JP2001166188A - Fire-retardant cable with fewer coated optical fibers - Google Patents
Fire-retardant cable with fewer coated optical fibersInfo
- Publication number
- JP2001166188A JP2001166188A JP35253599A JP35253599A JP2001166188A JP 2001166188 A JP2001166188 A JP 2001166188A JP 35253599 A JP35253599 A JP 35253599A JP 35253599 A JP35253599 A JP 35253599A JP 2001166188 A JP2001166188 A JP 2001166188A
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- JP
- Japan
- Prior art keywords
- weight
- parts
- flame
- optical fiber
- retardant
- 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.)
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Links
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、燃焼時にハロゲン
系有毒ガスや煙等を発生せず、かつ高度の難燃性を有
し、耐熱性、機械強度、柔軟性が良好で、成形加工性を
低下させることなく光屋外線、光屋内線、少心加入用ケ
ーブルなどに用いられる少心光ファイバーケーブルに関
し、口出し時の作業性を向上させた難燃性少心光ファイ
バーケーブルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a halogen-based toxic gas or smoke upon combustion, having a high degree of flame retardancy, having good heat resistance, mechanical strength and flexibility, and having good moldability. The present invention relates to a flame-retardant small-fiber optical fiber cable having improved workability at the time of tapping, which is used for an optical outdoor line, an optical indoor line, a cable for adding a small number of fibers, etc.
【０００２】[0002]
【従来の技術】従来の少心光ファイバーケーブルとして
は、図１に示すようなものが使用されている。図１中の
符号１に示されるものは直径１２５μｍの光心線であ
り、符号２は外径０．４ｍｍの単鋼線の副テンションメ
ンバである。この副テンションメンバ２と光心線１をユ
ニットシース４の押し出し成形で一括被覆され、光ファ
イバユニット５をなしており、これら単体は光屋内線
（インドアケーブル）等に使用される。この光ファイバ
ユニット５の中央には、溝６が上下に対向して設けられ
ている。この溝６はこのような少心光フィバケーブルの
接続などの際に口出し（光心線を痛めずに引き出す）を
容易に行えるように、ユニットシース４を引裂きやすく
するためのものである。符号３は外径２．６ｍｍの単鋼
線の主テンションメンバである。これにユニットシース
４を被覆したものが支持線７であり、屋外で使用される
場合には、前記述の光ファイバユニット５と支持線７と
を同時に成形し図１のような屋外用の光屋外線（架空光
ト゛ロッフ゜光フィバ）となる。2. Description of the Related Art As a conventional small-fiber optical fiber cable, a cable as shown in FIG. 1 is used. Reference numeral 1 in FIG. 1 denotes an optical fiber having a diameter of 125 μm, and reference numeral 2 denotes a sub-tension member of a single steel wire having an outer diameter of 0.4 mm. The sub-tension member 2 and the optical fiber 1 are collectively covered by extrusion molding of the unit sheath 4 to form an optical fiber unit 5, which is used alone as an indoor optical cable (indoor cable) or the like. At the center of the optical fiber unit 5, a groove 6 is provided so as to face up and down. The groove 6 is for facilitating tearing of the unit sheath 4 so as to facilitate opening (pulling out the optical fiber without damaging the optical fiber) when connecting such a low-fiber-optic fiber cable. Reference numeral 3 is a main tension member of a single steel wire having an outer diameter of 2.6 mm. The support wire 7 is coated with the unit sheath 4, and when used outdoors, the optical fiber unit 5 and the support wire 7 described above are simultaneously formed to form an outdoor light as shown in FIG. It will be an outdoor line (fictitious optical trough optical fiber).
【０００３】近年、火災時の安全性の面から、難燃電
線、難燃ケーブルのノンハロゲン化、すなわち、煙の発
生が少なく、ハロゲン化水素ガスなどの有害ガスが発生
しない電線・ケーブルの開発が進められ、最近は材料の
リサイクルを含む環境保護対策の面からも、このような
ノンハロゲン化への期待が高まっており、従来のポリ塩
化ビニルを被覆材として使用するのは好ましくなくなっ
てきた。このため、ハロゲンを含まない有機ポリマーを
ベースとしたノンハロゲン難燃性組成物の開発が盛んに
行われている。しかしながら、このような組成物を少心
光ファイバーに前述のユニットシースとして使用した場
合、難燃性が不十分であったり、被覆材料の伸びが４０
０％以上もあることから口出し性の作業性が悪いという
難点があった。In recent years, from the viewpoint of fire safety, the development of non-halogenated flame-retardant electric wires and flame-retardant cables, that is, electric wires and cables that generate less smoke and do not generate harmful gases such as hydrogen halide gas has been developed. Recently, from the viewpoint of environmental protection measures including the recycling of materials, expectations for such non-halogenation have increased, and it has become undesirable to use conventional polyvinyl chloride as a coating material. For this reason, the development of non-halogen flame-retardant compositions based on halogen-free organic polymers has been actively conducted. However, when such a composition is used as the above-mentioned unit sheath in a small-fiber optical fiber, the flame retardancy is insufficient or the elongation of the coating material is 40%.
There is a drawback that the workability of the extruding property is poor because it is 0% or more.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、有害
性の高いハロゲンを含まない被覆材で、高度な難燃性を
有したもので被覆された、口出しの際の作業性が良好で
ある難燃性少心光ケーブルを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a highly hazardous halogen-free coating material which is coated with a highly flame-retardant material and which has good workability at the time of tapping. An object of the present invention is to provide a flame-retardant low-core optical cable.
