JPS60209012A - Preparation of polyester yarn - Google Patents

Abstract

PURPOSE:The titled yarn having improved mechanical properties and uniformly, by drawing polyester yarn obtained by melt spinning while introducing a specific flow rate of hot steam to a heating zone, providing it with a finishing oil at a specific position. CONSTITUTION:A thermoplastic polyester polymer is subjected to melt spinning from the spinneret 2 to give the polyester yarn Y, which is cooled once to <= the glass transition temperature by the chimney cooling column 3. The cooled yarn Y is made to travel a heating zone in the heating column 6, and drawin while introducing a hot gas having 10-80Nl/min, preferably 20-30Nl/min flow rate. The finishing oil feeder 8 is set at a position 25-100cm distance Xcm from the outlet at the bottom of the heating zone, the yarn Y is provided with a finishing oil, and wound by the rollers 9 and 10 at >=3,000/min winding speed, to give the desired polyester yarn.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は、ポリエステル繊維の製造方法に関するもので
ある。　゛ さらに詳しくは、紡糸工程のみの一工程で実用に供しう
る機械的性質、均一性を満足するポリエステル繊維を毛
羽、糸切れもなく安定に製造する方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for producing polyester fiber. More specifically, the present invention relates to a method for stably producing polyester fibers having practically usable mechanical properties and uniformity without fuzz or yarn breakage in a single spinning step.

〔従来技術とその問題点〕[Prior art and its problems]

従来から、製造コストの削減・省エネルギーなどの目的
で、ポリエステル繊維を紡糸工程のみの一工程で製造す
る方法が種々に提案されている。BACKGROUND ART Conventionally, various methods have been proposed for producing polyester fibers in a single step of spinning, for the purpose of reducing production costs and saving energy.

かかる方法の一例として、古くは特公昭４５−１９３２
号公報に開示されている如く、溶融紡糸した糸条を、一
旦ガラス転移温度以下まで冷却した後再び加熱帯域中を
通過せしめ、熱延伸する方法がある。An example of such a method is
As disclosed in the above publication, there is a method in which a melt-spun yarn is once cooled to below the glass transition temperature and then passed through a heating zone again for hot drawing.

一般に前記加熱帯域としては１周囲を加熱した加熱筒が
用いられるが、単に加熱筒の周囲を加熱して加熱筒内の
雰囲気温度を高温化して糸条を走行させるのみでは、加
熱筒内の雰囲気温度が不均一となり、得られる糸条は。Generally, a heating tube that heats the surrounding area is used as the heating zone, but simply heating the surrounding area of the heating tube to raise the atmosphere temperature inside the heating tube and running the yarn is not enough to reduce the atmosphere inside the heating tube. The temperature becomes uneven, and the resulting yarn.

均一性が悪化し、布帛にして染色した場合、染め斑とな
り。The uniformity deteriorates, resulting in uneven dyeing when dyed on fabric.

製品として使用できない。It cannot be used as a product.

又、かかる加熱筒を用いた場合、引取速度を高速化した
り、製造する糸条のフィラメント数を増加したりすると
、走行糸条の随伴気流が加熱筒内に流入し、雰囲気温度
が低下して、１％延伸が十分に行なえず、延伸床のため
糸条の均一性が低下する。In addition, when such a heating cylinder is used, when the take-up speed is increased or the number of filaments in the yarn to be produced is increased, the accompanying airflow of the running yarn flows into the heating cylinder, causing the atmospheric temperature to drop. , 1% stretching cannot be performed sufficiently, and the uniformity of the yarn deteriorates due to the stretching bed.

このような欠点を解消し、随伴気流による雰囲気温度低
下を防ぐため、特開昭５４−１５８６１３号公報などに
糸条を集束させ、随伴気流を除去しつつ加熱筒を通過せ
しめる方法が提案されているが、かかる方法においては
、糸条が集束しているため熱処理効率が低く、ａｏｏ℃
もの高温の条件を採用しなくてはならず、コスト的に高
くなるという欠点を有している。In order to overcome these drawbacks and prevent the ambient temperature from decreasing due to the accompanying airflow, a method has been proposed in Japanese Patent Application Laid-Open No. 158613/1983, in which the yarns are bundled and passed through a heating cylinder while removing the accompanying airflow. However, in such a method, the heat treatment efficiency is low because the yarns are bundled, and the heat treatment efficiency is low.
This method has the disadvantage of requiring high-temperature conditions, resulting in high costs.

