JP2020070530A - Modified cross-section crimped hollow filament - Google Patents

Modified cross-section crimped hollow filament Download PDF

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JP2020070530A
JP2020070530A JP2018207303A JP2018207303A JP2020070530A JP 2020070530 A JP2020070530 A JP 2020070530A JP 2018207303 A JP2018207303 A JP 2018207303A JP 2018207303 A JP2018207303 A JP 2018207303A JP 2020070530 A JP2020070530 A JP 2020070530A
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hollow
core
fiber
fin
orthogonal
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千秋 近藤
Chiaki Kondo
千秋 近藤
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帝人フロンティア株式会社
Teijin Frontier Co Ltd
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Abstract

To provide a modified cross-section crimped hollow filament with three-dimensional crimping properties and less hollow crushing to allow obtaining a material having sufficient crimping properties, and having excellent bulkiness and lightweight feeling when made into a textile, and also having heat retention properties.SOLUTION: There is provided a modified cross-section crimped hollow filament that comprises: a core portion having at least one hollow portion; and projection portions protruding radially from the outer surface of the core portion to the center of the core portion in the fiber cross section orthogonal to the fiber axis direction, and that satisfies the following features (1) to (3): (1) a number of projection portions is four or more; (2) a three-dimensional crimping has a number of crimping of 30/25 mm or more; and (3) a hollow portion crushing ratio of the single yarn cross section is 1.5 or less.SELECTED DRAWING: Figure 1

Description

本発明は、中空部を有する異型捲縮長繊維に関する。さらに詳しくは、嵩高性やソフト感、ドライ感などの優れた風合いを有し、かつ軽量性、保温性にも優れた立体捲縮性を有する中空異形捲縮長繊維に関するものである。   The present invention relates to atypical crimped filament having a hollow portion. More specifically, the present invention relates to hollow deformed crimped filaments having excellent texture such as bulkiness, softness, and dryness, and having three-dimensional crimping properties that are excellent in lightness and heat retention.
合成繊維は、その優れた特性から一般衣料用分野をはじめ各種分野に広く利用されている。衣料用途では、特に嵩高感のある風合いを得るため、仮撚加工などの天然繊維を模した繊維への嵩高性の付与技術が種々検討されてきた。一方、布帛に対しより軽量感を付与する目的で、繊維を中空化して利用することが従来から行われている。しかしながら中空繊維に仮撚加工を施すと繊維断面が大きく変形し、それに伴い中空部が潰れてしまい、軽量感が損なわれる問題を有していた(特許文献1)。また、仮撚後も中空部を確保する方法として、芯部に易水溶解性ポリマーを配した芯鞘型複合繊維を用い、仮撚加工後に芯部を溶出する方法が提案されている(特許文献2)。   Synthetic fibers are widely used in various fields including general clothing fields because of their excellent properties. In clothing applications, various techniques for imparting bulkiness to fibers simulating natural fibers, such as false twisting, have been investigated in order to obtain a texture that is particularly bulky. On the other hand, it has been conventionally practiced to hollowize and utilize fibers for the purpose of imparting a lighter feeling to the fabric. However, when false-twisting is applied to the hollow fiber, the cross section of the fiber is largely deformed, the hollow part is crushed accordingly, and there is a problem that the lightweight feeling is impaired (Patent Document 1). Further, as a method of securing a hollow portion even after false twisting, a method of using a core-sheath type composite fiber in which a readily water-soluble polymer is arranged in a core portion and eluting the core portion after false twisting has been proposed (Patent Reference 2).
しかし、この方法では工程が煩雑となり、中空となる芯部の変形も免れず本来の軽量感を得難いものであった。   However, in this method, the process becomes complicated, and the hollow core portion is unavoidably deformed, and it is difficult to obtain the original lightweight feeling.
また、仮撚加工以外で繊維に捲縮を付与した繊維として、固有粘度の異なる二種類のポリエステルをサイドバイサイド型に配した中空繊維が提案されている(特許文献3)。この方法では、捲縮性は得られるものの、2種類のポリマーを使用するため工程性など製造面での制約が大きいという問題を有していた。   In addition, as fibers obtained by crimping fibers other than false twisting, hollow fibers in which two types of polyesters having different intrinsic viscosities are arranged side-by-side have been proposed (Patent Document 3). With this method, although crimpability is obtained, there is a problem in that there are large restrictions in terms of manufacturing such as processability because two types of polymers are used.
さらに、中空繊維からなる微細捲縮繊維として乾熱時に自己伸長する繊維が提案されている(特許文献4)。しかし、この繊維は、微細捲縮を有するものの、繊維断面の異型度が低く嵩高性には劣る他、熱処理時に自己伸長するため混繊糸など用途が限定され汎用性に乏しいものであった。   Furthermore, as fine crimped fibers made of hollow fibers, fibers that self-expand upon dry heat have been proposed (Patent Document 4). However, although this fiber has fine crimps, it has a low degree of irregularity in the cross section of the fiber and is inferior in bulkiness, and since it self-expands during heat treatment, it has limited versatility such as a mixed fiber and has poor versatility.
一方で、繊維に嵩高性を付与した中空部を有する捲縮糸として突起部を有する異型断面繊維が提案されている(特許文献5)。しかしながら、立体捲縮性を有する特殊嵩高糸の製糸方法として、紡糸時に異方冷却時に異方効果が発現されるような条件(風速、冷却位置、冷却長さ、風温など)を適宜選択するのみでは捲縮性能発現させるには限界があり、得られる立体捲縮性能は異なる為、より捲縮性、嵩高性、柔らかい風合い、ストレッチ性、且つ軽量化に優れた立体捲縮性を有する特殊嵩高糸が強く望まれていた。   On the other hand, a modified cross-section fiber having a protrusion is proposed as a crimped yarn having a hollow portion in which the fiber is made bulky (Patent Document 5). However, as a method for producing a special bulky yarn having a three-dimensional crimp property, conditions (wind speed, cooling position, cooling length, wind temperature, etc.) that produce an anisotropic effect during anisotropic cooling during spinning are appropriately selected. There is a limit in developing crimping performance by itself, and the obtained three-dimensional crimping performance is different, so a special crimping property that is more excellent in crimping, bulkiness, soft texture, stretchability, and weight saving Bulky yarn was strongly desired.
また、中空異型断面の中空率や空隙率などを規定し、嵩高性を付与した中空部を有する捲縮糸として突起部を有する異型断面繊維が提案されている(特許文献6)。しかしながらこの製糸方法では、時に中空潰れやフィン折れなどが生じ、中空部とフィン部の形成が不安定であり、伸長回復率は低くかつ捲縮形態(捲縮数)は粗く少ない場合、嵩高感や軽量感が失われており、より安定した中空とフィン形成、より捲縮形態(捲縮数)ある中空異形捲縮長繊維が求められている。   Further, there has been proposed a modified cross-section fiber having protrusions as a crimped yarn having a hollow part having bulkiness, which defines the hollowness and porosity of the hollow modified cross-section (Patent Document 6). However, in this yarn making method, hollow collapse and fin breakage sometimes occur, the formation of the hollow portion and the fin portion is unstable, the elongation recovery rate is low, and the crimped form (number of crimps) is coarse and small. There is a demand for hollow deformed continuous filaments that have a more stable hollow and fin formation, and have a more crimped form (crimp number), without losing the feeling of lightness and lightness.
特開2002−249936号公報JP-A-2002-249936 特開2000−314036号公報JP, 2000-314036, A 特開2003−183938号公報JP, 2003-183938, A 特開平11−140721号公報JP, 11-140721, A 特開2000−212845号公報JP, 2000-212845, A 特開2018−95977号公報JP, 2008-95977, A
本発明の目的は、上記従来技術を背景になされたものであり、十分な捲縮性を有し、布帛とした際に優れた嵩高性と軽量感、さらには保温性をも具備するものを得ることが可能な立体捲縮性を有する中空潰れが少ない中空異形捲縮長繊維を提供することにある。   It is an object of the present invention, which has been made against the background of the above-mentioned prior art, that has sufficient crimpability, and has excellent bulkiness and lightweight feeling when made into a fabric, and further has heat retention. The object is to provide a hollow deformed continuous filament having a three-dimensional crimpability and capable of being obtained and having a small amount of hollow crushing.
本発明者らは上記の課題を達成するため鋭意検討した結果、以下本発明を完成するに至った。   The present inventors have conducted extensive studies to achieve the above-mentioned object, and as a result, have completed the present invention.
