JPH11241217A - Production of high strength polytetrafluoro-ethylene resin fiber - Google Patents
Production of high strength polytetrafluoro-ethylene resin fiberInfo
- Publication number
- JPH11241217A JPH11241217A JP4207298A JP4207298A JPH11241217A JP H11241217 A JPH11241217 A JP H11241217A JP 4207298 A JP4207298 A JP 4207298A JP 4207298 A JP4207298 A JP 4207298A JP H11241217 A JPH11241217 A JP H11241217A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- polytetrafluoroethylene resin
- producing
- extruded
- resin fiber
- 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.)
- Pending
Links
Landscapes
- Artificial Filaments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はポリテトラフルオロ
エチレン（ＰＴＦＥ）樹脂繊維の製造方法に関する。The present invention relates to a method for producing polytetrafluoroethylene (PTFE) resin fiber.
【０００２】[0002]
【従来の技術】高強度・高弾性率ポリテトラフルオロエ
チレン樹脂繊維の製造は以下の方法で行なわれる。2. Description of the Related Art The production of high-strength and high-modulus polytetrafluoroethylene resin fibers is carried out by the following method.
【０００３】ポリテトラフルオロエチレン樹脂微粉末と
押出助剤として適当な有機溶剤を混合してコンパウンド
とし、得られたコンパウンドを用いて加圧成形して押出
成形用の予備成形物としてビレットを製造する。得られ
たビレットを押出成形機に入れて加熱下にラムで加圧し
て押出成形してペースト押出繊維（モノフィラメント）
とする。得られたペースト押出繊維を予め乾燥した後に
ポリテトラフルオロエチレン樹脂繊維の融点以上で焼結
し、次いで延伸して目的とするポリテトラフルオロエチ
レン樹脂繊維を得る。この場合の延伸倍率は１０〜５０
倍とされる。[0003] A fine powder of polytetrafluoroethylene resin and an appropriate organic solvent as an extrusion aid are mixed to form a compound, and the resulting compound is subjected to pressure molding to produce a billet as a preform for extrusion molding. . The obtained billet is put into an extruder, and is extruded by pressurizing with a ram under heating to extrude a paste extruded fiber (monofilament).
And The obtained paste extruded fiber is dried in advance, sintered at a melting point of the polytetrafluoroethylene resin fiber or higher, and then stretched to obtain a target polytetrafluoroethylene resin fiber. The stretching ratio in this case is 10 to 50
Doubled.
【０００４】以上のような方法によって、より大きな強
度あるいは弾性率のポリテトラフルオロエチレン樹脂繊
維を得るにはより高い延伸倍率を必要とする。しかしな
がら、延伸倍率を高くすると延伸中または延伸直後に繊
維が破断しやすくなるので、高強度・高弾性ポリテトラ
フルオロエチレン樹脂繊維の製造あるいは性能向上の障
害となっている。In order to obtain a polytetrafluoroethylene resin fiber having a higher strength or a higher elastic modulus by the above method, a higher draw ratio is required. However, if the draw ratio is increased, the fiber is likely to break during or immediately after drawing, which is an obstacle to the production or performance improvement of a high-strength and high-modulus polytetrafluoroethylene resin fiber.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、高強
度・高弾性率ポリテトラフルオロエチレン樹脂繊維の製
造方法における、延伸中および延伸後の繊維破断の問題
を解決した高強度・高弾性率ポリテトラフルオロエチレ
ン樹脂繊維の製造方法を提供することにある。本発明は
より高い延伸倍率で延伸することが可能な高強度・高弾
性率ポリテトラフルオロエチレン樹脂繊維の製造方法を
提供する。SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-strength and high-elasticity fiber in a method for producing a high-strength and high-modulus polytetrafluoroethylene resin fiber which solves the problem of fiber breakage during and after drawing. Another object of the present invention is to provide a method for producing a polytetrafluoroethylene resin fiber. The present invention provides a method for producing a high-strength and high-modulus polytetrafluoroethylene resin fiber that can be drawn at a higher draw ratio.
【０００６】[0006]
【課題を解決するための手段】ポリテトラフルオロエチ
レン樹脂から得られる末延伸繊維を架橋し、得られる架
橋繊維を延伸する。このような架橋繊維をより高い倍率
で延伸すれば、より細く且つより高強度・高弾性率のポ
リテトラフルオロエチレン樹脂繊維が得られる。SUMMARY OF THE INVENTION A stretched fiber obtained from a polytetrafluoroethylene resin is crosslinked, and the resulting crosslinked fiber is stretched. If such a crosslinked fiber is stretched at a higher magnification, a polytetrafluoroethylene resin fiber which is finer and has a higher strength and a higher elastic modulus can be obtained.
【０００７】本発明の方法における架橋は、使用するポ
リテトラフルオロエチレン樹脂の融点以上で且つ４００
℃以下の温度でγ線、電子線などを照射して架橋する。In the method of the present invention, the crosslinking is carried out at a temperature not lower than the melting point of the polytetrafluoroethylene resin used and 400
Crosslinking is performed by irradiating γ-rays, electron beams, etc. at a temperature of not more than ℃.
【０００８】上記照射架橋温度が使用ポリテトラフルオ
ロエチレン樹脂の融点以下となると分解が行なわれる。
また上記照射架橋温度が４００℃以上となると分解が行
なわれる。上記照射架橋温度を使用ポリテトラフルオロ
エチレン樹脂の融点より５℃〜１０℃高い温度範囲とす
るのが好ましく、その理由はペースト押出繊維の成形に
際して形成されたポリテトラフルオロエチレン分子の配
合を崩すことなく架橋できるからである。When the irradiation crosslinking temperature becomes lower than the melting point of the polytetrafluoroethylene resin to be used, decomposition occurs.
When the irradiation crosslinking temperature is 400 ° C. or higher, decomposition is performed. It is preferable that the irradiation crosslinking temperature is in a temperature range of 5 ° C. to 10 ° C. higher than the melting point of the used polytetrafluoroethylene resin, because the compounding of the polytetrafluoroethylene molecules formed during the formation of the paste extruded fiber is broken. This is because they can be crosslinked without any problem.
【０００９】上記架橋における照射線量は、吸収線量が
１ＫＧｙ以下、好ましくは０．１ＫＧｙ以下とするのが
良い。吸収線量が１ＫＧｙ以上となると架橋密度が過大
となって延伸ができなくなる。高い倍率で延伸するため
には、軽度の架橋密度に止める必要があり、このために
は吸収線量を０．１ＫＧｙ以下とするのが望ましい。The irradiation dose in the crosslinking is preferably such that the absorbed dose is 1 KGy or less, preferably 0.1 KGy or less. If the absorbed dose is 1 KGy or more, the crosslink density becomes excessive and stretching cannot be performed. In order to stretch at a high magnification, it is necessary to keep the crosslinking density at a low level. For this purpose, the absorbed dose is desirably 0.1 KGy or less.
【００１０】[0010]
【発明の実施の形態】本発明の方法は、ポリテトラフル
オロエチレン樹脂パウダと押出成形助剤である有機溶剤
とを配合して得られるコンパウンドを予備成形し、得ら
れる予備成形物を用いて押出成形してペースト押出繊維
とし、得られるペースト押出繊維を乾燥した後、得られ
る乾燥繊維を焼結し、次いで延伸するポリテトラフルオ
ロエチレン樹脂繊維の製造方法において、上記延伸の前
に繊維を照射して架橋するポリテトラフルオロエチレン
樹脂繊維の製造方法である。DETAILED DESCRIPTION OF THE INVENTION The method of the present invention comprises preforming a compound obtained by blending a polytetrafluoroethylene resin powder with an organic solvent as an extrusion molding aid, and extruding the compound using the obtained preformed product. In the method for producing a polytetrafluoroethylene resin fiber, which is molded and formed into a paste extruded fiber, and after drying the obtained paste extruded fiber, sintering the obtained dried fiber and then drawing it, the fiber is irradiated before the drawing. This is a method for producing a polytetrafluoroethylene resin fiber which is crosslinked by heating.
【００１１】本発明の方法であって、γ線照射架橋を行
う一群のものは、ポリテトラフルオロエチレン樹脂パウ
ダと押出成形助剤である有機溶剤とを配合して得られる
コンパウンドを予備成形し、得られる予備成形物を用い
て押出成形してペースト押出繊維とし、得られるペース
ト押出繊維を乾燥した後、得られる乾燥繊維を焼結し、
次いで延伸するポリテトラフルオロエチレン樹脂繊維の
製造方法において、延伸前の繊維を上記ポリテトラフル
オロエチレン樹脂繊維の融点以上で且つ４００℃以下の
温度でγ線照射して架橋するポリテトラフルオロエチレ
ン樹脂繊維の製造方法である。[0011] In the method of the present invention, a group of γ-irradiation crosslinking is carried out by preforming a compound obtained by blending a polytetrafluoroethylene resin powder and an organic solvent as an extrusion molding aid, Extrusion molding is performed using the obtained preform to obtain a paste extruded fiber, and after drying the obtained paste extruded fiber, the obtained dried fiber is sintered,
Next, in the method for producing a polytetrafluoroethylene resin fiber to be drawn, the fiber before drawing is cross-linked by γ-ray irradiation at a temperature of not less than the melting point of the polytetrafluoroethylene resin fiber and not more than 400 ° C. It is a manufacturing method of.
【００１２】本発明の方法であって、照射架橋の条件を
限定した一群のものは、ポリテトラフルオロエチレン樹
脂パウダと押出成形助剤である有機溶剤とを配合して得
られるコンパウンドを予備成形し、得られる予備成形物
を用いて押出成形してペースト押出繊維とし、得られる
ペースト押出繊維を乾燥した後、得られる乾燥繊維を焼
結し、次いで延伸するポリテトラフルオロエチレン樹脂
繊維の製造方法において、延伸前の繊維を上記ポリテト
ラフルオロエチレン樹脂の融点の５℃〜１０℃高い温度
でγ線照射して架橋するポリテトラフルオロエチレン樹
脂繊維の製造方法である。[0012] In the method of the present invention, a group of compounds in which the conditions of irradiation crosslinking are limited, a compound obtained by blending a polytetrafluoroethylene resin powder and an organic solvent as an extrusion molding aid is preformed. In the method for producing a polytetrafluoroethylene resin fiber, the obtained extruded product is extrusion-molded into a paste extruded fiber, the obtained paste extruded fiber is dried, the obtained dried fiber is sintered, and then drawn. A method of producing a polytetrafluoroethylene resin fiber in which the fiber before stretching is irradiated with γ-rays at a temperature higher by 5 ° C. to 10 ° C. than the melting point of the polytetrafluoroethylene resin and crosslinked.
【００１３】[0013]
【実施例】本発明の一実施例について説明する。An embodiment of the present invention will be described.
【００１４】（１）樹脂−押出助剤混合物（コンパウン
ド）の製造工程 ＰＴＦＥ樹脂微粉末（ふるいを通してさらさらにした状
態のファインパウダ、融点３２７℃）の４重量部と押出
助剤である有機溶剤の１重量部とを配合して混合・分散
用容器内に密封し、上記混合・分散用容器を回転手段の
架台上で回転させてＰＴＦＥ樹脂微粉末と押出助剤とを
十分に混合・分散させた後、さらに数時間静置する。(1) Production process of resin-extrusion aid mixture (compound) 4 parts by weight of PTFE resin fine powder (fine powder in a state of being smoothed through a sieve, melting point: 327 ° C.) and an organic solvent as an extrusion aid 1 part by weight, sealed in a mixing / dispersing container, and rotating the mixing / dispersing container on a gantry of rotating means to sufficiently mix / disperse the PTFE resin fine powder and the extrusion aid. After that, it is left still for several hours.
