JPH10226920A - Melt-extrusion spinning for extremely fine multi-filament yarn - Google Patents
Melt-extrusion spinning for extremely fine multi-filament yarnInfo
- Publication number
- JPH10226920A JPH10226920A JP4457297A JP4457297A JPH10226920A JP H10226920 A JPH10226920 A JP H10226920A JP 4457297 A JP4457297 A JP 4457297A JP 4457297 A JP4457297 A JP 4457297A JP H10226920 A JPH10226920 A JP H10226920A
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- Prior art keywords
- yarn
- spinneret
- spinning
- melt
- yarns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、紡糸引き取り後の
単糸繊度が 1.0デニール（ｄ）以下のポリエステル繊維
を、安定して連続的に製造するポリエステル極細マルチ
フィラメントの溶融紡糸方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for melt-spinning polyester ultra-fine multifilaments, which stably and continuously produces polyester fibers having a single fiber fineness of 1.0 denier (d) or less after spinning-off. .
【０００２】[0002]
【従来の技術】単糸繊度が 1.0ｄ以下のポリエステルマ
ルチフィラメントは、風合が優れているため、天然皮革
調の布帛やピーチスキン調の織物等で幅広い用途に用い
られている。このようなマルチフィラメントの製造に
は、様々な方法が用いられているが、特開昭54− 30924
号公報には、紡糸速度を2500ｍ／分以上とすることによ
って、特殊な紡糸装置を用いずに、単糸繊度 1.0ｄ以下
の極細繊維を製造する方法が提案されている。この方法
によると、口金に穿孔された紡糸孔１孔当たりの吐出量
が増大すること、紡糸張力がかかることによって糸揺れ
が緩和されること、さらには、高い配向度等の効果によ
り、比較的簡単に極細マルチフィラメントを得ることが
できる。2. Description of the Related Art Polyester multifilaments having a single-fiber fineness of 1.0 d or less are used in a wide range of applications in natural leather-like fabrics, peach skin-like fabrics, and the like because of their excellent texture. Various methods have been used for the production of such a multifilament.
Japanese Patent Application Laid-Open Publication No. H11-163873 proposes a method for producing ultrafine fibers having a single-fiber fineness of 1.0 d or less by using a spinning speed of 2500 m / min or more without using a special spinning device. According to this method, the discharge amount per spinning hole perforated in the spinneret is increased, the yarn sway is reduced by applying the spinning tension, and further, the effect such as the high degree of orientation is relatively high. An ultrafine multifilament can be easily obtained.
【０００３】しかしながら、紡糸速度が増すに従い、単
糸繊度が細くなるに従い、また、フィラメント数が多く
なるに従って、溶融紡糸、冷却後の糸条に作用する空気
抵抗が増大し、集束する以前の糸条は糸揺れが生じ、密
着切れ、ドラフト切れ、糸斑が生じるという問題があっ
た。However, as the spinning speed increases, the fineness of a single yarn decreases, and as the number of filaments increases, the air resistance acting on the yarn after melt spinning and cooling increases, and the yarn before being bundled is There was a problem in that the yarn was swayed by the yarn, and the adhesion was broken, the draft was broken, and the yarn was spotted.
【０００４】この問題を解決するものとして、特開平６
−116806号公報には、糸条が高速で走行するほど増大す
る空気抵抗に起因して生じる、糸条の随伴気流を効率的
に遮断するため、糸条案内部を有するオイリング装置の
直上に邪魔板を設置して糸揺れを防ぐ方法が提案されて
いる。しかしながら、この方法によると、糸条の随伴気
流が邪魔板に跳ね返されることで走行糸条と反対の向き
に発生する気流が糸条の揺れを増幅する結果になり、上
記した問題を解決することはできなかった。To solve this problem, Japanese Patent Laid-Open No.
No. 116806 discloses that in order to efficiently shut off the accompanying airflow of the yarn caused by the air resistance that increases as the yarn travels at a higher speed, an obstacle is provided immediately above an oiling device having a yarn guide. There has been proposed a method of installing a board to prevent the yarn from swaying. However, according to this method, the accompanying airflow of the yarn is bounced off the baffle plate, and the airflow generated in the direction opposite to the traveling yarn amplifies the sway of the yarn. Could not.
