。
（１）ギラツキ度が０．００１～０．０１０％、捲縮率が２０～５５％である仮撚加工糸。
（２）白色顔料の含有量が０～１．５％である（１）記載の仮撚加工糸。
（３）単糸横断面が非円形であって、単糸横断面外周の直線部割合が０～５０．０％の（１）または（２）記載の仮撚加工糸。
（４）単糸繊度が０．５～５．０ｄｔｅｘである（１）～（３）いずれかに記載の仮撚加工糸。
（５）ポリエステルまたはポリアミドを主成分とする（１）～（４）いずれかに記載の仮撚加工糸。 In order to solve the above problems, the present invention consists of the following configuration.
(1) False twisted yarn with a glare degree of 0.001 to 0.010% and a crimp rate of 20 to 55%.
(2) The false twisted yarn according to (1), wherein the white pigment content is 0 to 1.5%.
(3) The false twisted yarn according to (1) or (2), wherein the cross-section of the single yarn is non-circular, and the proportion of straight portions of the outer periphery of the cross-section of the single yarn is 0 to 50.0%.
(4) The false twisted yarn according to any one of (1) to (3), which has a single yarn fineness of 0.5 to 5.0 dtex.
(5) The false twisted yarn according to any one of (1) to (4), which contains polyester or polyamide as a main component.

本発明によれば、高いストレッチ性を有しながら、ナチュラルな光沢を発現できる仮撚加工糸を得ることができる。 According to the present invention, it is possible to obtain a false twisted yarn that can exhibit natural luster while having high stretchability.

図１は、本発明の仮撚加工糸の横断面の一例である。FIG. 1 is an example of a cross section of the false twisted yarn of the present invention. 図２は、単糸横断面外周の直線部と曲線部を説明する模式図。FIG. 2 is a schematic diagram illustrating straight portions and curved portions of the outer periphery of a single yarn cross section. 図３は、本発明の仮撚加工糸を得るに好適な部分配向未延伸糸の単糸横断面の一例である。FIG. 3 is an example of a single yarn cross section of partially oriented undrawn yarn suitable for obtaining the false twisted yarn of the present invention. 図４は、単糸横断面の凹部を説明する模式図。FIG. 4 is a schematic diagram illustrating a concave portion in a cross section of a single yarn. 図５は、異形度の測定位置を示す模式図。FIG. 5 is a schematic diagram showing the measurement position of the degree of irregularity. 図６は、延伸仮撚加工プロセスの概要図。FIG. 6 is a schematic diagram of the stretch false twisting process.

本発明の仮撚加工糸を構成する合成繊維は、熱可塑性ポリマーからなる繊維である。
熱可塑性ポリマーとしては、例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリトリメチレンテレフタレート、ポリ乳酸などのポリエステル、ポリカプロアミド（ポリアミド６）、ポリドデカノアミド（ポリアミド１２）、ポリヘキサメチレンアジパミド（ポリアミド６６）、ポリヘキサメチレンセバカミド（ポリアミド６１０）、ポリヘキサメチレンドデカノアミド（ポリアミド６１２）などのポリアミド、ポリプロピレン、ポリエチレン、ポリウレタンなどのポリオレフィン、これらの組み合わせがあげられる。一般的に衣料用繊維として広く利用されているポリエステルまたはポリアミドが好ましい。 The synthetic fibers constituting the false twisted yarn of the present invention are fibers made of thermoplastic polymer.
Examples of thermoplastic polymers include polyesters such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid, polycaproamide (polyamide 6), polydodecanoamide (polyamide 12), and polyhexamethylene adipamide ( Examples include polyamides such as polyamide 66), polyhexamethylene sebaamide (polyamide 610), and polyhexamethylene dodecanoamide (polyamide 612), polyolefins such as polypropylene, polyethylene, and polyurethane, and combinations thereof. Polyester or polyamide, which are generally widely used as clothing fibers, are preferred.

本発明の仮撚加工糸は、ギラツキ度が０．００１～０．０１０％である。好ましくは０．００５％以下である。本発明でいうギラツキ度は、仮撚加工糸の青色筒編みをデジタルマイクロスコープで明度分布測定し、各明度範囲の積分値から下式（１）により算出した値である。処理・測定条件は後述する実施例で記載する。
ギラツキ度（％）＝［ギラツキ部の面積／測定繊維部の全面積］×１００・・・式（１）
ギラツキ部の面積：反射光の強い明度２５３～２５５の積分値
測定繊維部の全面積：明度０～２５５のうち、バックグラウンドを除いた積分値
値が小さいほど強く輝いて見える点が少なく、かかる範囲とすることで、ナチュラルな光沢と言える。０．０１０％を超える場合、生地にした際、強く輝いて見える点が多く、仮撚加工糸特有のギラギラした光沢となる。 The false twisted yarn of the present invention has a glare degree of 0.001 to 0.010%. Preferably it is 0.005% or less. The degree of glare as used in the present invention is a value calculated by measuring the brightness distribution of the blue tubular knitting of the false twisted yarn using a digital microscope and using the following formula (1) from the integral value of each brightness range. Processing and measurement conditions will be described in Examples below.
Glare degree (%) = [Area of glare part/Total area of measured fiber part] x 100...Formula (1)
Area of the glare part: Measurement of the integral value of brightness of 253 to 255 with strong reflected light Total area of the fiber part: Of the brightness of 0 to 255, the smaller the integral value excluding the background, the fewer the points that appear to shine strongly, and the brightness of the reflected light is strong. By using this range, it can be said that it has a natural luster. If it exceeds 0.010%, many spots will appear to shine strongly when made into fabric, resulting in a glaring luster characteristic of false-twisted yarns.