かくして、本発明は、
1.繊維軸方向に対して直交する繊維横断面において、少なくとも1個の中空部を備えるコア部と、コア部外表面からコア部中心に対して放射状に突出したフィン部を有し、下記(1)〜(3)を満たすことを特徴とする中空異型捲縮長繊維である。
(1)フィン部が4枚以上である。
(2)捲縮数が30個/25mm以上の立体捲縮である。
(3)単糸断面の中空部潰れ比が1.5以下である。
そして、以下2〜8に記載の発明が好ましい。
2.前記繊維を構成する成分が、ポリトリメチレンテレフタレートを主たる成分とする前記1の中空異型捲縮長繊維。
3.繊維軸方向に対して直交する繊維横断面において、以下の式を満足する前記1または2の中空異型捲縮長繊維。
フィン部の外接円直径 > フィン部の内接円直径 × 2.00
4.コア部の中空率が20〜60%である、前記1〜3の中空異型捲縮長繊維。
5.空隙率が40〜70%である、前記1〜4のいずれかの中空異型捲縮長繊維。
6.100℃、20分の沸水処理後の全捲縮率(TC)が5〜40%である前記1〜5のいずれかに記載の中空異型捲縮長繊維。
7.破断強度が1.6〜2.6cN/dtexである、前記1〜6のいずれかに記載の中空異型捲縮長繊維。
8.スパイラル状三次元捲縮および/またはサインカーブ状捲縮により立体捲縮性が付与されている、請求項1〜7のいずれかに記載の中空異型捲縮長繊維。
Thus, the present invention
1. In a fiber cross section orthogonal to the fiber axis direction, a core part having at least one hollow part and a fin part radially protruding from the outer surface of the core part toward the center of the core part are provided, and the following (1) To (3) are satisfied, which is a hollow atypical crimped filament.
(1) There are four or more fins.
(2) The number of crimps is 30/25 mm or more.
(3) The hollow portion collapse ratio of the single yarn cross section is 1.5 or less.
The inventions described in 2 to 8 below are preferable.
2. The hollow modified crimped filament according to the above 1, wherein the component constituting the fiber is polytrimethylene terephthalate as a main component.
3. The hollow modified crimped filament according to the above 1 or 2, which satisfies the following expression in a fiber cross section orthogonal to the fiber axis direction.
Circumscribed circle diameter of fin> Inscribed circle diameter of fin x 2.00
4. 1 to 3 described above, wherein the hollow portion of the core has a hollow ratio of 20 to 60%.
5. The hollow atypical crimped filament according to any one of 1 to 4 above, which has a porosity of 40 to 70%.
6. The hollow variant crimped filament according to any one of 1 to 5 above, which has a total crimp rate (TC) of 5 to 40% after boiling water treatment at 100 ° C for 20 minutes.
7. The hollow modified crimped filament according to any one of 1 to 6 above, which has a breaking strength of 1.6 to 2.6 cN / dtex.
8. The hollow modified crimped filament according to any one of claims 1 to 7, wherein the three-dimensional spiral crimp and / or the sinusoidal crimp imparts a three-dimensional crimp property.
そして、別の発明として、
9.前記1〜8のいずれかの中空異形捲縮長繊維の製造方法であって、紡糸速度が1500〜3500m/分であり、口金面の下から10〜60mmの位置で、口金面と平行、かつ吐出ポリマー流を貫通するように一方向から風速0.5〜5.0m/秒の空気を吹き付けて口金から吐出したポリマー流を異方冷却することを特徴とする中空異形捲縮長繊維の製造方法、
である。
And as another invention,
9. The method for producing a hollow deformed crimped filament according to any one of 1 to 8 above, wherein the spinning speed is 1500 to 3500 m / min, the position is 10 to 60 mm from below the spinneret surface, and the spinneret surface is parallel to the spinneret surface, and Manufacture of hollow deformed continuous filaments characterized by anisotropically cooling a polymer flow discharged from a die by blowing air at a wind speed of 0.5 to 5.0 m / sec from one direction so as to penetrate the discharged polymer flow. Method,
Is.
中空潰れが少ない中空異形捲縮長繊維によって嵩高性や軽量性、保温性に優れた繊維・布帛を提供することができる。   It is possible to provide a fiber / cloth excellent in bulkiness, lightness, and heat retention by using hollow deformed crimped fibers having little hollow collapse.
本発明の立体捲縮性を有する中空異型捲縮長繊維の断面模式図の一例。An example of a cross-sectional schematic diagram of the hollow deformed continuous filament having three-dimensional crimpability of the present invention. 本発明の立体捲縮性を有する中空異型捲縮長繊維の断面模式図の一例。An example of a cross-sectional schematic diagram of the hollow deformed continuous filament having three-dimensional crimpability of the present invention. 本発明の中空異型捲縮糸を製造する紡糸口金の吐出孔の断面模式図。The cross-sectional schematic diagram of the discharge hole of the spinneret which manufactures the hollow profile crimped yarn of this invention. 本発明の中空潰れの模式図。The schematic diagram of the hollow collapse of this invention.
以下、本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail.
(立体捲縮)
本発明の中空異形捲縮長繊維は立体捲縮を付与されているが、この立体捲縮はスパイラル状三次元捲縮および/またはサインカーブ状捲縮であることが好ましい。これらの立体捲縮であることで、平面的な機械捲縮より高い嵩高感を得ることができる。なお、スパイラル状三次元捲縮とは、繊維軸方向に対して糸条が「らせん状」に旋回している形態の捲縮である。また、サインカーブ状捲縮とは、繊維軸の直角方向に対し一定の振幅を有する2次元の波形様屈曲形が発現している形態の捲縮である。この3次元捲縮の径および単位繊維長当たりの捲縮数は異方冷却されることで決まるといってよく、冷却効果が大きいほど捲縮数が小さく、単位繊維長あたりの捲縮数は多くなる。要求される捲縮捲縮は、捲縮径が小さく、単位繊維長さ当たりの捲縮数が多い(伸長特性に優れ、見映えが良い)、捲縮の耐ヘタリ性が良い(伸長回復に応じた捲縮のヘタリ量が小さく、ストレッチ保持性に優れる)、さらには捲縮の伸長回復時におけるヒステリシスロスが小さい(弾発性に優れ、フィット感がよい)等である。
(Three-dimensional crimp)
The hollow profile crimped filament of the present invention is provided with a three-dimensional crimp, and this three-dimensional crimp is preferably a spiral three-dimensional crimp and / or a sine curve crimp. By using these three-dimensional crimps, it is possible to obtain a feeling of bulkiness higher than that of a planar mechanical crimp. The spiral three-dimensional crimp is a crimp in a form in which the yarn is "helical" turned in the fiber axis direction. Further, the sine curve crimp is a crimp in a form in which a two-dimensional wavy bending shape having a constant amplitude with respect to the direction perpendicular to the fiber axis is developed. It can be said that the diameter of this three-dimensional crimp and the number of crimps per unit fiber length are determined by anisotropic cooling. The greater the cooling effect, the smaller the number of crimps, and the number of crimps per unit fiber length is Will increase. The required crimp crimps have a small crimp diameter, a large number of crimps per unit fiber length (excellent elongation characteristics and good appearance), and good crimp resistance (for elongation recovery). Corresponding crimps have a small amount of sagging and are excellent in stretch retainability), and further, there is little hysteresis loss when the crimps are expanded and recovered (excellent elasticity and good fit).
また、フィラメント糸条の長さ方向に形成される捲縮の位相は、糸条を構成させる全単繊維の捲縮位相が揃った場合、一本のフィラメント糸条は一本のバネ状の糸条となる。この糸条を用いた編地はふくらみを持ったソフト感を有し、嵩高感あるトータルバランスに優れた中空異型捲縮長繊維となる。この糸条を用いた編地の要求物性を満足するためには25mm当たりの捲縮数が重要であり、捲縮数は30〜40個/25mm以上、好ましくは40個以上/25mm以上である。このとき、捲縮数が30個/25mm未満である場合、細かなシボやソフト感などを満足することが難しい。   When the phases of crimps formed in the lengthwise direction of the filament yarn are the same as those of all the single fibers constituting the yarn, one filament yarn is one spring-like yarn. It becomes the article. A knitted fabric using this yarn has a soft feeling with a bulge, and is a hollow deformed continuous filament having a bulky feeling and excellent in total balance. The number of crimps per 25 mm is important for satisfying the required physical properties of the knitted fabric using this yarn, and the number of crimps is 30 to 40 pieces / 25 mm or more, preferably 40 pieces / 25 mm or more. .. At this time, when the number of crimps is less than 30 pieces / 25 mm, it is difficult to satisfy fine texture and softness.
(強度)
本発明の中空異形捲縮長繊維は、破断強度が1.6〜2.6cN/dtex以上であることが必要であり、好ましくは1.8〜2.4cN/dtex以上である。破断強度が1.6cN/dtex未満であると、中空潰れやフィン折れなどが生じ、中空部とフィン部の形成が不安定となり、嵩高感や軽量感が失われて実用に適したものとならない。また破断強度が2.6cN/dtexを超えると、ソフト感、風合いの欠けるものとなる。
(Strength)
The hollow deformed crimped filament of the present invention needs to have a breaking strength of 1.6 to 2.6 cN / dtex or more, and preferably 1.8 to 2.4 cN / dtex or more. If the breaking strength is less than 1.6 cN / dtex, hollow collapse and fin breakage occur, the formation of the hollow part and the fin part becomes unstable, and the bulkiness and lightness are lost and it is not suitable for practical use. .. If the breaking strength exceeds 2.6 cN / dtex, the softness and texture will be lacking.
