JP3076441B2 - Method for judging degree of curing of ultraviolet curable resin coated on optical fiber - Google Patents
Method for judging degree of curing of ultraviolet curable resin coated on optical fiberInfo
- Publication number
- JP3076441B2 JP3076441B2 JP04053604A JP5360492A JP3076441B2 JP 3076441 B2 JP3076441 B2 JP 3076441B2 JP 04053604 A JP04053604 A JP 04053604A JP 5360492 A JP5360492 A JP 5360492A JP 3076441 B2 JP3076441 B2 JP 3076441B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- curing
- degree
- curable resin
- ultraviolet
- 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
- 239000013307 optical fiber Substances 0.000 title claims description 32
- 229920005989 resin Polymers 0.000 title claims description 32
- 239000011347 resin Substances 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 18
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 11
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007654 immersion Methods 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Landscapes
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光ファイバに被覆され
た紫外線硬化型樹脂の硬化度を判定する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining the degree of curing of an ultraviolet curable resin coated on an optical fiber.
【０００２】[0002]
【従来の技術】近年、光ファイバの保護被覆材料とし
て、紫外線硬化型樹脂が従来のシリコーン樹脂やナイロ
ンに代わってその高速硬化性から主流になりつつある。2. Description of the Related Art In recent years, as a protective coating material for optical fibers, ultraviolet curable resins have become mainstream because of their high-speed curability in place of conventional silicone resins and nylons.
【０００３】しかして、この紫外線硬化型樹脂は、高速
硬化性とはいえ、その硬化度は、製造ラインにおける紫
外線ランプの出力の経時変化、雰囲気の温度や酸素量、
線速などによって変化し、光ファイバの諸特性ばかりで
なく、製造工程の安定にも大きく影響することが知られ
ている。[0003] Although this ultraviolet-curable resin has high-speed curability, its degree of curing depends on the time-dependent change of the output of the ultraviolet lamp in the production line, the temperature of the atmosphere, the amount of oxygen, and the like.
It is known that it changes depending on the linear velocity and the like, and greatly affects not only various characteristics of the optical fiber but also the stability of the manufacturing process.
【０００４】このため、従来より、光ファイバに被覆さ
れた紫外線硬化型樹脂の硬化度を測定し、管理すること
が行われている。For this reason, conventionally, the degree of curing of an ultraviolet curable resin coated on an optical fiber has been measured and managed.
【０００５】この種の技術としては、ゲル分率を測定す
る方法や、ヤング率を直接測定する方法のほか、微少硬
度計により硬度を測定する方法（特開平3-105233号公報
参照）、誘電緩和スペクトルを測定する方法（特開平3-
53152 号公報参照）、フォトカロリメトリー（ＵＶ−Ｄ
ＳＣ）を用いて紫外線照射による反応熱から算出する、
いわゆるＵＶ−ＤＳＣ法と呼ばれる方法（特開平2-2297
41号公報参照）などが知られている。Examples of this type of technique include a method of measuring the gel fraction, a method of directly measuring the Young's modulus, a method of measuring the hardness with a micro hardness tester (see JP-A-3-105233), Method for measuring relaxation spectrum
53152), photocalorimetry (UV-D
SC) to calculate from the heat of reaction due to ultraviolet irradiation,
A method called a so-called UV-DSC method (Japanese Patent Laid-Open No. 2-2297)
No. 41) is known.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、このよ
うな従来から知られる方法は、いずれも、試料の作成な
ど操作に手間と時間がかかり、製造ラインでの、光ファ
イバに被覆された紫外線硬化型樹脂の硬化度の管理に用
いるには、あまり適当ではなかった。However, in all of the methods known in the art, the operation such as the preparation of a sample requires time and effort, and the ultraviolet curing type coated on the optical fiber in the production line. It was not very suitable for use in controlling the degree of cure of the resin.
【０００７】本発明はこのような点に対処してなされた
もので、光ファイバに被覆された紫外線硬化型樹脂の硬
化度を容易かつ短時間に、しかも精度良く判定すること
ができ、製造ラインにて随時判定する場合にも十分に対
応し得る方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is capable of easily, quickly and accurately determining the degree of curing of an ultraviolet curable resin coated on an optical fiber. It is an object of the present invention to provide a method that can sufficiently cope with a case where the determination is made at any time.
