JPS63221513A - Manufacture of foam insulated wire - Google Patents
Manufacture of foam insulated wireInfo
- Publication number
- JPS63221513A JPS63221513A JP5369987A JP5369987A JPS63221513A JP S63221513 A JPS63221513 A JP S63221513A JP 5369987 A JP5369987 A JP 5369987A JP 5369987 A JP5369987 A JP 5369987A JP S63221513 A JPS63221513 A JP S63221513A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- acid
- insulated wire
- azodicarbonamide
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000006260 foam Substances 0.000 title description 16
- 239000012212 insulator Substances 0.000 claims description 23
- 239000004156 Azodicarbonamide Substances 0.000 claims description 21
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 21
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 21
- 239000004020 conductor Substances 0.000 claims description 18
- 238000000354 decomposition reaction Methods 0.000 claims description 11
- 239000000344 soap Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 230000005865 ionizing radiation Effects 0.000 claims description 3
- 239000011342 resin composition Substances 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims 1
- 238000007765 extrusion coating Methods 0.000 claims 1
- 238000005187 foaming Methods 0.000 description 15
- 239000002253 acid Substances 0.000 description 12
- 229920001684 low density polyethylene Polymers 0.000 description 9
- 239000004702 low-density polyethylene Substances 0.000 description 9
- 229920000098 polyolefin Polymers 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000004604 Blowing Agent Substances 0.000 description 3
- UQLDLKMNUJERMK-UHFFFAOYSA-L di(octadecanoyloxy)lead Chemical compound [Pb+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O UQLDLKMNUJERMK-UHFFFAOYSA-L 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- YWWVWXASSLXJHU-AATRIKPKSA-N (9E)-tetradecenoic acid Chemical compound CCCC\C=C\CCCCCCCC(O)=O YWWVWXASSLXJHU-AATRIKPKSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- YZXBAPSDXZZRGB-DOFZRALJSA-N arachidonic acid Chemical compound CCCCC\C=C/C\C=C/C\C=C/C\C=C/CCCC(O)=O YZXBAPSDXZZRGB-DOFZRALJSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229940066675 ricinoleate Drugs 0.000 description 2
- WBHHMMIMDMUBKC-QJWNTBNXSA-M ricinoleate Chemical compound CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O WBHHMMIMDMUBKC-QJWNTBNXSA-M 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N 2-Ethylhexanoic acid Chemical compound CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
- KIHBGTRZFAVZRV-UHFFFAOYSA-N 2-Hydroxyoctadecanoic acid Natural products CCCCCCCCCCCCCCCCC(O)C(O)=O KIHBGTRZFAVZRV-UHFFFAOYSA-N 0.000 description 1
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- YWWVWXASSLXJHU-UHFFFAOYSA-N 9E-tetradecenoic acid Natural products CCCCC=CCCCCCCCC(O)=O YWWVWXASSLXJHU-UHFFFAOYSA-N 0.000 description 1
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 description 1
- 241000283153 Cetacea Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 description 1
- SHBUUTHKGIVMJT-UHFFFAOYSA-N Hydroxystearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OO SHBUUTHKGIVMJT-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 241001125046 Sardina pilchardus Species 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000004708 Very-low-density polyethylene Substances 0.000 description 1
- JIWBIWFOSCKQMA-LTKCOYKYSA-N all-cis-octadeca-6,9,12,15-tetraenoic acid Chemical compound CC\C=C/C\C=C/C\C=C/C\C=C/CCCCC(O)=O JIWBIWFOSCKQMA-LTKCOYKYSA-N 0.000 description 1
- 229940114079 arachidonic acid Drugs 0.000 description 1
- 235000021342 arachidonic acid Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 1
- LQJBNNIYVWPHFW-QXMHVHEDSA-N gadoleic acid Chemical compound CCCCCCCCCC\C=C/CCCCCCCC(O)=O LQJBNNIYVWPHFW-QXMHVHEDSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229940072106 hydroxystearate Drugs 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 229940070765 laurate Drugs 0.000 description 1
- GIWKOZXJDKMGQC-UHFFFAOYSA-L lead(2+);naphthalene-2-carboxylate Chemical compound [Pb+2].C1=CC=CC2=CC(C(=O)[O-])=CC=C21.C1=CC=CC2=CC(C(=O)[O-])=CC=C21 GIWKOZXJDKMGQC-UHFFFAOYSA-L 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- SECPZKHBENQXJG-FPLPWBNLSA-N palmitoleic acid Chemical compound CCCCCC\C=C/CCCCCCCC(O)=O SECPZKHBENQXJG-FPLPWBNLSA-N 0.000 description 1
- CNVZJPUDSLNTQU-SEYXRHQNSA-N petroselinic acid Chemical compound CCCCCCCCCCC\C=C/CCCCC(O)=O CNVZJPUDSLNTQU-SEYXRHQNSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 235000019512 sardine Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- JIWBIWFOSCKQMA-UHFFFAOYSA-N stearidonic acid Natural products CCC=CCC=CCC=CCC=CCCCCC(O)=O JIWBIWFOSCKQMA-UHFFFAOYSA-N 0.000 description 1
- 229920001866 very low density polyethylene Polymers 0.000 description 1
Landscapes
- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、導体と発泡絶縁電線の製造方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a conductor and a foam insulated wire.
［従来の技術］
コンピュータ、電話通信などの高速情報回路においては
、低誘電率の電線が必要とされており、発泡ポリオレフ
ィン絶縁電線が多用されてきている。[Prior Art] In high-speed information circuits such as computers and telephone communications, electric wires with a low dielectric constant are required, and foamed polyolefin insulated electric wires have been frequently used.
発泡ポリオレフィン絶縁電線の製造方法としては、化学
発泡剤を含むポリオレフィンを押出機に供給して発泡剤
の分解温度以上の温度でもって溶融混練し、導体外周に
押出被覆する方法が一般に知られているが、この方法で
は、発泡剤の分解ガスが飛散しやす＜、５０％以上の高
発泡体を得ることが困難な状況にある。A generally known method for producing foamed polyolefin insulated wires is to supply polyolefin containing a chemical foaming agent to an extruder, melt and knead it at a temperature higher than the decomposition temperature of the foaming agent, and then extrude and coat the outer periphery of the conductor. However, with this method, the decomposed gas of the blowing agent tends to scatter, making it difficult to obtain a highly foamed product of 50% or more.
発泡剤の分解ガスの飛散を防止する対策として、特公昭
５３−４９０９には、発泡剤を含むプラスチック混和物
を導体上に押出被覆した後、放射線、電子線により連続
的に架橋し、続いて加圧流体雰囲気中で加熱して発泡さ
せる製造方法が提案されている。As a measure to prevent the scattering of the decomposed gas of the blowing agent, Japanese Patent Publication No. 53-4909 proposes that a plastic mixture containing a blowing agent is extruded onto a conductor, then continuously crosslinked with radiation and electron beams, and then A manufacturing method has been proposed in which foaming is performed by heating in a pressurized fluid atmosphere.
Ｕ発明が解決しようとする問題点］
しかし、この方法によれば、流体加圧設備が必要である
ことから汎用性に欠け、ま°た、圧力変動による外径の
不均一、流体による絶縁電線の汚損などの問題がある。[Problems to be Solved by the Invention] However, this method lacks versatility because it requires fluid pressurization equipment, and also has problems such as uneven outer diameter due to pressure fluctuations and insulated wires caused by fluid. There are problems such as contamination.
このため、常圧下での加熱発泡について種々検討したと
ころ、発泡剤として最も適切なアゾジカルボンアミドを
使用した場合、導体と発泡絶縁体とが粘着し、ワイヤス
トリッパを用いて発泡絶縁体を剥取る際、導体周囲に発
泡絶縁体が残り、端末処理作業性が極めて悪くなること
が指摘されるに至った。For this reason, we conducted various studies on heating and foaming under normal pressure, and found that when azodicarbonamide, which is the most suitable foaming agent, was used, the conductor and foamed insulator would stick together, and the foamed insulator could be peeled off using a wire stripper. In this case, it has been pointed out that foamed insulators remain around the conductors, making it extremely difficult to process the terminals.