【０００５】また、近年では、多孔群紡糸法を採用し、
生産性の効率化が図られている。すなわち、通常は、１
個の紡糸口金により吐出されたフィラメント群は、１糸
条として巻き取られるのが一般的であるが、多孔群紡糸
法では、１個の紡糸口金から２以上の糸条を得る方法で
あって、紡糸口金に穿孔した吐出孔を複数の吐出孔群に
分割し、それぞれの吐出孔群ごとに糸条集束用ガイドに
より集束し、それぞれの糸条ごとにパッケージに巻き取
る方法である。In recent years, a porous group spinning method has been adopted,
Productivity is being improved. That is, usually 1
The filament group discharged by each spinneret is generally wound up as one yarn. However, in the porous group spinning method, two or more yarns are obtained from one spinneret. In this method, a discharge hole formed in a spinneret is divided into a plurality of discharge hole groups, each discharge hole group is bundled by a yarn consolidation guide, and each yarn is wound around a package.
【０００６】このような多孔群紡糸法により、極細繊維
を溶融紡糸して製造すれば、極細ポリエステルマルチフ
ィラメントを効率的に得ることが可能となる。しかしな
がら、上記のように１個の紡糸口金の吐出孔を多孔群に
分割して溶融紡糸すると、糸条間の気流が乱れ、糸揺れ
が増幅しやすく、得られる糸条の均斉度が悪化する。さ
らには、糸揺れや糸条内の密着等で切断された単糸が、
気流の乱れにより隣の糸条へ渡ってしまうことが頻発
し、巻き上げられたパッケージのフィラメント数が増減
するため製品とならず、製品の収率が低下するという問
題があった。[0006] If the ultrafine fibers are produced by melt spinning by such a porous group spinning method, it is possible to efficiently obtain ultrafine polyester multifilaments. However, as described above, when the discharge hole of one spinneret is divided into a group of holes and melt-spun, the airflow between the yarns is disturbed, the yarn sway is easily amplified, and the uniformity of the obtained yarn is deteriorated. . Furthermore, the single yarn cut due to yarn swaying or close contact within the yarn,
The turbulence of the air current frequently causes the yarn to cross over to the next yarn, and the number of filaments of the wound package increases or decreases, so that there is a problem that the product does not become a product and the yield of the product decreases.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上述した問
題点を解決し、ポリエステル極細マルチフィラメントを
紡糸速度2500ｍ／分以上の高速で多孔群紡糸する際にお
いても、糸揺れを低減し、糸条間での単糸渡りを抑制
し、均斉度に優れた極細繊維を収率よく、安定して製造
することができる溶融紡糸方法を提供することを技術的
な課題とするものである。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and reduces yarn sway even when performing multi-hole spinning of polyester ultrafine multifilament at a high spinning speed of 2500 m / min or more. It is a technical object of the present invention to provide a melt spinning method capable of stably producing ultrafine fibers having excellent uniformity with a low yield while suppressing single yarn transfer between strips.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上記した
課題を解決するために鋭意検討した結果、本発明に到達
した。すなわち、本発明は、多数の吐出孔が穿孔され、
これらの吐出孔がｎ個の吐出孔群に等分割された紡糸口
金を用いて、紡糸速度2500ｍ／分以上で溶融紡糸し、紡
糸口金下部に設けた環状冷却装置で冷却した後、ｎ本の
糸条に集束して、紡糸引き取り後の単糸繊度が1.0 デニ
ール以下、フィラメント数が50〜200 のポリエステル極
細繊維糸条を得る方法において、紡糸口金面のｎ個の吐
出孔群に等分割された吐出孔の吐出孔群間の最小吐出孔
間距離Ｌ1 と、紡糸後ｎ本の糸条を最初に集束する際の
糸条間距離Ｌ2 とを、下記式を満足するようにすること
を特徴とするポリエステル極細マルチフィラメントの溶
融紡糸方法を要旨とするものである。ただし、ｎは２〜
４とする。 0.8≦Ｌ2 ／Ｌ1 ≦2.0Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, in the present invention, a large number of discharge holes are perforated,