(コア部)
本発明の中空異形捲縮長繊維を構成する単糸は、繊維軸方向に対して直交する繊維横断面において、少なくとも1個の中空部を備えるコア部と、コア部外表面から突出するフィン部から構成される。コア部は中空部を有する。コア部にある中空部の形状は、例えば、丸形、四角形または四角形以外の多角形とすることができ、なかでも丸形あるいは四角形が好ましい。
コア部に中空部を備えることで、軽量な嵩高糸とすることができ、中空部の形状を丸形あるいは四角形とすることで、図3に例示するような紡糸口金の各吐出スリットにおいて吐出ポリマー同士を良好に貼り合わせることができ、単糸の中空部を有する断面形状を安定して得ることができる。
(Core part)
The single yarn constituting the hollow deformed crimped filament of the present invention comprises a core portion having at least one hollow portion and a fin portion protruding from the outer surface of the core portion in a fiber cross section orthogonal to the fiber axis direction. Composed of. The core part has a hollow part. The shape of the hollow portion in the core portion can be, for example, a round shape, a square shape, or a polygonal shape other than a square shape, and among them, a round shape or a square shape is preferable.
By providing a hollow portion in the core portion, a lightweight bulky yarn can be obtained, and by making the shape of the hollow portion round or quadrangular, the discharge polymer in each discharge slit of the spinneret as illustrated in FIG. It is possible to satisfactorily bond them to each other, and it is possible to stably obtain a cross-sectional shape having a hollow portion of a single yarn.
コア部に備える中空部の個数は、少なくとも1個は必要である。軽量感など、中空繊維による特徴が発現しやすいことから1個であることが好ましい。   The number of hollow portions provided in the core portion must be at least one. The number of the hollow fibers is preferably one because the hollow fiber is likely to exhibit characteristics such as a lightweight feeling.
(中空潰れ)
本発明の中空異形捲縮長繊維のマルチフィラメントを構成する単糸のコア部の中空形状潰れ比(コア部の長辺/短辺の比)は1.5以下が必要である。好ましくは1.3以下、さらに好ましくは1.1であり、最も好ましくは1.0で中空潰れが無い真円の状態である。ここで中空潰れ比は下記式で定義される。
中空潰れ比 =a/b
a:コア部の長辺
b:コア部の短辺
また、中空潰れの模式図を図4に示す。中空潰れ比が1.5を超えると、空気を含む量が少なくなって保温性が低下したり、捲縮性能による嵩高性が発現できなくなる。
(Hollow collapse)
The hollow shape collapse ratio (ratio of long side / short side of core part) of the core portion of the single yarn constituting the multifilament of the hollow deformed crimped filament of the present invention is required to be 1.5 or less. It is preferably 1.3 or less, more preferably 1.1, and most preferably 1.0, which is a perfect circle without hollow collapse. Here, the hollow collapse ratio is defined by the following formula.
Hollow collapse ratio = a / b
a: long side of core part b: short side of core part Further, a schematic view of hollow collapse is shown in FIG. When the hollow crush ratio exceeds 1.5, the amount of air is reduced, the heat retention is lowered, and the bulkiness due to the crimping performance cannot be exhibited.
(フィン部)
本発明の中空異形捲縮長繊維は、コア部外表面から、コア部中心点に対して放射状に突出したフィン部を有し、コア部の長さ方向に沿って延在する、フィン部は4枚以上が必要であり、好ましくは6枚以上、さらに好ましくは8枚以上である。
(Fin part)
The hollow deformed crimped filament of the present invention has a fin portion radially protruding from the outer surface of the core portion with respect to the center point of the core portion, and extends along the length direction of the core portion. It is necessary to have 4 or more sheets, preferably 6 or more sheets, and more preferably 8 or more sheets.
フィン部がコア部の外表面から、コア部中心点に対して放射状に突出し、かつコア部の長さ方向に沿って延在することにより、捲縮加工によって均等に捲縮が発現するほか、マルチフィラメントでの単糸間の干渉により体積排除効果を得ることができ、高い空隙形成率を得ることができる。   From the outer surface of the core portion, the fin portion radially protrudes with respect to the center point of the core portion, and by extending along the length direction of the core portion, in addition to the uniform crimping by crimping, The volume exclusion effect can be obtained by the interference between the single yarns in the multifilament, and a high void formation rate can be obtained.
フィン部の枚数を少なくとも4枚とすることにより、単糸間の摩擦係数を低下させることができ、延伸時の毛羽や断糸の発生を低減することができる。フィン部の枚数に特に上限はないが、例えば12枚が生産面で有効である。   By setting the number of fins to at least 4, the friction coefficient between the single yarns can be reduced, and the occurrence of fluff and broken yarns during drawing can be reduced. There is no particular upper limit to the number of fin portions, but 12 sheets are effective in terms of production.
本発明の中空異形捲縮長繊維の形状の例を図1、図2に示す。図1、図2で明らかなように、本発明の中空異形捲縮長繊維において、フィン部はコア部中心点に対して放射状となる形状で、コア部外表面から外側に向けて突出している形状をとる。   Examples of the shape of the hollow deformed crimped filament of the present invention are shown in FIGS. 1 and 2. As is apparent from FIGS. 1 and 2, in the hollow deformed crimped filament of the present invention, the fin portion has a shape that is radial with respect to the center point of the core portion and protrudes outward from the outer surface of the core portion. Take a shape.
さらに強度が低い場合、完全な中空潰れやフィン折れなどが生じ、中空部とフィン部の形成が不安定となり、嵩高感や軽量感が失われて実用に適したものとならない。   Further, when the strength is low, complete hollow crushing and fin breaking occur, the formation of the hollow portion and the fin portion becomes unstable, and the bulkiness and the lightweight feeling are lost, which is not suitable for practical use.
(断面形状)
本発明の中空異形捲縮長繊維は、単糸の繊維軸に直交する断面において、フィン部の外接円直径が、フィン部の内接円直径の2.0倍を超えることが好ましい。フィン部の外接円直径がフィン部の内接円直径の2.0倍以下であると十分な捲縮を発現することが難しい。
(Cross-sectional shape)
In the hollow deformed crimped filament of the present invention, the circumscribed circle diameter of the fin portion preferably exceeds 2.0 times the inscribed circle diameter of the fin portion in a cross section orthogonal to the fiber axis of the single yarn. When the circumscribed circle diameter of the fin portion is 2.0 times or less the inscribed circle diameter of the fin portion, it is difficult to develop sufficient crimp.
(中空)
本発明の中空異形捲縮長繊維のマルチフィラメントを構成する単糸のコア部の中空率は、好ましくは20〜60%、より好ましくは25〜55%、さらに好ましくは30〜50%である。この範囲の中空率とすることで、軽量感および嵩高感を得つつ、安定した製糸ができる。
(Hollow)
The hollow ratio of the core portion of the single yarn constituting the multifilament of the hollow deformed crimped filament of the present invention is preferably 20 to 60%, more preferably 25 to 55%, and further preferably 30 to 50%. By setting the hollowness in this range, stable yarn production can be performed while obtaining a light weight feeling and a bulky feeling.
ここで、コア部の中空率は、下記式で定義される。
中空率(%)=SA/SB×100
SA:単糸繊維軸に直交する断面におけるコア部の中空部の面積
SB:単糸繊維軸の直交する断面におけるコア部の外接円の面積
嵩高糸の中空率を上記の範囲にするには、図3に例示するような紡糸口金の吐出部スリットの短軸側をできるだけ細くし、スリットで囲われる面積をできるだけ大きくし、かつ、紡糸口金から吐出されたポリマーを口金面の下からなるべく短い距離で速やかに冷却するとよい。
Here, the hollow ratio of the core part is defined by the following formula.
Hollow rate (%) = SA / SB × 100
SA: Area of hollow part of core part in cross section orthogonal to single fiber axis SB: Area of circumscribing circle of core part in cross section of single fiber fiber axis To make hollow ratio of bulky yarn in the above range, As shown in FIG. 3, the minor axis side of the spinneret discharge section slit is made as thin as possible, the area surrounded by the slit is made as large as possible, and the polymer discharged from the spinneret is located as short as possible from below the spinneret surface. It is recommended to cool down immediately.
(空隙)
本発明の中空異形捲縮長繊維は、マルチフィラメントを構成する単糸の空隙率は40〜70%であることが好ましい。ここで、単糸の空隙率は下記式で定義される。
空隙率(%)=((SC−SD)/SC)×100
SC:単糸繊維軸に直交する断面における放射状に突き出したフィン部の外接円の面積
SD:単糸繊維軸に直交する断面における中実部の面積
空隙率を上記の範囲にするには、コア部から放射状に突出し、単糸の繊維軸方向に沿って延在するフィン部を少なくとも4枚は有するようにし、フィン部の外接円の直径をフィン部の内接円の直径の2.0倍を超えるようにフィン部を設けるとよい。
(Void)
In the hollow deformed crimped filament of the present invention, the porosity of the single yarn constituting the multifilament is preferably 40 to 70%. Here, the porosity of the single yarn is defined by the following formula.
