JPH11200143A - Spinning of polyester - Google Patents
Spinning of polyesterInfo
- Publication number
- JPH11200143A JPH11200143A JP36687297A JP36687297A JPH11200143A JP H11200143 A JPH11200143 A JP H11200143A JP 36687297 A JP36687297 A JP 36687297A JP 36687297 A JP36687297 A JP 36687297A JP H11200143 A JPH11200143 A JP H11200143A
- Authority
- JP
- Japan
- Prior art keywords
- spinning
- yarn
- spinneret
- viscosity
- polymer
- 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
Links
Landscapes
- 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、紡口口金面の汚れ
を防止するポリトリメチレンテレフタレートの溶融紡糸
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 polytrimethylene terephthalate for preventing stains on a spinneret surface.
【0002】[0002]
【従来の技術】一般にポリエステルの溶融紡糸方法は、
紡口口金より溶融物を押し出すことにより行われれる。
このような紡糸においては、紡糸を開始してから時間が
経過するに従い口金吐出孔のまわりにリング状の汚れ
(以下「スケール」と称する)が堆積してくる。このス
ケールは吐出ポリマーの一部が口金面に残るため熱劣
化、酸化劣化のためゲル化などを起こし堆積すると考え
られている。2. Description of the Related Art In general, a melt spinning method of polyester comprises
This is performed by extruding the melt from a spinneret.
In such spinning, ring-shaped dirt (hereinafter, referred to as “scale”) is deposited around the nozzle discharge hole as time elapses from the start of spinning. This scale is considered to be deposited due to thermal degradation and oxidative degradation because a part of the discharged polymer remains on the die surface.
【0003】スケールは時間とともに増加し、その結
果、紡糸糸条の曲がり、ピクツキが発生するようにな
る。曲がり方がひどくなると口金表面に糸条が接触する
までになって糸が切れる現象が起こる。糸条が切れない
までも、曲がりやピクツキが大きくなると糸斑が大きく
なったり、毛羽の発生などが見られるようになり、満足
できる品質の糸を得ることが困難となってしまう。この
現象を抑制するために通常、シリコン系の離型剤を塗布
するが、口金面に付着した離型剤が時間の経過とともに
熱劣化や酸化劣化し、それにより離型性が低下し、上述
の現象を抑制する能力が低下してしまう。[0003] The scale increases with time, and as a result, the spun yarn bends and spiking occurs. If the bend becomes severe, a phenomenon occurs in which the yarn breaks until the yarn comes into contact with the surface of the die. Even if the yarn is not broken, if the bend or spike becomes large, yarn spots become large or fuzz is generated, and it becomes difficult to obtain a yarn of satisfactory quality. In order to suppress this phenomenon, a silicone-based release agent is usually applied, but the release agent attached to the die surface deteriorates over time with heat or oxidation, thereby degrading the releasability. The ability to suppress this phenomenon is reduced.
【0004】ポリエチレンテレフタレートに代表される
ポリエステルポリマーの通常の紡糸では、このような状
態になった口金面を清掃し離型剤を更新するためにワイ
ピングと呼ばれる操作を行う。しかし、この操作は多大
な人手を要し、その間の生産の中断、くずの発生など生
産効率を著しく低下させるためワイピング周期の延長が
望まれている。 とりわけポリトリメチレンテレフタ
レートは、グリコール成分としてトリメチレングリコー
ルを用いており、この構造のためにポリエチレンテレフ
タレートやポリブチレンテレフタレートに比べて熱劣化
や酸化劣化が起きやすく、またポリマー自体の金属への
付着しやすさなどのために、特に上記のようなスケール
の堆積が激しく、ワイピング周期が短くなってしまうと
いう重大な欠点を有する。従って、単に公知の紡糸安定
化方法を適用しても十分な紡糸安定性を得ることができ
なかった。In ordinary spinning of a polyester polymer typified by polyethylene terephthalate, an operation called wiping is performed to clean the die surface in such a state and renew the release agent. However, this operation requires a great deal of manpower, and it is desired to extend the wiping cycle in order to significantly reduce production efficiency such as interruption of production and generation of waste. In particular, polytrimethylene terephthalate uses trimethylene glycol as the glycol component, and its structure makes it more susceptible to thermal and oxidative degradation than polyethylene terephthalate and polybutylene terephthalate. Because of the easiness and the like, there is a serious disadvantage that the scale is particularly heavily deposited and the wiping cycle is shortened. Therefore, sufficient spinning stability could not be obtained simply by applying a known spinning stabilization method.