【０００５】[0005]
【課題を解決するための手段】本発明者はハロゲンを含
まない各種ポリマーと難燃剤を組み合わせ、これらを製
造し、光ファイバに被覆し難燃性と口出し性を評価した
ところ特定のポリマーと特定の難燃剤を組み合わせたも
のだけが、本発明の問題が解決されることを見い出し
た。すなわち、本発明は、光ファイバー心線を酢酸ビニ
ル（ＶＡ）含有量が５〜４５重量％のエチレン−酢酸ビ
ニル共重合体（ＥＶＡ）９９．５〜７５重量％と不飽和
カルボン酸で変性されたポリオレフィン樹脂０．５〜２
５重量％からなる樹脂成分１００重量部に対し、難燃剤
１５０〜３００重量部と、下記〜の添加剤をＨＬ
Ｂが１０以下の界面活性剤０．１〜１０重量部、 粘度が１０万ｃｓ以上のシリコン０．１〜１０重量部 高級脂肪酸を０．１〜１０重量部 少なくとも１種を含んだものを配合した難燃性組成物で
被覆してなる難燃性少心光ファイバーケーブルである。
好ましくは、前記難燃剤が脂肪酸または脂肪酸金属塩で
表面処理された水酸化マグネシウムと、表面処理されて
ない金属水酸化物とを０：１０〜４：６で混合したもの
である前記難燃性少心光ファイバーケーブルである。更
に好ましくは、前記表面処理されていない金属水酸化物
が、表面処理されていない水酸化マグネシウムである、
又は表面処理されていない水酸化マグネシウムと水酸化
アルミニウムの混合物である前記難燃性少心光ファイバ
ーケーブルである。Means for Solving the Problems The present inventors have combined various kinds of polymers containing no halogen and a flame retardant, manufactured these, coated them on an optical fiber, and evaluated the flame retardancy and tapping properties. It has been found that only the combination of the above flame retardants solves the problem of the present invention. That is, in the present invention, an optical fiber core is modified with 99.5 to 75% by weight of an ethylene-vinyl acetate copolymer (EVA) having a vinyl acetate (VA) content of 5 to 45% by weight and an unsaturated carboxylic acid. Polyolefin resin 0.5-2
For 100 parts by weight of the resin component consisting of 5% by weight, 150 to 300 parts by weight of the flame retardant and the following additives
0.1 to 10 parts by weight of a surfactant having a B of 10 or less, 0.1 to 10 parts by weight of a silicon having a viscosity of 100,000 cs or more, and 0.1 to 10 parts by weight of a higher fatty acid. A flame-retardant low-core optical fiber cable coated with the flame-retardant composition described above.
Preferably, the flame retardant is a mixture of magnesium hydroxide surface-treated with a fatty acid or a fatty acid metal salt and a metal hydroxide not surface-treated in a ratio of 0:10 to 4: 6. It is a small-fiber optical fiber cable. More preferably, the metal hydroxide that is not surface-treated is magnesium hydroxide that is not surface-treated,
Alternatively, the flame-retardant low-core optical fiber cable is a mixture of magnesium hydroxide and aluminum hydroxide that have not been surface-treated.
【０００６】[0006]
【発明の実施の形態】本発明で用いられるエチレン−酢
酸ビニル共重合体（ＥＶＡ）は、酢酸ビニル（ＶＡ）含
有量が５〜４５重量％のＥＶＡを単独で用いても、ＶＡ
含有量が高いＥＶＡとＶＡ含有量が低いＥＶＡ又はポリ
エチレン（ＰＥ）を混合することにより、ＶＡ含有量を
５〜４５重量％に調整したものを用いても良い。ＶＡ含
有量は、２５重量％〜４５重量％が好ましく、さらに好
ましくは、２５〜３１重量％である。ＥＶＡのＶＡ含有
量が、５重量％未満であると、難燃性が不十分となり、
４５重量％を超えると、極端に強度が低下する。BEST MODE FOR CARRYING OUT THE INVENTION The ethylene-vinyl acetate copolymer (EVA) used in the present invention can be used even if EVA having a vinyl acetate (VA) content of 5 to 45% by weight is used alone.
A mixture of EVA having a high content and EVA having a low VA content or polyethylene (PE) to adjust the VA content to 5 to 45% by weight may be used. The VA content is preferably 25% by weight to 45% by weight, and more preferably 25% to 31% by weight. When the VA content of EVA is less than 5% by weight, the flame retardancy becomes insufficient,
If it exceeds 45% by weight, the strength is extremely reduced.
【０００７】本発明で使用される不飽和カルボン酸変性
のポリオレフィン樹脂としては、特に規定するわけでは
ないが、不飽和カルボン酸としてはアクリル酸、メタク
リル酸、マレイン酸、フマル酸等の一塩基酸及び二塩基
酸あるいは上記の不飽和カルボン酸の金属塩、アミド、
イミド、エステルもしくは無水物等が挙げられ、最も好
ましいのは無水マレイン酸でありその変性率は０．０５
〜５重量部が適当である。変性されるポリオレフン樹脂
についても特に規定しないが強度、耐熱の面からＬＬＤ
ＰＥ、ＰＰ等が好ましい。ＥＶＡと不飽和のカルボン酸
変性のポリオレフィン樹脂の比率は９９．５：０．５〜
７５：２５の範囲が好ましく、この範囲からはずれると
柔軟性が損なわれまた難燃性も低下し好ましくない。The unsaturated carboxylic acid-modified polyolefin resin used in the present invention is not particularly limited, but the unsaturated carboxylic acid may be a monobasic acid such as acrylic acid, methacrylic acid, maleic acid or fumaric acid. And dibasic acids or metal salts of the above unsaturated carboxylic acids, amides,
Examples thereof include imide, ester and anhydride, and most preferred is maleic anhydride, the modification rate of which is 0.05.
~ 5 parts by weight is suitable. The polyolefin resin to be modified is not particularly specified, but LLD is used in view of strength and heat resistance.
PE, PP, etc. are preferred. The ratio of EVA to the unsaturated carboxylic acid-modified polyolefin resin is 99.5: 0.5 to
A ratio of 75:25 is preferable. If the ratio is out of this range, the flexibility is impaired and the flame retardancy is lowered, which is not preferable.
