JPS6399327A - Spinning of pitch yarn - Google Patents
Spinning of pitch yarnInfo
- Publication number
- JPS6399327A JPS6399327A JP61240740A JP24074086A JPS6399327A JP S6399327 A JPS6399327 A JP S6399327A JP 61240740 A JP61240740 A JP 61240740A JP 24074086 A JP24074086 A JP 24074086A JP S6399327 A JPS6399327 A JP S6399327A
- Authority
- JP
- Japan
- Prior art keywords
- pitch
- spinning
- nozzle
- nozzle hole
- spinning nozzle
- 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
- 238000009987 spinning Methods 0.000 title claims abstract description 86
- 239000000835 fiber Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 15
- 239000008187 granular material Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 4
- 239000011295 pitch Substances 0.000 description 52
- 230000000052 comparative effect Effects 0.000 description 6
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- 239000011302 mesophase pitch Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000006027 Birch reduction reaction Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- -1 sintered bodies Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、炭素繊維であるピッチ繊維の紡糸方法に関し
、特に、長時間紡糸してもむらやクラックの発生しない
ピッチｍｒａの紡糸方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for spinning pitch fibers, which are carbon fibers, and particularly to a method for spinning pitch mra that does not cause unevenness or cracks even when spinning for a long time.
［従来の技術］
炭素繊維は、軽くて電気伝導性もよく、耐熱性も高いと
いった特徴を有しており、中でもピッチｍ＃Ｉは、他の
炭素系ｔａ！ｌに比べて、原料の潤沢がよく、炭化工程
の歩留りも大きく、さらには繊維の弾性率が高いなどの
利点を有するところから。[Prior Art] Carbon fiber has the characteristics of being light, having good electrical conductivity, and high heat resistance. Among them, the pitch m#I is higher than that of other carbon-based ta! This is because it has the advantages of having a better supply of raw materials, a higher yield in the carbonization process, and a higher modulus of fiber elasticity than L.
種々の分野でその利用が図られている。Its use is being attempted in various fields.
しかし、ピッチｍ維にクラックが発生したり、ピッチ繊
維を焼成して得られる炭素繊維にクラックが発生し、そ
の結果、炭素繊維の機械的強度が低いといった欠点があ
った。このため、クラックの発生をなくし、機械的強度
を高めるため従来多くのピッチ繊維の紡糸方法が提案さ
れている。However, cracks occur in the pitch m fibers, and cracks occur in the carbon fibers obtained by firing the pitch fibers, and as a result, the mechanical strength of the carbon fibers is low. For this reason, many pitch fiber spinning methods have been proposed in order to eliminate the occurrence of cracks and increase mechanical strength.
このうち、紡糸ノズルの上流部に充填層を設け、紡糸ピ
ッチをこの充填層に流通させた後、紡糸ノズルに流通さ
せピッチｔｍ＃を紡糸する方法が特開昭５１３−８８９
０９号および同８１−１２９１１１号に開示されている
。Among these methods, a method is disclosed in JP-A-513-889 in which a packed bed is provided upstream of the spinning nozzle, and the spinning pitch is passed through the packed bed and then passed through the spinning nozzle to spin the pitch tm#.
No. 09 and No. 81-129111.
［解決すべき問題点］
しかしながら、上述の特開昭５９−８８９０９号および
同８１−１２９１９号に示されている方法は、クラック
の発生をかなり防止することはできるものの十分とはい
えず、長時間紡糸を続けると紡糸むらの発生することが
実験の結果判明した。[Problems to be Solved] However, although the methods shown in the above-mentioned Japanese Patent Application Laid-open Nos. 59-88909 and 81-12919 can prevent the occurrence of cracks to a large extent, they are not sufficient and have not been used for a long time. As a result of experiments, it was found that if spinning continues for a long time, uneven spinning occurs.
本発明は上記の問題点にかんがみてなされたもので、ク
ラックの発生を防止し、繊維の機械的強度を高めつつ、
長時間紡糸を続けても紡糸むらの発生しないピッチ繊維
の紡糸方法の提供をＦｌ的とした。The present invention was made in view of the above problems, and it prevents the occurrence of cracks, increases the mechanical strength of fibers, and
The objective of the present invention was to provide a pitch fiber spinning method that does not cause uneven spinning even if spinning is continued for a long time.
