JPH0331822B2 - - Google Patents
Info
- Publication number
- JPH0331822B2 JPH0331822B2 JP58111501A JP11150183A JPH0331822B2 JP H0331822 B2 JPH0331822 B2 JP H0331822B2 JP 58111501 A JP58111501 A JP 58111501A JP 11150183 A JP11150183 A JP 11150183A JP H0331822 B2 JPH0331822 B2 JP H0331822B2
- Authority
- JP
- Japan
- Prior art keywords
- tension
- roll
- fiber
- fiber bundle
- fiber bundles
- 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 claims description 82
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- APWRZPQBPCAXFP-UHFFFAOYSA-N 1-(1-oxo-2H-isoquinolin-5-yl)-5-(trifluoromethyl)-N-[2-(trifluoromethyl)pyridin-4-yl]pyrazole-4-carboxamide Chemical compound O=C1NC=CC2=C(C=CC=C12)N1N=CC(=C1C(F)(F)F)C(=O)NC1=CC(=NC=C1)C(F)(F)F APWRZPQBPCAXFP-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005007 epoxy-phenolic resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Reinforced Plastic Materials (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
【発明の詳細な説明】
本発明は一方向引揃え繊維プリプレグの新規な
製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel method for producing unidirectionally aligned fiber prepregs.
現在、炭素繊維、ガラス繊維或は全芳香族ポリ
アミド繊維等の一方向引揃え繊維シートに、エポ
キシ樹脂、フエノール樹脂、不飽和ポリエステル
樹脂等の熱硬化性樹脂をマトリツクスとして含浸
した、いわゆる一方向引揃えプリプレグが複合材
料の中間素材として広く利用されている。この様
なプリプレグは多数本の繊維束を均一な間隔で並
べ、繊維束間にすき間のない状態まで繊維束を開
繊しシート状とした後、樹脂を含浸させ製造され
るのが一般的である。 Currently, unidirectionally aligned fiber sheets such as carbon fibers, glass fibers, or fully aromatic polyamide fibers are impregnated with thermosetting resins such as epoxy resins, phenolic resins, and unsaturated polyester resins as a matrix. Aligned prepreg is widely used as an intermediate material for composite materials. This type of prepreg is generally manufactured by arranging a large number of fiber bundles at uniform intervals, opening the fiber bundles until there are no gaps between the fiber bundles, forming a sheet, and then impregnating it with resin. be.
この一方向引揃えプリプレグの特徴のひとつ
は、繊維が織布の様に大きく湾曲することなく平
行に引揃えられているため、繊維の有する強度、
弾性率等を効率よく発揮させた複合材料が得られ
ることである。 One of the characteristics of this unidirectionally aligned prepreg is that the fibers are aligned in parallel without being greatly curved like in woven fabrics, so the strength of the fibers is
A composite material that efficiently exhibits elastic modulus etc. can be obtained.
このような一方向引揃えプリプレグを製造する
場合に使用される繊維束本数は、製造するプリプ
レグの厚さ或は幅、或は使用する繊維束の太さ或
はフイラメント数によつて決定されるが極めて多
本数にのぼる。たとえば厚さ0.1〜0.15mmで幅1m
のプリプレグを製造する際に使用する繊維束は
150本〜400本にもなる。この様に多数の繊維束を
各繊維束間で張力を均一にし、引揃えることは極
めてむずかしいことであるが、その張力が不均一
であつた場合張力のゆるい繊維束はたるみを生じ
繊維に蛇行や乱れが発生する。又、張力が強い繊
維束はひきつけ現象をおこし、プリプレグの外観
を著しくきたないものとする。又、この様なプリ
プレグを使用した成形物は外観に繊維の乱れが発
生し、商品価値を低下させるばかりでなく、弾性
率或は強度が所期の値よりも低く、かつばらつき
の大きいものとなる。 The number of fiber bundles used when manufacturing such a unidirectionally aligned prepreg is determined by the thickness or width of the prepreg to be manufactured, the thickness of the fiber bundle used, or the number of filaments. are extremely numerous. For example, thickness 0.1~0.15mm and width 1m
The fiber bundle used to manufacture prepreg is
There can be as many as 150 to 400 pieces. It is extremely difficult to align a large number of fiber bundles by making the tension uniform between each fiber bundle, but if the tension is uneven, the fiber bundles with loose tension will become slack and the fibers will meander. or disturbances occur. In addition, a fiber bundle with strong tension causes a attracting phenomenon, which significantly deteriorates the appearance of the prepreg. In addition, molded products using such prepregs not only have a disordered appearance of fibers, which reduces the product value, but also have elastic modulus or strength lower than the expected value and with large variations. Become.