父上記以外にも均一延伸実現のため加熱帯域中に糸条を
分割して導入し、随伴気流の影響を無（そうとする試み
（特開昭５１−１４７６１５号公報）や、加熱帯域中で
の糸の変形をできるだけ緩慢にさせるためｌｃ２つの加
熱帯域を通す試み（特開昭５４−１６０８１６号公報）
が提案されているが。In addition to the above, in order to achieve uniform stretching, yarns are divided into parts and introduced into the heating zone to eliminate the influence of accompanying air currents (Japanese Patent Application Laid-Open No. 147615/1989), and In order to make the deformation of the yarn as slow as possible, an attempt was made to pass the LC through two heating zones (Japanese Patent Application Laid-Open No. 160816/1983)
has been proposed.

これらは完全に随伴気流の影響を除去することができず
、十分に均一な糸条は得られない。These methods cannot completely eliminate the influence of entrained airflow, and a sufficiently uniform yarn cannot be obtained.

又、かかる加熱帯域による延伸方法では上述の如く、均
一゛な糸条が得られないだけでなく。Furthermore, as mentioned above, the drawing method using such a heating zone not only fails to produce a uniform yarn.

製造される糸条に多数の毛羽が混入したり、ひどい場合
には糸切れが多発するなどの問題がある。かかる傾向は
製造する糸の単糸デニールか細くなるにつれ！ｒＩＫ顕
在化する。There are problems such as a large amount of fluff mixed into the manufactured yarn, and in severe cases, yarn breakage occurs frequently. This tendency increases as the single yarn denier of the manufactured yarn becomes thinner! rIK manifests.

従って従来の技術においては、紡糸工程で加熱帯域に糸
条を通過させて熱延伸する方法において、低コストで機
械的性質、均一性が満足できるポリエステル糸条を、毛
羽、糸切れもなく安定して得るという技術は完成されな
い状況にある。Therefore, in the conventional technology, in the method of hot drawing by passing the yarn through a heating zone in the spinning process, it is possible to produce polyester yarn that is low cost, has satisfactory mechanical properties and uniformity, and is stable without fuzz or yarn breakage. The technology to obtain this information has not yet been perfected.

〔発明の目的〕[Purpose of the invention]

本発明者らは、紡糸工程で一旦冷却した糸条を再び加熱
帯域を通過せしめ熱延伸し実用に供しうる機械的性質、
均一性を満足するポリエステル繊維を一工程で製造する
方法について種々検討した結果、加熱帯域中に積極的に
加熱気体を導入すること及びその流量を適正な範囲にコ
ントロールすることにより、糸条の均一性が向上するこ
とを見出した。The present inventors have developed mechanical properties that can be used practically by passing the yarn once cooled in the spinning process through the heating zone again and hot drawing it.
As a result of various studies on methods for manufacturing polyester fibers that satisfy uniformity in a single process, we found that by actively introducing heated gas into the heating zone and controlling its flow rate within an appropriate range, uniform yarns can be achieved. It was found that sexual performance was improved.

さらに、加熱帯域を通過せしめ熱延伸を実現する本プロ
セスにおける紡糸糸切れ１毛羽が加熱帯域通過後に実施
する給油操作と深く関連があることを見出し本発明に至
ったものである。Furthermore, the inventors discovered that the fuzz of each broken spun yarn in this process of passing through a heating zone to achieve hot drawing is closely related to the oiling operation performed after passing through the heating zone, leading to the present invention.

〔発明の構成〕[Structure of the invention]

すなわち本発明は熱可塑性ポリエステル重合体を紡糸口
金から溶融紡糸し、ガラス転移温度以下まで一旦冷却し
た後、再び加熱帯域中に該糸条を走行せしめ、加熱帯域
中で該糸条を加熱延伸せしめる際に加熱帯域中に流量１
０〜８ＯＮｌＺ分の加熱気体を導入しつつ加熱延伸を行
ない、かつ加熱帯域下部出口からの距離Ｘ−が２５ＣＩ
ｌ＋以上１０　ｏｃ＊以下で糸条に給油操作を施しなが
ら引取速［３０００ｍ／分以上で引取ることを特徴とす
るポリエステル繊維の製造方法で、　ある。That is, in the present invention, a thermoplastic polyester polymer is melt-spun from a spinneret, once cooled to below the glass transition temperature, and then the yarn is run through the heating zone again, and the yarn is heated and drawn in the heating zone. When the flow rate 1 during the heating zone
Heating and stretching is performed while introducing heating gas of 0 to 8 ONlZ, and the distance X- from the lower exit of the heating zone is 25 CI.
A method for producing polyester fiber, characterized in that the yarn is taken up at a take-up speed of not less than 3000 m/min while lubricating the yarn at a rate of not less than l+ and not more than 10 oc*.

