JP2003048739A - Method for manufacturing optical fiber - Google Patents
Method for manufacturing optical fiberInfo
- Publication number
- JP2003048739A JP2003048739A JP2001236246A JP2001236246A JP2003048739A JP 2003048739 A JP2003048739 A JP 2003048739A JP 2001236246 A JP2001236246 A JP 2001236246A JP 2001236246 A JP2001236246 A JP 2001236246A JP 2003048739 A JP2003048739 A JP 2003048739A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- drawing furnace
- glass fiber
- storage box
- glass
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
- C03B37/02727—Annealing or re-heating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/029—Furnaces therefor
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は線引き直後のガラス
ファイバへのダストの付着を防止した光ファイバの製造
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an optical fiber in which dust is prevented from adhering to a glass fiber immediately after being drawn.
【０００２】[0002]
【従来の技術】線引き直後のガラスファイバ（裸ガラス
ファイバ）に紫外線硬化型樹脂などのガラス保護用樹脂
を被覆した光ファイバは、光ファイバ母材を線引炉内で
熱軟化させつつ延伸し、引き出されるガラスファイバを
冷却装置で冷却した後、ガラス保護用の樹脂被覆装置を
通して樹脂を被覆する方法により製造されている。光フ
ァイバのガラス径は、光学特性、強度信頼性、接続時の
外径整合性などのために、できるだけ一定であることが
望ましい。このガラス径はガラス内の気泡や空気中のダ
ストによる汚染などにより局所的に変動することがあ
り、このような局所的変動を低減させてガラス径を安定
化させることにより、光ファイバとしての信頼性を向上
させることができる。また、ガラスに低強度部が存在す
るとファイバ使用時に断線するおそれがあるため、光フ
ァイバの出荷まえに予め低強度部を断線させるスクリー
ニング試験が行われるが、ガラス内部の異物や外気から
のダスト汚染などにより低強度部が発生するとスクリー
ニング試験時に断線回数が多くなり製造コスト上昇の原
因となる。2. Description of the Related Art An optical fiber obtained by coating a glass fiber (bare glass fiber) immediately after drawing with a glass-protecting resin such as an ultraviolet curable resin is drawn while heat-softening an optical fiber base material in a drawing furnace. It is manufactured by a method of cooling the drawn glass fiber with a cooling device and then coating the resin through a resin coating device for glass protection. It is desirable that the glass diameter of the optical fiber be as constant as possible due to optical characteristics, strength reliability, outer diameter matching at the time of connection, and the like. This glass diameter may fluctuate locally due to air bubbles in the glass or contamination by dust in the air. By reducing such local fluctuations and stabilizing the glass diameter, the reliability of the optical fiber is improved. It is possible to improve the sex. Also, if there is a low-strength part in the glass, the fiber may be broken when the fiber is used.Therefore, a screening test is performed to disconnect the low-strength part before shipment of the optical fiber.However, foreign matter inside the glass and dust contamination from the outside air If a low strength portion is generated due to such reasons, the number of wire breakages increases during the screening test, which causes an increase in manufacturing cost.
【０００３】光ファイバにおけるダスト汚染を防止して
スクリーニング試験時の断線回数を低減する方法とし
て、光ファイバ母材を線引炉で加熱延伸し、引き出され
るガラスファイバを冷却装置で強制冷却した後、樹脂被
覆装置で樹脂を被覆し、得られる光ファイバを巻き取る
線引方法において、強制冷却装置を包囲容器で囲み、そ
の中が陽圧となるようにクリーンエア等を送り込むこと
によりファイバへのダスト付着を防ぐ方法が提案されて
いる（特開平６−２４７８８号公報）。ダスト汚染によ
る断線（強度の低下）は、ダストが線引き直後のガラス
ファイバに付着し、微小な傷が発生することにより起こ
るものであり、これを防ぐためには樹脂を被覆するまで
のガラスファイバが通過する空間全てにおいて、ダスト
の付着を防止することが必要である。また、線引き前の
光ファイバ母材へのダスト付着によっても、微小な傷の
発生や加熱によるガラスの結晶化が起こり断線の原因と
なり、さらに線引炉内から発生するダスト（カーボンや
シリカダストなど）も断線の原因となる。As a method of preventing dust contamination in an optical fiber and reducing the number of disconnections during the screening test, the optical fiber preform is heated and drawn in a drawing furnace, and the drawn glass fiber is forcibly cooled by a cooling device. In the drawing method of coating the resin with a resin coating device and winding the resulting optical fiber, the forced cooling device is surrounded by an enclosing container, and dust is applied to the fiber by sending clean air etc. so that the inside becomes a positive pressure. A method for preventing adhesion has been proposed (Japanese Patent Laid-Open No. 6-24788). The disconnection (decrease in strength) due to dust contamination is caused by dust adhering to the glass fiber immediately after drawing and causing minute scratches.To prevent this, the glass fiber before coating with the resin passes through. It is necessary to prevent dust from adhering in all the spaces to be used. In addition, even if dust adheres to the optical fiber preform before drawing, minute scratches and crystallization of glass due to heating will occur, which will cause wire breakage, and dust generated in the drawing furnace (such as carbon and silica dust). ) Also causes disconnection.
【０００４】[0004]
【発明が解決しようとする課題】すなわち、前記方法の
ように強制冷却装置の周囲におけるダスト付着を防止す
るだけでは不十分であり、さらに効果的な方法の開発が
望まれている。本発明は上記従来技術に鑑み、線引き時
におけるダスト汚染を低減し、安定した特性を有し、外
径が一定で低強度部が少ない光ファイバの製造方法を提
供することを目的とする。That is, it is not sufficient to prevent dust from adhering to the periphery of the forced cooling device as in the above method, and it is desired to develop a more effective method. The present invention has been made in view of the above-described conventional art, and an object thereof is to provide a method for manufacturing an optical fiber which has a dust-reducing property at the time of drawing, has stable characteristics, has a constant outer diameter, and has a low strength portion.
【０００５】[0005]
【課題を解決するための手段】本発明は前記課題を解決
する手段として次の（１）〜（４）に示す構成を含むも
のである。
（１）光ファイバ母材を線引きし、得られるガラスファ
イバをガラス保護用の樹脂で被覆する光ファイバの製造
方法において、線引炉と線引炉外に出ている光ファイバ
母材を囲む線引炉収納ボックスを設け、該線引炉収納ボ
ックスに内部が陽圧となるようにクリーンエアを導入
し、光ファイバ母材及びガラスファイバへのダスト付着
を防止することを特徴とする光ファイバの製造方法。
（２）光ファイバ母材を線引きし、得られるガラスファ
イバをガラス保護用の樹脂で被覆する光ファイバの製造
方法において、線引炉と線引炉外に出ている光ファイバ
母材を囲む線引炉収納ボックスと、線引炉収納ボックス
から冷却装置を経て樹脂被覆装置に至るまでのガラスフ
ァイバ及び冷却装置を囲むガラスファイバ収納ボックス
とを設け、該線引炉収納ボックス及びガラスファイバ収
納ボックスのそれぞれに内部が陽圧となるようにクリー
ンエアを導入し、光ファイバ母材及びガラスファイバへ
のダスト付着を防止することを特徴とする光ファイバの
製造方法。The present invention includes the following constitutions (1) to (4) as means for solving the above problems. (1) In a method of manufacturing an optical fiber in which an optical fiber preform is drawn and the obtained glass fiber is covered with a resin for glass protection, a wire surrounding the drawing furnace and the optical fiber preform that is outside the drawing furnace. A pulling furnace storage box is provided, and clean air is introduced into the drawing furnace storage box so that the inside has a positive pressure to prevent dust from adhering to the optical fiber preform and the glass fiber. Production method. (2) In a method of manufacturing an optical fiber in which an optical fiber preform is drawn and the obtained glass fiber is coated with a resin for glass protection, a wire surrounding the drawing furnace and the optical fiber preform that is outside the drawing furnace. A drawing furnace storage box and a glass fiber storage box surrounding the glass fiber and the cooling device from the drawing furnace storage box through the cooling device to the resin coating device are provided, and the drawing furnace storage box and the glass fiber storage box A method for producing an optical fiber, characterized in that clean air is introduced into each of them so as to have a positive pressure inside to prevent dust from adhering to the optical fiber preform and the glass fiber.
