JPS5456184A - High foamed polyolefin insulated wire manufactruting process - Google Patents

High foamed polyolefin insulated wire manufactruting process

Info

Publication number
JPS5456184A
JPS5456184A JP12192477A JP12192477A JPS5456184A JP S5456184 A JPS5456184 A JP S5456184A JP 12192477 A JP12192477 A JP 12192477A JP 12192477 A JP12192477 A JP 12192477A JP S5456184 A JPS5456184 A JP S5456184A
Authority
JP
Japan
Prior art keywords
foaming
core
coated
extrusion
layer
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
Application number
JP12192477A
Other languages
Japanese (ja)
Other versions
JPS5719529B2 (en
Inventor
Fumio Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP12192477A priority Critical patent/JPS5456184A/en
Publication of JPS5456184A publication Critical patent/JPS5456184A/en
Publication of JPS5719529B2 publication Critical patent/JPS5719529B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B29C47/92—

Landscapes

  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Manufacturing Of Electric Cables (AREA)

Abstract

PURPOSE:To obtain insulated wires with excellent electrical characteristics and mechanical strength by extrusion-coating foaming polyolefin material on a core through an adhesive layer, keeping the temperature of the core high, high-foaming the core section, and coating a non-foaming layer around it. CONSTITUTION:The foaming polyolefin material containing volatile liquid is extrusion-coated on a core through an adhesive layer and the temperature of the core is kept high until foaming is completed. A high-foaming insulation layer is formed on the core side and a non-foaming layer is coated around it. For example, after the 0.1 mm thick low density polyethylene is coated on the core of 2.3 mm in diameter as the adhesive layer, it is preheated at 80 deg.C. High foaming polyethylene containing 4.8 weight percentage of tetrafluorodichloethane is extrusion-coated on it as an foaming agent and it is foamed while it is passed through a sizing die of 10 mm in inside diameter which is kept at 20 deg.C. Then, immediately after it is passed through the sizing die, non-foaming polyolefin of 0.3 mm in thickness is coated and insulated wires are obtained.
JP12192477A 1977-10-13 1977-10-13 High foamed polyolefin insulated wire manufactruting process Granted JPS5456184A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12192477A JPS5456184A (en) 1977-10-13 1977-10-13 High foamed polyolefin insulated wire manufactruting process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12192477A JPS5456184A (en) 1977-10-13 1977-10-13 High foamed polyolefin insulated wire manufactruting process

Publications (2)

Publication Number Publication Date
JPS5456184A true JPS5456184A (en) 1979-05-04
JPS5719529B2 JPS5719529B2 (en) 1982-04-23

Family

ID=14823277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12192477A Granted JPS5456184A (en) 1977-10-13 1977-10-13 High foamed polyolefin insulated wire manufactruting process

Country Status (1)

Country Link
JP (1) JPS5456184A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155727A (en) * 1980-05-02 1981-12-02 Inoue Mtp Co Ltd Method for molding pipe cover formed of foamed synthetic resin integrally on outer periphery of pipe
JPS58132528A (en) * 1982-02-02 1983-08-06 Sumitomo Electric Ind Ltd Manufacture of tubular foam

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914987A (en) * 1972-06-05 1974-02-08
JPS50149758A (en) * 1974-05-23 1975-12-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914987A (en) * 1972-06-05 1974-02-08
JPS50149758A (en) * 1974-05-23 1975-12-01

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155727A (en) * 1980-05-02 1981-12-02 Inoue Mtp Co Ltd Method for molding pipe cover formed of foamed synthetic resin integrally on outer periphery of pipe
JPH0127848B2 (en) * 1980-05-02 1989-05-31 Inoue Mtp Kk
JPS58132528A (en) * 1982-02-02 1983-08-06 Sumitomo Electric Ind Ltd Manufacture of tubular foam

Also Published As

Publication number Publication date
JPS5719529B2 (en) 1982-04-23

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