JPH0724897A - Method for manufacturing electrical insulator - Google Patents
Method for manufacturing electrical insulatorInfo
- Publication number
- JPH0724897A JPH0724897A JP5195462A JP19546293A JPH0724897A JP H0724897 A JPH0724897 A JP H0724897A JP 5195462 A JP5195462 A JP 5195462A JP 19546293 A JP19546293 A JP 19546293A JP H0724897 A JPH0724897 A JP H0724897A
- Authority
- JP
- Japan
- Prior art keywords
- fluororesin
- extrusion
- temperature
- fluororubber
- melting point
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000615 nonconductor Substances 0.000 title claims description 5
- 238000000034 method Methods 0.000 title abstract description 3
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 229920001973 fluoroelastomer Polymers 0.000 claims description 19
- 229920001577 copolymer Polymers 0.000 claims description 8
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract description 19
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003989 dielectric material Substances 0.000 abstract description 4
- 229910052731 fluorine Inorganic materials 0.000 abstract description 4
- 239000011737 fluorine Substances 0.000 abstract description 4
- 229920001971 elastomer Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract 3
- 229920005989 resin Polymers 0.000 abstract 3
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 2
- -1 ethylene-chlorotrifluoroethylene Chemical group 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000131 polyvinylidene Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920001780 ECTFE Polymers 0.000 description 1
- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は押出し加工性にすぐれ、
押出し成形後に成形体同士が密着しないフッ素ゴム系の
電気絶縁体の製造方法に関するものである。The present invention has excellent extrusion processability,
The present invention relates to a method for producing a fluororubber-based electrical insulator in which molded products do not adhere to each other after extrusion molding.
【０００２】[0002]
【従来の技術】フッ素ゴムはすぐれた耐熱性耐油性、耐
薬品性を活かして、ガスケット、パッキング、ホース等
の用途に使用されている。ところが、このようなフッ素
ゴムを電線や熱収縮チューブに利用する場合は、フッ素
ゴム単独では機械的強度が弱くそのままでは使用できな
いものであった。そこで、例えば特公平 2-17341号公報
にあるように、フッ素ゴムに結晶性ポリマーを添加して
フッ素ゴムの機械的特性を改善することが行われてい
る。そして結晶性ポリマーとしては、エチレン−テトラ
フルオロエチレン共重合体、テトラフルオロエチレン−
ヘキサフルオロプロピレン共重合体、ポリフッ化ビニリ
デン−フルオロオレフィン共重合体等の結晶性フッ素樹
脂が用いられる。2. Description of the Related Art Fluorine rubber is used for gaskets, packings, hoses and the like by taking advantage of its excellent heat resistance, oil resistance and chemical resistance. However, when such a fluororubber is used for an electric wire or a heat shrinkable tube, the fluororubber alone has a weak mechanical strength and cannot be used as it is. Therefore, for example, as disclosed in Japanese Patent Publication No. 2-17341, a crystalline polymer is added to fluororubber to improve the mechanical properties of fluororubber. And as the crystalline polymer, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-
A crystalline fluororesin such as a hexafluoropropylene copolymer or a polyvinylidene fluoride-fluoroolefin copolymer is used.
【０００３】[0003]
【発明が解決しようとする課題】このようなフッ素樹脂
を混合したフッ素ゴムを押出し成形する際、押出し成形
直後の成形体が密着するという問題がある。電線被覆に
このようなフッ素樹脂を混合したフッ素ゴムを使用した
場合、押出し後、ドラムに巻き取った電線の被覆同士が
密着し、密着がひどい場合には、電線を引き出すときに
被覆が破れてしまう。又製品になった後で束取りした電
線同士が密着していると、電線を使用するときに引き出
しにくく、作業性が非常に悪くなる。When extruding a fluororubber mixed with such a fluororesin, there is a problem that the compact immediately after the extrusion is adhered. When a fluororubber mixed with such a fluororesin is used for the wire coating, the coating of the wires wound on the drum after extrusion will stick to each other, and if the adhesion is severe, the coating will break when the wire is pulled out. I will end up. Further, if the electric wires bundled after being made into a product are in close contact with each other, it is difficult to pull out the electric wires when they are used, and the workability becomes extremely poor.
【０００４】このような問題に対しては、従来タルク等
の粉を打粉したり、シリコーンオイル等を表面に塗布し
たりしていたが、このような措置は電線として見栄えが
悪く、商品価値を下げるものである。In order to solve such a problem, powder of talc or the like has been hitherto dusted or silicone oil or the like has been applied to the surface. However, such a measure does not look good as an electric wire and has a commercial value. To lower.
【０００５】[0005]
【課題を解決するための手段】本発明は上述の問題点を
解消し、押出し加工性にすぐれ、押出し成形後に成形体
同士が密着しないフッ素ゴム系の電気絶縁体の製造方法
を提供するもので、その特徴は、フッ素ゴム 100重量部
に対し、粒径が 100μｍ以下のフッ素樹脂粉末10重量部
以上、 100重量部未満をフッ素樹脂の融点以下の温度で
混合し、フッ素樹脂の融点以上の温度で押出し成形する
ことにある。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems and provides a method for producing a fluororubber-based electric insulator which has excellent extrusion processability and does not adhere to each other after extrusion molding. The characteristic is that 100 parts by weight of fluororubber are mixed with 10 parts by weight or more and less than 100 parts by weight of fluororesin powder having a particle size of 100 μm or less at a temperature not higher than the melting point of the fluororesin, and a temperature not lower than the melting point of the fluororesin. It is in extrusion molding.