Porosity (%) = ((SC-SD) / SC) × 100
SC: Area of the circumscribing circle of the fin portion radially protruding in the cross section orthogonal to the single fiber axis SD: Area of the solid part in the cross section orthogonal to the single fiber axis The core is made to have the porosity within the above range. Have at least four fins that radiate from the part and extend along the fiber axis direction of the single yarn, and the diameter of the circumscribed circle of the fin is 2.0 times the diameter of the inscribed circle of the fin. It is advisable to provide the fin portion so that
(繊維形成性熱可塑性ポリマー)
本発明において、ポリマーの種類としては特に限定されないが、なかでも、ポリエチレンテレフタレートやポリトリメチレンテレフタレート、ポリブチレンテレフタレート、ポリ乳酸、ステレオコンプレックスポリ乳酸などのポリエステルや、第3成分を共重合させた共重合ポリエステルなどが好ましい。中でも、ポリトリメチレンテレフタレート(以下、PTTと略す)がソフト性や異方冷却で得られた立体捲縮性能の点で特に好ましい。
(Fiber forming thermoplastic polymer)
In the present invention, the type of polymer is not particularly limited, but among them, polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid and stereocomplex polylactic acid, and a copolymer obtained by copolymerizing a third component Polymerized polyester and the like are preferable. Among them, polytrimethylene terephthalate (hereinafter abbreviated as PTT) is particularly preferable in terms of softness and three-dimensional crimping performance obtained by anisotropic cooling.
PTTとしては、PTTホモポリマー、または、90モル%以上がPTTであり10モル%以下がその他のエステル繰り返し単位を含む共重合PTTや、10質量%以下がPTT以外のポリマーを混練されたポリマーであることが好ましい。   As the PTT, a PTT homopolymer, or a copolymerized PTT containing 90 mol% or more of PTT and 10 mol% or less of other ester repeating units, or a polymer obtained by kneading a polymer other than PTT with 10% by mass or less is used. Preferably.
共重合成分の代表例としては、イソフタル酸や5−ナトリウムスルホイソフタル酸に代表される芳香族ジカルボン酸、アジピン酸やイタコン酸に代表される脂肪族ジカルボン酸、ヒドロキシ安息香酸等のヒドロキシカルボン酸などが例示される。また、グリコール成分としては、エチレングリコール、ブチレングリコール、ポリエチレングリコール等が例示される。これらの複数が共重合されていても良い。   Typical examples of the copolymerization component include aromatic dicarboxylic acids such as isophthalic acid and 5-sodium sulfoisophthalic acid, aliphatic dicarboxylic acids such as adipic acid and itaconic acid, and hydroxycarboxylic acids such as hydroxybenzoic acid. Is exemplified. Further, examples of the glycol component include ethylene glycol, butylene glycol, polyethylene glycol and the like. A plurality of these may be copolymerized.
(単糸数)
本発明の中空異形捲縮長繊維は、その単糸数が5本以上であることが好ましい。単糸数が4本以下であると、突起部による体積排除効果が十分でなく、目的とする嵩高さ、軽量感を得ることが出来ない。また、単糸数が多くなりすぎると、繊維束としての繊度が大きくなり、繊維の曲げ剛性が高くなりすぎて、布帛におけるソフト感が低下し好ましくない。好ましくは、10〜50本である。
(Number of single threads)
The hollow deformed crimped filament of the present invention preferably has five or more single filaments. If the number of single yarns is 4 or less, the volume excluding effect by the protrusions is insufficient, and the desired bulkiness and lightness cannot be obtained. On the other hand, if the number of single yarns is too large, the fineness of the fiber bundle becomes large, the bending rigidity of the fibers becomes too high, and the soft feeling of the fabric is deteriorated, which is not preferable. The number is preferably 10 to 50.
(全捲縮率)
本発明の中空異形捲縮長繊維は、100℃、20分の沸水処理後の全捲縮率(TC)が、好ましくは5〜40%、より好ましくは10〜35%、さらに好ましくは15〜30%である。全捲縮率が5%未満あると十分な嵩高感が得られず、40%を超えると取り扱い性が低下する。
(Total crimp rate)
The hollow profile crimped filament of the present invention has a total crimp rate (TC) after boiling water treatment at 100 ° C. for 20 minutes, preferably 5 to 40%, more preferably 10 to 35%, and further preferably 15 to. 30%. If the total crimp ratio is less than 5%, a sufficient bulkiness cannot be obtained, and if it exceeds 40%, the handleability is deteriorated.
全捲縮率(TC)を上記の範囲にするためには、繊維形成性熱可塑性ポリマーとしてポリエステルを用いて、紡糸工程において、異方冷却を行うことが必要である。異方冷却とは、具体的には、口金孔から吐出されたポリマー流を、口金面からできるだけ短い距離で、かつ、できるだけ大きい風速の冷却風を、口金面と平行かつ吐出ポリマー流を貫通するように一方向の冷却を行うことをいう。この冷却方法で紡糸して得られた未延伸糸は、断面方向の複屈折率分布が偏芯しており、未延伸糸を延伸した際にスパイラル状の三次元捲縮を発現する。なお、熱処理方法や延伸糸条の拘束状態によっては、サインカーブ状形態の捲縮を得ることができる。さらには、本発明のような中空と複数のフィン部を有する異型断面繊維は、フィン部による表面積の増大効果とコア部の中空部による断熱効果のために断面異方性を付与しやすく、異方冷却によって、より高度な断面異方性を付与することができる。   In order to make the total crimp ratio (TC) within the above range, it is necessary to use polyester as the fiber-forming thermoplastic polymer and perform anisotropic cooling in the spinning step. The anisotropic cooling is, specifically, the polymer flow discharged from the die hole, the cooling air having a wind speed as high as possible and the shortest distance from the die surface penetrates the polymer stream in parallel with the die surface. As described above, the cooling is performed in one direction. The undrawn yarn obtained by spinning with this cooling method has an eccentric birefringence distribution in the cross-sectional direction, and develops a spiral three-dimensional crimp when the undrawn yarn is drawn. Depending on the heat treatment method and the restrained state of the drawn yarn, a crimp having a sine curve shape can be obtained. Further, the atypical cross-section fiber having hollow and a plurality of fin portions as in the present invention easily gives cross-section anisotropy due to the effect of increasing the surface area by the fin portion and the heat insulating effect by the hollow portion of the core portion. A higher degree of cross-section anisotropy can be imparted by directional cooling.
(製造方法の一例)
本発明の中空異型捲縮長繊維は、次の方法で製造することができる。ポリエステル(特にポリトリメチレンテレフタレートが好ましい)のペレットを用いて適正な水分率(0.005〜0.010%)となるように乾燥後、溶融押出機などで溶融して紡糸口金へ導入する。
(Example of manufacturing method)
The hollow deformed crimped filament of the present invention can be produced by the following method. It is dried using pellets of polyester (preferably polytrimethylene terephthalate) so as to have an appropriate moisture content (0.005 to 0.010%), then melted by a melt extruder or the like and introduced into a spinneret.
繊維軸方向に対して直交する繊維横断面において、少なくとも1個の中空部を備えるコア部と、コア部外表面からコア部中心に対して放射状に突出したフィン部を少なくとも4枚以上有した繊維断面を得るために、図3に例示するような紡糸口金を使用し、260〜280℃の温度で口金の紡糸孔から吐出させ、口金面から10〜60mm下で、10〜40℃の範囲の冷却風を風速0.5〜5.0m/秒で、口金面と平行かつ吐出ポリマー流を貫通するように一方向の冷却(異方冷却)を行ない、1500〜3500m/分、好ましくは2000〜3000m/分で巻き取る。この冷却方法、すなわち異方冷却で得られた未延伸糸を延伸工程に供給するまでの未延伸糸の保存環境は、雰囲気温度を10〜30℃、相対湿度50〜95%に保っておくことが好ましい。また、延伸機上の未延伸糸は、延伸中を通してこの温度、湿度に保持することが好ましい。   A fiber having at least four core portions each having at least one hollow portion and at least four fin portions radially protruding from the outer surface of the core portion to the center of the core portion in a fiber cross section orthogonal to the fiber axis direction. In order to obtain a cross-section, a spinneret as illustrated in FIG. 3 is used, and it is discharged from the spinneret hole of the spinneret at a temperature of 260 to 280 ° C., 10 to 60 mm below the spinneret surface, and in the range of 10 to 40 ° C. Cooling air is unidirectionally cooled (anisotropic cooling) at a wind velocity of 0.5 to 5.0 m / sec so as to be parallel to the die surface and penetrate the discharged polymer flow, and 1500 to 3500 m / min, preferably 2000 to Wind up at 3000 m / min. This cooling method, that is, the storage environment of the undrawn yarn until the undrawn yarn obtained by anisotropic cooling is supplied to the drawing step, the ambient temperature should be kept at 10 to 30 ° C. and the relative humidity of 50 to 95%. Is preferred. The undrawn yarn on the drawing machine is preferably kept at this temperature and humidity throughout the drawing.
