JPH03105233A - Quantification of hardening degree for optical fiber cover material - Google Patents
Quantification of hardening degree for optical fiber cover materialInfo
- Publication number
- JPH03105233A JPH03105233A JP24441289A JP24441289A JPH03105233A JP H03105233 A JPH03105233 A JP H03105233A JP 24441289 A JP24441289 A JP 24441289A JP 24441289 A JP24441289 A JP 24441289A JP H03105233 A JPH03105233 A JP H03105233A
- Authority
- JP
- Japan
- Prior art keywords
- degree
- hardening
- optical fiber
- fiber
- layer
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title claims description 12
- 238000011002 quantification Methods 0.000 title description 2
- 239000003365 glass fiber Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 abstract description 13
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract 1
- 229910003460 diamond Inorganic materials 0.000 abstract 1
- 239000010432 diamond Substances 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 23
- 229920005989 resin Polymers 0.000 description 20
- 239000011347 resin Substances 0.000 description 20
- 238000001723 curing Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 11
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000003848 UV Light-Curing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 ester acrylate Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000005383 fluoride glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/386—Glass
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
Description
【発明の詳細な説明】
イ，発明の目的
〔産業上の利用分野〕
本発明はガラスファイバに有機物被覆を施した光ファイ
バの被覆材の硬化度を定量化する方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention [Field of Industrial Application] The present invention relates to a method for quantifying the degree of hardening of a coating material of an optical fiber in which a glass fiber is coated with an organic substance.
通信用の光ファイバは、ガラス母材を紡糸した後に、高
分子物質が被覆されて機械的強度が付与される。第２図
は一般的な光伝送用ファイバの斜視図である。Optical fibers for communications are spun from a glass base material and then coated with a polymeric substance to provide mechanical strength. FIG. 2 is a perspective view of a general optical transmission fiber.
シリカガラス、フッ化物ガラス等からなるガラスファイ
バｌ、その外側にソフト層２、その外側にはハごド層３
が被覆され、単心の光ファイバ４を構成する。Glass fiber 1 made of silica glass, fluoride glass, etc., a soft layer 2 on the outside, and a hardware layer 3 on the outside
is coated to form a single optical fiber 4.
ここで、ソフト層２はガラスファイバｌに対するクッシ
ョンの役目を果たすもので、柔軟性のある樹脂が用いら
れる。具体的には熱硬化シリコーン、紫外線（ＵＶ）硬
化シリコーン、ＵＶ硬化ウレタンアクリレート、ＵＶ硬
化エポキシアクリレート、ＵＶ硬化エステルアクリレー
トなどである。ハード層３はソフト層２の外側からガラ
スファイバ１を更に保護するもので、強靭な樹脂が用い
られる。具体的にはポリアミド、ポリエステル、ＡＢＳ
樹脂、ポリアセタール樹脂などの押出樹脂や、各種のＵ
Ｖ硬化樹脂である。これに対して従来より、被覆材料が
ガラスファイバの伝送特性に大きな影響を与えることは
知られており、特に、被覆材料の残留加工歪である収縮
力あるいは膨張力がガラスファイバに働き、ガラスファ
イバにマイクロペンディングを生じさせたりして、伝送
特性劣化の原因になることが報告されている。Here, the soft layer 2 serves as a cushion for the glass fiber 1, and is made of flexible resin. Specific examples include thermosetting silicone, ultraviolet (UV) curing silicone, UV curing urethane acrylate, UV curing epoxy acrylate, and UV curing ester acrylate. The hard layer 3 further protects the glass fiber 1 from the outside of the soft layer 2, and is made of tough resin. Specifically, polyamide, polyester, ABS
resin, extruded resin such as polyacetal resin, and various U
It is a V-curing resin. On the other hand, it has long been known that the coating material has a great effect on the transmission characteristics of glass fibers. In particular, the shrinkage force or expansion force, which is the residual processing strain of the coating material, acts on the glass fiber, causing the glass fiber to It has been reported that micro-pending may occur in the transmission, resulting in deterioration of transmission characteristics.
光ファイバに被覆された樹脂はヤング率、ゲル分率，測
定等の方法によりその硬化度を定量化し、伝送特性に及
ぼす影響を調査することにより伝送特性のすぐれた光フ
ァイバが生産されてきた。Optical fibers with excellent transmission characteristics have been produced by quantifying the degree of hardening of the resin coated on optical fibers by measuring Young's modulus, gel fraction, etc., and investigating the effect on transmission characteristics.
しかしながら，近年長距離光通信への需要の高まりの中
では、伝送特性の向上に対する要求が更に高くなり、前
記手段では不十分となってきた。However, as the demand for long-distance optical communications has increased in recent years, the demand for improved transmission characteristics has become even higher, and the above-mentioned means have become insufficient.