【０００８】本発明で利用される水酸化マグネシウムの
表面処理剤としては、脂肪酸または脂肪酸金属塩が用い
られ好ましくはオレイン酸等で処理されたものである。
また、表面処理されていない金属水酸化物としては、表
面処理されていない水酸化マグネシウム、又は表面処理
されていない水酸化マグネシウムと水酸化アルミニウム
の混合物であることが好ましい。表面処理されていない
水酸化アルミニウムの表面処理されていない金属水酸化
物全量に対する混合比は、１／２以下が好ましく、さら
に好ましくは、１／３以下が好ましい。水酸化アルミニ
ウムの表面処理されていない金属水酸化物全量に対する
混合比が１／２を上回ると、混練時の温度上昇による発
泡により、成形外観が悪化する。脂肪酸又は脂肪酸金属
塩で処理された水酸化マグネシウム、表面処理されてい
ない金属水酸化物の平均粒径としては５μｍ以下が好ま
しく、さらに好ましくは、２μｍ以下が好ましい。平均
粒径が５μｍを上回ると、最終的な難燃性組成物の難燃
性が不十分となるばかりでなく、べたつき性がひどくな
り、成形外観が悪くなる。脂肪酸又は脂肪酸金属塩で処
理された水酸化マグネシウムと表面処理されていない金
属水酸化物の混合比は、０：１０〜４：６であることが
好ましく、さらに好ましくは、２：８である。ここで、
脂肪酸又は脂肪酸金属塩で処理された水酸化マグネシウ
ムと表面処理されていない金属水酸化物の混合比が４：
６より大きくなると引張伸びが高くな口出し作業性が極
端に低下する。上記の混合比で混合した脂肪酸又は脂肪
酸金属塩で処理された水酸化マグネシウムと表面処理さ
れていない金属水酸化物の酢酸ビニル（ＶＡ）含有量が
５〜４５重量％のエチレン−酢酸ビニル共重合体（ＥＶ
Ａ）９９．５〜７５重量％と不飽和カルボン酸で変性さ
れたポリオレフィン樹脂を０．５〜２５重量％からなる
樹脂成分１００重量部に対する配合量は、１５０〜３０
０重量部が好ましく、さらに好ましくは１７０〜２００
重量部である。１５０重量部を下回ると、難燃性が不十
分となり、３００重量部部を上回ると押し出しトルクが
上昇し、成形加工性が悪化する。As the surface treatment agent for magnesium hydroxide used in the present invention, a fatty acid or a metal salt of a fatty acid is used, preferably one treated with oleic acid or the like.
The metal hydroxide that has not been surface-treated is preferably magnesium hydroxide that has not been surface-treated, or a mixture of magnesium hydroxide that has not been surface-treated and aluminum hydroxide. The mixing ratio of the untreated aluminum hydroxide to the total amount of the untreated metal hydroxide is preferably 1/2 or less, more preferably 1/3 or less. If the mixing ratio of the aluminum hydroxide to the total amount of the metal hydroxide not subjected to the surface treatment is more than 成形, the molding appearance is deteriorated due to foaming due to a rise in temperature during kneading. The average particle size of the magnesium hydroxide treated with the fatty acid or the fatty acid metal salt and the metal hydroxide not treated with the surface is preferably 5 μm or less, more preferably 2 μm or less. When the average particle size exceeds 5 μm, not only the flame retardancy of the final flame-retardant composition becomes insufficient, but also the stickiness becomes severe and the appearance of the molded product becomes poor. The mixing ratio between the magnesium hydroxide treated with the fatty acid or the fatty acid metal salt and the metal hydroxide not subjected to the surface treatment is preferably from 0:10 to 4: 6, more preferably 2: 8. here,
The mixing ratio of the magnesium hydroxide treated with the fatty acid or the fatty acid metal salt to the metal hydroxide not treated with the surface is 4:
When it is larger than 6, the workability of tapping with high tensile elongation is extremely reduced. An ethylene-vinyl acetate copolymer having a magnesium acetate treated with a fatty acid or a metal salt of a fatty acid mixed at the above mixing ratio and a metal hydroxide not surface-treated with a vinyl acetate (VA) content of 5 to 45% by weight. Merging (EV
A) The blending amount of polyolefin resin modified with 99.5 to 75% by weight and unsaturated carboxylic acid to 100 parts by weight of a resin component consisting of 0.5 to 25% by weight is 150 to 30%.
0 parts by weight is preferred, and more preferably 170 to 200 parts by weight.
Parts by weight. If the amount is less than 150 parts by weight, the flame retardancy becomes insufficient. If the amount is more than 300 parts by weight, the extrusion torque increases, and the moldability deteriorates.
【０００９】本発明で用いられるＨＬＢが１０以下の非
イオン系界面活性剤は、主に、押し出しトルクを下げ成
形加工を向上とさせるとともに、外観を向上させるため
に、添加するもので特に制限されるものではないが、以
下のものが挙げられる。例えば、グリセリン脂肪酸エス
テル、ソルビタン脂肪酸エステル、ソルビット脂肪酸エ
ステル、ペンタエリスリトール脂肪酸エステル、エチレ
ングリコール脂肪酸エステル、プロピレングリコール脂
肪酸エステル、ポリグリセリン、ショ糖の高次脂肪酸エ
ステル、ポリエチレングリコールの高級アルコール又は
高級脂肪酸の付加体（ポリエチレングリコール鎖が短い
もの）、アルキルグルコシド、アルキルマルトシド等が
ある。さらにシリコーン系のＨＬＢが１０以下である非
イオン系界面活性剤としては、特に制限されるものでは
なく、例えば、ポリエーテル変性ジメチルポリシロキサ
ン類、ポリエーテル変性メチルフェニルポリシロキサン
類、ポリエーテル変性メチルハイドロジェンポリシロキ
サン類、ジメチルポリシロキサンポリアルキレングリコ
ール共重合体類、メチルフェニルポリシロキサンポリア
ルキレングリコール共重合体類、メチルハイドロジェン
ポリシロキサンポリアルキレングリコール共重合体類等
が挙げられる。本発明ではこれら非イオン系界面活性剤
の中から１種または２種以上を用いることができる。The nonionic surfactants having an HLB of 10 or less used in the present invention are mainly added for the purpose of lowering the extrusion torque, improving the molding process, and improving the appearance, and are particularly limited. Although not limited, the following may be mentioned. For example, glycerin fatty acid ester, sorbitan fatty acid ester, sorbite fatty acid ester, pentaerythritol fatty acid ester, ethylene glycol fatty acid ester, propylene glycol fatty acid ester, polyglycerin, higher fatty acid ester of sucrose, addition of higher alcohol or higher fatty acid of polyethylene glycol (A polyethylene glycol chain is short), alkyl glucoside, alkyl maltoside and the like. The nonionic surfactant having a silicone-based HLB of 10 or less is not particularly limited, and examples thereof include polyether-modified dimethylpolysiloxanes, polyether-modified methylphenylpolysiloxanes, and polyether-modified methyl. Examples include hydrogen polysiloxanes, dimethyl polysiloxane polyalkylene glycol copolymers, methylphenyl polysiloxane polyalkylene glycol copolymers, and methyl hydrogen polysiloxane polyalkylene glycol copolymers. In the present invention, one or more of these nonionic surfactants can be used.
【００１０】ここで用いられるＨＬＢ値は、以下のよう
にして算出された値で、 ＨＬＢ＝２０×Ｍｎ／Ｍ Ｍ：界面活性剤の分子量 Ｍｎ：親水基部分の分子量 ＨＬＢが１０以下、好ましくは７以下、さらに好ましく
は５以下、最も好ましくは３以下の界面活性剤が有効に
働き、添加量も少なくて済む。この系においてＨＬＢが
１０を超えると、金属水酸化物を十分に分散できない。
親水性のポリオキシエチレン鎖等はできるだけ短くする
か、又は、含まない方が好ましい。長いポリオキシエチ
レン鎖があるとＨＬＢが大きくなるため、金属水酸化物
を分散する能力がなくなる。The HLB value used here is a value calculated as follows: HLB = 20 × Mn / MM M: molecular weight of surfactant Mn: molecular weight of hydrophilic group portion HLB is 10 or less, preferably A surfactant of 7 or less, more preferably 5 or less, and most preferably 3 or less works effectively, and the addition amount is small. If the HLB exceeds 10 in this system, the metal hydroxide cannot be sufficiently dispersed.
It is preferable that the hydrophilic polyoxyethylene chain and the like be as short as possible or not to include. Long polyoxyethylene chains increase the HLB, thereby eliminating the ability to disperse metal hydroxides.
【００１１】界面活性剤としては、グリセリン脂肪酸エ
ステル、ソルビタン脂肪酸エステル、糖類などの脂肪酸
エステル等が好ましく、さらに好ましくは、グリセリ
ン、ソルビタン、糖類等の高次脂肪酸エステルであり、
最も好ましくは、グリセロールモノステアレート、トリ
オレイン酸ソルビタン、トリステアリン酸ソルビタンで
ある。界面活性剤の添加量は、樹脂成分１００重量部に
対し０．１重量部から１０重量部であり、好ましくは
０．３重量部から５重量部であり、さらに好ましくは
０．５重量部から１重量部である。界面活性剤の添加量
が、金属水酸化物１００重量部に対し０．１重量部未満
では、界面活性剤の効果が十分に発現せず、成形加工
性、破断伸びが十分向上しない。また、１０重量部を超
えると、成形後、界面活性剤がブリードしたり、難燃性
が低下するなどの不具合を生ずる。The surfactant is preferably a fatty acid ester such as glycerin fatty acid ester, sorbitan fatty acid ester or saccharide, and more preferably a higher fatty acid ester such as glycerin, sorbitan or saccharide.
Most preferred are glycerol monostearate, sorbitan trioleate, and sorbitan tristearate. The surfactant is added in an amount of 0.1 to 10 parts by weight, preferably 0.3 to 5 parts by weight, more preferably 0.5 to 5 parts by weight, per 100 parts by weight of the resin component. 1 part by weight. If the amount of the surfactant is less than 0.1 part by weight with respect to 100 parts by weight of the metal hydroxide, the effect of the surfactant is not sufficiently exhibited, and the moldability and elongation at break are not sufficiently improved. On the other hand, if it exceeds 10 parts by weight, problems such as bleeding of the surfactant after molding and deterioration of flame retardancy occur.
【００１２】本発明に使用されるシリコンオイルの種類
については、特に規定しないがジメチルシリコーンオイ
ルが成形加工面で良好であり、粘度はブリードの面から
１０万ＣＳ〜５０万ＣＳが好ましい。１０万ＣＳ未満だ
と経時的な変化で表面にブリードし好ましくなく５０万
ＣＳを越えると粘度が急激に作業性が悪化し好ましくな
い。添加量については、０．１〜１０重量部であり、
０．１重量部未満では効果がなく１０重量部よりも多い
と経時的な変化でブリード等が発生し好ましくない。[0012] The type of silicone oil used in the present invention is not particularly limited, but dimethyl silicone oil is good on the molding surface, and the viscosity is preferably 100,000 CS to 500,000 CS from the bleed surface. If it is less than 100,000 CS, it bleeds to the surface due to a change over time. About the addition amount, 0.1 to 10 parts by weight,
If the amount is less than 0.1 part by weight, there is no effect. If the amount is more than 10 parts by weight, bleeding or the like occurs due to a change over time, which is not preferable.