本発明は、上記に基づいてなされたもので、高発泡化が
可能であり、しかも導体と発泡絶縁体との粘着を抑制し
て発泡絶縁体の剥離を容易とする発泡絶縁電線の製造方
法の提供を目的とするものである。The present invention has been made based on the above, and provides a method for manufacturing a foam insulated wire that can be highly foamed, suppresses adhesion between a conductor and a foam insulator, and facilitates peeling of the foam insulator. It is intended for the purpose of providing.
［問題点を解決するための手段］
本発明の発泡絶縁電線の製造方法は、ポリオレフィン１
００重量部に対してアゾジカルボンアミド０．５〜１５
重１部および式Ｐｂ （ＯＯＣＲ）、、で示される鉛石
鹸（Ｒは炭素数７以上のアルキル基、ｎは２または４）
０．０５〜５重量部含有する樹脂組成物をアゾジカル
ボンアミドの分解温度以下の温度で導体外周に押出被覆
してから電離性放射線の照射により架橋せしめ、しかる
後アゾジカルボンアミドの分解温度以上に加熱して発泡
絶縁体を形成することを特徴とするものである。[Means for solving the problems] The method for producing a foam insulated wire of the present invention includes polyolefin 1
0.5 to 15 parts by weight of azodicarbonamide
1 part of lead soap represented by the formula Pb (OOCR) (R is an alkyl group having 7 or more carbon atoms, n is 2 or 4)
A resin composition containing 0.05 to 5 parts by weight is extruded and coated on the outer periphery of the conductor at a temperature below the decomposition temperature of azodicarbonamide, crosslinked by irradiation with ionizing radiation, and then heated to a temperature above the decomposition temperature of azodicarbonamide. It is characterized by forming a foamed insulator by heating.
本発明におけるポリオレフィンとしては、低密度ポリエ
チレン、中高密度ポリエチレン、リニア低密度ポリエチ
レン、超低密度ポリエチレン、ポリプロピレンなどが例
示されるが、これに限るものではない。Examples of the polyolefin in the present invention include, but are not limited to, low-density polyethylene, medium-high density polyethylene, linear low-density polyethylene, very low-density polyethylene, and polypropylene.
アゾジカルボンアミドは、分解温度が２００〜２１０℃
の粉末物質であり、分解によって発生するガスにより、
発泡体が形成される。アゾジカルボンアミドの添加量は
、ポリオレフィン１００重量部に対して０８５〜１５重
量部の範囲とする必要があり、０゜５重量部未満では発
泡が不十分であり、１５重量部を越えると発泡状態のコ
ントロールが難しくなる。Azodicarbonamide has a decomposition temperature of 200-210℃
It is a powder substance, and due to the gas generated by decomposition,
A foam is formed. The amount of azodicarbonamide added must be in the range of 0.85 to 15 parts by weight per 100 parts by weight of the polyolefin; if it is less than 0.5 parts by weight, foaming will be insufficient, and if it exceeds 15 parts by weight, foaming will occur. becomes difficult to control.
式Ｐｂ（ＯＯＣＲ）、で示される鉛石鹸（Ｒは炭素数７
以上のアルキル基、ｎは２または４）は、導体と発泡絶
縁体との粘着を抑制するために添加するものであるらす
なわち、導体と発泡絶縁体との粘着は、アゾジカルボン
アミドの分解残渣によるものであり、鉛石鹸はこの分解
残渣が生成されるのを抑制するものである。鉛石鹸の添
加量は、ポリオレフィン１００重量部に対して０．０５
〜５重量部の範囲であり、０．０５重量部未満では導体
と発泡絶縁体との粘着防止に効果がな（，５重量部を越
えるとアゾジカルボンアミドの分解温度を著しく低下さ
せるため、押出成形時に発泡してしまうことになる。Lead soap represented by the formula Pb(OOCR) (R is 7 carbon atoms)
The above alkyl group (n is 2 or 4) is added to suppress the adhesion between the conductor and the foamed insulator. The lead soap suppresses the generation of this decomposition residue. The amount of lead soap added is 0.05 parts by weight per 100 parts by weight of polyolefin.
