Preparation of signal transmission coaxial cable and physic foaming insulation layer and mould

A technology of foaming insulating layer and physical foaming, which is applied in the direction of coaxial cable/analog cable, conductor/cable insulation, etc., which can solve the problems of impossible synchronization of foaming insulating layer, reduced voltage standing wave performance, and increased cable attenuation and other problems, to achieve the effect of reducing the dielectric constant and dielectric loss tangent, increasing the degree of insulation foaming, and reducing transmission attenuation
CN1822245AInactive Publication Date: 2006-08-23JIANGSU HENGXIN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU HENGXIN TECH CO LTD
Publication Date
2006-08-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

Said invention relates to improvement to signal transmission coaxial cable, featuring cable internal conductor outer physics sparkle insulating layer being secondary extruding composed double layer compound sparkle insulation. Due to adopting secondary physics sparkle extrusion laminating, said invention not only solves inside and outside cooling down misproportion problem and resulted fault of once extruded moulding of thick physics sparkle insulation, greatly raising radial and longitudinal sparkle hole uniformity without bunlla hole and cuniculus. For example the leakance RF coaxial cable sparkle degree can be raised to more than 78 per cent, reducing cable dielectric constant and dielectric loss tangent value, reducing cable transmission attenuation, voltage standing wave ratio less than 1.15 with fine product consistency. Said invented insulation physics sparkle forming method and mould is suitable for signal transmission coaxial cable sparkle insulation with greater than 10 mm sparkle insulation thickness.
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Description

technical field

[0001] The invention relates to the improvement of the coaxial cable for signal transmission, in particular to a coaxial cable with a thicker (eg ≥ 10mm) physically foamed insulating layer, preparation of the physically foamed insulating layer and an insulating extrusion die. Background technique

[0002] Coaxial cables for signal transmission, in order to reduce the dielectric constant of the insulation and reduce cable attenuation, usually use physical foam insulation to form a uniform and mutually closed cell insulation structure. In some special applications and to save materials, it is necessary to manufacture coaxial cables with insulation thickness greater than 10mm. However, for thick foam insulation, due to the constraints of the physical foaming process, it is impossible to synchronize the inner and outer cooling of the thickness of the foam insulation layer. Uneven cooling inside and outside the insulation layer will lead to poor uniformity of ins...

Claims

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