JPH04343746A - Production of sheet-formed aggregate of short fiber - Google Patents
Production of sheet-formed aggregate of short fiberInfo
- Publication number
- JPH04343746A JPH04343746A JP3109260A JP10926091A JPH04343746A JP H04343746 A JPH04343746 A JP H04343746A JP 3109260 A JP3109260 A JP 3109260A JP 10926091 A JP10926091 A JP 10926091A JP H04343746 A JPH04343746 A JP H04343746A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- short
- fiber
- short fibers
- fiber bundle
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 18
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 description 7
- 239000007858 starting material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
- Inorganic Fibers (AREA)
- Nonwoven Fabrics (AREA)
- Inert Electrodes (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、シート状短繊維集合体
の製造方法に関する。さらに詳しくは、均一な原料を均
一な密度で供給し、切断し、該切断された繊維を過剰に
貯溜することなく分散し、短距離にて捕集し、該短繊維
の集積状態がシート幅方向及び長手方向共に均一でかつ
、地合の均一性に優れたシート状短繊維集合体の製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sheet-like short fiber aggregate. More specifically, a uniform raw material is supplied and cut at a uniform density, the cut fibers are dispersed without excessive accumulation, and collected over a short distance, and the accumulation state of the short fibers is adjusted to the width of the sheet. The present invention relates to a method for producing a sheet-like short fiber aggregate that is uniform in both direction and length and has excellent uniformity of texture.
【0002】0002
【従来の技術】従来のシート状短繊維集合体を得る方法
は、いずれも予め準備された短繊維塊から出発し、これ
を分散してシート化するものであるから、供給量を一定
になし得ず、したがって均一シートを得ることは原理的
に極めてむずかしいという欠点があった。[Prior Art] All conventional methods for obtaining sheet-like short fiber aggregates start from a short fiber mass prepared in advance and disperse it to form a sheet, so the amount of supply cannot be kept constant. Therefore, it is extremely difficult in principle to obtain a uniform sheet.
【0003】0003
【発明が解決しようとする課題】本発明は、短繊維が全
体に均一に分散されて集積したシート状短繊維集合体を
得るための製造方法を提供せんとするものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a manufacturing method for obtaining a sheet-like short fiber aggregate in which short fibers are uniformly dispersed throughout.
【0004】0004
【課題を解決するための手段】本発明は、上述課題を解
決するために、次のような手段を採用する。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention employs the following means.
【0005】すなわち、本発明のシート状短繊維集合体
の製造方法は、複数本以上の長繊維束を実質的に等間隔
に配列しつつ供給し、該繊維束を切断するとともに短繊
維に分散し、次いで捕集面に該繊維を順次捕集すること
を特徴とするものである。That is, the method for producing a sheet-like short fiber aggregate of the present invention involves supplying a plurality or more long fiber bundles while arranging them at substantially equal intervals, cutting the fiber bundles, and dispersing them into short fibers. The method is characterized in that the fibers are then sequentially collected on a collecting surface.
【0006】[0006]
【作用】本発明の出発原料である長繊維束1本の繊度は
、50〜50000デニールの範囲であって、50デニ
ール未満は生産性の面で、一方、50000デニールを
越えてはカット性に悪い影響を与えるので好ましくない
。[Function] The fineness of one long fiber bundle, which is the starting material of the present invention, is in the range of 50 to 50,000 deniers. Less than 50 deniers is a problem in terms of productivity, while a fineness exceeding 50,000 deniers is poor in cuttability. It is not desirable because it has a bad influence.
【0007】該長繊維束を実質的に等間隔に配列するに
は、櫛状、目玉状、溝付、仕切り板等の案内部材を用い
るのが好ましい。[0007] In order to arrange the long fiber bundles at substantially equal intervals, it is preferable to use a guide member such as a comb-shaped, eyeball-shaped, grooved, partition plate, or the like.
【0008】これらの案内部材は、シートの長手方向と
幅方向の短繊維集積状態の均一性を、それぞれ確保でき
るように該短繊維に作用する。[0008] These guide members act on the short fibers so as to ensure uniformity in the state of accumulation of the short fibers in the longitudinal direction and the width direction of the sheet.
【0009】次に、該繊維束は、切断装置により切断さ
れるものであるが、切断装置としてはコーミングローラ
が、切断された繊維を貯溜することなく、かつ、開繊作
用を伴ないながら系外へ排出する点で特に好ましい。該
コーミングローラに供給する長繊維束は、剛直性はある
が脆い繊維が好ましく、たとえば炭素繊維(黒鉛繊維を
含む)は好適な素材である。Next, the fiber bundle is cut by a cutting device, and a combing roller is used as the cutting device to cut the fiber bundle without accumulating the cut fibers and with an opening action. It is particularly preferable in terms of being discharged to the outside. The long fiber bundle supplied to the combing roller is preferably a rigid but brittle fiber, and carbon fiber (including graphite fiber) is a suitable material, for example.
【0010】次に、切断系外に排出された切断された短
繊維は、前記長繊維束が等間隔に配列した束間距離をι
、該束配列幅をι′とするならば、前記切断装置の切断
点から捕集面の距離Lは、ι以上ι′以下とすることに
より、前記繊維束の供給線密度がさらに均一化される方
向に作用するので好ましい。つまり、これによりシート
幅方向の短繊維集積状態の均一性が一段と向上すること
になる。さらにシートに特に重要な地合の均一性にもき
わめて有効に作用するものである。[0010] Next, the cut short fibers discharged outside the cutting system are separated by a distance ι between the long fiber bundles arranged at equal intervals.
, if the bundle arrangement width is ι', then the distance L from the cutting point of the cutting device to the collection surface is set to be greater than or equal to ι and less than or equal to ι', thereby making the supply linear density of the fiber bundles more uniform. This is preferable because it acts in the direction of In other words, this further improves the uniformity of the short fiber accumulation state in the sheet width direction. Furthermore, it has an extremely effective effect on the uniformity of the formation, which is particularly important for sheets.
【0011】本発明は、上述のように長繊維束を等間隔
に配列させて供給し、さらに切断後の短繊維を特定距離
内で捕集することで、短繊維集積状態を均一に維持する
ことができたものである。さらに好ましくは、捕集幅が
、長繊維束の供給幅(長繊維束配列幅:ι′)とほぼ同
じであるのがよい。捕集幅が、供給幅より大きすぎても
小さすぎても均一な捕集性が達成されにくくなる。さら
に具体的に捕集幅を決定するには次のようにする。[0011] The present invention maintains a uniform short fiber accumulation state by supplying long fiber bundles arranged at equal intervals as described above, and collecting short fibers after cutting within a specific distance. I was able to do that. More preferably, the collection width is approximately the same as the supply width of the long fiber bundle (long fiber bundle arrangement width: ι'). If the collection width is either larger or smaller than the supply width, it will be difficult to achieve uniform collection performance. More specifically, the collection width can be determined as follows.
【0012】すなわち、長繊維束の本数をn、捕集幅を
W、長繊維束が等間隔に配置された繊維束間距離をι、
該繊維束配列幅ι′とすると、
ι′=(n−1)ι
よって、W=n・ι=(ι′+ι)
好ましい捕集幅の範囲は
0.5(ι′+ι)<W<2.0(ι′+ι)さらに好
ましくは
0.8(ι′+ι)<W<1.2(ι′+ι)最も好ま
しくは、W=(ι′+ι)である。That is, the number of long fiber bundles is n, the collection width is W, and the distance between the fiber bundles where the long fiber bundles are arranged at equal intervals is ι.
Assuming the fiber bundle arrangement width ι', ι'=(n-1)ι Therefore, W=n・ι=(ι'+ι) The preferable collection width range is 0.5(ι'+ι)<W<2.0(ι'+ι) More preferably 0.8(ι'+ι)<W<1.2(ι'+ι) Most preferably W=(ι'+ι).