If the amount is less than 0.05 parts by weight, it will not be effective in preventing adhesion between the conductor and the foamed insulator. This will result in foaming during molding.
鉛石鹸としては、ステアリン酸、ラウリン酸、リシノー
ル酸、ナフテン酸、２−エチルへキソイン酸、オクチル
酸、ヒドロキシステアリン酸、フタル酸などの鉛塩が好
適であるが、さらに、リンデル酸、エライジン酸、ツズ
酸、ガドレン酸、フィセトレイン酸、ゴンドラ酸、ミリ
ストレイン酸、鯨油酸、シーマリン酸、エルカ酸、ペト
ロセリン酸、ブランジン酸、オレイン酸、セラコイレン
酸、リノール酸、リノエライジン酸、リルン酸、エレオ
ステアリン酸、モロクチ酸、バリナリン酸、アラキドン
酸、イワシ酸、ヒラガシラ酸、ニシン酸などの鉛塩が例
示される。Suitable lead soaps include lead salts such as stearic acid, lauric acid, ricinoleic acid, naphthenic acid, 2-ethylhexoic acid, octylic acid, hydroxystearic acid, and phthalic acid. , tuzunic acid, gadoleic acid, physetoleic acid, gondolaic acid, myristoleic acid, cetacean oil acid, seamarinic acid, erucic acid, petroselic acid, branzic acid, oleic acid, ceracoleic acid, linoleic acid, linoleaidic acid, lylunic acid, Examples include lead salts such as rheostearic acid, moroctic acid, valinaric acid, arachidonic acid, sardine acid, hiraganic acid, and nisic acid.
ポリオレフィン、アゾジカルボンアミドおよび鉛石鹸を
必須成分として含有する樹脂組成物は、アゾジカルボン
アミドの分解温度以下の温度、例えば１６０℃以下の温
度で溶融混練を行い、導体外周に押出被覆する。続いて
、電子線などの電離性放射線を０．５〜５Ｍｒａｄの範
囲で照射して架橋し、常圧下でアゾジカルボンアミドの
分解温度以上に加熱して発泡絶縁体を形成する。この加
熱は、電気炉などを用いて連続的に行うのが好ましく、
設定温度は、アゾジカルボンアミドの分解温度よりも数
十度高くすることが好ましい。当然ではあるが、ポリオ
レフィンが分解してしまうような高温は避けるべきであ
る。A resin composition containing polyolefin, azodicarbonamide, and lead soap as essential components is melt-kneaded at a temperature below the decomposition temperature of azodicarbonamide, for example, at a temperature below 160° C., and extruded to coat the outer periphery of the conductor. Subsequently, the material is crosslinked by irradiation with ionizing radiation such as an electron beam in a range of 0.5 to 5 Mrad, and heated to a temperature higher than the decomposition temperature of azodicarbonamide under normal pressure to form a foamed insulator. This heating is preferably performed continuously using an electric furnace or the like.
The set temperature is preferably several tens of degrees higher than the decomposition temperature of azodicarbonamide. Of course, high temperatures that would cause the polyolefin to decompose should be avoided.
［発明の実施例］
実施例１
低密度ポリエチレン（宇部興産ＵＢＥＣ−４００） １
００重量部にアゾジカルボンアミド３重量部を添加し、
これを１３５℃に設定した８インチロールで混練してか
らステアリン酸鉛０．５重量部添加してコンパウンドと
した。このコンパウンドを２８ ｍ ｍ押出機（設定温
度１３０°Ｃ）に導入して溶融混練を行い、外径０．４
５ｍｍのスズメッキ銅線外周に厚さ１．０ｍｍに押出被
覆してした。続いて、電子線照射装置により１．５Ｍｒ
ａｄ照射して架橋を行い、３００℃に設定した内径７０
ｍｍφ、炉長２．５ｍの筒型電気炉中を常圧下で通過さ
せることにより発泡絶縁電線を製造した。[Examples of the invention] Example 1 Low density polyethylene (Ube Industries UBEC-400) 1
Adding 3 parts by weight of azodicarbonamide to 00 parts by weight,
This was kneaded with an 8-inch roll set at 135°C, and then 0.5 part by weight of lead stearate was added to form a compound. This compound was introduced into a 28 mm extruder (temperature set at 130°C) and melt-kneaded to give an outer diameter of 0.4 mm.