即ち、光ファイバに被覆された樹脂の硬化度を引張り試
験により弾性率で若しくはゲル分率で評価しようとする
場合、樹脂同士の密着性が強いため分離がむづかしく複
数の樹脂層を一緒に評価せざるを得なかった。In other words, when trying to evaluate the degree of curing of a resin coated on an optical fiber using elastic modulus or gel fraction using a tensile test, it is difficult to separate multiple resin layers together due to the strong adhesion between the resins. I had to evaluate it.
又、各樹脂層を分離できたとしても、ソフト層について
は、機械物性の評価は非常に困難であった。又、ゲル分
率では微妙な硬化度の差は測定できないという問題もあ
った。Furthermore, even if each resin layer could be separated, it was very difficult to evaluate the mechanical properties of the soft layer. There is also the problem that subtle differences in the degree of curing cannot be measured based on the gel fraction.
従って、多層被覆ファイバの各層の硬化度の評価は殆ん
ど不可能であった。Therefore, it has been almost impossible to evaluate the degree of hardening of each layer of a multilayer coated fiber.
しかしながら多層被覆ファイバの各層の硬化度を評価す
ることは非常に重要である。被覆層の硬化度が光ファイ
バの伝送特性に及ぼす影響は各層によって大きく異なる
からである。However, it is very important to evaluate the degree of hardening of each layer of a multilayer coated fiber. This is because the influence of the degree of hardening of the coating layer on the transmission characteristics of the optical fiber varies greatly depending on each layer.
例えば、通常光ファイバの保護層の役割を果たす最外層
の場合、硬化不十分で硬化度が低い場合、側圧の影響を
受けやすく伝送損失が高くなることがある。一方、緩衝
層の役割を果たす最内層の場合、その硬化不十分で硬化
度が低いと低温で伝送損失が悪化することがある。For example, in the case of the outermost layer, which normally serves as a protective layer of an optical fiber, if the degree of curing is insufficient due to insufficient curing, it may be susceptible to lateral pressure and transmission loss may increase. On the other hand, in the case of the innermost layer that serves as a buffer layer, if the degree of curing is low due to insufficient curing, transmission loss may worsen at low temperatures.
本発明は多層被覆ファイバの各層の硬化度を個別に容易
に評価する方法を提供するものである。The present invention provides a method for easily evaluating the degree of hardening of each layer of a multilayer coated fiber individually.
口，発明の構成
〔課題を解決するための手段〕
本発明はガラスファイバに有機物被覆を施した光ファイ
バ被覆材の硬化度定量化方法において、前記光ファイバ
端面の被覆部に圧子を加えて硬度を測定し、該硬度を予
め求めた前記被覆材の硬度と硬化度の関係より硬化度を
求めることを特徴とする光ファイバ被覆材の硬化度定量
化方法である。SUMMARY OF THE INVENTION [Means for Solving the Problems] The present invention provides a method for quantifying the degree of hardening of an optical fiber coating material in which a glass fiber is coated with an organic substance. This is a method for quantifying the degree of hardening of an optical fiber coating material, characterized in that the hardness is determined from the relationship between the hardness of the coating material and the degree of hardening determined in advance.
第１図は本発明の一具体例であって、ｌは光ファイバ、
２は内層、３は外層、４はファイバ測定は以下に示すよ
うにして行なう。FIG. 1 shows a specific example of the present invention, where l is an optical fiber,
2 is the inner layer, 3 is the outer layer, and 4 is the fiber.Measurements are performed as shown below.
■ 先端がダイヤモンドの圧子を用いて一定の荷重で切
断面の被覆層の各層に押し込む。■ Using a diamond-tipped indenter, press into each layer of the coating layer on the cut surface with a constant force.
０ その時の圧子の押し込み深さを測定し、硬度を求め
る。0 Measure the indentation depth of the indenter at that time and determine the hardness.
ここで、試験荷重をＰ （！ｉ） ．圧子押し込み深さ
をＨ（μｒＩＬ）とすると、硬度ＤＨは次式で定義され
る。Here, the test load is P (!i). If the indenter indentation depth is H (μrIL), the hardness DH is defined by the following formula.
Ｄ Ｈ ＝ ｋ Ｐ／Ｈ” （ １／ｐｒｙ？）ｋは定
数で通常１４７とする。D H = k P/H" (1/pry?) k is a constant and is usually set to 147.
硬化度は、同一構造のファイバで十分硬化したものを基
準とし、このときの硬化度を１００％として相対値をも
って表わす。The degree of hardening is expressed as a relative value based on a sufficiently hardened fiber of the same structure, with the degree of hardening at this time being 100%.
