JPWO2020066653A5

JPWO2020066653A5 -

Info

Publication number: JPWO2020066653A5
Application number: JP2019550872A
Authority: JP
Filing date: 2019-09-12
Publication date: 2022-08-02
Anticipated expiration: 2039-09-12

Description

上記課題を解決するため、本発明の耐炎化繊維束の製造方法は、次の構成を有する。すなわち、
複数の束を隣接させて引き揃えたアクリル系繊維束を、耐炎化炉外両側に設置されるガイドローラーによって搬送させながら、熱風加熱式の耐炎化炉内を走行させて酸化性雰囲気中で熱処理する耐炎化繊維束の製造方法であって、耐炎化炉内における熱風の方向が繊維束の走行方向に対して平行であって、次式（１）で定義される隣接繊維束間の接触率Ｐを２～１８％とし、前記ガイドローラー間の水平距離が２０ｍ以上であり、耐炎化炉内を流れる熱風の風速が２．０～５．０ｍ／秒である耐炎化繊維束の製造方法、である。 In order to solve the above problems, the method for producing a flameproof fiber bundle of the present invention has the following configuration. i.e.
The acrylic fiber bundles, which are arranged adjacent to each other, are transported by guide rollers installed on both sides outside the flameproofing furnace, and are heat-treated in an oxidizing atmosphere by running inside the hot air heating type flameproofing furnace. A method for producing a flameproof fiber bundle, wherein the direction of the hot air in the flameproofing furnace is parallel to the running direction of the fiber bundle, and the contact ratio between adjacent fiber bundles defined by the following formula (1) A method for producing a flameproofed fiber bundle, wherein P is 2 to 18%, the horizontal distance between the guide rollers is 20m or more, and the wind speed of hot air flowing in the flameproofing furnace is 2.0 to 5.0m/sec. , is.

ガイドローラー間の水平距離を２０ｍ以上にすることが必須であり、この場合、生産コストをより有利に低減させることができる。 It is essential that the horizontal distance between the guide rollers is 20 m or more, in which case the production costs can be reduced more favorably.

また、耐炎化炉内を流れる熱風の風速を２．０～５．０ｍ／秒にすることが必須である。耐炎化炉内を流れる熱風の風速をこの範囲とすることで、生産コストを有利に低減することができる。 Also, it is essential that the velocity of the hot air flowing through the flameproofing furnace is 2.0 to 5.0 m/sec. By setting the wind speed of the hot air flowing through the flameproofing furnace within this range, the production cost can be advantageously reduced.

（参考例１）
耐炎化炉１の熱処理室３両側のガイドローラー４間の水平距離Ｌ’を１５ｍとし、隣接繊維束間の接触率Ｐを１０％とした以外は、実施例１と同様にした。 ( Reference example 1 )
The procedure was the same as in Example 1, except that the horizontal distance L' between the guide rollers 4 on both sides of the heat treatment chamber 3 of the flameproofing furnace 1 was 15 m, and the contact ratio P between adjacent fiber bundles was 10%.

（実施例２）
耐炎化炉１の熱処理室３両側のガイドローラー４間の水平距離Ｌ’を３０ｍとし、隣接繊維束間の接触率Ｐを１５％とした以外は、実施例１と同様にした。 (Example 2 )
The procedure was the same as in Example 1, except that the horizontal distance L' between the guide rollers 4 on both sides of the heat treatment chamber 3 of the flameproofing furnace 1 was 30 m, and the contact ratio P between adjacent fiber bundles was 15%.

（実施例３）
耐炎化炉１の熱処理室３内の酸化性気体の水平方向の風速を５ｍ／秒とし、隣接繊維束間の接触率Ｐを７％とした以外は、実施例１と同様にした。 (Example 3 )
The procedure was the same as in Example 1, except that the horizontal wind speed of the oxidizing gas in the heat treatment chamber 3 of the flameproofing furnace 1 was 5 m/sec, and the contact ratio P between adjacent fiber bundles was 7%.

（参考例２）
耐炎化炉１の熱処理室３両側のガイドローラー４間の水平距離Ｌ’を１０ｍとし、隣接繊維束間の接触率Ｐを５％とした以外は、実施例１と同様にした。 ( Reference example 2 )
The procedure was the same as in Example 1, except that the horizontal distance L' between the guide rollers 4 on both sides of the heat treatment chamber 3 of the flameproofing furnace 1 was 10 m, and the contact ratio P between adjacent fiber bundles was 5%.

（参考例３）
耐炎化炉１の熱処理室３内の酸化性気体の水平方向の風速を８ｍ／秒とし、隣接繊維束間の接触率Ｐを１４％とした以外は、実施例１と同様にした。 ( Reference example 3 )
The procedure was the same as in Example 1, except that the horizontal wind velocity of the oxidizing gas in the heat treatment chamber 3 of the flameproofing furnace 1 was 8 m/sec, and the contact ratio P between adjacent fiber bundles was 14%.

（実施例４）
耐炎化炉１の熱処理室３両側のガイドローラー４をフラットローラーにし、隣接繊維束間の接触率Ｐを１４％とした以外は、実施例１と同様にした。 (Example 4 )
The procedure was the same as in Example 1 except that the guide rollers 4 on both sides of the heat treatment chamber 3 of the flameproofing furnace 1 were flat rollers and the contact ratio P between adjacent fiber bundles was 14%.

（実施例５）
用いたアクリル系繊維束の単繊維断面の長径／短径を１．５０とし、隣接繊維束間の接触率Ｐを１４％とした以外は、実施例１と同様にした。 (Example 5 )
The procedure was the same as in Example 1, except that the length/breadth of the single fiber cross section of the acrylic fiber bundle used was set to 1.50 and the contact ratio P between adjacent fiber bundles was set to 14%.

（実施例６）
用いたアクリル系繊維束のシリコン系油剤付着量を４．０％とし、隣接繊維束間の接触率Ｐを６％とした以外は、実施例１と同様にした。 (Example 6 )
The procedure was the same as in Example 1, except that the adhesion amount of the silicon-based oil agent to the acrylic fiber bundles used was 4.0%, and the contact ratio P between adjacent fiber bundles was 6%.

（実施例７）
用いたアクリル系繊維束にシリコン系油剤を付与せず、隣接繊維束間の接触率Ｐを６％とした以外は、実施例１と同様にした。 (Example 7 )
The procedure was the same as in Example 1, except that the acrylic fiber bundles used were not provided with a silicon-based oil and the contact ratio P between adjacent fiber bundles was set to 6%.

（実施例８）
用いたアクリル系繊維束のフックドロップ長を３５０ｍｍとし、隣接繊維束間の接触率Ｐを１４％とした以外は、実施例１と同様にした。 (Example 8 )
The procedure was the same as in Example 1 except that the hook drop length of the acrylic fiber bundle used was 350 mm and the contact ratio P between adjacent fiber bundles was 14%.

（実施例９）
用いたアクリル系繊維束の単繊維繊度を０．１８ｔｅｘとし、隣接繊維束間の接触率Ｐを１４％とした以外は、実施例１と同様にした。 (Example 9 )
The procedure was the same as in Example 1, except that the single fiber fineness of the acrylic fiber bundle used was 0.18 tex and the contact ratio P between adjacent fiber bundles was 14%.

（実施例１０）
耐炎化炉１の熱処理室３両側のガイドローラー４をフラットローラーにし、さらにそのフラットローラーから耐炎化炉の方向に３０ｍｍの位置に櫛ガイドを設置し、その櫛ガイドは幅方向に３～１５ｍｍの範囲の一定の間隔の隙間を持ち、その隙間を繊維束が通ることにより物理的に規制される繊維束のピッチ間隔を３～１５ｍｍの範囲で所定の間隔Ｗｐとし、隣接繊維束間の接触率Ｐを１４％とした以外は、実施例１と同様にした。 (Example 10 )
The guide rollers 4 on both sides of the heat treatment chamber 3 of the flameproofing furnace 1 are flat rollers, and a comb guide is installed at a position 30 mm from the flat roller in the direction of the flameproofing furnace, and the comb guide is 3 to 15 mm in the width direction. The pitch interval of the fiber bundles, which has a gap with a constant interval in the range and is physically regulated by passing the fiber bundle through the gap, is set to a predetermined interval Wp in the range of 3 to 15 mm, and the contact ratio between adjacent fiber bundles The same as Example 1 except that P was 14%.

Claims

複数の束を隣接させて引き揃えたアクリル系繊維束を、耐炎化炉外両側に設置されるガイドローラーによって搬送させながら、熱風加熱式の耐炎化炉内を走行させて酸化性雰囲気中で熱処理する耐炎化繊維束の製造方法であって、耐炎化炉内における熱風の方向が繊維束の走行方向に対して平行であって、次式（１）で定義される隣接繊維束間の接触率Ｐを２～１８％とし、前記ガイドローラー間の水平距離が２０ｍ以上であり、耐炎化炉内を流れる熱風の風速が２．０～５．０ｍ／秒である耐炎化繊維束の製造方法。
Ｐ＝［１－ｐ（ｘ）｛－ｔ＜ｘ＜ｔ｝］×１００（１）
ここで、Ｐは隣接繊維束間の接触率（％）、ｔは隣接する繊維束間の隙間（ｍｍ）、ｐ（ｘ）は正規分布Ｎ（０、σ^２）の確率密度関数、σは振幅の標準偏差、ｘは振幅の中央をゼロとする確率変数を表す。 The acrylic fiber bundles, which are arranged adjacent to each other, are transported by guide rollers installed on both sides outside the flameproofing furnace, and are heat-treated in an oxidizing atmosphere by running inside the hot air heating type flameproofing furnace. A method for producing a flameproof fiber bundle, wherein the direction of the hot air in the flameproofing furnace is parallel to the running direction of the fiber bundle, and the contact ratio between adjacent fiber bundles defined by the following formula (1) A method for producing a flameproofed fiber bundle, wherein P is 2 to 18%, the horizontal distance between the guide rollers is 20m or more, and the wind speed of hot air flowing in the flameproofing furnace is 2.0 to 5.0m/sec. .
P=[1−p(x){−t<x<t}]×100 (1)
Here, P is the contact rate (%) between adjacent fiber bundles, t is the gap between adjacent fiber bundles (mm), p(x) is the probability density function of normal distribution N (0, σ ² ), and σ is The standard deviation of the amplitude, x represents a random variable with zero at the center of the amplitude.

前記ガイドローラーが糸幅規制機構を有する請求項１に記載の耐炎化繊維束の製造方法。 2. The method for producing a flameproof fiber bundle according to claim 1 , wherein the guide roller has a yarn width regulating mechanism.

前記アクリル系繊維束の単繊維の表面が、円周方向２．０μｍ・繊維軸方向２．０μｍ四方の範囲において、繊維の長手方向に２．０μｍ以上延びる表面凹凸構造を有し、かつ前記単繊維断面の長径／短径の比が１．０１～１．１０である請求項１または２に記載の耐炎化繊維束の製造方法。 The surface of the single fiber of the acrylic fiber bundle has a surface uneven structure extending 2.0 μm or more in the longitudinal direction of the fiber in a range of 2.0 μm in the circumferential direction and 2.0 μm in the fiber axial direction, and 3. The method for producing a flameproof fiber bundle according to claim 1 or 2 , wherein the fiber cross-section has a major axis/minor axis ratio of 1.01 to 1.10.

前記アクリル系繊維束のフックドロップ長が３００ｍｍ以下である請求項１～３のいずれかに記載の耐炎化繊維束の製造方法。 The method for producing a flameproof fiber bundle according to any one of claims 1 to 3 , wherein the acrylic fiber bundle has a hook drop length of 300 mm or less.

前記アクリル系繊維束に付着するシリコン系油剤の付着量が０．１～３．０質量％である請求項１～４のいずれかに記載の耐炎化繊維束の製造方法。 The method for producing a flameproof fiber bundle according to any one of claims 1 to 4 , wherein the adhesion amount of the silicone oil agent adhering to the acrylic fiber bundle is 0.1 to 3.0% by mass.

前記アクリル系繊維束の単繊維繊度が０．０５～０.２２ｔｅｘである請求項１～５のいずれかに記載の耐炎化繊維束の製造方法。 The method for producing a flameproof fiber bundle according to any one of claims 1 to 5 , wherein the acrylic fiber bundle has a single fiber fineness of 0.05 to 0.22 tex.

請求項１～６のいずれかに記載の耐炎化繊維束の製造方法で製造された耐炎化繊維束を、不活性雰囲気中最高温度３００～１，０００℃で前炭素化処理して前炭素化繊維束を製造し、該前炭素化繊維束を不活性雰囲気中最高温度１０００～２０００℃で炭素化処理する炭素繊維束の製造方法。 The flameproof fiber bundle produced by the method for producing a flameproof fiber bundle according to any one of claims 1 to 6 is precarbonized by precarbonization at a maximum temperature of 300 to 1,000°C in an inert atmosphere. A method for producing a carbon fiber bundle, comprising producing a fiber bundle and carbonizing the pre-carbonized fiber bundle at a maximum temperature of 1000 to 2000° C. in an inert atmosphere.