従来、多数本の繊維束の引揃えの際の張力の均
一化のための検討は数多くなされている。たとえ
ば繊維束が巻かれたボビンを引き出す際のシヤフ
トにバンドブレーキ等のブレーキ装置を取付け、
１本１本引き出し張力が一定となる様にブレーキ
装置を調整する方法があるが、数百本の繊維束の
張力を１本１本調整するには手間がかかり、さら
に繊維束ボビンの外層と内層ではその径の変化に
より経時的に張力が変化するため調整することは
ほとんど不可能に近い。又繊維束１本１本にダン
シングバー或はロールを取付け、さらにパウダー
ブレーキ或は特殊なブレーキ装置により、電気的
に張力制御を行うことは可能であるが、この装置
を数百本に対して設置するには大きな空間と大き
な費用を要する。 Conventionally, many studies have been made to equalize the tension when aligning a large number of fiber bundles. For example, a braking device such as a band brake is installed on the shaft when pulling out a bobbin with a fiber bundle wound around it.
There is a method to adjust the brake device so that the tension of each fiber bundle remains constant when pulling out each fiber bundle, but it is time-consuming to adjust the tension of hundreds of fiber bundles one by one, and it is difficult to adjust the tension of each fiber bundle to the outer layer of the fiber bundle bobbin. In the inner layer, the tension changes over time due to changes in its diameter, so it is almost impossible to adjust it. It is also possible to attach a dancing bar or roll to each fiber bundle and control the tension electrically using a powder brake or a special brake device, but this device cannot be used for hundreds of fiber bundles. Installation requires a large amount of space and costs a lot of money.
本発明者らは上記欠点の解決を目的として種種
検討の結果本発明に到達したものである。 The present inventors have arrived at the present invention as a result of various studies aimed at solving the above-mentioned drawbacks.
すなわち本発明の要旨とするところは、多数本
の繊維束を並べ、ニツプロールでニツプしながら
引取り、一方向引揃え繊維シートを製造するに際
して、送り出しニツプロールと引張りロールとの
周速の差を0.5〜２％として且つニツプ圧を調整
することによりニツプロールと繊維束のスリツプ
を行わせて、トウ間張力を調整しながら繊維シー
トを製造することにある。 That is, the gist of the present invention is to arrange a large number of fiber bundles and take them off while nipping them with a nip roll to produce a unidirectionally aligned fiber sheet. -2% and by adjusting the nip pressure, the nip roll and the fiber bundle slip, and the fiber sheet is manufactured while adjusting the tension between the tows.
以下本発明法を図面により詳細に説明する。 The method of the present invention will be explained in detail below with reference to the drawings.
第１図は本発明法の実施に使用される一方向引
揃え繊維シートの製造装置の一例の配置図であ
り、繊維束群１は一定の間隔に引揃えるためのコ
ーム２を通り、送り込みロール３に導入され、さ
らに適当な長さＬを走行した後、繊維束群全体に
張力Ｔがかかる様に調整されたダンサーロール等
の張力調整装置４を通過させ開繊装置５によりシ
ート状に開繊し、引張ロール６により樹脂含浸装
置等に供給されるものである。なお樹脂含浸装置
は開繊装置と引張ロールの間にあつてもさしつか
えないし、又張力調整装置は引張ロールと送り込
みロールの間であれば本発明法の効果に影響する
ものではない。 FIG. 1 is a layout diagram of an example of an apparatus for manufacturing a unidirectionally aligned fiber sheet used in carrying out the method of the present invention, in which a group of fiber bundles 1 pass through a comb 2 for aligning them at regular intervals, and then pass through a feeding roll. 3, and after traveling a suitable length L, the fiber bundles are passed through a tension adjustment device 4 such as a dancer roll, which is adjusted so that a tension T is applied to the entire fiber bundle group, and opened into a sheet by a fiber opening device 5. The fibers are then fed to a resin impregnation device or the like by a tension roll 6. Note that the resin impregnating device may be placed between the opening device and the tension roll, and the tension adjusting device may be placed between the tension roll and the feeding roll without affecting the effectiveness of the method of the present invention.
本発明法は、上述した装置の特に送り込みロー
ル３で繊維束をそれぞれにスリツプさせることに
より各繊維束の張力を均一化することに特徴があ
る。第２図はその機構を理解するための説明図で
ある。ｎ本の繊維束群にかかる張力をＴ、各繊維
束にそれぞれかかる張力をt1，t2，t3……tnとす
れば、張力Ｔは装置に組込まれた張力制御装置に
よりいつも一定に保つことが出来るのでt1，t2，
t3……tnの平均値はＴ／ｎでたえず一定である
が、ニツプロールで繊維束のスリツプがない場合
にはt1，t2，t3……tnはかならずしも一定ではな
い。たとえばこの装置の運転開始時即ち引張ロー
ル及び送り出しロールのニツプを開始するときに
t1，t2，t3……tnを均一にしてニツプすることは
不可能に近いし、不均一のまま運転すればそのま
まの不均一な状態が続く。又、走行中においても
送り込みロールから送りだされる繊維束の長さは
それぞれ微妙に変化し、たとえば送り込みロール
に導入される繊維束が棒状であるか、平面状であ
るかにより、或は繊維束は多少のクリンプを有し
ているのが普通であるから、その程度により送り
込みロールからの送り出される繊維束の長さはそ
れぞれ微妙な差が発生し、送り出された繊維間の
張力は均一にはならない。 The method of the present invention is characterized in that the tension of each fiber bundle is made uniform by slipping the fiber bundles individually using the feed roll 3 of the above-mentioned apparatus. FIG. 2 is an explanatory diagram for understanding the mechanism. If the tension applied to a group of n fiber bundles is T, and the tension applied to each fiber bundle is t 1 , t 2 , t 3 ...tn, then the tension T is always kept constant by the tension control device built into the device. Since it is possible to maintain t 1 , t 2 ,
The average value of t 3 ...tn is always constant at T/n, but when there is no slip in the fiber bundle in the nip roll, t 1 , t 2 , t 3 ...tn are not necessarily constant. For example, at the start of operation of this equipment, i.e. when starting the nip of the tension roll and delivery roll.
t 1 , t 2 , t 3 ... It is almost impossible to nip with uniform tn, and if the operation is continued with non-uniformity, the non-uniform state will continue. Furthermore, even during running, the length of the fiber bundle sent out from the feed roll changes slightly, depending on whether the fiber bundle introduced into the feed roll is rod-shaped or flat, or the length of the fiber bundle changes slightly. It is normal for bundles to have some crimp, so depending on the degree of crimp, there will be slight differences in the length of the fiber bundle sent out from the feed roll, and the tension between the delivered fibers will be uniform. Must not be.
ところが本発明法での上記ニツプロールで繊維
束を適度にスリツプさせるとこれらの張力の不均
一が均一化されるのである。 However, by appropriately slipping the fiber bundle with the above-mentioned nip roll in the method of the present invention, these non-uniform tensions can be made uniform.
さらに詳しく説明を加えれば、第１図に示す張
力ロール６では繊維束群のスリツプがおこらない
様にニツプ圧を充分に取り、送り込みロールはニ
ツプ圧を小さくとり、適当にスリツプをさせる。
すなわち張力ロールの周速に対して送り込みロー
ルの周速を遅くするわけである。もちろんこの間
張力制御装置は正常に作動し全張力Ｔを維持して
いる。さらにこのスリツプを繊維束１本１本につ
いて説明すれば、スリツプの大きさは繊維束にか
かる張力ｔに比例するから張力のゆるんだ繊維束
はスリツプが少なく、すなわち送り込みロールか
らの送り込み量は少なく、だんだんゆるみは少な
くなり、ついには他の繊維束と同じ張力になる。
又、張力のかかりすぎた繊維束は他の繊維束に比
較しスリツプの度合は大きくなり張力は低下し、
ついには他の繊維束と同り張力となる。即ち繊維
束の平均張力Ｔ／ｎよりも大きく張力がかかつた
繊維束はスリツプ度合が大きくなりＴ／ｎにかぎ
りなく近ずこうとし、逆にＴ／ｎより小さい張力
の繊維束はスリツプ度合が少なくなり、やがて
Ｔ／ｎに近ずき繊維束同志がたがいに張力の均一
化の方向にスリツプし合うわけである。この作用
は多数本引揃え繊維束の張力の均一化におどろく
べき効果を発揮する。たとえば前述したように数
百本の繊維束を張力が不均一なまま、実際には均
一化しようとしても不可能であるが、張力ロー
ル、送り込みロールをニツプし走行を開始する
と、始めは不均一な繊維束が多く、半数程度がた
るんだ状態にあるが適度なスリツプを与えると、
少しずつ均一化し、やがて全繊維束が一平面とな
るまで均一化が進む。又、このスリツプは全張力
Ｔと送り込みロールの圧力を調整することにより
任意に調整出来る。しかしながら一般に全張力Ｔ
は、本装置の中の開繊工程に必要とする張力から
決定されることが多く、実質的にはスリツプの調
整は送り出しロールのニツプ圧で調整することと
なる。 To explain in more detail, the tension roll 6 shown in FIG. 1 provides sufficient nip pressure to prevent the fiber bundles from slipping, and the feed roll provides a small nip pressure to cause the fiber bundles to slip appropriately.
In other words, the peripheral speed of the feed roll is made slower than the peripheral speed of the tension roll. Of course, during this time, the tension control device operates normally and maintains the full tension T. Furthermore, if we explain this slip for each fiber bundle, the size of the slip is proportional to the tension t applied to the fiber bundle, so a fiber bundle with loose tension has less slip, that is, the amount of feed from the feed roll is less. , the slack gradually decreases until the tension becomes the same as that of the other fiber bundles.
In addition, fiber bundles with too much tension will have a greater degree of slip than other fiber bundles, and the tension will decrease.
Eventually, it will be under tension like other fiber bundles. In other words, a fiber bundle with a tension greater than the average tension T/n of the fiber bundle will have a higher slip degree and will approach T/n as much as possible, while a fiber bundle with a tension smaller than T/n will have a slip degree. decreases, and eventually approaches T/n, and the fiber bundles slip toward each other in the direction of equalizing the tension. This action exhibits a surprising effect in equalizing the tension of a large number of aligned fiber bundles. For example, as mentioned above, it is actually impossible to make hundreds of fiber bundles with uneven tension evenly, but when you nip the tension roll and feed roll and start running, the tension will be uneven at the beginning. There are many fiber bundles, and about half of them are loose, but if you give them a suitable slip,
The fibers become uniform little by little until all the fiber bundles are on one plane. Further, this slip can be arbitrarily adjusted by adjusting the total tension T and the pressure of the feed roll. However, generally the total tension T
is often determined from the tension required for the opening process in this device, and the slip is essentially adjusted by the nip pressure of the delivery roll.
本発明者等の詳細な検討の結果、このスリツプ
の度合、即ち送り出しロールと張力ロールの周速
の差は0.5％〜２で多くの場合は0.5％〜１％で充
分であつた。 As a result of detailed studies by the present inventors, it was determined that the degree of slip, that is, the difference in peripheral speed between the delivery roll and the tension roll, is 0.5% to 2, and in most cases, 0.5% to 1% is sufficient.
以上の様に本発明法は、ニツプロールの組合せ
と、ニツプロールと繊維束のスリツプを利用し
て、多数本の繊維束を均一な張力に引揃えという
困難な問題を比較的簡単な装置で経済的にかつ効
果的に解決した。又、この方法により製造した引
揃え繊維束シートで製造した一方向引揃えプリプ
レグは、前述した繊維の蛇行や乱れのない高品質
なものであつた。 As described above, the method of the present invention utilizes the combination of nip rolls and the slip of the nip rolls and fiber bundles to solve the difficult problem of aligning a large number of fiber bundles with uniform tension using a relatively simple device and economically. resolved quickly and effectively. Further, the unidirectionally aligned prepreg produced from the aligned fiber bundle sheet produced by this method was of high quality without the above-mentioned meandering or disorder of the fibers.
以下実施例により本発明を具体的に説明する。 The present invention will be specifically explained below using Examples.
実施例
6000フイラメントからなる炭素繊維束158本を
供糸速度100m／時間で供糸し、幅が505mmになる
様にコームで幅を規制し、送り出しロールに供給
した。一方送り出しロールと張力ロールの間での
張力は120Kgになる様に張力制御装置を調整した。
まず送り出しロールのニツプ圧を線圧で0.77Kg／
cmで走行させたところ、走行開始直後は張力がバ
ラバラで送り出しロールと張力制御装置の間でた
るみのある炭素繊維束が均半数あつたが、走行開
始後６分でたるみはなくなり、きれいな平面状の
引揃えシートとして張力ロールを通過した。又、
本実施例では張力ロールに入る前で、厚さ70μの
エポキシ樹脂をコーテイングした離型紙を引揃え
炭素繊維束に合体し引張ロールに引続き設置した
加熱ニツプロールで樹脂を含浸しプリプレグとし
た。このプリプレグは繊維のたるみによる蛇行も
乱れもなかつた。Example 158 carbon fiber bundles consisting of 6000 filaments were fed at a feeding speed of 100 m/hour, the width was regulated with a comb so that the width was 505 mm, and the fibers were fed to a delivery roll. On the other hand, the tension control device was adjusted so that the tension between the delivery roll and the tension roll was 120 kg.
