JP2010250011A - Aerial optical drop cable - Google Patents
Aerial optical drop cable Download PDFInfo
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- JP2010250011A JP2010250011A JP2009098247A JP2009098247A JP2010250011A JP 2010250011 A JP2010250011 A JP 2010250011A JP 2009098247 A JP2009098247 A JP 2009098247A JP 2009098247 A JP2009098247 A JP 2009098247A JP 2010250011 A JP2010250011 A JP 2010250011A
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- 239000003063 flame retardant Substances 0.000 claims description 17
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- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
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- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- LTURHSAEWJPFAA-UHFFFAOYSA-N sulfuric acid;1,3,5-triazine-2,4,6-triamine Chemical compound OS(O)(=O)=O.NC1=NC(N)=NC(N)=N1 LTURHSAEWJPFAA-UHFFFAOYSA-N 0.000 description 1
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Abstract
【課題】機械的強度が高く、動摩擦係数が低い架空光ドロップケーブルを提供する。
【解決手段】高密度ポリエチレン６０〜９０質量部、エラストマ４０〜１０質量部からなるベースポリマ１００質量部に対して、脂肪酸アミド０．１〜３質量部含む樹脂組成物で被覆した架空光ドロップケーブルである。
【選択図】なしAn aerial optical drop cable having high mechanical strength and a low coefficient of dynamic friction is provided.
An aerial optical drop cable coated with a resin composition containing 0.1 to 3 parts by weight of a fatty acid amide with respect to 100 parts by weight of a base polymer comprising 60 to 90 parts by weight of high-density polyethylene and 40 to 10 parts by weight of an elastomer. It is.
[Selection figure] None
Description
本発明は、屋外で使用される、架空線から需用場所の取付点に引き入れる引込み線としての光ドロップケーブルに関するものである。 The present invention relates to an optical drop cable that is used outdoors and serves as a lead-in wire that is drawn from an overhead wire to an attachment point at a place of demand.
架空に敷設された配線系ケーブルから一般加入者宅へ引き込み配線するための、いわゆる光ドロップケーブルとして、単心光ファイバ心線の両側または片側に鋼線あるいはＦＲＰ（ガラス繊維強化プラスチック）などからなる抗張力体を配置し、これらを低密度ポリエチレンや塩化ビニルなどの樹脂で一括被覆し、かかるケーブルにさらに支持線を沿わせ一体化したものが知られている（特許文献１）。 As a so-called optical drop cable for drawing and wiring from an aerial wiring system cable to a general subscriber's house, it consists of steel wire or FRP (glass fiber reinforced plastic) on both sides or one side of a single-core optical fiber core wire There is known a structure in which tensile strength members are arranged, these are collectively covered with a resin such as low-density polyethylene or vinyl chloride, and a supporting wire is further integrated along such a cable (Patent Document 1).
しかしながら、上記低密度ポリエチレンなどで被覆したのでは、機械的強度は低く、摩擦係数が大きいため、敷設（引き込み）作業時の滑りが悪く、光ファイバ心線に負荷がかかり伝送特性の低下を招くおそれがある。 However, when coated with the above-mentioned low density polyethylene or the like, the mechanical strength is low and the coefficient of friction is large, so slipping during installation (retraction) work is poor, and a load is applied to the optical fiber core wire, resulting in a decrease in transmission characteristics. There is a fear.
また近年、主に西日本でセミ（特にクマゼミ）の産卵管がケーブルを貫通し、光ファイバを損傷させる被害が多発している。 Moreover, in recent years, mainly in western Japan, semi-occupied (especially Kumazemi) egg-laying tubes have penetrated the cable, and damage to optical fibers has frequently occurred.
そこで、本発明の目的は、上記課題に対処してなされたもので、機械的強度を高くし、動摩擦係数を下げることによって引き込み作業を容易にし、また耐クマゼミ性を備えた架空光ドロップケーブルを提供するものである。さらに、従来の難燃性を維持したまま、これらの機能を有する架空光ドロップケーブルを提供するものである。 Accordingly, an object of the present invention has been made in response to the above-described problems, and an aerial optical drop cable having high mechanical strength, facilitating the drawing work by lowering the coefficient of dynamic friction, and having couma resistance. It is to provide. Furthermore, the overhead optical drop cable which has these functions is provided, maintaining the conventional flame retardance.