These spinning holes are melt-spun at a spinning speed of 2500 m / min or more using a spinneret equally divided into n discharging hole groups, and cooled by an annular cooling device provided below the spinneret. In a method of obtaining a polyester ultrafine fiber yarn having a single yarn fineness of 1.0 denier or less and a filament number of 50 to 200 after spinning and bundling into a yarn, the yarn is equally divided into n discharge holes on the spinneret surface. the minimum discharge hole distance L 1 between the discharge hole group of discharge hole, and a yarn distance L 2 at the time of focusing the n number of yarns after spinning initially, so as to satisfy the following formula that was The gist of the present invention is a melt spinning method for polyester ultrafine multifilaments. However, n is 2
4 is assumed. 0.8 ≦ L 2 / L 1 ≦ 2.0
【０００９】[0009]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明におけるポリエステルとは、主にエチレン
テレフタレート単位を主たる繰返し単位とするポリエス
テルをいうが、その性質を本質的に変えない範囲で、第
３成分として、例えば、イソフタル酸、５−ナトリウム
スルホイソフタル酸等のジカルボン酸、プロピレングリ
コール、1,４−ブタンジオール、ジエチレングリコー
ル、ポリエチレングリコール等のジオール類を共重合し
たコポリエステルでもよく、また、これらのポリエステ
ルに艶消し剤、安定剤、着色剤、難燃剤、表面改良剤等
を添加したものでもよい。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The polyester in the present invention mainly refers to a polyester having an ethylene terephthalate unit as a main repeating unit, and as a third component, for example, isophthalic acid, 5-sodium sulfoisophthalic acid as long as its properties are not substantially changed. Copolyesters obtained by copolymerizing diols such as dicarboxylic acids such as propylene glycol, 1,4-butanediol, diethylene glycol and polyethylene glycol may be used, and matting agents, stabilizers, coloring agents, and flame retardants may be added to these polyesters. , A surface modifier or the like may be added.
【００１０】また、ポリエステルの重合度は、ポリエス
テルの種類や目的とする糸条の用途により適宜選定すれ
ばよいが、一般的にポリエチレンテレフタレートでは、
極限粘度〔η〕が0.55〜0.75のものを用いることが好ま
しい。また、フィラメントは、単一成分のポリエステル
で構成しても、複数成分のポリエステルを用いて、サイ
ドバイサイド構造や芯鞘構造等のものとしてもよく、断
面形状は、丸断面に限定されず、三角断面等の異形断面
や中空断面でもよい。The degree of polymerization of the polyester may be appropriately selected depending on the type of the polyester and the intended use of the yarn. In general, in the case of polyethylene terephthalate,
It is preferable to use one having an intrinsic viscosity [η] of 0.55 to 0.75. The filament may be composed of a single-component polyester or a multi-component polyester, and may have a side-by-side structure or a core-sheath structure. It may be an irregular cross section or a hollow cross section.
【００１１】次に、本発明を図面を用いて説明する。図
３は、本発明のポリエステル極細繊維の溶融紡糸方法の
一実施態様を示す概略工程図である。紡糸口金１に設け
られたｎ個（ｎ＝２とする）の吐出孔群に分割された吐
出孔より吐出された糸条Ｙは、環状型冷却装置２から吹
き出される冷却風で冷却され、オイリング装置３で油剤
を付与された後、集束ガイド４と交絡装置５を介して２
本の糸条に集束される。そして、集束された２本の糸条
は、引取ローラ６、７を介して、それぞれ巻取装置９
Ａ、９Ｂでパッケージ８Ａ、８Ｂとして巻き取られる。Next, the present invention will be described with reference to the drawings. FIG. 3 is a schematic process diagram showing one embodiment of the melt spinning method of the polyester ultrafine fiber of the present invention. The yarn Y discharged from the discharge holes divided into n (where n = 2) discharge holes provided in the spinneret 1 is cooled by cooling air blown from the annular cooling device 2, After the oil agent is applied by the oiling device 3, the oil agent is applied via the focusing guide 4 and the entanglement device 5.
It is bundled on the thread of the book The bundled two yarns are respectively taken up by winding devices 9 via take-up rollers 6 and 7.
A and 9B are wound as packages 8A and 8B.
