JPH0441713A - Production of superfine fiber composed of melt-anisotropic aromatic polyester - Google Patents
Production of superfine fiber composed of melt-anisotropic aromatic polyesterInfo
- Publication number
- JPH0441713A JPH0441713A JP14668290A JP14668290A JPH0441713A JP H0441713 A JPH0441713 A JP H0441713A JP 14668290 A JP14668290 A JP 14668290A JP 14668290 A JP14668290 A JP 14668290A JP H0441713 A JPH0441713 A JP H0441713A
- Authority
- JP
- Japan
- Prior art keywords
- melt
- aromatic polyester
- polyester
- anisotropic aromatic
- fiber
- 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.)
- Pending
Links
- 229920000728 polyester Polymers 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 title claims abstract description 23
- 125000003118 aryl group Chemical group 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000012670 alkaline solution Substances 0.000 claims abstract description 6
- 238000009987 spinning Methods 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 7
- 229920001410 Microfiber Polymers 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 208000012886 Vertigo Diseases 0.000 description 12
- 239000002131 composite material Substances 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- -1 polyethylene terephthalate Polymers 0.000 description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229920006237 degradable polymer Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012770 industrial material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XBNGYFFABRKICK-UHFFFAOYSA-N 2,3,4,5,6-pentafluorophenol Chemical compound OC1=C(F)C(F)=C(F)C(F)=C1F XBNGYFFABRKICK-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006081 fluorescent whitening agent Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- IZUPBVBPLAPZRR-UHFFFAOYSA-N pentachloro-phenol Natural products OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
- Artificial Filaments (AREA)
- Multicomponent Fibers (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、溶融異方性芳香族ポリエステルからなる極細
繊維の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing ultrafine fibers made of melt-anisotropic aromatic polyester.
溶融異方性を示す芳香族ポリエステルを紡糸して、優れ
た高強度・高弾性率の繊維が得られることは、特開昭５
４−７７６９１号公報、籍開平１−９２４０８号公報等
で公知であり、溶融異方性芳香族ポリエステルと他のポ
リマーを複合紡糸することＦｉ特開平１−２６７１９号
公報、％開平１−３１８３５号公報、特開平２−８０６
４０号公報等で公知である。The fact that fibers with excellent high strength and high modulus of elasticity can be obtained by spinning aromatic polyester exhibiting melt anisotropy was disclosed in JP-A No. 5
4-77691, Japanese Patent Publication No. 1-92408, etc., and it is known that composite spinning of melt anisotropic aromatic polyester and other polymers is carried out in Japanese Patent Application Publication No. 1-26719, Japanese Patent Application Publication No. 1-31835. Publication, JP-A-2-806
It is publicly known from Publication No. 40 and the like.
また、ポリエチレンテレフタレートとアルカリ易分解性
ポリエステルとを複合紡糸して分割型複合繊維を得、該
繊維をアルカリ処理して極細繊維に分割することは％開
昭５４−１３８６２０号公報等で公知である。Furthermore, it is known in Japanese Patent Publication No. 138620/1983 to obtain splittable composite fibers by composite spinning polyethylene terephthalate and alkali-ready polyester, and to divide the fibers into ultrafine fibers by treating them with alkali. .
ｃ本発明が解決しようとする課題〕
今日まで、溶融異方性ポリマーは紡糸ノズルを通過する
時の剪断力により著しく配向するため、いわゆる紡糸ド
ラフトをあまり大きくすることが出きす、加えて延伸を
することが実質的に不可能である。このため単繊維デニ
ールの小さいもの（％に、３デニール以下）を操業的に
安定に製造することは出来なかった。c) Problems to be Solved by the Present Invention Until now, molten anisotropic polymers have been significantly oriented by the shear force when passing through a spinning nozzle, making it possible to make the so-called spinning draft too large, and in addition, it has been difficult to draw It is virtually impossible to do so. For this reason, single fibers with a small denier (3 denier or less) could not be stably produced operationally.
本発明は、細デニール、特に３デニール以下の高強度芳
香族ポリエステル＊維を提供するにある。The present invention provides a high-strength aromatic polyester* fiber having a fine denier, particularly 3 denier or less.