上記目的を達成するために請求項１の発明は、高密度ポリエチレン６０〜９０質量部、エラストマ４０〜１０質量部からなるベースポリマ１００質量部に対して、脂肪酸アミド０．１〜３質量部含む樹脂組成物で、樹脂被覆層を形成したことを特徴とする架空光ドロップケーブルである。
In order to achieve the above object, the invention of
請求項２の発明は、エラストマが、天然ゴム、ポリイソブチレン、ポリイソプレン、ブチルゴム、ニトリルブチルゴム、エチレン−プロピレン共重合体、エチレン−プロピレン−ジエン共重合体、エチレン−ブテン共重合体、エチレン−オクテン共重合体、スチレン−ブタジエン−スチレン共重合体、スチレン−イソプレン−スチレン共重合体、スチレン−イソプレン−ブタジエン−スチレン共重合体等のブロック共重合体、あるいはスチレン−エチレン−ブテン−スチレン共重合体、スチレン−エチレン−プロピレン−スチレン共重合体、スチレン−ブタジエン−ブチレン−スチレン共重合体（部分水素添加スチレン−ブタジエン−スチレン共重合体）等のブロック共重合体の部分又は完全水添物からなる群より選ばれる少なくとも２種類以上である請求項１記載の架空光ドロップケーブルである。
The invention of claim 2 is characterized in that the elastomer is natural rubber, polyisobutylene, polyisoprene, butyl rubber, nitrile butyl rubber, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-butene copolymer, ethylene-octene. Copolymers, block copolymers such as styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, styrene-isoprene-butadiene-styrene copolymers, or styrene-ethylene-butene-styrene copolymers A part of a block copolymer such as styrene-ethylene-propylene-styrene copolymer, styrene-butadiene-butylene-styrene copolymer (partially hydrogenated styrene-butadiene-styrene copolymer) or a completely hydrogenated product. At least two types selected from the group A fictitious optical drop cable according to
請求項３の発明は、ベースポリマ１００質量部に対して、ノンハロゲン難燃剤を１０〜５０質量部、難燃助剤を０．５〜１０質量部含ませた請求項１記載の架空光ドロップケーブルである。
The invention according to claim 3 is the aerial optical drop cable according to
請求項４の発明は、ベースポリマ１００質量部に対して、ノンハロゲン難燃剤として金属水酸化物を１０〜５０質量部、難燃助剤として赤燐を０．５〜１０質量部含ませた請求項１記載の架空光ドロップケーブルである。
The invention of claim 4 comprises 10 to 50 parts by mass of a metal hydroxide as a non-halogen flame retardant and 0.5 to 10 parts by mass of red phosphorus as a flame retardant aid with respect to 100 parts by mass of the base polymer.
本発明によれば、樹脂被覆層の機械的強度が高く、動摩擦係数が低いため、引き込み作業が容易となり、また樹脂被覆層の動摩擦係数が低いため、クマゼミの産卵管をケーブル表面で滑らせ、産卵管の侵入を防ぐことができる。また、従来の難燃性を維持したまま、これらの機能を有する架空光ドロップケーブルとすることが可能である。 According to the present invention, since the mechanical strength of the resin coating layer is high and the coefficient of dynamic friction is low, the pull-in operation is facilitated, and the coefficient of dynamic friction of the resin coating layer is low, so Invasion of the laying tube can be prevented. Moreover, it is possible to provide an aerial optical drop cable having these functions while maintaining the conventional flame retardancy.
以下、本発明の好適な一実施の形態を添付図面に基づいて詳述する。 A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.
先ず図１により、架空光ドロップケーブルを説明する。 First, an aerial optical drop cable will be described with reference to FIG.
図１において、１０は光ファイバ心線、１１、１１は抗張力体、１２は支持線で、光ファイバ心線１０の上下に抗張力体１１、１１が配置され、その上部の抗張力体１１上に支持線１２が配置され、これら支持線１２、抗張力体１１、１１、光ファイバ心線１０を、後述する樹脂組成物で押出被覆して樹脂被覆層１３を形成した架空光ドロップケーブルが形成される。
In FIG. 1, 10 is an optical fiber core, 11 and 11 are strength members, and 12 is a support wire.