【００１５】（２）予備成形体の製造工程 前工程で得られたＰＴＦＥ樹脂微粉末−押出助剤混合物
を加圧成形手段によって成形し、押出工程用の予備成形
体であるビレットを製造する。加圧成形圧力は数Ｋｇ／
ｃｍ2 程度とし、この圧力に数分間保持する。(2) Manufacturing step of preformed body The PTFE resin fine powder-extrusion aid mixture obtained in the preceding step is formed by pressure forming means to produce a billet as a preformed body for the extrusion step. Pressure forming pressure is several kg /
cm 2 and kept at this pressure for several minutes.
【００１６】（３）ペースト押出繊維の製造工程 前工程で得られたＰＴＦＥ樹脂微粉末−押出助剤混合物
から成る予備成形体（ビレット）を用いた押出成形手段
によってペースト押出繊維（モノフィラメント）を製造
する。(3) Manufacturing process of paste-extruded fiber [0016] Extruded paste fiber (monofilament) is manufactured by extrusion molding using a preform (billet) formed of a mixture of PTFE resin fine powder and an extrusion aid obtained in the previous step. I do.
【００１７】（４）ペースト押出繊維の乾燥工程 前工程で得られたペースト押出繊維を加熱乾燥手段で処
理してペースト押出繊維中の押出助剤としての有機溶剤
を乾燥する。乾燥温度は２００℃〜３００℃の範囲と
し、１〜２分間乾燥する。この乾燥工程で押出助剤とし
ての有機溶剤が蒸発し、ＰＴＦＥ樹脂が単体となる。(4) Drying step of extruded paste fiber The extruded paste fiber obtained in the previous step is treated by a heating and drying means to dry an organic solvent as an extrusion aid in the extruded paste fiber. The drying temperature is in the range of 200 ° C. to 300 ° C., and drying is performed for 1 to 2 minutes. In this drying step, the organic solvent as the extrusion aid evaporates, and the PTFE resin becomes a simple substance.
【００１８】（５）焼結繊維の製造工程 前工程で得られた乾燥繊維を３８０℃〜４００℃の温度
範囲で数分間焼結する。(5) Sintered Fiber Manufacturing Step The dried fiber obtained in the preceding step is sintered at a temperature of 380 ° C. to 400 ° C. for several minutes.
【００１９】（６）架橋繊維の製造工程 前工程で得られた焼結繊維を３３２℃〜３３７℃の温度
範囲で、γ線を０．０１〜０．１ＫＧｙ照射して架橋す
る。(6) Step of Producing Cross-Linked Fiber The sintered fiber obtained in the previous step is cross-linked by irradiating 0.01 to 0.1 KGy of γ-ray at a temperature range of 332 ° C. to 337 ° C.
【００２０】（７）延伸繊維の製造工程 前工程で得られた架橋繊維を、再び３８０℃〜４００℃
の温度範囲とした後、１０から５０倍の延伸倍率で延伸
して高強度・高弾性率のＰＴＦＥ樹脂繊維を得る。(7) Process for producing drawn fiber The crosslinked fiber obtained in the preceding process is again subjected to 380 ° C to 400 ° C.
And then stretched at a draw ratio of 10 to 50 times to obtain a PTFE resin fiber having high strength and high elastic modulus.
【００２１】[0021]
【発明の効果】高強度・高弾性率ポリテトラフルオロエ
チレン樹脂繊維の製造方法において、延伸中および延伸
後の繊維破断を防止する。As described above, in the method for producing a high-strength and high-modulus polytetrafluoroethylene resin fiber, fiber breakage during and after drawing is prevented.
Claims (3)
と押出成形助剤である有機溶剤とを配合して得られるコ
ンパウンドを予備成形し、得られる予備成形物を用いて
押出成形してペースト押出繊維とし、得られるペースト
押出繊維を乾燥した後、得られる乾燥繊維を焼結し、次
いで延伸するポリテトラフルオロエチレン樹脂繊維の製
造方法において、上記延伸の前に繊維を照射して架橋す
るポリテトラフルオロエチレン樹脂繊維の製造方法。1. A compound obtained by blending a polytetrafluoroethylene resin powder and an organic solvent as an extrusion molding aid is preformed, and the obtained preformed product is extruded into paste extruded fibers, After drying the obtained paste extruded fiber, sintering the obtained dried fiber and then drawing it, the method for producing a polytetrafluoroethylene resin fiber, in which the fiber is irradiated and cross-linked before the drawing, Fiber manufacturing method.
と押出成形助剤である有機溶剤とを配合して得られるコ
ンパウンドを予備成形し、得られる予備成形物を用いて
押出成形してペースト押出繊維とし、得られるペースト
押出繊維を乾燥した後、得られる乾燥繊維を焼結し、次
いで延伸するポリテトラフルオロエチレン樹脂繊維の製
造方法において、延伸前の繊維を上記ポリテトラフルオ
ロエチレン樹脂繊維の融点以上で且つ４００℃以下の温
度でγ線照射して架橋するポリテトラフルオロエチレン
樹脂繊維の製造方法。2. A compound obtained by blending a polytetrafluoroethylene resin powder and an organic solvent as an extrusion molding aid is preformed, and the obtained preformed product is extruded into paste extruded fibers, After drying the obtained paste extruded fiber, sintering the obtained dried fiber and then drawing it, in the method for producing a polytetrafluoroethylene resin fiber, the fiber before drawing is at or above the melting point of the polytetrafluoroethylene resin fiber and A method for producing a polytetrafluoroethylene resin fiber which is cross-linked by irradiating with γ rays at a temperature of 400 ° C. or lower.
と押出成形助剤である有機溶剤とを配合して得られるコ
ンパウンドを予備成形し、得られる予備成形物を用いて
押出成形してペースト押出繊維とし、得られるペースト
押出繊維を乾燥した後、得られる乾燥繊維を焼結し、次
いで延伸するポリテトラフルオロエチレン樹脂繊維の製
造方法において、延伸前の繊維を上記ポリテトラフルオ
ロエチレン樹脂の融点の５℃〜１０℃高い温度でγ線照
射して架橋するポリテトラフルオロエチレン樹脂繊維の
製造方法。3. A compound obtained by blending a polytetrafluoroethylene resin powder with an organic solvent as an extrusion molding aid is preformed, and the obtained preformed product is extruded into a paste extruded fiber, After drying the obtained paste extruded fiber, sintering the obtained dried fiber, and then drawing it, the method for producing a polytetrafluoroethylene resin fiber comprises: A method for producing a polytetrafluoroethylene resin fiber which is cross-linked by irradiating with γ-ray at a temperature higher by 10 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4207298A JPH11241217A (en) | 1998-02-24 | 1998-02-24 | Production of high strength polytetrafluoro-ethylene resin fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4207298A JPH11241217A (en) | 1998-02-24 | 1998-02-24 | Production of high strength polytetrafluoro-ethylene resin fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11241217A true JPH11241217A (en) | 1999-09-07 |
Family
ID=12625877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4207298A Pending JPH11241217A (en) | 1998-02-24 | 1998-02-24 | Production of high strength polytetrafluoro-ethylene resin fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11241217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010038800A1 (en) * | 2008-09-30 | 2010-04-08 | 株式会社レイテック | Moldable polytetrafluoroethylene resin, application product, and process for producing same |
-
1998
- 1998-02-24 JP JP4207298A patent/JPH11241217A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010038800A1 (en) * | 2008-09-30 | 2010-04-08 | 株式会社レイテック | Moldable polytetrafluoroethylene resin, application product, and process for producing same |
| JPWO2010038800A1 (en) * | 2008-09-30 | 2012-03-01 | 株式会社レイテック | Polytetrafluoroethylene resin that can be molded, applied products, and manufacturing method thereof |
| JP2015078374A (en) * | 2008-09-30 | 2015-04-23 | 株式会社レイテック | Moldable polytetrafluoroethylene resin, application product, and method for producing the same |
| JP5713677B2 (en) * | 2008-09-30 | 2015-05-07 | 株式会社レイテック | Polytetrafluoroethylene resin that can be molded, applied products, and manufacturing method thereof |
| US9266984B2 (en) | 2008-09-30 | 2016-02-23 | Raytech Corporation | Polytetrafluoroethylene resins that can be processed by shaping, shaped products thereof, and processes for producing the resins and shaped products |
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