JP2001279528A - Method for producing polyester fiber - Google Patents

Method for producing polyester fiber

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Publication number
JP2001279528A
JP2001279528A JP2000090775A JP2000090775A JP2001279528A JP 2001279528 A JP2001279528 A JP 2001279528A JP 2000090775 A JP2000090775 A JP 2000090775A JP 2000090775 A JP2000090775 A JP 2000090775A JP 2001279528 A JP2001279528 A JP 2001279528A
Authority
JP
Japan
Prior art keywords
yarn
winding
dtex
polyester fiber
polytrimethylene terephthalate
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.)
Granted
Application number
JP2000090775A
Other languages
Japanese (ja)
Other versions
JP3693552B2 (en
Inventor
Seiji Tsuboi
誠治 坪井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
Priority to JP2000090775A priority Critical patent/JP3693552B2/en
Publication of JP2001279528A publication Critical patent/JP2001279528A/en
Application granted granted Critical
Publication of JP3693552B2 publication Critical patent/JP3693552B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method for efficiently producing a polytrimethylene terephthalate having excellent qualities free from unevenness of performances such as dyeability, strength, etc., controlling occurrence of saddle of winding form and burst in a spinning/drawing process. SOLUTION: This method for producing a polyester fiber comprises melting and extruding a polytrimethylene terephthalate-based polyester having 0.4-1.5 intrinsic viscosity from a spinneret, passing the extruded yarn through an air sending zone, cooling and solidifying the yarn, taking off the yarn at 500-4,000 m/minute velocity, then taking up the yarn at 4.5-6.0 degree twill angle of winding under 0.044-0.071 cN/dtex winding tension and a drawing process for hot drawing the obtained undrawn yarn and taking up the yarn under 0.071-0.132 cN/dtex winding tension to give the objective drawn yarn.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ポリトリメチレン
テレフタレートからなる染色斑の小さいポリエステル繊
維の製造方法に関する。さらに詳しくは、紡糸・延伸工
程における巻取り時の、巻取り姿の耳高やバーストの発
生を抑制して、染色性や強度等の性能にも優れたポリト
リメチレンテレフタレート繊維を効率的に生産できる製
造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a polyester fiber made of polytrimethylene terephthalate and having a small amount of stain. More specifically, the production of polytrimethylene terephthalate fiber with excellent performance such as dyeability and strength by suppressing the height and burst of the wound shape during winding in the spinning / drawing process. To possible manufacturing methods.

【0002】[0002]

【従来の技術】ポリトリメチレンテレフタレートは、弾
性率が低くソフトな風合を呈し、且つ弾性回復性や染色
性に優れるといったポリアミドに類似した性質、並びに
耐光性、熱セット性、寸法安定性、低吸水率といったポ
リエチレンテレフタレートに類似した性質を併せ持つこ
とから、これらの特徴を生かしてBCFカーペット、ブ
ラシ等の多くの分野への利用が提案されている(特開平
9−3724号公報、特開平8−173244号公報、
特開平5−262862号公報)。
2. Description of the Related Art Polytrimethylene terephthalate has a low elastic modulus, shows a soft feeling, and has properties similar to polyamide such as excellent elastic recovery and dyeing properties, as well as light resistance, heat setting property, dimensional stability, and the like. It has properties similar to polyethylene terephthalate, such as low water absorption, and it has been proposed to utilize these features in many fields such as BCF carpets and brushes (Japanese Patent Application Laid-Open Nos. 9-3724 and 8). No. 173244,
JP-A-5-262882).

【0003】すなわち、ポリトリメチレンテレフタレー
ト繊維を用いると、耐光性、熱セット性等の性能が低い
というポリアミド繊維の性質が改良されると同時に、低
弾性率(ソフトな風合い)、優れた弾性回復性、易染性
といったポリアミド類似の繊維を提供することが可能と
なり、そのために既存のポリアミド繊維と置き換えられ
る可能性が高い。
[0003] The use of polytrimethylene terephthalate fibers improves the properties of polyamide fibers, such as low light resistance and heat setting properties, while having a low elastic modulus (soft feel) and excellent elastic recovery. It is possible to provide polyamide-like fibers such as properties and ease of dyeing, and therefore, there is a high possibility of being replaced with existing polyamide fibers.

【0004】これまでに提案されているポリトリメチレ
ンテレフタレート繊維の製造方法は、300〜4000
m/分で溶融紡糸した未延伸糸を、一旦巻取った後又は
巻取ることなく連続して、未延伸糸のガラス転移温度以
上の温度で一段又は多段に熱延伸する方法である。例え
ば、特開昭52−5320号公報には、引取られた未延
伸糸を20〜80℃の温度で該温度における最大延伸倍
率の70〜99.9%の倍率で延伸する方法、特開昭5
2−8123号公報には、複屈折率Δnが0.0025
以上の未延伸糸を一旦巻取った後又は一旦巻取る事なく
連続して延伸し次いで140〜180℃の加熱固体に接
触させて熱処理する方法、特開昭58−104216号
公報には、速度2000m/分以上で溶融紡糸した複屈
折率Δnが0.035以上の未延伸糸を温度35〜80
℃の熱ローラを用いて延伸する方法、特開平11−17
2526号公報には、溶融吐出した糸条を保温領域を通
過させた後に固化させて未延伸糸を得、これを一旦巻取
ることなく連続して延伸熱処理を施した後巻取る方法な
どが開示されている。
[0004] The process for producing polytrimethylene terephthalate fiber which has been proposed to date is from 300 to 4000.
This is a method in which an undrawn yarn melt-spun at m / min is hot-drawn at one or more stages at a temperature equal to or higher than the glass transition temperature of the undrawn yarn after winding once or continuously without winding. For example, Japanese Patent Application Laid-Open No. 52-5320 discloses a method of stretching a drawn undrawn yarn at a temperature of 20 to 80 ° C. at a ratio of 70 to 99.9% of a maximum drawing ratio at the temperature. 5
In Japanese Patent Application Laid-Open No. 2-8123, the birefringence Δn is 0.0025.
JP-A-58-104216 discloses a method in which the undrawn yarn is once wound or continuously drawn without being wound, and then heat-treated by contacting with a heated solid at 140 to 180 ° C. An undrawn yarn having a birefringence Δn of 0.035 or more melt-spun at 2,000 m / min or more at a temperature of 35 to 80
Stretching method using a heat roller at a temperature of 0 ° C .;
No. 2526 discloses a method in which a melt-discharged yarn is solidified after passing through a heat retaining region to obtain an undrawn yarn, which is subjected to continuous drawing heat treatment without being once wound, and then wound. Have been.