【０００６】（３）前記線引炉収納ボックスの内圧より
も前記ガラスファイバ収納ボックスの内圧の方が高くな
るように制御し、線引炉から発生するダストがガラスフ
ァイバへ付着するのを防止することを特徴とする前記
（２）の光ファイバの製造方法。
（４）前記（１）における線引炉収納ボックス、若しく
は前記（２）又は（３）における線引炉収納ボックス及
びガラスファイバ収納ボックス内における直径０．５μ
ｍ以上のダスト数が３．５×１０3 個／ｍ3 以下となる
ように制御することを特徴とする光ファイバの製造方
法。(3) The internal pressure of the glass fiber storage box is controlled to be higher than the internal pressure of the drawing furnace storage box to prevent dust generated from the drawing furnace from adhering to the glass fiber. The method for producing an optical fiber according to (2) above. (4) Diameter of the drawing furnace storage box in (1) or the diameter of 0.5 μ in the drawing furnace storage box and the glass fiber storage box in (2) or (3).
A method for producing an optical fiber, characterized in that the number of dust particles of m or more is controlled to be 3.5 × 10 3 particles / m 3 or less.
【０００７】[0007]
【発明の実施の形態】本発明の方法においては、光ファ
イバ母材と線引炉、又は光ファイバ母材と線引炉に加え
て線引き直後から樹脂を被覆するまでの間のガラスファ
イバを収納ボックス内に収納し、該ボックス内に内部が
陽圧となるように（ボックス内が外部よりも高圧となる
ように）クリーンエアを導入することによって、ダスト
汚染を防止するようにしている。以下、図面を用いて本
発明の方法を説明する。BEST MODE FOR CARRYING OUT THE INVENTION In the method of the present invention, an optical fiber preform and a drawing furnace, or an optical fiber preform and a drawing furnace, and glass fibers are stored from immediately after drawing until resin coating. It is housed in a box, and clean air is introduced into the box so that the inside has a positive pressure (so that the inside of the box has a higher pressure than the outside) to prevent dust contamination. Hereinafter, the method of the present invention will be described with reference to the drawings.
【０００８】図１は本発明の１実施態様を模式的に示す
説明図である。図１において光ファイバ母材３は線引炉
２内で加熱軟化され、ガラスファイバ５として引き出さ
れる。ガラスファイバ５は冷却装置４を通って冷却さ
れ、樹脂被覆装置６で紫外線硬化型樹脂などのガラス保
護用の樹脂を被覆され光ファイバ７として巻き取られ
る。図１の例では、線引炉２と該炉内で溶融されている
光ファイバ母材３を線引炉収納ボックス１で囲み、ボッ
クス１内が陽圧になるよう、クリーンエアを導入する。
このとき、ボックス１内全体で直径０．５μｍ以上のダ
スト数が３．５×１０ 3 個／ｍ3 （１００個／ＣＦ、Ｃ
Ｆはｆｔ3 ）以下となるようクリーンエアの流量を調節
する。これにより、光ファイバ母材３及び線引炉２を出
てからボックス１を出るまでの間のガラスファイバ５の
周りはクリーンエア雰囲気となり、ダスト付着を防ぐこ
とができる。FIG. 1 schematically shows one embodiment of the present invention.
FIG. In FIG. 1, the optical fiber preform 3 is a drawing furnace.
It is heated and softened in 2 and pulled out as glass fiber 5.
Be done. The glass fiber 5 is cooled through the cooling device 4.
The resin coating device 6 is used to protect glass such as UV curable resin.
It is coated with protective resin and wound up as optical fiber 7.
It In the example of FIG. 1, the wire is drawn in the drawing furnace 2 and is melted in the furnace.
Enclose the optical fiber preform 3 in the drawing furnace storage box 1 and
Clean air is introduced so that the pressure inside the cus 1 becomes positive.
At this time, the entire box 1 has a diameter of 0.5 μm or more.
Number of strikes is 3.5 × 10 3Pieces / m3(100 / CF, C
F is ft3) Adjust the clean air flow rate so that
To do. As a result, the optical fiber preform 3 and the drawing furnace 2 are discharged.
Of the glass fiber 5 between
The surrounding area is in a clean air atmosphere to prevent dust adhesion.
You can
【０００９】また、線引炉２の直下から冷却装置４を経
て樹脂被覆装置６へとガラスファイバ５が通過する空間
を、線引炉２を囲む線引炉収納ボックス１と接続するよ
うにガラスファイバ収納ボックス７で囲み、ボックス７
内が陽圧状態になるよう、クリーンエアを導入する。ボ
ックス７内全体で直径０．５μｍ以上のダスト数が３．
５×１０3 個／ｍ3以下となるようクリーンエアの流量
を調節する。これにより、線引炉収納ボックス１を出た
後のガラスファイバ５へのダスト付着を防ぐことができ
る。冷却装置４は、通常、線引炉２から樹脂被覆装置６
までの間の複数個所でガラスファイバ５へＨｅガスなど
を吹き付ける形式のものが一般的であり、ガラスファイ
バ５を外部から遮蔽するものではないので、周囲をクリ
ーンエア雰囲気とすることによるダスト付着防止効果が
大きい。Further, the space through which the glass fiber 5 passes from immediately below the drawing furnace 2 to the resin coating device 6 via the cooling device 4 is connected to the drawing furnace storage box 1 surrounding the drawing furnace 2 so as to connect the glass. Surrounded by fiber storage box 7, box 7
Introduce clean air so that the inside becomes positive pressure. The number of dust particles with a diameter of 0.5 μm or more in the entire box 7 is 3.
