JPH0291206A - Dry-wet spinning process - Google Patents
Dry-wet spinning processInfo
- Publication number
- JPH0291206A JPH0291206A JP24362888A JP24362888A JPH0291206A JP H0291206 A JPH0291206 A JP H0291206A JP 24362888 A JP24362888 A JP 24362888A JP 24362888 A JP24362888 A JP 24362888A JP H0291206 A JPH0291206 A JP H0291206A
- Authority
- JP
- Japan
- Prior art keywords
- spinning
- yarn
- bath
- spinneret
- guide
- 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
- 238000001891 gel spinning Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 34
- 238000005345 coagulation Methods 0.000 claims abstract description 29
- 230000015271 coagulation Effects 0.000 claims abstract description 29
- 239000000835 fiber Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 8
- 238000000578 dry spinning Methods 0.000 claims description 2
- 238000009987 spinning Methods 0.000 abstract description 33
- 230000001112 coagulating effect Effects 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 9
- 229920006243 acrylic copolymer Polymers 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 6
- 238000002166 wet spinning Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229920002972 Acrylic fiber Polymers 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- -1 chrome plating Chemical class 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JUWSSMXCCAMYGX-UHFFFAOYSA-N gold platinum Chemical compound [Pt].[Au] JUWSSMXCCAMYGX-UHFFFAOYSA-N 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野コ
本発明は乾湿式紡糸方法、特にアクリル系繊維の静置浴
乾湿式紡糸方法において多ホール化、多糸条化に有利な
紡糸方法に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a dry-wet spinning method, particularly a spinning method that is advantageous for forming multiple holes and multiple threads in a static bath dry-wet spinning method for acrylic fibers. It is.
より詳しくは、乾湿式紡糸を行うに際して、凝固浴での
糸条の走行安定性を増すことにより、特に総フィラメン
ト数が多い糸条を安定に紡糸する方法に関する。More specifically, the present invention relates to a method for stably spinning a yarn having a large total number of filaments by increasing the running stability of the yarn in a coagulation bath during dry-wet spinning.
また本発明は、総フィラメント数が比較的少ない複数の
マルチフィラメント糸条な凝固浴中て混繊なく紡糸し、
かつ均一な性状を備えた糸条を得ることを可能とする紡
糸方法に関するものである。In addition, the present invention involves spinning a plurality of multifilament yarns with a relatively small total number of filaments in a coagulation bath without mixing fibers,
The present invention also relates to a spinning method that makes it possible to obtain yarn with uniform properties.
[従来の技術]
加熱溶融しないポリマや極めて重合度の高いポリマを紡
糸して繊維化する方法として、湿式紡糸法が採用される
。この湿式紡糸法の1変形としていわゆる乾湿式紡糸法
がある。これは口金から吐出されたポリマを一旦気体中
に走行させた後、直ちに凝固液中に導入し凝固させる方
法であるが、単なる湿式紡糸と異なる点として、該気体
部分にドラフトが局在化する結果により、高速あるいは
高ドラフトでの紡糸が可能である特徴があり、アクリル
系繊維の紡糸、特にフィラメント数の比較的少ない衣料
用フィラメントや炭素wc維用プリカーサの紡糸などに
使用される。[Prior Art] A wet spinning method is employed as a method for spinning a polymer that does not melt by heating or a polymer with an extremely high degree of polymerization into fibers. A variation of this wet spinning method is the so-called dry-wet spinning method. This is a method in which the polymer discharged from the spinneret travels through the gas and then is immediately introduced into the coagulating liquid to coagulate. However, the difference from simple wet spinning is that drafts are localized in the gas part. As a result, it has the characteristic of being capable of spinning at high speed or high draft, and is used for spinning acrylic fibers, particularly for spinning clothing filaments with a relatively small number of filaments and precursors for carbon WC textiles.
乾湿式紡糸方法には、流下浴方式と静置浴方式がある。The dry-wet spinning method includes a falling bath method and a standing bath method.
流下浴方式とは、フィラメント数が比較的少ないポリマ
の紡糸生産性を向上させるために、浴液を流下させなが
ら紡糸する紡糸方式である。The falling bath method is a spinning method in which fibers are spun while a bath liquid is flowing down, in order to improve the spinning productivity of polymers having a relatively small number of filaments.