【０００８】[0008]
【課題を解決するための手段】本発明は、光ファイバに
被覆された紫外線硬化型樹脂の硬化度を判定する方法に
おいて、紫外線硬化型樹脂が被覆された前記光ファイバ
を溶剤に浸漬し、この浸漬によって生じる前記紫外線硬
化型樹脂被覆の物理的変化を定量的に測定し、予め求め
ておいた硬化度既知の標準試料のそれと比較して硬化度
を判定することを特徴とするものである。According to the present invention, there is provided a method for determining the degree of curing of an ultraviolet-curable resin coated on an optical fiber, the method comprising immersing the optical fiber coated with the ultraviolet-curable resin in a solvent. It is characterized in that a physical change of the ultraviolet-curable resin coating caused by immersion is quantitatively measured, and the degree of curing is determined by comparing it with that of a standard sample of which degree of curing is known in advance.
【０００９】このような方法によって、光ファイバに被
覆された紫外線硬化型樹脂の硬化度を判定することがで
きるとした理由は、以下の通りである。The reason that the degree of curing of the ultraviolet curable resin coated on the optical fiber can be determined by such a method is as follows.
【００１０】すなわち、紫外線硬化型樹脂が被覆された
前記光ファイバを、たとえばメチルエチルケトンのよう
な溶剤に浸漬することにより、被覆の剥離や膨れといっ
た物理的変化を生ずる。そして、この変化は、後述する
実施例にも示したように、被覆を構成する紫外線硬化型
樹脂の硬化度に相関する。したがって、このような変化
を定量的に測定し、予め求めておいた硬化度既知の標準
試料のそれと比較することにより、硬化度を精度よく判
定することができる。That is, by immersing the optical fiber coated with the ultraviolet curable resin in a solvent such as methyl ethyl ketone, a physical change such as peeling or swelling of the coating occurs. This change correlates with the degree of curing of the ultraviolet curable resin constituting the coating, as shown in the examples described later. Therefore, the degree of cure can be accurately determined by quantitatively measuring such a change and comparing it with that of a standard sample whose degree of cure is known in advance.
【００１１】なお、本発明に用いられる溶剤としては、
上述したメチルエチルケトンの他、クロロホルム、酢酸
エチル、酢酸、アクリル酸、トルエンなど、浸漬による
紫外線硬化型樹脂被覆の物理的変化が、常温で短時間に
かつ明瞭に現われるものが好ましいが、特にこれらに限
定されるものではなく、一般に溶剤として使用されてい
るものの中から任意に選択して使用することができる。The solvent used in the present invention includes:
In addition to the above-mentioned methyl ethyl ketone, chloroform, ethyl acetate, acetic acid, acrylic acid, toluene and the like, physical changes of the UV-curable resin coating due to immersion, those which appear clearly and in a short time at room temperature are preferable, but particularly limited to these. However, it can be arbitrarily selected from those generally used as solvents.
【００１２】また、測定対象とする紫外線硬化型樹脂被
覆の変化としては、たとえば被覆が光ファイバから剥離
する時間や、被覆に膨らみを生ずる時間などが、測定が
容易なことから望ましい。As the change of the ultraviolet-curable resin coating to be measured, for example, the time required for the coating to be peeled off from the optical fiber and the time required for the coating to swell are desirable because the measurement is easy.
【００１３】なお、溶剤への浸漬時間その他の条件は、
溶剤の種類や、測定対象などによって適宜定められる。[0013] The immersion time in the solvent and other conditions are as follows.
It is appropriately determined depending on the type of the solvent, the measurement target, and the like.
【００１４】本発明においては、線速を変えるなどの方
法で紫外線の照射量を変化させて、硬化度の異なる複数
の標準試料を作製し、これらの各試料を溶剤に浸漬し
て、それにともなう物理的変化を定量的に測定して、予
め硬化度と物理的変化との相関を求めておき、この結果
を基に、硬化度未知の試料について、同様に溶剤に浸漬
して求めた物理的変化量から、当該試料の硬化度が判定
される。In the present invention, a plurality of standard samples having different degrees of curing are prepared by changing the irradiation amount of ultraviolet rays by, for example, changing the linear velocity, and each of these samples is immersed in a solvent. The physical change was quantitatively measured, the correlation between the degree of cure and the physical change was determined in advance, and based on this result, the physical degree of the sample whose degree of cure was unknown was similarly immersed in a solvent. From the amount of change, the degree of cure of the sample is determined.
