JPS6341817A - Production of optical fiber cable - Google Patents
Production of optical fiber cableInfo
- Publication number
- JPS6341817A JPS6341817A JP61186386A JP18638686A JPS6341817A JP S6341817 A JPS6341817 A JP S6341817A JP 61186386 A JP61186386 A JP 61186386A JP 18638686 A JP18638686 A JP 18638686A JP S6341817 A JPS6341817 A JP S6341817A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- protective layer
- fiber cable
- extrusion
- tensile strength
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000011241 protective layer Substances 0.000 claims abstract description 13
- 238000007765 extrusion coating Methods 0.000 claims abstract description 11
- 238000010008 shearing Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 14
- 125000003118 aryl group Chemical group 0.000 claims description 5
- 239000012783 reinforcing fiber Substances 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 229920001225 polyester resin Polymers 0.000 abstract description 5
- 239000004645 polyester resin Substances 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 229920002050 silicone resin Polymers 0.000 abstract description 2
- 229920002313 fluoropolymer Polymers 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、機械的強度に優れた光ファイバケーブルの製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing an optical fiber cable with excellent mechanical strength.
従来から高強度光ファイバケーブルとして第２図のよう
なものがよく知られている。これは１本又は複数本の光
ファイバ１からなるケーブルコア９の外側に繊維強化プ
ラスチックからなる抗張力保護層２ （ＦＲＰＦＪとい
う）を施して機械的強度、なかんずく引張強度を高めた
もので、通常ＦＲＰ心線とも呼ばれている。Conventionally, a high-strength optical fiber cable as shown in FIG. 2 has been well known. This is a cable core 9 made of one or more optical fibers 1, and a tensile strength protection layer 2 (referred to as FRPFJ) made of fiber reinforced plastic applied to the outside to increase mechanical strength, especially tensile strength. Also called the core line.
ところでこのＦＲＰ心線において保護層２を設ける場合
、通常はマトリックス樹脂として熱硬化性樹脂を、補強
線としてはガラス繊維を用い、成形金型による引抜加工
により被覆する方法が採られている。By the way, when providing the protective layer 2 on this FRP core wire, a method is usually adopted in which a thermosetting resin is used as the matrix resin, glass fiber is used as the reinforcing wire, and the coating is carried out by drawing with a molding die.
ところがこの方法は製造線速が上げられない、製造中に
光ファイバの伝送損失が増加し易い等生産性が悪く、コ
スト高が避けられないという問題があった。However, this method has problems in that the manufacturing speed cannot be increased and the transmission loss of the optical fiber tends to increase during manufacturing, resulting in poor productivity and unavoidable high costs.
前記問題に鑑み本発明の目的は、機械的強度に優れた光
ファイバケーブルをより容易に、しかもより低コストで
！！！！造できる方法を提供することにある。In view of the above problems, an object of the present invention is to easily produce optical fiber cables with excellent mechanical strength and at a lower cost! ! ! ! The goal is to provide a method that can be used to create
前記目的を達成すべく本発明は、１本又は複数本の光フ
ァイバを有するケーブルコアの外側に抗張力保護層を被
覆せしめる光ファイバケーブルの製造方法において、前
記抗張力保護層を押出被覆により形成することを特徴と
するものである。In order to achieve the above object, the present invention provides a method for manufacturing an optical fiber cable in which a tensile strength protective layer is coated on the outside of a cable core having one or more optical fibers, including forming the tensile strength protective layer by extrusion coating. It is characterized by:
（発明の実施例） 以下に本発明を図を参照して詳細に説明する。(Example of the invention) The present invention will be explained in detail below with reference to the drawings.
第１図は本発明の方法を示す概略図である。FIG. 1 is a schematic diagram illustrating the method of the invention.
本図が示すように本発明の方法は、まず１本又は複数本
の光ファイバに必要に応じてシリコン樹脂等からなる一
括被覆又は拝啓等を施したケーブルコア９を送出機３に
よりサプライし、これに押出被覆機４により、例えば全
芳香族ポリエステル系樹脂からなる抗張力保護層２を押
出被覆せしめ、これを冷却槽６で冷却し、引取ｅｌ？で
引取り、巻取機８で巻き取るものである。ここで全芳香
族ポリエステル系樹脂を使用する理由は、該樹脂は押出
時に受ける剪断応力で実質的に分子が配向し引張強度が
格段に向上するためである。尚、前記全芳香族ポリエス
テル系樹脂に予め短ｍｍ化したガラス繊維、カーボン繊
維等の補強繊維を混入せしめておいて押出被覆機４で押
出被覆すると、その機械的強度はさらに向上するので好
ましい。As shown in this figure, the method of the present invention first supplies one or more optical fibers with a cable core 9, which is coated with a silicone resin or the like as required, by a sending machine 3; A tensile strength protective layer 2 made of, for example, a wholly aromatic polyester resin is extruded and coated on this using an extrusion coating machine 4, and this is cooled in a cooling tank 6 and then collected. It is taken up by a winder 8 and wound up by a winder 8. The reason why a wholly aromatic polyester resin is used here is that the molecules of this resin are substantially oriented by the shear stress applied during extrusion, and the tensile strength is significantly improved. It is preferable to pre-mix reinforcing fibers such as glass fibers or carbon fibers into the wholly aromatic polyester resin and then extrusion coat the resin with the extrusion coater 4, as this further improves the mechanical strength.
また前記全芳香族ポリエステル樹脂のほかに、フッ素系
樹脂に前記短繊維化した補強繊維を混入しておいて押出
被覆せしめても同様の効果を得ることができる。尚、図
で符号５は押出被覆機４に樹脂を供給するホッパーを示
し、前述の如く補強繊維を樹脂に混入する場合はこのホ
ッパー５に樹脂ペレットと補強繊維を混合せしめたもの
を供給する。Furthermore, in addition to the fully aromatic polyester resin, the same effect can be obtained by mixing the short reinforcing fibers into a fluororesin and extrusion coating the mixture. In the figure, reference numeral 5 indicates a hopper for supplying resin to the extrusion coating machine 4, and when reinforcing fibers are mixed into the resin as described above, a mixture of resin pellets and reinforcing fibers is supplied to this hopper 5.
このようにしてなる本発明によれば、抗張力保護層２を
従来の如く金型による引抜加工によらず押出被覆方法に
より被覆するため、製造速度が格段に速くできる。しか
も従来の場合、引抜加工中に内部の光ファイバに異常な
側圧が付加され光ファイバの伝送損失が増加する、とい
った事態が起こり易かったが、本方法ではそのようなこ
とが発生し難いという効果もある。According to the present invention thus constructed, the tensile strength protective layer 2 is coated by an extrusion coating method instead of drawing using a mold as in the conventional method, so that the manufacturing speed can be significantly increased. Moreover, in the conventional case, abnormal lateral pressure was applied to the internal optical fiber during the drawing process, which tended to increase the transmission loss of the optical fiber, but with this method, such a situation is unlikely to occur. There is also.
その結果機械強度および伝送特性共に優れた光ファイバ
ケーブルを容易にかつ低コストで製造できるようになっ
た。As a result, optical fiber cables with excellent mechanical strength and transmission characteristics can be manufactured easily and at low cost.
前述の如く本発明の方法によれば、機械強度及び伝送特
性共に優れた光ファイバケーブルを容易かつ低コストで
製造できる。As described above, according to the method of the present invention, an optical fiber cable having excellent mechanical strength and transmission characteristics can be manufactured easily and at low cost.
第１図は本発明の製造方法の一実施例を示す概略図、第
２図は本発明に係わる光ファイバケーブルの一例を示す
横断面図である。
１〜光フアイバ ２〜抗張力保！ｌ！ｔｉｌ！ ４〜
押出被覆機
特許出願人 古河電気工業株式会社第１図
第２図FIG. 1 is a schematic view showing an embodiment of the manufacturing method of the present invention, and FIG. 2 is a cross-sectional view showing an example of the optical fiber cable according to the present invention. 1~ Optical fiber 2~ Maintains tensile strength! l! Till! 4～
Extrusion coating machine patent applicant Furukawa Electric Co., Ltd. Figure 1 Figure 2
Claims (4)
アの外側に抗張力保護層を被覆せしめる光ファイバケー
ブルの製造方法において、前記抗張力保護層を押出被覆
により形成することを特徴とする光ファイバケーブルの
製造方法。(1) A method for manufacturing an optical fiber cable in which a tensile strength protective layer is coated on the outside of a cable core having one or more optical fibers, characterized in that the tensile strength protective layer is formed by extrusion coating. manufacturing method.
質的に分子が配向していることを特徴とする特許請求の
範囲第１項記載の光ファイバケーブル。(2) The optical fiber cable according to claim 1, wherein molecules of the tensile strength protective layer are substantially oriented due to shearing force during extrusion coating.
ることを特徴とする特許請求の範囲第１項又は第２項記
載の光ファイバケーブルの製造方法。(3) The method for manufacturing an optical fiber cable according to claim 1 or 2, wherein the tensile strength protective layer is made of wholly aromatic polyester.
からなることを特徴とする特許請求の範囲第１項記載の
光ファイバケーブルの製造方法。(4) The method for manufacturing an optical fiber cable according to claim 1, wherein the tensile strength protective layer is made of a fluororesin containing reinforcing fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61186386A JPS6341817A (en) | 1986-08-08 | 1986-08-08 | Production of optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61186386A JPS6341817A (en) | 1986-08-08 | 1986-08-08 | Production of optical fiber cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6341817A true JPS6341817A (en) | 1988-02-23 |
Family
ID=16187483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61186386A Pending JPS6341817A (en) | 1986-08-08 | 1986-08-08 | Production of optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6341817A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5021696A (en) * | 1989-09-14 | 1991-06-04 | Ford Motor Company | Cooling fan with reduced noise for variable speed machinery |
-
1986
- 1986-08-08 JP JP61186386A patent/JPS6341817A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5021696A (en) * | 1989-09-14 | 1991-06-04 | Ford Motor Company | Cooling fan with reduced noise for variable speed machinery |
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