【0013】上述範囲より小さい捕集幅となると、シー
ト耳部の坪量が多くなる点と合せ、短繊維の分散域で二
次凝集が起きる傾向があり、また上述範囲より広幅とな
ると、耳部近傍の坪量が少なくなり、幅方向の均一なシ
ートを形成することができにくくなる。なお、捕集に際
しては、両耳部近傍に側壁を設けると、耳部近傍での問
題を緩和させることができるので好ましい。When the collection width is smaller than the above range, secondary aggregation tends to occur in the dispersion area of short fibers in addition to the fact that the basis weight of the sheet edge increases. The basis weight near the area decreases, making it difficult to form a sheet that is uniform in the width direction. In addition, when collecting, it is preferable to provide side walls near both ears, since this can alleviate problems near the ears.
【0014】また、上述の方法によって短繊維を集積さ
せる際に、長繊維束の供給速度ならびに捕集面の走行速
度が、それぞれ定速であること、さらにそれらの速度が
連動して作動するシステムを採用するのが、得られるシ
ートの均一性を確保する上から好ましい。[0014] Furthermore, when accumulating short fibers by the above method, the feeding speed of the long fiber bundle and the traveling speed of the collection surface are each constant, and furthermore, a system in which these speeds are operated in conjunction with each other is provided. It is preferable to employ this method in order to ensure the uniformity of the obtained sheet.
【0015】次に、本発明のシート状短繊維集合体を製
造する方法を図を用いて説明する。図1は、本発明のシ
ート状短繊維集合体を得る場合の一実施態様を示す図で
あって、まず、複数本、好ましくは3本以上の長繊維束
1は、これを等間(距離ι)に配列(距離ι′)させる
ためのセパレートガイド2、フィード装置3を経て切断
装置4に供され、切断され、短繊維5を得る。Next, the method for producing the sheet-like short fiber aggregate of the present invention will be explained with reference to the drawings. FIG. 1 is a diagram showing an embodiment of obtaining a sheet-like short fiber aggregate of the present invention. After passing through a separate guide 2 for arranging (distance ι') and a feed device 3, the short fibers are fed to a cutting device 4, where they are cut to obtain short fibers 5.
【0016】該フィード装置3としては、ローラとプレ
ート、ローラとローラ、あるいは、エプロンローラとエ
プロンローラ等いずれの装置であってもよい。The feed device 3 may be any device such as a roller and a plate, a roller and a roller, or an apron roller and an apron roller.
【0017】図1において、ハウジング4′のC点が切
断位置である。In FIG. 1, point C of the housing 4' is the cutting position.
【0018】切断された短繊維5はチャンバ6内で分散
し、前記切断位置(C点より)よりι以上ι′以下の距
離(L)を隔てて走行する捕集ネット7に捕集され、順
次集積させ、シート状短繊維集合体8を得る。9、10
は捕集ネットの駆動装置を示す。The cut short fibers 5 are dispersed in the chamber 6 and collected by a collection net 7 running at a distance (L) of ι or more and ι' or less from the cutting position (from point C), The short fibers are accumulated one after another to obtain a sheet-like short fiber aggregate 8. 9, 10
indicates the drive device for the collection net.
【0019】図2は、図1の長繊維束1が等間隔(距離
ι)に配列(距離ι′)されつつ、フィード装置3およ
び切断装置4に供給される状態を示す。FIG. 2 shows a state in which the long fiber bundles 1 of FIG. 1 are arranged at equal intervals (distance ι) (distance ι') and are supplied to the feed device 3 and the cutting device 4.
【0020】図中X−X′は、切断装置4の軸線方向を
示す。長繊維束1が等間隔に配列されるものが複数個あ
ってもよく、かくすることにより高い生産性が得られる
。In the figure, X-X' indicates the axial direction of the cutting device 4. There may be a plurality of long fiber bundles 1 arranged at equal intervals, and by doing so, high productivity can be obtained.
