JP2003308747A - Silicone oil for heating medium for bridging cv cable - Google Patents
Silicone oil for heating medium for bridging cv cableInfo
- Publication number
- JP2003308747A JP2003308747A JP2002113424A JP2002113424A JP2003308747A JP 2003308747 A JP2003308747 A JP 2003308747A JP 2002113424 A JP2002113424 A JP 2002113424A JP 2002113424 A JP2002113424 A JP 2002113424A JP 2003308747 A JP2003308747 A JP 2003308747A
- Authority
- JP
- Japan
- Prior art keywords
- silicone oil
- molecular weight
- cable
- kinematic viscosity
- heating medium
- 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.)
- Pending
Links
Landscapes
- Silicon Polymers (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＣＶケーブルの架
橋加熱媒体用シリコーン油（シリコン油）に関する。TECHNICAL FIELD The present invention relates to a silicone oil (silicon oil) for a cross-linking heating medium of a CV cable.
【０００２】[0002]
【従来の技術】一般にＣＶケーブル（架橋ポリエチレン
電力ケーブル）の製造には、導体周面に内部半導電層、
絶縁体、外部半導電層（絶縁体遮蔽）を一つのクロスヘ
ッドで同時に導体上に押出して被覆する三層同時押し出
し成形方法（コモン押し出し方法ともいう）が採用され
ている。2. Description of the Related Art Generally, when manufacturing a CV cable (cross-linked polyethylene power cable), an inner semi-conductive layer is provided on the peripheral surface of the conductor.
A three-layer simultaneous extrusion method (also referred to as a common extrusion method) in which an insulator and an outer semiconductive layer (insulator shield) are simultaneously extruded and covered on a conductor by one crosshead is adopted.
【０００３】架橋剤が添加されたポリエチレンは、導体
上に被覆された後、さらに架橋し、冷却する加工が必要
になる。これは、ポリエチレンが化学的に架橋し、３次
元構造を作り、熱安定性を得るためである。そして、架
橋加熱の熱媒体として高温のシリコーン油を循環して使
用する。Polyethylene to which a cross-linking agent has been added requires a process of further cross-linking and cooling after being coated on a conductor. This is because polyethylene is chemically crosslinked to form a three-dimensional structure and obtains thermal stability. Then, high-temperature silicone oil is circulated and used as a heat medium for crosslinking heating.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、熱媒体
としてのシリコーン油は、熱媒体として繰り返し使用さ
れていると、熱変質して性能とくに動粘性が増加するの
で、一定期間の使用すると交換する必要が生じるが、交
換作業の間は操業を停止する必要があり、また高価なシ
リコーン油を大量に交換する必要が生じるなどの問題点
があった。これに対して、耐熱性の高い分子構造の特殊
なシリコーン油を使用するのでは、高コストになってし
まう。However, if the silicone oil as the heat medium is repeatedly used as the heat medium, the quality of the silicone oil is deteriorated and the performance, especially the kinematic viscosity, increases. Therefore, it is necessary to replace the silicone oil after a certain period of use. However, there is a problem in that the operation must be stopped during the replacement work, and a large amount of expensive silicone oil needs to be replaced. On the other hand, using a special silicone oil having a high heat resistance and a molecular structure results in high cost.
【０００５】本発明は、上記従来技術の問題点に着目し
てなされたもので、耐熱性の高いシリコーン油を通常の
分子構造で得ることができ、シリコーン油の交換を少な
くできると共に、コストを低減できるＣＶケーブルの架
橋加熱媒体用シリコーン油を提供することを目的とす
る。The present invention has been made by paying attention to the above-mentioned problems of the prior art, and it is possible to obtain a silicone oil having a high heat resistance with an ordinary molecular structure, which can reduce the exchange of the silicone oil and reduce the cost. An object of the present invention is to provide a silicone oil for a cross-linking heating medium of a CV cable, which can be reduced.
【０００６】[0006]
【課題を解決するための手段】本発明は、ＣＶケーブル
の絶縁体樹脂を架橋する際に使用する架橋熱媒体として
のシリコーン油であって、分子構造はポリメチルフェニ
ルシロキサンであり、高分子量成分が低分子量成分より
も多く含まれる分子量分布を有することを特徴とするＣ
Ｖケーブルの架橋加熱媒体用シリコーン油である。本発
明においては、シリコーン油は、重量平均分子量Ｍｗが
３５００以下、また、分散度が２．５以下であり、さら
に、動粘度が２５℃測定で１５００ｃｓ以下であること
が好適である。The present invention is a silicone oil as a cross-linking heat medium used when cross-linking an insulating resin of a CV cable, the molecular structure of which is polymethylphenyl siloxane, and a high molecular weight component. C has a molecular weight distribution in which it is contained in a larger amount than the low molecular weight component.
It is a silicone oil for cross-linking heating medium of V cable. In the present invention, the silicone oil preferably has a weight average molecular weight Mw of 3500 or less, a dispersity of 2.5 or less, and a kinematic viscosity of 1500 cs or less measured at 25 ° C.
【０００７】上記構成を有する本発明によれば、シリコ
ーン油の分子構造は、一般的なポリメチルフェニルシロ
キサンであるが、高分子量成分が低分子量成分より多く
含まれるので、耐熱性が高く増粘の経時変化が少なくな
り、シリコーン油の交換量が少なくて済む。したがっ
て、コストを低減できる。また、耐熱性が高いため、使
用温度を上げることができ、ＣＶケーブル製造能力を上
げることも可能になる。According to the present invention having the above-mentioned constitution, the molecular structure of silicone oil is general polymethylphenylsiloxane, but since the high molecular weight component is contained more than the low molecular weight component, it has high heat resistance and viscosity increase. Changes over time and the amount of silicone oil exchanged is small. Therefore, the cost can be reduced. Further, since the heat resistance is high, it is possible to raise the operating temperature and the CV cable manufacturing capacity.
【０００８】[0008]
【発明の実施の形態】以下、図に基づき本発明の実施の
形態を詳細に説明する。図１、図２は本発明の実施形態
に適用するＣＶケーブルの架橋加熱媒体用シリコーン油
の説明図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 are explanatory views of a silicone oil for a cross-linking heating medium of a CV cable applied to an embodiment of the present invention.
【０００９】本発明例と比較例のシリコーン油の各試料
の比較分析を行った。試料は、いずれもポリメチルフェ
ニルシロキサン１００％のものであった。Comparative analysis was performed on each sample of the silicone oils of the present invention example and the comparative example. All samples were 100% polymethylphenylsiloxane.
【００１０】（分析方法）
１．ＧＰＣ測定
資料をトルエンで溶解してＧＰＣ測定を行った。以下に
測定条件を示す。
使用カラム：Shodex K806M・K802
溶媒：トルエン
サンプル濃度：０．２ｗｔ％
流量：１．０ｍｌ/ｍｉｎ
注入量：２００ｍｌ
極性：ＰＯＳ(Analysis method) 1. GPC measurement was performed by dissolving the GPC measurement data in toluene. The measurement conditions are shown below. Column used: Shodex K806M / K802 Solvent: Toluene Sample concentration: 0.2 wt% Flow rate: 1.0 ml / min Injection volume: 200 ml Polarity: POS
【００１１】２．ＮＭＲ測定
資料を重クロロホルムに溶解し、核磁気共鳴分析（ＮＭ
Ｒ）で１Ｈについて測定を行った。2. Dissolve NMR measurement data in deuterated chloroform and perform nuclear magnetic resonance analysis (NM
R) was measured for 1H.
【００１２】（測定結果）ＧＰＣチャートを図１に示
す。比較例と本発明例は、共に２成分のピークが検出さ
れた。また、本発明例と比較例の重量平均分子量Ｍｗお
よび分散度を表１に示す。比較例は、本発明例と比較し
て全体の分散度が高くさらに全体の重量平均分子量も若
干高めである。(Measurement Results) A GPC chart is shown in FIG. In both the comparative example and the example of the present invention, two component peaks were detected. In addition, Table 1 shows the weight average molecular weight Mw and the dispersity of the inventive example and the comparative example. In the comparative example, the dispersity of the whole is high and the weight average molecular weight of the whole is slightly higher than that of the examples of the present invention.
【００１３】[0013]
【表１】 [Table 1]
【００１４】また、ＮＭＲチャートから積分強度からフ
ェニル基量を算出すると、比較例が２７モル％、本発明
例２８モル％であることから含有量はほとんど同じであ
る。Further, when the amount of phenyl groups was calculated from the integrated intensity from the NMR chart, it was 27 mol% in the comparative example and 28 mol% in the example of the present invention, so the contents were almost the same.
【００１５】耐熱性の評価を図２に示す。図２から当初
比較例は初期の動粘性が低いが日数と共に徐々に高くな
っていくが、本発明例は当初動粘度が高いが日数と共に
変化が少なく、７日過ぎた当たりで比較例の動粘度が本
発明例の動粘度を超えて高くなっている。比較例はそれ
だけ変質して動粘度が高くなったものである。このこと
から、本発明例が変質が少なく耐熱性の高いことが分
る。The evaluation of heat resistance is shown in FIG. From FIG. 2, the initial comparative example has a low initial kinematic viscosity, but gradually increases with the number of days, but the inventive example has a high initial kinematic viscosity but changes little with the number of days. The viscosity is higher than the kinematic viscosity of the examples of the present invention. In the comparative example, the kinematic viscosity was increased due to the deterioration. From this, it can be seen that the examples of the present invention have little deterioration and high heat resistance.
【００１６】[0016]
【発明の効果】以上説明したとおり、この発明によれ
ば、耐熱性の高いシリコーン油を通常の分子構造で得る
ことができ、シリコーン油の交換を少なくできると共
に、コストを低減できる。As described above, according to the present invention, it is possible to obtain a highly heat-resistant silicone oil having a normal molecular structure, and it is possible to reduce the exchange of silicone oil and reduce the cost.
【図１】本発明の実施形態に適用するＣＶケーブルの架
橋加熱媒体用シリコーン油を説明図する、（ａ）の比較
例と（ｂ）の本発明例のＧＰＣチャートである。FIG. 1 is a GPC chart of a comparative example of (a) and an example of the present invention of (b) illustrating a silicone oil for a cross-linking heating medium of a CV cable applied to an embodiment of the present invention.
【図２】本実施形態と比較例の耐熱性の評価を比較して
示す説明図である。FIG. 2 is an explanatory diagram showing heat resistance evaluations of the present embodiment and a comparative example in comparison.
フロントページの続き (72)発明者 伊藤 雅彦 東京都江東区木場一丁目５番１号 株式会 社フジクラ内 Ｆターム(参考） 4J035 BA02 CA111 CA301 EA01 EB10 LA02 LB20 5G325 GA04 Continued front page (72) Inventor Masahiko Ito 1-5-1 Kiba Stock Market, Koto-ku, Tokyo Inside Fujikura F-term (reference) 4J035 BA02 CA111 CA301 EA01 EB10 LA02 LB20 5G325 GA04
Claims (2)
に使用する架橋熱媒体としてのシリコーン油であって、
分子構造はポリメチルフェニルシロキサンであり、高分
子量成分が低分子量成分よりも多く含まれる分子量分布
を有することを特徴とするＣＶケーブルの架橋加熱媒体
用シリコーン油。1. A silicone oil as a cross-linking heat medium used when cross-linking an insulating resin of a CV cable,
A silicone oil for a cross-linking heating medium of a CV cable, which has a molecular structure of polymethylphenyl siloxane and has a molecular weight distribution in which a high molecular weight component is contained more than a low molecular weight component.
３５００以下であり分散度が２．５以下であり、動粘度
が２５℃測定で１５００ｃｓ以下であることを特徴とす
る請求項１に記載のＣＶケーブルの架橋加熱媒体用シリ
コーン油。2. The silicone oil has a weight average molecular weight Mw of 3500 or less, a polydispersity of 2.5 or less, and a kinematic viscosity of 1500 cs or less at 25 ° C. measurement. Silicone oil for CV cable cross-linking heating medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002113424A JP2003308747A (en) | 2002-04-16 | 2002-04-16 | Silicone oil for heating medium for bridging cv cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002113424A JP2003308747A (en) | 2002-04-16 | 2002-04-16 | Silicone oil for heating medium for bridging cv cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003308747A true JP2003308747A (en) | 2003-10-31 |
Family
ID=29395615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002113424A Pending JP2003308747A (en) | 2002-04-16 | 2002-04-16 | Silicone oil for heating medium for bridging cv cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003308747A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789012A (en) * | 2016-05-27 | 2019-05-21 | 雷恩斯根公司 | The crystalline lens oil with Narrow Molecular Weight Distribution for intraocular lens body device |
-
2002
- 2002-04-16 JP JP2002113424A patent/JP2003308747A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789012A (en) * | 2016-05-27 | 2019-05-21 | 雷恩斯根公司 | The crystalline lens oil with Narrow Molecular Weight Distribution for intraocular lens body device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20041208 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20071030 |
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| A02 | Decision of refusal |
Effective date: 20080318 Free format text: JAPANESE INTERMEDIATE CODE: A02 |