延伸機上では、未延伸糸は、まず45〜90℃に設定された供給ローラーで加熱される。供給ローラーの温度はより好ましくは60〜80℃、更に好ましくは67〜73℃である。次いで、供給ローラーと延伸ローラーとの周速度比を利用して所定の繊度まで延伸される。延伸倍率は1.3〜2.0倍で好ましくは1.5〜1.8倍である。また糸は延伸中に、140〜180℃に設定されたホットプレートに非接触しながら走行し、緊張熱処理を受ける。延伸ローラーを出た糸は、スピンドルのトラベラーによって撚りをかけられながら、延伸糸パーンとして巻取られる。   On the drawing machine, the undrawn yarn is first heated by the supply roller set at 45 to 90 ° C. The temperature of the supply roller is more preferably 60 to 80 ° C, further preferably 67 to 73 ° C. Then, it is drawn to a predetermined fineness by utilizing the peripheral speed ratio of the supply roller and the drawing roller. The draw ratio is 1.3 to 2.0 times, preferably 1.5 to 1.8 times. During the drawing, the yarn runs while not contacting a hot plate set at 140 to 180 ° C and undergoes a tension heat treatment. The yarn exiting the drawing roller is wound as a drawn yarn parn while being twisted by the traveler of the spindle.
異方冷却の冷却風は、口金面から10〜60mmの位置から付与することが必要で、20〜50mmが更に好ましい。口金面からの冷却開始位置が10mm未満では口金面を冷却してしまい、ポリマー流が不均一となり、一方、60mmより大きいと、異方冷却が不十分で立体捲縮性が小さいものになってしまう。また、冷却風の風速は0.5〜5.0m/秒であり、好ましくは風速1.0〜3.0m/秒である。風速1.0m/秒未満では得られる立体捲縮性は小さく、一方、風速5.0m/秒を超えると、ポリマー流が固化する前に冷却風に吹き飛ばされ、紡糸断糸が多発する。冷却風の温度は低い方が立体捲縮が大きくなる傾向にあり、10〜40℃とすることが必要である。好ましい範囲は15〜30℃、更に好ましくは17〜25℃である。   The cooling air for anisotropic cooling needs to be applied from a position of 10 to 60 mm from the surface of the die, and more preferably 20 to 50 mm. When the cooling start position from the die surface is less than 10 mm, the die surface is cooled and the polymer flow becomes non-uniform. On the other hand, when it is more than 60 mm, the anisotropic cooling is insufficient and the three-dimensional crimping property becomes small. I will end up. Further, the wind speed of the cooling air is 0.5 to 5.0 m / sec, preferably 1.0 to 3.0 m / sec. When the wind speed is less than 1.0 m / sec, the obtained three-dimensional crimping property is small. On the other hand, when the wind speed exceeds 5.0 m / sec, the polymer stream is blown off by the cooling air before solidification, resulting in frequent spinning breakage. When the temperature of the cooling air is lower, the three-dimensional crimp tends to be larger, and it is necessary to set the temperature to 10 to 40 ° C. A preferred range is 15 to 30 ° C, more preferably 17 to 25 ° C.
中空異形捲縮長繊維を採取する為の未延伸糸の紡糸速度は、1500〜3500m/分が必要とされ、好ましくは2000〜3000m/分である。紡糸速度が低ければ、スパイラル状三次元捲縮および/またはサインカーブ状捲縮が発現しない。また紡糸速度が高ければ、断糸が多発し、紡糸工程が不調となる。   The spinning speed of the undrawn yarn for collecting the hollow deformed crimped filament is required to be 1500 to 3500 m / min, preferably 2000 to 3000 m / min. If the spinning speed is low, spiral three-dimensional crimps and / or sine curve crimps do not appear. Further, if the spinning speed is high, many yarn breaks occur and the spinning process becomes unsuccessful.
また、延伸倍率は、1.3〜2.0倍であり、好ましくは1.5〜1.8倍である。1.3倍より低ければ、強度低目となり、完全な中空潰れやフィン折れなどが生じ、中空部とフィン部の形成が不安定となり、嵩高感や軽量感が失われて実用に適したものとならない。2.0倍より高ければ、延伸調子は著しく不調となり、かつ強度は高く風合いは適したものとならない。   The draw ratio is 1.3 to 2.0 times, preferably 1.5 to 1.8 times. If it is less than 1.3 times, the strength will be low, complete hollow collapse and fin breakage will occur, the formation of the hollow part and the fin part will be unstable, and the bulkiness and lightness will be lost and it is suitable for practical use Not If it is higher than 2.0 times, the stretching tone becomes remarkably poor, and the strength is high and the texture is not suitable.
本発明の中空異形捲縮長繊維は、通常の仮撚法を用いて長繊維を機械的に撚り、熱セットして嵩高糸を得る仮撚加工糸に比べ、中空部を機械的に変形させないため、中空部の潰れが小さく、仮撚加工糸より更に嵩高い嵩高糸となるので、著しく嵩高で保温性や軽量感に富む織編物などの布帛を得ることができる。   The hollow deformed crimped filament of the present invention does not mechanically deform the hollow portion as compared with the false twisted yarn in which the long filament is mechanically twisted by using an ordinary false twisting method and heat set to obtain a bulky yarn. Therefore, the hollow portion has a small crush and is a bulky yarn that is more bulky than the false twist textured yarn, so that a fabric such as a woven or knitted fabric that is extremely bulky and has a high heat retaining property and a light weight feeling can be obtained.
次に、本発明を実施例によって本発明を更に具体的に説明する。なお、実施例中の評価、測定は次のとおり実施した。   Next, the present invention will be described more specifically by way of examples. The evaluations and measurements in the examples were carried out as follows.
(1)全捲縮率(TC)
試料繊維に44.15×10−3cN/dtex(50mg/de)の張力をかけて約3333dtex(3000de)となる迄巻き、カセを作成する。カセ作成後、176.6×10−3cN/dtex(200mg/de)相当の荷重を付与し、1分経過後の長さL0(cm)を測定する。L0測定後、176.6×10−3cN/dtex(200mg/de)相当荷重を除去し、1.77×10cN/dtex(2mg/de)相当の荷重を付与した状態で100℃沸水中で20分間処理する。沸水処理後、直ちに全荷重を除去し、24時間フリー状態で40℃以下で自然乾燥する。自然乾燥後のカセに再び1.77×10−3cN/dtex(200mg/de)相当の荷重を付与し1分間経過後の長さL1(cm)を測定する。L1測定後直ちに176.6×10−3cN/dtex(200mg/de)相当荷重を除去し、1分経過後の長さL2(cm)を測定し、下記算出式により全捲縮率(TC)を算出した。
全捲縮率(%)=(L1−L2)/L0×100
(1) Total crimp ratio (TC)
A sample fiber is wound by applying a tension of 44.15 × 10 −3 cN / dtex (50 mg / de) to the sample fiber until it becomes about 3333 dtex (3000 de). After forming the cassette, a load equivalent to 176.6 × 10 −3 cN / dtex (200 mg / de) is applied, and the length L0 (cm) after 1 minute has elapsed is measured. After L0 measurement, a load equivalent to 176.6 × 10 −3 cN / dtex (200 mg / de) was removed, and a load equivalent to 1.77 × 10 cN / dtex (2 mg / de) was applied in boiling water at 100 ° C. Treat for 20 minutes. Immediately after the boiling water treatment, the entire load is removed, and air is naturally dried at 40 ° C. or lower for 24 hours in a free state. A load equivalent to 1.77 × 10 −3 cN / dtex (200 mg / de) is applied again to the naturally dried cassette, and the length L1 (cm) after 1 minute has elapsed is measured. Immediately after the measurement of L1, the load equivalent to 176.6 × 10 −3 cN / dtex (200 mg / de) was removed, the length L2 (cm) after 1 minute was measured, and the total crimp ratio (TC ) Was calculated.
Total crimp ratio (%) = (L1-L2) / L0 × 100
(2)フィン部の外接円および内接円
紡糸捲取したマルチフィラメントのセクションを切り、単糸1本の繊維軸に直交する断面の写真(1500倍)を、SEM(走査電子顕微鏡)により撮影した。
断面写真において、フィン部の外接円と内接円を描き、それらの直径を測定してフィン部の外接円直径および内接円直径とした。
図1にフィン部の外接円および内接円の模式図を示す。図1のBがフィン部の内接円、Cがフィン部の外接円を表す。
外接円直径が内接円直径の2.0倍以上の条件を満足するもの「優」で、満足しないものを「不良」で評価した。
(2) Circumscribed circle and inscribed circle of the fin portion A section of the multifilament wound by spinning is cut, and a photograph (1500 times) of a cross section orthogonal to the fiber axis of one single yarn is taken by SEM (scanning electron microscope). did.
In the cross-sectional photograph, the circumscribed circle and the inscribed circle of the fin portion were drawn, and their diameters were measured to obtain the circumscribed circle diameter and the inscribed circle diameter of the fin portion.
FIG. 1 shows a schematic diagram of the circumscribed circle and the inscribed circle of the fin portion. In FIG. 1, B represents the inscribed circle of the fin portion, and C represents the circumscribed circle of the fin portion.