【0005】ワイピング周期の延長を目的とし、口金下
を窒素などの不活性気体でシールし、付着ポリマーの酸
化劣化を抑制する方法が知られている(特開昭52−1
5613号公報等)。しかし、この方法では不活性気体
シール自体に起因する紡糸糸切れが多発してしまい、工
業的に用いることは困難であった。また、口金下を水蒸
気でシールし、付着ポリマーの酸化劣化を抑制し、更に
水蒸気による解重合により付着ポリマーを低分子状物に
し除去されやすくする方法も知られている(特開昭52
−15613号公報等)。しかし、ポリエステルの場
合、水蒸気が原因となって触媒などに含まれている金属
添加物の変成が起こり、この変成物が吐出孔の周囲に堆
積し、紡糸性の悪化をもたらしてしまう。更に、口金面
直下を特定の露点範囲に保った空気雰囲気とすることも
知られている(特開昭57−56515号公報)。しか
しこの方法でも、根本的に紡口金に付着するポリマーの
量を減らすことは不可能であり、紡口金に付着しやす
く、劣化の激しいポリマーではワイピング周期延長の効
果は十分とは言えない。For the purpose of extending the wiping cycle, a method has been known in which the space under the base is sealed with an inert gas such as nitrogen to suppress the oxidative deterioration of the adhered polymer (Japanese Patent Laid-Open No. 52-1).
No. 5613). However, in this method, spun yarn breakage due to the inert gas seal itself frequently occurs, and it has been difficult to industrially use the spun yarn. There is also known a method in which the bottom of the base is sealed with steam to suppress the oxidative deterioration of the attached polymer, and furthermore, the attached polymer is reduced to a low molecular weight substance by depolymerization with steam so as to be easily removed (Japanese Patent Laid-Open No. Sho 52).
No. 15613). However, in the case of polyester, the water vapor causes transformation of the metal additive contained in the catalyst and the like, and this transformation deposits around the discharge holes, resulting in deterioration of spinnability. It is also known that an air atmosphere is maintained just below the base surface in a specific dew point range (Japanese Patent Application Laid-Open No. 57-56515). However, even with this method, it is impossible to fundamentally reduce the amount of the polymer adhering to the spinneret, and the effect of extending the wiping cycle cannot be said to be sufficient for a polymer that easily adheres to the spinneret and deteriorates drastically.
【0006】ポリトリメチレンテレフタレートの溶融紡
糸方法としては、いくつかの方法が知られている(特開
昭52−5320号公報、特開昭52−8124号公
報、特開平8−284015号公報等)。しかし、これ
らの中にワイピング周期延長のための手だては記載され
てなく、これらの方法で紡糸を行うと口金面へのスケー
ルの堆積が激しく、かなり頻繁にワイピングを行う必要
があるため多大な人手を要し、その間の生産の中断、く
ずの発生などにより生産効率は著しく低下してしまう。[0006] As a method for melt spinning polytrimethylene terephthalate, several methods are known (JP-A-52-5320, JP-A-52-8124, JP-A-8-284015, etc.). ). However, there is no description of a method for extending the wiping cycle in these methods, and when spinning is performed by these methods, scale deposits on the surface of the die are severe, and wiping must be performed quite frequently. The production efficiency is remarkably reduced due to interruption of production and generation of debris during that time.
【0007】[0007]
【発明が解決しようとする課題】本発明は、上記従来の
ポリエステル紡糸方法の欠点を改良し、ワイピング周期
の延長が可能で、糸品質の良好な糸を得ることのでき
る、ポリトリメチレンテレフタレートの紡糸方法に関す
るものである。DISCLOSURE OF THE INVENTION The present invention is directed to a polytrimethylene terephthalate which can improve the above-mentioned drawbacks of the conventional polyester spinning method, can extend the wiping cycle, and can obtain a yarn having good yarn quality. The present invention relates to a spinning method.
【0008】[0008]
【課題を解決するための手段】本発明者らは、上記欠点
を解決すべく鋭意検討を重ねた結果、特定の紡糸条件と
するとともに、特定の離型剤を用いることにより、ポリ
トリメチレングリコールを紡糸する際のワイピング周期
を延長することができ、糸径むらなどの少ない、糸品質
の良好な糸を得ることのできる紡糸方法を提供するに至
った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned drawbacks. As a result, the polytrimethylene glycol can be obtained by using specific spinning conditions and using a specific release agent. The present invention has provided a spinning method which can extend the wiping cycle when spinning the yarn and can obtain a yarn with good yarn quality with less unevenness in the yarn diameter.