【0005】しかしながら、本発明者の研究によれば、
特に紡糸と延伸とを別々に行う方法では、得られるポリ
トリメチレンテレフタレート繊維は収縮力が強いため、
例えばチーズ状に巻取る場合にはその巻き姿が耳高の形
状になりやすく、また長時間巻取るとバーストを起こし
やすいという工程安定性に問題があることがわかった。
さらには、例え巻取ることができたとしても、その巻取
り姿の不良に起因するためと推定され、染色すると周期
的な染め斑が発生しやすいという問題もあった。
[0005] However, according to the study of the present inventors,
In particular, in the method in which spinning and drawing are performed separately, the resulting polytrimethylene terephthalate fiber has a strong shrinkage force,
For example, it has been found that there is a problem in the process stability that, when wound in a cheese shape, the wound shape tends to have an ear height, and when wound for a long time, a burst is likely to occur.
Furthermore, even if the film could be wound, it is presumed to be due to the poor shape of the film, and there was a problem that periodic dyeing spots were likely to occur when dyeing.

【0006】[0006]

【発明が解決しようとする課題】本発明は、上記従来技
術を背景になされたもので、その目的は、良好な巻取り
姿が安定して得られ、染色しても染色斑が発生し難く、
しかも強度も良好なポリトリメチレンテレフタレート繊
維の製造方法を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made on the background of the above-mentioned prior art, and an object of the present invention is to obtain a good winding appearance stably, and to suppress the occurrence of stain spots even when dyed. ,
Moreover, it is an object of the present invention to provide a method for producing a polytrimethylene terephthalate fiber having good strength.

【0007】[0007]

【課題を解決するための手段】本発明者らの研究によれ
ば、上記目的は、「実質的にトリメチレンテレフタレー
ト単位から構成された固有粘度が0.4〜1.5のポリ
トリメチレンテレフタレート系ポリエステルを紡糸口金
より溶融押出し、該吐出糸条を送風領域を通過させて冷
却固化させた後にローラーを介して500〜4000m
/分の速度で引取り、次いで巻取り張力0.044〜
0.071cN/dtexの下、巻取り綾角4.5〜
6.0度で巻取って未延伸糸を得る紡糸工程、及び、該
未延伸糸を一段又は多段で熱延伸した後に巻取り張力
0.071〜0.132cN/dtex巻取って延伸糸
を得る延伸工程とからなるポリエステル繊維の製造方
法。」により達成できることが見出された。
According to the study of the present inventors, the above-mentioned object is achieved by a polytrimethylene terephthalate having an intrinsic viscosity of 0.4 to 1.5, which is substantially composed of trimethylene terephthalate units. The polyester is melt-extruded from a spinneret, and the discharged yarn is cooled and solidified by passing through a blowing area, and then 500 to 4000 m via a roller.
/ Min, then winding tension 0.044 ~
Under 0.071 cN / dtex, winding angle 4.5
A spinning step of winding at 6.0 ° to obtain an undrawn yarn, and drawing the undrawn yarn in one or more stages by hot drawing and then winding at a winding tension of 0.071 to 0.132 cN / dtex to obtain a drawn yarn. A method for producing a polyester fiber comprising a drawing step. It has been found that this can be achieved.

【0008】[0008]

【発明の実施の形態】以下、本発明の実施の形態につい
て詳細に説明する。本発明で用いられるポリエステル
は、繰返し単位が実質的にトリメチレンテレフタレート
単位から構成されたポリトリメチレンテレフタレート系
ポリエステルである。ここでいう「実質的に」とは、ポ
リトリメチレンテレフタレートホモポリエステルであっ
ても、本発明の効果を損なわない範囲内、通常は全酸成
分を基準として10モル%以下、好ましくは5モル%以
下の割合で共重合成分を有するコポリエステルであって
もよいことを表す。共重合し得る成分としては、例えば
イソフタル酸、コハク酸、アジピン酸、2,6−ナフタ
レンジカルボン酸、5−ナトリウムスルホイソフタル
酸、5−スルホイソフタル酸テトラブチルホスホニウム
塩等の酸成分や、1,4−ブタンジオール、1,6−ヘ
キサンジオール、シクロヘキサンジメタノール等のグリ
コール成分、ε−カプロラクトン、4−ヒドロキシ安息
香酸等のヒドロキシカルボン酸成分を挙げることができ
る。さらには、ポリオキシエチレングリコール、ポリテ
トラメチレングリコール等の長鎖グリコール成分の場合
には、ポリエステル重量を基準として10重量%以下、
好ましくは5重量%以下の割合で共重合されていてもよ
い。
Embodiments of the present invention will be described below in detail. The polyester used in the present invention is a polytrimethylene terephthalate-based polyester whose repeating units are substantially composed of trimethylene terephthalate units. The term “substantially” as used herein means that even if it is a polytrimethylene terephthalate homopolyester, it is within a range that does not impair the effects of the present invention, usually 10 mol% or less, preferably 5 mol% based on all acid components. The following ratio indicates that a copolyester having a copolymer component may be used. Examples of the copolymerizable component include acid components such as isophthalic acid, succinic acid, adipic acid, 2,6-naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid, and tetrabutylphosphonium 5-sulfoisophthalate, and 1, Examples include glycol components such as 4-butanediol, 1,6-hexanediol, and cyclohexanedimethanol, and hydroxycarboxylic acid components such as ε-caprolactone and 4-hydroxybenzoic acid. Furthermore, in the case of a long-chain glycol component such as polyoxyethylene glycol and polytetramethylene glycol, 10% by weight or less based on the weight of the polyester,
Preferably, it may be copolymerized at a ratio of 5% by weight or less.