The condition that the circumscribed circle diameter was 2.0 times or more the inscribed circle diameter was evaluated as "excellent", and the condition that was not satisfied was evaluated as "poor".
(3)コア部の中空率(%)
上記(2)で得た断面の写真において、単糸1本の繊維軸の直交する断面におけるコア部の内接円の面積と、コア部の中空部の面積を算出し、以下の式により単糸の中空率を求めた。
中空率(%)=SA/SB×100(%)
SA:単糸繊維軸の直交する断面におけるコア部の中空部の面積
SB:単糸繊維軸の直交する断面におけるコア部の外接円の面積
この測定を単糸5本分行い、5本の中空率を平均して中空率(%)とした。
(3) Hollow rate of core (%)
In the photograph of the cross section obtained in (2) above, the area of the inscribed circle of the core portion and the area of the hollow portion of the core portion in the cross section orthogonal to the fiber axis of one single yarn were calculated, and The hollowness of the yarn was determined.
Hollow rate (%) = SA / SB x 100 (%)
SA: Area of hollow portion of core portion in cross section orthogonal to single yarn fiber axis SB: Area of circumscribed circle of core portion in cross section orthogonal to single yarn fiber axis This measurement was performed for 5 single yarns and 5 hollows The rates were averaged to obtain the hollow rate (%).
(4)空隙率
上記(2)で得た断面の写真のフィン部の外接円の面積を算出して面積SCとした。
また、繊維軸に直交する断面の中実部の面積SD(図2のDで示す部分の面積)を、繊度およびポリマーの密度(ポリエステルの場合は1.38g/cm)から、以下の式により空隙率を算出した。
空隙率(%)=((SC−SD)/SC)×100(%)
SC:繊維軸に直交する断面における放射状に突き出したフィン部の外接円の面積
SD:繊維軸に直交する断面における中実部の面積
ここで、中実部の面積は、コア部およびフィン部のそれぞれの中実部の面積を含む。
この測定を単糸5本分行い、5本の空隙率を平均して空隙率(%)とした。
(4) Porosity The area of the circumscribed circle of the fin portion in the photograph of the cross section obtained in (2) above was calculated and defined as the area SC.
In addition, the area SD (area of the portion indicated by D in FIG. 2) of the solid portion of the cross section orthogonal to the fiber axis is calculated from the following formula from the fineness and the density of the polymer (1.38 g / cm 3 in the case of polyester). The porosity was calculated by.
Porosity (%) = ((SC-SD) / SC) × 100 (%)
SC: Area of circumscribing circle of radially protruding fin portion in cross section orthogonal to fiber axis SD: Area of solid portion in cross section orthogonal to fiber axis Here, the area of the solid portion is the area of the core portion and the fin portion. Includes the area of each solid part.
This measurement was performed for 5 single yarns, and the void ratios of the 5 yarns were averaged to obtain the void ratio (%).
(5)捲縮数
JIS L 1015 7.12に記載の方法により、25mmあたりの捲縮数を計測した。
(5) Number of crimps The number of crimps per 25 mm was measured by the method described in JIS L 1015 7.12.
(6)捲縮形状
スパイラル三次元捲縮の場合は、繊維長さ25mm当たりの「らせん」の個数(らせん1個につき捲縮2個とする)、サインカーブ状捲縮の場合は繊維長さ25mm当たりの山の個数を数え、30個以上を優、30個未満を不良と判定した。
尚、捲縮形状としては、スパイラル状三次元捲縮をSp、サインカーブ状捲縮をSiと略称することがある。
(6) Crimp shape In the case of a spiral three-dimensional crimp, the number of "helices" per 25 mm of fiber length (one spiral has two crimps), and in the case of a sinusoidal crimp, the fiber length The number of peaks per 25 mm was counted, 30 or more were judged excellent, and less than 30 was judged defective.
As the crimp shape, the spiral three-dimensional crimp may be abbreviated as Sp and the sine curve crimp may be abbreviated as Si.
(7)破断強度
JIS−L−1013に基づいて測定した。
(7) Breaking strength It was measured based on JIS-L-1013.
(8)風合い(嵩高感と軽量感)
得られた繊維を用いて筒編を作成し、編地の触感について、嵩高感および軽量感のそれぞれを4段階(◎(優)、○(良)、△(やや不足)、×(不良))で官能評価した。
(8) Texture (bulky and lightweight)
A tubular knit is formed using the obtained fiber, and the feel of the knitted fabric has four levels of bulkiness and lightness (◎ (excellent), ○ (good), Δ (somewhat insufficient), × (poor) ) Was used for sensory evaluation.
(9)布帛の嵩高さ
まず、JIS L 1018 8.5にしたがい布帛の厚さT(mm)を測定した。つぎに、JIS L 1018 8.4.2にしたがい布帛の目付けW(g/m)を測定した。これら布帛の厚さT(mm)および布帛の目付けW(g/m)から、下記式で布帛の嵩高さを算出した。
嵩高さ(cm/g)=1000×(T/W)
(9) Bulkiness of Fabric First, the thickness T (mm) of the fabric was measured according to JIS L 1018 8.5. Next, the fabric weight W (g / m 2 ) of the fabric was measured according to JIS L 1018 84.2. The bulkiness of the cloth was calculated by the following formula from the thickness T (mm) of these cloths and the basis weight W (g / m 2 ) of the cloths.
Bulkiness (cm 3 / g) = 1000 × (T / W)
(10)布帛の通気度
JIS L 1018 8.33.1にしたがい通気度(cc/cm/秒)を測定した。
(10) Air permeability of fabric
The air permeability (cc / cm 2 / sec) was measured according to JIS L 1018 8.33.1.
(11)布帛の保温性
JIS L 1018 8.34.1にしたがい保温性(%)を測定した。
(11) Heat retention of cloth The heat retention (%) was measured according to JIS L 1018 8.34.1.
(12)中空潰れ比
延伸後の単糸1本の繊維軸に直交する断面の写真(1500倍)を、SEM(走査電子顕微鏡)により撮影した。繊維軸に直交する断面におけるコア部の長辺aとコア部の短辺bを測定し、以下の式により中空潰れ比を算出した。前記a,bは図4に示す。
中空潰れ比=a/b
この測定を単糸5本分行い、5本分の中空潰れ比を平均して中空潰れ比とした。
(12) Hollow Crush Ratio A photograph (1500 times) of a cross section of one single yarn after drawing which is orthogonal to the fiber axis was taken by an SEM (scanning electron microscope). The long side a of the core and the short side b of the core in the cross section orthogonal to the fiber axis were measured, and the hollow collapse ratio was calculated by the following formula. The a and b are shown in FIG.
Hollow collapse ratio = a / b
This measurement was performed for 5 single yarns, and the hollow collapse ratios of the 5 yarns were averaged to obtain the hollow collapse ratio.
(13)単糸数
長繊維を構成する単糸の本数を示す。(実施例、比較例では、紡糸口金の吐出孔の数と等しい。)
(13) Number of single yarns The number of single yarns that make up the long fibers is shown. (In Examples and Comparative Examples, it is equal to the number of ejection holes of the spinneret.)
[実施例1]
固有粘度(35℃、オルソクロロフェノール中)が1.00dl/gのポリトリメチレンテレフタレートを265℃で溶融し、図2に示す吐出孔を12個有する紡糸口金より吐出した。吐出された糸条は、吐出直下40mmにて風速2.00m/秒の冷風(約20℃)にて糸条走行方向に直交して一方向からのみ冷却し、オイリングノズルにて油剤を付与し2,000m/分の速度にて巻き取った。得られた未延伸糸を温度70℃で1.7倍に延伸し、次いで温度180℃のスリットヒータにて定長下で熱セットを施し、90dtex、破断強度2.05cN/dtex、捲縮率(TC)25.7%、捲縮数 39個/25mm,中空潰れ比1.02の中空異形捲縮長繊維を得た。
[Example 1]
Polytrimethylene terephthalate having an intrinsic viscosity (35 ° C. in orthochlorophenol) of 1.00 dl / g was melted at 265 ° C. and discharged from a spinneret having 12 discharge holes shown in FIG. The discharged yarn is cooled with a cold wind (about 20 ° C) with a wind speed of 2.00 m / sec immediately below the discharge 40 mm, and is cooled only from one direction orthogonal to the yarn running direction, and an oiling agent is applied by an oiling nozzle. It was wound at a speed of 2,000 m / min. The obtained undrawn yarn was drawn 1.7 times at a temperature of 70 ° C., and then heat set under a fixed length with a slit heater at a temperature of 180 ° C., 90 dtex, breaking strength 2.05 cN / dtex, crimp ratio. (TC) 25.7%, the number of crimps 39/25 mm, and the hollow deformed continuous filament having a hollow collapse ratio of 1.02 were obtained.
次いで、28G、90インチのトリコット経編機(独カールマイヤー社製KS4SU)を使用し、ハーフ組織のトリコット経編物を編成した。得られた編物を130℃にて高圧染色を行い、編物表面を常法により起毛処理を行ったのち、最終セットとして180℃の乾熱セット行った。   Then, a 28 G, 90 inch tricot warp knitting machine (KS4SU manufactured by Karlmeier, Germany) was used to knit a tricot warp knitted fabric having a half structure. The resulting knitted fabric was subjected to high-pressure dyeing at 130 ° C., the knitted fabric surface was raised by a conventional method, and then the final set was subjected to dry heat setting at 180 ° C.
得られた編物において、厚さ3.5mm、目付け181g/m、嵩高さ19.3cm/g、通気度は380cc/cm/秒、保温性は21.1%と、嵩高性、通気性、保温性に優れたものであった。かかる編物を用いてスポーツウエアを縫製し、着用したところ、非常に軽量で通気性、嵩高性、保温性に優れ、着用快適性に優れていた「良好」。得られた評価結果を表1に示す。 The obtained knitted fabric had a thickness of 3.5 mm, a basis weight of 181 g / m 2 , a bulkiness of 19.3 cm 3 / g, an air permeability of 380 cc / cm 2 / sec, and a heat retention property of 21.1%, which was bulky and breathable. It was excellent in heat resistance and heat retention. When sportswear was sewn using such a knit and worn, it was extremely lightweight, had excellent breathability, bulkiness, and heat retention, and was excellent in wearing comfort. Table 1 shows the obtained evaluation results.
[実施例2]
紡糸速度2500m/minで得た未延伸糸を、延伸倍率1.5倍に延伸で実施した以外は、実施例1と同様に中空異形捲縮長繊維を得た。次いで28G、90インチのトリコット経編機(独カールマイヤー社製KS4SU)を使用し、ハーフ組織のトリコット経編物を編成した。得られた編物を130℃にて高圧染色を行い、編物表面を常法により起毛処理を行ったのち、最終セットとして180℃の乾熱セット行った。得られた編物において、厚さ3.1mm、目付け180g/m、嵩高さ17.2cm/g、通気度は326cc/cm/秒、保温性は19.1%と、軽量性、嵩高性、通気性、保温性に優れたものであった。
[Example 2]
A hollow deformed crimped filament was obtained in the same manner as in Example 1 except that the undrawn yarn obtained at a spinning speed of 2500 m / min was drawn at a draw ratio of 1.5 times. Then, using a 28G, 90-inch tricot warp knitting machine (KS4SU manufactured by Karlmeier, Germany), a tricot warp knitted fabric having a half structure was knitted. The resulting knitted fabric was subjected to high-pressure dyeing at 130 ° C., the knitted fabric surface was raised by a conventional method, and then the final set was subjected to dry heat setting at 180 ° C. The obtained knitted fabric had a thickness of 3.1 mm, a basis weight of 180 g / m 2 , a bulkiness of 17.2 cm 3 / g, an air permeability of 326 cc / cm 2 / sec, and a heat retention property of 19.1%, which was lightweight and bulky. It had excellent properties, breathability and heat retention.
かかる編物を用いてスポーツウエアを縫製し、着用したところ、非常に軽量で通気性、嵩高性、保温性に優れ、着用快適性に優れていた「良好」。得られた評価結果を表1に示す。   When sportswear was sewn using such a knit and worn, it was extremely lightweight, had excellent breathability, bulkiness, and heat retention, and was excellent in wearing comfort. Table 1 shows the obtained evaluation results.
[比較例1]
未延伸糸を1000m/minで捲取した他は実施例1と同様にして繊維を得た。得られた繊維の強度が低く、中空潰れが多く見られた。中空率、空隙率、捲縮率も低かった。
[Comparative Example 1]
A fiber was obtained in the same manner as in Example 1 except that the undrawn yarn was wound at 1000 m / min. The strength of the obtained fiber was low and many hollow collapses were observed. The hollow rate, void rate, and crimp rate were also low.
また、得られた編物において、厚さ0.52mm、目付け180g/m、嵩高さ2.9cm/g、通気度は181cc/cm/秒、保温性は9.1%と、嵩高性、保温性に欠けるものであった。 The obtained knitted fabric had a thickness of 0.52 mm, a basis weight of 180 g / m 2 , a bulkiness of 2.9 cm 3 / g, an air permeability of 181 cc / cm 2 / sec, and a heat retention property of 9.1%. However, it lacked heat retention.
かかる編物を用いてスポーツウェアを縫製し、着用したところ、ボリューム感や保温性がなく着用快適性に欠けていた「不良」。得られた評価結果を表1に示す。   When a sportswear was sewn using such a knit and worn, it was "poor" because it lacked volume and heat retention and lacked comfort in wearing. Table 1 shows the obtained evaluation results.
[比較例2]
紡糸時の冷風吹き出し位置を100mm下方、冷風速度 0.4m/秒とした他は実施例1と同様にして繊維を得た。
[Comparative example 2]
Fibers were obtained in the same manner as in Example 1 except that the cold air blowing position during spinning was 100 mm downward and the cold air velocity was 0.4 m / sec.
また、得られた編物において、厚さ0.67mm、目付け180g/m、嵩高さ3.7cm/g、通気度は232cc/cm/秒、保温性は12.1%と、嵩高性、保温性に欠けるものであった。 The obtained knitted fabric had a thickness of 0.67 mm, a basis weight of 180 g / m 2 , a bulkiness of 3.7 cm 3 / g, an air permeability of 232 cc / cm 2 / sec, and a heat retention of 12.1%. However, it lacked heat retention.
かかる編物を用いてスポーツウェアを縫製し、着用したところ、ボリューム感や保温性がなく着用快適性に欠けていた「不良」。得られた評価結果を表1に示す。   When a sportswear was sewn using such a knit and worn, it was "poor" because it lacked volume and heat retention and lacked comfort in wearing. Table 1 shows the obtained evaluation results.
[比較例3]
突起部を有さない中空口金を用いた以外は、実施例1と同様の方法で繊維を得た。
また、得られた編物において、厚さ0.56mm、目付け180g/m、嵩高さ3.1cm/g、通気度は154cc/cm/秒、保温性は9.8%と、嵩高性、保温性に欠けるものであった。
[Comparative Example 3]
A fiber was obtained in the same manner as in Example 1 except that a hollow spinneret having no protrusion was used.
The obtained knitted fabric had a thickness of 0.56 mm, a basis weight of 180 g / m 2 , a bulkiness of 3.1 cm 3 / g, an air permeability of 154 cc / cm 2 / sec, and a heat retention property of 9.8%. However, it lacked heat retention.
かかる編物を用いてスポーツウエアを縫製し、着用したところ、ボリューム感や保温性がなく着用快適性に欠けていた「不良」。得られた評価結果を表1に示す。   When sportswear was sewn using such a knitted fabric and worn, there was no sense of volume or heat retention, and the wearing comfort was lacking. Table 1 shows the obtained evaluation results.
[比較例4]
延伸倍率を1.1倍で捲取した他は実施例1と同様にして繊維を得た。得られた繊維の物性は強度が低く、中空潰れが多く見られた。
[Comparative Example 4]
A fiber was obtained in the same manner as in Example 1 except that the fiber was wound at a draw ratio of 1.1 times. The physical properties of the obtained fiber were low and many hollow collapses were observed.
また、得られた編物において、厚さ0.62mm、目付け180g/m、嵩高さ3.4cm/g、通気度は181cc/cm/秒、保温性は10.3%と、嵩高性、保温性に欠けるものであった。 The obtained knitted fabric had a thickness of 0.62 mm, a basis weight of 180 g / m 2 , a bulkiness of 3.4 cm 3 / g, an air permeability of 181 cc / cm 2 / sec, and a heat retention of 10.3%. However, it lacked heat retention.
かかる編物を用いてスポーツウエアを縫製し、着用したところ、ボリューム感や保温性がなく着用快適性に欠けていた「不良」。得られた繊維の物性、評価結果を表1に示す。   When sportswear was sewn using such a knitted fabric and worn, there was no sense of volume or heat retention, and the wearing comfort was lacking. Table 1 shows the physical properties of the obtained fibers and the evaluation results.
[比較例5]
単糸数を4本として捲取した他は、実施例1と同様にして得た繊維を比較例5として繊維の物性、評価結果を表1に示す。得られた編物において、厚さ0.66mm、目付け180g/m、嵩高さ3.7cm/g、通気度は192cc/cm/秒、保温性は11.0%と、嵩高性、保温性に欠けるものであった。
[Comparative Example 5]
The fiber obtained in the same manner as in Example 1 except that the number of single yarns was wound up as 4 is Comparative Example 5, and the physical properties of the fiber and the evaluation results are shown in Table 1. The obtained knitted fabric had a thickness of 0.66 mm, a basis weight of 180 g / m 2 , a bulkiness of 3.7 cm 3 / g, an air permeability of 192 cc / cm 2 / sec, and a heat retention property of 11.0%, which was bulkiness and heat retention. It lacked sex.