【0009】すなわち本発明の第一は、紡口表面温度が
230〜280℃であり、且つメチルフェニルシリコン
とジメチルシリコンを含有し、粘度が2000〜800
0cpoiseであるシリコン系離型剤を紡口口金面に
塗布することを特徴とするポリトリメチレンテレフタレ
ートの溶融紡糸方法である。また、本発明の第二は紡口
の単一孔を通過するポリマーの表面積が5000〜30
000mm2 /分であることを特徴とする第一発明のポ
リトリメチレンテレフタレートの溶融紡糸方法である。That is, a first aspect of the present invention is that the spinning surface temperature is 230 to 280 ° C., which contains methylphenyl silicon and dimethyl silicon, and has a viscosity of 2000 to 800.
This is a method for melt spinning polytrimethylene terephthalate, which comprises applying a silicone-based release agent of 0 cpoise to the spinneret surface. Further, the second aspect of the present invention is that the surface area of the polymer passing through a single hole of the spinning nozzle is 5,000 to 30.
The melt spinning method of the polytrimethylene terephthalate according to the first invention, wherein the melt spinning rate is 000 mm 2 / min.
【0010】本発明の紡糸方法はフィラメント、ステー
プルいずれの製造にも適用されるが、特に、延伸後の単
糸デニールが5デニール以下の細デニールのフィラメン
トの製造に効果的に適用できる。本発明におけるポリト
リメチレンテレフタレートとは、酸成分としてテレフタ
ル酸を用い、グリコール成分としてトリメチレングリコ
ールを80モル%以上含有したポリエステルポリマーを
示している。本発明においてトリメチレングリコールと
しては、1,3−プロパンジオール、1,2−プロパン
ジオール、1,1−プロパンジオール、2,2−プロパ
ンジオールあるいは、これらの混合物の中から選ばれる
が、安定性の観点から1,3−プロパンジオールが特に
好ましい。The spinning method of the present invention can be applied to the production of both filaments and staples. In particular, it can be effectively applied to the production of fine denier filaments having a denier of 5 denier or less after drawing. The polytrimethylene terephthalate in the present invention refers to a polyester polymer containing terephthalic acid as an acid component and containing at least 80 mol% of trimethylene glycol as a glycol component. In the present invention, the trimethylene glycol is selected from among 1,3-propanediol, 1,2-propanediol, 1,1-propanediol, 2,2-propanediol, and a mixture thereof. From the viewpoint of 1,3-propanediol is particularly preferred.
【0011】本発明に用いるポリトリメチレンテレフタ
レートには、必要に応じて本発明の効果を損なわない範
囲で、酸成分としてイソフタル酸、コハク酸、アジピン
酸、2,6ーナフタレンジカルボン酸などや、グリコー
ル成分としてエチレングリコール、1,4ーブタンジオ
ール、1,6−ヘキサンジオール、ポリオキシアルキレ
ングリコールなどのグリコール成分が共重合されていて
も良い。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、難燃剤、帯電防止剤、消泡剤などを共
重合または混合しても良い。本発明に用いるポリマー
は、公知のポリエステル重合方法により重合することが
できる。In the polytrimethylene terephthalate used in the present invention, if necessary, isophthalic acid, succinic acid, adipic acid, 2,6-naphthalenedicarboxylic acid, etc. may be used as long as the effects of the present invention are not impaired. A glycol component such as ethylene glycol, 1,4-butanediol, 1,6-hexanediol, or polyoxyalkylene glycol may be copolymerized as the glycol component. If necessary, various additives such as a matting agent, a heat stabilizer, a flame retardant, an antistatic agent, and an antifoaming agent may be copolymerized or mixed. The polymer used in the present invention can be polymerized by a known polyester polymerization method.
【0012】本発明の紡糸方法において、ポリトリメチ
レンテレフタレートの極限粘度[η]は0.4〜1.4
であることが好ましい。極限粘度[η]が1.4を超え
ると、溶融粘度が高くなり通常の紡糸機での押出しが困
難となるだけではなく、紡口表面に付着しやすくなって
しまう。極限粘度が0.4未満だと繊維強度など機械的
物性が低下してしまう。好ましい極限粘度[η]は、
0.5〜0.9の範囲である。In the spinning method of the present invention, the intrinsic viscosity [η] of polytrimethylene terephthalate is 0.4 to 1.4.