【００１３】本発明に使用される高級脂肪酸としては、
高級脂肪酸金属塩が加工性改良の面で好ましく、例えば
ステアリン酸カルシュウムなどがある。これらの添加量
については０．１〜１０重量部が好ましい。０．１重量
部未満では効果なく１０重量部を超えると経時的な変化
でブルーム等は発生し好ましくない。The higher fatty acids used in the present invention include:
Higher fatty acid metal salts are preferred from the viewpoint of improving processability, such as calcium stearate. The amount of these additives is preferably 0.1 to 10 parts by weight. If the amount is less than 0.1 part by weight, there is no effect. If the amount exceeds 10 parts by weight, bloom or the like is generated due to a change over time, which is not preferable.
【００１４】なお、本発明の組成物には、必要に応じ
て、本発明の効果を阻害しない範囲で、着色剤、酸化防
止剤、紫外線吸収剤、加工助剤、安定剤その他の添加剤
を配合することができる。本発明の難燃性組成物は、以
上の各成分をバンバリーミキサー、加圧ニーダー、等の
通常のバッチ式混練機を用いて均一に混合することによ
り、容易に製造することができる。これらからできる難
燃性少心光ファイバーケーブルは単軸押し出し機等を使
用し被覆して製造できる。本発明の難燃性少心光ファイ
バーケーブルは難燃性、口出し作業性が良いことから光
屋外線、光屋内線、少心加入用ケーブル等に使用に適し
ている。The composition of the present invention may contain, if necessary, a coloring agent, an antioxidant, an ultraviolet absorber, a processing aid, a stabilizer and other additives within a range not to impair the effects of the present invention. Can be blended. The flame-retardant composition of the present invention can be easily produced by uniformly mixing the above-mentioned components using a general batch-type kneader such as a Banbury mixer or a pressure kneader. A flame-retardant small-fiber optical fiber cable made from these can be produced by coating using a single-screw extruder or the like. The flame-retardant small-fiber optical fiber cable of the present invention is suitable for use as an optical outdoor line, an optical indoor line, a cable for adding a small number of fibers, etc., because of its excellent flame retardancy and workability in tapping.
【００１５】[0015]
【実施例】以下、実施例により、本発明を説明するが、
これは単なる例示であり、本発明はこれに限定されるも
のではない。各種評価については、下記に基づいて実施
した。 シートの評価方法： （１）引張特性：厚さ１ｍｍのプレスシートからＪＩＳ
ダンベル３号試験片を作製し、引張試験機により２００
ｍｍ／ｍｉｎの速度で引張試験を行った。 （２）酸素指数：ＪＩＳ Ｋ７２０１準拠 少心光ファイバーケーブルの評価方法： （３）口出し性：図１の少心光ファイバーケーブルで図
１の溝６の切れ目から切り裂き、切り裂き時に樹脂のネ
ッキング伸びによる糸引き等がなくスムーズに光心線の
口出し性を確認する。 （４）燃焼試験：図１の構造の少心光ファイバーケーブ
ルをＪＩＳＣ３００５定める６０度傾斜燃焼試験を行
い、６０秒以内に消火したものを合格とする。Hereinafter, the present invention will be described with reference to examples.
This is merely an example, and the present invention is not limited to this. Various evaluations were performed based on the following. Sheet evaluation method: (1) Tensile properties: JIS from a 1 mm thick pressed sheet
A dumbbell No. 3 test piece was prepared, and 200
A tensile test was performed at a speed of mm / min. (2) Oxygen index: JIS K7201 compliant Evaluation method of small-fiber optical fiber cable: (3) Latchability: Cut with a small-fiber optical fiber cable of FIG. 1 from the cut of groove 6 in FIG. Confirm the smoothness of the optical fiber without any other factors. (4) Combustion test: A small-fiber optical fiber cable having the structure shown in FIG. 1 is subjected to a 60-degree inclined combustion test specified in JISC3005.
【００１６】《実施例１》酢酸ビニル（ＶＡ）含有量が
２５重量％のエチレン−酢酸ビニル共重合体（三井テ゛ュホ
゜ンホ゜リケミカル製、商品名ＥＶＡＦＬＥＸ、Ｐ２５０５）９
０重量部、無水マレイン酸で変性されたホ゜リオレフィン樹脂
（ＪＰＯ(株)製、商品名アドテックス、Ｌ−６１０１
Ｍ）１０重量部、表面処理されていない水酸化マグネシ
ウム（協和化学(株)製、商品名キスマ５）１４０重量
部、表面処理されていない水酸化アルミニウム（アルコ
ア化成(株)製、商品名Ｂ−３０３）６０重量部、シリコンオイ
ル（東レ・ダウコーニング製、商品名ＳＨ２００、粘
度：３０万ｃｓ）２重量部、ク゛リセリンモノステアレート（日本油脂
(株)製、商品名エレガンＮ１１００）１重量部を加圧ニ
ーダで１６５℃で５分混練し、オープンロールでシート
状にしたものを、シートペレタイザーで粉砕し、単軸押
し出し機でシー状に押し出したものを、１８０℃、５分
加圧成形し、所定の厚みに調整した。評価結果、引っ張
り強度１１Ｍｐａ、伸び２００％、酸素指数４５であっ
た。次に図１に示すようにな構造で幅４．５ｍｍ、高さ
２ｍｍの光心線とテンションメンバを単軸押し出し機に
て前述組成物で１６０度の成形温度で被覆し少心光ファ
イバーケーブルを製造した。評価結果、口出し性良好
で、燃焼試験も合格であった。Example 1 Ethylene-vinyl acetate copolymer having a vinyl acetate (VA) content of 25% by weight (trade name EVAFLEX, P2505, manufactured by Mitsui DuPont Chemicals) 9
0 parts by weight of polyolefin resin modified with maleic anhydride (manufactured by JPO Corporation, trade name: Adtex, L-6101)
M) 10 parts by weight, 140 parts by weight of magnesium hydroxide without surface treatment (trade name: Kisuma 5 manufactured by Kyowa Chemical Co., Ltd.), aluminum hydroxide without surface treatment (trade name: B manufactured by Alcoa Chemical Co., Ltd.) -303) 60 parts by weight, silicone oil (manufactured by Dow Corning Toray, trade name SH200, viscosity: 300,000 cs), 2 parts by weight, glycerin monostearate (Nippon Oil & Fats)
(Elegan N1100, trade name) 1 part by weight is kneaded with a pressure kneader at 165 ° C. for 5 minutes, formed into a sheet by an open roll, pulverized by a sheet pelletizer, and formed into a sheet by a single screw extruder. The extruded product was pressed at 180 ° C. for 5 minutes and adjusted to a predetermined thickness. As a result of the evaluation, the tensile strength was 11 Mpa, the elongation was 200%, and the oxygen index was 45. Next, an optical fiber cable having a width of 4.5 mm and a height of 2 mm and a tension member having a structure as shown in FIG. Manufactured. As a result of the evaluation, the extrudability was good and the combustion test was also passed.