【0021】[0021]
実施例1
単糸デニールが0.6デニール、構成繊維本数3000
本のポリアクリルニトリル(PAN)系炭素繊維束を2
01本準備し、ι=5mmの間隔で配列し、ι′=10
00mmで切断装置に供給し、L=400mmとし、捕
集幅1020mmで捕集したところ、1本の束の太さの
揃った長繊維束を出発原料としたために、シートの長手
方向の均一性が得られ、かつ該繊維束をシート幅方向に
等間隔に配列させたためにシート幅方向の均一性が得ら
れ、しかも、短繊維に分散させているために地合の均一
性に富んだシート状短繊維集合体が得られた。Example 1 Single yarn denier is 0.6 denier, number of constituent fibers is 3000
2 book polyacrylonitrile (PAN) carbon fiber bundles
Prepare 01 pieces, arrange them at intervals of ι=5mm, and make ι'=10
00 mm, L = 400 mm, and collected with a collection width of 1020 mm. As the starting material was a long fiber bundle with a uniform thickness, the sheet was uniform in the longitudinal direction. The fiber bundles are arranged at equal intervals in the width direction of the sheet, so uniformity in the width direction of the sheet is obtained, and the sheet is highly uniform in texture because it is dispersed into short fibers. A short fiber aggregate was obtained.
【0022】実施例2
単糸デニールが0.6デニール、構成繊維本数2400
0本のPAN系炭素繊維束を21本準備し、ι=50m
m間隔に配列し、ι′=1000mmで切断装置に供給
する系と同じ系を5系列設け、捕集距離L=200mm
とし、捕集幅1050mmで捕集ネットに捕集したとこ
ろ、1本の束の太さの揃った長繊維束を出発原料として
いるため長手方向の均一性がきわめて良好で、該繊維束
を等間隔に配列させたためにシートの幅方向の均一性の
よいものが得られた。さらに、短繊維に分散させている
ために地合の均一性が著しく均整なシート状短繊維集合
体が得られた。Example 2 Single yarn denier is 0.6 denier, number of constituent fibers is 2400
Prepare 21 PAN-based carbon fiber bundles, ι = 50m
Arranged at intervals of m, 5 systems are provided that are the same as the system that supplies the cutting device with ι' = 1000 mm, and the collection distance L = 200 mm.
When collected on a collection net with a collection width of 1050 mm, it was found that the uniformity in the longitudinal direction was extremely good because the starting material was a long fiber bundle with a uniform thickness, and the fiber bundle was collected evenly. Since the sheets were arranged at intervals, good uniformity in the width direction of the sheet was obtained. Furthermore, since the particles were dispersed into short fibers, a sheet-like short fiber aggregate with extremely uniform texture was obtained.
【0023】[0023]
【発明の効果】出発原料を太さの揃った長繊維束を用い
、かつ該繊維束を実質的に等間隔に配列させ、しかも短
繊維に分散させたことにより、
(1) シート長手方向の該短繊維集積状態の均一性(
2) シート幅方向の該短繊維集積状態の均一性(3)
地合の均一性
に優れた性能を発揮するものであり、たとえば燃料電池
電極基材である炭素−炭素(C/c)コンポジット用前
駆体や各種複合材の前駆体として好適に使用でき、特に
極めて高い精度、性能および信頼性が要求される用途で
の基材として有効である。[Effects of the Invention] By using long fiber bundles of uniform thickness as the starting material, arranging the fiber bundles at substantially equal intervals, and dispersing them into short fibers, (1) Uniformity of the short fiber accumulation state (
2) Uniformity of the short fiber accumulation state in the sheet width direction (3)
It exhibits excellent performance with uniform formation, and can be suitably used, for example, as a precursor for carbon-carbon (C/c) composites, which are fuel cell electrode base materials, and as a precursor for various composite materials. It is effective as a base material in applications that require extremely high precision, performance, and reliability.
【図1】 本発明のシート状短繊維集合体を得る場合
の一実施態様を示す概略図である。FIG. 1 is a schematic diagram showing one embodiment of obtaining a sheet-like short fiber aggregate of the present invention.