It is preferred that When the intrinsic viscosity [η] exceeds 1.4, the melt viscosity becomes high and not only becomes difficult to extrude with a usual spinning machine, but also tends to adhere to the spinning surface. If the intrinsic viscosity is less than 0.4, mechanical properties such as fiber strength are reduced. Preferred intrinsic viscosity [η] is
It is in the range of 0.5 to 0.9.
【0013】本発明の溶融紡糸においては、紡口表面温
度が230〜280℃であることが必要である。紡口表
面温度230℃未満では、溶融粘度が高くなり、押出が
困難となり、また280℃を超えると溶融粘度が低下す
るためにポリマーが紡口口金面に付着しやすくなるとと
もに、付着したポリマーの劣化が激しくなり、スケール
の堆積が激しくなってしまう。紡口表面温度は好ましく
は235℃〜265℃である。In the melt spinning of the present invention, the surface temperature of the spinning nozzle needs to be 230 to 280 ° C. If the surface temperature of the spinneret is lower than 230 ° C., the melt viscosity becomes higher and extrusion becomes difficult. If the temperature exceeds 280 ° C., the melt viscosity decreases, so that the polymer easily adheres to the surface of the spinneret, Deterioration becomes severe and scale deposition becomes severe. The spinning surface temperature is preferably from 235C to 265C.
【0014】本発明では、メチルフェニルシリコンとジ
メチルシリコンを含有し、溶液粘度が2000〜800
0cpoiseであるシリコン系離型剤を紡口口金面に
塗布することも必要である。離型剤がメチルフェニルシ
リコンとジメチルシリコンを含有していることにより、
離型剤の耐熱性、離型性が向上し、ワイピング周期の延
長が見られる。これらの成分の割合はフェニル成分が4
0〜80重量部、ジメチルシリコンが60〜20重量部
の範囲であることが好ましい。離型剤の粘度はスケール
の堆積を押さえる上で非常に重要である。粘度が200
0cpoise未満では離型剤の粘度が低すぎるため、
吐出孔周囲の離型剤が短時間のうちにポリマーに付着
し、なくなってしまい、離型効果を長時間持続すること
ができない。一方、粘度が8000cpoiseを越え
ると粘度が高すぎるため、離型性に劣り、かえってスケ
ールの堆積を促進してしまう。離型剤の粘度は3000
〜7000cpoiseが好ましい。離型剤には上記の
成分以外にもSiO2 など他の物質が含有されていても
良い。The present invention contains methylphenylsilicon and dimethylsilicon, and has a solution viscosity of 2000 to 800.
It is also necessary to apply a silicone-based release agent that is 0 cpoise to the spinneret surface. The release agent contains methylphenyl silicon and dimethyl silicon,
The heat resistance and releasability of the release agent are improved, and the wiping cycle is extended. The proportion of these components is 4% for the phenyl component.
It is preferable that the amount is 0 to 80 parts by weight and the amount of dimethyl silicon is 60 to 20 parts by weight. The viscosity of the release agent is very important in suppressing the scale deposition. Viscosity 200
If the viscosity is less than 0 cpoise, the viscosity of the release agent is too low.
The release agent around the discharge hole adheres to the polymer in a short time and disappears, and the release effect cannot be maintained for a long time. On the other hand, if the viscosity exceeds 8000 cpoise, the viscosity is too high, so that the releasability is inferior, and the deposition of scale is rather accelerated. The viscosity of the release agent is 3000
~ 7000 cpoise is preferred. The release agent may contain other substances such as SiO 2 in addition to the above components.
【0015】離型剤の塗布は紡口をワイピングした後に
行うが、これ以外の時にスプレーなどで吹きかけてもよ
い。本発明では紡口の単一孔を通過するポリマーの表面
積が5000〜30000mm2 /分であることが重要
である。紡口口金面に付着するスケールは、吐出ポリマ
ーの一部が孔周囲に残るために発生する。従って、孔周
囲と接触するポリマーの量を減らすことが重要である。
このためには単一孔を通過するポリマーの表面積を一定
の値とすることが必要である。単一孔を通過するポリマ
ーの表面積が30000mm2 /分を越えると、孔周囲
にポリマーが多量に残るためスケールの発生が多くな
り、ワイピング周期が短くなってしまう。一方、500
0mm2/分未満では吐出ポリマー量が少ないために生
産性が非常に悪化し、また紡口口径を大きくしないとい
けないため、良好な力学物性を有する糸を得るためには
ドラフトを高くする必要があり、その結果糸切れが多発
してしまう。好ましい範囲は7000〜25000mm
2 /分であり、更に好ましい範囲は10000〜200
00mm2 /分である。The release agent is applied after wiping the spinning nozzle, but may be sprayed at other times. In the present invention it is important that the surface area of the polymer passing through a single hole of the spinning nozzle is 5000~30000mm 2 / min. The scale attached to the spinneret surface is generated because a part of the discharged polymer remains around the pores. Therefore, it is important to reduce the amount of polymer that contacts the perimeter of the pore.