樹脂被覆層１３は、支持線１２を被覆する支持線被覆部１３ａと、抗張力体１１、１１、光ファイバ心線１０を被覆する断面四角形状のファイバ被覆部１３ｂと、支持線被覆部１３ａとファイバ被覆部１３ｂを連結する首部１３ｃとから構成され、そのファイバ被覆部１３ｂの両側に光ファイバ心線１０を引き出すための切り欠き部１４が形成される。
The
さて、本発明においては、樹脂被覆層１３の機械的強度を高く、動摩擦係数を下げるべく、高密度ポリエチレンとエラストマからなるベースポリマに、脂肪酸アミドを含ませるようにしたものである。
In the present invention, in order to increase the mechanical strength of the
より具体的には、本発明は、樹脂被覆層１３を構成する樹脂組成物が、高密度ポリエチレン６０〜９０質量部、エラストマ１０〜４０質量部からなるベースポリマ１００質量部に対して、脂肪酸アミドを０．１〜３質量部含ませたものである。
More specifically, in the present invention, the resin composition constituting the
また、ベースポリマ１００質量部に対して、ノンハロゲン難燃剤を１０〜５０質量部含み、ノンハロゲン難燃助剤を０．５〜１０質量部を含ませてもよい。 Moreover, 10-50 mass parts of non-halogen flame retardants may be included with respect to 100 mass parts of the base polymer, and 0.5-10 mass parts of non-halogen flame retardant aids may be included.
さらに、ベースポリマ１００質量部に対して、ノンハロゲン難燃剤として金属水酸化物を１０〜５０質量部、難燃助剤として赤燐を０．５〜１０質量部を含ませてもよい。 Furthermore, 10 to 50 parts by mass of a metal hydroxide as a non-halogen flame retardant and 0.5 to 10 parts by mass of red phosphorus as a flame retardant aid may be included with respect to 100 parts by mass of the base polymer.
高密度ポリエチレンの配合量は６０〜９０質量部であり、７５〜８５質量部であることがより好ましい。高密度ポリエチレンの配合量が６０質量部未満では、動摩擦係数が高くなり、９０質量部より多いと、伸びが低下する。 The blending amount of the high density polyethylene is 60 to 90 parts by mass, and more preferably 75 to 85 parts by mass. When the blending amount of the high density polyethylene is less than 60 parts by mass, the coefficient of dynamic friction becomes high, and when it exceeds 90 parts by mass, the elongation decreases.
エラストマは、天然ゴム、ポリイソブチレン、ポリイソプレン、ブチルゴム、ニトリルブチルゴム、エチレン−プロピレン共重合体、エチレン−プロピレン−ジエン共重合体、エチレン−ブテン共重合体、エチレン−オクテン共重合体、スチレン−ブタジエン−スチレン共重合体、スチレン−イソプレン−スチレン共重合体、スチレン−イソプレン−ブタジエン−スチレン共重合体等のブロック共重合体、あるいはスチレン−エチレン−ブテン−スチレン共重合体、スチレン−エチレン−プロピレン−スチレン共重合体、スチレン−ブタジエン−ブチレン−スチレン共重合体（部分水素添加スチレン−ブタジエン−スチレン共重合体）等のブロック共重合体の部分又は完全水添物からなる群より選ばれるものが好ましく、さらに少なくとも２種、もしくは３種以上を混合したものであることがより好ましく、さらにはエチレン−プロピレン共重合体、エチレン−プロピレン−ジエン共重合体、エチレン−ブテン共重合体、エチレン−オクテン共重合体からなる群より選ばれる少なくとも２種、もしくは３種以上を混合したものであることが好ましく、これらの中でもエチレン−ブテン共重合体とエチレン−オクテン共重合体の組み合わせがより好ましく、これはエチレン−ブテン共重合体が、単体では伸び特性にあまり寄与しないものの、伸び特性を大幅に向上するエチレン−オクテン共重合体と高密度ポリエチレンの相溶化剤の役割を果たすと考えられるためである。 Elastomers are natural rubber, polyisobutylene, polyisoprene, butyl rubber, nitrile butyl rubber, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, styrene-butadiene. -Styrene copolymer, styrene-isoprene-styrene copolymer, block copolymer such as styrene-isoprene-butadiene-styrene copolymer, styrene-ethylene-butene-styrene copolymer, styrene-ethylene-propylene- Preferred are those selected from the group consisting of a part of a block copolymer such as a styrene copolymer, a styrene-butadiene-butylene-styrene copolymer (partially hydrogenated styrene-butadiene-styrene copolymer) or a fully hydrogenated product. And at least 2 more Or a mixture of three or more, more preferably a group consisting of ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-butene copolymer, ethylene-octene copolymer. It is preferable that at least two selected from the above, or a mixture of three or more, more preferably a combination of an ethylene-butene copolymer and an ethylene-octene copolymer, which is an ethylene-butene copolymer. This is because, although the coalesced substance does not contribute much to the elongation characteristics by itself, it is considered to play a role as a compatibilizing agent for the ethylene-octene copolymer and the high-density polyethylene that greatly improve the elongation characteristics.
本発明において、エラストマの配合量は１０〜４０質量部であり、１５〜２５質量部であることがより好ましい。エラストマの配合量が１０質量部未満では十分な伸びが得られず、４０質量部より多いと機械強度が低下する。 In this invention, the compounding quantity of an elastomer is 10-40 mass parts, and it is more preferable that it is 15-25 mass parts. When the blending amount of the elastomer is less than 10 parts by mass, sufficient elongation cannot be obtained, and when it exceeds 40 parts by mass, the mechanical strength is lowered.
またベースポリマに添加する脂肪酸アミドとしては、ステアロアミド、エルカ酸アミド、オレイン酸アミド、ベヘニン酸アミド、エチレンビスステアロアミド、オレイルパルミドアミド、ステアリルエルクアミド、ステアリルオレイルアミド及びオレイン酸ビスアミドが挙げられる。これらは、単独または２種以上を併用しても良い。 Examples of the fatty acid amide added to the base polymer include stearoamide, erucic acid amide, oleic acid amide, behenic acid amide, ethylene bisstearamide, oleyl palmamide amide, stearyl erucamide, stearyl oleylamide and oleic acid bisamide. These may be used alone or in combination of two or more.
本発明において、脂肪酸アミドの添加量は、ベースポリマ１００質量部に対して、０．１〜３質量部であり、０．３〜１質量部であることがより好ましい。脂肪酸アミドの添加量が０．１質量部より少ないと、ブリードする脂肪酸アミドの量が少なく動摩擦係数が十分に低くならず、３質量部より多いとブリードする脂肪酸アミドの量が多くなり、その結果として粘着性が高くなり、動摩擦係数が高くなる。 In this invention, the addition amount of fatty acid amide is 0.1-3 mass parts with respect to 100 mass parts of base polymers, and it is more preferable that it is 0.3-1 mass part. When the amount of fatty acid amide added is less than 0.1 parts by mass, the amount of fatty acid amide to bleed is small and the dynamic friction coefficient is not sufficiently low, and when it exceeds 3 parts by mass, the amount of fatty acid amide to bleed increases. As a result, the tackiness is increased and the dynamic friction coefficient is increased.
ベースポリマに添加するノンハロゲン難燃剤としては、水酸化マグネシウム、水酸化アルミニウム、水酸化カルシウム及びこれらのニッケルが固溶した金属水酸化物が挙げられる。また、シランカップリング剤、チタネート系カップリング剤、ステアリン酸塩やステアリン酸カルシウム等の脂肪酸、又は脂肪酸金属塩等によって表面処理されているものを用いても差し支えない。 Examples of the non-halogen flame retardant added to the base polymer include magnesium hydroxide, aluminum hydroxide, calcium hydroxide, and metal hydroxide in which these nickels are dissolved. In addition, a silane coupling agent, a titanate coupling agent, a fatty acid such as stearate or calcium stearate, or a surface treated with a fatty acid metal salt may be used.
ベースポリマに添加するノンハロゲン難燃剤の添加量は、ベースポリマ１００質量部に対して、１０〜５０質量部であり、２０〜４０質量部であることがより好ましい。ノンハロゲン難燃剤の添加量が１０質量部より少ないと十分な難燃性が得られず、５０質量部より多いと機械特性が著しく低下するおそれがある。 The addition amount of the non-halogen flame retardant added to the base polymer is 10 to 50 parts by mass, and more preferably 20 to 40 parts by mass with respect to 100 parts by mass of the base polymer. When the addition amount of the non-halogen flame retardant is less than 10 parts by mass, sufficient flame retardancy cannot be obtained, and when it is more than 50 parts by mass, the mechanical properties may be remarkably deteriorated.
ベースポリマに添加するノンハロゲン難燃助剤としては、メラミン、シアヌル酸、イソシアヌル酸、メラミンシアヌレート、硫酸メラミン等の１，３，５−トリアジン誘導体、赤燐からなる群より選ばれる少なくとも１種、もしくは２種以上を混合したものであることが好ましく、赤燐であることがより好ましい。 As the non-halogen flame retardant auxiliary agent added to the base polymer, at least one selected from the group consisting of 1,3,5-triazine derivatives such as melamine, cyanuric acid, isocyanuric acid, melamine cyanurate, melamine sulfate, red phosphorus, Or it is preferable to mix 2 or more types, and it is more preferable that it is red phosphorus.