【0009】また、必要に応じて、各種の添加剤、例え
ば、艶消し剤、熱安定剤、消泡剤、整色剤、難燃剤、酸
化防止剤、紫外線吸収剤、赤外線吸収剤、結晶核剤、蛍
光増白剤などを、ポリエステルの重合時に添加して共重
合又は混合してもよいし、重合後のポリエステルに添加
して混合してもよい。
If necessary, various additives such as matting agents, heat stabilizers, defoaming agents, tinting agents, flame retardants, antioxidants, ultraviolet absorbers, infrared absorbers, crystal nuclei. An agent, a fluorescent whitening agent and the like may be added during the polymerization of the polyester and copolymerized or mixed, or may be added to the polyester after polymerization and mixed.

【0010】このようなポリエステルの固有粘度[I
V]は、0.4〜1.5好ましくは0.8〜1.2の範
囲が、紡糸の工程安定性と得られる延伸糸の機械的特性
の点から必要である。固有粘度が0.4未満の場合に
は、分子量が低すぎるために強度が低下するため好まし
くない。なお、固有粘度が0.4以上でも0.8未満の
場合には、1500m/分以下の低紡糸速度で巻取った
未延伸糸の安定性が不十分なため、経時変化により結晶
化が進行して安定に延伸することができなくなるだけで
なく、得られる延伸糸の品質にも斑を生じ易くなるの
で、0.8以上が好ましい。一方、固有粘度が1.5を
越える場合には、溶融粘度が高くなりすぎるため、紡糸
時にメルトフラクチャーや紡糸不良が生じるので好まし
くない。
The intrinsic viscosity of such a polyester [I
V] is required to be in the range of 0.4 to 1.5, preferably 0.8 to 1.2, from the viewpoint of spinning process stability and mechanical properties of the obtained drawn yarn. If the intrinsic viscosity is less than 0.4, the molecular weight is too low and the strength is reduced, which is not preferable. When the intrinsic viscosity is 0.4 or more and less than 0.8, crystallization proceeds due to aging because the stability of the undrawn yarn wound at a low spinning speed of 1500 m / min or less is insufficient. 0.8 or more is preferable because not only can the drawing be stably performed, but also the quality of the obtained drawn yarn tends to be uneven. On the other hand, if the intrinsic viscosity exceeds 1.5, the melt viscosity becomes too high, and melt fracture or poor spinning occurs during spinning, which is not preferable.

【0011】本発明においては、上記ポリトリメチレン
テレフタレート系ポリエステルを紡糸口金より溶融押出
し、該吐出糸条を送風領域を通過させて冷却固化させた
後にローラーを介して500〜4000m/分の速度で
引取る。
In the present invention, the above-mentioned polytrimethylene terephthalate-based polyester is melt-extruded from a spinneret, and the discharged yarn is cooled and solidified by passing through a blowing area, and then at a speed of 500 to 4000 m / min via a roller. Take over.

【0012】溶融押出し温度(紡糸温度)は、高すぎる
とポリマーの熱分解による着色や強伸度劣化が起りやす
く、一方低すぎると十分な強伸度の繊維を得ることが困
難になるので、250〜285℃の範囲が適当であり、
特に260〜280℃の範囲が好ましい。
[0012] If the melt extrusion temperature (spinning temperature) is too high, coloring and strong elongation degradation due to thermal decomposition of the polymer tend to occur, while if too low, it becomes difficult to obtain a fiber with sufficient strong elongation. The range of 250 to 285 ° C is appropriate,
Particularly, the range of 260 to 280 ° C is preferable.

【0013】溶融吐出した糸条は、送風領域を通過させ
て冷却固化させる前に、保温領域を通過させて急激な冷
却を抑制することが好ましい。この保温領域を通過させ
ることにより、ポリマーの急激な冷却による微細結晶や
高度に配向した非晶部分の生成が抑制され、後述する延
伸工程で延伸されやすい非晶構造を作ることができ、良
好な物性を有する繊維が安定して得ることができる。特
に本発明が対象とするポリトリメチレンテレフタレート
系ポリエステルは、例えばポリエチレンテレフタレート
等のポリエステルに比較すると遥かに速い結晶化速度を
有しているので、このような徐冷を行うことは、微細な
結晶や極度に配向した非晶部分の生成を抑制する上で極
めて有効な方法である。雰囲気温度は80〜220℃の
範囲が適当であり、なかでも100〜220℃、特に1
50〜200℃の範囲が適当である。また、この保温領
域の長さは5〜80cm、特に10〜40cmの範囲が
適当である。
It is preferable that the melt-discharged yarn is passed through a heat retaining region to suppress rapid cooling before passing through a blowing region to be cooled and solidified. By passing through this heat retaining region, the generation of fine crystals and highly oriented amorphous parts due to rapid cooling of the polymer is suppressed, and an amorphous structure that can be easily stretched in the stretching step described below can be formed, Fibers having physical properties can be obtained stably. In particular, the polytrimethylene terephthalate-based polyester targeted by the present invention has a much faster crystallization rate as compared to polyesters such as polyethylene terephthalate. This is an extremely effective method for suppressing the formation of highly oriented amorphous portions. The ambient temperature is suitably in the range of 80 to 220 ° C, especially 100 to 220 ° C, especially 1 to 220 ° C.
A range from 50 to 200C is suitable. Further, the length of the heat retaining region is suitably in the range of 5 to 80 cm, particularly 10 to 40 cm.