For this purpose, it is necessary to make the surface area of the polymer passing through a single hole constant. If the surface area of the polymer passing through a single hole exceeds 30,000 mm 2 / min, a large amount of polymer remains around the hole, so that the scale is increased and the wiping cycle is shortened. On the other hand, 500
If it is less than 0 mm 2 / min, productivity is extremely deteriorated due to a small amount of discharged polymer, and since the diameter of the spinning nozzle must be increased, it is necessary to increase the draft to obtain a yarn having good mechanical properties. Yes, and as a result, thread breakage occurs frequently. The preferred range is 7000 to 25000 mm
2 / min, and a more preferred range is 10,000 to 200.
00 mm 2 / min.
【0016】紡口の形状は特に規定されるものではな
く、丸断面、三角断面、中空断面などに適用される。紡
口から吐出され、紡口直下で急冷された繊維束は引き取
られて未延伸糸として巻き取られ、公知の方法で延伸さ
れる。引き取りに際しては、繊維束を集束し、公知の給
油や予備交絡を付与する。The shape of the spout is not particularly limited, and is applied to a round cross section, a triangular cross section, a hollow cross section and the like. The fiber bundle discharged from the spinneret and quenched immediately below the spinneret is taken out, wound up as an undrawn yarn, and drawn by a known method. At the time of collection, the fiber bundles are bundled, and a known lubrication or pre-entanglement is applied.
【0017】未延伸糸の巻き取り速度は、1000〜5
000m/分の速度が好ましく、特に好ましくは強度発
現の観点から1500〜3500m/minである。紡
糸速度が5000m/分を超えると、糸径むらが大きく
なってしまう。また延伸を行う場合は、紡糸過程で分子
の結晶化が進みすぎて、延伸で十分な配向延伸が困難に
なる。また、紡糸速度が1000m/min未満では未
延伸糸の配向度があまり高くならないため、後に続く延
伸で分子を十分に配向することが困難となり、十分な強
度を発現することが困難となってしまう。The winding speed of the undrawn yarn is 1000 to 5
The speed is preferably 000 m / min, and particularly preferably from 1500 to 3500 m / min from the viewpoint of strength development. If the spinning speed exceeds 5000 m / min, the yarn diameter unevenness will increase. In the case of stretching, the crystallization of molecules progresses too much during the spinning process, and it is difficult to perform sufficient orientation stretching by stretching. Further, when the spinning speed is less than 1000 m / min, the degree of orientation of the undrawn yarn does not become so high, so that it is difficult to sufficiently orient the molecules in subsequent drawing, and it is difficult to develop sufficient strength. .
【0018】本発明により得られた繊維は巻き取った後
に延伸を行っても行わなくても良い。延伸を行う場合
は、未延伸糸を一旦巻き取った後延伸しても良く、また
一旦巻き取ることなく2つ以上のゴデットロール間で連
続して延伸しても良い。延伸倍率は、通常1.5〜3.
5倍が好ましい。延伸倍率は未延伸糸の巻取速度、糸種
によって異なるが、破断延伸倍率の70〜99%で延伸
することが好ましい。The fiber obtained according to the present invention may or may not be drawn after winding. In the case of drawing, the undrawn yarn may be once wound and then drawn, or may be continuously drawn between two or more godet rolls without being once wound. The stretching ratio is usually 1.5-3.
Five times is preferred. Although the draw ratio varies depending on the winding speed and the yarn type of the undrawn yarn, it is preferable that the drawing be performed at 70 to 99% of the breaking draw ratio.
【0019】延伸温度は、30℃〜80℃、好ましくは
35℃〜70℃、更に好ましくは45℃〜60℃が良
い。延伸温度が35℃未満では、延伸の最に糸切れが多
発し連続した延伸ができない。延伸温度が80℃を越え
ると、延伸ロールなどでの滑り性が悪化し単糸切れが多
発し安定な延伸が困難となる。延伸した糸は熱処理を行
う必要がある。延伸後の熱処理は、90℃〜200℃、
好ましくは100℃〜190℃で行う必要がある。熱処
理温度が90℃未満では繊維の結晶化度を十分に高くす
ることができず、良好な力学物性を有した繊維を得るこ
とが困難となってしまう。熱処理温度が200℃以上で
は繊維の破断が起こり易くなり連続して熱処理を行うこ
とが困難となってしまう。The stretching temperature is preferably 30 ° C. to 80 ° C., preferably 35 ° C. to 70 ° C., and more preferably 45 ° C. to 60 ° C. When the stretching temperature is lower than 35 ° C., yarn breakage occurs frequently at the time of stretching, and continuous stretching cannot be performed. If the stretching temperature exceeds 80 ° C., the slipperiness with a stretching roll or the like is deteriorated, and single yarn breakage occurs frequently, making stable stretching difficult. The drawn yarn needs to be subjected to a heat treatment. Heat treatment after stretching is 90 ° C to 200 ° C,
Preferably, it is necessary to carry out at 100 ° C to 190 ° C. If the heat treatment temperature is lower than 90 ° C., the crystallinity of the fiber cannot be sufficiently increased, and it is difficult to obtain a fiber having good mechanical properties. If the heat treatment temperature is 200 ° C. or higher, the fibers are likely to break, making it difficult to perform heat treatment continuously.
【0020】[0020]
【発明の実施の形態】以下、実施例などを用いて本発明
を更に詳細に説明するが、本発明は実施例などにより限
定されるものではない。なお、実施例中の主な測定値は
以下の方法で測定した。 (1)極限粘度[η] 極限粘度[η]は次の定義式に基づいて求められる値で
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to examples and the like, but the present invention is not limited to the examples and the like. In addition, the main measurement value in an Example was measured by the following method. (1) Intrinsic viscosity [η] Intrinsic viscosity [η] is a value obtained based on the following definition formula.
【0021】[0021]
【式1】 定義式のηrは、純度98%以上のo−クロロフェノー
ルで溶解したポリトリメチレンテレフタレートの希釈溶
液の35℃での粘度を、同一温度で測定した上記溶剤自
体の粘度で割った値であり、相対粘度と定義されている
ものである。また、Cは上記溶液100ml中のグラム
単位による溶質重量値である。(Equation 1) Ηr in the definition formula is a value obtained by dividing the viscosity at 35 ° C. of a diluted solution of polytrimethylene terephthalate dissolved in o-chlorophenol having a purity of 98% or more by the viscosity of the solvent itself measured at the same temperature, It is defined as relative viscosity. C is the solute weight value in grams in 100 ml of the solution.
【0022】(2)単一孔を通過するポリマーの表面積 単一孔を通過するポリマーの表面積は次の式に従って求
めた。 表面積=(V×M)/(ρ×S)(mm2 /分) V:単一孔の吐出量(g/分) ρ:ポリマーの密度(g/mm3 ) S:孔の断面積(mm2 ) M:孔の周長(mm) (3)離型剤粘度 B型粘度計を用いて室温にて測定を行った。 (4)ワイピング周期 各実施例の紡糸条件にて5回紡糸を行い、糸切れの発生
が見られるまでの時間の平均値をワイピング周期とし
た。(2) Surface area of polymer passing through a single hole The surface area of a polymer passing through a single hole was determined according to the following equation. Surface area = (V × M) / (ρ × S) (mm 2 / min) V: Discharge rate of single hole (g / min) ρ: Density of polymer (g / mm 3 ) S: Cross-sectional area of hole ( mm 2 ) M: Perimeter of pore (mm) (3) Viscosity of release agent Measured at room temperature using a B-type viscometer. (4) Wiping cycle The spinning was performed five times under the spinning conditions of each example, and the average value of the time until the occurrence of thread breakage was defined as the wiping cycle.
【0023】[0023]
【実施例1】1,3ープロパンジオールとジメチルテレ
フタレートから、定法により重合し極限粘度[η]0.
7のポリトリメチレンテレフタレートポリマーを得た。
このポリトリメチレンテレフタレートポリマーを紡口表
面温度253℃にて、直径0.35mmの孔36ホール
が同心円状に配列してある紡口を用い、吐出量23.1
g/分で押し出し、紡糸した。この時の単一孔を通過す
るポリマーの表面積は16900mm2 /分であった。
巻取を始める前にメチルフェニルシリコンを50重量
部、ジメチルシリコンを30重量部含有し、溶液粘度が
5000cpoiseのシリコン系離型剤を紡口口金面
に塗布した。押し出された糸条は、1600m/分で巻
き取り未延伸糸を得た。この時のワイピング周期は24
時間と良好であった。得られた未延伸糸を、ホットロー
ル55℃、ホットプレート140℃、延伸倍率2.6
倍、延伸速度800m/分で延伸を行い、50.5デニ
ール/36フィラメントの延伸糸を得た。得られた繊維
は、強度4.3g/d、伸度31%であった。結果を第
一表に示す。Example 1 Polymerization of 1,3-propanediol and dimethyl terephthalate by a conventional method was conducted to obtain an intrinsic viscosity [η] of 0.1.
As a result, polytrimethylene terephthalate polymer No. 7 was obtained.
This polytrimethylene terephthalate polymer was used at a spinning surface temperature of 253 ° C. using a spinning hole in which 36 holes having a diameter of 0.35 mm were arranged concentrically, and the discharge rate was 23.1.
Extruded at g / min and spun. At this time, the surface area of the polymer passing through the single hole was 16,900 mm 2 / min.
Before starting the winding, a silicone release agent containing 50 parts by weight of methylphenylsilicon and 30 parts by weight of dimethylsilicone and having a solution viscosity of 5000 cpoise was applied to the surface of the spinneret. The extruded yarn was wound at 1600 m / min to obtain an undrawn yarn. The wiping cycle at this time is 24
Time was good. The obtained undrawn yarn is subjected to hot roll 55 ° C., hot plate 140 ° C. and draw ratio 2.6.
The film was drawn at a draw speed of 800 m / min. To give a drawn yarn of 50.5 denier / 36 filaments. The obtained fiber had a strength of 4.3 g / d and an elongation of 31%. The results are shown in Table 1.
【0024】[0024]
【実施例2〜4、比較例1〜5】離型剤の種類、紡口表
面温度を変えた以外は実施例1と同様な方法で紡糸を行
った。離型剤は実施例1と同様のメチルフェニルシリコ
ンを50重量部、ジメチルシリコンを30重量部含有
し、溶液粘度が5000cpoiseのシリコン系離型
剤を用いた。本発明の範囲の紡糸条件では良好なワイピ
ング周期であった。一方、本発明の範囲から外れた紡糸
条件では不十分なワイピング周期、あるいは糸品質に問
題があった。結果を第一表に示す。Examples 2 to 4 and Comparative Examples 1 to 5 Spinning was carried out in the same manner as in Example 1 except that the type of the release agent and the spinning surface temperature were changed. As the release agent, a silicone release agent containing 50 parts by weight of methylphenyl silicon and 30 parts by weight of dimethyl silicon and having a solution viscosity of 5000 cpoise as in Example 1 was used. A good wiping cycle was obtained under spinning conditions within the range of the present invention. On the other hand, there was a problem with insufficient wiping cycle or yarn quality under spinning conditions outside the scope of the present invention. The results are shown in Table 1.
【0025】[0025]
【表1】 [Table 1]
【0026】[0026]
【実施例5、6、比較例6〜8】紡口径および吐出量を
変えた以外は、実施例1と同様な方法で紡糸を行った。
結果を第二表に示す。本発明の範囲の紡糸条件では良好
なワイピング周期であった。一方、本発明の範囲から外
れた紡糸条件では不十分なワイピング周期あるいは糸品
質に問題があった。Examples 5 and 6, Comparative Examples 6 to 8 Spinning was carried out in the same manner as in Example 1 except that the spinning diameter and the discharge amount were changed.
The results are shown in Table 2. A good wiping cycle was obtained under spinning conditions within the range of the present invention. On the other hand, there is a problem with insufficient wiping cycle or yarn quality under spinning conditions outside the scope of the present invention.
【0027】[0027]
【表2】 [Table 2]
【0028】[0028]
【発明の効果】本発明の紡糸方法により、従来行われて
いるポリトリメチレンテレフタレート紡糸方法の欠点を
改良し、ワイピング周期の延長が可能で、糸品質の良好
な糸を得ることができる。According to the spinning method of the present invention, the drawbacks of the conventional polytrimethylene terephthalate spinning method can be improved, the wiping cycle can be extended, and a yarn having good yarn quality can be obtained.