［問題点の解決手段］
本発明者は上記目的を達成するため鋭意検討した結果、
ノズル孔指数Ｆが１０以上である紡糸ノズル孔の上流部
分に、ピッチ流変更部と、先端面と紡糸方向との角度θ
が４５°〜９０°であるピッチ貯留部とを設けた紡糸ノ
ズル内に、紡糸ピッチを流通させることにより上記目的
を達成することを見い出し１本発明に到達した。[Means for solving the problem] As a result of intensive studies to achieve the above object, the inventor has found that
In the upstream part of the spinning nozzle hole where the nozzle hole index F is 10 or more, there is a pitch flow changing part and an angle θ between the tip surface and the spinning direction.
The inventors have discovered that the above object can be achieved by circulating the spinning pitch through a spinning nozzle provided with a pitch storage section in which the pitch angle is between 45° and 90°.
すなわち本発明は、ピッチ流変更部、ピッチ貯留部およ
び紡糸ノズル孔を備えた紡糸ノズル内に、紡糸ピッチを
。That is, the present invention adjusts the spinning pitch in a spinning nozzle that includes a pitch flow changing section, a pitch storage section, and a spinning nozzle hole.
■ まず、ピッチ流変更部、
■ 次いで、先端面と紡糸方向との角度０が４５°〜９
０°であるピッチ貯留部、
■ ソノ後、ノズル孔指ａＦ（＝Ｚ２／Ｄ＠Ｌ）が１０
以上である紡糸ノズル孔、
の順序で流通させピッチ繊維を紡糸する方法としである
。■ First, the pitch flow changing part, ■ Next, the angle 0 between the tip surface and the spinning direction is 45° to 9
The pitch storage part is 0°, ■ After sono, the nozzle hole finger aF (=Z2/D@L) is 10
This is a method of spinning pitch fibers by passing through the spinning nozzle holes in the following order.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
まず、本発明の紡糸方法に用いる紡糸ノズルの一実施例
を第１図にもとづいて説明する。紡糸ノズル１０は、そ
の内部に、上流側より順にピッ慟流変更部１１、ピッチ
貯留部１２、ノズル孔１３が形成しである。First, an embodiment of a spinning nozzle used in the spinning method of the present invention will be described based on FIG. Inside the spinning nozzle 10, a pitch flow changing section 11, a pitch storage section 12, and a nozzle hole 13 are formed in order from the upstream side.
ピッチ流変更部１１は、紡糸ピッチの流れを乱すための
部材１１ａを厚さ１層層〜１０ｃｍの範囲内で積層して
形成しである。ピッチ流を乱すための部材１１ａとして
は、金属性あるいは無ａ質製の粒体、粉体、焼結体、不
織布、織布などを用い、好ましくは粒体のもの、特に好
ましくは粒体の内の球体のものを用いる。この場合の粒
体としては、径が０．０１ｍｍ〜５１のものが好ましく
、粒体の径が５１層以上となると、ピッチ流の乱れが不
十分となる。なお、このピッチ流変更部１１は、ピッチ
貯留部１２と分割できるように形成することも可能であ
る。The pitch flow changing section 11 is formed by laminating members 11a with a thickness of 1 layer to 10 cm for disturbing the flow of spinning pitch. As the member 11a for disturbing the pitch flow, metal or aluminous granules, powder, sintered bodies, non-woven fabrics, woven fabrics, etc. are used, preferably granules, particularly preferably granules. Use the spherical one inside. In this case, the grains preferably have a diameter of 0.01 mm to 51 layers, and if the diameter of the grains exceeds 51 layers, the pitch flow will not be sufficiently disturbed. Note that this pitch flow changing section 11 can also be formed so that it can be separated from the pitch storage section 12.
ピッチ貯留部１２は、ピッチ流変更部１１より。The pitch storage section 12 is from the pitch flow changing section 11.
流れてきた紡糸ピッチを一時貯留する部分であり、ノズ
ル孔１３に接する先端面と紡糸方向との角度０が４５°
〜９Ｇ’となるようにしである。この角度θは、実験の
結果、６０°〜９０’であることが好ましく、８０°〜
８０°としたとさらに好ましい結果の得られることが判
った。また、ピッチ貯留部指数Ｇ
Ｇ＝Ｐ−ｓｉｎＯ（Ｐ：ピッチ貯留部長さ）が３．５〜
５０となるようにしである。なお。This is a part that temporarily stores the flowing spinning pitch, and the angle 0 between the tip surface in contact with the nozzle hole 13 and the spinning direction is 45°.
