JP2918900B2 - Watertight conductor - Google Patents
Watertight conductorInfo
- Publication number
- JP2918900B2 JP2918900B2 JP1063309A JP6330989A JP2918900B2 JP 2918900 B2 JP2918900 B2 JP 2918900B2 JP 1063309 A JP1063309 A JP 1063309A JP 6330989 A JP6330989 A JP 6330989A JP 2918900 B2 JP2918900 B2 JP 2918900B2
- Authority
- JP
- Japan
- Prior art keywords
- watertight
- compound
- polymerization
- degree
- conductor
- 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 - Fee Related
Links
- 239000004020 conductor Substances 0.000 title claims description 21
- 150000001875 compounds Chemical class 0.000 claims description 40
- 229920001897 terpolymer Polymers 0.000 claims description 25
- 238000006116 polymerization reaction Methods 0.000 claims description 24
- 239000004014 plasticizer Substances 0.000 claims description 18
- OAWKUMDOADACKG-UHFFFAOYSA-N chloroethene;ethenyl acetate;prop-2-enoic acid Chemical compound ClC=C.OC(=O)C=C.CC(=O)OC=C OAWKUMDOADACKG-UHFFFAOYSA-N 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- -1 phthalate ester Chemical class 0.000 claims description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims 1
- 239000012212 insulator Substances 0.000 description 14
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 6
- 239000011342 resin composition Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 102100035474 DNA polymerase kappa Human genes 0.000 description 2
- 101710108091 DNA polymerase kappa Proteins 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229940125782 compound 2 Drugs 0.000 description 1
- 229940126214 compound 3 Drugs 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、導体素線間および外周にそれぞれ水密コン
パウンドを被覆充填してなる水密導体に関する。[Detailed Description of the Invention] (Object of the Invention) (Industrial application field) The present invention relates to a watertight conductor formed by coating and filling a watertight compound between conductor strands and an outer periphery thereof.
（従来の技術） 一般に架空配電線や海底電線においては、長期間の使
用中に導体素線の酸化や腐蝕に起因する異常断線事故が
生じることがある。そしてこのような導体腐蝕などの主
な原因は、電線のシースや端部等から雨水等の水分が浸
入することによるものと考えられている。(Prior Art) In general, in the case of an overhead distribution line or a submarine line, an abnormal disconnection accident due to oxidation or corrosion of a conductor wire may occur during long-term use. It is considered that the main cause of such corrosion of the conductor is that moisture such as rainwater infiltrates from a sheath or an end portion of the electric wire.
そのため水分などの浸入を防止する目的で、従来から
電線全長に亘り、導体素線間および外周に水密コンパウ
ンドを被覆充填することが行われている。そしてこのよ
うな水密コンパウンドとしては、水密効果、導体や絶縁
体との密着性、押出加工性、接続の際の剥離性（皮剥ぎ
性）等を考慮して各種材料が検討されているが、一般に
ポリオレフィン、エチレン−酢酸ビニル共重合体（EV
A）、エチレン−エチルアクリレート共重合体（EEA）な
どのオレフィン系ポリマーをベースとしたものが使用さ
れている。Therefore, for the purpose of preventing infiltration of moisture and the like, a watertight compound has been conventionally coated and filled over the entire length of the electric wire between the conductor strands and the outer periphery. As such a water-tight compound, various materials have been studied in consideration of a water-tight effect, adhesion to a conductor or an insulator, extrudability, peelability (peeling property) at the time of connection, and the like. Generally, polyolefin, ethylene-vinyl acetate copolymer (EV
A), those based on olefin polymers such as ethylene-ethyl acrylate copolymer (EEA) are used.
（発明が解決しようとする課題） しかしながらこのようなオレフィン系の水密コンパウ
ンドを使用した電線、ケーブルにおいては、絶縁体が塩
化ビニル樹脂組成物からなる場合、水密コンパウンドと
絶縁体との誘電体が大きく異なるため、耐電圧特性が低
下してしまうという難点があった。(Problems to be Solved by the Invention) However, in an electric wire or cable using such an olefin-based watertight compound, when the insulator is made of a vinyl chloride resin composition, the dielectric between the watertight compound and the insulator is large. Because of the difference, there was a problem that the withstand voltage characteristics were reduced.