Claims (2)
り、且つメチルフェニルシリコンとジメチルシリコンと
を含有し、粘度が2000〜8000cpoiseであ
るシリコン系離型剤を紡口口金面に塗布することを特徴
とするポリトリメチレンテレフタレートの溶融紡糸方
法。1. A silicon-based mold release agent having a surface temperature of 230 to 280 ° C., containing methylphenyl silicon and dimethyl silicon, and having a viscosity of 2000 to 8000 cpoise, is applied to the surface of the spinneret. A method for melt-spinning polytrimethylene terephthalate.
積が5000〜30000mm2 /分であることを特徴
とする請求項1記載のポリトリメチレンテレフタレート
の溶融紡糸方法。2. The method according to claim 1, wherein the surface area of the polymer passing through a single hole of the spinneret is 5,000 to 30,000 mm 2 / min.
Priority Applications (1)
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JP36687297A JP3235982B2 (en) | 1997-12-26 | 1997-12-26 | Polyester spinning method |
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36687297A JP3235982B2 (en) | 1997-12-26 | 1997-12-26 | Polyester spinning method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11200143A true JPH11200143A (en) | 1999-07-27 |
JP3235982B2 JP3235982B2 (en) | 2001-12-04 |
Family
ID=18487901
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JP36687297A Expired - Fee Related JP3235982B2 (en) | 1997-12-26 | 1997-12-26 | Polyester spinning method |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6333106B2 (en) | 2000-03-03 | 2001-12-25 | E. I. Du Pont De Nemours And Company | Draw textured poly(trimethylene terephthalate) yarn |
US6383632B2 (en) | 2000-03-03 | 2002-05-07 | E. I. Du Pont De Nemours And Company | Fine denier yarn from poly (trimethylene terephthalate) |
JP2002371432A (en) * | 2001-06-08 | 2002-12-26 | Teijin Ltd | Method for spinning polytrimethylene terephthalate, and spinneret |
US6572967B1 (en) | 1999-09-30 | 2003-06-03 | Asahi Kasei Kabushiki Kaisha | Poly(trimethylene terephthalate) multifilament yarn |
US6620505B1 (en) | 1999-08-26 | 2003-09-16 | Asahi Kasei Kabushiki Kaisha | Poly(trimethylene terephthalate) modified cross-section yarn |
US6685859B2 (en) | 2000-03-03 | 2004-02-03 | E. I. Du Pont De Nemours And Company | Processes for making poly(trimethylene terephthalate) yarn |
-
1997
- 1997-12-26 JP JP36687297A patent/JP3235982B2/en not_active Expired - Fee Related
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6620505B1 (en) | 1999-08-26 | 2003-09-16 | Asahi Kasei Kabushiki Kaisha | Poly(trimethylene terephthalate) modified cross-section yarn |
US6572967B1 (en) | 1999-09-30 | 2003-06-03 | Asahi Kasei Kabushiki Kaisha | Poly(trimethylene terephthalate) multifilament yarn |
US6333106B2 (en) | 2000-03-03 | 2001-12-25 | E. I. Du Pont De Nemours And Company | Draw textured poly(trimethylene terephthalate) yarn |
US6383632B2 (en) | 2000-03-03 | 2002-05-07 | E. I. Du Pont De Nemours And Company | Fine denier yarn from poly (trimethylene terephthalate) |
US6663806B2 (en) | 2000-03-03 | 2003-12-16 | E. I. Du Pont De Nemours And Company | Processes for making poly (trimethylene terephthalate) yarns |
US6672047B2 (en) | 2000-03-03 | 2004-01-06 | E. I. Du Pont De Nemours And Company | Processes of preparing partially oriented and draw textured poly(trimethylene terephthalate) yarns |
US6685859B2 (en) | 2000-03-03 | 2004-02-03 | E. I. Du Pont De Nemours And Company | Processes for making poly(trimethylene terephthalate) yarn |
US6998079B2 (en) | 2000-03-03 | 2006-02-14 | E. I. Du Pont De Nemours And Company | Process of making partially oriented poly(trimethylene terephthalate) yarn |
JP2002371432A (en) * | 2001-06-08 | 2002-12-26 | Teijin Ltd | Method for spinning polytrimethylene terephthalate, and spinneret |
Also Published As
Publication number | Publication date |
---|---|
JP3235982B2 (en) | 2001-12-04 |
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