【００１２】まず、本発明では、紡糸速度（図３では引
取ローラ６の速度）を2500ｍ／分以上とすることが必要
である。2500ｍ／分未満の紡糸速度では、紡糸引き取り
後の単糸繊度が1.0 デニール以下のポリエステル極細繊
維糸条を得るには、延伸倍率を高くすることが必要とな
り、これによって繊度斑の大きい糸条となったり、操業
性が悪化する。一方、紡糸速度の上限は特に限定するも
のではないが、紡糸速度が高くなるほど糸条に作用する
空気抵抗や紡糸張力が増大し、糸揺れが大きくなりやす
く、紡糸調子も悪化しやすいので、4500ｍ／分程度とす
ることが好ましい。First, in the present invention, the spinning speed (the speed of the take-off roller 6 in FIG. 3) needs to be 2500 m / min or more. At a spinning speed of less than 2500 m / min, it is necessary to increase the draw ratio in order to obtain a polyester ultrafine fiber yarn having a denier of 1.0 denier or less after spinning. Or operability deteriorates. On the other hand, the upper limit of the spinning speed is not particularly limited, but as the spinning speed increases, the air resistance and spinning tension acting on the yarn increase, the yarn sway tends to increase, and the spinning condition easily deteriorates. / Min.
【００１３】図１は、紡糸口金１面に穿孔され、ｎ個の
吐出孔群に等分割された吐出孔10の吐出孔群間の最小吐
出孔間距離Ｌ1 と、ｎ個の糸条を最初に集束する際の糸
条間距離Ｌ2 との位置関係を示す説明図である。図２
は、紡糸口金１面に穿孔された吐出孔10の配列を示す上
面図であり、（Ａ）は吐出孔が２個の吐出孔群に、
（Ｂ）は吐出孔が３個の吐出孔群に、（Ｃ）は吐出孔が
４個の吐出孔群に等分割された紡糸口金を示す。FIG. 1 shows the minimum distance L 1 between the discharge holes of the discharge holes 10 of the discharge holes 10 which are perforated on the surface of the spinneret 1 and are equally divided into the groups of n discharge holes. it is an explanatory view showing the positional relationship between the yarn distance L 2 at the time of initial focusing. FIG.
3A is a top view showing an arrangement of discharge holes 10 formed on one surface of the spinneret, and FIG. 3A shows a discharge hole group having two discharge holes.
(B) shows a spinneret in which the discharge holes are divided into three discharge hole groups, and (C) shows a spinneret in which the discharge holes are equally divided into four discharge hole groups.
【００１４】距離Ｌ1 は、ｎ個の吐出孔群に等分割した
吐出孔群間の吐出孔間距離のうち最小のものであり、極
細マルチフィラメントの多孔群紡糸法においては、糸条
の分割性、冷却効率を考慮し、５mm以上とすることが好
ましい。距離Ｌ2 は、ｎ個の糸条を最初に集束する際の
糸条間距離であり、ｎが３又は４のときは、糸条ごとに
冷却差や張力差が生じないようにするため、それぞれの
集束する際の糸条間距離は等しくするものとする。The distance L 1 is the smallest of the distances between the discharge holes between the discharge hole groups equally divided into n discharge hole groups. In the ultrafine multifilament perforated group spinning method, the division of the yarn is performed. It is preferable that the thickness be 5 mm or more in consideration of performance and cooling efficiency. The distance L 2 is a yarn distance when focusing the n number of yarns in the first, when n is 3 or 4, so that the cooling difference or tension difference for each yarn does not occur, The distance between the yarns at the time of each convergence shall be equal.
【００１５】距離Ｌ1 とＬ2 とは、 0.8≦Ｌ2 ／Ｌ1 ≦
2.0 を満足することが必要である。距離Ｌ1 とＬ2 とを
この範囲内にすれば、糸条を集束する以前に単糸が空気
抵抗を受けることで発生する糸条の随伴気流を単孔群紡
糸法で発生する程度に減少させることができ、下方へ整
流することが可能となり、糸条の揺れを小さく抑えるこ
とができる。これによって、糸条の均斉度が向上し、ま
た、単糸の密着等により切断した単糸が隣の糸条へ渡る
ことを抑えることができ、製品の収率を上げることが可
能となる。The distances L 1 and L 2 are 0.8 ≦ L 2 / L 1 ≦
It is necessary to satisfy 2.0. If the distances L 1 and L 2 are within this range, the airflow generated by the yarn being subjected to air resistance before the yarn is condensed is reduced to such an extent as to be generated by the single-hole group spinning method. The rectification can be performed downward, and the sway of the yarn can be suppressed to be small. As a result, the uniformity of the yarn is improved, and the single yarn cut by close contact of the single yarn or the like can be prevented from passing to the adjacent yarn, and the product yield can be increased.