Adjust the clean air flow rate so that it is 5 × 10 3 pieces / m 3 or less. As a result, it is possible to prevent dust from adhering to the glass fiber 5 after leaving the drawing furnace storage box 1. The cooling device 4 usually includes the drawing furnace 2 to the resin coating device 6
In general, a type in which He gas or the like is blown to the glass fiber 5 at a plurality of points between the above is not intended to shield the glass fiber 5 from the outside, so dust is prevented from adhering by creating a clean air atmosphere around the glass fiber 5. Great effect.
【００１０】また、ボックス１内よりもボックス７内の
方が陽圧となる（内圧が高くなる）ようクリーンエアの
導入量を調節することにより、線引炉２内から発生する
ダスト（カーボンダストやシリカダストなど）が、ガラ
スファイバ５が通過するボックス７内に侵入することを
防ぎ、ダストのガラスファイバ５への付着を防ぐことが
できる。Further, by adjusting the amount of clean air introduced so that the inside of the box 7 has a positive pressure (the inside pressure becomes higher) than the inside of the box 1, dust (carbon dust) generated from inside the drawing furnace 2 And silica dust) can be prevented from entering the box 7 through which the glass fiber 5 passes, and dust can be prevented from adhering to the glass fiber 5.
【００１１】[0011]
【実施例】以下、実施例により本発明の方法をさらに具
体的に説明する。
（比較例１）従来の構成の装置（図１において線引炉収
納ボックス１とガラスファイバ収納ボックス７がない構
成）を用いて線引き試験を行った。冷却装置は線引き後
のガラスファイバにＨｅガスを吹き付ける形式のもの
で、冷却部分の長さは２ｍとし、線引き速度４００ｍ／
分でガラス径１２５μｍの光ファイバを作製した。その
結果、ダスト汚染によるガラス径局所変動（中心値１２
５μｍに対して±０．５μｍを超えるもの）は１０００
ｋｍ当たり１５回、スクリーニング試験時の断線回数は
１０００ｋｍ当たり１０回であった。なお、ここでのス
クリーニング試験はファイバ長手方向に２％の引き伸び
率となる荷重（１．８〜２．２ｋｇｆ）を負荷して断線
の有無を調べるファイバ強度試験である。EXAMPLES The method of the present invention will be described in more detail below with reference to examples. (Comparative Example 1) A wire drawing test was performed using an apparatus having a conventional structure (a structure without the drawing furnace housing box 1 and the glass fiber housing box 7 in FIG. 1). The cooling device is of a type in which He gas is blown to the drawn glass fiber, the length of the cooling portion is 2 m, and the drawing speed is 400 m /
In a minute, an optical fiber having a glass diameter of 125 μm was produced. As a result, local fluctuations in glass diameter due to dust contamination (center value 12
1000 is more than ± 0.5μm for 5μm)
The number of disconnection was 15 times per km and 10 times per 1000 km during the screening test. The screening test here is a fiber strength test in which a load (1.8 to 2.2 kgf) having a tensile elongation of 2% is applied in the longitudinal direction of the fiber to check whether or not there is a break.
【００１２】（実施例１）図１の構成の装置を用いて線
引き試験を行った。比較例１との相違点は線引炉収納ボ
ックス１とガラスファイバ収納ボックス７を設置し、ボ
ックス１及びボックス７内へクリンーエアを導入した点
である。クリーンエアの導入は、それぞれのボックス内
部の直径０．５μｍ以上のダスト数が３．５×１０3 個
／ｍ3 以下となるように、直径０．５μｍ以上のダスト
数が３．５×１０3 個／ｍ3 以下のクリーンエアを導入
することによって行った。線引き中のボックス１及び７
の内圧は、ボックス７の内圧＞ボックス１の内圧＞大気
圧となるようにクリーンエア導入量を調節した。Example 1 A wire drawing test was conducted using the apparatus having the configuration shown in FIG. The difference from Comparative Example 1 is that the drawing furnace storage box 1 and the glass fiber storage box 7 are installed, and clean air is introduced into the boxes 1 and 7. Clean air is introduced so that the number of dust particles with a diameter of 0.5 μm or more is 3.5 × 10 3 particles / m 3 or less so that the number of dust particles with a diameter of 0.5 μm or more is 3.5 × 10 3 particles / m 3 or less. It was carried out by introducing clean air of 3 pieces / m 3 or less. Boxes 1 and 7 being drawn
As for the internal pressure, the clean air introduction amount was adjusted so that the internal pressure of the box 7> the internal pressure of the box 1> the atmospheric pressure.
【００１３】なお、クリーンエア中のダスト数はパーテ
ィクルカウンタ（Ｍｅｔ・Ｏｎｅ社製：小型多機能レー
ザパーティクルカウンタ：モデル２３７Ｂ）を用いて、
粒子からの散乱光強度の検出により測定した値である。
その結果、ダスト汚染によるガラス径局所変動は１００
０ｋｍ当たり０回、スクリーニング試験時の断線回数は
１０００ｋｍ当たり５回となり、クリーンエア導入の効
果が大きいことがわかる。The number of dust particles in the clean air is measured by using a particle counter (Met One Co., Ltd .: small multifunction laser particle counter: Model 237B).
It is a value measured by detecting the intensity of scattered light from particles.
As a result, the local variation in glass diameter due to dust contamination is 100
It can be seen that the effect of introducing clean air is great, with 0 breaks per 0 km and 5 breaks per 1000 km during the screening test.
【００１４】[0014]
【発明の効果】本発明の方法によれば、光ファイバの線
引き時のダスト汚染を抑制することができ、ダスト汚染
によるガラス径の局所変動やスクリーニング試験時の断
線回数が少ない光ファイバを容易に製造することができ
る。Industrial Applicability According to the method of the present invention, it is possible to suppress dust contamination during drawing of an optical fiber, and it is possible to easily provide an optical fiber in which local fluctuations in the glass diameter due to dust contamination and the number of disconnections during a screening test are small. It can be manufactured.
【図１】本発明の１実施態様を模式的に示す説明図。FIG. 1 is an explanatory view schematically showing one embodiment of the present invention.
【符号の説明】
１ 線引炉収納ボックス ２ 線引炉 ３ 光ファ
イバ母材
４ 冷却装置 ５ ガラスファイバ ６ 樹脂被覆
装置
７ ガラスファイバ収納ボックス ８ 光ファイバ[Explanation of reference numerals] 1 drawing furnace storage box 2 drawing furnace 3 optical fiber preform 4 cooling device 5 glass fiber 6 resin coating device 7 glass fiber storage box 8 optical fiber
Claims (4)
ラスファイバをガラス保護用の樹脂で被覆する光ファイ
バの製造方法において、線引炉と線引炉外に出ている光
ファイバ母材を囲む線引炉収納ボックスを設け、該線引
炉収納ボックスに内部が陽圧となるようにクリーンエア
を導入し、光ファイバ母材及びガラスファイバへのダス
ト付着を防止することを特徴とする光ファイバの製造方
法。1. A method of manufacturing an optical fiber in which an optical fiber preform is drawn and the obtained glass fiber is coated with a resin for glass protection, in which a drawing furnace and an optical fiber preform that is outside the drawing furnace are used. A surrounding drawing furnace storage box is provided, and clean air is introduced into the drawing furnace storage box so that the inside has a positive pressure, and dust adhesion to the optical fiber preform and the glass fiber is prevented. Fiber manufacturing method.
ラスファイバをガラス保護用の樹脂で被覆する光ファイ
バの製造方法において、線引炉と線引炉外に出ている光
ファイバ母材を囲む線引炉収納ボックスと、線引炉収納
ボックスから冷却装置を経て樹脂被覆装置に至るまでの
ガラスファイバ及び冷却装置を囲むガラスファイバ収納
ボックスとを設け、該線引炉収納ボックス及びガラスフ
ァイバ収納ボックスのそれぞれに内部が陽圧となるよう
にクリーンエアを導入し、光ファイバ母材及びガラスフ
ァイバへのダスト付着を防止することを特徴とする光フ
ァイバの製造方法。2. A method for manufacturing an optical fiber, comprising drawing an optical fiber preform and coating the obtained glass fiber with a glass-protecting resin, wherein a drawing furnace and an optical fiber preform that is outside the drawing furnace are used. A surrounding drawing furnace storage box and a glass fiber storage box surrounding the glass fiber and the cooling device from the drawing furnace storage box through the cooling device to the resin coating device are provided, and the drawing furnace storage box and the glass fiber storage are provided. A method for producing an optical fiber, characterized in that clean air is introduced into each of the boxes so that the inside has a positive pressure to prevent dust from adhering to the optical fiber preform and the glass fiber.
記ガラスファイバ収納ボックスの内圧の方が高くなるよ
うに制御し、線引炉から発生するダストがガラスファイ
バへ付着するのを防止することを特徴とする請求項２に
記載の光ファイバの製造方法。3. The internal pressure of the glass fiber storage box is controlled to be higher than the internal pressure of the drawing furnace storage box to prevent dust generated from the drawing furnace from adhering to the glass fiber. The optical fiber manufacturing method according to claim 2.
若しくは請求項２又は３における線引炉収納ボックス及
びガラスファイバ収納ボックス内における直径０．５μ
ｍ以上のダスト数が３．５×１０3 個／ｍ3 以下となる
ように制御することを特徴とする光ファイバの製造方
法。4. The drawing furnace storage box according to claim 1,
Alternatively, the diameter in the drawing furnace storage box and the glass fiber storage box in claim 2 or 3 is 0.5 μm.
A method for producing an optical fiber, characterized in that the number of dust particles of m or more is controlled to be 3.5 × 10 3 particles / m 3 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001236246A JP4465932B2 (en) | 2001-08-03 | 2001-08-03 | Optical fiber manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001236246A JP4465932B2 (en) | 2001-08-03 | 2001-08-03 | Optical fiber manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003048739A true JP2003048739A (en) | 2003-02-21 |
| JP4465932B2 JP4465932B2 (en) | 2010-05-26 |
Family
ID=19067554
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001236246A Expired - Lifetime JP4465932B2 (en) | 2001-08-03 | 2001-08-03 | Optical fiber manufacturing method |
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| Country | Link |
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| JP (1) | JP4465932B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010168247A (en) * | 2009-01-22 | 2010-08-05 | Sumitomo Electric Ind Ltd | Method and apparatus for producing optical fiber |
| JP2011236071A (en) * | 2010-05-07 | 2011-11-24 | Sumitomo Electric Ind Ltd | Optical fiber drawing method and optical fiber drawing apparatus |
| JP2012006797A (en) * | 2010-06-25 | 2012-01-12 | Sumitomo Electric Ind Ltd | Method for producing optical fiber |
| US10308541B2 (en) | 2014-11-13 | 2019-06-04 | Gerresheimer Glas Gmbh | Glass forming machine particle filter, a plunger unit, a blow head, a blow head support and a glass forming machine adapted to or comprising said filter |
| CN114082713A (en) * | 2021-11-23 | 2022-02-25 | 江东科技有限公司 | Tool and system for cleaning optical fiber drawing channel |
| WO2022244869A1 (en) * | 2021-05-21 | 2022-11-24 | 住友電気工業株式会社 | Method for producing optical fiber and apparatus for producing optical fiber |
-
2001
- 2001-08-03 JP JP2001236246A patent/JP4465932B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010168247A (en) * | 2009-01-22 | 2010-08-05 | Sumitomo Electric Ind Ltd | Method and apparatus for producing optical fiber |
| JP2011236071A (en) * | 2010-05-07 | 2011-11-24 | Sumitomo Electric Ind Ltd | Optical fiber drawing method and optical fiber drawing apparatus |
| JP2012006797A (en) * | 2010-06-25 | 2012-01-12 | Sumitomo Electric Ind Ltd | Method for producing optical fiber |
| US10308541B2 (en) | 2014-11-13 | 2019-06-04 | Gerresheimer Glas Gmbh | Glass forming machine particle filter, a plunger unit, a blow head, a blow head support and a glass forming machine adapted to or comprising said filter |
| WO2022244869A1 (en) * | 2021-05-21 | 2022-11-24 | 住友電気工業株式会社 | Method for producing optical fiber and apparatus for producing optical fiber |
| CN114082713A (en) * | 2021-11-23 | 2022-02-25 | 江东科技有限公司 | Tool and system for cleaning optical fiber drawing channel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4465932B2 (en) | 2010-05-26 |
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