また塩化ビニル樹脂組成物中に配合された可塑剤が水
密コンパウンド中へ移行しやすいため、絶縁体の機械的
特性が低下してしまうという難点があった。In addition, since the plasticizer incorporated in the vinyl chloride resin composition easily migrates into the watertight compound, there has been a problem that the mechanical properties of the insulator deteriorate.
本発明はこのような従来の難点を解消するためになさ
れたもので、優れた水密特性と接続時などの剥離性を兼
ね備え、かつ絶縁体が塩化ビニル樹脂組成物からなる場
合であっても、その電気的、機械的特性を低下させるこ
とがない水密導体を提供することを目的とする。The present invention has been made in order to solve such conventional difficulties, and has both excellent watertightness and releasability at the time of connection, and even when the insulator is made of a vinyl chloride resin composition, It is an object of the present invention to provide a watertight conductor that does not deteriorate its electrical and mechanical properties.
〔発明の構成〕 （課題を解決するための手段） 本発明の水密導体は、複数本の素線を撚り合せ、各素
線間およびその外周に水密コンパウンドを被覆充填して
なる水密導体において、重合度が200〜600の塩化ビニル
−酢酸ビニル−アクリル酸三元共重合体を主体とする水
密コンパウンド100重量部あたり、フタル酸エステル系
または脂肪酸エステル系の可塑剤を50〜100重量部配合
した水密コンパウンドを各素線間に充填するとともに、
重合度が650〜1200の塩化ビニル−酢酸ビニル−アクリ
ル酸三元共重合体を主体とする水密コンパウンド100重
量部あたり、フタル酸エステル系または脂肪酸エステル
系の可塑剤を10〜70重量部を配合した水密コンパウンド
を外周に被覆してなることを特徴としている。(Means for Solving the Problems) The watertight conductor of the present invention is a watertight conductor obtained by twisting a plurality of strands and covering and filling a watertight compound between and around the strands. Per 100 parts by weight of a watertight compound mainly composed of a vinyl chloride-vinyl acetate-acrylic acid terpolymer having a degree of polymerization of 200 to 600, 50 to 100 parts by weight of a phthalate or fatty acid ester plasticizer was blended. While filling the watertight compound between each strand,
10 to 70 parts by weight of a phthalate or fatty acid ester plasticizer is blended per 100 parts by weight of a watertight compound mainly composed of a vinyl chloride-vinyl acetate-acrylic acid terpolymer having a degree of polymerization of 650 to 1200. It is characterized by covering the outer periphery with a watertight compound.
本発明に使用される塩化ビニル−酢酸ビニル−アクリ
ル酸三元共重合体は、次の一般式で示されるものであ
り、特に酢酸ビニルおよびアクリル酸の含有率が、それ
ぞれ１〜15重量％および１〜７重量％のものが好適して
いる。The vinyl chloride-vinyl acetate-acrylic acid terpolymer used in the present invention is represented by the following general formula. Particularly, the content of vinyl acetate and acrylic acid is 1 to 15% by weight and Those having 1 to 7% by weight are suitable.
そして本発明においては、これらの三元共重合体の中
で平均重合度が200〜600と低いものをベースとした水密
コンパウンドを導体素線間に充填し、重合度が650〜120
0とより高いものをベースとした水密コンパウンドを最
外層の素線の外周に被覆する。 And, in the present invention, among these terpolymers, the average degree of polymerization is filled with a water-tight compound based on a low one of 200 to 600 between the conductor strands, and the degree of polymerization is 650 to 120.
A watertight compound based on 0 or higher is coated on the outer periphery of the outermost strand.
充填用の水密コンパウンドのベースとなる三元共重合
体の重合度を200〜600の範囲に限定したのは、重合度が
200未満の三元共重合体をベースとしたコンパウンドで
は、特性が不充分で充填作業が困難であり、反対に重合
度が600を越える三元共重合体をベースとしたコンパウ
ンドを使用した場合には、コンパウンドの流動性並びに
充填性が悪いため、水密性が不充分となるためである。The reason for limiting the degree of polymerization of the terpolymer as the base of the watertight compound for filling to the range of 200 to 600 is that the degree of polymerization is
Compounds based on terpolymers less than 200 have insufficient properties and are difficult to fill, and conversely, when a compound based on a terpolymer having a degree of polymerization of more than 600 is used, Is because the fluidity and the filling property of the compound are poor and the watertightness becomes insufficient.
また被覆用の水密コンパウンドのベースとなる三元共
重合体の重合度を650〜1200の範囲に限定したのは、重
合度が650未満の三元共重合体をベースとするコンパウ
ンドを使用した場合には、コンパウンドの引張り強度が
低いため皮剥ぎの際に切れやすく、反対に重合度が1200
を越える三元共重合体をベースとしたコンパウンドを使
用した場合には、絶縁体や導体との密着性が低く水密性
が不充分になるためである。The reason why the degree of polymerization of the terpolymer used as the base of the watertight compound for coating is limited to the range of 650 to 1200 is when the compound based on the terpolymer having a degree of polymerization of less than 650 is used. Has a low tensile strength and is easy to cut when peeling.
This is because, when a compound based on a terpolymer exceeding 30% is used, the adhesion to an insulator or a conductor is low and the watertightness is insufficient.
さらに本発明に使用される水密コンパウンドにおいて
は、これらの三元共重合体に可塑剤を配合することが望
ましい。可塑剤としては、ジイソノリルフタレート（DI
NP）のようなフタル酸エステル系の可塑剤と、エポキシ
化大豆油（例えば、アデカアーガス社製のＯ−130P）な
どのエポキシ化植物油の併用が望ましく、特に耐寒性が
要求される場合には、さらにジイソデシルジアジペート
のような脂肪酸エステル系の可塑剤を併用することが望
ましい。Further, in the watertight compound used in the present invention, it is desirable to add a plasticizer to these terpolymers. As a plasticizer, diisonolyl phthalate (DI
It is desirable to use a phthalate-based plasticizer such as NP) together with an epoxidized vegetable oil such as epoxidized soybean oil (for example, O-130P manufactured by Adeka Argus Co.), especially when cold resistance is required. It is desirable to use a fatty acid ester-based plasticizer such as diisodecyl diadipate in combination.
これらの可塑剤の配合量は、素線および絶縁体との密
着性、押出加工性、接続時の剥離性などの観点から、素
線間に充填する水密コンパウンドにおいては多く、外周
に被覆する水密コンパウンドにおいてより少なくするこ
とが望ましい。The amount of these plasticizers is large in the watertight compound filled between the wires, from the viewpoints of the adhesion to the wires and the insulator, the extrudability, the releasability at the time of connection, etc. It is desirable to have less in the compound.
すなわち重合度が400と低い三元共重合体をベースと
する充填用水密コンパウンドにおいては、三元共重合体
100重量部（以下、部と示す。）当り可塑剤を50〜100部
の割合で配合し、重合度が800とより高い三元共重合体
をベースとする被覆用水密コンパウンドにおいては、可
塑剤を10〜70部の割合で配合することが望ましい。さら
に使用する三元共重合体の重合度がそれぞれ400以上お
よび800以上の場合には、それぞれ可塑剤の配合割合を
前記範囲より増加させ、重合度がこれらの値以下の場合
には、可塑剤の配合割合を前記範囲より少なくすること
によって、最適特性を有する水密コンパウンドを得るこ
とができる。That is, in a filling watertight compound based on a terpolymer having a low degree of polymerization of 400, the terpolymer is used.
A plasticizer is blended in a proportion of 50 to 100 parts per 100 parts by weight (hereinafter referred to as "parts"), and in a watertight compound for coating based on a terpolymer having a higher degree of polymerization of 800, a plasticizer is used. In a proportion of 10 to 70 parts. Further, when the degree of polymerization of the terpolymer used is 400 or more and 800 or more, respectively, the mixing ratio of the plasticizer is increased from the above range, and when the degree of polymerization is not more than these values, the plasticizer is used. By making the mixing ratio of the compound less than the above range, a watertight compound having optimum characteristics can be obtained.
（作用） 本発明の水密導体においては、重合度が低い塩化ビニ
ル−酢酸ビニル−アクリル酸三元共重合体をベースと
し、導体との密着性が良く充填が容易な水密コンパウン
ドが各素線間に充填され、高重合度の三元共重合体をベ
ースとし、絶縁体との密着性に優れかつ接続時の剥離性
が良い水密コンパウンドが素線外周に被覆されているの
で、優れた水密性および導体との密着性を有するととも
に、絶縁体が塩化ビニル樹脂組成物からなる場合でも、
耐電圧特性を低下させたり絶縁体中の可塑剤の移行を促
進したりすることがない。(Function) In the watertight conductor of the present invention, a watertight compound which is based on a vinyl chloride-vinylacetate-acrylic acid terpolymer having a low degree of polymerization and has good adhesion to the conductor and is easy to fill is used. Filled with a terpolymer with a high degree of polymerization, and a watertight compound with excellent adhesion to the insulator and good releasability during connection is coated on the outer periphery of the strand, so that excellent watertightness is achieved. And having adhesion to the conductor, even when the insulator is made of a vinyl chloride resin composition,
It does not lower the withstand voltage characteristics or promote the transfer of the plasticizer in the insulator.
（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
図面に示すように、外径2mmφの銅素線１を19本撚り
合せながら各素線１間に、MPR−TMF（日信化学工業社製
の塩化ビニル−酢酸ビニル−アクリル酸三元共重合体の
商品名、重合度400）をベースとし、これにDINPとＯ−1
30Pとを併用した可塑剤を次表に示す割合で配合した充
填用水密コンパウンド２を充填したい。次いでこの外周
に、MPR−VM8（日信化学工業社製の塩化ビニル−酢酸ビ
ニル−アクリル酸三元共重合体の商品名、重合度800）
をベースとし、これにDINPとＯ−130Pとを併用した可塑
剤を同表に示す割合で配合した被覆用水密コンパウンド
３を、約0.1mmの厚さに被覆し、断面積60mmの水密導体
を製造した。As shown in the drawing, an MPR-TMF (a vinyl chloride-vinyl acetate-acrylic acid ternary copolymer manufactured by Nissin Chemical Industry Co., Ltd.) was interposed between each strand 1 while twisting 19 copper strands 1 having an outer diameter of 2 mmφ. Combined product name, degree of polymerization 400), DINP and O-1
I want to fill the filling watertight compound 2 in which a plasticizer combined with 30P is blended in the ratio shown in the following table. Next, MPR-VM8 (trade name of vinyl chloride-vinyl acetate-acrylic acid terpolymer manufactured by Nissin Chemical Co., Ltd., polymerization degree 800)
Based on the above, a coating water-tight compound 3 in which a plasticizer in which DINP and O-130P were used together in a ratio shown in the same table was coated to a thickness of about 0.1 mm, and a water-tight conductor having a cross-sectional area of 60 mm was formed. Manufactured.
次に得られた水密導体の外周に、軟質の塩化ビニル樹
脂をベースとした絶縁体４を押出被覆して水密ケーブル
を製造した。Next, an outer periphery of the obtained watertight conductor was extrusion-coated with an insulator 4 based on a soft vinyl chloride resin to manufacture a watertight cable.
また比較のために表に示すように、充填用および被覆
用の水密コンパウンドとして、重合度が同じ三元共重合
体をベースとし可塑剤の配合量のみが異なる組成物を用
い、実施例と同様にして水密ケーブルを製造した。Also, as shown in the table for comparison, as the watertight compound for filling and coating, using a composition based on the same degree of polymerization of the terpolymer and differing only in the blending amount of the plasticizer, the same as in Examples To produce a watertight cable.
実施例と比較例でそれぞれ得られたケーブルについ
て、水密性と水密コンパウンドの剥離性をそれぞれ以下
に示す方法で調べた。With respect to the cables obtained in the examples and the comparative examples, the watertightness and the peelability of the watertight compound were examined by the following methods.
すなわち水密性は、0.5気圧の水圧を0.6m長のケーブ
ル試料の片端より加え、24時間後に他端から漏水が有る
かどうかによって調べ、水密コンパウンドの剥離性は、
常温および60℃で皮剥ぎが容易かどうかによって調べ
た。That is, the watertightness is determined by applying a water pressure of 0.5 atm from one end of the cable sample having a length of 0.6 m and checking whether there is water leakage from the other end 24 hours later.
At room temperature and at 60 ° C, it was determined whether the skin was easy to peel.
また、カムラーを用い絶縁体に500kg×10分間の張力
を加え、端末ずれが5mm以下で切れがないかどうかによ
って密着性を試験し、さらに低温巻付け試験を行った。
これらの試験結果を次表下欄に示す。Further, a tensile force of 500 kg × 10 minutes was applied to the insulator using a camler, and the adhesion was tested according to whether or not the edge was not cut off at 5 mm or less, and a low-temperature winding test was further performed.