不発明に溶融異方性芳香族ポリエステルが、アルカリ易
分解性ボ１ノエステルによって、少なくとも２個のセグ
メントに分割された複合繊維を紡糸し、該複合繊維をア
ルカリ性溶液で処理し、アルカリ易分解性ポリエステル
を除去し、各セグメントに分割した後、各セグメントを
該セグメントを構成する溶融異方性芳香族ポリエステル
の（融点−８０℃）以上融点以下の温度で熱処理し、強
度を３０％以上増加させることを特徴とする溶融異方性
芳香族ポリエステル繊維からなる極細繊維の裏道方法で
ある。Inventively, a conjugate fiber in which a melting anisotropic aromatic polyester is divided into at least two segments by an alkali easily decomposable bonoester is spun, and the conjugate fiber is treated with an alkaline solution to form an alkali easily decomposable polyester. After removing the polyester and dividing into each segment, each segment is heat treated at a temperature above (melting point -80°C) and below the melting point of the melting anisotropic aromatic polyester constituting the segment to increase the strength by 30% or more. This is a method for producing ultrafine fibers made of melt anisotropic aromatic polyester fibers.
不発明に言う溶融異方性芳香族ポリエステルの好ましい
例は、下記■〜■に示す反復成分の組合せからなるもの
である。Preferred examples of the melt anisotropic aromatic polyester referred to in the invention are those consisting of a combination of repeating components shown in (1) to (4) below.
〔ここでＸおよびＹｑＨｌｄ、Ｂｒ又１ｊＣＨ３Ｔあり
、
Ｚは舎、−＠−０−＠−１Ωこ
これらに、２０重量％以下の他の共重合成分あるいは、
通常便用される添加剤（＃ｉ料、カーボン。[Here, X and YqHld, Br or 1jCH3T are present, Z is sha, -@-0-@-1Ω, and other copolymer components of up to 20% by weight or,
Additives commonly used (#i additives, carbon.
熱安定剤、紫外線吸収剤、滑剤、螢光増白剤）等が含着
れていてもよい。A heat stabilizer, an ultraviolet absorber, a lubricant, a fluorescent whitening agent, etc. may be included.
本発明の効果が最も顕著に発揮されるのに１本質的に下
記［：ｌＬ ［ｆｆｌの反復１１１ｅ、単位から成る
部分が８０１ｉ％以上であるポリマー ｔＰ＃に［（Ｉ
ｔの成分が３〜４５係である芳香族ポリエステルであ本
発明に言う溶融異方性とは、溶融相において光学的異方
性を示すものである。このような特性／′ｉ、公知の方
法、例えば、ホットステージにのせ九試料を窒素雰囲気
下で昇温加熱し、その透過光を観察することにより容易
に認足することが出来る０
溶融異方性を示す芳香族ポリエステルは、ノズルを通過
するときの剪断速度が１０３〜１０５ｓｅｃｌ とな
ると著しい分子配向が生じ、延伸しなくとも優れ走置強
度・高弾性率の繊維となる。In order for the effects of the present invention to be most conspicuous, 1 essentially the following [:lL[ffl repetition 111e, polymer tP# in which the portion consisting of units is 801i% or more [(I
The melt anisotropy referred to in the present invention in the aromatic polyester in which the component t is 3 to 45 indicates optical anisotropy in the melt phase. Such characteristics can be easily recognized by known methods such as heating a sample on a hot stage in a nitrogen atmosphere and observing the transmitted light.0 Melting anisotropy When the shearing rate of the aromatic polyester when passing through a nozzle is 10 3 to 10 5 sec, remarkable molecular orientation occurs in the aromatic polyester, which exhibits excellent running strength and high elastic modulus even without stretching.
本発明に言う剪断速度ンとは、円型ノズルの場合は次式
により求められる。In the case of a circular nozzle, the shear rate referred to in the present invention is determined by the following equation.
但し、ｒ：ノズル孔の半径（副）
Ｑ：単孔当りのポリマー吐出量（ｍ／５ｅｃ）本発明に
言うアルカリ易分解性ポリエステルとは、ポリアルキレ
ングリコール共重合ポリエチレンテレフタレート、イン
フタレート共重合ポリエチレンテレフタレート、５−ソ
ジウムスルホイソフタレート共重合ポリエチレンテレフ
タレート等であり、これらは混合して用いても良い。最
も好ましい例に、５−ソジュウムスルホイソ７タレート
を１〜５モルチ共重合したポリエチレンテレフタレート
である。However, r: Radius of nozzle hole (minor) Q: Polymer discharge amount per single hole (m/5ec) The alkali easily degradable polyester referred to in the present invention refers to polyalkylene glycol copolymerized polyethylene terephthalate, inphthalate copolymerized polyethylene terephthalate, 5-sodium sulfoisophthalate copolymerized polyethylene terephthalate, etc., and these may be used in combination. The most preferred example is polyethylene terephthalate obtained by copolymerizing 1 to 5 moles of 5-sodium sulfoiiso7thaleate.