以下、本発明についてさらに詳細に説明する。The present invention will be explained in more detail below.

フタレー）ｔ−主たる繰り返し単位とするポリエステル
を主に対象とするが、ブチレンテレフタレートを繰り返
し単位とするポリエステルでａつ℃も良い。又、１５モ
ル係以下の量で他の成分を一種以上共重合したポリエス
テルおよび少量の添加剤を含有したポリエステルであっ
ても良い。phthalate) T-Although polyesters having a main repeating unit are mainly targeted, polyesters having butylene terephthalate as a repeating unit at a temperature of 1°C are also suitable. It may also be a polyester copolymerized with one or more other components in an amount of 15 molar or less, and a polyester containing a small amount of additives.

本発明において重要な点は、冷却後糸条が通過する加熱
帯域の雰囲気を周囲から加熱しつつ。An important point in the present invention is that the atmosphere in the heating zone through which the yarn passes after cooling is heated from the surroundings.

該加熱帯域に特定流量の加熱気体を導入すること及び加
熱帯域を出た糸条への給油条件を限られた条件下で実施
すること及び引取速［３０００ｍ／分以上で引取ること
の５点である。Five points: introducing a specific flow rate of heated gas into the heating zone, lubricating the yarn after it exits the heating zone under limited conditions, and taking the yarn at a take-up speed of 3000 m/min or more. It is.

すなわち１周囲を加熱し雰囲気温度を高めただけの加熱
帯域に糸条を通すだけでは、引皐速匿の上昇に伴って、
特に引取速度がｓｏｏｏｍＺ分以上から急激に得られる
糸条の均瞥−性が低下する。ところがこの際に加熱帯域
中に加熱気体を特定の条件を満足せしめて導入すると、
糸条のである。In other words, simply passing the yarn through a heating zone where the ambient temperature is increased by heating the surrounding area will result in an increase in the drawing speed.
In particular, when the take-up speed exceeds sooomZ, the uniformity of the yarn obtained decreases rapidly. However, when heating gas is introduced into the heating zone after satisfying specific conditions,
It is made of yarn.

本発明では、加熱帯域に導入する加熱気体の流量が本発
明の第１のポイントである。すなわち、加熱気体の流量
が１０〜８０１Ｊ／／分の時に限り１機械的性質も満足
でき、均一性も良好な糸条が得られるのである。流量が
１　ＯＮｌ！／分に満たないと、均一性が悪化し機械的
性質も低下して加熱気体導入の効果が十分に発揮されな
い。In the present invention, the first point of the present invention is the flow rate of the heated gas introduced into the heating zone. That is, only when the flow rate of the heated gas is 10 to 801 J/min, a yarn with satisfactory mechanical properties and good uniformity can be obtained. Flow rate is 1 ONl! If the heating time is less than /min, the uniformity deteriorates and the mechanical properties deteriorate, so that the effect of introducing the heated gas is not fully exhibited.

又流量が８ＯＮｌＺ分を越えると、逆に均一性が悪化し
、又１毛羽や糸切れが急激に増加して操業安定性が低下
する。本発明者らの観察によると、流量が８０Ｎｌ１分
を越えると、特に加熱帯域出入口での糸揺れが激しくな
り、糸条の走行状態が不安定であった。On the other hand, if the flow rate exceeds 8ONlZ, the uniformity deteriorates, and the number of fluffs and yarn breakage increases rapidly, resulting in a decrease in operational stability. According to the observations of the present inventors, when the flow rate exceeded 80 Nl 1 minute, the yarn swayed particularly at the entrance and exit of the heating zone, and the running state of the yarn became unstable.

＠ＶＣ均一性という観点からは、流量は１０〜５ＯＮｌ
！／分が好ましく、２０〜ｓ　ｏＮｌ／分とするとさら
に好ましい。@From the viewpoint of VC uniformity, the flow rate is 10 to 5 ONl
! /min is preferred, and 20 to soNl/min is more preferred.

この様に加熱帯域に特定流量の加熱気体を導入して始め
て均一な延伸が実現できるのである。In this way, uniform stretching can only be achieved by introducing a specific flow rate of heated gas into the heating zone.

しかしながら、かかる加熱帯域による延伸方法で糸を製
造する場合均一な延伸が実現できても。However, even though uniform stretching can be achieved when yarn is produced by such a heating zone stretching method.