本発明において、ノンハロゲン難燃助剤の添加量は、ベースポリマ１００質量部に対して、０．５〜１０質量部であり２〜５質量部であることがより好ましい。添加量が０．５質量部より少ないと十分な難燃性が得られず、１０質量部より多いと機械特性が著しく低下するおそれがある。 In this invention, the addition amount of a non-halogen flame retardant adjuvant is 0.5-10 mass parts with respect to 100 mass parts of base polymers, and it is more preferable that it is 2-5 mass parts. If the addition amount is less than 0.5 parts by mass, sufficient flame retardancy cannot be obtained, and if it is more than 10 parts by mass, the mechanical properties may be significantly deteriorated.
また、上記の配合剤以外にも必要に応じて他の脂肪酸などの滑剤、酸化防止剤、無機充填剤、安定剤、カーボンブラック、着色剤等の添加剤を加えることが可能である。 In addition to the above compounding agents, additives such as lubricants such as other fatty acids, antioxidants, inorganic fillers, stabilizers, carbon black, and colorants can be added as necessary.
次に実施例と比較例を説明する。 Next, examples and comparative examples will be described.
図１で説明した架空光ドロップケーブルを作製した。 The aerial optical drop cable described in FIG. 1 was produced.
単心光ファイバ心線１０には、外径２５０μｍの単心紫外線硬化型樹脂被覆光ファイバ心線を用い、抗張力体１１には、外径０．５ｍｍのアラミドＦＲＰロッドを用い、支持線１２には、外径１．２ｍｍの単鋼線を用いた。
A single-core UV curable resin-coated optical fiber core having an outer diameter of 250 μm is used for the single-core
表１に示した配合割合で各種成分を配合し、加圧ニーダによって２００℃で混練後、混練物をペレットにし、これをシース（樹脂被覆層）として、光ファイバ心線と２本の抗張力体と支持線とを図１に示すように平行に並べた状態で１８０℃で一括押出被覆して、全体の幅が約２ｍｍ、同高さが約５ｍｍの架空光ドロップケーブルを作製した。 Various components are blended at the blending ratios shown in Table 1, kneaded at 200 ° C. with a pressure kneader, the kneaded product is pelletized, and this is used as a sheath (resin coating layer) to form an optical fiber core and two strength members As shown in FIG. 1, the support wire and the support wire were collectively extrusion coated at 180 ° C. to produce an aerial optical drop cable having a total width of about 2 mm and a height of about 5 mm.
架空光ドロップケーブルの評価は以下に示す方法により判定した。 The evaluation of the overhead optical drop cable was determined by the following method.
（１）引張試験
作製したペレットをロールで混練し、１ｍｍシートにプレス成型後、ＪＩＳＣ３００５に準拠して引張試験を行い、伸び３００％以上、引張強さ１２ＭＰａ以上を目標値とした。
(1) Tensile test The prepared pellets were kneaded with a roll, press-molded into a 1 mm sheet, and then subjected to a tensile test according to JISC3005. The elongation was 300% or more and the tensile strength was 12 MPa or more.
（２）動摩擦係数測定
作製したケーブルを、ＪＩＳＫ７１２５に準拠して動摩擦係数を測定し、０．５未満を目標値とした。
(2) Dynamic friction coefficient measurement The dynamic friction coefficient of the produced cable was measured in accordance with JISK7125, and the target value was less than 0.5.
（３）難燃性試験
作製したケーブルを、ＪＩＳＣ３００５に準拠して６０度傾斜燃焼試験を行い、炎を取り去った後の延焼時間を測定し、６０秒以内に自然消火したものを合格とした。
(3) Flame Retardancy Test The prepared cable was subjected to a 60-degree inclined combustion test in accordance with JISC3005, the fire spread time after removing the flame was measured, and the fire extinguisher within 60 seconds was regarded as acceptable.
（４）耐クマゼミ性判定試験
クマゼミの生息地域である沖縄県西原町にて実験を行った。実験は縦１ｍ×横１ｍ×高さ２ｍのケージを準備し、ケージ内に雌のクマゼミを１０匹放して行った。このケージ内には、作製したケーブルが格子状に張り渡されている。クマゼミの成虫は寿命が短いため、餌となる樹液を確保するために、クマゼミが好む樹木をケージの中央に配置した。
(4) Koma-zemi-resistant judgment test An experiment was conducted in Nishihara-cho, Okinawa, where Kuma-zemi is inhabited. The experiment was performed by preparing a cage of 1 m in length, 1 m in width, and 2 m in height, and releasing 10 female bears in the cage. In the cage, the produced cables are stretched in a lattice pattern. Since adults of Kumaemi are short-lived, a tree preferred by Komazemi was placed in the center of the cage in order to secure sap for food.
