JPS643961B2 - - Google Patents
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- Publication number
- JPS643961B2 JPS643961B2 JP2544181A JP2544181A JPS643961B2 JP S643961 B2 JPS643961 B2 JP S643961B2 JP 2544181 A JP2544181 A JP 2544181A JP 2544181 A JP2544181 A JP 2544181A JP S643961 B2 JPS643961 B2 JP S643961B2
- Authority
- JP
- Japan
- Prior art keywords
- yarn
- temperature
- present
- stretching
- heat treatment
- 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
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- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 13
- 125000003118 aryl group Chemical group 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 12
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000002074 melt spinning Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 235000003403 Limnocharis flava Nutrition 0.000 description 1
- 244000278243 Limnocharis flava Species 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Landscapes
- Artificial Filaments (AREA)
Description
本発明は芳香族サルフアイド重合体から繊維製
品を製造する方法に関する。芳香族サルフアイド
重合体は、その化学構造からも容易に推定される
ように有機重合体としては抜群の耐熱性と耐薬品
性を誇る化合物であり、主として樹脂状の製品と
して広く市場に供給されている。またこの重合体
は、繊維状の製品としても、例えば耐熱耐火服や
煤煙フイルターの素材として用途が開発されてき
た。しかしながら、従来の芳香族サルフアイド繊
維はその機械特性が一応の水準は満しているもの
の、いわゆる産業用繊維の範ちゆうからすると強
度が一段と低いために、広範な需要の拡大が狭め
られてきたというのが実状である。
本発明者らは、以上の点に鑑み鋭意検討した結
果、本発明に到達したもので、本発明によれば比
較的簡単な装置で効果的に繊維の機械特性を向上
させることが出来るばかりではなく、耐熱性や耐
薬品性のも一層向上させることができる。本発明
は次の構成を有する。
芳香族サルフアイド重合体を溶融紡糸して延伸
するに際して、未延伸糸を該未延伸糸の自然延伸
比以上の倍率で延伸した後、下記の工程Ａ、また
は工程Ｂを行なうことを特徴とする芳香族サルフ
アイド繊維の製造方法。
工程Ａ 温度150〜260℃でかつ前記１段目の延伸
温度以上で定長熱処理する工程。
工程Ｂ 温度150〜260℃でかつ前記１段目の延伸
温度以上であつて、全延伸倍率が前記１段目の
延伸倍率の1.0倍超過から2.0倍の範囲で延伸す
る工程。
本発明にいう芳香族サルフアイド重合体とは、
一般式が（−Ar−Ｓ）−oであらわされる重合体であ
る。ここでArは芳香族の基を意味し、フエニレ
ン基、ビフエニレン基、ビフエニレンエーテル
基、ナフタレン基など、又はそれらのアルキル置
換基、ハロゲン置換基などであることができ、そ
れらの組合せである共重合体や混合体なども本発
明の主旨を逸脱するものでない限り可能とされ
る。
これらの重合体は任意の技術で製造することが
できる。例えば米国特許第3354129号に開示され
た技術にしたがつて、いわゆる非プロトン性極性
溶媒中でアルカリ金属の硫化物と多ハロ置換アリ
ール化合物とを反応させて重合体とすることがで
き、特公昭52−30609に示されたように部分的に
予備硬化して溶融粘度を上昇し製糸工程に供給す
ることができる。しかしながら後者に示された溶
融流れの範囲以外のものでも本発明の主旨を逸脱
しない限り使用が可能である。
本発明の芳香族サルフアイド繊維は通常の溶融
紡糸方法によつて繊維状に形成することができ
る。典型的な方法としては、エクストルーダ型の
押出機を用い、300℃以上で溶融した芳香族サル
フアイド樹脂の異物を過し、口金から大気中に
押出し仕上げ剤を付与したのち巻取る。目的とす
る糸条が太い場合には冷却を強化するため液状の
冷媒中を通すことも可能であり、また糸条が細い
場合には保温筒や加熱筒などの使用も操業性の向
上の面などから有効である。このようにして得ら
れた未延伸糸を延伸工程に供し、供給ロールと引
張ロールの間において自然延伸比以上の倍率で延
伸を行なうが、そのとき熱ピン又は熱板、熱ロー
ラなどによつて未延伸糸条をガラス転移点付近の
温度、好ましくは80〜120℃の範囲に加熱する。
なおここでは紡糸工程と延伸工程が分離された例
を示したが、これらが連続していることも可能で
ある。
本発明によれば、上述のように延伸された糸条
は更に一回以上の延伸工程または定長熱処理工程
に供される。
二段目以降の延伸または定長熱処理は工程の機
械的特性を向上し、糸条の熱特性を改善するた
め、糸条を加熱しながらおこなう。加熱温度は
150から260℃の範囲である。二段延伸する場合
は、全倍率が一段目の倍率の1.0倍超過から2.0倍
でとくに1.0倍超過から1.5倍の間で延伸すると好
ましい特性を有する糸条を製造できる。二段目の
延伸の比率が大きい程、高ヤング率で高強度のも
のが得られるが、実用的な伸度を与えるためには
全倍率は一段目の倍率の2.0倍以下であることが
必要でである。また定長熱処理することも有効で
ある。定長熱処理つまり緊張熱処理は、延伸せず
に熱処理することであるが、かかる定長熱処理に
よつても驚くことに強度、弾性率共に向上する。
なお、弛緩熱処理の場合は、糸の耐熱性は向上
するが、本発明の意図する高強度、高弾性率の繊
維が得られない。
本発明による糸条は従来の方法による糸条に比
べ約１ｇ／ｄの強度の向上と10ｇ／ｄ以上のヤン
グ率の向上が達成される。一方同時に収縮率も低
下することも明らかとなり、種々の高次処理に好
ましい収縮率の繊維とすることができる。
更に本発明の糸条は、従来のものに比べて大幅
な密度、複屈折の増加を示し、繊維の内部構造が
より完成された方向に変化している。本発明の糸
条は芳香族サルフアイド重合体が固有に持つてい
る耐熱、耐薬品特性を更に高度に示す。
本発明と同様の効果は一段のみの延伸では得る
ことが出来ない。一段で高倍率に延伸しようとす
ると、糸条が破断する。
以下実施例に基づいて本発明を具体的に説明す
る。
実施例 １
あらかじめ増粘し、300℃で剪断速度が
200sec-1の条件で測定した粘度が3500ポイズであ
るポリフエニレンサルフアイド重合体をペレツト
状に加工し、滑剤とともにエクストルーダー型押
出機に供給する。このペレツトをASTM−Ｄ−
1238−70で350℃５Kgの荷重でメルトフローを測
定したところ70であつた。330℃の温度でこの重
合体を溶融混練後、0.23mm直径の細孔を18個有す
る口金から１分間5.3ｇの割合で吐出し、空気中
で冷却固化してから仕上剤を付与し１分間800ｍ
の割合で巻取つた。この未延伸糸条の自然延伸比
は1.4倍であり、1.3ｇ／ｄの強度と200％の伸度
を有していた。
この未延伸糸を表面温度が98℃の熱ピンを用い
て2.0倍に延伸し、更に180℃に保つた熱板上で全