巻取られた糸に毛羽が多数混入したり、ひどい場合糸切
れが多発するという問題がしばしば生ずる。このような
傾向は特に製造する糸の単糸繊度が細くなると顕在化す
る傾向にある。かかる問題について詳細に検討した結果
１本発明者らは加熱帯域を通過し延伸された糸条に対し
て行なう給油操作と毛羽、糸切れに大きな相関があるこ
とを見出した。すなわち、加熱帯域の出口と給油位置と
の間の距離ｘ１に２５≦Ｘ≦１００（ｃｌｌ＋）とする
ことが毛羽・糸切れを回避するために必須の要件である
ことが見出されたのである。Problems often arise in which a large amount of fuzz is mixed into the wound yarn, and in severe cases, the yarn breaks frequently. This tendency tends to become more apparent especially when the single yarn fineness of the yarn to be manufactured becomes finer. As a result of a detailed study of this problem, the present inventors found that there is a significant correlation between the oiling operation performed on the yarn that has passed through the heating zone and been drawn, and the occurrence of fuzz and yarn breakage. In other words, it was found that setting the distance x1 between the exit of the heating zone and the refueling position to 25≦X≦100 (cll+) is an essential requirement to avoid fluff and thread breakage. .

加熱帯域の出口と給油位置との間の距離Ｘが２５側より
小さ−いと毛羽、糸切れが多発するだけでなく、得られ
る糸条の機械的性質も低下する。If the distance X between the exit of the heating zone and the oil supply position is smaller than the 25 side, not only fuzz and yarn breakage occur frequently, but also the mechanical properties of the resulting yarn deteriorate.

これは加熱帯域を出た糸条が十分冷却しないうちに給油
操作を行なうことによると考えられる〇又距離Ｘが１０
０ｃＩｎより大きいと１毛羽、糸切れの増加と同時に均
一性が低下し１機械的性質も低下する傾向にあり好まし
くないのである。This is thought to be due to the fact that the refueling operation is performed before the yarn leaves the heating zone and has not sufficiently cooled down. Also, the distance X is 10
If it is larger than 0 cIn, the number of fuzz and thread breakage increases, the uniformity tends to decrease, and the mechanical properties also tend to decrease, which is not preferable.

かかる観点からはＸを２５≦Ｘ≦５５とするとより良好
な結果が得られ好ましい。この様に加熱帯域に１０〜８
ＯＮｌ！／分の加熱気体を導入し。From this point of view, it is preferable to set X to 25≦X≦55 because better results can be obtained. In this way, 10 to 8
ONl! /min of heated gas was introduced.

かつ加熱帯域出口と給油位置の距離Ｘを２５≦Ｘ≦１０
０（ｃｒｎ）とすることで始めて毛羽、糸切れもな（均
一な糸条が安定して得られるのである。And the distance X between the heating zone outlet and the refueling position is 25≦X≦10
By setting it to 0 (crn), it is possible to stably obtain a uniform yarn without fuzz or yarn breakage.

又本発明では、加熱帯域で熱延伸され給油操作を施され
た糸条を引取速［３０００ｍ／分以上で引暇るのである
。引取速度が３０００ｍ／分に満たないと、十分満足の
い（機械的性質の糸条が得られない。さらに、引取速ｒ
ＪＬ５０００ｍ／分未満では１本発明の如く加熱帯域に
加熱気体を導入することの効果とは逆に均一性が悪化す
る。Further, in the present invention, the yarn that has been hot drawn in the heating zone and subjected to the oiling operation is taken off at a take-up speed of 3000 m/min or more. If the take-up speed is less than 3,000 m/min, yarn with satisfactory mechanical properties cannot be obtained.
If the JL is less than 5000 m/min, uniformity deteriorates, contrary to the effect of introducing heating gas into the heating zone as in the present invention.

な２Ｓ本発明でいう加熱帯域としては、筒状あるいは横
断面が矩形状のチューブなどを用いることができるが、
糸条が走行する空間が加熱されておれば良いので、前記
形状に限定されるものではない。2S As the heating zone in the present invention, a tube having a cylindrical shape or a rectangular cross section can be used.
The shape is not limited to the above shape as long as the space in which the thread runs is heated.

又導入する加熱気体の温度は７０℃以上であれば良いが
１００〜ｂ い。The temperature of the heated gas to be introduced may be 70°C or higher, but it is preferably 100°C to 100°C.