【００１７】《実施例２》酢酸ビニル（ＶＡ）含有量が
４０重量％のエチレン−酢酸ビニル共重合体（三井テ゛ュホ
゜ンホ゜リケミカル製、商品名ＥＶＡＦＬＥＸ、Ｐ２５０５）９
０重量部、無水マレイン酸で変性されたホ゜リオレフィン樹脂
（ＪＰＯ(株)製、商品名アドテックス、Ｌ−６１０１
Ｍ）１０重量部、表面処理されていない水酸化マグネシ
ウム（協和化学(株)製、商品名キスマ５）１４０重量
部、表面処理されていない水酸化アルミニウム（アルコ
ア化成(株)製、商品名Ｂ−３０３Ｃ）６０重量部、シリコン
オイル（東レ・ダウコーニング製、商品名ＳＨ２００、粘
度：３０万ｃｓ）２重量部、ク゛リセリンモノステアレート（日本油脂
(株)製、商品名エレガンＮ１１００）１重量部を加圧ニ
ーダで１６５℃で５分混練し、オープンロールでシート
状にしたものを、シートペレタイザーで粉砕し、単軸押
し出し機でシー状に押し出したものを、１８０℃、５分
加圧成形し、所定の厚みに調整した。評価結果、引っ張
り強度８Ｍｐａ、伸び２００％、酸素指数５０であっ
た。次に実施例１と同じ様に少心光ファイバーケーブル
を作成し評価したところ、口出し性良好で、燃焼試験も
合格であった。<< Example 2 >> An ethylene-vinyl acetate copolymer having a vinyl acetate (VA) content of 40% by weight (trade name: EVAFLEX, P2505, manufactured by Mitsui DuPont Polychemicals) 9
0 parts by weight of polyolefin resin modified with maleic anhydride (manufactured by JPO Corporation, trade name: Adtex, L-6101)
M) 10 parts by weight, 140 parts by weight of magnesium hydroxide without surface treatment (trade name: Kisuma 5 manufactured by Kyowa Chemical Co., Ltd.), aluminum hydroxide without surface treatment (trade name: B manufactured by Alcoa Chemical Co., Ltd.) -303C) 60 parts by weight, 2 parts by weight of silicone oil (manufactured by Dow Corning Toray, trade name SH200, viscosity: 300,000 cs), glycerin monostearate (Nippon Oil & Fats)
(Elegan N1100, trade name) 1 part by weight is kneaded with a pressure kneader at 165 ° C. for 5 minutes, formed into a sheet by an open roll, pulverized by a sheet pelletizer, and formed into a sheet by a single screw extruder. The extruded product was pressed at 180 ° C. for 5 minutes and adjusted to a predetermined thickness. As a result of the evaluation, the tensile strength was 8 Mpa, the elongation was 200%, and the oxygen index was 50. Next, a small-fiber optical fiber cable was prepared and evaluated in the same manner as in Example 1. As a result, the leadability was good and the combustion test passed.
【００１８】《実施例３》酢酸ビニル（ＶＡ）含有量が
２５重量％のエチレン−酢酸ビニル共重合体（三井テ゛ュホ
゜ンホ゜リケミカル製，商品名ＥＶＡＦＬＥＸ Ｐ２５０５）９
０重量部、無水マレイン酸で変性されたホ゜リオレフィン樹脂
（ＪＰＯ(株)製、商品名アドテックス、Ｌ−６１０１
Ｍ）１０重量部、表面処理されていない水酸化マグネシ
ウム（協和化学(株)製、商品名キスマ５）１８０重量
部、表面処理されている水酸化マグネシウム（協和化学
(株)製、商品名キスマ５Ｂ）２０重量部、シリコンオイル（東
レ・ダウコーニング製、商品名ＳＨ２００、粘度：３０
万ｃｓ）２重量部、ク゛リセリンモノステアレート（日本油脂(株)製、
商品名エレガンＮ１１００）１重量部を加圧ニーダで１
６５℃で５分混練し、オープンロールでシート状にした
ものを、シートペレタイザーで粉砕し、単軸押し出し機
でシー状に押し出したものを、１８０℃、５分加圧成形
し、所定の厚みに調整した。評価結果、引っ張り強度６
Ｍｐａ、伸び２５０％、酸素指数５０であった。次に実
施例１と同じ様に少心光ファイバーケーブルを作成し評
価したところ、口出し性良好で、燃焼試験も合格であっ
た。Example 3 Ethylene-vinyl acetate copolymer having a vinyl acetate (VA) content of 25% by weight (EVAFLEX P2505, manufactured by Mitsui Tufon Polychemicals) 9
0 parts by weight of polyolefin resin modified with maleic anhydride (manufactured by JPO Corporation, trade name: Adtex, L-6101)
M) 10 parts by weight, surface-treated magnesium hydroxide (Kyowa Chemical Co., Ltd., trade name Kisuma 5) 180 parts by weight, surface-treated magnesium hydroxide (Kyowa Chemical Co., Ltd.)
