JPH0824014B2 - Method for manufacturing foam insulated wire - Google Patents
Method for manufacturing foam insulated wireInfo
- Publication number
- JPH0824014B2 JPH0824014B2 JP62053699A JP5369987A JPH0824014B2 JP H0824014 B2 JPH0824014 B2 JP H0824014B2 JP 62053699 A JP62053699 A JP 62053699A JP 5369987 A JP5369987 A JP 5369987A JP H0824014 B2 JPH0824014 B2 JP H0824014B2
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000006260 foam Substances 0.000 title description 17
- 238000000034 method Methods 0.000 title description 5
- 239000004156 Azodicarbonamide Substances 0.000 claims description 23
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 23
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 23
- 239000004020 conductor Substances 0.000 claims description 20
- 238000000354 decomposition reaction Methods 0.000 claims description 15
- 229920000098 polyolefin Polymers 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000000344 soap Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 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
- 238000005187 foaming Methods 0.000 description 16
- 239000012212 insulator Substances 0.000 description 15
- 239000002253 acid Substances 0.000 description 12
- 229920001684 low density polyethylene Polymers 0.000 description 10
- 239000004702 low-density polyethylene Substances 0.000 description 10
- 239000004088 foaming agent Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 150000001875 compounds Chemical class 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
- 238000010894 electron beam technology Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- BITHHVVYSMSWAG-KTKRTIGZSA-N (11Z)-icos-11-enoic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCC(O)=O BITHHVVYSMSWAG-KTKRTIGZSA-N 0.000 description 2
- YWWVWXASSLXJHU-AATRIKPKSA-N (9E)-tetradecenoic acid Chemical compound CCCC\C=C\CCCCCCCC(O)=O YWWVWXASSLXJHU-AATRIKPKSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-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
- ZQPPMHVWECSIRJ-MDZDMXLPSA-N elaidic acid Chemical compound CCCCCCCC\C=C\CCCCCCCC(O)=O ZQPPMHVWECSIRJ-MDZDMXLPSA-N 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- CNVZJPUDSLNTQU-SEYXRHQNSA-N petroselinic acid Chemical compound CCCCCCCCCCC\C=C/CCCCC(O)=O CNVZJPUDSLNTQU-SEYXRHQNSA-N 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
- -1 polypropylene Polymers 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
- YHGJECVSSKXFCJ-KUBAVDMBSA-N (6Z,9Z,12Z,15Z,18Z,21Z)-tetracosahexaenoic acid Chemical compound CC\C=C/C\C=C/C\C=C/C\C=C/C\C=C/C\C=C/CCCCC(O)=O YHGJECVSSKXFCJ-KUBAVDMBSA-N 0.000 description 1
- 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
- GCORITRBZMICMI-CMDGGOBGSA-N (e)-dodec-4-enoic acid Chemical compound CCCCCCC\C=C\CCC(O)=O GCORITRBZMICMI-CMDGGOBGSA-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
- OXEDXHIBHVMDST-UHFFFAOYSA-N 12Z-octadecenoic acid Natural products CCCCCC=CCCCCCCCCCCC(O)=O OXEDXHIBHVMDST-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
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-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
- 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
- GCORITRBZMICMI-UHFFFAOYSA-N Linderic acid Natural products CCCCCCCC=CCCC(O)=O GCORITRBZMICMI-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- CNVZJPUDSLNTQU-UHFFFAOYSA-N Petroselaidic acid Natural products CCCCCCCCCCCC=CCCCCC(O)=O CNVZJPUDSLNTQU-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 241001125046 Sardina pilchardus Species 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 229940114079 arachidonic acid Drugs 0.000 description 1
- 235000021342 arachidonic acid Nutrition 0.000 description 1
- 238000004132 cross linking 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
- 229940108623 eicosenoic acid Drugs 0.000 description 1
- BITHHVVYSMSWAG-UHFFFAOYSA-N eicosenoic acid Natural products CCCCCCCCC=CCCCCCCCCCC(O)=O BITHHVVYSMSWAG-UHFFFAOYSA-N 0.000 description 1
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 1
- 235000021299 gondoic acid Nutrition 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
- 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-AVQMFFATSA-N linoelaidic acid Chemical compound CCCCC\C=C\C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-AVQMFFATSA-N 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
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 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
- AQWHMKSIVLSRNY-UHFFFAOYSA-N trans-Octadec-5-ensaeure Natural products CCCCCCCCCCCCC=CCCCC(O)=O AQWHMKSIVLSRNY-UHFFFAOYSA-N 0.000 description 1
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 description 1
- 239000010698 whale oil Substances 0.000 description 1
Landscapes
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、高発泡化が可能であり、しかも導体と発泡
絶縁体との粘着を防止した発泡絶縁電線の製造方法に関
するものである。TECHNICAL FIELD The present invention relates to a method for producing a foam-insulated electric wire, which is capable of high foaming and which prevents adhesion between a conductor and a foam insulator.