The outer periphery of a 5 mm tin-plated copper wire was coated by extrusion to a thickness of 1.0 mm. Subsequently, 1.5 Mr.
Cross-linked by ad irradiation and set at 300°C with an inner diameter of 70
A foamed insulated wire was produced by passing it through a cylindrical electric furnace with mmφ and furnace length of 2.5 m under normal pressure.
この絶縁電線の発泡度は約６５％であり、しかも、発泡
絶縁体のワイヤストリッパによる剥取りは極めて容易で
あった。The degree of foaming of this insulated wire was approximately 65%, and the foamed insulator was extremely easy to strip with a wire stripper.
実施例２
低密度ポリエチレン（宇部興産ＵＢＥＣ−４００） １
００重量部にアゾジカルボンアミド３重量部およびリシ
ノール酸鉛０．５重量部を添加した以外は実施例１と同
様にして発泡絶縁電線を製造した。Example 2 Low density polyethylene (Ube Industries UBEC-400) 1
A foam insulated wire was produced in the same manner as in Example 1, except that 3 parts by weight of azodicarbonamide and 0.5 parts by weight of lead ricinoleate were added to 0.00 parts by weight.
この絶縁電線の発泡度は約６８％であり、しかも、発泡
絶縁体のワイヤストリッパによる剥取りは極めて容易で
あった。The degree of foaming of this insulated wire was about 68%, and the foamed insulator could be removed very easily with a wire stripper.
実施例３
低密度ポリエチレン（三井石油化学ミラソン３５３０）
１００重量部にアゾジカルボンアミド４重量部およびス
テアリン酸鉛０．３重量部を添加した以外は実施例■と
同様にして発泡絶縁電線を製造した。Example 3 Low density polyethylene (Mitsui Petrochemical Mirason 3530)
A foam insulated wire was produced in the same manner as in Example 2, except that 4 parts by weight of azodicarbonamide and 0.3 parts by weight of lead stearate were added to 100 parts by weight.
この絶縁電線の発泡度は約７０％であり、しかも、発泡
絶縁体のワイヤストリッパによる剥取りは極めて容易で
あった。The degree of foaming of this insulated wire was approximately 70%, and the foamed insulator was extremely easy to strip with a wire stripper.
実施例４
低密度ポリエチレン（三井石油化学ミラソン３５３０）
１００重景重量アゾジカルボンアミド４重量部およびラ
ウリン酸鉛０．６重量部を添加した以外は実施例１と同
様にして発泡絶縁電線を製造した。Example 4 Low density polyethylene (Mitsui Petrochemical Mirason 3530)
A foam insulated wire was produced in the same manner as in Example 1, except that 4 parts by weight of 100% azodicarbonamide and 0.6 parts by weight of lead laurate were added.
この絶縁電線の発泡度は約７３％であり、しかも、発泡
絶縁体のワイヤストリッパによる剥取りは極めて容易で
あった。The degree of foaming of this insulated wire was approximately 73%, and the foamed insulator was extremely easy to strip with a wire stripper.
実施例５
低密度ポリエチレン（三井石油化学ミラソン３５３０）
１００重量部にアゾジカルボンアミド４重量部およびナ
フテン酸鉛０．５重量部を添加した以外は実施例１と同
様にして発泡絶縁電線を製造した。Example 5 Low density polyethylene (Mitsui Petrochemical Mirason 3530)
A foam insulated wire was produced in the same manner as in Example 1, except that 4 parts by weight of azodicarbonamide and 0.5 parts by weight of lead naphthenate were added to 100 parts by weight.
この絶縁電線の発泡度は約７１％であり、しかも、発泡
絶縁体のワイヤストリッパによる剥取りは極めて容易で
あった。The degree of foaming of this insulated wire was approximately 71%, and the foamed insulator could be stripped off with a wire stripper extremely easily.