倍率が2.5倍となるように二段目の延伸をおこな
つた。このときに得られた糸質を第１表に示す。
The present invention relates to a method for producing textile products from aromatic sulfide polymers. As can be easily deduced from its chemical structure, aromatic sulfide polymers are compounds that boast outstanding heat resistance and chemical resistance for organic polymers, and are widely supplied to the market mainly as resin-like products. There is. This polymer has also been developed for use as a fibrous product, for example, as a material for heat-resistant and fire-resistant clothing and soot filters. However, although the mechanical properties of conventional aromatic sulfide fibers meet certain standards, their strength is much lower than that of so-called industrial fibers, which has limited the expansion of widespread demand. That is the reality. The present inventors have arrived at the present invention as a result of intensive studies in view of the above points.According to the present invention, it is possible to effectively improve the mechanical properties of fibers with a relatively simple device. In addition, heat resistance and chemical resistance can be further improved. The present invention has the following configuration. An aromatic product characterized in that when melt-spinning and drawing an aromatic sulfide polymer, the following step A or step B is performed after drawing the undrawn yarn at a magnification equal to or higher than the natural drawing ratio of the undrawn yarn. A method for producing group sulfide fiber. Step A: A step of constant length heat treatment at a temperature of 150 to 260° C. and above the first-stage stretching temperature. Step B: A step of stretching at a temperature of 150 to 260° C. and above the first-stage stretching temperature, with a total stretching ratio in the range of 1.0 times to 2.0 times the first-stage stretching ratio. The aromatic sulfide polymer referred to in the present invention is
It is a polymer whose general formula is (-Ar-S) -o . Here, Ar means an aromatic group, which can be a phenylene group, a biphenylene group, a biphenylene ether group, a naphthalene group, etc., or an alkyl substituent thereof, a halogen substituent, etc., or a combination thereof. Copolymers and mixtures are also possible as long as they do not depart from the spirit of the present invention. These polymers can be made by any technique. For example, according to the technique disclosed in U.S. Pat. 52-30609, it can be partially precured to increase the melt viscosity and then fed to the spinning process. However, melt flow ranges other than those shown in the latter can also be used as long as they do not depart from the spirit of the present invention. The aromatic sulfide fiber of the present invention can be formed into a fibrous form by a conventional melt spinning method. A typical method is to use an extruder type extruder to pass through the aromatic sulfide resin foreign matter melted at 300°C or higher, extrude it into the atmosphere from a die, apply a finishing agent, and then wind it up. If the target yarn is thick, it is possible to pass it through a liquid refrigerant to strengthen cooling, and if the yarn is thin, the use of a heat insulating tube or heating tube can also improve operability. It is effective because of The undrawn yarn thus obtained is subjected to a drawing process, and drawn between a supply roll and a tension roll at a ratio higher than the natural drawing ratio. The undrawn yarn is heated to a temperature near the glass transition point, preferably in the range of 80 to 120°C.
Although an example in which the spinning process and the stretching process are separated is shown here, it is also possible that they are continuous. According to the present invention, the yarn drawn as described above is further subjected to one or more drawing steps or fixed length heat treatment steps. The second and subsequent drawing or constant length heat treatments are performed while heating the yarn in order to improve the mechanical properties of the process and the thermal properties of the yarn. The heating temperature is
The temperature ranges from 150 to 260℃. In the case of two-stage drawing, a yarn with preferable characteristics can be produced by stretching at a total magnification of 1.0 times to 2.0 times, particularly 1.0 times to 1.5 times, of the first stage magnification. The higher the second-stage stretching ratio, the higher the Young's modulus and the higher the strength. However, in order to provide practical elongation, the total magnification must be 2.0 times or less than the first-stage stretching ratio. It is. It is also effective to carry out fixed length heat treatment. Fixed length heat treatment, or tension heat treatment, is heat treatment without stretching, and surprisingly both strength and elastic modulus are improved by such fixed length heat treatment. In addition, in the case of relaxation heat treatment, although the heat resistance of the yarn is improved, fibers with high strength and high elastic modulus as intended by the present invention cannot be obtained. The yarn according to the present invention achieves an improvement in strength of about 1 g/d and an improvement in Young's modulus of 10 g/d or more compared to yarn manufactured by the conventional method. On the other hand, it has also become clear that the shrinkage rate is also reduced at the same time, making it possible to obtain fibers with shrinkage rates preferable for various high-order treatments. Moreover, the yarn of the present invention exhibits a significant increase in density and birefringence compared to conventional yarns, and the internal structure of the fiber changes toward a more complete structure. The yarn of the present invention exhibits to a higher degree the heat resistance and chemical resistance properties inherent to aromatic sulfide polymers. Effects similar to those of the present invention cannot be obtained by only one stage of stretching. If you try to stretch it to a high magnification in one step, the yarn will break. The present invention will be specifically described below based on Examples. Example 1 Thicken in advance and increase shear rate at 300℃
A polyphenylene sulfide polymer having a viscosity of 3500 poise measured at 200 sec -1 is processed into pellets and fed to an extruder type extruder together with a lubricant. This pellet is ASTM-D-
1238-70, the melt flow was measured at 350°C under a load of 5 kg and it was 70. After melt-kneading this polymer at a temperature of 330°C, it was discharged at a rate of 5.3 g per minute from a nozzle with 18 0.23 mm diameter pores, cooled and solidified in air, and then a finishing agent was applied for 1 minute. 800m
It was rolled up at a rate of . The natural stretching ratio of this undrawn yarn was 1.4 times, and it had a strength of 1.3 g/d and an elongation of 200%. This undrawn yarn was stretched 2.0 times using a hot pin with a surface temperature of 98°C, and then a second drawing was performed on a hot plate kept at 180°C so that the total magnification was 2.5 times. . Table 1 shows the fiber quality obtained at this time.
【表】
強伸度は東洋ボールドウイン社製のテンシロン
式測定器で、試長200mm引張速度200mm／minの条
件で求めたものである。第１表から明らかなよう
に本発明の方法によれば、従来の糸条に比べ約１
ｇ／ｄの強度の向上と15ｇ／ｄのヤング率の向上
がみられる。
実施例 ２
あらかじめ加熱し増粘され、先の実施例と同じ
条件で測定した溶融粘度が4900ポイズであり、メ
ルトフローが30である、主としてポリフエニレン
サルフアイドからなる重合体をペレツト状で滑剤
とともに供給し、350℃の温度で溶融したのち0.3
mm直径の18個の細孔を有する口金から１分間5.4
ｇの割合で吐出する。冷却ゾーンに入り固化した
繊維は仕上剤を付与され200ｍ／minの速度で引
取ロールに入り、巻取ることなく95℃の温度に加
熱し、3.9倍の倍率で延伸する。本発明に従がい、
引続いて定長熱処理または第二段目の延伸を250
℃に保つた熱板の上で種々の倍率で行なつてか
ら、巻取機で巻取つた。得られた糸条の特性を比
較例とともに第２表に示す。[Table] The strength and elongation were determined using a Tensilon measuring device manufactured by Toyo Baldwin Co., Ltd. under conditions of a sample length of 200 mm and a tensile speed of 200 mm/min. As is clear from Table 1, according to the method of the present invention, compared to the conventional yarn, approximately 1
An improvement in strength of g/d and Young's modulus of 15 g/d can be seen. Example 2 A polymer consisting mainly of polyphenylene sulfide, which had been heated in advance to thicken it and had a melt viscosity of 4900 poise measured under the same conditions as in the previous example and a melt flow of 30, was made into a lubricant in the form of pellets. 0.3 after melting at a temperature of 350℃.
5.4 for 1 minute from a nozzle with 18 pores of mm diameter
Discharge at a rate of g. After entering the cooling zone and solidifying the fibers, the fibers are coated with a finishing agent and enter a take-up roll at a speed of 200 m/min, where they are heated to a temperature of 95°C without being wound up and drawn at a magnification of 3.9 times. Pursuant to the invention,
Subsequently, constant length heat treatment or second stage stretching is performed at 250°C.
It was carried out at various magnifications on a hot plate kept at ℃, and then wound up with a winder. The properties of the obtained yarn are shown in Table 2 together with comparative examples.
【表】
ここにおいて乾熱収縮率は150℃30分の条件で
測定したものであり、複屈折はベレツクのコンペ
ンセータを用いてNa−Ｄ線で測定した。また密
度は臭化カリウム水溶液を用いた密度勾配管で測
定した値である。
１番の一段延伸のみによる糸条は従来からの方
法による糸条であり、５番の糸条は二段目の延伸
倍率が本発明の範囲外であつていずれも比較とし
て示した。
実施例は１番の比較例とくらべて強度で１ｇ／
ｄ、ヤング率で20ｇ／ｄ程度以上の著しい向上が
見られる。又５番の比較例は弛緩熱処理であるた
め、収縮率の面では優れた特性を有しているもの
の強度ヤング率の面で本発明品より劣つているこ
とがわかる。
本発明の定長熱処理した２番および全倍率を
4.3倍と4.7倍に二段延伸した３番と４番による糸
条は、一段延伸糸に比べ密度ならびに複屈折の増
加が認められ、繊維構造が緻密化しているものと
考えられるが、これが本発明による飛躍的な効果
を生んだものと考えられる。
実施例 ３
実施例２の糸条のうち１番（比較例）と２番
（本発明）について耐熱性と耐薬品性を測定した。
耐熱性は250℃の空気中に弛緩して50時間放置し
たのちの強度の保持率で、耐薬品性は常温下に於
いて98％硫酸に100時間浸漬後の強度の保持率で
評価した。結果を第３表に示す。[Table] Here, the dry heat shrinkage rate was measured under the conditions of 150°C for 30 minutes, and the birefringence was measured with the Na-D line using a Berek compensator. The density is a value measured using a density gradient tube using an aqueous potassium bromide solution. The yarn No. 1 that was only subjected to one-step drawing was a yarn that was made using a conventional method, and the yarn No. 5 had a second-step drawing ratio that was outside the range of the present invention, and both were shown for comparison. The strength of the example is 1g/ compared to the first comparative example.
d, a remarkable improvement of about 20 g/d or more in Young's modulus is observed. Moreover, since Comparative Example No. 5 was subjected to relaxation heat treatment, it was found that although it had excellent properties in terms of shrinkage rate, it was inferior to the product of the present invention in terms of Young's modulus of strength. The fixed length heat treated No. 2 and full magnification of the present invention
The yarns made by No. 3 and No. 4, which were drawn in two steps at 4.3 times and 4.7 times, showed an increase in density and birefringence compared to the single-step drawn yarn, and it is thought that the fiber structure was denser. It is thought that this invention produced a dramatic effect. Example 3 Among the yarns of Example 2, heat resistance and chemical resistance were measured for No. 1 (comparative example) and No. 2 (invention).
Heat resistance was evaluated by the strength retention rate after being relaxed in air at 250°C for 50 hours, and chemical resistance was evaluated by the strength retention rate after being immersed in 98% sulfuric acid for 100 hours at room temperature. The results are shown in Table 3.