~9G'. As a result of experiments, this angle θ is preferably 60° to 90', and 80° to 90'.
It has been found that even more favorable results can be obtained by setting the angle to 80°. In addition, the pitch reservoir index G G = P-sinO (P: pitch reservoir length) is 3.5 ~
It is set to be 50. In addition.
ピッチ貯留部１２の内径Ｚは１通常２ｍｍ以下としであ
る。The inner diameter Z of the pitch storage portion 12 is usually 2 mm or less.
紡糸ノズル孔１３は、ピッチ貯留部１２からの紡糸ピッ
チを吐出して紡糸するもので、そのノズル孔径りは１通
常０．００５ｍ＋ｗ〜０．５１、好ましくは０．０５諺
腸〜０．３脂■としである。また。The spinning nozzle hole 13 is for spinning by discharging the spinning pitch from the pitch storage section 12, and the diameter of the nozzle hole is usually 0.005 m+w to 0.51 m+w, preferably 0.05 m+w to 0.3 m+w. ■It's Toshishita. Also.
ノズル孔長さＬとノズル孔径りの比Ｌ／Ｄは、通常０．
５〜２０、好ましくは１．０〜１０としである。The ratio L/D between the nozzle hole length L and the nozzle hole diameter is usually 0.
5 to 20, preferably 1.0 to 10.
さらに、ノズル孔指数Ｆ
Ｆ＝Ｚ２／Ｄ−Ｌ
は、１０〜５０００となるようにしである。このノズル
孔指数Ｆも、実験の結果、１０〜３０００であることが
好ましく、ｉｏｏ〜１０００としたとさらに好ましい結
果の得られることが判った。Furthermore, the nozzle hole index FF=Z2/DL is set to be 10 to 5000. As a result of experiments, it was found that the nozzle hole index F is preferably 10 to 3,000, and more preferable results can be obtained when it is set to ioo to 1,000.
本発明は、このような構成からなる紡糸ノズル１０内に
紡糸ピッチを供給し、ピッチ流変更部１１、ピッチ貯留
部１２を流通させ、ノズル孔１３より０．５ｋｇ／ｃ鳳
２〜５０ ｋｇ／ ｃｍ２ 、好ましくはｌ 、 Ｏｋ
ｇ／ ｃｍ２〜１０ ｋｇ／ ｃｍ２の吐出圧で吐出さ
せてピッチ繊維の紡糸を行なう。In the present invention, the spinning pitch is supplied into the spinning nozzle 10 having such a configuration, and is circulated through the pitch flow changing section 11 and the pitch storage section 12, and the spinning pitch is supplied through the nozzle hole 13 at a rate of 0.5 kg/c or 2 to 50 kg/ cm2, preferably l, Ok
Pitch fibers are spun by discharging at a discharge pressure of g/cm2 to 10 kg/cm2.
本発明に用いる紡糸ピッチとしては石炭系１石油系およ
び化学系のピッチを使用することが好ましい、このよう
なピッチは、光学的異方性ピッチであり、紡糸時に適度
な流動特性（粘度、および曳糸性）を有することが好ま
しい。As the spinning pitch used in the present invention, it is preferable to use coal-based, petroleum-based, and chemical-based pitches. Such pitches are optically anisotropic pitches and have appropriate fluidity properties (viscosity and It is preferable that the fiber has good stringability).
一方、流動特性との兼ね合いではあるが、不融化時の融
着を防止するためには、軟化点を比較的高くする方が良
い、このような性状を満足させるためには以下に示すピ
ッチ性状が好ましい。On the other hand, in order to prevent fusion during infusibility, it is better to have a relatively high softening point, although it is a balance with flow characteristics.In order to satisfy such properties, the following pitch properties are required. is preferred.
Ｍｎ ： ５００〜１５００ （好ましくは、９０
０〜１ｌ１００）、 ／Ｍｎ： １．１〜３（好ましく
は、 １．５〜１．７）軟化点：２５０℃〜３５０℃（
好ましくは、２７０℃〜 ３３０℃）
ＱＩ：５％〜６０％（好ましくは５％〜５０％）［実施
例および比較例］
以下、実施例および比較例にもとづいて本発明を具体的
に説明する。Mn: 500 to 1500 (preferably 90
0-1l100), /Mn: 1.1-3 (preferably 1.5-1.7) Softening point: 250°C-350°C (
Preferably 270°C to 330°C) QI: 5% to 60% (preferably 5% to 50%) [Examples and Comparative Examples] The present invention will be specifically described below based on Examples and Comparative Examples. .
〈実施例１〉
接触分解残渣油を用いて得られた光学異方性相１００％
のメソフェーズピッチを原料として用いた。このピッチ
は、軟化点が３２０℃でＢｉｒｃｈ 還元を行なった後
測定した数平均分子量は１１００であった。このピッチ
を上述した構造の紡糸ノズルを用いて紡糸した。紡糸ノ
ズルにおける条件は、充填層の厚み２０■■、充填層粒
径３ＷＩｌ。<Example 1> 100% optically anisotropic phase obtained using catalytic cracking residual oil
Mesophase pitch was used as a raw material. This pitch had a softening point of 320° C. and a number average molecular weight of 1100 as measured after Birch reduction. This pitch was spun using the spinning nozzle having the structure described above. The conditions in the spinning nozzle were a packed bed thickness of 20 mm and a packed bed particle size of 3 WIl.
Ｚ＝ ３ｍｍ、 Ｐ＝ １ ３ｍｍ、 Ｄ＝
０ 、 ２＋＊ｍ。Z= 3mm, P= 13mm, D=
0, 2+*m.
Ｉ、／Ｄ＝ １ 、０＝９０°、Ｆ＝２２５の形状のも
のを用いた。紡糸条件は、紡糸温度３５０℃、紡糸圧力
５ ｋｇ／ ｃ〜２ 、巻取速度５００ｍ／ｓｉｎで
巻き取り、１２．のピッチ繊維を得た。The shape of I, /D=1, 0=90°, and F=225 was used. The spinning conditions were a spinning temperature of 350°C, a spinning pressure of 5 kg/c~2, and a winding speed of 500 m/sin.12. of pitch fibers were obtained.
得られた繊維は、２０時間連続紡糸後もクラックおよび
紡糸むらが生じることはなく、第２図に示すような断面
構造であった。このピッチ繊維を２００℃から４００℃
まで１０分間で昇温し１、不融化を行なった。さらに、
１５００℃で５分間焼成を行ない炭素繊維を得た。得ら
れた繊維の強度は３００ｋｇ／ｍ層？１弾性率は３０ｔ
／磨麿２であった。The obtained fiber showed no cracks or uneven spinning even after 20 hours of continuous spinning, and had a cross-sectional structure as shown in FIG. This pitch fiber is heated from 200℃ to 400℃.
The temperature was raised in 10 minutes to 1 to infusible. moreover,
Firing was performed at 1500° C. for 5 minutes to obtain carbon fibers. The strength of the obtained fiber is 300kg/m layer? 1 elastic modulus is 30t
/ It was Mamaro 2.
（実施例２〉
実施例１で用いてメソフェーズピッチを用いて紡糸した
。紡糸ノズルにおける条件は、充填層の厚ミ１０ｍｍ、
充填層粒径０．０７ｍｍ、Ｚ＝１０ｍｍ、Ｐ＝２０ｍｍ
、Ｄ＝０．３ｔｓ、Ｌ／Ｄ＝４゜０＝９０１１．Ｆ＝２
７８の形状のものを用いた。(Example 2) Spinning was carried out using the mesophase pitch used in Example 1.The conditions in the spinning nozzle were: the thickness of the packed layer was 10 mm;
Packed bed particle size 0.07mm, Z=10mm, P=20mm
, D=0.3ts, L/D=4°0=9011. F=2
78 shape was used.
紡糸条件は、紡糸温度３５０℃、紡糸圧力３ ｋｇ／
ｃｍ２ 、巻取速度５００ｍ７ｓｉｎで巻きとり、１２
蓼のピッチ繊維を得た（強度２９０ ｋｇ／ ｍｍ２゜
弾性率２８ｔ／會層２）。The spinning conditions were a spinning temperature of 350°C and a spinning pressure of 3 kg/
cm2, winding at a winding speed of 500 m7sin, 12
A pitch fiber was obtained (strength: 290 kg/mm2°, elastic modulus: 28 t/layer 2).
さらに、紡糸温度３７０℃、紡糸圧力
２ ｋｇ／ ｃｍ２ 、巻取速度５００ ａ／ｗｉｎ
テ巻きとり１２卦のピッチ繊維を得た（′強度３１０
ｋｇ／ｍ層２゜弾性＄ ３０ ｔ／ ｍｍ２）、 得
ｊ”＋ ｈりｔＪｋ！ｌ ハ、２０時間連続紡糸後もク
ラックおよび紡糸むらが生じることはなく、それぞれ第
３図および第４図に示すような断面構造であった。Furthermore, the spinning temperature was 370°C, the spinning pressure was 2 kg/cm2, and the winding speed was 500 a/win.
A pitch fiber of 12 trigrams was obtained (strength: 310
kg/m layer 2゜elasticity $ 30 t/mm2), yield j"+ hri tJk!l C. No cracks or uneven spinning occurred even after 20 hours of continuous spinning, as shown in Figures 3 and 4, respectively. It had a cross-sectional structure as shown.
（比較例１〉
実施例１で用いたメソフェーズピッチを用いて紡糸した
。紡糸ノズルは、実施例１のものから充ＪＲ層を除いた
ものを用い、紡糸条件も実施例１のものと同じ条件で行
なった。その結果、強度２５０ ｋｇ／ ｍｍ２ 、弾
性率２０ ｔ／層履２め第５図に示すような断面ラジア
ル構造の繊維が得られた。(Comparative Example 1) Spinning was carried out using the mesophase pitch used in Example 1. The spinning nozzle was the same as in Example 1 except for the full JR layer, and the spinning conditions were the same as in Example 1. As a result, a fiber having a radial cross-sectional structure as shown in FIG. 5 was obtained, having a strength of 250 kg/mm2 and an elastic modulus of 20 t/layer.
（比較例２）
実施例１で用いたメソフェーズピッチを用いて紡糸した
。紡糸ノズルは、実施例１のものからθを３０℃に変化
させたものを用い、紡糸条件も実施例１のものと同じ条
件で行なった。その結果、第６図に示すような断面ラジ
アル構きで部分的にクラックを有するｍ雄が得られた。(Comparative Example 2) The mesophase pitch used in Example 1 was used for spinning. The spinning nozzle used in Example 1 was changed in θ to 30° C., and the spinning conditions were the same as in Example 1. As a result, an m-male with a radial cross-section and partially cracked as shown in FIG. 6 was obtained.
〈比較例３〉
実施例１で用いたメソフェーズピッチを用いて紡糸した
。紡糸ノズルにおける条件は、充填層の厚み１７．８ｍ
ｍ、充填層は１００メツシユのニッケル粒体を焼結させ
て（１られた焼結体、Ｚ＝６．４層■、Ｄ＝０．５濡■
、Ｉ、／Ｄ＝２３．４゜θ＝９０’ 、Ｐ＝３ｍ層、Ｆ
＝７．０の形状のものを用い、実施例１のものと同じ条
件で行なった。<Comparative Example 3> The mesophase pitch used in Example 1 was used for spinning. The conditions in the spinning nozzle are that the thickness of the packed layer is 17.8 m.
m, the packed layer was made by sintering 100 meshes of nickel particles (sintered body, Z = 6.4 layers, D = 0.5 layers).
, I, /D=23.4°θ=90', P=3m layer, F
The test was carried out under the same conditions as in Example 1 using a sample having a shape of =7.0.
その結果、２時間紡糸後に紡糸が不可能となった。As a result, spinning became impossible after 2 hours of spinning.
［発明の効果］
以上のように、本発明によれば、クラックが発生せず１
機械的強度の大きい、紡糸むらのないピッチ繊維を紡糸
でさる効果がある。[Effects of the Invention] As described above, according to the present invention, cracks do not occur and 1
It has the effect of spinning pitch fibers with high mechanical strength and no uneven spinning.
第１図は本発明方法に用いる紡糸ノズルの一実施例の構
造図、第２図ないし第６図は本実施例および比較例によ
って得られたｔａ雑の断面構造図を示す。FIG. 1 is a structural diagram of one embodiment of a spinning nozzle used in the method of the present invention, and FIGS. 2 to 6 are cross-sectional structural diagrams of ta-sumi obtained in this embodiment and a comparative example.
Claims (4)
孔を備えた紡糸ノズル内に、紡糸ピッチを次の順序で流
通させて紡糸することを特徴としたピッチ繊維の紡糸方
法。 イ、ピッチ流変更部を流通させ、 ロ、次いで、先端面と紡糸方向との角度θが４５°〜９
０°であるピッチ貯留部を流通させ、 ハ、その後、ノズル孔指数 Ｆ（＝Ｚ＾２／Ｄ・Ｌ）が１０以上である 紡糸ノズル孔を流通させる。(1) A pitch fiber spinning method characterized in that spinning is performed by circulating spinning pitch in the following order in a spinning nozzle equipped with a pitch flow changing section, a pitch storage section, and a spinning nozzle hole. A. Let the pitch flow change part flow, B. Then, the angle θ between the tip surface and the spinning direction is 45° to 9.
A pitch storage portion having a pitch of 0° is circulated, and then a spinning nozzle hole having a nozzle hole index F (=Z^2/D·L) of 10 or more is circulated.
５〜５０であることを特徴とした特許請求の範囲第１項
記載のピッチ繊維の紡糸方法。(2) The pitch reservoir index G (=P・sinθ) is 3.
5. The method for spinning pitch fibers according to claim 1, wherein the pitch fiber is 5 to 50.
０°〜９０°であることを特徴とした特許請求の範囲第
１または２項記載のピッチ繊維の紡糸方法。(3) The angle θ between the tip surface of the pitch storage part and the spinning direction is 6
3. The method for spinning pitch fibers according to claim 1 or 2, wherein the pitch is 0° to 90°.
とを特徴とした特許請求の範囲第１、２または３項記載
のピッチ繊維の紡糸方法。(4) The pitch fiber spinning method according to claim 1, 2 or 3, wherein the pitch flow changing section is filled with granules.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61240740A JPH0791696B2 (en) | 1986-10-09 | 1986-10-09 | Pitch fiber spinning method |
| US07/096,858 US4816202A (en) | 1986-10-09 | 1987-09-14 | Method of melt spinning pitch |
| EP87113894A EP0263358A3 (en) | 1986-10-09 | 1987-09-23 | Nozzle for melt spinning of pitch and method for spinning pitch |
| KR1019870011285A KR930003223B1 (en) | 1986-10-09 | 1987-10-06 | Nozzle for melt spinning of pitch and method for spinning pitch |
| US07/253,762 US4887957A (en) | 1986-10-09 | 1988-10-05 | Nozzle for melt spinning of pitch and method for spinning pitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61240740A JPH0791696B2 (en) | 1986-10-09 | 1986-10-09 | Pitch fiber spinning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6399327A true JPS6399327A (en) | 1988-04-30 |
| JPH0791696B2 JPH0791696B2 (en) | 1995-10-04 |
Family
ID=17063992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61240740A Expired - Lifetime JPH0791696B2 (en) | 1986-10-09 | 1986-10-09 | Pitch fiber spinning method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0791696B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59168127A (en) * | 1983-03-15 | 1984-09-21 | Toray Ind Inc | Production of carbon fiber |
| JPS61186520A (en) * | 1985-02-07 | 1986-08-20 | Mitsubishi Chem Ind Ltd | Production of pitch carbon yarn |
| JPS61258024A (en) * | 1985-05-08 | 1986-11-15 | Mitsubishi Chem Ind Ltd | Production of pitch carbon yarn |
-
1986
- 1986-10-09 JP JP61240740A patent/JPH0791696B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59168127A (en) * | 1983-03-15 | 1984-09-21 | Toray Ind Inc | Production of carbon fiber |
| JPS61186520A (en) * | 1985-02-07 | 1986-08-20 | Mitsubishi Chem Ind Ltd | Production of pitch carbon yarn |
| JPS61258024A (en) * | 1985-05-08 | 1986-11-15 | Mitsubishi Chem Ind Ltd | Production of pitch carbon yarn |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0791696B2 (en) | 1995-10-04 |
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