20 parts by weight, manufactured by Dow Corning Toray Co., Ltd., trade name: SH200, viscosity: 30
10,000 cs) 2 parts by weight, glycerin monostearate (manufactured by NOF CORPORATION,
1 part by weight of Elegan N1100 (trade name)
The mixture was kneaded at 65 ° C for 5 minutes, formed into a sheet with an open roll, pulverized with a sheet pelletizer, extruded in a sea-shape with a single screw extruder, pressed at 180 ° C for 5 minutes, and formed into a predetermined thickness Was adjusted. Evaluation result, tensile strength 6
Mpa, elongation 250%, oxygen index 50. Next, a small-fiber optical fiber cable was prepared and evaluated in the same manner as in Example 1. As a result, the leadability was good and the combustion test passed.
【００１９】《比較例１》実施例１においてエチレン−
酢酸ビニル共重合体を使用せず、無水マレイン酸で変性
されたＬＬＤＰＥを１００重量部に代えた以外は、実施
例１と同様な操作を行ったところ難燃性が不合格となっ
た。 《比較例２》実施例１においてエチレン−酢酸ビニル共
重合体の酢酸ビニル（ＶＡ）含有量を４５重量％に代え
た以外は実施例１と同様な操作を行ったところ、機械的
強度が低下し、加工性も悪くなった。 《比較例３》実施例１において表面処理されていない水
酸化マグネシウムの量を６０重量部に代えた以外は実施
例１と同様な操作を行ったところ難燃性が不合格となっ
た。 《比較例４》実施例１において表面処理されていない水
酸化マグネシウムの量を２８０重量部に代えた以外は実
施例１と同様な操作を行ったところ、機械的強度が低下
し、加工性も悪くなった。 《比較例５》実施例３において表面処理されていない水
酸化マグネシウムの量を１００重量部、表面処理されて
いる水酸化マグネシウムの量を１００重量部に代えた以
外は実施例３と同様な操作を行ったところ、口出し性が
悪くなった。 《比較例６》実施例１においてシリコンオイルとク゛リセリンモノステアレー
トの量を０重量部に代えた以外は実施例１と同様な操作
を行ったところ、少心光ファイバーケーブルの製造時に
加工性が悪くケーブルの製造が出来なかった。<< Comparative Example 1 >>
When the same operation as in Example 1 was performed except that the vinyl acetate copolymer was not used and the LLDPE modified with maleic anhydride was changed to 100 parts by weight, the flame retardancy was rejected. << Comparative Example 2 >> The same operation as in Example 1 was carried out except that the vinyl acetate (VA) content of the ethylene-vinyl acetate copolymer was changed to 45% by weight, the mechanical strength was lowered. And the workability also worsened. << Comparative Example 3 >> The same operation as in Example 1 was carried out except that the amount of magnesium hydroxide not subjected to surface treatment was changed to 60 parts by weight, the flame retardancy was rejected. << Comparative Example 4 >> The same operation as in Example 1 was carried out except that the amount of untreated surface-treated magnesium hydroxide was changed to 280 parts by weight, the mechanical strength was lowered and the workability was also reduced. It got worse. << Comparative Example 5 >> The same operation as in Example 3 except that the amount of magnesium hydroxide not subjected to surface treatment was changed to 100 parts by weight and the amount of magnesium hydroxide subjected to surface treatment was changed to 100 parts by weight in Example 3. When the test was performed, the excretion property became poor. << Comparative Example 6 >> The same operation as in Example 1 was carried out except that the amounts of the silicone oil and glycerin monostearate were changed to 0 parts by weight, the workability was poor at the time of manufacturing the small-fiber optical fiber cable. The cable could not be manufactured.
【００２０】[0020]
【発明の効果】本発明の樹脂組成物を少心光ファイバー
ケーブルの被覆材として使用すると、火災等の燃焼時に
もハロゲンを含む有毒なガスも発生せず、高度な難燃性
を保持し、機械的強度、柔軟性、口出し性に優れたもの
となる。これらの少心光ファイバーケーブルは、電柱か
ら各家庭まで張られる光屋外線、各家内に配線される屋
内線等の広範囲の分野に好適に利用される。When the resin composition of the present invention is used as a covering material for a small-fiber optical fiber cable, no toxic gas containing halogen is generated even during combustion such as a fire, and high flame retardancy is maintained. It has excellent target strength, flexibility, and extrudability. These small-fiber optical fiber cables are suitably used in a wide range of fields such as an outdoor optical line extending from a telephone pole to each home and an indoor line wired in each home.
【図１】本発明の少心光ファイバーケーブルの断面概略
図FIG. 1 is a schematic sectional view of a small-fiber optical fiber cable according to the present invention.
１：光心線 ２：副テンションメンバ ３：主テンションメンバ ４：ユニットシース ５：光ファイバユニット ６：溝 ７：支持線 1: Optical fiber 2: Secondary tension member 3: Main tension member 4: Unit sheath 5: Optical fiber unit 6: Groove 7: Support wire
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｌ 83/04 Ｃ０８Ｌ 83/04 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08L 83/04 C08L 83/04
Claims (4)
含有量が５〜４５重量％のエチレン−酢酸ビニル共重合
体（ＥＶＡ）９９．５〜７５重量％と不飽和カルボン酸
で変性されたポリオレフィン樹脂０．５〜２５重量％か
らなる樹脂成分１００重量部に対し、難燃剤１５０〜３
００重量部と、下記〜の添加剤を ＨＬＢが１０以下の界面活性剤０．１〜１０重量部、 粘度が１０万ｃｓ以上のシリコン０．１〜１０重量部 高級脂肪酸を０．１〜１０重量部 少なくとも１種を含んだものを配合した難燃性組成物で
被覆してなることを特徴とする難燃性少心光ファイバー
ケーブル。1. An optical fiber core is made of vinyl acetate (VA).