【０００６】[0006]
【作用】フッ素ゴムとフッ素樹脂を混合する場合、通常
はフッ素樹脂の融点以上の温度で行うが、本発明ではフ
ッ素樹脂の融点以下の温度で行い、フッ素樹脂も粒径が
100μｍ以下の粉末を用いる。このような方法で混合し
たものをフッ素樹脂の融点以上の温度で押出し成形を行
うと、不思議なことに押出し成形後の被覆同士の密着が
なく、押出し加工性も非常に良好に押出し成形ができる
ことを見出した。低温での混合がフッ素ゴムの粘着性を
低下させているからかもしれないが、理由は明らかでは
ない。When the fluororubber and the fluororesin are mixed, the temperature is usually higher than the melting point of the fluororesin, but in the present invention, the temperature is lower than the melting point of the fluororesin.
Use powder of 100 μm or less. When the mixture mixed by such a method is extrusion-molded at a temperature higher than the melting point of the fluororesin, it is mysterious that there is no adhesion between the coatings after the extrusion-molding, and the extrusion-processability is very good. Found. It may be because the mixing at low temperature reduces the tackiness of the fluororubber, but the reason is not clear.
【０００７】使用するフッ素ゴムとしてはフッ化ビニリ
デン−六フッ化プロピレン共重合体、フッ化ビニリデン
−六フッ化プロピレン−四フッ化エチレン三元共重合
体、四フッ化エチレン−プロピレン共重合体等が用いら
れる。As the fluororubber to be used, vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer, tetrafluoroethylene-propylene copolymer, etc. Is used.
【０００８】フッ素樹脂としては、ポリフッ化ビニリデ
ン、ポリフッ化ビニリデン−フルオロオレフィン共重合
体、エチレン−四フッ化エチレン共重合体、四フッ化エ
チレン−六フッ化プロピレン共重合体、エチレン−クロ
ロトリフッ化エチレン共重合体、四フッ化エチレン−パ
ーフルオロアルキルビニルエ−テル共重合体、ポリ四フ
ッ化エチレン等が用いられる。Examples of the fluororesin include polyvinylidene fluoride, polyvinylidene fluoride-fluoroolefin copolymer, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, ethylene-chlorotrifluoroethylene. A copolymer, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, a polytetrafluoroethylene or the like is used.
【０００９】フッ素樹脂の粒径は 100μｍ以下である必
要があり、これより大きいと成形体の外観が悪くなる。
又フッ素樹脂の添加量は、フッ素ゴム 100重量部に対し
て10重量部以上、 100重量部未満である必要がある。10
重部未満では成形体の密着が防止できず、 100重量部以
上では低温特性が悪くなるため電気絶縁体として使用で
きなくなる。成形体の押出し温度は、フッ素樹脂の融点
以上である必要がある。フッ素樹脂の融点以下の温度で
は良好な外観の押出しができない。It is necessary that the particle size of the fluororesin is 100 μm or less, and if it is larger than this, the appearance of the molded product is deteriorated.
Further, the addition amount of the fluororesin must be 10 parts by weight or more and less than 100 parts by weight with respect to 100 parts by weight of the fluororubber. Ten
If it is less than 100 parts by weight, the adhesion of the molded product cannot be prevented, and if it is more than 100 parts by weight, the low temperature characteristics deteriorate, and it cannot be used as an electrical insulator. The extrusion temperature of the molded body needs to be equal to or higher than the melting point of the fluororesin. Extrusion with a good appearance cannot be performed at a temperature below the melting point of the fluororesin.
【００１０】なお、本発明のフッ素ゴム成形体には、通
常フッ素ゴムに加えられる無機充填剤や配合剤を添加す
ることができる。例えば、タルク、クレー、炭酸カルシ
ウム、シリカ、酸化マグネシウム、酸化亜鉛、酸化鉛、
カーボン、架橋剤、架橋促進剤等である。The fluororubber molding of the present invention may contain inorganic fillers and compounding agents which are usually added to fluororubbers. For example, talc, clay, calcium carbonate, silica, magnesium oxide, zinc oxide, lead oxide,
Examples include carbon, a cross-linking agent, and a cross-linking accelerator.
【００１１】[0011]
実施例１〜５：表１に示したフッ素ゴム組成物を60℃で
15分間ロール混練し、0.8mmφの錫メッキ軟銅線上に厚
さ 0.5mmで押出し被覆した。押出し成形後の被覆電線を
ドラムに巻き取り、電線被覆の密着性を評価した。押出
し後の被覆電線を２MeV の電子線加速器で10Mrad電子線
を照射した。この電線を低温槽に入れて電線の外径と等
しい径をもつマンドレルに巻付け、クラックが発生する
温度を調べた。これらの結果実施例１〜５はいずれも、
外観良好に押出しができ、密着もなかった。又低温特性
も良好であった。Examples 1 to 5: The fluororubber composition shown in Table 1 was prepared at 60 ° C.