【００１５】[0015]
【作用】本発明の方法においては、紫外線硬化型樹脂が
被覆された光ファイバを、そのまま溶剤に浸漬し、その
浸漬にともなう被覆の物理的変化を定量的に測定し、そ
の結果を標準試料のそれと比較するだけなので、特別な
試料作成の必要はなく、容易に光ファイバに被覆された
紫外線硬化型樹脂の硬化度を判定することができる。し
たがって、光ファイバ心線製造ラインでの光ファイバ上
に被覆された紫外線硬化型樹脂の硬化度の管理に適して
いる。In the method of the present invention, an optical fiber coated with an ultraviolet curable resin is immersed in a solvent as it is, and the physical change of the coating accompanying the immersion is quantitatively measured. Since only the comparison is made, there is no need to prepare a special sample, and it is possible to easily determine the degree of curing of the ultraviolet curable resin coated on the optical fiber. Therefore, it is suitable for controlling the degree of curing of the ultraviolet curable resin coated on the optical fiber in the optical fiber core production line.
【００１６】[0016]
【実施例】次に本発明の実施例について記載する。Next, examples of the present invention will be described.
【００１７】実施例 外径 125μｍの光ファイバ上に、紫外線硬化型樹脂とし
てウレタン−アクリレート樹脂を被覆し、 3kw紫外線ラ
ンプを用いて紫外線を照射して、外径 250μｍの光ファ
イバ心線を製造した。このとき線速を変えて、紫外線硬
化型樹脂の硬化度を異ならせるようにした。EXAMPLE An optical fiber having an outer diameter of 250 μm was manufactured by coating an optical fiber having an outer diameter of 125 μm with a urethane-acrylate resin as an ultraviolet-curable resin and irradiating ultraviolet rays using a 3 kw ultraviolet lamp. . At this time, the degree of curing of the ultraviolet curable resin was changed by changing the linear velocity.
【００１８】このようにして得られた光ファイバ心線か
ら、硬化度の異なる試料を採取し、長さ10cmに切断した
ものをそれぞれ、25℃のメチルエチルケトン液に浸漬し
て、各試料の紫外線硬化型樹脂被覆が光ファイバから完
全に剥離するまでの時間（剥離時間）を測定した。Samples having different degrees of curing were obtained from the optical fiber core wires thus obtained, and cut into pieces each having a length of 10 cm, each of which was immersed in a methyl ethyl ketone solution at 25 ° C. to cure each sample with ultraviolet light. The time (peeling time) until the mold resin coating was completely peeled from the optical fiber was measured.
【００１９】一方、これらの各試料について、ＵＶ−Ｄ
ＳＣ法により硬化度を測定した。On the other hand, for each of these samples, UV-D
The degree of cure was measured by the SC method.
【００２０】図１のグラフは、このようにして測定され
た結果を、硬化度を横軸に剥離時間を縦軸にとってプロ
ットしたもので、グラフからも明らかなように、剥離時
間は硬化度によく相関していた。The graph of FIG. 1 is obtained by plotting the results measured in this manner with the degree of cure on the horizontal axis and the peel time on the vertical axis. Well correlated.
【００２１】このことは、光ファイバ上に被覆された紫
外線硬化型樹脂の剥離時間を測定し、その結果を予め求
めておいた硬化度と剥離時間との関係を示すグラフにあ
てはめることによって、硬化度を精度よく判定すること
ができることを示しており、また、光ファイバ心線製造
ラインにおいて、かかる剥離時間を随時繰り返し測定す
ることにより、紫外線硬化型樹脂被覆の硬化度の変動を
知ることができ、光ファイバ上に被覆された紫外線硬化
型樹脂の硬化度を適確に管理して、光ファイバ心線の品
質の向上、製造工程の安定化を図ることができることを
示している。This is achieved by measuring the peeling time of the ultraviolet curable resin coated on the optical fiber and applying the result to a previously determined graph showing the relationship between the degree of curing and the peeling time. It is shown that the degree can be accurately determined, and in the optical fiber core production line, by repeatedly measuring the peeling time as needed, it is possible to know the change in the degree of curing of the ultraviolet curable resin coating. It shows that the degree of curing of the ultraviolet curable resin coated on the optical fiber can be properly controlled to improve the quality of the optical fiber core and stabilize the manufacturing process.
【００２２】ちなみに、上記結果を基に、随時、上記と
同様にして、紫外線硬化型樹脂被覆の剥離時間を測定す
ることによって、その硬化度を管理しながら、上記製造
ラインで、同一構成の光ファイバ心線を製造したとこ
ろ、所望の硬化度を有する品質のよい光ファイバ心線を
安定して製造することができた。Incidentally, based on the above results, the peeling time of the UV-curable resin coating is measured at any time in the same manner as described above, and the degree of curing is controlled. When a fiber core was manufactured, a high-quality optical fiber having a desired degree of curing could be stably manufactured.
【００２３】[0023]
【発明の効果】以上の実施例からも明らかなように、本
発明によれば、光ファイバに被覆された紫外線硬化型樹
脂の硬化度を、容易に、しかも精度よく判定することが
できる。As is clear from the above embodiments, according to the present invention, the degree of curing of the ultraviolet curable resin coated on the optical fiber can be easily and accurately determined.
【００２４】したがって、光ファイバ心線製造ラインで
の、紫外線硬化型樹脂被覆の硬化度の管理に有用で、光
ファイバ心線の品質の向上、安定化を容易に図ることが
できる。Therefore, it is useful for controlling the degree of curing of the ultraviolet curable resin coating on the optical fiber core production line, and the quality of the optical fiber core can be easily improved and stabilized.
【図１】光ファイバに被覆された紫外線硬化型樹脂の硬
化度と、溶剤への浸漬にともなって生じる紫外線硬化型
樹脂被覆の剥離時間との関係を示すグラフ。FIG. 1 is a graph showing the relationship between the degree of curing of an ultraviolet-curable resin coated on an optical fiber and the peeling time of the ultraviolet-curable resin coating caused by immersion in a solvent.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−51751（ＪＰ，Ａ) 特開 平３−63557（ＪＰ，Ａ) 特開 平６−144879（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C03C 25/10 - 25/28 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-51751 (JP, A) JP-A-3-63557 (JP, A) JP-A-6-144879 (JP, A) (58) Field (Int.Cl. 7 , DB name) C03C 25/10-25/28
Claims (1)
脂の硬化度を判定する方法において、 紫外線硬化型樹脂が被覆された前記光ファイバを溶剤に
浸漬し、この浸漬によって生じる前記紫外線硬化型樹脂
被覆の物理的変化を定量的に測定し、予め求めておいた
硬化度既知の標準試料のそれと比較して硬化度を判定す
ることを特徴とする光ファイバに被覆された紫外線硬化
型樹脂の硬化度判定方法1. A method for determining the degree of curing of an ultraviolet-curable resin coated on an optical fiber, comprising: immersing the optical fiber coated with the ultraviolet-curable resin in a solvent; Curing of UV-curable resin coated on an optical fiber, characterized by quantitatively measuring the physical change of the coating and comparing it with that of a standard sample whose curing degree is known in advance and determining the degree of curing. Degree judgment method
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04053604A JP3076441B2 (en) | 1992-03-12 | 1992-03-12 | Method for judging degree of curing of ultraviolet curable resin coated on optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04053604A JP3076441B2 (en) | 1992-03-12 | 1992-03-12 | Method for judging degree of curing of ultraviolet curable resin coated on optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0640747A JPH0640747A (en) | 1994-02-15 |
| JP3076441B2 true JP3076441B2 (en) | 2000-08-14 |
Family
ID=12947493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04053604A Expired - Lifetime JP3076441B2 (en) | 1992-03-12 | 1992-03-12 | Method for judging degree of curing of ultraviolet curable resin coated on optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3076441B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6939659B2 (en) * | 2018-03-13 | 2021-09-22 | 住友電気工業株式会社 | Optical fiber manufacturing method |
-
1992
- 1992-03-12 JP JP04053604A patent/JP3076441B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0640747A (en) | 1994-02-15 |
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