［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。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
ガスが飛散しやすく、50％以上の高発泡体を得ることが
困難な状況にある。[Background Art] In high-speed information circuits such as computers and telephone communications, low dielectric constant electric wires are required, and foamed polyolefin insulated electric wires are frequently used. As a method for producing a foamed polyolefin insulated wire, a method is generally known in which a polyolefin containing a chemical foaming agent is supplied to an extruder, melted and kneaded at a temperature equal to or higher than the decomposition temperature of the foaming agent, and extrusion-coated on the outer circumference of the conductor. However, in this method, the decomposition gas of the foaming agent is easily scattered, and it is difficult to obtain a high-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 decomposition gas of the foaming agent from scattering, in JP-B-53-4909, a plastic mixture containing a foaming agent is extrusion-coated on a conductor and then continuously crosslinked by radiation and electron beams, There has been proposed a manufacturing method in which foaming is performed by heating in a pressurized fluid atmosphere.
［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、圧力変動により外径の
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 a fluid pressurizing facility is required, and the outer diameter is not uniform due to pressure fluctuation, and the insulated wire is contaminated by the fluid. There are problems such as.
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, various studies were conducted on heat foaming under normal pressure. When the most suitable azodicarbonamide was used as a foaming agent, the conductor and foamed insulation adhered and the foamed insulation was peeled off using a wire stripper. At this time, it has been pointed out that the foam insulation remains around the conductor and the workability of the terminal treatment is extremely deteriorated.
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 on the basis of the above, and is a method for manufacturing a foam insulated wire, which is capable of high foaming, and which suppresses adhesion between a conductor and a foam insulating material and facilitates peeling of the foam insulating material. It is intended to be provided.
［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
100重量部に対してアゾジカルボンアミド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
特徴とするものである。[Means for Solving the Problems] The method for producing a foamed insulated wire according to the present invention comprises a polyolefin
0.5 to 15 parts by weight of azodicarbonamide and 100 parts by weight of lead soap represented by the formula Pb (OOCR) n (where R is 7 carbon atoms)
The above alkyl group, n is 2 or 4) A resin composition containing 0.05 to 5 parts by weight is extrusion-coated on the outer circumference of the conductor at a temperature not higher than the decomposition temperature of azodicarbonamide, and then crosslinked by irradiation with ionizing radiation. It is characterized in that the foamed insulating material is formed by heating at a temperature higher than the decomposition temperature of the latter azodicarbonamide.
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, ultra low density polyethylene, polypropylene and the like.
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0.5〜15重量部の範囲と
する必要があり、0.5重量部末端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 is a powder substance having a decomposition temperature of 200 to 210 ° C., and a gas generated by the decomposition forms a foam. The amount of azodicarbonamide added should be in the range of 0.5 to 15 parts by weight with respect to 100 parts by weight of the polyolefin, and the foaming is insufficient at the end of 0.5 parts by weight. Becomes difficult.
式Pb（OCCR）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）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。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く、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 (OCCR) n (R is an alkyl group having 7 or more carbon atoms, n is 2 or 4) is added to suppress adhesion between the conductor and the foamed insulator. That is, the adhesion between the conductor and the foamed insulator is due to the decomposition residue of azodicarbonamide, and the lead soap suppresses the generation of this decomposition residue. The amount of lead soap added is in the range of 0.05 to 5 parts by weight with respect to 100 parts by weight of polyolefin. Since the decomposition temperature of dicarbonamide is remarkably lowered, foaming occurs during extrusion 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−エチルヘキソイン酸、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、カドレン酸、フィセトレイン酸、ゴンドウ酸、ミ
リストレイン酸、鯨油酸、ゾーマリン酸、エルカ酸、ペ
トロセリン酸、プランジン酸、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、リノレン酸、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。As the lead soap, lead salts such as stearic acid, lauric acid, ricinoleic acid, naphthenic acid, 2-ethylhexoic acid, octylic acid, hydroxystearic acid, and phthalic acid are preferable, and further, linderic acid, elaidic acid, and tsuleic acid. Dusic acid, cadrenic acid, ficetrain acid, gondoic acid, myristoleic acid, whale oil acid, zomarinic acid, erucic acid, petroselinic acid, planzic acid, oleic acid, cerakoylene acid, linoleic acid, linoelaidic acid, linolenic acid, eleo Examples thereof include lead salts such as stearic acid, moloctic acid, valinaric acid, arachidonic acid, sardine acid, hiragashicholic acid and nisinic 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。The resin composition containing polyolefin, azodicarbonamide and lead soap as essential components is melt-kneaded at a temperature not higher than the decomposition temperature of azodicarbonamide, for example at a temperature not higher than 160 ° C., and extrusion-coated on the outer circumference of the conductor. Then, ionizing radiation such as an electron beam is irradiated in the range of 0.5 to 5 Mrad to crosslink, and heated at a temperature not lower than the decomposition temperature of azodicarbonamide under normal pressure to form a foamed insulator. This heating
It is preferable to carry out continuously using an electric furnace or the like, and the set temperature is preferably higher than the decomposition temperature of azodicarbonamide by several tens of degrees. Of course, high temperatures at which the polyolefin decomposes 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）100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28mm押出機（設定温度130℃）に導入して溶
融混練を行い、外径0.45mm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1.5Mrad照射して架橋を行い、300℃に設定した内径
70mmφ、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 To 100 parts by weight of low-density polyethylene (UBEC-400 manufactured by Ube Industries, Ltd.), 3 parts by weight of azodicarbonamide was added, and 135 parts of this was added.
The mixture was kneaded with an 8-inch roll set at 0 ° C., and then 0.5 part by weight of lead stearate was added to obtain a compound. This compound was introduced into a 28mm extruder (set temperature 130 ° C), melted and kneaded, and had a thickness of 0.45mm on the outer circumference of a tin-plated copper wire.
It was extrusion coated to 1.0 mm. Subsequently, 1.5 Mrad was irradiated by an electron beam irradiation device to perform cross-linking, and the inner diameter set to 300 ° C
A foam insulated wire was produced by passing it through a cylindrical electric furnace having a diameter of 70 mm and a 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 about 65%, and it was extremely easy to peel off the foamed insulator with a wire stripper.
実施例２ 低密度ポリエチレン（宇部興産UBEC−400）100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 2 100 parts by weight of low-density polyethylene (UBEC-400, Ube Industries), 3 parts by weight of azodicarbonamide and lead ricinoleate
A foam insulated wire was produced in the same manner as in Example 1 except that 0.5 part by weight was added.
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 was extremely easily peeled off by the 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）10
0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１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) 10
A foam insulated wire was produced in the same manner as in Example 1 except that 4 parts by weight of azodicarbonamide and 0.3 part by weight of lead stearate were added to 0 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 foamed degree of this insulated wire was about 70%, and the foamed insulator was extremely easily peeled off by the 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）10
0重量部に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) 10
A foam insulated wire was produced in the same manner as in Example 1 except that 4 parts by weight of azodicarbonamide and 0.6 parts by weight of lead laurate were added to 0 parts by weight.
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 about 73%, and it was extremely easy to peel off the foamed insulation 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）10
0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) 10
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 0 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 about 71%, and it was extremely easy to peel off the foamed insulation with a wire stripper.