【0014】また、送風領域における風量は、少なすぎ
ると十分に冷却することが困難になって繊維物性のバラ
ツキ、糸斑が激しくなる傾向にあり、一方多すぎると風
による糸条の揺れが激しくなって糸斑が激しくなると共
に紡糸性も低下するので0.5〜2.5m3/分の範囲
とするのが適当であり、特に1.0〜2.0m3/分の
範囲が好ましい。
On the other hand, if the air volume in the air blowing region is too small, it is difficult to sufficiently cool the fiber, and there is a tendency that the physical properties of the fiber vary and the yarn spots become severe. It is appropriate to set the range to 0.5 to 2.5 m 3 / min, particularly preferably to 1.0 to 2.0 m 3 / min, since the wrinkles become severe and the spinnability decreases.

【0015】冷却固化された糸条は、ローラーを介して
500〜4000m/分の速度、好ましくは1500〜
3500m/分の速度で引取る必要がある。ここで引取
速度が500m/分未満の場合には、紡糸安定性の面で
は良好ではあるが、生産性が大きく低下するため好まし
くない。一方4000m/分を越える場合には、得られ
る未延伸糸の非晶部配向や部分的な結晶化が進みすぎ、
後述する延伸工程で十分な延伸倍率で延伸することが困
難になり、安定した生産性の下で十分な強度を有する延
伸糸を得ることが困難になるので好ましくない。なお、
引取る際のローラーの数は特に限定されず、単独でも2
以上の複数であってもよいが、通常は一対のローラー群
を介して引取られる。この際、第一のローラーと第二の
ローラーの回転速度(周速)は、紡糸安定性を損なわな
い範囲内で異ならしてもよいが、通常は同一速度とす
る。
The cooled and solidified yarn is passed through a roller at a speed of 500 to 4000 m / min, preferably 1500 to 4000 m / min.
It needs to be picked up at a speed of 3500 m / min. Here, when the take-off speed is less than 500 m / min, the spinning stability is good, but productivity is greatly reduced, which is not preferable. On the other hand, if it exceeds 4000 m / min, the orientation of the amorphous part and the partial crystallization of the obtained undrawn yarn are excessively advanced,
In the stretching step described below, it is difficult to stretch at a sufficient stretching ratio, and it is difficult to obtain a stretched yarn having sufficient strength under stable productivity, which is not preferable. In addition,
The number of rollers at the time of taking off is not particularly limited.
Although a plurality of the above may be used, they are usually taken out via a pair of rollers. At this time, the rotation speed (peripheral speed) of the first roller and the second roller may be different within a range that does not impair spinning stability, but is usually set to the same speed.

【0016】次いで引取られた糸条は、巻取り装置によ
り巻き取られるが、この際、巻取り張力を0.044〜
0.071cN/dtexの範囲、好ましくは0.04
9〜0.062cN/dtexの範囲とし、且つ巻取り
綾角を4.5〜6.0度、好ましくは5.0〜5.8度
の範囲として一旦未延伸糸として巻き取る。巻取り張力
が0.044cN/dtex未満の場合には引取りロー
ラーに糸条が巻付きやすくなるため好ましくない。逆に
0.071cN/dtexを超える場合にはポリトリメ
チレンテレフタレート系ポリエステルの高い弾性回復性
能に起因し、巻き締まりが発生して巻き姿が変形するた
め、それから得られる延伸糸は強度や染色性等に斑が発
生しやすくなるので好ましくない。なお、巻取り張力を
制御する方法は任意であるが、例えば巻取機の速度を引
取りローラー群の最終のローラーの速度よりも低くする
ことにより、容易に達成できる。
Next, the taken-up yarn is taken up by a take-up device.
0.071 cN / dtex range, preferably 0.04
The yarn is once wound as an undrawn yarn in a range of 9 to 0.062 cN / dtex and with a winding angle of 4.5 to 6.0 degrees, preferably 5.0 to 5.8 degrees. When the winding tension is less than 0.044 cN / dtex, it is not preferable because the yarn is easily wound around the take-up roller. On the other hand, if it exceeds 0.071 cN / dtex, the polytrimethylene terephthalate-based polyester has a high elastic recovery performance, which causes tightness in winding and deforms the wound shape, and the drawn yarn obtained therefrom has strength and dyeing properties. This is not preferable because spots are likely to be generated. The method of controlling the winding tension is arbitrary, but can be easily achieved by, for example, setting the speed of the winder lower than the speed of the final roller of the take-up roller group.

