JP2556857B2 - Method for producing cross-linked expanded polyethylene insulated wire - Google Patents
Method for producing cross-linked expanded polyethylene insulated wireInfo
- Publication number
- JP2556857B2 JP2556857B2 JP62138583A JP13858387A JP2556857B2 JP 2556857 B2 JP2556857 B2 JP 2556857B2 JP 62138583 A JP62138583 A JP 62138583A JP 13858387 A JP13858387 A JP 13858387A JP 2556857 B2 JP2556857 B2 JP 2556857B2
- Authority
- JP
- Japan
- Prior art keywords
- insulated wire
- insulator
- polyethylene insulated
- expanded polyethylene
- liquid substance
- 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 - Lifetime
Links
- 239000004698 Polyethylene Substances 0.000 title claims description 23
- -1 polyethylene Polymers 0.000 title claims description 23
- 229920000573 polyethylene Polymers 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000012212 insulator Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 238000010894 electron beam technology Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 5
- 238000004132 cross linking Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 5
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【発明の詳細な説明】 （発明の技術分野） 本発明は、架橋発泡ポリエチレン絶縁電線の製造方法
に関する。TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for producing a crosslinked expanded polyethylene insulated wire.
（発明の技術的背景とその問題点） 従来から発泡ポリエチレン絶縁電線を製造するには、
導体上に発泡剤を含有する低密度ポリエチレン組成物
は、押出機によって被覆し発泡させた後、電子線を照射
してポリエチレンを架橋する方法が採られている。(Technical background of the invention and its problems) Conventionally, to manufacture a foamed polyethylene insulated wire,
A low-density polyethylene composition containing a foaming agent on a conductor is coated with an extruder to be foamed, and then irradiated with an electron beam to crosslink the polyethylene.
しかしながら、このような方法で製造された発泡ポリ
エチレン絶縁電線においては、発泡ポリエチレン絶縁体
の機械的強度が低く、外圧が加わったときに変形しやす
い。特に電線を対撚りした場合には、絶縁体が潰れやす
いという問題があった。However, in the foamed polyethylene insulated wire manufactured by such a method, the foamed polyethylene insulator has low mechanical strength and is easily deformed when an external pressure is applied. In particular, when the electric wires are twisted in pairs, there is a problem that the insulator is easily crushed.
（発明の目的） 本発明はこのような問題を解決するためになされたも
ので、絶縁体が変形しにくい架橋発泡ポリエチレン絶縁
電線を製造する方法を提供することを目的とする。(Object of the Invention) The present invention has been made to solve such a problem, and an object of the present invention is to provide a method for producing a crosslinked expanded polyethylene insulated wire in which an insulator is less likely to be deformed.
（発明の概要） 本発明の架橋発泡ポリエチレン絶縁電線の製造方法
は、導体上に発泡ポリエチレンからなる絶縁体を被覆し
た後、その上に多官能性液状物質を塗布し、次いで電子
線を照射して、前記絶縁体を架橋すると同時に、多官能
性液状物質を架橋硬化させることを特徴としている。(Summary of the Invention) A method for producing a crosslinked foamed polyethylene insulated wire according to the present invention comprises: covering a conductor with an insulator made of foamed polyethylene, applying a polyfunctional liquid substance thereon, and then irradiating with an electron beam. The polyfunctional liquid substance is crosslinked and cured at the same time when the insulator is crosslinked.
本発明においては、図面に示すように、常法によって
導体上に発泡ポリエチレン絶縁体を押出被覆されたコア
１は、適量の多官能性液状物質２を含浸させた多孔体３
で構成された塗布装置を通り、絶縁体表面に前記液状物
質２の塗膜が形成された後、電子線照射装置４を通り、
絶縁体および塗膜が架橋硬化される。In the present invention, as shown in the drawings, a core 1 obtained by extrusion-coating a foamed polyethylene insulator on a conductor by a conventional method comprises a porous body 3 impregnated with an appropriate amount of a polyfunctional liquid substance 2.
After the coating film of the liquid substance 2 is formed on the surface of the insulator through the coating device configured by
The insulator and coating are crosslinked and cured.
なお図中符号５および６は、それぞれ供給装置および
巻取ドラムを示す。Note that reference numerals 5 and 6 in the figure denote a supply device and a winding drum, respectively.
ここで絶縁体表面に塗布する多官能性液状物質として
は、多官性アクリル系モノマー（TMPT等）のような多官
能性のアクリル系モノマーやオリゴマー、或いは液状の
不飽和ポリエステル等を使用することができる。Here, as the polyfunctional liquid substance applied to the surface of the insulator, a polyfunctional acrylic monomer or oligomer such as a polyfunctional acrylic monomer (TMPT) or a liquid unsaturated polyester should be used. You can
また電子線の照射線量は、10〜40Mrad、より好ましく
は25〜35Mradとする。The irradiation dose of the electron beam is 10 to 40 Mrad, more preferably 25 to 35 Mrad.
照射線量が10Mrad未満では前記液状物質および発泡ポ
リエチレン絶縁体が充分に架橋硬化せず、反応に40Mrad
を越えると液状物質が架橋しすぎてもろくなり、好まし
くない。When the irradiation dose is less than 10Mrad, the liquid substance and the foamed polyethylene insulation do not sufficiently crosslink and cure, and 40Mrad for the reaction.
When it exceeds, the liquid substance becomes brittle even if it is cross-linked too much, which is not preferable.