さらに加熱気体を導入する加熱帯域は、その雰囲気温度
を高温に保つことが好ましい。すなわち、加熱帯域の内
壁面温度を高温に保つことが好ましく、ポリマのＴｇ（
ガラス転移Ｘ温度）以上であることが一層好ま・しい。Furthermore, it is preferable that the ambient temperature of the heating zone into which the heated gas is introduced is maintained at a high temperature. That is, it is preferable to maintain the inner wall surface temperature of the heating zone at a high temperature, and the Tg (
It is more preferable that the temperature is higher than the glass transition temperature (X temperature).

特に加熱帯域壁面が１５０〜５００℃の範囲が好ましい
結果を与える。Particularly favorable results are obtained when the temperature of the heating zone wall surface is in the range of 150 to 500°C.

ここで、加熱帯域の雰囲気を高温化させる方法は、加熱
帯域の周囲を電熱又は熱媒加熱する方法が一般的である
がこれに限られたものではない。Here, the method of raising the temperature of the atmosphere in the heating zone is generally a method of heating the periphery of the heating zone by electric heating or heating with a heating medium, but the method is not limited to this.

なお１本発明において加熱気体の導入は加熱帯域の上部
で糸条走行方向に対し略直行するように実施し１次いで
糸の走行方向に沿って加熱気体を走らせるこｉが、糸条
の均一性を高めることに対し効果的であり好ましい。Note that in the present invention, the heating gas is introduced in the upper part of the heating zone almost perpendicular to the yarn running direction, and the heating gas is then run along the yarn running direction to ensure uniform yarn formation. It is effective and preferable for increasing sex.

な−Ｐｌ、本発明において、給油操作はすでに述べた如
く、加熱帯域を出てか匂、糸に対して施すことが大切で
ある。加熱帯域に入る前に給油操作を施すことは、糸条
が昇温しにく（なり熱処理効率が低下したり、油剤の付
着斑がそのまま熱処理斑を反映したりすることになり好
ましくない。In the present invention, as already mentioned, it is important to perform the oiling operation on the yarn after it leaves the heating zone. It is undesirable to perform an oiling operation before entering the heating zone because it is difficult for the yarn to rise in temperature (as a result, the heat treatment efficiency decreases, and the adhesion spots of the oil agent directly reflect the heat treatment spots).

又加熱帯域を出た後の糸条への給油方法は。Also, what is the method for lubricating the yarn after it leaves the heating zone?

計量ガイド給油法、オイリングローラ−法、噴霧給油方
法などが適用されるが特にガイド給油法による場合が糸
条に均一な油剤付与が実現でき好ましい。なお、給油ガ
イドの接糸部の溝は実質的に曲率を有さない平担な形状
となし、かつ該溝巾を０．７〜２藺とするとさらに均一
な油剤付与が可能となり１毛羽、糸切れに対しより有効
となる。The metering guide lubrication method, the oiling roller method, the spray lubrication method, and the like are applicable, but the guide lubrication method is particularly preferred because it can uniformly apply the oil to the yarn. In addition, if the groove of the welding part of the oil supply guide has a flat shape with virtually no curvature, and the width of the groove is set to 0.7 to 2 mm, it becomes possible to apply the lubricant more uniformly. More effective against thread breakage.

以下に図をもって本発明の製造方法について更に詳しく
説明する。第１図は本発明の製造方法の一例を示す加熱
筒の縦断面図を含んだ紡糸工程図である。口金２から吐
出されたポリエステル糸条Ｙはチムニ−冷却筒３で室温
まで冷却された後、直ちに加熱筒６中に導入され、非集
束状態で加熱処理を受ける。加熱筒６の上部に糸道を堆
り囲む様に設けた整流用フィルター５の周囲に加熱気体
導入部４を設け、加熱気体をフィルター５を通しつつ導
入する。加熱筒６は周囲を電熱ヒーター７により加熱さ
れている。The manufacturing method of the present invention will be explained in more detail below with reference to the drawings. FIG. 1 is a spinning process diagram including a longitudinal cross-sectional view of a heating cylinder showing an example of the manufacturing method of the present invention. The polyester yarn Y discharged from the nozzle 2 is cooled down to room temperature in the chimney cooling cylinder 3, and then immediately introduced into the heating cylinder 6, where it is heated in a non-focused state. A heated gas introduction part 4 is provided around a rectifying filter 5 provided so as to surround a yarn path in the upper part of the heating cylinder 6, and the heated gas is introduced while passing through the filter 5. The circumference of the heating cylinder 6 is heated by an electric heater 7.