本発明の仮撚加工糸は、捲縮率が２０～５５％である。好ましくは２５％以上である。
捲縮率２０％未満の場合、生地にした際にストレッチ性が発現しない。捲縮率が高いほどストレッチ性は優れる。一方で、捲縮率を高くするためには加撚圧力を高くするので、断面変形を大きく受けて平坦化または扁平化して、直線部を多く有した断面形状になってしまう。その結果、強く輝いて見える点が多くなり、ナチュラルな光沢は得られない。５５％以下にすることで、生地にした際にストレッチ性とナチュラルな光沢のいずれも満足することができる。 The false twisted yarn of the present invention has a crimp rate of 20 to 55%. Preferably it is 25% or more.
If the crimp rate is less than 20%, stretchability will not be exhibited when it is made into a fabric. The higher the crimp rate, the better the stretchability. On the other hand, in order to increase the crimp rate, the twisting pressure is increased, so the cross-section is greatly deformed and becomes flattened or flattened, resulting in a cross-sectional shape with many straight parts. As a result, many dots appear to shine strongly, and a natural luster cannot be obtained. By setting the content to 55% or less, it is possible to satisfy both stretchability and natural luster when made into fabric.

本発明の仮撚加工糸は白色顔料を１．５重量％以下含有することが好ましい。白色顔料によって、繊維表面に微細な凹凸が発生して小さなスケールで光の乱反射が促進されてギラツキを抑制する。白色顔料の含有量が多い程、断面形状による光沢調整効果は薄れるので、白色顔料の含有量は１．５重量％以下で顕著にギラツキを抑制する効果が発現してナチュラルな光沢が得られる。さらに好ましくは、１．０重量％以下である。白色顔料としては、例えば、酸化チタン、酸化アルミニウム、シリカおよび酸化マグネシウム等が挙げられる。屈折率が高く、光散乱効果の高い、酸化チタンが好ましく用いられる。 The false twisted yarn of the present invention preferably contains 1.5% by weight or less of a white pigment. The white pigment creates fine irregularities on the fiber surface, promoting diffuse reflection of light on a small scale and suppressing glare. The higher the content of the white pigment, the less the gloss adjustment effect due to the cross-sectional shape, so when the content of the white pigment is 1.5% by weight or less, the effect of suppressing glare is significantly exhibited and natural gloss can be obtained. More preferably, it is 1.0% by weight or less. Examples of the white pigment include titanium oxide, aluminum oxide, silica, and magnesium oxide. Titanium oxide, which has a high refractive index and a high light scattering effect, is preferably used.

本発明の仮撚加工糸を構成する単糸横断面は、非円形である。非円形とは、図１に例示されるように複数の微細な凹凸を有し、図２に示すような平坦な直線部分が少ない状態とする。 The cross section of the single yarn constituting the false twisted yarn of the present invention is non-circular. Non-circular means that it has a plurality of fine irregularities as illustrated in FIG. 1 and has few flat straight parts as shown in FIG. 2.

直線部が多くなるほど、一定方向に光が反射する作用が働き、ギラツキが発現しやすくなる。従って、単糸横断面外周のうち直線部割合が低い断面（平坦な直線部分が少ない状態）とすることで、光が一定方向に反射する平面を減らし、よりナチュラルな光沢を発現することができる。直線部割合は５０．０％以下であることが好ましい。さらに好ましくは４０．０％以下である。
本発明でいう直線部割合は、画像解析ソフトを用いて測定した単糸横断面外周の直線部の合計距離と単糸横断面外周距離から下式（２）により算出した値である。測定条件は後述する実施例で記載する。
直線部割合（％）＝［単糸横断面外周の直線部の合計距離／単糸横断面外周距離］×１００・・・式（２）
直線部：単糸横断面外周のうち曲率０～０．０１の部分
曲率：単糸横断面外周上に等間隔に３５点のｘ－ｙ座標プロットを行い、連続する３点を円フィッティングした円半径の逆数。
なお、仮撚加工糸の特性上、加撚時の糸条において、単糸同士の凹凸の噛み合い具合、配置によって断面形状にバラツキが生じるため、ここでいう直線部割合は、糸条を構成する全単糸の中で、直線部割合の最も高い値を［糸条を構成する単糸数／６］個選定し、その平均値を直線部割合とした。 The more straight parts there are, the more the light is reflected in a certain direction, and the more glare occurs. Therefore, by creating a cross section with a low proportion of straight parts (few flat straight parts) in the outer periphery of the single yarn cross section, it is possible to reduce the number of planes that reflect light in a certain direction and create a more natural luster. . The straight portion ratio is preferably 50.0% or less. More preferably, it is 40.0% or less.
The linear portion ratio in the present invention is a value calculated by the following formula (2) from the total distance of the straight portions of the outer periphery of the single yarn cross section and the outer circumferential distance of the single yarn cross section measured using image analysis software. The measurement conditions will be described in the examples below.
Straight section ratio (%) = [total distance of straight sections on the outer periphery of the single yarn cross section / distance on the outer periphery of the single yarn cross section] x 100...Formula (2)
Straight section: Partial curvature of 0 to 0.01 on the outer circumference of the single yarn cross section Curvature: A circle obtained by plotting the x-y coordinates of 35 points at equal intervals on the outer circumference of the single yarn cross section, and fitting the three consecutive points with a circle. Reciprocal of radius.
In addition, due to the characteristics of false-twisted yarn, the cross-sectional shape of the yarn during twisting varies depending on the engagement and arrangement of the unevenness between single yarns, so the straight portion ratio here refers to the proportion of the yarn that constitutes the yarn. Among all the single yarns, the one with the highest straight part ratio [number of single threads constituting the yarn/6] was selected, and the average value thereof was taken as the straight part ratio.

本発明の仮撚加工糸の単糸繊度は０．５～５．０ｄｔｅｘであることが好ましい。単糸繊度が細いほど光の乱反射性は上がり、よりナチュラルな光沢を発現する。さらに好ましくは３．０ｄｔｅｘ以下である。 The single yarn fineness of the false twisted yarn of the present invention is preferably 0.5 to 5.0 dtex. The finer the filament, the more diffusely reflected light will be, creating a more natural luster. More preferably, it is 3.0 dtex or less.

本発明の仮撚加工糸のウースター斑は、１．０％以下であることが好ましい。 The Worcester spot in the false twisted yarn of the present invention is preferably 1.0% or less.

これより、本発明の仮撚加工糸の製造方法の一例について、詳述する。 An example of the method for producing the false twisted yarn of the present invention will now be described in detail.