100% by weight of a resin component comprising 99.5 to 75% by weight of ethylene-vinyl acetate copolymer (EVA) having a content of 5 to 45% by weight and 0.5 to 25% by weight of a polyolefin resin modified with an unsaturated carboxylic acid Parts, flame retardant 150-3
0.1 parts by weight of a surfactant having an HLB of 10 or less, 0.1 to 10 parts by weight of a silicone having a viscosity of 100,000 cs or more, and 0.1 to 10 parts by weight of a higher fatty acid. A flame-retardant small-core optical fiber cable, which is coated with a flame-retardant composition containing at least one kind by weight.
面処理された水酸化マグネシウムと、表面処理されてな
い金属水酸化物とを０：１０〜４：６で混合したもので
ある請求項１記載の難燃性少心光ファイバーケーブル。2. The flame retardant is a mixture of magnesium hydroxide surface-treated with a fatty acid or a fatty acid metal salt and a metal hydroxide not surface-treated in a ratio of 0:10 to 4: 6. The flame-retardant low-core optical fiber cable described.
表面処理されていない水酸化マグネシウムである請求項
２記載の難燃性少心用光ファイバーケーブル。3. The metal hydroxide that has not been surface-treated is
The flame-retardant small-fiber optical fiber cable according to claim 2, which is magnesium hydroxide that has not been surface-treated.
表面処理されていない水酸化マグネシウムと水酸化アル
ミニウムの混合物である請求項２記載の難燃性少心光フ
ァイバーケーブル。4. The metal hydroxide which is not surface-treated,
3. The flame-retardant low-core optical fiber cable according to claim 2, which is a mixture of magnesium hydroxide and aluminum hydroxide that have not been surface-treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35253599A JP3714593B2 (en) | 1999-12-13 | 1999-12-13 | Flame retardant fiber optic cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35253599A JP3714593B2 (en) | 1999-12-13 | 1999-12-13 | Flame retardant fiber optic cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001166188A true JP2001166188A (en) | 2001-06-22 |
| JP3714593B2 JP3714593B2 (en) | 2005-11-09 |
Family
ID=18424736
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35253599A Expired - Fee Related JP3714593B2 (en) | 1999-12-13 | 1999-12-13 | Flame retardant fiber optic cable |
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| Country | Link |
|---|---|
| JP (1) | JP3714593B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007217614A (en) * | 2006-02-17 | 2007-08-30 | Furukawa Electric Co Ltd:The | Flame-retardant resin composition and molded form using the same |
| JP2009020345A (en) * | 2007-07-12 | 2009-01-29 | Okano Electric Wire Co Ltd | Optical fiber ribbon |
| US7813606B2 (en) | 2007-01-24 | 2010-10-12 | The Furukawa Electric Co., Ltd. | Optical fiber cable |
| WO2014155879A1 (en) * | 2013-03-26 | 2014-10-02 | 古河電気工業株式会社 | Flame-retardant resin composition and optical cable provided with said resin composition |
| US8903212B2 (en) | 2008-05-28 | 2014-12-02 | Adc Telecommunications, Inc. | Fiber optic cable |
| US9316802B2 (en) | 2012-08-24 | 2016-04-19 | Commscope Technologies Llc | Optical fiber cable having reinforcing layer of tape heat-bonded to jacket |
| US9739966B2 (en) | 2011-02-14 | 2017-08-22 | Commscope Technologies Llc | Fiber optic cable with electrical conductors |
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1999
- 1999-12-13 JP JP35253599A patent/JP3714593B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007217614A (en) * | 2006-02-17 | 2007-08-30 | Furukawa Electric Co Ltd:The | Flame-retardant resin composition and molded form using the same |
| US7813606B2 (en) | 2007-01-24 | 2010-10-12 | The Furukawa Electric Co., Ltd. | Optical fiber cable |
| US8412011B2 (en) | 2007-01-24 | 2013-04-02 | The Furukawa Electric Co., Ltd. | Optical fiber cable |
| JP2009020345A (en) * | 2007-07-12 | 2009-01-29 | Okano Electric Wire Co Ltd | Optical fiber ribbon |
| US8903212B2 (en) | 2008-05-28 | 2014-12-02 | Adc Telecommunications, Inc. | Fiber optic cable |
| US9335503B2 (en) | 2008-05-28 | 2016-05-10 | Commscope Technologies Llc | Fiber optic cable |
| US10816744B2 (en) | 2008-05-28 | 2020-10-27 | Commscope Technologies Llc | Fiber optic cable |
| US11409065B2 (en) | 2008-05-28 | 2022-08-09 | Commscope Technologies Llc | Fiber optic cable |
| US9739966B2 (en) | 2011-02-14 | 2017-08-22 | Commscope Technologies Llc | Fiber optic cable with electrical conductors |
| US9316802B2 (en) | 2012-08-24 | 2016-04-19 | Commscope Technologies Llc | Optical fiber cable having reinforcing layer of tape heat-bonded to jacket |
| WO2014155879A1 (en) * | 2013-03-26 | 2014-10-02 | 古河電気工業株式会社 | Flame-retardant resin composition and optical cable provided with said resin composition |
| JP2014189562A (en) * | 2013-03-26 | 2014-10-06 | Furukawa Electric Co Ltd:The | Flame-retardant resin composition and optical cable including resin composition |
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| Publication number | Publication date |
|---|---|
| JP3714593B2 (en) | 2005-11-09 |
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