本発明においては、上記範囲の電子線の照射によっ
て、ポリエチレンが架橋されると同時に、その上に塗布
された多官能性液状物質が架橋硬化される。従って、絶
縁体の最外側が硬い薄層で覆われ、潰れ等の変形の生じ
にくい架橋発泡ポリエチレン絶縁電線を得ることができ
る。In the present invention, the irradiation of the electron beam in the above range cross-links the polyethylene and simultaneously cross-links and cures the polyfunctional liquid substance applied thereon. Therefore, the outermost side of the insulator is covered with a hard thin layer, and it is possible to obtain a crosslinked foamed polyethylene insulated wire in which deformation such as crushing is unlikely to occur.
（発明の実施例） 以下、本発明の実施例について記載する。(Examples of the Invention) Hereinafter, examples of the present invention will be described.
実施例 30mm径押出機を用いて、直径0.36mmの軟銅線上にポリ
パン4213（大日本インキ（株）社製、発泡剤入り低密度
ポリエチレン組成物の商品名）を、線速100m/分の条件
で押出被覆した後、ポリエチレンを発泡させ、直径1.10
mm発泡率50％の発泡ポリエチレン絶縁コアを製造した。
次いでこのコア表面にTMPTを塗布した後、30Mradの電子
線を照射し、発泡ポリエチレンを架橋すると同時にTMPT
を架橋硬化させた。Example 30 Using a 30 mm diameter extruder, polypan 4213 (manufactured by Dainippon Ink and Chemicals, Inc., a trade name of a low density polyethylene composition containing a foaming agent) was applied on a 0.36 mm diameter annealed copper wire at a linear velocity of 100 m / min After extrusion coating with polyethylene, foam polyethylene to a diameter of 1.10
mm Foamed polyethylene insulation core with 50% foaming rate was produced.
Then, after applying TMPT to the surface of this core, it is irradiated with an electron beam of 30 Mrad to crosslink the foamed polyethylene and at the same time TMPT.
Was cross-linked and cured.
こうして得られた電線を、常法により加圧子（直径5m
m）にはさみ700gの荷重をかけたところ、絶縁体はほと
んどつぶれず、全体の直径は1.03mmとわずかに減少した
だけであった。The electric wire thus obtained was pressed by a conventional method (diameter 5 m
When 700 g of scissors was applied to the m), the insulator hardly collapsed and the overall diameter was slightly reduced to 1.03 mm.
また比較のために、発泡ポリエチレン絶縁コアをその
まま荷重700gの加圧子にはさんだところ、絶縁体は大き
く潰れ、全体の直径は1.10mmから0.90mmに著るしく減少
した。For comparison, when the expanded polyethylene insulation core was directly inserted into a pressurizer with a load of 700 g, the insulation collapsed significantly and the overall diameter was significantly reduced from 1.10 mm to 0.90 mm.
（発明の効果） 以上の説明から明らかなように、本発明の方法によれ
ば、電子照射線により多官能性物質の塗布層が架橋し、
発泡ポリエチレン絶縁体の表面に硬い薄層が形成される
ので、絶縁体の変形が生じにくい架橋発泡ポリエチレン
絶縁電線が製造される。(Effect of the invention) As is clear from the above description, according to the method of the present invention, the coating layer of the polyfunctional substance is crosslinked by the electron irradiation beam,
Since the hard thin layer is formed on the surface of the foamed polyethylene insulator, the crosslinked foamed polyethylene insulated wire in which the insulator is less likely to be deformed is manufactured.
図面は本発明の方法を説明するための模式図である。 １……発泡ポリエチレン絶縁コア ２……多官能性液状物質 ４……電子線照射装置 The drawings are schematic diagrams for explaining the method of the present invention. 1 ... Foamed polyethylene insulation core 2 ... Polyfunctional liquid substance 4 ... Electron beam irradiation device
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−10810（ＪＰ，Ａ) 特開 昭58−80212（ＪＰ，Ａ) 特開 昭56−118215（ＪＰ，Ａ) 特開 昭52−100570（ＪＰ，Ａ) 特開 昭58−34513（ＪＰ，Ａ) 特開 昭56−162414（ＪＰ，Ａ) 特開 昭58−1728（ＪＰ，Ａ) 特開 昭59−62642（ＪＰ，Ａ) ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP 62-10810 (JP, A) JP 58-80212 (JP, A) JP 56-118215 (JP, A) JP 52- 100570 (JP, A) JP 58-34513 (JP, A) JP 56-162414 (JP, A) JP 58-1728 (JP, A) JP 59-62642 (JP, A)
Claims (1)
を被覆した後、その上に多官能性液状物質を塗布し、次
いで電子線を照射して、前記絶縁体を架橋すると同時
に、多官能性液状物質を架橋硬化させることを特徴とす
る架橋発泡ポリエチレン絶縁電線の製造方法。1. A conductor is coated with an insulator made of expanded polyethylene, a polyfunctional liquid substance is applied onto the conductor, and then an electron beam is irradiated to crosslink the insulator, and at the same time, the polyfunctionality is imparted. A method for producing a crosslinked foamed polyethylene insulated wire, which comprises crosslinking and hardening a liquid substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138583A JP2556857B2 (en) | 1987-06-02 | 1987-06-02 | Method for producing cross-linked expanded polyethylene insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138583A JP2556857B2 (en) | 1987-06-02 | 1987-06-02 | Method for producing cross-linked expanded polyethylene insulated wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63304532A JPS63304532A (en) | 1988-12-12 |
| JP2556857B2 true JP2556857B2 (en) | 1996-11-27 |
Family
ID=15225512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62138583A Expired - Lifetime JP2556857B2 (en) | 1987-06-02 | 1987-06-02 | Method for producing cross-linked expanded polyethylene insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556857B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962642A (en) * | 1982-10-02 | 1984-04-10 | Sekisui Plastics Co Ltd | Preparation of crosslinked resin foam |
-
1987
- 1987-06-02 JP JP62138583A patent/JP2556857B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63304532A (en) | 1988-12-12 |
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