本発明の仮撚加工糸は、熱可塑性ポリマーを溶融紡糸して部分配向未延伸糸を得た後に、延伸仮撚加工して仮撚加工糸を得る。 The false twisted yarn of the present invention is obtained by melt-spinning a thermoplastic polymer to obtain a partially oriented undrawn yarn, and then by drawing and false twisting the yarn to obtain a false twisted yarn.

部分配向未延伸糸の溶融紡糸方法としては、熱可塑性ポリマーを溶融したのち、ギヤポンプにて計量、輸送して、紡糸口金から吐出して糸条を形成する。該糸条にチムニー等の糸条冷却装置によって冷却風を吹きあてて冷却固化したのち、給油装置で給油するとともに集束し、次いで流体処理装置で交絡してローラーで引き取り、巻き取る。糸は、いわゆるＰａｒｔｉａｌｌｙ Ｏｒｉｅｎｔｅｄ Ｙａｒｎ（ＰＯＹ：部分配向未延伸糸）に分類されるものであり、その製造方法は、ＰＯＹ・ＤＴＹ方式に準拠する。 The melt spinning method for partially oriented undrawn yarn involves melting a thermoplastic polymer, measuring and transporting it using a gear pump, and discharging it from a spinneret to form a yarn. After the yarn is cooled and solidified by blowing cooling air onto the yarn using a yarn cooling device such as a chimney, it is oiled and bundled using an oil supply device, and then intertwined with a fluid treatment device, taken up by a roller, and wound up. The yarn is classified as a so-called Partially Oriented Yarn (POY: partially oriented undrawn yarn), and its manufacturing method conforms to the POY/DTY method.

本発明において用いる部分配向未延伸糸の単糸横断面形状を、図３に例示する。
部分配向未延伸糸の単糸横断面の凹部個数は、仮撚加工時に凹凸が噛み合い難い４、５、７、８個が好ましい。この場合、単糸の凹凸が噛み合い難く、糸条の単糸配置においては隙間のある状態（最密充填構造が生じない状態）で加撚圧力が加わるため、得られる仮撚加工糸の単糸横断面形状は複数の微細な凹凸を有し、平坦な直線部が少なくなる。従って、光が一定方向に反射する平面が減り、ギラツキ度や直線部割合を制御することができる。 The cross-sectional shape of a single yarn of the partially oriented undrawn yarn used in the present invention is illustrated in FIG.
The number of recesses in the single yarn cross section of the partially oriented undrawn yarn is preferably 4, 5, 7, or 8 so that the recesses are difficult to interlock with each other during false twisting. In this case, the unevenness of the single yarns is difficult to interlock, and the twisting pressure is applied when there are gaps in the single yarn arrangement (close-packed structure does not occur), so the single yarn of the false twisted yarn is obtained. The cross-sectional shape has a plurality of fine irregularities, and there are fewer flat straight parts. Therefore, the number of planes on which light is reflected in a certain direction is reduced, and the degree of glare and the proportion of straight parts can be controlled.

凹部個数が３個または６個の場合、仮撚加工時に単糸の凹凸が噛み合い易い。凹凸が噛み合った最密充填構造状態で糸条に加撚圧力が加わることで、得られる仮撚加工糸の単糸断面形状が多角形状になり易く、平坦部（直線的な側面）が形成される。この平坦部が一定方向の光を反射する作用をもたらし、ギラツキが発現し、ギラツキ度が高くなる。 When the number of recesses is 3 or 6, the recesses and recesses of the single yarn are likely to interlock during false twisting. By applying twisting pressure to the yarn in a close-packed structure with interlocking irregularities, the single yarn cross-sectional shape of the resulting false-twisted yarn tends to be polygonal, and a flat part (straight side surface) is formed. Ru. This flat portion has the effect of reflecting light in a certain direction, causing glare and increasing the degree of glare.

また、部分配向未延伸糸の単糸横断面は、外接円半径（Ｒ）と内接円半径（ｒ）の比から算出する異形度（Ｒ／ｒ）が１．１～１．５が好ましい。かかる範囲の異形度とすることで、後述する延伸仮撚加工を施しても、加撚圧力による断面の平坦化が小さく、微細な凹凸を維持した直線部割合の低い仮撚加工糸が得られる。これより、光が一定方向に反射する平面が減り、ギラツキ度や直線部割合を制御することができる。部分配向未延伸糸の単糸横断面の凹部個数が４，５，７，８個でもＲ／ｒが１．１未満の場合、凹部が浅くなり加撚圧力により凹凸は平坦化されやすく直線部が増えてギラツキ度が増す傾向である。Ｒ／ｒが１．５を超える場合、凹凸間に曲率の低い箇所が多く存在している状態のため、仮撚加工糸の単糸横断面には直線部が増えてギラツキ度が増しやすい。より好ましいＲ／ｒは１．２～１．３である。 In addition, the single yarn cross section of the partially oriented undrawn yarn preferably has a degree of irregularity (R/r) of 1.1 to 1.5, which is calculated from the ratio of the circumscribed circle radius (R) and the inscribed circle radius (r). . By setting the degree of irregularity within this range, even when subjected to the stretch false twisting process described later, the flattening of the cross section due to the twisting pressure is small, and a false twisted yarn with a low ratio of straight parts that maintains fine irregularities can be obtained. . This reduces the number of planes on which light is reflected in a certain direction, making it possible to control the degree of glare and the proportion of straight parts. Even if the number of recesses in the single yarn cross section of the partially oriented undrawn yarn is 4, 5, 7, or 8, if R/r is less than 1.1, the recesses become shallow and the unevenness is likely to be flattened by the twisting pressure, resulting in straight portions. There is a tendency for the degree of glare to increase as the amount of glare increases. When R/r exceeds 1.5, there are many low curvature points between the unevenness, so the cross section of the single yarn of the false twisted yarn has an increased number of straight lines, which tends to increase the degree of glare. More preferable R/r is 1.2 to 1.3.

ポリマー、単糸繊度、異型度により適宜冷却方法を選定するが、異形度を調整するためにポリマーを冷却することが重要であり、環状冷却装置を用いることが好ましい。 An appropriate cooling method is selected depending on the polymer, single fiber fineness, and degree of irregularity, but it is important to cool the polymer in order to adjust the degree of irregularity, and it is preferable to use an annular cooling device.

部分配向未延伸糸の製造において、引取速度は２５００～４０００ｍ／分の範囲であることが好ましい。この範囲で巻き取った部分配向未延伸糸を延伸仮撚加工することで、目的の断面と捲縮を兼ね備えた仮撚糸を生産性良く得ることができる。 In the production of partially oriented undrawn yarn, the take-off speed is preferably in the range of 2,500 to 4,000 m/min. By stretching and false twisting the partially oriented undrawn yarn wound in this range, false twisted yarn having both the desired cross section and crimp can be obtained with high productivity.

次いで、好適な仮撚加工方法について述べる。 Next, a suitable false twisting method will be described.

図６に例示する延伸（摩擦）仮撚加工プロセスにおいて、延伸摩擦仮撚加工装置に部分配向未延伸糸を供給し、所望の糸道ガイドや流体処理装置を介して供給ローラーへと送る。その後、加熱された仮撚ヒーター、冷却板および延伸摩擦仮撚を行う施撚体を通して延伸ローラーに導かれ、仮撚加工糸として巻き取る。 In the draw (friction) false twisting process illustrated in FIG. 6, partially oriented undrawn yarn is supplied to a draw friction false twisting device and sent to feed rollers via a desired yarn path guide and fluid handling device. Thereafter, the yarn is guided to a stretching roller through a heated false twisting heater, a cooling plate, and a twisting body that performs stretching friction false twisting, and is wound up as a false twisted yarn.

延伸摩擦仮撚としては、供給ローラー以前に熱ピンやホットプレートによる延伸を加えられた後、摩擦仮撚加工を行ってもよいし、供給ローラーと延伸ローラーの間で延伸されながら摩擦仮撚加工を行ってもよい。 For stretch friction false twisting, friction false twisting may be performed after stretching with a hot pin or hot plate before the supply roller, or friction false twisting may be performed while being stretched between the supply roller and the stretching roller. You may do so.

仮撚数Ｔは、１５０００／（総繊度）^１／２≦Ｔ≦３００００／（総繊度）^１／２とするのが好ましい。仮撚数をこの範囲とすることで、加撚圧力による断面変形を抑えながら、十分な捲縮を付与することができる。 The false twist number T is preferably 15000/(total fineness) ^1/2 ≦T≦30000/(total fineness) ^1/2 . By setting the number of false twists within this range, sufficient crimp can be imparted while suppressing cross-sectional deformation due to twisting pressure.

施撚体の形態はピン、ベルト、フリクションディスク等が挙げられる。 Examples of the form of the twisted body include pins, belts, friction disks, and the like.

加撚圧力による断面変形を抑制し、非円形断面となる仮撚加工糸を得るためには、フリクションディスクを使用することが好ましい。所望の捲縮（捲縮率）と断面（直線部割合）になるようフリクションディスクの材質（ウレタン、アルミ）、径（４０～６０ｍｍ）、枚数（４～１２枚）、間隔（０．４～０．６ｍｍ）、回転数（４０００～９０００ｒｐｍ）は適宜調整する。 In order to suppress cross-sectional deformation due to twisting pressure and obtain a false-twisted yarn having a non-circular cross-section, it is preferable to use a friction disk. The material (urethane, aluminum), diameter (40 to 60 mm), number of discs (4 to 12 discs), and spacing (0.4 to 12 discs) to achieve the desired crimp (crimp ratio) and cross section (straight section ratio). 0.6 mm) and the rotation speed (4000 to 9000 rpm) as appropriate.

延伸速度は３００～８００ｍ／分の範囲であることが好ましい。この範囲で生産すると糸切れが多発することがなく、収率よく生産することができる。延伸倍率は紡糸条件、加工条件により適正化するが、１．２～２．０倍の範囲が好ましい。 The stretching speed is preferably in the range of 300 to 800 m/min. When produced within this range, yarn breakage does not occur frequently and production can be achieved with good yield. The stretching ratio is optimized depending on spinning conditions and processing conditions, but is preferably in the range of 1.2 to 2.0 times.

仮撚時に加熱するヒーターとしては接触式、非接触式ともに使用することができる。捲縮を付与するためには、ヒーター内部を通過する糸の温度が使用ポリマーの結晶化温度以上、融点以下であると好ましく、ポリエステル、ポリアミドでは接触式ヒーター温度は１６０～２００℃の範囲が好ましい。仮撚ヒーター温度を高温とすると捲縮率は高くなるが、断面形状の変化が大きくなる。 As a heater for heating during false twisting, both contact and non-contact types can be used. In order to provide crimp, it is preferable that the temperature of the thread passing through the heater is above the crystallization temperature and below the melting point of the polymer used, and for polyester and polyamide, the contact heater temperature is preferably in the range of 160 to 200°C. . If the temperature of the false-twisting heater is increased, the crimp rate will increase, but the change in cross-sectional shape will increase.

加熱方法、加工速度、糸の総繊度によってその挙動は異なるため、所望の捲縮（捲縮率）と断面（ギラツキ度、直線部割合）になるよう適宜調整する。 Since the behavior differs depending on the heating method, processing speed, and total fineness of the yarn, adjustments are made as appropriate to obtain the desired crimp (crimp ratio) and cross section (glare degree, proportion of straight parts).

仮撚加工糸をパッケージに巻き取る前に、交絡と油剤を付与することが好ましい。これにより解舒性が向上し、製編織時の工程通過性が良好となる。 It is preferable to apply entanglement and oil to the false twisted yarn before winding it into a package. This improves unwinding properties and improves process passability during weaving and weaving.

以下、実施例を挙げて本発明を具体的に説明するが、本発明はこれらの実施例に限定されるものではない。実施例における特性値の測定法は以下のとおりである。 EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples. The method of measuring characteristic values in the examples is as follows.

（１）凹部個数
部分配向未延伸糸をメタクリル樹脂にて包埋し、繊維軸に垂直に切断し、デジタルマイクロスコープ（キーエンス社製ＶＨＸ－５０００）を用いて糸条を構成する単糸の観察像を撮影した。撮影した断面写真について、図４に示すように単糸横断面外周と単糸横断面外周を最短距離で内包する最短外周の間に存在する箇所の個数を部分配向未延伸糸の凹部個数とした。 (1) Number of recesses Partially oriented undrawn yarn is embedded in methacrylic resin, cut perpendicular to the fiber axis, and the single yarns constituting the yarn are observed using a digital microscope (Keyence Corporation VHX-5000). I took a picture of the statue. Regarding the taken cross-sectional photographs, as shown in Figure 4, the number of locations existing between the outer circumference of the single yarn cross section and the shortest outer circumference that includes the outer circumference of the single yarn cross section at the shortest distance was defined as the number of recesses in the partially oriented undrawn yarn. .

（２）異形度
部分配向未延伸糸をメタクリル樹脂にて包埋し、繊維軸に垂直に切断し、デジタルマイクロスコープ（キーエンス社製ＶＨＸ－５０００）を用いて糸条を構成する単糸の観察像を撮影した。撮影した断面写真について、図５に示すように、単糸横断面の外接円半径（図５ 線Ｒ）を内接円半径（図５ 線ｒ）で除した値を求めた。外接円とは、単糸横断面の全面積を内包する最小半径の円であり、内接円とは、単糸横断面の内側に形成できる最大半径の円のことである。 (2) Degree of irregularity Partially oriented undrawn yarn is embedded in methacrylic resin, cut perpendicular to the fiber axis, and the single yarns constituting the yarn are observed using a digital microscope (VHX-5000 manufactured by Keyence Corporation). I took a picture of the statue. Regarding the cross-sectional photographs taken, as shown in FIG. 5, the value obtained by dividing the radius of the circumscribed circle (line R in FIG. 5) of the single yarn cross section by the radius of the inscribed circle (line r in FIG. 5) was determined. The circumscribed circle is a circle with the smallest radius that includes the entire area of the cross-section of a single yarn, and the inscribed circle is the circle with the maximum radius that can be formed inside the cross-section of a single yarn.

（３）直線部割合
仮撚加工糸をメタクリル樹脂にて包埋し、繊維軸に垂直に切断し、デジタルマイクロスコープ（キーエンス社製ＶＨＸ－５０００）を用いて糸条を構成する単糸の観察像を撮影した。
撮影した断面写真について、画像解析ソフトを用い、単糸横断面外周の直線部の合計距離と単糸横断面外周距離を測定する。
単糸横断面外周上に等間隔のｘ－ｙ座標プロットを３５点行った。連続する３点を最小二乗法により円フィッティングし、その円半径の逆数である曲率を算出した。３５点間すべての曲率を算出し、曲率０～０．０１の部分を直線部とし、式（２）から直線部割合を求めた。
なお、糸条を構成する全単糸の中で、直線部割合の最も高い値を［糸条を構成する単糸数／６］個選定し、その平均値を直線部割合とした。
直線部割合（％）＝［単糸横断面外周の直線部の合計距離／単糸横断面外周距離］×１００・・・式（２） 。 (3) Straight part ratio The false twisted yarn is embedded in methacrylic resin, cut perpendicular to the fiber axis, and the single yarns constituting the yarn are observed using a digital microscope (VHX-5000 manufactured by Keyence Corporation). I took a picture of the statue.
For the cross-sectional photograph taken, use image analysis software to measure the total distance of the straight portion of the outer circumference of the single yarn cross section and the distance around the outer circumference of the single yarn cross section.
Thirty-five equally spaced xy coordinate plots were made on the outer circumference of the single yarn cross section. Three consecutive points were fitted to a circle using the least squares method, and the curvature, which is the reciprocal of the radius of the circle, was calculated. The curvatures of all 35 points were calculated, and the portion with a curvature of 0 to 0.01 was defined as a straight line portion, and the straight line portion ratio was determined from equation (2).
In addition, among all the single yarns constituting the yarn, [number of single yarns constituting the yarn/6] with the highest value of the straight portion ratio was selected, and the average value thereof was taken as the straight portion ratio.
Straight section ratio (%) = [total distance of straight sections on the outer periphery of the single yarn cross section/external distance of the single yarn cross section] x 100...Equation (2).

（４）捲縮率
仮撚加工糸を周長１．０ｍの検尺機にて１０回巻きしてカセ取りした後、このカセに繊度×０．００２×１０（巻取回数）×２／１．１１１ｇの初加重をかけて、９０℃×２０分間熱水処理し、脱水後１２時間以上放置する。放置後のカセに初荷重と繊度×０．１×１０（巻取回数）×２／１．１１１ｇの測定加重をかけて室温の水中に垂下し２分間放置し、カセの長さを測りＬとする。さらに、測定荷重を除き初荷重だけにした室温の水中で３分間放置し、カセの長さを測りＬ１とする。下式（３）から、捲縮率を求めた。
捲縮率（％）＝［（Ｌ－Ｌ１）／Ｌ］×１００・・・式（３） 。 (4) Crimp rate After winding the false twisted processed yarn 10 times using a measuring machine with a circumference of 1.0 m and removing it from the skein, fineness x 0.002 x 10 (number of windings) x 2/ Applying an initial load of 1.111 g, hot water treatment at 90° C. for 20 minutes, and after dehydration, leave for 12 hours or more. After standing, the skein was placed under a measurement weight of initial load and fineness x 0.1 x 10 (number of windings) x 2/1.111g, suspended in room temperature water for 2 minutes, and the length of the skein was measured (L). shall be. Furthermore, the skein was left in water at room temperature for 3 minutes with only the initial load removed, and the length of the skein was measured and taken as L1. The crimp ratio was determined from the following formula (3).
Crimp rate (%) = [(L-L1)/L] x 100...Equation (3).

（５）単糸繊度
仮撚加工糸を解舒張力１／１１．１（ｇ／ｄｔｅｘ）で枠周１．０ｍの検尺機で１００回巻き、天秤を用いて重量を測定し、１００倍した重量を、糸条を形成する単糸の本数で除した値を単糸繊度とした。 (5) Wrap the single yarn fineness false twisted yarn 100 times with an unwinding tension of 1/11.1 (g/dtex) using a measuring machine with a frame circumference of 1.0 m, measure the weight using a balance, and multiply it by 100 times. The value obtained by dividing the weight by the number of single yarns forming the yarn was defined as the single yarn fineness.

（６）ウースター斑
ｚｅｌｌｗｅｇｅｒ社製ＵＳＴＥＲ ＴＥＳＴＥＲ ＵＴ－４を用いて、糸のトータル繊度により使用する測定用スロットルを選択した後、糸速２５ｍ／分、撚り数５０００Ｔ／ｍの条件にて１分間測定することにより得た。 (6) Using USTER TESTER UT-4 manufactured by Worcester Mottling Zellweger, select the measurement throttle to be used depending on the total fineness of the yarn, and then measure for 1 minute at a yarn speed of 25 m/min and a twist number of 5000 T/m. Obtained by doing.

（７）白色顔料（酸化チタン）含有量
部分配向未延伸糸５ｇを磁性ルツボに入れ、電気炉を用いて１０００℃で灰化し、灼熱残分を白色顔料（酸化チタン）として重量％で表した。 (7) White pigment (titanium oxide) content 5 g of partially oriented undrawn yarn was placed in a magnetic crucible and incinerated at 1000°C using an electric furnace, and the burnt residue was expressed as white pigment (titanium oxide) in weight%. .

（８）ギラツキ度
仮撚加工糸で、小池機械製作所社製一口型筒編機（ゲージ数：２２）を用いて目付８５ｇ／ｍ^２で筒編地を作製した。
筒編地を下記マイクロスコープ測定条件で明度の中心値が１５０～１６０になるように下記染料濃度を適宜調整し青染色した。
青染色した筒編地を幅１０ｃｍ×長さ２０ｃｍの黒色プレートに通し、デジタルマイクロスコープ（キーエンス社製ＶＨＸ－５０００）を用いて下記条件で明度分布を測定する。反射光の強い明度２５３～２５５範囲をギラツキ部とした。黒色プレートの明度０～８０範囲を除いた明度８１～２５５範囲を測定繊度部とした。上記明度範囲の積分値（面積）を算出し、式（１）からギラツキ度を求めた。
[染料]
ポリエステル：Ｄｉｎａｎｉｘ Ｎａｖｙ Ｓ－２Ｇ２００％（分散染料）
ナイロン：ＴｅｌｏｎＢｌｕｅＭ－ＰＬＷ（アリザリン染料）
ギラツキ度（％）＝［ギラツキ部の面積／測定繊維部の全面積］×１００・・・式（１）
［マイクロスコープ測定条件］
倍率：５０倍
光軸方向：同軸落射
照明明度：２５５
測定明度：０～２５５
シャッタースピード：０．００３秒
ゲイン：１．５ｄＢ
測定面積：９．０４ｍｍ^２ 。 (8) Glare degree A tubular knitted fabric with a fabric weight of 85 g/m ² was produced using a one-piece tubular knitting machine (gauge number: 22) manufactured by Koike Kikai Seisakusho Co., Ltd. using the false twisted yarn.
The tubular knitted fabric was dyed blue under the following microscope measurement conditions by appropriately adjusting the dye concentration below so that the center value of brightness was 150 to 160.
The blue-dyed tubular knitted fabric is passed through a black plate with a width of 10 cm and a length of 20 cm, and the brightness distribution is measured using a digital microscope (VHX-5000 manufactured by Keyence Corporation) under the following conditions. The brightness range of 253 to 255 where the reflected light is strong was defined as the glare part. The lightness range of 81 to 255 excluding the lightness range of 0 to 80 of the black plate was taken as the measured fineness part. The integral value (area) of the above brightness range was calculated, and the degree of glare was determined from equation (1).
[dye]
Polyester: Dinanix Navy S-2G200% (disperse dye)
Nylon: TelonBlueM-PLW (alizarin dye)
Glare degree (%) = [Area of glare part/Total area of measured fiber part] x 100...Formula (1)
[Microscope measurement conditions]
Magnification: 50x Optical axis direction: Coaxial epi-illumination Brightness: 255
Measurement brightness: 0-255
Shutter speed: 0.003 seconds Gain: 1.5dB
Measurement area: 9.04 mm ² .

（９）光沢
上記（８）の青染色した筒編地を、熟練の検査員１０名に対して比較例１（丸断面部分配向未延伸糸を延伸仮撚加工したもの）を基準とし、以下の３段階にて光沢を評価した。
最も多い得票を得たランクを評価とした。合格レベルは◎と○である。
◎：ナチュラルな光沢である。比較例１対比強く輝いて見える点が少なく、ギラツキ感がない。
○：ギラツキ感があるが、比較的弱い。
×：比較例１対比同等もしくは強く輝いて見える点が多く、ギラツキ感がある。 (9) Gloss The blue-dyed tubular knitted fabric from (8) above was tested by 10 experienced inspectors using Comparative Example 1 (stretched and false-twisted yarn partially oriented in round cross section) as a reference. The gloss was evaluated in three stages.
The rank that received the most votes was used as the evaluation. The passing level is ◎ and ○.
◎: Natural luster. Compared to Comparative Example 1, there are fewer spots that appear to shine strongly, and there is no glare.
○: There is a feeling of glare, but it is relatively weak.
×: Same as Comparative Example 1, or there are many points that appear to shine strongly, giving a sense of glare.

（１０）ストレッチ性
上記（８）の青染色した筒編地を、熟練の検査員１０名がストレッチ性の検査を実施した。以下の３段階にてストレッチ性を評価した。合格レベルは◎と○である。
◎：ストレッチ性が極めて良好である。
○：ストレッチ性が良好である。
×：ストレッチ性がない。 (10) Stretchability The blue-dyed tubular knitted fabric of (8) above was tested for stretchability by 10 experienced inspectors. Stretchability was evaluated in the following three stages. The passing level is ◎ and ○.
◎: Stretchability is extremely good.
○: Good stretchability.
×: No stretchability.