特に前記［１］、（１１３を主成分とする溶融異方性ポ
リエステルと、５−ソジュウムスルホイソフタレートを
１〜５モル憂共重合したポリエチレンテレフタレートで
複合紡糸した場合に最も有効に行なわれる。即ち、複合
紡糸がスムーズに行なわれ、２成分のアルカリ分解層が
１０倍以上異なるため、アルカリ性溶液による処理が、
工業的に短時間で行う事が出来る。かつ易分解成分をほ
ぼ完全に線除去できるので、次の熱処理工程で融着等の
トラブルの発生が生じない。In particular, it is most effective when composite spinning is performed using a melt anisotropic polyester containing the above-mentioned [1] (113) as a main component and polyethylene terephthalate copolymerized with 1 to 5 moles of 5-sodium sulfoisophthalate. In other words, composite spinning is carried out smoothly, and the alkaline decomposition layers of the two components differ by more than 10 times, so treatment with an alkaline solution
It can be done industrially in a short time. In addition, since easily decomposable components can be almost completely removed, troubles such as fusion will not occur in the next heat treatment step.
本発明の主目的は、高強度の極細繊維（％に３デニール
以下の繊維）を得ることであり、そのためＫは、溶融異
方性ポリエステルをアルカリ易分解性ポリエステルによ
って少なくとも２個のセグメン）Ｋ分割された形態で複
合紡糸する必要がある。先にも述べたように溶融異方性
ポリエステルは、ノズル通過時に著しい分子配向が生じ
るため、その後の延伸（いわゆる紡糸ドラフト）をめま
り大きくとることが出来ない。良好紡糸調子を得るには
、ドラフトは１０〜４０倍である。このため紡糸原糸の
段階では、５〜１０デニールより小さいものは得られ難
い。そのため、本発明の目的としている３デニール以下
の極細糸を得るＫは、２ヶ以上のセグメントに分割して
おく必要がある○好ましくは、４〜１０個である。易分
解性成分の占める割合いは、少ない方が好ましいが、セ
グメントに分割を完全にする必要上、全繊維に対して１
０〜５０重量％とすることが適当である。The main objective of the present invention is to obtain high-strength ultrafine fibers (fibers with a denier of less than 3 denier in %), for which K is a melt-anisotropic polyester with at least two segments (K It is necessary to perform composite spinning in a divided form. As mentioned above, melt anisotropic polyester undergoes significant molecular orientation when passing through a nozzle, so it is impossible to draw it afterward (so-called spinning draft) to a large extent. To obtain good spinning condition, the draft is 10 to 40 times. For this reason, it is difficult to obtain yarns smaller than 5 to 10 deniers at the spinning stage. Therefore, K to obtain the ultrafine yarn of 3 deniers or less, which is the object of the present invention, requires dividing into two or more segments. Preferably, the number is 4 to 10. It is preferable that the proportion of easily degradable components be small, but because it is necessary to completely divide the fibers into segments, it is necessary to
A suitable range is 0 to 50% by weight.
本発明の複合形態の横断面例の概略図を第１図に示す。A schematic diagram of a cross-sectional example of a composite form of the present invention is shown in FIG.
本発明に言うアルカリ溶液での処理とに、水酸化ナトリ
ウム、水酸化カリウム等を主成分とする処理液であり、
緩衝剤や分解促進剤等を含んでいてもよい。また処理法
としては、浸漬法、デイツプニップ法、ローラーバット
法いずれも可能であるＯ
繊維の形態としては、フィラメント、ステープル、ある
いは織物、編物、不織布等で行うこともできる。In the treatment with an alkaline solution referred to in the present invention, a treatment liquid containing sodium hydroxide, potassium hydroxide, etc. as a main component,
It may also contain a buffer, a decomposition accelerator, and the like. Further, as a treatment method, any of a dipping method, a dip nip method, and a roller butt method are possible.As for the form of the fiber, filament, staple, woven fabric, knitted fabric, nonwoven fabric, etc. can also be used.
分割処理後、中和、水洗、乾燥処理が行なわれるのが普
通である。After the division process, neutralization, washing with water, and drying processes are usually performed.
熱処理は、該溶融異方性ポリエステルの融点をＴｍ（℃
）とするとき、−以下（Ｔｒｒｉ−８０℃）以上の温度
で行なわれる。Ｔｍは、一般Ｖこ熱処理につれて上昇す
るので、処理温Ｉｆは順次上昇していく温度パターンが
好ましい。The heat treatment lowers the melting point of the melt anisotropic polyester to Tm (℃
), it is carried out at a temperature of - or lower (Trri-80°C) or higher. Since Tm generally increases with heat treatment, a temperature pattern in which the treatment temperature If increases sequentially is preferable.
該熱処理としては、窒素等の不活性ガスや、真空中ある
いは空気の如き酸素含有の活性ガス雰囲気で行うことが
出来る。この熱処理にエリ分割された各セグメントの強
度を３０％以上増大させることが出来る。本発明で得ら
れる極細繊維は衣料用、産業資材用途において広く使用
される。衣料用途としては、各種作業服、スポーツ衣料
、防護衣料、また産業資材用としては、高温用あるいに
耐薬品用のワイピングクロス、各種テン７ヨンメンバー
コート類、フィルター マット、テント類等に使用て
れる。The heat treatment can be performed in an inert gas such as nitrogen, in a vacuum, or in an oxygen-containing active gas atmosphere such as air. This heat treatment can increase the strength of each segment by 30% or more. The ultrafine fibers obtained by the present invention are widely used in clothing and industrial material applications. Clothing applications include various work clothes, sports clothing, and protective clothing.As for industrial materials, it is used for high temperature and chemical resistant wiping cloths, various ten-member coats, filter mats, tents, etc. I can see it.
以下、実施例により本発明をエフ具体的に説明するが、
本発明は、これらの実施例により＠定されるものではな
い。Hereinafter, the present invention will be specifically explained with reference to Examples.
The present invention is not limited to these Examples.
実施例１
構成単位〔Ｉ〕と〔■〕が７．３：２．７である溶融異
方性芳香族ポリエステルポリマーを作成した。このポリ
マーの性質は
η１ｎｈ−５，７ｄｚ／ｆ
Ｔｍ＝２８０℃
テアツタ。ηｉｎｈの測定は試料をペンタフルオロフェ
ノールに０．１重１％溶解しく６０〜８０℃）。Example 1 A melt anisotropic aromatic polyester polymer in which the structural units [I] and [■] were in a ratio of 7.3:2.7 was prepared. The properties of this polymer are η1nh-5,7dz/f Tm=280°C. To measure ηinh, dissolve the sample in pentafluorophenol at 0.1% by weight (60-80°C).
６０℃の恒温槽中で、ウソベローデ型粘度計で測定する
。Measurement is performed using an Usoberohde viscometer in a constant temperature bath at 60°C.
−の測定は、示差走査熱量計（メトラー社ｇＤＳＣ）で
行い観察される主吸熱のピーク温度を而と足めた。- was measured using a differential scanning calorimeter (Mettler gDSC) and the observed peak temperature of the main endotherm was added.
易分解性ポリエステルとして５−ソジュウムスルホイソ
フタレートを３モル％某重合したポリエチレンテレフタ
レートを用いた。As the easily decomposable polyester, polyethylene terephthalate obtained by polymerizing 3 mol% of 5-sodium sulfoisophthalate was used.
この嶌のの固有粘度〔η〕は０．４８ ｄ４／ｆであっ
た。The intrinsic viscosity [η] of this product was 0.48 d4/f.
〔η〕の測定は、フェノールとテトラクロルエタンの等
量混合溶媒を用い３０℃の恒温槽中で測定した０
各ポリマーを２台の押出機より溶融し、ギヤポンプから
７：３の重量割合（溶融異方性ポリマーニア、易分解性
ポリマー：３）で紡糸ヘッドに導き、第１図（Ｃ）の断
面形状を有する１５０ｄ／１５ｆのマルチフィラメント
を紡糸した０
この本のを穴のめいたステンレス製ボビンに巻き、
５ ％ ＮａＯＨ水溶液に浸し、９０℃で４０分間処理
した。[η] was measured using a mixed solvent of equal amounts of phenol and tetrachloroethane in a constant temperature bath at 30°C. Each polymer was melted using two extruders, and a weight ratio of 7:3 was measured using a gear pump. A 150d/15f multifilament with a cross-sectional shape shown in Figure 1 (C) was spun by guiding it to the spinning head using a melting anisotropic polymer (3), an easily degradable polymer. Wind it on a made bobbin,
It was immersed in a 5% NaOH aqueous solution and treated at 90°C for 40 minutes.
この処理による重量減少は３１チであり、易分解性ポリ
マーは、はぼ完全に除却され、各フィラメントＦｉ、６
個に分割されていた０このものをリン酸液で中和し、熱
湯で十分洗浄した後乾燥した。The weight loss due to this treatment was 31 inches, the easily degradable polymer was almost completely removed, and each filament Fi, 6
This material, which had been divided into pieces, was neutralized with a phosphoric acid solution, thoroughly washed with boiling water, and then dried.
このもののヤーン強度ｆｌ、 ９．１ ｒ／ｄ″′Ｃあ
つ九。The yarn strength of this material is fl, 9.1 r/d'''C.
また単糸の繊度は０．３〜１．８デニールであり平均は
０．８６デニールであった。Further, the fineness of the single yarn was 0.3 to 1.8 denier, and the average was 0.86 denier.
このボビンを熱風炉（ボビンの内側よジ糸層を通り外部
に抜ける）に入れ、２６０℃で１時間、２７０℃で２時
間、２７０℃から２８５℃に上昇しながら５時間処理し
た。処理気体は露点が一７０℃の除湿空気を用いた。This bobbin was placed in a hot air oven (passing through the inner weft layer of the bobbin to the outside) and treated at 260°C for 1 hour, at 270°C for 2 hours, and for 5 hours while increasing from 270°C to 285°C. Dehumidified air with a dew point of 170° C. was used as the processing gas.
このものは、膠着等のトラブルは全くなく、通常の紙管
に巻返すことが出きた０ヤ一／強度は２４ ｆ／ｄ Ｔ
アｆｆ、強ｆｌｌＦ１１６３ ＊ ％増大した。This product had no problems such as sticking and could be rewound into a normal paper tube.The strength was 24 f/d T.
Aff, strongly increased by F1163*%.
第１図は本発明の分割前の複合繊維の断面の例である。 特徴出願人 株式会社 り ラ し FIG. 1 is an example of a cross section of the composite fiber of the present invention before division. Characteristics Applicant: RiRashi Co., Ltd.
Claims (1)
リエステルによつて、少なくとも２個のセグメントに分
割された複合繊維を紡糸し、該複合繊維をアルカリ性溶
液で処理し、アルカリ易分解性ポリエステルを除去し各
セグメントに分割した後、各セグメントを該セグメント
を構成する溶融異方性芳香族ポリエステルの（融点−８
０℃）以上融点以下の温度で熱処理し、強度を３０％以
上増加させることを特徴とする溶融異方性芳香族ポリエ
ステル繊維からなる極細繊維の製造方法。Spinning a conjugate fiber in which the melt anisotropic aromatic polyester is divided into at least two segments by the alkali easily decomposable polyester, and the conjugate fiber is treated with an alkaline solution to remove the alkali easily decomposable polyester. After dividing into each segment, each segment is divided into (melting point -8
1. A method for producing ultrafine fibers made of melt-anisotropic aromatic polyester fibers, characterized in that the fibers are heat-treated at temperatures above 0° C.) and below their melting point to increase their strength by 30% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14668290A JPH0441713A (en) | 1990-06-04 | 1990-06-04 | Production of superfine fiber composed of melt-anisotropic aromatic polyester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14668290A JPH0441713A (en) | 1990-06-04 | 1990-06-04 | Production of superfine fiber composed of melt-anisotropic aromatic polyester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0441713A true JPH0441713A (en) | 1992-02-12 |
Family
ID=15413206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14668290A Pending JPH0441713A (en) | 1990-06-04 | 1990-06-04 | Production of superfine fiber composed of melt-anisotropic aromatic polyester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07316926A (en) * | 1994-05-19 | 1995-12-05 | Kuraray Co Ltd | Sheath-core type conjugate yarn, coated yarn and its production |
| JP2008214842A (en) * | 2007-02-07 | 2008-09-18 | Toray Ind Inc | Method for producing liquid crystal polyester fiber |
-
1990
- 1990-06-04 JP JP14668290A patent/JPH0441713A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07316926A (en) * | 1994-05-19 | 1995-12-05 | Kuraray Co Ltd | Sheath-core type conjugate yarn, coated yarn and its production |
| JP2008214842A (en) * | 2007-02-07 | 2008-09-18 | Toray Ind Inc | Method for producing liquid crystal polyester fiber |
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