【００１６】本発明のように１つの紡糸口金に多数の吐
出孔が穿孔され、多孔群に分割された紡糸口金において
は、一般的な口金面径は80〜 150mmと限られており、距
離Ｌ1 の値を大きく変更させることは困難であるため、
Ｌ2 ／Ｌ1 を調整するには、距離Ｌ2 の値を変更させる
ことが好ましい。Ｌ2 ／Ｌ1 を0.8 未満とすると、糸条
の分割作業性、視認性が極端に悪化するとともに、切断
した単糸が隣の孔群への渡り糸となりやすい。Ｌ2 ／Ｌ
1 が2.0を超えると、随伴気流が下方へ良好に整流され
ず、冷却途中の糸条の揺れが大きくなり、糸条の均斉度
が悪化し、斑のある糸条となる。In a spinneret in which a number of discharge holes are formed in one spinneret as in the present invention and divided into a group of holes, the general diameter of the spinneret is limited to 80 to 150 mm, and the distance L Because it is difficult to change the value of 1 greatly,
To adjust the L 2 / L 1, it is preferable to change the value of the distance L 2. When L 2 / L 1 is less than 0.8, the workability of splitting the yarn and the visibility are extremely deteriorated, and the cut single yarn is liable to be a transfer yarn to the next group of holes. L 2 / L
If 1 exceeds 2.0, the accompanying airflow is not rectified well downward, and the sway of the yarn during cooling becomes large, the uniformity of the yarn is deteriorated, and the yarn becomes uneven.
【００１７】本発明においては、吐出孔群数ｎを２〜４
とする必要がある。１個の紡糸口金を用いる多孔群紡糸
法では、吐出孔群数ｎが大きくなるほど、孔群間での吐
出斑が増大したり、糸条ごとの冷却の程度が不均一とな
る。また、本発明の溶融紡糸方法においては、紡糸した
糸条を環状冷却装置で冷却するものであるため、図２
（Ａ）〜（Ｃ）に示すように、多数の吐出孔が同心円状
に配列しているものが好ましい。In the present invention, the number n of ejection hole groups is set to 2 to 4
It is necessary to In the multi-hole spinning method using one spinneret, as the number n of the discharge holes increases, the discharge unevenness between the holes increases, and the degree of cooling for each yarn becomes uneven. Further, in the melt spinning method of the present invention, the spun yarn is cooled by an annular cooling device.
As shown in (A) to (C), it is preferable that a large number of ejection holes are arranged concentrically.
【００１８】そして、１個の紡糸口金を用いて２〜４本
の糸条を得る多孔群紡糸法で単糸繊度 1.0ｄ以下の糸条
を得る本発明においては、１糸条のフィラメント数を50
〜 200とすることが必要である。フィラメント数が50未
満では、紡糸口金当たりの吐出量が少なくなりすぎて不
経済であり、コストの面で不利である。一方、 200を超
えると、均一な冷却が困難となり、また、空気抵抗が大
きくなり、糸揺れを抑えることが困難となる。In the present invention, in which two to four yarns are obtained by using one spinneret and a yarn having a single yarn fineness of 1.0 d or less is obtained by the porous group spinning method, the number of filaments in one yarn is reduced. 50
It needs to be ~ 200. When the number of filaments is less than 50, the discharge amount per spinneret becomes too small, which is uneconomical and disadvantageous in cost. On the other hand, if it exceeds 200, uniform cooling becomes difficult, and the air resistance increases, making it difficult to suppress yarn sway.
【００１９】さらに、紡糸口金１から集束ガイド４まで
の距離は、特に限定されるものではないが、 600〜1200
mm程度とすることが好ましい。 600mm未満であると、糸
条の冷却長が短くなるため、冷却不足から単糸間が密着
しやすく、糸切れが生じやすい。一方、1200mmを超える
と、糸条が集束されるまでの間の距離が長くなりすぎ、
この間で発生する空気抵抗が大きくなり、単糸切れが生
じたり、パッケージに巻き取られた糸条の残留伸度が低
くなりすぎる等の問題が生じやすくなる。Further, the distance from the spinneret 1 to the focusing guide 4 is not particularly limited, but may be 600 to 1200.
It is preferable to set it to about mm. If it is less than 600 mm, the cooling length of the yarn becomes short, so that the single yarns are likely to adhere to each other due to insufficient cooling, and yarn breakage is likely to occur. On the other hand, if it exceeds 1200 mm, the distance until the yarn is collected becomes too long,
The air resistance generated during this time increases, and problems such as breakage of single yarns and excessive reduction of the residual elongation of the yarn wound into the package are likely to occur.
【００２０】[0020]
【実施例】次に、本発明を実施例により具体的に説明す
る。なお、実施例における各評価は次のようにして行っ
た。 （１）単糸渡り １日当たりの孔群間での単糸渡りの発生について、１時
間に１度確認を行い、24錘分の合計発生回数で次のよう
に評価した。 ○ 単糸渡り発生回数０回 △ 単糸渡り発生回数１〜２回 × 単糸渡り発生回数３回以上 （２）ウースター斑Ｕ（％） ZELLWEGER USTER 社製の USTER TESTER UT−１を使用
し、糸速度25ｍ／分、チャート速度５cm／分で測定し、
その値より次のように評価した。 ○ ２％未満 △ ２％以上〜３％未満 × ３％以上Next, the present invention will be described in detail with reference to examples. In addition, each evaluation in an Example was performed as follows. (1) Single yarn transfer The occurrence of single yarn transfer between the hole groups per day was confirmed once an hour, and the total number of occurrences for 24 weights was evaluated as follows. ○ Number of occurrences of single yarn transfer 0 △ Number of single yarn transfer occurrences 1 to 2 × Number of single yarn transfer occurrences 3 or more (2) Worcester spot U (%) Use USELL TESTER UT-1 manufactured by ZELLWEGER USTER. Measured at a yarn speed of 25 m / min and a chart speed of 5 cm / min,
The value was evaluated as follows. ○ Less than 2% △ 2% or more to less than 3% × 3% or more
【００２１】実施例１〜８、比較例１〜８ 極限粘度（フェノールと四塩化エタンの等重量混合物を
溶媒として20℃で測定）〔η〕が0.68で、艶消し剤とし
て酸化チタンを0.40重量％含有したポリエチレンテレフ
タレートを用い、図３に示す工程に従って行った。紡糸
口金１として、表１に示すような吐出孔（直径0.20mm）
数を有し、ｎ個の吐出孔群数に分割されたものを用い、
表１に示す紡糸引き取り後の単糸繊度の糸条となるよう
に、吐出量を種々変更して紡糸した。紡糸された糸条を
環状冷却装置で冷却風を吹き付けて冷却し、ローラ式の
オイリング装置３でオイリングを行った後、集束ガイド
４でｎ本の糸条に集束し、交絡装置５で交絡を付与し
た。次いで、引取ローラ６、７で引き取り、糸条をそれ
ぞれ巻取装置９でｎ個のパッケージ８に巻き取った。こ
のとき、紡糸速度、紡糸口金１面から集束ガイド４まで
距離（集束距離）、紡糸口金１の最小吐出孔間距離
Ｌ1 、糸条を集束ガイド４で集束する際の糸条間距離Ｌ
2 を表１に示すように種々変更して行った。得られた糸
条の単糸繊度、ウースター斑（Ｕ％）、単糸渡りの評価
結果を表１に示す。Examples 1 to 8, Comparative Examples 1 to 8 Intrinsic viscosity (measured at 20 ° C. using an equal weight mixture of phenol and ethane tetrachloride as a solvent) [η] is 0.68, and titanium oxide is 0.40 wt. % Of polyethylene terephthalate, and performed according to the process shown in FIG. As a spinneret 1, a discharge hole as shown in Table 1 (diameter 0.20mm)
Having a number and divided into n number of ejection hole groups,
The spinning rate was changed variously so that the yarn had the fineness of single yarn after spinning as shown in Table 1. The spun yarn is cooled by blowing cooling air with an annular cooling device, oiled by a roller type oiling device 3, converged into n yarns by a converging guide 4, and entangled by an entanglement device 5. Granted. Next, the yarn was taken up by the take-up rollers 6 and 7, and the yarn was wound around n packages 8 by the winding device 9. At this time, the spinning speed, the distance from the surface of the spinneret 1 to the convergence guide 4 (the convergence distance), the minimum distance L 1 between the ejection holes of the spinneret 1, and the distance L between the yarns when the yarn is bunched by the convergence guide 4
2 was changed variously as shown in Table 1. Table 1 shows the evaluation results of the fineness of the obtained yarn, wool mottling (U%), and single-migration.
【００２２】[0022]
【表１】 [Table 1]
【００２３】表１より明らかなように、実施例１〜８に
おいては、単糸渡りの発生もなく、極めて安定して生産
することができ、得られた糸条は繊度斑も小さく、外観
欠点のないパッケージに巻き取ることができた。一方、
比較例１、比較例３〜５、比較例７〜８は、Ｌ2 ／Ｌ1
が2.0 を超えたため、随伴気流が下方へ良好に整流され
ず、冷却途中の糸条の揺れが大きくなり、単糸渡りが生
じ、また、糸条の均斉度が悪化し、斑のある糸条となっ
た。比較例２は、Ｌ2 ／Ｌ1 が0.8 未満であったため、
糸条の分割作業性が悪化し、単糸切れが生じ、単糸渡り
が多発した。比較例６は、フィラメント数が200 を超え
るものであったため、均一な冷却ができず、斑のある糸
条となった。As is clear from Table 1, in Examples 1 to 8, production was extremely stable without the occurrence of single yarn crossing, and the obtained yarns had small fineness unevenness and appearance defects. Was able to be wound up in a package without. on the other hand,
Comparative Example 1, Comparative Example 3-5, Comparative Example 7-8, L 2 / L 1
Exceeds 2.0, the accompanying airflow is not rectified well downward, the yarn swaying during cooling becomes large, single yarn crossover occurs, and the uniformity of the yarn deteriorates, It became. In Comparative Example 2, since L 2 / L 1 was less than 0.8,
The splitting workability of the yarn deteriorated, the single yarn was broken, and the single yarn crossing occurred frequently. In Comparative Example 6, since the number of filaments exceeded 200, uniform cooling could not be performed, and the yarn was uneven.
【００２４】[0024]
【発明の効果】本発明のポリエステル極細マルチフィラ
メントの溶融紡糸方法によれば、紡糸速度2500ｍ／分以
上の高速の多孔群紡糸法において、糸揺れを低減し、吐
出孔群間での単糸渡りを抑制し、均斉度に優れた極細繊
維を収率よく、安定して製造することが可能となる。According to the method of the present invention for spinning a polyester ultra-fine multifilament, in a high-speed multi-hole spinning method with a spinning speed of 2500 m / min or more, yarn sway is reduced and single yarn transfer between discharge hole groups is achieved. , And it is possible to stably produce ultrafine fibers having excellent uniformity with good yield.
【図面の簡単な説明】[Brief description of the drawings]
【図１】紡糸口金面に穿孔された吐出孔の最小吐出孔間
距離Ｌ1 と、糸条を最初に集束する際の糸条間距離Ｌ2
との位置関係を示す説明図である。[1] the minimum discharge hole distance L 1 of the discharge hole formed in the spinneret surface, between yarn when focusing the yarn in the first distance L 2
FIG. 4 is an explanatory diagram showing a positional relationship with the finder.
【図２】紡糸口金面に穿孔された吐出孔の配列を示す上
面図であり、（Ａ）は吐出孔が２個の吐出孔群に、
（Ｂ）は吐出孔が３個の吐出孔群に、（Ｃ）は吐出孔が
４個の吐出孔群に等分割された紡糸口金を示す。FIG. 2 is a top view showing an arrangement of ejection holes perforated on the surface of a spinneret; FIG.
(B) shows a spinneret in which the discharge holes are divided into three discharge hole groups, and (C) shows a spinneret in which the discharge holes are equally divided into four discharge hole groups.
【図３】本発明のポリエステル極細繊維の溶融紡糸方法
の一実施態様を示す概略工程図である。FIG. 3 is a schematic process chart showing one embodiment of the method for melt-spinning polyester ultrafine fibers of the present invention.
１ 紡糸口金 ２ 環状冷却装置 ３ オイリング装置 ４ 集束ガイド ５ 交絡装置 ６、７ 引取ローラ ８ パッケージ ９ 巻取装置 10 吐出孔 Ｙ 糸条 DESCRIPTION OF SYMBOLS 1 Spinneret 2 Annular cooling device 3 Oiling device 4 Focusing guide 5 Entangling device 6, 7 Take-up roller 8 Package 9 Winding device 10 Discharge hole Y Yarn
Claims (1)
孔がｎ個の吐出孔群に等分割された紡糸口金を用いて、
紡糸速度2500ｍ／分以上で溶融紡糸し、紡糸口金下部に
設けた環状冷却装置で冷却した後、ｎ本の糸条に集束し
て、紡糸引き取り後の単糸繊度が1.0 デニール以下、フ
ィラメント数が50〜200 のポリエステル極細繊維糸条を
得る方法において、紡糸口金面のｎ個の吐出孔群に等分
割された吐出孔の吐出孔群間の最小吐出孔間距離Ｌ
1 と、紡糸後ｎ本の糸条を最初に集束する際の糸条間距
離Ｌ2 とを、下記式を満足するようにすることを特徴と
するポリエステル極細マルチフィラメントの溶融紡糸方
法。ただし、ｎは２〜４とする。 0.8≦Ｌ2 ／Ｌ1 ≦2.01. A spinneret in which a large number of discharge holes are drilled, and these discharge holes are equally divided into n discharge hole groups.
Melt spinning at a spinning speed of 2500 m / min or more, cooling by an annular cooling device provided below the spinneret, bundling into n yarns, single yarn fineness after spinning take-off of 1.0 denier or less, and number of filaments In the method for obtaining 50 to 200 polyester ultrafine fiber yarns, the minimum distance L between the discharge holes among the discharge holes equally divided into n discharge holes on the surface of the spinneret.
1, melt-spinning a polyester ultrafine multifilaments, characterized in that the yarn distance L 2 at the time of focusing the n number of yarns after spinning first, so as to satisfy the following equation. However, n is 2-4. 0.8 ≦ L 2 / L 1 ≦ 2.0
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4457297A JPH10226920A (en) | 1997-02-12 | 1997-02-12 | Melt-extrusion spinning for extremely fine multi-filament yarn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4457297A JPH10226920A (en) | 1997-02-12 | 1997-02-12 | Melt-extrusion spinning for extremely fine multi-filament yarn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10226920A true JPH10226920A (en) | 1998-08-25 |
Family
ID=12695228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4457297A Pending JPH10226920A (en) | 1997-02-12 | 1997-02-12 | Melt-extrusion spinning for extremely fine multi-filament yarn |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10226920A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091485A1 (en) * | 2002-04-25 | 2003-11-06 | Teijin Fibers Limited | Method for producing polyester extra fine multi-filament yarn and polyester extra fine false twist textured yarn, polyester extra fine multi-filament yarn, and polyester extra-fine false twist textured yarn |
| CN104988590A (en) * | 2015-07-06 | 2015-10-21 | 桑建军 | Spinning equipment and method for fine denier filament fiber |
-
1997
- 1997-02-12 JP JP4457297A patent/JPH10226920A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091485A1 (en) * | 2002-04-25 | 2003-11-06 | Teijin Fibers Limited | Method for producing polyester extra fine multi-filament yarn and polyester extra fine false twist textured yarn, polyester extra fine multi-filament yarn, and polyester extra-fine false twist textured yarn |
| US7078096B2 (en) | 2002-04-25 | 2006-07-18 | Teijin Fibers Limited | Method for producing polyester extra fine multi-filament yarn and polyester extra fine false twist textured yarn, polyester extra fine multi-filament yarn, and polyester extra-fine false twist textured yarn |
| CN1320179C (en) * | 2002-04-25 | 2007-06-06 | 帝人纤维株式会社 | Method for producing polyester extra fine multi-filament yarn and polyester extra fine false twist textured yarn, polyester extra fine multi-filament yarn, and polyester extra-fine false twist texture |
| KR100984991B1 (en) | 2002-04-25 | 2010-10-04 | 데이진 화이바 가부시키가이샤 | Method for producing polyester extra fine multi-filament yarn and polyester extra fine false twist textured yarn, polyester extra fine multi-filament yarn, and polyester extra-fine false twist textured yarn |
| CN104988590A (en) * | 2015-07-06 | 2015-10-21 | 桑建军 | Spinning equipment and method for fine denier filament fiber |
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