| (19) |
 |
|
(11) |
EP 0 540 322 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
15.09.1993 Bulletin 1993/37 |
| (43) |
Date of publication A2: |
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05.05.1993 Bulletin 1993/18 |
| (22) |
Date of filing: 29.10.1992 |
|
| (51) |
International Patent Classification (IPC)5: H01B 11/18 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
30.10.1991 JP 284452/91
|
| (71) |
Applicant: THE FURUKAWA ELECTRIC CO., LTD. |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
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- Hattori, Masanori
Ichihara-shi,
Chiba (JP)
- Yamamoto, Shoji
Ichihara-shi,
Chiba (JP)
- Oishi, Yoshiaki
Chiba-shi,
Chiba (JP)
|
| (74) |
Representative: Calamita, Roberto |
|
Frank B. Dehn & Co.
Imperial House
15-19 Kingsway
London WC2B 6UZ
London WC2B 6UZ (GB) |
|
| |
|
| (54) |
Foamed plastic insulated wires and coaxial cables using the same |
(57) A foamed plastic insulated wire which comprises a conductor, a foamed polymer insulation
layer formed on the periphery of the conductor, and at least one multifilament of
a plastic material having no aromatic ring in its molecular structure, the multifilament
being longitudinally extended or spirally wound on the periphery of the foamed polymer
insulation layer so as to be fixed thereto. This wire, having a shorter time delay
in signal propagation and enjoying higher density-normalized tensile strength, can
be a useful electronic signal transmission line for a computer, and improves in bending
strength, laser cutting properties, and cable assembly performance.