光ファイバの横断面に圧子を加えて硬度を測定し、この
測定値から硬化度を求める方法であるから、引張り試験
の場合のように長いサンプルは必要ではなく、比較的短
いサンプル（数ｃＩＲ）でも評価することが可能である
。また、ゲル分率の測定のように抽出のために長時間を
要することもない。Since this method measures the hardness by applying an indenter to the cross section of the optical fiber and calculates the degree of hardening from this measured value, it does not require a long sample as in the case of a tensile test, but rather a relatively short sample (several cIR). However, it is possible to evaluate. In addition, it does not require a long time for extraction unlike gel fraction measurement.
〔実施例１〕
シングルモード（ ＳＭ）型プリフォームを線引し、線
径１２５μｍのガラスファイバとした後、熱硬化シリコ
ーン樹脂を線速１００、１５０および２００ＷＬ／分で
塗布、硬化させて２５０μｍ径の光ファイバを作製した
。[Example 1] A single mode (SM) type preform was drawn into a glass fiber with a wire diameter of 125 μm, and then a thermosetting silicone resin was applied and cured at a wire speed of 100, 150, and 200 WL/min to obtain a glass fiber with a diameter of 250 μm. An optical fiber was fabricated.
この光ファイバにナイロンｌ２を押出被覆し、５００μ
扉径の光ファイバとした。This optical fiber is coated with nylon l2 by extrusion and has a thickness of 500 μm.
An optical fiber with the diameter of the door was used.
シリコーン樹脂の硬度を測定したところ、それぞれ０．
１６、０１５およびｏ．１ｏｙ／μＲであった。線速１
００および１５０ｒｎ／分で線引されたものに比べ２０
０ｍ／分で線引したものが硬化不足であることが判った
。これは、線速１００ ｍ／分の硬化度１００多に対し
、１５０ｙＷ／分は９４％、２００ ｍ／分は６３多で
あった。When the hardness of the silicone resin was measured, each was found to be 0.
16, 015 and o. It was 1oy/μR. Linear speed 1
20 compared to those delineated at 00 and 150rn/min.
It was found that those drawn at 0 m/min were insufficiently cured. The degree of curing was 100 at a line speed of 100 m/min, 94% at 150 yW/min, and 63 at 200 m/min.
〔実施例２〕
ＳＭ型プリフォームを紡糸し、線径が１２５μ扉のガラ
スファイバとした後、ウレタンアクリレトからなるＵＶ
硬化ソフト樹脂を線速１００および３００ｍ／一で塗布
、硬化し、２００μｍ径の光ファイバを得た。次にこの
光ファイバにウレタンアクリレートからなるＵＶ硬化Ｉ
＼−ド樹脂を同一線速で塗布、硬化し、２５０μｍ径の
光ファイＩくを得た。ソフト樹脂の硬度を測定したとこ
ろ０，２５、０． １０ （ ｙμｄ）であった。これ
は線速５０Ｖ分（硬度０．３ ０ ｙμｍ’）の硬化度
１００％に対し、夫々８３％、３３多であり高速で線引
したもののソフト樹脂が硬化不足であることが判った。[Example 2] After spinning the SM type preform into a glass fiber with a wire diameter of 125μ, UV fiber made of urethane acrylate was
A hardened soft resin was applied and cured at linear speeds of 100 and 300 m/1 to obtain an optical fiber with a diameter of 200 μm. Next, this optical fiber was coated with UV-curable I made of urethane acrylate.
The resin was coated and cured at the same linear speed to obtain an optical fiber with a diameter of 250 μm. When the hardness of the soft resin was measured, it was 0.25, 0. 10 (yμd). This was 83% and 33%, respectively, compared to 100% at a drawing speed of 50V (hardness 0.30 yμm'), indicating that the soft resin was insufficiently cured even though it was drawn at high speed.
又、これらのファイバのハード樹脂についても同様に硬
度を測定したところ、夫々３．２、３．１Ｃｙ／ｐｒｒ
？）であった。これは線速５０〜分 （硬度３．５ｙμ
ｎ？）の硬化度１００多に対し、夫々９１％、８９予で
ありソフト樹脂と異なり線速による硬化度の差は小さい
ものであった。Furthermore, when the hardness of the hard resin of these fibers was similarly measured, they were 3.2 and 3.1 Cy/prr, respectively.
? )Met. This is a linear speed of 50 minutes (hardness 3.5 yμ
n? ), the curing degree was 91% and 89%, respectively, and unlike soft resins, the difference in curing degree depending on the linear speed was small.