【図2】 図1の実施態様図のうち長繊維束が等間隔
に配列した状況を示す平面図である。FIG. 2 is a plan view showing a state in which long fiber bundles are arranged at regular intervals in the embodiment diagram of FIG. 1;
1:複数本の長繊維束 2:セパレートガイド 3:フィード装置 4:切断装置 4′:ハウジング 5:短繊維 6:チャンバ 7:捕集ネット 8:捕集ネット駆動装置 9:捕集ネット駆動装置 ι:長繊維束間距離 ι′:長繊維配列幅 c:長繊維束の切断点 L:捕集距離 1: Multiple long fiber bundles 2: Separate guide 3: Feed device 4: Cutting device 4': Housing 5: Short fiber 6: Chamber 7: Collection net 8: Collection net drive device 9: Collection net drive device ι: Distance between long fiber bundles ι′: Long fiber arrangement width c: Cutting point of long fiber bundle L: Collection distance
Claims (5)
隔に配列しつつ供給し、該繊維束を切断するとともに短
繊維に分散し、次いで捕集面に該短繊維を順次捕集する
ことを特徴とするシート状短繊維集合体の製造方法。1. Supplying a plurality of long fiber bundles arranged at substantially equal intervals, cutting the fiber bundles and dispersing them into short fibers, and then sequentially collecting the short fibers on a collection surface. A method for producing a sheet-like short fiber aggregate, characterized in that:
距離以上で該繊維束配列幅以下の距離を隔てた位置を走
行する捕集面に切断された短繊維を捕集することを特徴
とする請求項1記載のシート状短繊維集合体の製造方法
。2. Collecting the cut short fibers on a collection surface running at a distance from the cutting position of the long fiber bundle to a distance greater than or equal to the inter-fiber bundle distance and less than or equal to the fiber bundle arrangement width. The method for producing a sheet-like short fiber aggregate according to claim 1.
走行速度が、連動している請求項1記載のシート状短繊
維集合体の製造方法。3. The method for producing a sheet-like short fiber aggregate according to claim 1, wherein the feeding speed of the long fiber bundle and the traveling speed of the collection surface are linked.
徴とする請求項1記載のシート状短繊維集合体の製造方
法。4. The method for producing a sheet-like short fiber aggregate according to claim 1, wherein the long fiber bundle is carbon fiber.
ローラである請求項1記載のシート状短繊維集合体の製
造方法。5. The method for producing a sheet-like short fiber aggregate according to claim 1, wherein the means for cutting the fiber bundle is a combing roller.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3109260A JP2576710B2 (en) | 1991-05-14 | 1991-05-14 | Method for producing sheet-like carbon short fiber aggregate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3109260A JP2576710B2 (en) | 1991-05-14 | 1991-05-14 | Method for producing sheet-like carbon short fiber aggregate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04343746A true JPH04343746A (en) | 1992-11-30 |
JP2576710B2 JP2576710B2 (en) | 1997-01-29 |
Family
ID=14505669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3109260A Expired - Lifetime JP2576710B2 (en) | 1991-05-14 | 1991-05-14 | Method for producing sheet-like carbon short fiber aggregate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2576710B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010070433A (en) * | 2008-09-22 | 2010-04-02 | Toray Ind Inc | Porous carbon sheet and method for producing the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS633991A (en) * | 1986-06-25 | 1988-01-08 | Nikka Chem Ind Co Ltd | Thermal recording material |
JPH02269812A (en) * | 1989-04-07 | 1990-11-05 | Asahi Chem Ind Co Ltd | Production of short fiber web |
-
1991
- 1991-05-14 JP JP3109260A patent/JP2576710B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS633991A (en) * | 1986-06-25 | 1988-01-08 | Nikka Chem Ind Co Ltd | Thermal recording material |
JPH02269812A (en) * | 1989-04-07 | 1990-11-05 | Asahi Chem Ind Co Ltd | Production of short fiber web |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010070433A (en) * | 2008-09-22 | 2010-04-02 | Toray Ind Inc | Porous carbon sheet and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JP2576710B2 (en) | 1997-01-29 |
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