The mixture was roll-kneaded for 15 minutes, and extrusion-coated with a thickness of 0.5 mm on a 0.8 mmφ tin-plated annealed copper wire. The coated electric wire after extrusion molding was wound on a drum and the adhesion of the electric wire coating was evaluated. The extruded coated electric wire was irradiated with 10 Mrad electron beam by a 2 MeV electron beam accelerator. This electric wire was placed in a low temperature tank and wound around a mandrel having a diameter equal to the outer diameter of the electric wire, and the temperature at which cracks occurred was examined. All of these results Examples 1 to 5
The appearance was good and extrusion was possible and there was no adhesion. The low temperature characteristics were also good.
【００１２】比較例１〜４：表１に示したフッ素ゴム組
成物を60℃あるいは 160℃で混練し、実施例と同様に被
覆電線を作製し評価した。比較例１はフッ素樹脂の融点
以上の温度で混練したものであり、電線被覆同士が密着
し、外観も低温で混練した実施例３に比べて悪かった。
比較例２はフッ素樹脂の粒径が 500μｍのものを使用し
たものであり、押出した電線被覆外観が非常に悪かっ
た。比較例３はフッ素樹脂を 100重量部以上添加した場
合で低温特性が悪かった。又比較例４のように押出し温
度がフッ素樹脂の融点以下では押出し外観が悪かった。Comparative Examples 1 to 4 The fluororubber compositions shown in Table 1 were kneaded at 60 ° C. or 160 ° C., and coated electric wires were prepared and evaluated in the same manner as in Examples. Comparative Example 1 was kneaded at a temperature equal to or higher than the melting point of the fluororesin, and the electric wire coatings were in close contact with each other, and the appearance was worse than that of Example 3 in which kneading was performed at a low temperature.
In Comparative Example 2, a fluororesin having a particle diameter of 500 μm was used, and the appearance of the extruded electric wire coating was very poor. Comparative Example 3 was poor in low-temperature characteristics when 100 parts by weight or more of the fluororesin was added. Further, as in Comparative Example 4, when the extrusion temperature was lower than the melting point of the fluororesin, the extrusion appearance was poor.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【発明の効果】以上説明したように、本発明の電気絶縁
体の製造方法によれば、押出し成形後の成形体同士の密
着がなく、押出し外観が良好なフッ素ゴム系の電気絶縁
体を得ることができる。As described above, according to the method for producing an electric insulator of the present invention, a fluororubber-based electric insulator having a good extruded appearance without adhesion between the extruded molded articles is obtained. be able to.
Claims (2)
μｍ以下のフッ素樹脂粉末10重量部以上、 100重量部未
満をフッ素樹脂の融点以下の温度で混合し、フッ素樹脂
の融点以上の温度で押出し成形することを特徴とする電
気絶縁体の製造方法。1. A particle size of 100 per 100 parts by weight of fluororubber.
A method for producing an electrical insulator, which comprises mixing 10 parts by weight or more and less than 100 parts by weight of a fluororesin powder having a size of μm or less at a temperature not higher than the melting point of the fluororesin and extruding at a temperature not lower than the melting point of the fluororesin.
フッ化ビニリデン−フルオロオレフィン共重合体である
ことを特徴とする請求項１記載の電気絶縁体の製造方
法。2. The method for producing an electrical insulator according to claim 1, wherein the fluororesin is polyvinylidene fluoride or a vinylidene fluoride-fluoroolefin copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195462A JPH0724897A (en) | 1993-07-12 | 1993-07-12 | Method for manufacturing electrical insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195462A JPH0724897A (en) | 1993-07-12 | 1993-07-12 | Method for manufacturing electrical insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0724897A true JPH0724897A (en) | 1995-01-27 |
Family
ID=16341483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5195462A Pending JPH0724897A (en) | 1993-07-12 | 1993-07-12 | Method for manufacturing electrical insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724897A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2820140A1 (en) * | 2001-01-26 | 2002-08-02 | Solvay | THERMOPLASTIC HALOGEN POLYMER COMPOSITIONS, PROCESS FOR THEIR PREPARATION AND USE THEREOF |
-
1993
- 1993-07-12 JP JP5195462A patent/JPH0724897A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2820140A1 (en) * | 2001-01-26 | 2002-08-02 | Solvay | THERMOPLASTIC HALOGEN POLYMER COMPOSITIONS, PROCESS FOR THEIR PREPARATION AND USE THEREOF |
| WO2002059190A3 (en) * | 2001-01-26 | 2004-01-29 | Solvay | Thermoplastic halogenated polymer compositions, method for preparing same and use thereof |
| US6979715B2 (en) | 2001-01-26 | 2005-12-27 | Solvay (Societe Anonyme) | Thermoplastic halogenated polymer compositions, method for preparing same and use thereof |
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