かかる加熱帯域中で加熱延伸された糸条Ｙは加熱筒下部
からＸＣｍ離れた給油位置の給油装置８により油剤を付
与された後、引取りローラー９゜１０により毎分３００
０ｍ以上の速度で引取られ。The yarn Y heated and drawn in the heating zone is coated with an oil agent by an oil supply device 8 located at an oil supply position XCm away from the bottom of the heating cylinder, and then drawn at a speed of 300 per minute by a take-up roller 9°10.
It was picked up at a speed of 0m or more.

必要に応じインターレーサー１１で又絡処理されながら
巻取機１２に巻取られる。The film is wound up by a winding machine 12 while being intertwined with an interlacer 11 if necessary.

なお、加熱気体としては空気の他に窒素、ヘリウムなど
の不活性ガスや水蒸気などを用いることができるが１％
に空気や不活性ガス類による場合が操業上の問題も少な
くて好ましい。In addition to air, inert gas such as nitrogen or helium or water vapor can be used as the heating gas, but 1%
It is preferable to use air or an inert gas for the purpose of reducing operational problems.

〔発明の効果〕〔Effect of the invention〕

上述の如く加熱帯域中に本発明で規定する流量の加熱気
体を導入し、かつ加熱帯域出口と給油装置の間の距離を
適切にコントロールしつつ引取速Ｅ３０００ｍ／分以上
でポリエステル糸条を引取ることで始めて機械的性質に
優れ、均一性良好な延伸糸が毛羽、糸切れもなく安定に
紡糸工程のみの一工程で製造できるのである。特に本発
明は単糸デテールが２デニール以下の細物の製造におい
て効果的であり、単糸デニール１デニール以下の極細品
種に適用するとさらにその効果があられれる。As mentioned above, heating gas is introduced into the heating zone at a flow rate specified by the present invention, and the polyester yarn is taken off at a taking-off speed of E3000 m/min or more while appropriately controlling the distance between the heating zone outlet and the oil supply device. Only then can a drawn yarn with excellent mechanical properties and good uniformity be produced stably without fuzz or yarn breakage in a single spinning process. Particularly, the present invention is effective in manufacturing thin products with a single yarn detail of 2 deniers or less, and its effects are even more pronounced when applied to ultrafine products with a single yarn detail of 1 denier or less.

なり１本発明により得られるポリエステル繊維は、従来
の延伸糸とほぼ同等の性質を有し。The polyester fiber obtained by the present invention has properties almost equivalent to those of conventional drawn yarn.

従来延伸糸が適用される全ての分野に使用できるという
優れた特性を有している。It has an excellent property that it can be used in all fields where drawn yarn is conventionally applied.

以下に実施例により本発明をさらに詳細に説明する。The present invention will be explained in more detail below using Examples.

なお、実施例中の物性は次の様にして測定したＯ Ａ、　強伸度 東洋ボールドウィン社製テンシロン引張り試験機を用い
て試料長２００３１１１　、引張りスピード１００Ｍ／
分の東件で測定し１強伸度をめた。In addition, the physical properties in the examples were measured as follows:
The elongation was measured at Token for a few minutes and the elongation was a little over 1.

Ｂ、　均一性（ウスター斑） ツエルベーガー社製つスター斑試験機により、糸速２５
ｍ／分、レンジ±１２．５係、チャート速度５■／分と
し繊維軸方向の太さ斑を測定し、０％値をめた。B. Uniformity (Worcester's mottling) Tested by Zellweger's Worcester's mottling tester at a yarn speed of 25
m/min, a range of ±12.5, and a chart speed of 5/min, thickness irregularities in the direction of the fiber axis were measured, and a value of 0% was taken.

実施例１ ポリエチレンテレフタレートヲ２９０℃で溶融し孔数３
６個の口金（孔径０，２履φ）から吐出した。吐出ポリ
マ置は１孔当たり１．１ｇ、７分とした。口金から吐出
した糸条に２５ｍ／分、２０℃の冷却風を長さ１ｍに渡
って当てて糸条を室温まで冷却した後、口金下２ｍＩＣ
設置した長さ１、５　ｍ、内径１５顛φの第１図に示し
た様な加熱筒に糸条を導入した。加熱筒の筒壁温度は２
３０℃とし、加熱筒の口金に近い側（上部）に絶対濾過
径２０μｍのＢｕｓ不織布の整流用フィルターを設け、
該フィルタ”−を通して加熱空気管導入した。加熱空気
の設定温度を２５０℃とし、流量を表１の如（変更しろ
つ加熱延伸を行なった。Example 1 Polyethylene terephthalate was melted at 290°C and the number of holes was 3.
It was discharged from six nozzles (hole diameter: 0, 2 mm). The polymer discharge position was 1.1 g per hole for 7 minutes. After cooling the yarn to room temperature by applying cooling air at 20°C over a length of 1 m at 25 m/min to the yarn discharged from the nozzle, a 2 m IC below the nozzle was applied.
The yarn was introduced into a heating cylinder as shown in FIG. 1 with a length of 1.5 m and an inner diameter of 15 mm. The temperature of the cylinder wall of the heating cylinder is 2
The temperature was set at 30°C, and a rectifying filter made of Bus nonwoven fabric with an absolute filtration diameter of 20 μm was installed on the side (upper part) of the heating cylinder near the mouthpiece.
A heated air tube was introduced through the filter. The heated air was set at a temperature of 250° C., and the flow rate was changed as shown in Table 1 for heating and stretching.

加熱筒を出４た糸条は加熱筒の下流４０σの所でガイド
給油装置により所定量の油剤が付与された後、引取速度
５０００ｍ／分で引取り、７０デニール５６フイラメン
トの糸条を得た。After leaving the heating cylinder, a predetermined amount of oil was applied to the yarn by a guide lubricating device at a position 40σ downstream of the heating cylinder, and the yarn was taken at a take-up speed of 5000 m/min to obtain a yarn of 70 denier and 56 filaments. .

得られた糸条の強伸度、Ｕ％値を表ＩＶＣ示した。The strength and elongation and U% values of the obtained yarns are shown in Table IVC.

表　１ 表１から明らかな如く１本発明の範囲内の流量１０〜８
ＯＮｌ！／分を満足する／Ｉ６５〜？では。Table 1 As is clear from Table 1, the flow rate within the range of the present invention is 10 to 8.
ONl! / satisfies the minute / I65~? Well then.

良好な強伸度の糸条が得られ、かつＵ％値も低く良好で
ある。特に流量が２０〜３ＯＮ／／分のＡ４．５では、
均一性もきわめて良好であり１毛羽もほとんど発生しな
いことがわかる。A yarn with good strength and elongation is obtained, and the U% value is also low and good. Especially in A4.5 where the flow rate is 20 to 3 ON//min,
It can be seen that the uniformity is also very good and almost no fuzz is generated.

しかしながら、流量が１　ＯＮｌ！／分に満たないＪ１
６１，２では機械的性質も低下しＵ％値も著しく大きく
なる。％に加熱空気を導入しないＡ１では、極端に均一
性が悪化することから本発明の加熱空気の導入の効果が
いかに大きいかがわかる。However, the flow rate is 1 ONl! /min J1
In case of 61,2, the mechanical properties also deteriorate and the U% value becomes significantly large. In A1, in which heated air was not introduced in %, the uniformity was extremely deteriorated, which shows how great the effect of introducing heated air according to the present invention is.

又、加熱空気流量がａ　ｏＮｌ１分を越えるＡ１０゜１
１では均一性も悪化し１毛羽の数も急激に増加する。In addition, A10°1 where the heated air flow rate exceeds a oNl1 minute
1, the uniformity deteriorates and the number of fluffs increases rapidly.

実施例２ 加熱筒に導入する加熱空気の流量を５ＯＮＩ！／分と一
定にし、加熱筒出口と給油位置の距離Ｘを表２の如く変
更する以外は実＃１例１と同一の条件で７０デニール−
５６フイラメントの糸条を得た。得られた糸条の強伸［
、Ｕ％値ｇよび毛羽発生数を合せて表２ＶＣ示した。Example 2 The flow rate of heated air introduced into the heating cylinder is 5 ONI! 70 denier under the same conditions as Example 1 of Example #1, except that the distance X between the heating cylinder outlet and the oil supply position was changed as shown in Table 2.
A yarn of 56 filaments was obtained. Strong elongation of the obtained yarn [
, U% value g, and number of fuzz occurrences are shown in Table 2VC.

表　２ 表２から明らかな如く、距離Ｘが２５〜１００を満足す
るＡ　Ｉ　４〜２０は強伸度値も問題なく。Table 2 As is clear from Table 2, when the distance X satisfies 25 to 100, A I 4 to 20 has no problem in strength and elongation values.

ｔｙｓ値も低く均一性良好でかつ毛羽もほとんどな（好
ましく、特にＸが２５〜５５を満足するん１４〜１７は
毛羽が全（なく、大変好ましいことがわかる。It can be seen that the tys value is low, the uniformity is good, and there is almost no fluff (preferably, especially when X satisfies 25 to 55, and 14 to 17 have no fluff at all, which is very preferable).

しかしながら、Ｘが２５〜１００を外れる扁１２．１３
，２１．２２では毛羽、糸切れの増加が顕著ｖｃなり好
ましくないことがわかる。However, when X is out of 25 to 100, 12.13
, 21.22, it can be seen that the increase in fuzz and yarn breakage is significant and undesirable.

実施例３ 加熱筒に導入する加熱空気の流量をｏＢｌび２ＯＮＪ／
分とし、引取速度、吐出量を表５の如く変更しながら、
実施例１と同一の条件で７θデニール−３６フイラメン
トの糸条を得た。得られた糸条の強伸Ｕ、Ｕ％値を表５
に合わせて示した。Example 3 The flow rate of heated air introduced into the heating cylinder is set to oBL and 2ONJ/
minutes, and while changing the take-up speed and discharge amount as shown in Table 5,
A 7θ denier-36 filament yarn was obtained under the same conditions as in Example 1. Table 5 shows the strong elongation U and U% values of the obtained yarn.
Shown accordingly.

表５より明らかな通Ｖ、引取速度が３００Ｏｎ／分より
低い４２５．２４の例では、加熱帯域を通過させて得た
糸条の強伸度が低く実用に供しうるレベルに至らないこ
とがわかる。又、引取速度が低いと加熱空気の流量が０
でも２０Ｎ１３／分でも強伸度特性に有意差はなく、均
一性は加熱空気導入により逆に悪化する傾向にある。It is clear from Table 5 that in the example of 425.24 where the thread V and take-up speed are lower than 300 On/min, the strength and elongation of the yarn obtained by passing through the heating zone is low and cannot reach a level that can be used for practical use. . Also, if the take-up speed is low, the flow rate of heated air is 0.
However, even at 20N13/min, there is no significant difference in strength and elongation properties, and the uniformity tends to deteriorate when heated air is introduced.

ところが、引取速１［３０００ｍ／分以上とすると、加
熱空気導入の効果が顕著になり１本発明で特定した流量
を満たした加熱空気を整流用フィルターを通して導入し
て始めて、機械的性質。However, when the take-up speed is set to 1 [3000 m/min or higher, the effect of introducing heated air becomes significant, and mechanical properties cannot be improved until heated air that satisfies the flow rate specified in the present invention is introduced through a rectifying filter.

拘−性とも良好な糸条が得られることがわかる。It can be seen that yarns with good binding properties can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の詳細な説明するための紡糸工程図であ
る。 １ニスピンブロツク ２：口　金 ３：冷却筒 ４：加熱気体導入部 ５：整流用フィルター ６：加熱筒 ７：電熱ヒーター ８：給油装置 ９：第１ゴデーローラ− １０：第２ゴデーローラ− １１：　インターレーサー １２：巻重機 特許出願人　東し株式会社 第１−１図FIG. 1 is a spinning process diagram for explaining the present invention in detail. 1 Nispin block 2: Mouth 3: Cooling tube 4: Heated gas introduction part 5: Rectifying filter 6: Heating tube 7: Electric heater 8: Oil supply device 9: First Godet roller 10: Second Godet roller 11: Inter Racer 12: Hoisting machine patent applicant Toshi Co., Ltd. Figure 1-1

Claims (1)

【特許請求の範囲】 熱可塑性ポリエステル重合体を紡糸口金から溶融紡糸し
、ガラス転移温度以下まで一旦冷却した後、再び加熱帯
域中に該糸条を走行せしめ。 加熱帯域中で該糸条を加熱延伸せしめる際に。 加熱帯域中に流量１０〜８０　ＮＩ！／分の加熱気体を
導入しつつ加熱延伸を行ない、かつ加熱帯域下部出口か
らの距離Ｘ（（７））が２５（１）以上１００（７）以
下で糸条に給油操作を施しながら引取速度３０００ｍ／
分以上で引取ることを特徴とするポリエステル繊維の製
造方法。[Claims] A thermoplastic polyester polymer is melt-spun from a spinneret, once cooled to below the glass transition temperature, and then the yarn is run through the heating zone again. When the yarn is heated and stretched in a heating zone. Flow rate 10-80 NI during heating zone! Heating and drawing is performed while introducing heated gas for 1/2 minute, and the distance X ((7)) from the lower exit of the heating zone is 25 (1) or more and 100 (7) or less, and the yarn is lubricated at a take-up speed. 3000m/
A method for producing polyester fiber, characterized in that it can be taken up in minutes or more.