（実施例１）
２４ホール、孔形状が八葉の紡糸口金を使用して、温度２９０℃にて酸化チタン濃度０．３％のポリエチレンテレフタレート（以下、ＰＥＴ）を溶融紡糸後、口金面から３５ｍｍの位置にて環状冷却装置を用いて冷却風を吹き付け、油剤を供給し集束させ、紡糸速度２５００ｍ／分の速度で巻取り、総繊度８４ｄｔｅｘ、２４フィラメント、変形度１．３、八葉断面のＰＥＴ部分配向未延伸糸を採取した。 (Example 1)
After melt-spinning polyethylene terephthalate (hereinafter referred to as PET) with a titanium oxide concentration of 0.3% at a temperature of 290°C using a spinneret with 24 holes and an eight-lobed hole shape, a ring was formed at a position 35 mm from the spinneret surface. Cooling air is blown using a cooling device, an oil agent is supplied and concentrated, and the yarn is wound up at a spinning speed of 2,500 m/min, with a total fineness of 84 dtex, 24 filaments, deformation degree of 1.3, and partially oriented unstretched PET with an eight-leaf cross section. The thread was collected.

図６に示す３軸摩擦型フリクションディスクタイプの延伸摩擦仮撚加工機にて、仮撚ヒーター温度を１８０℃（加熱接触式熱板ヒーター設定温度）、延伸倍率を１．５８倍に設定し、ウレタンディスク直径５１ｍｍ、ディスク枚数９枚、ディスク間距離０．４ｍｍ仮撚数２５０００にて、延伸仮撚加工を施して交絡付与を行い、紙管に巻き取り、５６ｄｔｅｘ、２４フィラメントのＰＥＴ仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 In the 3-axis friction friction disk type stretching friction false twisting machine shown in Fig. 6, the false twisting heater temperature was set at 180°C (heating contact type hot plate heater setting temperature), and the stretching ratio was set at 1.58 times. Urethane disk diameter 51 mm, number of disks 9, distance between disks 0.4 mm, number of false twists 25000, stretch false twisting process to impart entanglement, wind up in a paper tube, 56 dtex, 24 filament PET false twist process Got the thread. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例２）
孔形状が四葉の紡糸口金を使用して、異形度１．３、四葉断面とした以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 2)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that a spinneret with a four-lobed hole shape was used, the degree of irregularity was 1.3, and the cross-section was made four-lobed. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例３）
孔形状が五葉の紡糸口金を使用して、異形度１．３、五葉断面とした以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 3)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that a spinneret with a five-lobed hole shape was used, the degree of irregularity was 1.3, and the cross-section was five-lobed. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例４）
孔形状が七葉の紡糸口金を使用して、異形度１．３、七葉断面とした以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 4)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that a spinneret with a seven-lobed hole shape was used, the degree of irregularity was 1.3, and the cross-section was made seven-lobed. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例５）（実施例６）
実施例１と同様に部分配向未延伸糸を採取し、仮撚加工時のヒーター温度を表１記載のとおり変更した以外は、実施例１と同様に仮撚加工し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 5) (Example 6)
Partially oriented undrawn yarn was collected in the same manner as in Example 1, and false-twisted in the same manner as in Example 1, except that the heater temperature during false-twisting was changed as shown in Table 1, to obtain a false-twisted yarn. Ta. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例７）（実施例８）
酸化チタン含有量を表１記載のとおり変更した以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 7) (Example 8)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that the titanium oxide content was changed as shown in Table 1. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例９）（実施例１０）
口金孔設計を変更し、異形度を表１記載のとおり変更した以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 9) (Example 10)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that the design of the die hole was changed and the degree of irregularity was changed as shown in Table 1. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例１１）（実施例１２）
口金孔ホール数を表１記載のとおり変更した以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 (Example 11) (Example 12)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that the number of die holes was changed as shown in Table 1. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例１３）
２４ホール、孔形状が八葉の紡糸口金を使用して、温度２５５℃にて酸化チタン含有していないポリブチレンテレフタレート（以下、ＰＢＴ）を溶融紡糸し、口金から１１６ｍｍの位置にて一方向冷却装置を用いて冷却風を吹き付け、油剤を供給し集束させ、紡糸速度２５００ｍ／分の速度で巻取り、総繊度７７ｄｔｅｘ、２４フィラメント、変形度１．２、八葉断面のＰＥＴ部分配向未延伸糸を採取した。 (Example 13)
Using a 24-hole, eight-lobed spinneret, polybutylene terephthalate (hereinafter referred to as PBT) that does not contain titanium oxide was melt-spun at a temperature of 255°C, and unidirectionally cooled at a position 116 mm from the spinneret. Cooling air is blown using a device, oil is supplied and concentrated, and the yarn is wound at a spinning speed of 2500 m/min to produce partially oriented undrawn PET yarn with a total fineness of 77 dtex, 24 filaments, deformation degree of 1.2, and an octave cross section. was collected.

延伸倍率を１．３７倍に変更した以外は、実施例１と同様に仮撚加工し、５６ｄｔｅｘ、２４フィラメントのＰＢＴ仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 False twisting was carried out in the same manner as in Example 1, except that the stretching ratio was changed to 1.37 times, to obtain a PBT false twisted yarn of 56 dtex and 24 filaments. The obtained false twisted yarn had good properties as shown in Table 1.

（実施例１４）
２４ホール、孔形状が八葉の紡糸口金を使用して、温度２７５℃にて酸化チタン０．３％のポリカプロアミド（以下、Ｎ６）を溶融紡糸し、口金から５７ｍｍの位置にて環状冷却装置を用いて冷却風を吹き付け、油剤を供給し集束させ、紡糸速度２５００ｍ／分の速度で巻取り、総繊度７０ｄｔｅｘ、２４フィラメント、変形度１．４、八葉断面のＮ６部分配向未延伸糸を採取した。 (Example 14)
Polycaproamide containing 0.3% titanium oxide (hereinafter referred to as N6) was melt-spun at a temperature of 275°C using a 24-hole, eight-lobed spinneret, and annularly cooled at a position 57 mm from the spinneret. Using a device, cooling air is blown, oil is supplied and concentrated, and the yarn is wound at a spinning speed of 2500 m/min, with a total fineness of 70 dtex, 24 filaments, a degree of deformation of 1.4, and an N6 partially oriented undrawn yarn with an octalobal cross section. was collected.