実施例６ 低密度ポリエチレン（宇部興産UBEC−400）100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 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 part by weight of lead hydroxystearate were added to 100 parts by weight of low-density polyethylene (UBEC-400 manufactured by Ube Industries).
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 was extremely easily peeled off by the wire stripper.
比較例１ 低密度ポリエチレン（宇部興産UBEC−400）100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 A foam insulated wire was produced in the same manner as in Example 1 except that a composition obtained by adding 3 parts by weight of azodicarbonamide to 100 parts by weight of low-density polyethylene (UBEC-400 manufactured by Ube Industries) 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 adhered to each other. When the foamed insulator was peeled off with 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）10
0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) 10
A foam insulated wire was produced in the same manner as in Example 1 except that the composition in which 4 parts by weight of azodicarbonamide was added to 0 parts by weight.
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。Although the foaming degree of this insulated wire was about 76%, the conductor and the foamed insulator adhered to each other. When the foamed insulator was peeled off 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った。It was impossible to manufacture an insulated wire because foaming occurred in the step of extrusion-coating the outer circumference of the conductor.
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った。It was impossible to manufacture an insulated wire because foaming occurred in the step of extrusion-coating the outer circumference of the conductor.
比較例５ 低密度ポリエチレン（三井石油化学ミラソン3530）10
0重量部にアゾジカルボンアミド３重量部およびステア
リン酸0.5重量部を添加したコンパウンドを用いた以外
は実施例１と同様にして発泡絶縁電線を製造した。Comparative Example 5 Low-density polyethylene (Mitsui Petrochemical Mirason 3530) 10
A foamed insulated wire was manufactured in the same manner as in Example 1 except that a compound obtained by adding 3 parts by weight of azodicarbonamide and 0.5 part by weight of stearic acid to 0 parts by weight was used.
この絶縁電線の発泡度は約75％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 75%, but the conductor and the foamed insulation adhered to each other, and when the foamed insulation was stripped off with a wire stripper, the foamed insulation remained on the conductor.
［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 described above, according to the present invention, it is possible to realize a foamed insulated wire that can be highly foamed and that can prevent sticking between a conductor and a foamed insulator to improve workability of terminal treatment. become.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高野 英雄 茨城県日立市日高町５丁目１番１号 日立 電線株式会社日高工場内 (72)発明者 阿部 典元 茨城県日立市日高町５丁目１番１号 日立 電線株式会社日高工場内 (72)発明者 市毛 敏明 茨城県日立市日高町５丁目１番１号 日立 電線株式会社日高工場内 (56)参考文献 特開 昭48−22559（ＪＰ，Ａ) 特開 昭61−44933（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Takano 5-1-1 Hidaka Town, Hitachi City, Ibaraki Prefecture Hitachi Cable Co., Ltd. Hidaka Plant (72) Inventor Norimoto Abe Hidaka Town, Hitachi City, Ibaraki Prefecture 5-1-1 Hitachi Cable Co., Ltd. Hidaka Plant (72) Inventor Toshiaki Ichimo 5-1-1 Hidaka Town, Hitachi City, Ibaraki Hitachi Cable Co., Ltd. Hidaka Plant (56) References Sho 48-22559 (JP, A) JP-A 61-44933 (JP, A)
Claims (1)
カルボンアミド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 per 100 parts by weight of polyolefin and lead soap represented by the formula Pb (OOCR) n (R is an alkyl group having 7 or more carbon atoms, n is 2 or 4) 0.05 -5 parts by weight of the resin composition is extrusion-coated on the outer circumference of the conductor at a temperature not higher than the decomposition temperature of azodicarbonamide, and then crosslinked by irradiation with ionizing radiation.
A method for producing a foam-insulated electric wire, which comprises heating the composition to a temperature above the decomposition temperature of azodicarbonamide to form a foamed insulation.
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 JPS63221513A (en) | 1988-09-14 |
| JPH0824014B2 true 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) |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63221513A (en) | 1988-09-14 |
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