| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a foamed coaxial cable having a high power capacity, a small amount of attenuation in the high-frequency band (1 GHz or higher) and a relatively small diameter. <P>SOLUTION: To configure a small diameter foamed coaxial cable, the foamed insulator layer made of an EP copolymer wherein a breakage melt tension measured at 190°C with the capillary rheometer under a capillary tube ofΦ2.095 mm×8.03 mm at piston speed of 10 mm/min, a furnace diameter of 9.55 mm and a take-off acceleration of 400 m/min<SP>2</SP>is 4.0 g or more and a melt mass flow rate at 190°C and 2.16 kg is 0.6 g/10 min or higher is provided on an inner conductor so that the extent of foaming becomes 50% or higher. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