【0017】また、巻取り綾角綾角が4.5度未満の場
合には、綾落ちしやすくなって安定に巻取ることができ
なくなり、逆に6.0度を越える場合には糸の大きな収
縮力によって巻き姿が変形し、巻取り面とタッチローラ
ーとの接する部分にバラツキが生じてタッチローラーと
の接触面積が少なくなり、その結果接圧の集中が起こっ
てバーストしやすくなるので好ましくない。
On the other hand, if the winding angle is less than 4.5 degrees, the yarn tends to fall off and cannot be stably wound. A large shrinkage force deforms the winding shape, causing variations in the contact area between the winding surface and the touch roller, reducing the contact area with the touch roller, and as a result, the contact pressure tends to concentrate and burst, which is preferable. Absent.

【0018】なお、上記の紡糸工程においては、必要に
応じて糸条をインターレース等の交絡付与装置を通して
交絡を付与してもよい。その際、交絡付与装置は引取り
ローラーの前後いずれであってもよく、また、複数のロ
ーラー群を介して引取る場合にはその中間の位置であっ
てもよい。さらには、必要に応じて2ヶ所以上の位置で
交絡処理してもよい。
In the above-mentioned spinning step, the yarn may be entangled through a tangling device such as an interlace, if necessary. At that time, the entanglement imparting device may be located before or after the take-up roller, or may be located at an intermediate position when taking up via a plurality of roller groups. Further, the confounding processing may be performed at two or more positions as needed.

【0019】本発明においては、上記紡糸工程で一旦巻
取られた未延伸糸は、一段又は多段で熱延伸した後に巻
取り張力0.071〜0.132cN/dtex、好ま
しくは0.080〜0.120cN/dtexで巻き取
る。
In the present invention, the undrawn yarn once wound in the above-mentioned spinning step is subjected to one-stage or multi-stage heat drawing, and then to a winding tension of 0.071 to 0.132 cN / dtex, preferably 0.080 to 0. Wind at 120 cN / dtex.

【0020】延伸温度は、低すぎると均一な延伸を行う
ことが困難になり繊維性能に斑を生じやすくなり、一
方、高すぎると融着が発生しやすくなるので、50〜9
0℃の範囲が適当であり、特に60〜80℃の範囲が好
ましい。また、その際の延伸倍率は、低すぎると繊維特
性が不十分となり、一方高すぎると延伸時に毛羽や断糸
が発生しやすくなるので、該未延伸糸の該延伸温度にお
ける最大延伸倍率(DRMAX)の0.6〜0.95
倍、特に0.7〜0.9倍の範囲で延伸するのが適等で
ある。
If the drawing temperature is too low, it is difficult to perform uniform drawing and the fiber performance tends to be uneven, while if it is too high, fusion tends to occur.
A range of 0 ° C is appropriate, and a range of 60 to 80 ° C is particularly preferable. On the other hand, if the draw ratio is too low, the fiber properties become insufficient, while if it is too high, fluff or breakage tends to occur at the time of drawing. Therefore, the maximum draw ratio (DRMAX) of the undrawn yarn at the drawing temperature is high. ) Of 0.6 to 0.95
It is appropriate to stretch the film by a factor of, for example, 0.7 to 0.9.

【0021】延伸された糸条は、沸水収縮率を抑制する
ため、温度100〜170℃、好ましくは120〜15
0℃で熱セットを施す。熱セット温度が100℃未満の
場合にはセット効果が不十分で沸水収縮率が高くなる傾
向にあり、一方170℃を超える場合にはヒーターに糸
が融着して単糸切れや断糸が多発するようになる。な
お、熱セットに使用されるヒーターには特に制限はな
く、プレートヒーター、加熱ローラー、非接触ヒーター
等従来公知のヒーターを使用することができる。
The drawn yarn has a temperature of 100 to 170 ° C., preferably 120 to 15 ° C. in order to suppress the boiling water shrinkage.
Heat set at 0 ° C. When the heat setting temperature is lower than 100 ° C, the setting effect is insufficient and the boiling water shrinkage tends to increase. On the other hand, when the temperature exceeds 170 ° C, the yarn is fused to the heater and single yarn breakage or breakage occurs. It happens frequently. The heater used in the heat setting is not particularly limited, and a conventionally known heater such as a plate heater, a heating roller, and a non-contact heater can be used.

【0022】熱セットされた糸条は、例えばオーバーフ
ィード(最終延伸ローラーの速度に対して巻取りローラ
ーの速度を遅くする割合)を3〜10%とすることによ
り、巻取り張力0.071〜0.132cN/dte
x、好ましくは0.080〜0.120cN/dtex
で巻取る必要がある。ここで、巻取り張力が0.071
cN/dtex未満の場合には安定に巻取ることが困難
になり、逆に0.132cN/dtexを超える場合に
は、最終ローラーと巻取機の間で延伸が起こって得られ
る延伸糸の物性がばらついてしまうので好ましくない。
The heat-set yarn can be adjusted, for example, by setting the overfeed (the ratio of the speed of the winding roller to the speed of the final stretching roller to 3 to 10%) to a winding tension of 0.071 to 0.071%. 0.132cN / dte
x, preferably 0.080 to 0.120 cN / dtex
Need to be wound up. Here, the winding tension is 0.071
If it is less than cN / dtex, it is difficult to wind it stably. Conversely, if it exceeds 0.132 cN / dtex, physical properties of the drawn yarn obtained by drawing between the final roller and the winder It is not preferable because it varies.

【0023】以上に説明した本発明の製造方法により得
られるポリエステル繊維は、例えば衣料用途における一
般的な伸度である10〜45%に伸度を調整した場合、
強度は3.0〜5.0g/de、10%伸長時の弾性回
復率は85〜100%、熱応力のピーク値は0.265
〜0.883cN/dtex、沸水収縮率は5〜17%
の範囲の性能の繊維が得られる。
The polyester fiber obtained by the production method of the present invention described above can be obtained, for example, when the elongation is adjusted to 10 to 45%, which is a general elongation for clothing.
The strength is 3.0 to 5.0 g / de, the elastic recovery at 10% elongation is 85 to 100%, and the peak value of thermal stress is 0.265.
~ 0.883 cN / dtex, boiling water shrinkage 5-17%
Fibers having a performance in the range of

【0024】本発明者のさらなる詳細な検討によれば、
前記延伸熱セット条件を適宜選択して熱応力のピーク値
が0.353g/dtex以上、伸度が35%以下とな
るようにすれば、弾性回復性能は向上して10%伸長時
の弾性回復率が良好となりストレッチ性に優れた織編物
が得られること、熱応力のピーク値を高くしすぎて0.
706cN/dtexを超えるようにすれば、弾性回復
率は向上するものの収縮が大きくなりすぎるため織編密
度を低くしても得られる布帛が堅くなりやすいこと、沸
水収縮率を7%未満にすれば、熱応力のピーク値が十分
高くても収縮量が小くなりすぎるため得られる布帛はペ
ーパーライクになりやすいことが見出された。また、熱
応力のピーク温度は150〜180℃の範囲とするのが
適当であり、かくすれば、この温度範囲で得られる布帛
を熱セットすることにより、十分かつ適切に収縮処理す
ることができ、150℃未満では低すぎるため、使用時
にアイロンを当てる際、繊維の微細構造変化が起こりや
すいことが見出された。
According to a more detailed study of the inventor,
If the stretching heat setting conditions are appropriately selected so that the peak value of the thermal stress is 0.353 g / dtex or more and the elongation is 35% or less, the elastic recovery performance is improved and the elastic recovery at 10% elongation is improved. And a woven or knitted fabric having excellent stretchability can be obtained.
If it exceeds 706 cN / dtex, the elastic recovery rate is improved, but the shrinkage is too large, so that the obtained fabric tends to be hard even if the woven knitting density is lowered. If the boiling water shrinkage rate is less than 7%, Further, it has been found that even if the peak value of the thermal stress is sufficiently high, the amount of shrinkage becomes too small, so that the obtained fabric tends to be paper-like. Further, the peak temperature of the thermal stress is suitably in the range of 150 to 180 ° C., so that the cloth obtained in this temperature range can be subjected to a sufficient and appropriate shrinkage treatment by heat setting. If the temperature is lower than 150 ° C., it is found that the microstructure change of the fiber is likely to occur when ironing at the time of use.

【0025】本発明にかかるポリエステル繊維は、衣料
用途においてはマルチフィラメント糸が好ましい。その
際、総繊度は特に限定する必要はないが、通常は11〜
220dtex、特に33〜110dtexの範囲が適
当であり、単糸繊度も特に限定する必要はないが0.1
1〜5.6dtex、特に1.1〜3.3dtexの範
囲が適当である。また、繊維の断面形状は丸、三角、そ
の他の多角形、扁平、L型、W型、十字型、井型、ドッ
グボーン型等制限はなく、さらには中実繊維であっても
中空繊維であってもよい。
The polyester fiber according to the present invention is preferably a multifilament yarn for use in clothing. At this time, the total fineness does not need to be particularly limited, but is usually 11 to 11.
The range of 220 dtex, particularly 33 to 110 dtex is appropriate, and the single-fiber fineness need not be particularly limited.
An appropriate range is 1 to 5.6 dtex, particularly 1.1 to 3.3 dtex. The cross-sectional shape of the fiber is not limited, such as round, triangular, other polygonal, flat, L-shaped, W-shaped, cross-shaped, well-shaped, dog bone-shaped, etc. There may be.

【0026】[0026]

【実施例】以下、実施例をあげて本発明をさらに具体的
に説明する。なお、実施例中における各特性値は下記の
方法で測定した。
EXAMPLES The present invention will be described below more specifically with reference to examples. In addition, each characteristic value in an Example was measured by the following method.

【0027】(1)固有粘度 温度35℃のオルソクロロフェノールを溶媒として常法
にしたがって求めた。
(1) Intrinsic viscosity The intrinsic viscosity was determined according to a conventional method using orthochlorophenol at a temperature of 35 ° C. as a solvent.

【0028】(2)張力測定 東レ(株)社製TENSION ANALYZER M
ODELTTA−801を用い、紡糸の場合には最終引
取りローラーと巻取りローラーの間、延伸の場合には最
終延伸ローラーと巻取りローラー間で測定した。
(2) Tension measurement TENSION ANALYZER M manufactured by Toray Industries, Inc.
Using ODELTA-801, the measurement was performed between the final drawing roller and the winding roller in the case of spinning, and between the final drawing roller and the winding roller in the case of stretching.

【0029】(3)破断強伸度 島津製作所製オートグラフ引張試験機を用い、サンプル
長200mm、引張速度200mm/分で破断強度及び
伸度を試料3点につき測定し、その平均を求めた。
(3) Breaking strength and elongation Using an autograph tensile tester manufactured by Shimadzu Corporation, breaking strength and elongation were measured for three samples at a sample length of 200 mm and a tensile speed of 200 mm / min, and the average was determined.

【0030】(4)沸水収縮率(BWS) 試料を10回巻いて作った200mmのかせに、0.0
265cN/dtex(0.03g/de)の荷重をぶ
ら下げた時の長さL0を測定し、その後、無荷重の状態
で温度100℃の沸騰水中に30分浸した後、十分乾燥
させてから上記と同様の荷重をかけた時の長さL1を測
定する。沸水収縮率(BWS)を下記式から算出した。 BWS(%)=100×(L0−L1)/L0
(4) Boiling water shrinkage (BWS) A 200 mm skein made by winding a sample 10 times is 0.0
The length L 0 when a load of 265 cN / dtex (0.03 g / de) was hung was measured, and then immersed in boiling water at a temperature of 100 ° C. for 30 minutes with no load, and then dried sufficiently. measuring the length L 1 when applying the same load as described above. The boiling water shrinkage (BWS) was calculated from the following equation. BWS (%) = 100 × (L 0 −L 1 ) / L 0

【0031】(5)10%伸長時の弾性回復率 試料繊維を、チャック間距離250mmで引張試験機に
取付け、引張速度50mm/分で伸長率10%まで伸長
した後1分間放置する。次いで、引張と同じ50mm/
分の速度で元の試料長までもどし、この時応力がかかっ
ている状態でのチャックの移動距離(L’mm)を読み
とり、以下の式に従って求めた。 弾性回復率(%)=〔L’/25〕×100
(5) Elastic recovery rate at 10% elongation The sample fiber was attached to a tensile tester at a distance between chucks of 250 mm, stretched at an elongation rate of 10% at a pulling speed of 50 mm / min, and allowed to stand for 1 minute. Then, 50mm /
The sample length was returned to the original length at a speed of one minute, and the moving distance (L'mm) of the chuck under stress was read at this time, and was determined according to the following equation. Elastic recovery rate (%) = [L '/ 25] x 100

【0032】(6)熱応力 鐘紡エンジニアリング社製のKE−2を用いた。初過重
0.0442cN/dtex(0.05g/d)、昇温
速度100℃/分で測定した。得られたデーターを、横
軸に温度、縦軸に熱応力をプロットし、熱応力の最大点
の値を熱応力のピーク値とし、その時の温度を熱応力の
ピーク温度とした。
(6) Thermal stress KE-2 manufactured by Kanebo Engineering Co., Ltd. was used. It was measured at an initial load of 0.0442 cN / dtex (0.05 g / d) and at a heating rate of 100 ° C./min. The obtained data was plotted with the temperature on the horizontal axis and the thermal stress on the vertical axis. The maximum value of the thermal stress was defined as the peak value of the thermal stress, and the temperature at that time was defined as the peak temperature of the thermal stress.

【0033】[実施例1]固有粘度が1.025のポリ
トリメチレンテレフタレート定法により乾燥して水分を
50ppmにした後、265℃で溶融させ、直径0.3
mmの吐出孔を36個有する一重配列の紡糸口金を通し
て押出した。押出された溶融吐出糸条は、長さ10c
m、温度180℃の保温領域を通過させた後、風量1.
2m3/分の送風領域を通過させて急冷固化させた。次
にこの固化した糸条を速度2525m/分の第一ロール
及び速度2525m/分の第二ロールを介して引取り、
次いで速度2500m/分の巻取機で巻き取った。この
時、第二ロールと巻取りロール間の張力は0.056c
N/dtex(0.064g/de)であった。綾角は
5.5°に設定した。
Example 1 A polytrimethylene terephthalate having an intrinsic viscosity of 1.025 was dried by a conventional method to reduce the water content to 50 ppm, and then melted at 265 ° C. to obtain a diameter of 0.3.
It was extruded through a single-array spinneret having 36 mm discharge holes. The extruded melt discharge yarn has a length of 10c.
m, after passing through a heat-retaining region at a temperature of 180 ° C.
It was quenched and solidified by passing through an air blowing area of 2 m 3 / min. Next, the solidified yarn is taken up via a first roll at a speed of 2525 m / min and a second roll at a speed of 2525 m / min.
Next, the film was wound by a winder at a speed of 2500 m / min. At this time, the tension between the second roll and the take-up roll is 0.056c.
N / dtex (0.064 g / de). The twill angle was set to 5.5 °.

【0034】得られた未延伸糸は、延伸温度60℃、セ
ット温度(プレートヒーター)130℃、延伸倍率1.
8倍(DRMAXの0.82倍)、オーバーフィード率
5.6%、巻取速度500m/分の条件で一段延伸して
83dtex/36fil(75d/36f)の延伸糸
を得た。この時の巻取り張力は0.114cN/dte
x(0.13g/de)であった。紡糸延伸条件及び得
られた繊維の評価結果を表1に示す。紡糸、延伸過程で
糸切れ、毛羽の発生は認められず、巻取り姿も良好であ
った。また、弾性回復率は90%以上を示し、かつ筒網
染色結果において染斑も見られず良好なものであった。
The obtained undrawn yarn was drawn at a temperature of 60 ° C., at a set temperature (plate heater) of 130 ° C., at a draw ratio of 1.
Eight times (0.82 times DRMAX), an overfeed rate of 5.6%, and a winding speed of 500 m / min, the film was drawn in one step to obtain a drawn yarn of 83 dtex / 36fil (75d / 36f). The winding tension at this time is 0.114 cN / dte
x (0.13 g / de). Table 1 shows spinning and drawing conditions and evaluation results of the obtained fibers. No yarn breakage or fluff was observed during the spinning and drawing processes, and the wound appearance was good. In addition, the elastic recovery rate was 90% or more, and no staining was observed in the result of the dyeing by the net screen.

【0035】[実施例2〜6]実施例1において、表1
に記載のように紡糸延伸条件を変更する以外は実施例1
と同様に行って83dtex/36fil(75d/3
6f)の繊維を得た。紡糸延伸条件及び得られた繊維の
評価結果を合わせて表1に示す。いずれも紡糸、延伸過
程で糸切れ、毛羽の発生は認められず、巻取り姿も良好
であった。また、弾性回復率は85%以上を示し、かつ
筒網染色結果において染斑も見られず良好なものであっ
た。
[Examples 2 to 6] In Example 1, Table 1
Example 1 except that the spinning and drawing conditions were changed as described in
83dtex / 36fil (75d / 3
6f) was obtained. Table 1 shows the spinning stretching conditions and the evaluation results of the obtained fibers. In each case, no yarn breakage or fluff was observed during the spinning and drawing steps, and the wound appearance was good. Further, the elastic recovery rate was 85% or more, and no staining was observed in the result of the tube net dyeing.

【0036】[0036]

【表1】 [Table 1]

【0037】[比較例1〜6]実施例1のポリマーを用
いて、表2に示した条件で83dtex/36fil
(75d/36f)の繊維を得た。表2に示すようにい
ずれも本発明の範囲をはずれるものであり、巻き姿が耳
高で不良かつ染色斑が激しかった。
[Comparative Examples 1 to 6] Using the polymer of Example 1, 83 dtex / 36 fil under the conditions shown in Table 2.
(75d / 36f) fiber was obtained. As shown in Table 2, all of them were out of the range of the present invention, and the wound shape was poor at ear height and the staining spot was severe.

【0038】[0038]

【表2】 [Table 2]

【0039】[0039]

【発明の効果】本発明のポリエステル繊維の製造方法に
よれば、染色しても染色斑が発生し難く、且つ強度等も
良好な高品質のポリトリメチレンテレフタレート系ポリ
エステル繊維を安定して製造することができ、工業的価
値は極めて大きいものである。
According to the method for producing a polyester fiber of the present invention, a high-quality polytrimethylene terephthalate-based polyester fiber which is hardly stained even when dyed and has good strength is stably produced. The industrial value is extremely large.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 実質的にトリメチレンテレフタレート単
位から構成された固有粘度が0.4〜1.5のポリトリ
メチレンテレフタレート系ポリエステルを紡糸口金より
溶融押出し、該吐出糸条を送風領域を通過させて冷却固
化させた後にローラーを介して500〜4000m/分
の速度で引取り、次いで巻取り張力0.044〜0.0
71cN/dtexの下、巻取り綾角4.5〜6.0度
で巻取って未延伸糸を得る紡糸工程、及び、該未延伸糸
を一段又は多段で熱延伸した後に巻取り張力0.071
〜0.132cN/dtex巻取って延伸糸を得る延伸
工程とからなるポリエステル繊維の製造方法。
1. A polytrimethylene terephthalate polyester substantially consisting of trimethylene terephthalate units and having an intrinsic viscosity of 0.4 to 1.5 is melt-extruded from a spinneret, and the discharged yarn is passed through a blowing region. After cooling and solidifying by means of a roller, it is taken up through a roller at a speed of 500 to 4000 m / min, and then a winding tension of 0.044 to 0.0
A spinning step of winding at a winding angle of 4.5 to 6.0 degrees under 71 cN / dtex to obtain an undrawn yarn, and a winding tension of 0.1 after the undrawn yarn is hot-drawn in one or more stages. 071
A drawing step of winding up to 0.132 cN / dtex to obtain a drawn yarn.
【請求項2】 ポリトリメチレンテレフタレート系ポリ
エステルを紡糸温度250〜285℃で紡糸口金より押
出し、該吐出糸条を雰囲気温度が80〜220℃、長さ
5〜80cmの保温領域を通過させた後に送風領域を通
過させる請求項1記載のポリエステル繊維の製造方法。
2. A polytrimethylene terephthalate-based polyester is extruded from a spinneret at a spinning temperature of 250 to 285.degree. C., and the discharged yarn is passed through a heat retaining region having an atmospheric temperature of 80 to 220.degree. C. and a length of 5 to 80 cm. The method for producing a polyester fiber according to claim 1, wherein the polyester fiber is passed through a blowing area.
【請求項3】 送風領域の風量が0.5〜2.5m3
分である請求項1又は2記載のポリエステル繊維の製造
方法。
3. The air volume in the air blowing area is 0.5 to 2.5 m 3 /
The method for producing a polyester fiber according to claim 1, wherein
【請求項4】 延伸温度50〜90℃で未延伸糸の最大
延伸倍率の0.6〜0.95倍に延伸し、次いで温度1
00〜170℃で熱セットした後に巻取る請求項1〜3
のいずれか1項に記載のポリエステル繊維の製造方法。
4. Stretching at a stretching temperature of 50 to 90 ° C. to 0.6 to 0.95 times the maximum stretching ratio of the undrawn yarn,
4. Winding after heat setting at 00 to 170C.
The method for producing a polyester fiber according to any one of the above.
JP2000090775A 2000-03-29 2000-03-29 Method for producing polyester fiber Expired - Fee Related JP3693552B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100456305B1 (en) * 2002-04-01 2004-11-09 주식회사 효성 Method for producing metachromatic polytrimethyleneterephtalate fiber and the fiber
US7005093B2 (en) 2003-02-05 2006-02-28 E. I. Du Pont De Nemours And Company Spin annealed poly(trimethylene terephthalate) yarn
JP2011047069A (en) * 2009-08-26 2011-03-10 Teijin Fibers Ltd Impact-absorbing rope and method for producing impact-absorbing rope

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100456305B1 (en) * 2002-04-01 2004-11-09 주식회사 효성 Method for producing metachromatic polytrimethyleneterephtalate fiber and the fiber
US7005093B2 (en) 2003-02-05 2006-02-28 E. I. Du Pont De Nemours And Company Spin annealed poly(trimethylene terephthalate) yarn
JP2011047069A (en) * 2009-08-26 2011-03-10 Teijin Fibers Ltd Impact-absorbing rope and method for producing impact-absorbing rope

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