【表】
比較例においても相当の耐熱、耐薬品性を示し
ているが、本発明によれば一層の特性の改良が認
められる。[Table] Comparative examples also show considerable heat resistance and chemical resistance, but according to the present invention, further improvement in properties is observed.
Claims (1)
伸するに際して、未延伸糸を該未延伸糸の自然延
伸比以上の倍率で延伸した後、下記の工程Ａ、ま
たは工程Ｂを行なうことを特徴とする芳香族サル
フアイド繊維の製造方法。 工程Ａ 温度150〜260℃でかつ前記１段目の延伸
温度以上で定長熱処理する工程。 工程Ｂ 温度150〜260℃でかつ前記１段目の延伸
温度以上であつて、全延伸倍率が前記１段目の
延伸倍率の1.0倍超過から2.0倍の範囲で延伸す
る工程。[Scope of Claims] 1 When melt-spinning and drawing an aromatic sulfide polymer, after drawing the undrawn yarn at a magnification equal to or higher than the natural drawing ratio of the undrawn yarn, the following step A or step B is carried out. 1. A method for producing aromatic sulfide fiber, characterized by carrying out the following steps. Step A: A step of constant length heat treatment at a temperature of 150 to 260° C. and above the first-stage stretching temperature. Step B: A step of stretching at a temperature of 150 to 260° C. and above the first-stage stretching temperature, with a total stretching ratio in the range of 1.0 times to 2.0 times the first-stage stretching ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2544181A JPS57143518A (en) | 1981-02-25 | 1981-02-25 | Production of aromatic sulfide fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2544181A JPS57143518A (en) | 1981-02-25 | 1981-02-25 | Production of aromatic sulfide fiber |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32694289A Division JPH02191711A (en) | 1989-12-15 | 1989-12-15 | Aromatic sulfide fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57143518A JPS57143518A (en) | 1982-09-04 |
| JPS643961B2 true JPS643961B2 (en) | 1989-01-24 |
Family
ID=12166083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2544181A Granted JPS57143518A (en) | 1981-02-25 | 1981-02-25 | Production of aromatic sulfide fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143518A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS616390A (en) * | 1984-05-01 | 1986-01-13 | ジエイダブリユ−アイ・リミテツド | Cloth for dryer having yarn strand prepared from melt extrudable polyphenylene sulfide |
| DE3428984A1 (en) * | 1984-08-07 | 1986-02-20 | Bayer Ag, 5090 Leverkusen | METHOD FOR THE PRODUCTION OF HIGH MOLECULAR POLYARYL SULFIDES, BRANCHED IF NEEDED |
| JPS61152828A (en) * | 1984-12-26 | 1986-07-11 | Kureha Chem Ind Co Ltd | Production of drawn multifilament of polyarylene sulfide |
| JPH0796724B2 (en) * | 1985-03-22 | 1995-10-18 | 呉羽化学工業株式会社 | High-performance polyarylene thioether fiber and method for producing the same |
| JPS6215323A (en) * | 1986-02-14 | 1987-01-23 | Dainippon Ink & Chem Inc | Production of microporous hollow fiber |
| US7395680B2 (en) | 2004-07-20 | 2008-07-08 | Federal Mogul Worldwide, Inc. | Self-curling knitted sleeve and method of fabrication |
| JP5251490B2 (en) | 2008-01-09 | 2013-07-31 | 東レ株式会社 | Polyphenylene sulfide fiber and method for producing the same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1007414A (en) * | 1972-03-24 | 1977-03-29 | James T. Edmonds (Jr.) | Poly(arylene sulfide) resin fiber production |
| JPS5090742A (en) * | 1973-12-24 | 1975-07-21 | ||
| JPS5212240A (en) * | 1975-07-18 | 1977-01-29 | Matsushita Electric Ind Co Ltd | Process for preparing transparent coating compounds |
| JPS5230609A (en) * | 1975-09-01 | 1977-03-08 | Yanmar Agricult Equip | Traction controller of agricultural tractor |
| JPS5322574A (en) * | 1976-08-13 | 1978-03-02 | Tomotoshi Tokunou | Manufacture of long size plastic goods reinforced with carbon fibfr |
| JPS5338712A (en) * | 1976-09-14 | 1978-04-10 | Unitika Ltd | Production of high-tenacity nylon 6 yarn |
| JPS55103308A (en) * | 1979-01-31 | 1980-08-07 | Mitsubishi Chem Ind Ltd | Production of polyethylene terephthalate monofilament |
-
1981
- 1981-02-25 JP JP2544181A patent/JPS57143518A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143518A (en) | 1982-09-04 |
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