実施例６
低密度ポリエチレン（宇部興産ＵＢＥＣ−４００） １
００重量部にアゾジカルボンアミド３重量部およびヒド
ロキシステアリン酸鉛０．６重量部を添加した以外は実
施例１と同様にして発泡絶縁電線を製造した。Example 6 Low density polyethylene (Ube Industries UBEC-400) 1
A foam insulated wire was produced in the same manner as in Example 1, except that 3 parts by weight of azodicarbonamide and 0.6 parts by weight of lead hydroxystearate were added to 00 parts by weight.
この絶縁電線の発泡度は約６８％であり、しかも、発泡
絶縁体のワイヤストリッパによる剥取りは極めて容易で
あった。The degree of foaming of this insulated wire was about 68%, and the foamed insulator could be removed very easily with a wire stripper.
比較例１
低密度ポリエチレン（宇部興産ＵＢＥＣ−４００） １
００重量部にアゾジカルボンアミド３重量部を添加した
組成物を用いた以外は実施例１と同様にして発泡絶縁電
線を製造した。Comparative example 1 Low density polyethylene (Ube Industries UBEC-400) 1
A foamed insulated wire was produced in the same manner as in Example 1, except that a composition containing 00 parts by weight and 3 parts by weight of azodicarbonamide was used.
この絶縁電線の発泡度は約７０％であったが、導体と発
泡絶縁体が粘着し、発泡絶縁体のワイヤストリッパによ
る剥取りを行ったところ、導体上に発泡絶縁体が残った
。Although the degree of foaming of this insulated wire was about 70%, the conductor and the foamed insulator stuck together, and when the foamed insulator was removed using a wire stripper, the foamed insulator remained on the conductor.
比較例２
低密度ポリエチレン（三井石油化学ミラソン３５３０）
１００重量部にアゾジカルボンアミド４重量部を添加し
た組成物を用いた以外は実施例１と同様にして発泡絶縁
電線を製造した。Comparative Example 2 Low density polyethylene (Mitsui Petrochemical Mirason 3530)
A foamed insulated wire was produced in the same manner as in Example 1, except that a composition containing 100 parts by weight and 4 parts by weight of azodicarbonamide was used.
この絶縁電線の発泡度は約７６％であったが、導体と発
泡絶縁体が粘着し、発泡絶縁体のワイヤストリッパによ
る剥取りを行ったところ、導体上に発泡絶縁体が残った
。The degree of foaming of this insulated wire was about 76%, but the conductor and the foamed insulator stuck together, and when the foamed insulator was removed with a wire stripper, the foamed insulator remained on the conductor.
比較例３
ステアリン酸鉛の添加量を８重量部とした以外は実施例
１と同様にして発泡絶縁電線を製造した。Comparative Example 3 A foam insulated wire was produced in the same manner as in Example 1 except that the amount of lead stearate added was 8 parts by weight.
導体外周にコンパウンドを押出被覆する工程で発泡して
しまい、絶縁電線の製造は不可能でありた。Foaming occurred during the extrusion process of coating the outer periphery of the conductor with the compound, making it impossible to manufacture insulated wires.
比較例４
リシノール酸鉛の添加量を８重量部とした以外は実施例
１と同様にして発泡絶縁電線を製造した。Comparative Example 4 A foam insulated wire was produced in the same manner as in Example 1 except that the amount of lead ricinoleate added was 8 parts by weight.
導体外周にコンパウンドを押出被覆する工程で
゛発泡してしまい、絶縁電線の製造は不可能でありた
。In the process of extruding a compound around the conductor.
``Because of the foaming, it was impossible to manufacture insulated wires.
［発明の効果］
以上説明してきた通り、本発明によれば高発泡化が可能
となり、しかも導体と発泡絶縁体との粘着を防止して端
末処理作業性を向上できる発泡絶縁電線を実現できるよ
うになる。[Effects of the Invention] As explained above, according to the present invention, it is possible to realize a foam insulated wire that can be highly foamed, and can also prevent adhesion between the conductor and the foam insulator, thereby improving the workability of terminal processing. become.
Claims (1)
ボンアミド０．５〜１５重量部および式Ｐｂ（ＯＯＣＲ
）＿ｎで示される鉛石鹸（Ｒは炭素数７以上のアルキル
基、ｎは２または４）０．０５〜５重量部含有する樹脂
組成物をアゾジカルボンアミドの分解温度以下の温度で
導体外周に押出被覆してから電離性放射線の照射により
架橋せしめ、しかる後アゾジカルボンアミドの分解温度
以上に加熱して発泡絶縁体を形成することを特徴とする
発泡絶縁電線の製造方法。(1) 0.5 to 15 parts by weight of azodicarbonamide and formula Pb (OOCR
) A resin composition containing 0.05 to 5 parts by weight of lead soap represented by n (R is an alkyl group having 7 or more carbon atoms, n is 2 or 4) is applied to the outer periphery of the conductor at a temperature below the decomposition temperature of azodicarbonamide. 1. A method for producing a foamed insulated wire, which comprises extrusion coating, crosslinking by irradiation with ionizing radiation, and then heating above the decomposition temperature of azodicarbonamide to form a foamed insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62053699A JPH0824014B2 (en) | 1987-03-09 | 1987-03-09 | Method for manufacturing foam insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62053699A JPH0824014B2 (en) | 1987-03-09 | 1987-03-09 | Method for manufacturing foam insulated wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63221513A true JPS63221513A (en) | 1988-09-14 |
| JPH0824014B2 JPH0824014B2 (en) | 1996-03-06 |
Family
ID=12950063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62053699A Expired - Fee Related JPH0824014B2 (en) | 1987-03-09 | 1987-03-09 | Method for manufacturing foam insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0824014B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144933A (en) * | 1984-08-10 | 1986-03-04 | Hatsupoo Kagaku Kogyo Kk | Flame-retarding resin composition for extrusion foaming |
-
1987
- 1987-03-09 JP JP62053699A patent/JPH0824014B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144933A (en) * | 1984-08-10 | 1986-03-04 | Hatsupoo Kagaku Kogyo Kk | Flame-retarding resin composition for extrusion foaming |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0824014B2 (en) | 1996-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8013030B2 (en) | Process for the production of a moulding composed of foamed polytetrafluoroethylene | |
| US6064008A (en) | Conductor insulated with foamed fluoropolymer using chemical blowing agent | |
| KR20100126312A (en) | Method for providing an insulated electric high voltage dc cable or a high voltage dc termination or joint | |
| JPS63221513A (en) | Manufacture of foam insulated wire | |
| JPS63304533A (en) | Manufacture of foaming insulated electric wire | |
| JPS63224118A (en) | Manufacture of foam insulated wire | |
| JPS63195917A (en) | Manufacture of foam insulated wire | |
| JPS63224119A (en) | Manufacture of foam insulated wire | |
| JPS63224120A (en) | Manufacture of foam insulated wire | |
| JPH01117210A (en) | Manufacture of forming insulator wire | |
| JPS63225444A (en) | Manufacture of foam insulated wire | |
| JPS59196512A (en) | Method of producing high foamable plastic cable | |
| JP3262155B2 (en) | Corrugated tube for electromagnetic wave shielding | |
| JPS63170817A (en) | Manufacture of highly foaming insulated wire | |
| JP3761606B2 (en) | Manufacturing method of insulation composition for electric wire | |
| JPS598216A (en) | Polyolefin insulated power cable with semiconductive layer | |
| JPS59102930A (en) | Molding process | |
| JP3926827B1 (en) | Foaming resin composition, foam molding method, foamed coaxial cable and foamed coaxial cable manufacturing method | |
| JP3026755B2 (en) | Foamable resin composition for covering foamed insulated polyethylene and foamed insulated polyethylene covered wire manufactured by covering the same | |
| JPS6039712A (en) | Method of producing foamable polypropylene insulated wire | |
| JPS58178914A (en) | Method of producing high foamable plastic cable | |
| JP2001076544A (en) | Foaming insulated wire and manufacturing method of forming insulated wire | |
| JPS598732A (en) | Preparation of molded article of crosslinked polyolefin | |
| JPH0554729A (en) | Shielding wire | |
| JPH04155708A (en) | Electric wire/cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |