JPS6010409B2 - Coaxial cable manufacturing method - Google Patents
Coaxial cable manufacturing methodInfo
- Publication number
- JPS6010409B2 JPS6010409B2 JP57134199A JP13419982A JPS6010409B2 JP S6010409 B2 JPS6010409 B2 JP S6010409B2 JP 57134199 A JP57134199 A JP 57134199A JP 13419982 A JP13419982 A JP 13419982A JP S6010409 B2 JPS6010409 B2 JP S6010409B2
- Authority
- JP
- Japan
- Prior art keywords
- coaxial cable
- pipe
- tape
- protective coating
- cable manufacturing
- 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
Links
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
Landscapes
- Manufacturing Of Electric Cables (AREA)
- Communication Cables (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【発明の詳細な説明】 本発明は耐熱性をそなえた同軸ケーブルの改良に係る。[Detailed description of the invention] The present invention relates to an improvement of a coaxial cable with heat resistance.
近年同軸ケーブルは地下街や屋内に架設される機会が多
くなっており、特に防災システムなどの用途には耐熱性
の良いものが要求されている。従釆この種のケープとし
ては第１図に示すような空隙型絶縁構造のものが使われ
ることが多い、第１図において１は内部導体、２は内部
導体上にらせん状に巻付けられた絶縁体紐、３は絶縁体
パイプ、４はガラステープなどの耐熱性テープの巻回層
、５は鋼あるいはアルミテープから成る外部導体、６は
支持線、７は塩化ビニル等から成る保護被覆である。こ
の種のものは耐熱性を良くするため、絶縁体紐２として
電子線照射を施した架橋ポリエチレン紐が用いられるこ
ともあるが、この場合巻付け時の応力が紐の内部に残留
する。この残留応力は架橋されないポリエチレンの場合
も認められるが、特に架橋されたポリエチレンの場合に
著しい。従ってこの種のケーブルは高温にさらされた場
合紐の移動、ねじれ等が生じやすく、第１図のような内
部導体に対する直立性が保てず、内部導体円周方向向き
に倒れたりして構造が不安定となり、伝送特性が劣化す
るという欠点がある。In recent years, coaxial cables have been increasingly installed in underground malls and indoors, and especially for applications such as disaster prevention systems, cables with good heat resistance are required. This type of cape often has a void-type insulation structure as shown in Figure 1. In Figure 1, 1 is an internal conductor, and 2 is a cape wound spirally around the internal conductor. Insulator string, 3 is an insulator pipe, 4 is a wound layer of heat-resistant tape such as glass tape, 5 is an outer conductor made of steel or aluminum tape, 6 is a support wire, 7 is a protective coating made of vinyl chloride, etc. be. In order to improve the heat resistance of this type of wire, a crosslinked polyethylene string irradiated with an electron beam is sometimes used as the insulator string 2, but in this case, stress during winding remains inside the string. Although this residual stress is observed even in non-crosslinked polyethylene, it is particularly noticeable in crosslinked polyethylene. Therefore, when this type of cable is exposed to high temperatures, the strings tend to move or twist, and the cable cannot maintain uprightness with respect to the internal conductor as shown in Figure 1, causing the internal conductor to fall in the circumferential direction. It has the disadvantage that it becomes unstable and the transmission characteristics deteriorate.
本発明はこの欠点を解消するもので、以下第２図の実施
例をもとに詳細に説明する。第２図において８はアルミ
又は銅の内部導体で必ずしもパイプ状でなくてもよい。The present invention solves this drawback and will be described in detail below based on the embodiment shown in FIG. In FIG. 2, reference numeral 8 denotes an internal conductor made of aluminum or copper, which does not necessarily have to be in the shape of a pipe.
９−１はポリエチレン等の熱可塑性樹脂から成るらせん
状に押出された紐、９一２は９−１と同じ材料によるパ
イプで９一１と９一２は同時に押出され一体成形された
後、電子線照射によって架橋され絶縁体９となる。9-1 is a spirally extruded string made of thermoplastic resin such as polyethylene, 9-2 is a pipe made of the same material as 9-1, and 9-1 and 9-2 are extruded at the same time and integrally formed. The insulator 9 is crosslinked by electron beam irradiation.
１０はガラステープなどの耐熱テープで一層または複数
層巻回される。10 is wound in one or more layers with a heat-resistant tape such as glass tape.
１１はアルミテープ又は銅テープから成る外部導体で、
藤巻きあるいは縦添えの場合波形をつけて屈曲性を良く
したり、開放形同軸としてスロットを設けたり、アルミ
テープ又は銅テープに他の材料をラミネートしてラミネ
ートテープとし、保護被覆との接着性あるいはテープと
しての強度を高める、等の応用も可能である。11 is an outer conductor made of aluminum tape or copper tape;
In the case of wisteria wrapping or vertical mounting, corrugations can be added to improve flexibility, slots can be provided as open coaxial, or laminated tape can be created by laminating aluminum tape or copper tape with other materials to improve adhesion to the protective coating. Alternatively, applications such as increasing the strength of the tape are also possible.
１２は支持線、１３は保護被覆であるが、支持線なしで
保護被覆を円形に仕上げることも可である。12 is a support wire, and 13 is a protective coating, but it is also possible to finish the protective coating in a circular shape without the support wire.
また保護被覆１３の耐熱材料としては通常耐熱性の良い
塩化ビニル、ナイロン、テフロンやマイカなどの無機絶
縁材料を使用する。As the heat-resistant material for the protective coating 13, inorganic insulating materials such as vinyl chloride, nylon, Teflon, and mica, which have good heat resistance, are usually used.
以上のような方法で製造した同軸ケーブルは消防法の規
定による摂氏４２０度３０分に十分耐えるもので、摂氏
４２０度３０分経過後藤体したが、らせん状に巻きつけ
られた細９は内部導体上に直立状態を保っており、伝送
特性においても異常は認められなかった。The coaxial cable manufactured by the method described above can withstand temperatures of 420 degrees Celsius for 30 minutes as stipulated by the Fire Service Act, and after 30 minutes of 420 degrees Celsius, the cable was damaged. It remained upright, and no abnormalities were observed in the transmission characteristics.
また更に耐熱性を向上させるため、前記の耐熱性の良好
な保護被覆を内層とし、更にその上にエチレン酢酸ビニ
ル共重合体に塩化ビニルをグラフト共重合させたグラフ
トマーを基体とした発泡性コンパウンド、塩化ビニルを
基体とした発泡性コンパウンド、エチレン酢酸ビニル共
重合体を基体とした発泡性コワパウンド等の発泡性コン
パウンドから成る耐火材料による外層を施し、内層、外
層からなる２重の保護被覆として構成することも可能で
ある。Furthermore, in order to further improve heat resistance, a foamable compound based on a graftomer obtained by graft copolymerizing vinyl chloride to ethylene vinyl acetate copolymer is used as an inner layer with the above-mentioned protective coating having good heat resistance; An outer layer made of a fireproof material made of a foamable compound such as a foamable compound based on vinyl chloride or a foamable compound based on ethylene-vinyl acetate copolymer is applied, and it is constructed as a double protective coating consisting of an inner layer and an outer layer. It is also possible.
このようにして製造したケーブルは更に耐熱性が向上し
、消防法に定める摂氏８４０度３０分後においても十分
な伝送特性機能を保有していることを確認した。It was confirmed that the cable manufactured in this way has further improved heat resistance and maintains sufficient transmission characteristics even after 30 minutes at 840 degrees Celsius as stipulated by the Fire Service Act.
以上のように本発明の製造方法に係る同軸ケーブルは耐
熱性がきわめて良好で地下街の施設に最も適したもので
ある。As described above, the coaxial cable according to the manufacturing method of the present invention has extremely good heat resistance and is most suitable for underground mall facilities.
第１図は従来の実施例、第２図は本発明による−実施例
を示すケーブルの断面図で、８は内部導体、９−１はら
せん状紐、９−２はパイプで９−１，９−２は押出一体
成形し電子線照射している。
１０は耐熱性テープ、１１は外部導体、１２は支持線、
１３は保護被覆である。
九図
オ２図FIG. 1 is a cross-sectional view of a cable showing a conventional embodiment, and FIG. 2 is a cross-sectional view of a cable showing an embodiment according to the present invention, in which 8 is an internal conductor, 9-1 is a spiral string, 9-2 is a pipe, and 9-1, 9-2 is integrally extruded and irradiated with electron beam. 10 is a heat-resistant tape, 11 is an external conductor, 12 is a support wire,
13 is a protective coating. Figure 9 Figure O 2
Claims (1)
とその周囲を被う熱可塑性樹脂パイプを同時に押出一体
成形した後、電子線照射により該らせん紐およびパイプ
を架橋し、しかる後、前記パイプの周囲に耐熱性テープ
、外部導体、保護被覆が順次施こすことを特徴とする同
軸ケーブルの製造方法。1. After simultaneously extruding and integrally molding a spiral string made of thermoplastic resin around an internal conductor and a thermoplastic resin pipe covering the periphery thereof, the spiral string and pipe are crosslinked by electron beam irradiation, and then the pipe is A method for manufacturing a coaxial cable, characterized in that a heat-resistant tape, an outer conductor, and a protective coating are sequentially applied around the periphery of the coaxial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57134199A JPS6010409B2 (en) | 1982-07-30 | 1982-07-30 | Coaxial cable manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57134199A JPS6010409B2 (en) | 1982-07-30 | 1982-07-30 | Coaxial cable manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5873915A JPS5873915A (en) | 1983-05-04 |
| JPS6010409B2 true JPS6010409B2 (en) | 1985-03-16 |
Family
ID=15122741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57134199A Expired JPS6010409B2 (en) | 1982-07-30 | 1982-07-30 | Coaxial cable manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6010409B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004013870A1 (en) * | 2002-08-06 | 2004-02-12 | Ube-Nitto Kasei Co., Ltd. | Thin-diameter coaxial cable and method of producing the same |
| JP6862672B2 (en) * | 2016-04-06 | 2021-04-21 | 日立金属株式会社 | Leaky coaxial cable |
-
1982
- 1982-07-30 JP JP57134199A patent/JPS6010409B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5873915A (en) | 1983-05-04 |
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