〔比較例１〕
実施例１のファイバについて、シリコーン樹脂のゲル分
率を溶剤としてメチル・エチルケトンを使用して測定し
た。その結果、線速１００、１５０、２ ０ ０ｒＩＡ
＋で製作したそれぞれについて、９４多、９５多、９３
％であり、硬化度の大差は見られなかった。[Comparative Example 1] Regarding the fiber of Example 1, the gel fraction of the silicone resin was measured using methyl ethyl ketone as a solvent. As a result, linear velocity of 100, 150, 200rIA
For each made with +, 94, 95, 93
%, and no major difference in the degree of curing was observed.
〔比較例２〕
実施例２のファイバについて、ガラスファイバを引抜い
たソフト樹脂とハード樹脂の二層の平均ヤング率を測定
した。各サジプル数は１０で，線速１０ ０ ％ｚ％お
よび３００ｎ／５＋のものの平均値は２３Ｋｇ／．ｊお
よび２１ Ｋｙ／一で、実施例２のハード樹脂の硬度と
同様線速による差は小さいものであったが、各線速での
測定値の標準偏差は２．４Ｋ− および１．９Ｋｙ／ｆ
ｆ と非常にバラツキの大きいものであった。[Comparative Example 2] Regarding the fiber of Example 2, the average Young's modulus of the two layers of soft resin and hard resin from which the glass fiber was drawn was measured. The number of saji pulls for each is 10, and the average value for linear velocity 100%z% and 300n/5+ is 23Kg/. j and 21 Ky/f, and as with the hard resin of Example 2, the difference due to linear speed was small, but the standard deviation of the measured values at each linear speed was 2.4 K- and 1.9 Ky/f.
There was a very large variation in f.
ハ．発明の効果
以上説明したように本発明の硬化度定量化手法では光フ
ァイバの複数層の被覆の各層個別の硬化度（特にすぐ外
側のソフト樹脂の硬化度）を求めることが可能である。C. Effects of the Invention As explained above, the hardening degree quantification method of the present invention makes it possible to determine the hardening degree of each layer of the multi-layer coating of an optical fiber (particularly the hardening degree of the soft resin just outside).
また、そのことによってすぐれた伝送特性を有する光フ
ァイバを提供することをも可能にするものである。This also makes it possible to provide an optical fiber with excellent transmission characteristics.
また、測定の精度についても従来のヤン゛グ率ゲル分率
の手法に比べて微小な相違を測定できる。Furthermore, in terms of measurement accuracy, it is possible to measure minute differences compared to conventional Young's modulus and gel fraction methods.
被覆材の硬化度定量化方法に適用される硬度測定を説明
する図、第２図は硬化度定量化される光ファイバの構造
を示す斜視図である。FIG. 2 is a diagram illustrating hardness measurement applied to the method for quantifying the degree of hardness of a coating material, and is a perspective view showing the structure of an optical fiber whose degree of hardness is quantified.
１・・・・ガラスファイバ ２・・・・・・ノフト層
３・・・・・・ハード層 ４・・・・・・光フ
ァイバ５・・・・・・パイプ ６・・・・・
・圧子1... Glass fiber 2... Noft layer 3... Hard layer 4... Optical fiber 5... Pipe 6...
・Indenter
Claims (1)
の硬化度定量化方法において、前記光ファイバ端面の被
覆部に圧子を加えて硬度を測定し、該硬度を予め求めた
前記被覆材の硬度と硬化度の関係より硬化度を求めるこ
とを特徴とする光ファイバ被覆材の硬化度定量化方法。In a method for quantifying the degree of hardening of an optical fiber coating material in which a glass fiber is coated with an organic substance, an indenter is applied to the coating portion of the end face of the optical fiber to measure the hardness, and the hardness and hardness of the coating material are determined in advance. A method for quantifying the degree of hardening of an optical fiber coating material, characterized by determining the degree of hardening from a relationship between degrees of hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24441289A JPH0758247B2 (en) | 1989-09-19 | 1989-09-19 | Method for quantifying the degree of curing of optical fiber coating materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24441289A JPH0758247B2 (en) | 1989-09-19 | 1989-09-19 | Method for quantifying the degree of curing of optical fiber coating materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03105233A true JPH03105233A (en) | 1991-05-02 |
| JPH0758247B2 JPH0758247B2 (en) | 1995-06-21 |
Family
ID=17118281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24441289A Expired - Fee Related JPH0758247B2 (en) | 1989-09-19 | 1989-09-19 | Method for quantifying the degree of curing of optical fiber coating materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0758247B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9244007B2 (en) | 2011-06-24 | 2016-01-26 | Nippon Sheet Glass Company, Limited | Apparatus and method for measuring degree of cure of adhesive agent |
-
1989
- 1989-09-19 JP JP24441289A patent/JPH0758247B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9244007B2 (en) | 2011-06-24 | 2016-01-26 | Nippon Sheet Glass Company, Limited | Apparatus and method for measuring degree of cure of adhesive agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0758247B2 (en) | 1995-06-21 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |