The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2002
Filed:
Jul. 14, 2000
Mitsubishi Cable Industries, Ltd., Amagasaki, JP;
Abstract
A foamable composition containing a base polymer containing a polyethylene mixture of a low density-polyethylene having a density of 0.91-0.925 g/cm and a high density polyethylene having a density of 0.94-0.97 g/cm , and a fluororesin powder and/or a boron nitride powder as a nucleator, wherein the high density polyethylene has an swelling ratio smaller than that of the low density polyethylene and a melt flow rate greater than that of the low density polyethylene, and is contained in a proportion of not less than 50 percent by weight of the polyethylene mixture, and the base polymer has a shear viscosity (temperature:170° C., shear rate:1216 sec ) of not more than 3150 poise, and a coaxial insulating cable having an electrically insulating layer formed of a foam having an expansion ratio of not less than 70% and obtained by foaming the above foamable composition are provided. The insulating layer formed from the foamable composition has superior attenuation property and can be suitably used for a feeder antenna of a portable communication device.