延伸倍率を１．２４倍、ヒーター温度を１７５℃に変更した以外は、実施例１と同様に仮撚加工し、５６ｄｔｅｘ、２４フィラメントのＮ６仮撚加工糸を得た。得られた仮撚加工糸は、表１に示すとおり、良好な性質を持っていた。 False twisting was carried out in the same manner as in Example 1 except that the draw ratio was changed to 1.24 times and the heater temperature was changed to 175° C. to obtain N6 false twisted yarn of 56 dtex and 24 filaments. The obtained false twisted yarn had good properties as shown in Table 1.

（比較例１）
孔形状が丸型の紡糸口金を使用して、丸断面とした以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、高いストレッチ性は得られるものの、ギラツキ感がありナチュラルな光沢は得られなかった。 (Comparative example 1)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that a spinneret with round holes was used to obtain a round cross section. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. Although the resulting false twisted yarn had high stretchability, it had a shiny feel and did not have a natural luster.

（比較例２）
孔形状がＹ型の紡糸口金を使用して、異形度１．３、三葉断面とした以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。 (Comparative example 2)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that a spinneret with Y-shaped holes was used, the degree of irregularity was 1.3, and the cross section was trilobal. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn.

（比較例３）
孔形状が六葉の紡糸口金を使用して、異形度１．３、六葉断面とした以外は、実施例１と同様に部分配向未延伸糸を得た。仮撚加工についても実施例１と同様に実施し、仮撚加工糸を得た。得られた仮撚加工糸は、高いストレッチ性は得られるものの、ギラツキ感がありナチュラルな光沢は得られなかった。 (Comparative example 3)
A partially oriented undrawn yarn was obtained in the same manner as in Example 1, except that a spinneret with a six-lobed hole shape was used, the degree of irregularity was 1.3, and the cross-section was made six-lobed. False twisting was also carried out in the same manner as in Example 1 to obtain a false twisted yarn. Although the resulting false twisted yarn had high stretchability, it had a shiny feel and did not have a natural luster.

（比較例４）
実施例１と同様に部分配向未延伸糸を採取し、仮撚加工時のヒーター温度を１５０℃に変更した以外は、実施例１と同様に仮撚加工し、仮撚加工糸を得た。仮撚加工糸を得た。得られた仮撚加工糸は、ナチュラルな光沢が得られるものの、ストレッチ性が劣るものとなった。 (Comparative example 4)
A partially oriented undrawn yarn was collected in the same manner as in Example 1, and false-twisted in the same manner as in Example 1, except that the heater temperature during false-twisting was changed to 150° C., to obtain a false-twisted yarn. A false twisted yarn was obtained. Although the obtained false twisted yarn had a natural luster, it had poor stretchability.

（比較例５）
実施例１と同様に部分配向未延伸糸を採取し、仮撚加工時のヒーター温度を２３５℃に変更した以外は、実施例１と同様に仮撚加工し、仮撚加工糸を得た。仮撚加工糸を得た。得られた仮撚加工糸は、高いストレッチ性は得られるものの、ギラツキ感がありナチュラルな光沢は得られなかった。 (Comparative example 5)
A partially oriented undrawn yarn was collected in the same manner as in Example 1, and false-twisted yarn was obtained in the same manner as in Example 1, except that the heater temperature during the false-twisting process was changed to 235°C. A false twisted yarn was obtained. Although the resulting false twisted yarn had high stretchability, it had a shiny feel and did not have a natural luster.

ａ：曲線部
ｂ：直線部
ｃ：凹部
ｄ：外周路
ｅ：最短外周路
ｆ：外接円半径
ｇ：内接円半径
ｈ：未延伸糸
ｉ：第１フィードローラー
ｊ：第１ヒーター
ｋ：冷却板
ｌ：仮撚具
ｍ：第２フィードローラー
ｎ：第２ヒーター
ｏ：第３フィードローラー
ｐ：エアーノズル
ｑ：第４フィードローラー
ｒ：巻取ローラー
ｓ：パッケージ a: Curved section b: Straight section c: Concave section d: Outer circumferential path e: Shortest outer circumferential path f: Circumscribed circle radius g: Inscribed circle radius h: Undrawn yarn
i: 1st feed roller
j: 1st heater
k: cooling plate
l: false twisting tool m: second feed roller n: second heater o: third feed roller p: air nozzle q: fourth feed roller r: take-up roller s: package

Claims (5)

ギラツキ度が０．００１～０．０１０％、捲縮率が２０～５５％である仮撚加工糸。 False twisted yarn with a glare degree of 0.001 to 0.010% and a crimp rate of 20 to 55%. 白色顔料の含有量が１．５重量％以下である請求項１記載の仮撚加工糸。 The false twisted yarn according to claim 1, wherein the content of white pigment is 1.5% by weight or less. 単糸横断面が非円形であって、単糸横断面外周の直線部割合が５０．０％以下である請求項１または２に記載の仮撚加工糸。 The false twisted yarn according to claim 1 or 2, wherein the cross section of the single yarn is non-circular, and the ratio of straight portions of the outer periphery of the cross section of the single yarn is 50.0% or less. 単糸繊度が０．５～５．０ｄｔｅｘである請求項１～３のいずれかに記載の仮撚加工糸。 The false twisted yarn according to any one of claims 1 to 3, having a single yarn fineness of 0.5 to 5.0 dtex. 糸の構成成分がポリエステルまたはポリアミドである請求項１～４のいずれかに記載の仮撚加工糸。 The false twisted yarn according to any one of claims 1 to 4, wherein the component of the yarn is polyester or polyamide.

Images