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Coaxial cable

A coaxial cable and low-density polyethylene technology, which is applied in the manufacture of coaxial cables, coaxial cables/analog cables, insulated cables, etc., can solve the problems of difficulty in maintaining the shape of the foam and the reduction of the lateral pressure resistance of the insulating layer , to achieve the effect of reducing the dielectric constant, reducing the delay time, and reducing the dielectric loss tangent

Inactive Publication Date: 2014-05-28
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, foaming may reduce the lateral pressure resistance of the insulating layer, which may cause difficulty in maintaining the shape of the foam

Method used

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Embodiment

[0114] Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not limited to these Examples.

[0115]

[0116] [Cyclic Olefin Resin]

[0117] ・Manufactured by TOPAS ADVANCED POLYMER, brand names: TOPAS8007F-04, TOPAS6013S-04, TOPAS6015S-04

[0118] ・ZEON Co., Ltd., product name: ZEONOR 1060R

[0119] The elastic modulus, specific gravity, dielectric constant, and dielectric loss tangent of the above-mentioned cyclic olefin resin were measured. The modulus of elasticity is determined according to ISO 178. Dielectric properties (dielectric constant, dielectric loss tangent) were measured at 23°C by the cavity resonator perturbation method using Network analyzer 8757D manufactured by Agilent and a cavity resonator complex dielectric constant measuring device manufactured by Kanto Electronics Co., Ltd. Relative permittivity at 3GHz, 10GHz. In addition, during the measurement, the insulating layer ...

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Abstract

To provide a coaxial cable for high frequency transmission in which an insulator layer formed to cover the inner conductor in the coaxial cable has sufficient lateral pressure resistance, and low attenuation in transmission. Foam molding of a resin composition containing a cyclic olefin-based resin, a high density polyethylene, and a low density polyethylene and / or a linear low-density polyethylene enables formation of an insulating layer that has a high extent of foaming, and is excellent in mechanical strength, as compared with conventional insulating layers. Consequently, the insulator layer formed by covering the inner conductor in a coaxial cable will have a low dielectric dissipation factor and relative permittivity whereby a coaxial cable for high frequency transmission that is excellent in transmission characteristics and mechanical characteristics can be provided.

Description

technical field [0001] The present invention relates to a coaxial cable using a cyclic olefin resin. Background technique [0002] In recent years, there has been an increasing demand for broadband communication such as mobile phones, the Internet, and wireless LANs (Local Area Networks). In addition, in order to transmit information at a higher speed and in large quantities, the frequency increase of electric signals is progressing remarkably. Therefore, there is a demand for a coaxial cable with a small amount of attenuation and a small signal delay in a high frequency band. [0003] A coaxial cable is mainly composed of a central conductor, an insulator layer provided thereon, and an outer conductor provided on its outer periphery. Low attenuation in high-frequency bands is important, and it is most effective to reduce the dielectric loss tangent of the insulating layer for realizing high-frequency coaxial cables. In addition, foaming is effective for further reducing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/02H01B3/44H01B11/18
CPCH01B13/016H01B11/1839H01B3/441
Inventor 谷北真澄芹泽肇
Owner POLYPLASTICS CO LTD
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