かかる編物を用いてスポーツウエアを縫製し、着用したところ、ボリューム感や保温性がなく着用快適性に欠けていた「不良」。得られた繊維の物性、評価結果を表1に示す。   When sportswear was sewn using such a knitted fabric and worn, there was no sense of volume or heat retention, and the wearing comfort was lacking. Table 1 shows the physical properties of the obtained fibers and the evaluation results.
[比較例6]
ポリマーをポリエチレンテレフタレート(PET)とした他は、実施例1と同様にして繊維を得た。得られた編物において、厚さ0.48mm、目付け180g/m、嵩高さ2.7cm/g、通気度は120cc/cm/秒、保温性は8.3%と、嵩高性、保温性に欠けるものであった。
[Comparative Example 6]
Fibers were obtained in the same manner as in Example 1 except that the polymer was polyethylene terephthalate (PET). The obtained knitted fabric had a thickness of 0.48 mm, a basis weight of 180 g / m 2 , a bulkiness of 2.7 cm 3 / g, an air permeability of 120 cc / cm 2 / sec, and a heat retention property of 8.3%, which was bulkiness and heat retention. It lacked sex.
かかる編物を用いてスポーツウエアを縫製し、着用したところ、ボリューム感や保温性がなく着用快適性に欠けていた「不良」。得られた繊維の物性、評価結果を表1に示す。
表1に示すとおり、本発明の範囲内で得られたPTT繊維は良好な捲縮性を示し、布帛としても嵩高感、軽量感に優れるものであった。それに対し、十分な捲縮性を示さない比較例1、2、3、4、5、6は布帛としての嵩高感、軽量感が不足していた。突起部を有さない比較例3においても同様に嵩高感、軽量感が不十分なものであり、ポリマーにPETを使用した場合も、十分な捲縮性、軽量感、嵩高感は得られなかった。得られた繊維の物性、評価結果を表1に示す。
When sportswear was sewn using such a knitted fabric and worn, there was no sense of volume or heat retention, and the wearing comfort was lacking. Table 1 shows the physical properties of the obtained fibers and the evaluation results.
As shown in Table 1, the PTT fiber obtained within the range of the present invention showed good crimpability and was excellent in bulkiness and lightness as a fabric. On the other hand, Comparative Examples 1, 2, 3, 4, 5, and 6, which did not show sufficient crimpability, lacked the bulkiness and lightness of the fabric. Similarly, in Comparative Example 3 having no protrusions, the bulkiness and the light weight feeling are similarly insufficient, and even when PET is used as the polymer, sufficient crimpability, the light weight feeling and the bulky feeling cannot be obtained. It was Table 1 shows the physical properties of the obtained fibers and the evaluation results.
*)表1において、捲縮形状としては、スパイラル状三次元捲縮をSp、サインカーブ状捲縮をSiとした。   *) In Table 1, as the crimp shape, Spiral three-dimensional crimps were used, and sine curve crimps were used.
本発明は、立体捲縮性を有する中空異形捲縮長繊維で捲縮性を発現することができ、単糸間の空間も良好に維持することが可能であり、嵩高性、軽量性、保温性に優れているので、トレーニングウェア、ウィンドブレーカーなどのスポーツ衣料、一般衣料、衣料用中綿、布団用詰め綿、シート生地などの用途に有用である。   INDUSTRIAL APPLICABILITY The present invention is capable of expressing crimpability with hollow irregularly shaped crimped filaments having three-dimensional crimpability, can maintain a good space between single yarns, and is bulky, lightweight, and heat-retaining. Since it has excellent properties, it is useful for training wear, sports clothing such as windbreakers, general clothing, batting for clothing, stuffed cotton for futons, and sheet cloth.
A;中空部
B;フィン部の内接円
C;放射状に突き出したフィン部の外接円
D;繊維横断面のポリマー部の面積
E;フィン部の外接円の直径
F;フィン部の内接円の直径
a;コア部の長辺
b;コア部の短辺
A: Hollow part
B: Inscribed circle of fin
C: Radially projected circumscribed circle of the fin portion D; Area of polymer portion of fiber cross section E; Diameter of circumscribed circle of fin portion F; Diameter of inscribed circle of fin portion a; Long side b of core portion; Core Short side of part

Claims (9)

  1. 繊維軸方向に対して直交する繊維横断面において、少なくとも1個の中空部を備えるコア部と、コア部外表面からコア部中心に対して放射状に突出したフィン部を有し、下記(1)〜(3)を満たすことを特徴とする中空異型捲縮長繊維。
    (1)フィン部が4枚以上である。
    (2)捲縮数が30個/25mm以上の立体捲縮である。
    (3)単糸断面の中空部潰れ比が1.5以下である。
    In a fiber cross section orthogonal to the fiber axis direction, a core part having at least one hollow part and a fin part radially protruding from the outer surface of the core part toward the center of the core part are provided, and the following (1) To (3), hollow hollow crimped filaments characterized by satisfying (3).
    (1) There are four or more fins.
    (2) The number of crimps is 30/25 mm or more.
    (3) The hollow portion collapse ratio of the single yarn cross section is 1.5 or less.
  2. 前記繊維を構成する成分が、ポリトリメチレンテレフタレートを主たる成分とする請求項1記載の中空異型捲縮長繊維。   The hollow modified crimped filament according to claim 1, wherein the component constituting the fiber is mainly polytrimethylene terephthalate.
  3. 繊維軸方向に対して直交する繊維横断面において、以下の式を満足する請求項1または2に記載の中空異型捲縮長繊維。
    フィン部の外接円直径 > フィン部の内接円直径 × 2.00
    The hollow modified crimped filament according to claim 1 or 2, which satisfies the following expression in a fiber cross section orthogonal to the fiber axis direction.
    Circumscribed circle diameter of fin> Inscribed circle diameter of fin x 2.00
  4. コア部の中空率が20〜60%である、請求項1〜3のいずれかに記載の中空異型捲縮長繊維。
    中空率(%)=SA/SB×100(%)
    SA:単糸繊維軸の直交する断面におけるコア部の中空部の面積
    SB:単糸繊維軸の直交する断面におけるコア部の外接円の面積
    The hollow atypical crimped filament according to any one of claims 1 to 3, wherein the core portion has a hollowness of 20 to 60%.
    Hollow rate (%) = SA / SB x 100 (%)
    SA: Area of hollow portion of core portion in cross section orthogonal to single fiber axis SB: Area of circumscribed circle of core portion in cross section orthogonal to single fiber axis
  5. 空隙率が40〜70%である、請求項1〜4のいずれか1項に記載の中空異型捲縮長繊維。
    空隙率(%)=((SC−SD)/SC)×100(%)
    SC:繊維軸に直交する断面における放射状に突き出したフィン部の外接円の面積
    SD:繊維軸に直交する断面における中実部の面積
    The hollow atypical crimped filament according to any one of claims 1 to 4, which has a porosity of 40 to 70%.
    Porosity (%) = ((SC-SD) / SC) × 100 (%)
    SC: Area of the circumscribing circle of the fin portion radially protruding in the cross section orthogonal to the fiber axis SD: Area of the solid part in the cross section orthogonal to the fiber axis
  6. 100℃、20分の沸水処理後の全捲縮率(TC)が5〜40%である請求項1〜5のいずれか1項に記載の中空異型捲縮長繊維。   The hollow modified crimped filament according to any one of claims 1 to 5, which has a total crimp rate (TC) of 5 to 40% after boiling water treatment at 100 ° C for 20 minutes.
  7. 破断強度が1.6〜2.6cN/dtexである、請求項1〜6のいずれか1項に記載の中空異型捲縮長繊維。   The hollow modified crimped filament according to any one of claims 1 to 6, which has a breaking strength of 1.6 to 2.6 cN / dtex.
  8. スパイラル状三次元捲縮および/またはサインカーブ状捲縮により立体捲縮性が付与されている、請求項1〜7のいずれか1項に記載の中空異型捲縮長繊維。   The hollow atypical crimped filament according to any one of claims 1 to 7, which has a three-dimensional crimping property provided by a spiral three-dimensional crimp and / or a sine curve crimp.
  9. 請求項1〜8のいずれか1項に記載の中空異形捲縮長繊維の製造方法であって、紡糸速度が1500〜3500m/分であり、口金面の下から10〜60mmの位置で、口金面と平行、かつ吐出ポリマー流を貫通するように一方向から風速0.5〜5.0m/秒の空気を吹き付けて口金から吐出したポリマー流を異方冷却することを特徴とする中空異形捲縮長繊維の製造方法。   The method for producing hollow deformed crimped filaments according to any one of claims 1 to 8, wherein the spinning speed is 1500 to 3500 m / min, and the spinneret is located 10 to 60 mm from the bottom of the spinneret surface. A hollow profile winding characterized in that air having a wind speed of 0.5 to 5.0 m / sec is blown from one direction so as to penetrate the discharged polymer flow in parallel with the surface and anisotropically cool the polymer flow discharged from the die. A method for producing a reduced fiber.
JP2018207303A 2018-11-02 2018-11-02 Modified cross-section crimped hollow filament Pending JP2020070530A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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JP2020070530A true JP2020070530A (en) 2020-05-07

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