一方静置浴方式とは、通常垂直方向に走行する凝固糸条
をガイドを用いて方向転換させて引き取り、凝固浴液か
ら分離させながら凝固浴の上方に引き取る紡糸方法を指
し、特別の工夫なしでも凝固浴随伴液を効率よく分離さ
せることが出来るため、特に比較的フィラメント数が多
く低速で紡糸を行う場合などに広〈実施されている。On the other hand, the static bath method refers to a spinning method in which the coagulated filament, which normally runs in the vertical direction, is diverted using a guide and taken up, separated from the coagulation bath liquid and taken above the coagulation bath, and does not involve any special measures. However, since the liquid accompanying the coagulation bath can be efficiently separated, it is widely used, especially when the number of filaments is relatively large and spinning is performed at low speed.
このような乾湿式紡糸においてフィラメント数が少ない
糸条の場合は、湿式紡糸法に比べて高速化のメリットを
生かして高生産性が発揮される。In the case of a yarn with a small number of filaments in such dry-wet spinning, high productivity can be achieved by making use of the advantage of higher speed compared to wet spinning.
しかしこの方法は湿式紡糸法に比べ紡糸張力が低い傾向
にあるため、フィラメント数が多いものについては、単
糸の融着を防ぐ目的で口金の孔間隔を大きくとる必要か
ら装置が大型化したり、凝固液の随伴流による糸条の乱
れが著しくなり、生産性が低下する問題点があった。However, this method tends to have lower spinning tension than the wet spinning method, so for products with a large number of filaments, it is necessary to increase the spacing between the holes in the nozzle to prevent single yarns from fusing, resulting in larger equipment. There was a problem in that the flow of the coagulating liquid caused significant disturbance of the yarn, resulting in a decrease in productivity.
これらを改良したものとして以下の技術が公知である。The following techniques are known as improved versions of these techniques.
例えばUSP4702876号公報には、ポリアミドフ
ィラメントの流下浴乾湿式紡糸の際に1つの口金から多
数本の糸条を紡糸することが知られている。しかし流下
浴によるものは、開閉装置等を備えた流管との朝合せが
必須であるため、装置的に複雑となる。For example, in US Pat. No. 4,702,876, it is known that a large number of threads are spun from one spinneret during falling bath dry-wet spinning of polyamide filaments. However, in the case of a flowing bath, it is necessary to connect the flow tube with an opening/closing device, etc., which makes the device complicated.
静置浴乾湿式法に於て紡糸糸条の乱れを防ぐ目的で、浴
中のガイドにベルトを掛は回転するようにし、随伴する
液流の影響により発生する単糸の巻き付きなどのトラブ
ルを防止するという構成の考案がある(実開昭54−9
3514号公報)。In order to prevent the spun yarn from being disturbed in the static bath dry-wet method, a belt is hung around the guide in the bath and rotates to prevent problems such as the winding of single yarns caused by the accompanying liquid flow. There is a devised structure to prevent the
Publication No. 3514).
また浴液を制御して糸条の乱れを防ぐという発明も公知
である(特開昭60−39406号公報)。There is also a known invention in which the bath liquid is controlled to prevent yarn disturbance (Japanese Unexamined Patent Publication No. 60-39406).
しかしこれらの考案、発明では装置が複雑化する問題点
があった。However, these ideas and inventions had the problem of complicating the device.
紡糸口金の改良について検討した例が特開昭63−85
103号公報に見られる。この発明では口金の吐出面の
みに紡糸性良好な材質を使用した構造始口金に関する。An example of studying the improvement of spinnerets is JP-A-63-85.
Seen in Publication No. 103. The present invention relates to a starting nozzle having a structure in which a material with good spinnability is used only on the ejection surface of the nozzle.
また特公昭62−61684号公報の発明では溶融紡糸
の生産性を上げるため一つの口金の座ぐり孔に複数の吐
出孔を開設している。しかし、この様な口金は凝固液面
と口金の間隔が約10mm以下である乾湿式紡糸にその
まま適用しても、糸条の接着や浴液の乱れが生じる問題
点があった。Furthermore, in the invention disclosed in Japanese Patent Publication No. 62-61684, a plurality of discharge holes are provided in the counterbore of one spinneret in order to increase the productivity of melt spinning. However, even if such a spinneret is directly applied to dry-wet spinning where the distance between the coagulating liquid level and the spinneret is about 10 mm or less, there are problems in that the yarns stick together and the bath liquid is disturbed.
[発明が解決しようとする課題]
従来の静置浴乾湿式紡糸方法においては、特にフィラメ
ント数が多い糸条を紡糸したり、比較的フィラメント数
の多い糸条と少ない糸条を同一の装置を用いて紡糸する
ときは、生産性および糸条品位が低下する問題点があっ
た。[Problems to be Solved by the Invention] In the conventional static bath dry-wet spinning method, it is difficult to spin yarn with a particularly large number of filaments, or to spin yarn with a relatively large number of filaments and yarn with a relatively small number of filaments using the same device. When spinning using this method, there was a problem that productivity and yarn quality decreased.
特にフィラメント数が多い糸条を高速で紡糸する際は、
凝固浴中で糸条が混繊したり、糸条走行方向変更ガイド
前後において分繊状態の安定性が低下し、紡糸延伸工程
での毛羽や糸切れの発生のために、高速による紡糸が不
可能となって生産性が低下せざるをえず、また品位も低
下し、必要に応じて複数本に分繊することも不可能であ
った。Especially when spinning yarn with a large number of filaments at high speed,
Spinning at high speeds is not possible due to mixing of yarns in the coagulation bath, decreased stability of the fiber splitting state before and after the yarn running direction change guide, and generation of fuzz and yarn breakage in the spinning and drawing process. As a result, productivity had to decline, quality also deteriorated, and it was impossible to separate the fibers into multiple fibers if necessary.
本発明の課題は比較的簡単な装置を用いて、乾湿式紡糸
の生産性を向上させることにある。とくに静置浴乾湿式
紡糸方法において、高速多糸条時の糸条の走行安定性を
向上させることにより、設備生産性を従来になく高める
ことにある。An object of the present invention is to improve the productivity of wet-dry spinning using a relatively simple device. In particular, in the static bath dry-wet spinning method, the purpose is to improve the running stability of the yarn during high-speed multi-filament spinning, thereby increasing equipment productivity to an unprecedented degree.
[課題を解決するための手段]
上述の課題は、静置浴乾湿式紡糸方法において、口金の
孔を2ヶ以上にブロック化して配し、1つのブロックと
他のブロックの間隔を2a以上とするとともに、口金の
ほぼ直下の凝固浴中に、lまたはそれ以上の、突起部分
の高さが5mm以上である分繊用の突起を有する固定式
凝固浴中ガイドを設け、ブロック単位に複数のマルチフ
ィラメントを垂直方向に紡糸し、固定ガイドの突起間に
分繊したのち、引き取ることを特徴とする乾湿式紡糸方
法によって達成することが出来る。[Means for solving the problem] The above-mentioned problem is solved by arranging the holes of the nozzle in two or more blocks in the static bath dry-wet spinning method, and setting the interval between one block and the other block to be 2a or more. At the same time, a fixed coagulation bath guide having 1 or more protrusions for fiber splitting with a protrusion height of 5 mm or more is installed in the coagulation bath almost directly under the nozzle, and a plurality of guides are installed in each block. This can be achieved by a dry-wet spinning method characterized by spinning multifilaments in the vertical direction, splitting the fibers between the protrusions of a fixed guide, and then taking them off.
ここでaは口金端部における口金と凝固浴液面との距離
である。Here, a is the distance between the cap and the coagulation bath liquid level at the end of the cap.
aは用いるポリマ、紡糸条件によって変化するが、通常
1〜20mm、好ましくは2〜10mmに設定される。Although a varies depending on the polymer used and spinning conditions, it is usually set to 1 to 20 mm, preferably 2 to 10 mm.
本発明の口金孔をブロック化した時のブロック間の間隔
は、用いるポリマ、紡糸条件によって最適値が変化する
が、とくに口金と凝固液面の距離aの影響を最も大きく
受け、2a未満であれば、ブロック化された*$itと
繊維が絡み合いを生じ分繊が不可能となり、また60m
mを超えると口金全体が大きくなり設備生産性が低下し
て好ましくなく、2a以上、好ましくは3a以上60m
m以下とする。The optimum distance between the blocks when the nozzle holes of the present invention are formed into blocks varies depending on the polymer used and the spinning conditions, but it is most affected by the distance a between the nozzle and the coagulating liquid level, and even if it is less than 2a. In this case, the blocked *$it and the fibers become entangled, making it impossible to separate the fibers, and the length of 60 m
If it exceeds m, the entire mouthpiece becomes large and equipment productivity decreases, which is undesirable.
m or less.
1つのブロック単位の孔の個数は、要求される繊度によ
り異なるが、300H以上、好ましくは500H以上で
3000H以下が良好な結果を与える。ブロック内の孔
相互の間隔は3mm以内、望ましくは2mm以内0.5
mm以上に設計される。口金の孔間隔が小さくなり過ぎ
ると高速紡糸時に凝固の随伴流が増加することにより、
ブロック中央部分の液面が下がり紡糸性が低下する傾向
にある。また過大に過ぎると口金の外周部分の糸条の集
束角度が大きくなり過ぎ、やはり可紡性が低下し易くな
る。The number of holes in one block unit varies depending on the required fineness, but a value of 300H or more, preferably 500H or more and 3000H or less gives good results. The distance between the holes in the block is within 3 mm, preferably within 2 mm.0.5
Designed to be larger than mm. If the hole spacing of the spinneret becomes too small, the accompanying flow of coagulation will increase during high-speed spinning.
The liquid level in the center of the block tends to drop and the spinnability tends to decrease. On the other hand, if it is too large, the convergence angle of the yarn at the outer peripheral portion of the spinneret becomes too large, which tends to reduce spinnability.
ブロックの形状は、−例として長方形、正方形、円形、
楕円形あるいはそれらを組み合わせた形状があり、口金
全体とブロック間隔の形状によって決定される。具体的
には、長方形のブロックを配してその開に幅2a以上の
溝形状の非穿孔帯を設けたもの、一つのブロックを円形
、楕円形に配したものがあり、特に円形単位のブロック
を複数個配し、最も近接したホール間隔が2a以上とし
たものがより好ましい。The shape of the blocks can be - e.g. rectangular, square, circular,
It can be oval or a combination of these shapes, and is determined by the overall shape of the cap and the block spacing. Specifically, there are rectangular blocks arranged and a groove-shaped non-perforated zone with a width of 2 a or more provided at the opening, and one block arranged in a circular or oval shape, especially blocks in circular units. It is more preferable that a plurality of holes are arranged and the distance between the closest holes is 2a or more.
本発明に使用する口金は、乾湿式紡糸の溶媒耐蝕性の観
点から、少なくともその表面材質が金−白金合金、タン
タル、ハステロイや、オーステナイト系、オーステナイ
ト−フェライト系、析出硬化系等の耐食性ステンレス鋼
などからなることが好ましい。これらの口金は紡糸開始
を容易にするため、ポリマとの離型性がよい材質を適用
し、更にフッソ系や、シリコン系の離型剤をコーティン
グしたり、塗布したりするのもより好ましい。From the viewpoint of solvent corrosion resistance in dry-wet spinning, the spinnerets used in the present invention are made of corrosion-resistant stainless steel such as gold-platinum alloy, tantalum, hastelloy, austenitic, austenite-ferrite, or precipitation-hardened stainless steel. It is preferable to consist of the following. In order to facilitate the start of spinning, these spinnerets are preferably made of a material that has good mold release properties from the polymer, and are further preferably coated with a fluorine-based or silicone-based mold release agent.
なお口金表面に離型性、耐蝕性の良好な材質な使用し、
基材として機械強度の優れた、安価な材質を選択し、そ
れらをコーティングや貼合わせなどの手段によって複合
した口金を形成してもよい。In addition, a material with good mold releasability and corrosion resistance is used on the surface of the cap.
An inexpensive material with excellent mechanical strength may be selected as the base material, and a composite cap may be formed by coating, laminating, or other means.
口金と組み合わせて用いる凝固ガイドは、はぼ口金の鉛
直下に設置され、口金のブロックに応じた分繊用の突起
を設けることが必要である。この場合、突起の高さを5
mm以上、好ましくは10mm以上で30mm以下とす
ることに特徴がある。The coagulation guide used in combination with the spinneret is installed vertically below the spinneret, and needs to be provided with protrusions for fiber separation that correspond to the blocks of the spinneret. In this case, the height of the protrusion is set to 5
It is characterized by being at least 10 mm, preferably at least 10 mm and at most 30 mm.
凝固ガイドの突起物の高さが5mm以下になると分線性
が低下し、また突起の高さが30mm以上になると凝固
液流の乱れが過大となり、かえって紡糸性が低下する。If the height of the protrusions of the coagulation guide is less than 5 mm, the line separation property will be reduced, and if the height of the protrusions is more than 30 mm, the turbulence of the coagulating liquid flow will be excessive, and the spinnability will be reduced.
本発明のガイドは回転可能な構造にすると分繊性が悪化
するため、固定されたものである必要がある。If the guide of the present invention has a rotatable structure, the splitting properties will deteriorate, so it needs to be fixed.
また本ガイドは糸条を集束させる効果を持つものが好ま
しい。−例としてガイドの直径は分繊用の突起間の中央
部分の径を10mm以下、両端面の部分の直径が60m
m以下の回転円体ユニットを分繊用の突起でつなぎ合わ
せた棒状構造とする。Further, it is preferable that the guide has the effect of converging the threads. -For example, the diameter of the guide is 10 mm or less at the center between the protrusions for fiber separation, and 60 mm at both ends.
It has a rod-like structure in which rotary circular units of m or less in size are connected by protrusions for fiber separation.
凝固ガイドの径を10mm以上とすると、ガイドによる
摩擦抵抗が大きくなり、紡糸性が低下し易くなる。また
ガイド両端部の径が60mm以上になると凝固液流の乱
れが増幅されてやはり紡糸性の低下を招く傾向にある。When the diameter of the coagulation guide is 10 mm or more, the frictional resistance due to the guide becomes large, and the spinnability tends to deteriorate. Furthermore, if the diameter of both ends of the guide exceeds 60 mm, turbulence in the flow of the coagulating liquid is amplified, which tends to cause a decrease in spinnability.
このガイドの表面は一般的にクロム鍍金などの金属、ア
ルミナ、チタンや高性能カラスなどのセラミックス、ナ
イロン、フェノール樹脂、フッソ樹脂などのプラスチッ
クスなとて製作され、表面が糸条の傷を防止するために
摩擦力が小さく平滑に仕上がっている必要がある。The surface of this guide is generally made of metals such as chrome plating, ceramics such as alumina, titanium, and high-performance glass, and plastics such as nylon, phenolic resin, and fluorine resin, and the surface prevents the thread from being scratched. In order to achieve this, the friction force must be small and the surface must have a smooth finish.
各々のブロックから糸条を紡糸する方法は、要求される
糸条の繊度などによって変化するが、本発明では少なく
とも1または2ヶ以上のブロックからの単糸を集束して
複数の糸条を垂直方向に紡糸し、少なくとも表層を凝固
させたのち、凝固ガイドで分繊して方向を変換し引き取
ることが必要である。この場合、複数のブロックからの
糸条を同一の凝固ガイド部分に引き取ることも可能であ
り、またガイド出の糸条を合糸してもよいが、糸条の安
定性の面からは1または2ケのブロックからの単糸を集
束し、凝固ガイドの同一部分で引き取り、ガイドで方向
を変換した以降もその分繊状態を保持し、凝固浴から引
き取ることが好ましい。The method for spinning yarn from each block varies depending on the required fineness of the yarn, etc., but in the present invention, single yarns from at least one or two or more blocks are collected and multiple yarns are spun vertically. After spinning in the same direction and coagulating at least the surface layer, it is necessary to separate the fibers using a coagulation guide, change the direction, and take it off. In this case, it is possible to take yarns from multiple blocks into the same coagulation guide part, and the yarns coming out of the guide may be combined, but from the viewpoint of yarn stability, one or It is preferable to bundle the single filaments from two blocks, take them off at the same part of the coagulation guide, maintain the divided state even after changing the direction with the guide, and take them out of the coagulation bath.
凝固浴の形状には特に制限がないが、液浴の乱れを防ぐ
ために口金周囲の液表面をポーラスメタル、#50〜5
00メツシュの金網などで保護することが好ましい。There is no particular restriction on the shape of the coagulation bath, but in order to prevent disturbance of the liquid bath, the liquid surface around the nozzle is covered with porous metal, #50~5.
It is preferable to protect it with a 00 mesh wire mesh or the like.
本発明に適用する重合体は、湿式紡糸で紡糸されるもの
であれば特に制限はないが、単量体としてアクリロニト
リルを90%以上含有するアクリル系ポリマからなるポ
リアクリロニトリルに適用すると、紡糸性の向上に効果
がある。特に毛羽などが少ない高品位の糸条が要求され
る炭素繊維用途のアクリロニトリル*維の製造にて起用
すると効果が大きい。The polymer applied to the present invention is not particularly limited as long as it can be spun by wet spinning, but when applied to polyacrylonitrile, which is an acrylic polymer containing 90% or more of acrylonitrile as a monomer, spinnability is Effective for improvement. It is especially effective when used in the production of acrylonitrile* fibers for carbon fiber applications, which require high-quality yarn with little fuzz.
以下本発明を実施例により詳しく説明する。The present invention will be explained in detail below with reference to Examples.
[実施例]
実施例1
アクリル系共重合体を口金より一旦空気中に押し出した
のち凝固浴に導き凝固させ、該糸条を浴中の深さ500
mmに位置した折り返しガイドを用いて変向して弓き取
った。[Example] Example 1 An acrylic copolymer was once extruded into the air from a die, then introduced into a coagulation bath and coagulated, and the yarn was placed at a depth of 500 mm in the bath.
The bow was turned and harvested using a folded guide located at mm.
ここで口金と凝固液面との距離aが4mmになるように
口金の高さを調整し、口金としては総孔数が4500H
であり、孔間隔は1mmのものを用いた。また凝固の方
向変換ガイドとしては、高さ20mmの突起のあるもの
と、突起の無いものを用いた。何れの場合も凝固浴出か
らは4500フィラメント単位で引き取り、後工程に供
給した。Here, adjust the height of the cap so that the distance a between the cap and the coagulating liquid level is 4 mm, and the total number of holes for the cap is 4500H.
The hole spacing was 1 mm. Further, as the solidification direction changing guide, one with a protrusion of 20 mm in height and one without a protrusion were used. In each case, 4,500 filaments were withdrawn from the coagulation bath and supplied to the subsequent process.
各々の条件における限界紡糸速度と、紡糸速度15m、
/rninにおける糸品位を第1表に示す。Limit spinning speed under each condition and spinning speed 15m,
Table 1 shows the yarn quality at /rnin.
(以下余白)
第1表
本発明の範囲内の条件(No、5.7)では25m/m
in以上の限界紡糸速度を得ることが出来るのに対して
、ガイドに分繊用の突起がなく一本の糸条として紡糸さ
れるもの(No、1−3)、およびブロックに分割しな
いものやブロック間隔カ狭いもの(No、4.6)は紡
糸性が低下する。(Left below) Table 1: 25 m/m under conditions within the scope of the present invention (No, 5.7)
In contrast, there are those that do not have a splitting protrusion on the guide and are spun as a single thread (No. 1-3), those that are not divided into blocks, and those that are not divided into blocks. If the block spacing is narrow (No. 4.6), the spinnability decreases.
実施例2
アクリル系共重合体を口金より一旦3mmに設定した空
気層に押し出したのち凝固浴に導き、凝固糸条を折り返
しガイドを用いて変向して引き取った。Example 2 An acrylic copolymer was once extruded from a die into an air space set to a thickness of 3 mm, and then introduced into a coagulation bath, and the coagulated thread was turned around using a folding guide and taken off.
ここで口金として総孔数が1000Hて、500Hづつ
の円形の2ブロツクに穿孔したものを用いた。またガイ
ドについても中央に高さの異なる分繊用の突起を有する
ものを用いた。Here, a cap with a total number of holes of 1000H and two circular blocks of 500H each was used. Also, a guide having a protrusion for separating fibers of different heights in the center was used.
紡糸安定性を比較するため24時間連続紡糸を行い、次
の2つの項目について評価を実施した。In order to compare the spinning stability, continuous spinning was performed for 24 hours, and the following two items were evaluated.
A、混繊性 突起の高さが12mmの固定ガイドを用い
て口金のブロック間隔を変更し、口金より凝固ガイドの
間での糸の乱れを観察した。A. Fiber mixing A fixed guide with a protrusion height of 12 mm was used to change the block interval of the nozzle, and the disorder of the yarn was observed between the coagulation guide and the nozzle.
B1分繊性 口金の溝間隔を10mmに保ち、凝固浴ガ
イドの突起の高さを変え、糸条がガイド突起を越えてと
なりの糸条に移動合流する回数を観察した。B1 Fibrillation property The groove interval of the spinneret was maintained at 10 mm, the height of the protrusion of the coagulation bath guide was varied, and the number of times the yarn moved over the guide protrusion and merged with the adjacent yarn was observed.
結果を第2.3表に示す。ブロック間隔が2a(この場
合6mm)に満たないものや、突起部分の高さが5mm
未満のガイドを用いた場合には、紡糸性が劣ることが分
かる。The results are shown in Table 2.3. Those where the block spacing is less than 2a (in this case 6mm) or the height of the protrusion is 5mm
It can be seen that the spinnability is poor when a guide of less than
第2表 第3表
[発明の効果]
本発明の静置浴乾湿式紡糸方法によれば、比較的高速で
、安定した紡糸を行うことが出来る。またフィラメント
数が多い糸条と少ない糸条を同一の紡糸機で生産性良く
紡糸することが可能どなる。Table 2 Table 3 [Effects of the Invention] According to the static bath dry-wet spinning method of the present invention, stable spinning can be performed at a relatively high speed. Furthermore, it becomes possible to spin yarns with a large number of filaments and yarns with a small number of filaments with high productivity using the same spinning machine.
Claims (1)
ブロック化して配し、1つのブロックと他のブロックの
間隔を2a以上とするとともに、口金のほぼ直下の凝固
浴中に、1またはそれ以上の、突起部分の高さが5mm
以上である分繊用の突起を有する固定式凝固浴中ガイド
を設け、ブロック単位に複数のマルチフィラメントを垂
直方向に紡糸し、固定ガイドの突起間に分繊したのち、
引き取ることを特徴とする乾湿式紡糸方法。 ここでaは口金端部における口金と凝固浴液面との距離
である。[Claims] In the static bath dry-wet spinning method, the holes of the spinneret are arranged in blocks of two or more, the interval between one block and the other block is 2a or more, and the holes almost directly under the spinneret are arranged in blocks. One or more protrusions with a height of 5 mm in the coagulation bath
A fixed coagulation bath guide having the protrusions for fiber splitting as described above is provided, a plurality of multifilaments are vertically spun in blocks, and the fibers are split between the protrusions of the fixed guide.
A wet-dry spinning method characterized by pulling. Here, a is the distance between the cap and the coagulation bath liquid level at the end of the cap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24362888A JPH0291206A (en) | 1988-09-27 | 1988-09-27 | Dry-wet spinning process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24362888A JPH0291206A (en) | 1988-09-27 | 1988-09-27 | Dry-wet spinning process |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0291206A true JPH0291206A (en) | 1990-03-30 |
JPH043444B2 JPH043444B2 (en) | 1992-01-23 |
Family
ID=17106653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24362888A Granted JPH0291206A (en) | 1988-09-27 | 1988-09-27 | Dry-wet spinning process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0291206A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020196277A1 (en) | 2019-03-28 | 2020-10-01 | 東レ株式会社 | Acrylonitrile-based fiber bundle manufacturing method |
JP2022047402A (en) * | 2020-09-11 | 2022-03-24 | 帝人株式会社 | Method for producing acrylic fiber |
-
1988
- 1988-09-27 JP JP24362888A patent/JPH0291206A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020196277A1 (en) | 2019-03-28 | 2020-10-01 | 東レ株式会社 | Acrylonitrile-based fiber bundle manufacturing method |
JP2022047402A (en) * | 2020-09-11 | 2022-03-24 | 帝人株式会社 | Method for producing acrylic fiber |
Also Published As
Publication number | Publication date |
---|---|
JPH043444B2 (en) | 1992-01-23 |
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