The results of these tests are shown in the lower column of the following table.
〔発明の効果〕 以上の説明したように本発明の水密導体は、低い重合
度の塩化ビニル−酢酸ビニル−アクリル酸三元共重合体
をベースとし、導体素線との密着性が良好で充填性が高
い水密コンパウンドが各素線間に充填され、かつこれら
素線の外周に、前記三元共重合体でも重合度が高いもの
をベースとし、剥離性が良く押出加工性も充分な水密コ
ンパウンドが被覆されているので、優れた水密特性を有
しかつ接続の際の水密コンパウンドの剥離除去が容易で
ある。 [Effects of the Invention] As described above, the watertight conductor of the present invention is based on a vinyl chloride-vinyl acetate-acrylic acid terpolymer having a low degree of polymerization and has good adhesion to the conductor strand and is filled. Highly water-tight compound is filled between the strands, and the outer periphery of these strands is based on a terpolymer having a high degree of polymerization even with the terpolymer, and has good releasability and sufficient extrusion processability. Is coated, so that it has excellent watertight properties and is easy to peel off and remove the watertight compound at the time of connection.
また塩化ビニル樹脂等からなる絶縁体の電気的、機械
的特性を低下させることがない。Also, the electrical and mechanical properties of the insulator made of a vinyl chloride resin or the like are not reduced.
【図面の簡単な説明】 図面は本発明の一実施例を示す横断面図である。 １……銅素線 ２……低重合度の三元共重合体をベースとする充填用の
水密コンパウンド ３……高重合度の三元共重合体をベースとする被覆用の
水密コンパウンド ４……絶縁体BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing one embodiment of the present invention. 1 ... Copper strand 2 ... Watertight compound for filling based on terpolymer of low polymerization degree 3 ... Watertight compound for coating based on terpolymer of high polymerization degree 4 ... …Insulator
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−245815（ＪＰ，Ａ) 特開 昭59−25108（ＪＰ，Ａ) 特開 平１−195613（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-63-245815 (JP, A) JP-A-59-25108 (JP, A) JP-A-1-195613 (JP, A)
Claims (1)
びその外周に水密コンパウンドを被覆充填してなる水密
導体において、重合度が200〜600の塩化ビニル−酢酸ビ
ニル−アクリル酸三元共重合体を主体とする水密コンパ
ウンド100重量部あたり、フタル酸エステル系または脂
肪酸エステル系の可塑剤を50〜100重量部配合した水密
コンパウンドを各素線間に充填するとともに、重合度が
650〜1200の塩化ビニル−酢酸ビニル−アクリル酸三元
共重合体を主体とする水密コンパウンド100重量部あた
り、フタル酸エステル系または脂肪酸エステル系の可塑
剤を10〜70重量部を配合した水密コンパウンドを外周に
被覆してなることを特徴とする水密導体。1. A watertight conductor obtained by twisting a plurality of strands and coating and filling a watertight compound between and around the strands, wherein the degree of polymerization is from 200 to 600. A water-tight compound containing 50 to 100 parts by weight of a phthalate ester-based or fatty acid ester-based plasticizer per 100 parts by weight of the water-tight compound mainly composed of the original copolymer is filled between the strands, and the degree of polymerization is increased.
A water-tight compound containing 10 to 70 parts by weight of a phthalate or fatty acid ester-based plasticizer per 100 parts by weight of a water-tight compound mainly composed of 650 to 1200 vinyl chloride-vinyl acetate-acrylic acid terpolymer. A watertight conductor characterized by being coated on the outer periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1063309A JP2918900B2 (en) | 1989-03-15 | 1989-03-15 | Watertight conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1063309A JP2918900B2 (en) | 1989-03-15 | 1989-03-15 | Watertight conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02242530A JPH02242530A (en) | 1990-09-26 |
| JP2918900B2 true JP2918900B2 (en) | 1999-07-12 |
Family
ID=13225557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1063309A Expired - Fee Related JP2918900B2 (en) | 1989-03-15 | 1989-03-15 | Watertight conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2918900B2 (en) |
-
1989
- 1989-03-15 JP JP1063309A patent/JP2918900B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02242530A (en) | 1990-09-26 |
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