７日後にケーブルを取出し、目視による観察を行い、外観が損傷していれば不合格（×）、損傷が見られなければ合格（○）とした。
判定として引張強さ、動摩擦係数、難燃性、耐クマゼミ性のいずれも良好なものを二重○、引張強さ、動摩擦係数、耐クマゼミ性が良好なものを○とした。
After 7 days, the cable was taken out and visually observed. If the appearance was damaged, it was rejected (x), and if no damage was found, it was determined to be acceptable (◯).
As a judgment, those having good tensile strength, dynamic friction coefficient, flame retardancy, and kuma-zemi resistance were all marked with double ◯, and those with good tensile strength, dynamic friction coefficient, and kuma-zemi-resistance were marked with ◯.
本発明の架空光ドロップケーブルの実施例を表１に、また上記と同様にして作製した比較例を表２に示す。 Examples of the aerial optical drop cable of the present invention are shown in Table 1, and comparative examples produced in the same manner as described above are shown in Table 2.
実施例１〜２２では引張強さ、伸び、動摩擦係数は目標を満足しており、６０度傾斜燃焼試験、耐クマゼミ性判定試験も全て合格し、良好な特性を示している。また実施例２３，２４では６０度傾斜燃焼試験は不合格だったものの引張強さ、伸び、動摩擦係数は良好な特性を示している。 In Examples 1 to 22, the tensile strength, the elongation, and the dynamic friction coefficient satisfy the targets, and all of the 60-degree inclined combustion test and the kuma-zemi resistance determination test pass and show good characteristics. In Examples 23 and 24, although the 60-degree inclined combustion test was rejected, the tensile strength, elongation, and dynamic friction coefficient showed good characteristics.
これに対し、表２に示すように、ベースポリマに低密度ポリエチレンを用いている比較例１、高密度ポリエチレンの配合量が規定より少ない比較例２は、動摩擦係数が高く、耐クマゼミ性が不十分である。高密度ポリエチレンの配合量が規定を上回る比較例３、金属水酸化物添加量が規定を上回る比較例４及び、赤燐の添加量が規定を上回る比較例５においては、引張強さ、伸びが不十分となった。また脂肪酸アミドの添加量が規定を下回る比較例６及び脂肪酸アミドの添加量が規定を上回る比較例７は動摩擦係数が高くなり、耐クマゼミ性が不十分となった。 On the other hand, as shown in Table 2, Comparative Example 1 in which low density polyethylene is used as the base polymer and Comparative Example 2 in which the blending amount of high density polyethylene is less than the specified amount have a high coefficient of dynamic friction and poor resistance to kuma-zemi. It is enough. In Comparative Example 3 in which the blending amount of high-density polyethylene exceeds the specified value, Comparative Example 4 in which the amount of metal hydroxide added exceeds the specified value, and Comparative Example 5 in which the amount of red phosphorus added exceeds the specified value, the tensile strength and elongation are It became insufficient. Further, Comparative Example 6 in which the amount of fatty acid amide added was less than the specified value and Comparative Example 7 in which the amount of fatty acid amide added was higher than the specified value had a high coefficient of dynamic friction and insufficient kuma-zemi resistance.
１０ 光ファイバ心線
１１ 抗張力体
１２ 支持線
１３ 樹脂被覆層
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| JP2012145758A (en) * | 2011-01-12 | 2012-08-02 | Fujikura Ltd | Optical fiber cable |
| US9261665B2 (en) | 2013-08-09 | 2016-02-16 | Seiwa Electric Mfg. Co., Ltd. | Locking devise for optical drop cable |
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| JP2007183477A (en) * | 2006-01-10 | 2007-07-19 | Furukawa Electric Co Ltd:The | Fiber optic cable |
| WO2008090880A1 (en) * | 2007-01-24 | 2008-07-31 | The Furukawa Electric Co., Ltd. | Optical fiber cable |
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| US9261665B2 (en) | 2013-08-09 | 2016-02-16 | Seiwa Electric Mfg. Co., Ltd. | Locking devise for optical drop cable |
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