First, the nip pressure of the delivery roll is 0.77Kg/linear pressure.
When running at a speed of cm, the tension was uneven immediately after the start of running, and half of the carbon fiber bundles were sagging between the delivery roll and the tension control device, but the slack disappeared and a clean flat surface was formed 6 minutes after the start of running. The sheet was passed through a tension roll as an aligned sheet. or,
In this example, before entering the tension roll, a release paper coated with epoxy resin with a thickness of 70 μm was pulled together and combined into a carbon fiber bundle, and impregnated with resin using a heated nip roll placed next to the tension roll to form a prepreg. This prepreg had no meandering or disorder due to slack fibers.
次に比較例として、送り出しロールのニツプ圧
を3.2Kg／cmとしその他の条件はすべて実施例と
同一として走行させた。走行開始直後のたるみの
ある繊維束は１時間以上の走行後も均一な張力に
はならず、これで製造したプリプレグは繊維の蛇
行、乱れが著しく、製品にはならなかつた。 Next, as a comparative example, running was carried out with the nip pressure of the delivery roll being 3.2 kg/cm and all other conditions being the same as in the example. The fiber bundle, which was sagging immediately after the start of running, did not have uniform tension even after running for more than 1 hour, and the prepreg produced with this had significant meandering and disorder of the fibers, and could not be used as a product.
第１図、本発明法の実施に使用される引揃え繊
維シートの製造装置の一例の配置図。
１……繊維束供糸装置、２……コーム、３……
送り出しニツプロール、４……張力制御装置、５
……開繊装置、６……引張ロール。
第２図、本発明法のニツプロールでのスリツプ
機構の説明図。
Ｔ……繊維束群全体にかかる張力、t1，t2，t3
…tn……繊維束１本１本にかかる張力。
FIG. 1 is a layout diagram of an example of an apparatus for producing aligned fiber sheets used in carrying out the method of the present invention. 1...Fiber bundle yarn offering device, 2...Comb, 3...
Delivery nip roll, 4...Tension control device, 5
...Fiber opening device, 6...Tension roll. FIG. 2 is an explanatory diagram of the slip mechanism in the nip roll according to the present invention. T...Tension applied to the entire fiber bundle group, t 1 , t 2 , t 3
...tn...Tension applied to each fiber bundle.
Claims (1)
プしながら引取り、一方向引揃え繊維シートを製
造するに際して、送り出しニツプロールと引張り
ロールの周速の差を、0.5〜２％として且つニツ
プ圧を調整することによりニツプロールと繊維束
のスリツプを行わせて、トウ間張力を調整するこ
とを特徴とする繊維シートの製造法。1. When manufacturing a unidirectionally aligned fiber sheet by arranging a large number of fiber bundles and pulling them while nipping them with a nip roll, the difference in peripheral speed between the delivery nip roll and the tension roll is set to 0.5 to 2%, and the nip pressure is adjusted. A method for manufacturing a fiber sheet, characterized in that the tension between the tows is adjusted by slipping the nip roll and the fiber bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58111501A JPS609962A (en) | 1983-06-21 | 1983-06-21 | Production of fiber sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58111501A JPS609962A (en) | 1983-06-21 | 1983-06-21 | Production of fiber sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS609962A JPS609962A (en) | 1985-01-19 |
| JPH0331822B2 true JPH0331822B2 (en) | 1991-05-08 |
Family
ID=14562893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58111501A Granted JPS609962A (en) | 1983-06-21 | 1983-06-21 | Production of fiber sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609962A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2653493A4 (en) * | 2010-12-13 | 2017-05-03 | Toray Industries, Inc. | Carbon fiber prepreg, method for producing same and carbon fiber reinforced composite material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59228036A (en) * | 1983-06-10 | 1984-12-21 | 三菱レイヨン株式会社 | Width enlarging method of fiber bundle |
-
1983
- 1983-06-21 JP JP58111501A patent/JPS609962A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59228036A (en) * | 1983-06-10 | 1984-12-21 | 三菱レイヨン株式会社 | Width enlarging method of fiber bundle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS609962A (en) | 1985-01-19 |
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