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Double-sided conducting metal foil film belt and cable employing same

A technology of metal foil and film tape, applied in the direction of twisted/quad-stranded cables, bendable cables, cables, etc., can solve the problem of data transmission quality degradation, difficulty in obtaining bandwidth and transmission rate, and inability to To achieve the physical continuity and completeness of the shielding layer path, etc., to reduce the consumption of metal resources, enhance the EMI effect, and simplify the manufacturing process

Inactive Publication Date: 2016-07-06
DONGGUAN LANMU MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, in data transmission cables that require softness and bending resistance, especially high-speed cables, the traditional single-sided metal foil Mylar, double-sided non-conductive metal foil composite Mylar tape, braiding, winding and The combined use of these methods is due to the fact that the physical continuity and integrity of the shielding layer path cannot be achieved.
As a result, the quality of data transmission decreases when the cable transmission frequency increases, making it difficult to obtain higher bandwidth and transmission rate

Method used

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  • Double-sided conducting metal foil film belt and cable employing same
  • Double-sided conducting metal foil film belt and cable employing same
  • Double-sided conducting metal foil film belt and cable employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 A double-sided conduction metal foil tape shown includes a base material 1, and the base material 1 is provided with a film layer 11 and a metal foil film layer 12 in sequence, and the film layer 11 adopts a film with longitudinal dimension stability, such as polyethylene terephthalic acid Ethylene glycol ester PET, polyethylene naphthalate PEN, polypropylene PP, polyimide PI, polyether ether ketone PEEK or polytetrafluoroethylene PTFE, in this embodiment, the film layer 11 adopts poly Ethylene glycol phthalate PET, the metal foil layer in the metal foil film layer 12 is an aluminum foil layer; the metal film layer in the metal foil film layer 12 is obtained by vacuum evaporation. The base material 1 is folded toward the film layer 11 to form an upper metal foil layer 21 and a lower metal foil layer 22. In this embodiment, the method of folding in half is adopted, that is, the widths of the upper metal foil layer 21 and the lower metal foil layer 22 are...

Embodiment 2

[0041] In this example, if figure 2 As shown, the width of the upper metal foil layer 21 is 30% of the width of the lower metal foil layer 22, of course, the width of the upper metal foil layer 21 can be selected according to needs, generally speaking, the width of the upper metal foil layer 21 is 10% to 100% of the width of the foil layer 22 . The film layer 11 is made of polytetrafluoroethylene PTFE, the metal foil layer in the metal foil film layer 12 is a copper foil layer, and the metal film layer is obtained by magnetron sputtering or ion plating. Other conditions are the same as in Example 1. Additionally, if Figure 4As shown, when in use, for the convenience of winding to the core wire, the metal foil tapes can be tightly bonded, and the film surface of the film layer 11 that exceeds the upper metal foil film layer 21 after the lower metal foil film layer 22 is bent is provided with heat. For the melt adhesive layer 3 , during use, the sticking temperature of the ...

Embodiment 3

[0045] In this example, if image 3 As shown, the part of the lower metal foil layer 22 that exceeds the upper metal foil layer 21 is folded in the direction of the upper metal foil layer 21 and attached to the upper metal foil layer 21, that is, the excess is folded in half. The film layer 11 is a PP layer, the metal foil layer in the metal foil film layer 12 is a silver foil layer, and the metal film layer is obtained by ion plating, and other conditions are the same as in the first embodiment. In addition, the metal foil layer and the metal film layer can be used alone or laminated and composited. The metal foil layer can be one or more combinations of aluminum foil layer, silver foil layer or copper foil layer; One or more of sputtering, ion implantation plating and auxiliary plating, chemical vapor deposition.

[0046] The shielding performance of the product can be further improved by adopting the method of excess half-folding or multi-layer coating.

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Abstract

The invention relates to the technical field of cable shielded transmission, and especially relates to a double-sided conducting metal foil film belt used in the shielding layer of a data transmission line. A substrate is folded in the film layer direction to form an upper metal foil film layer and a lower metal foil film layer, and the upper metal foil film layer and the lower metal foil film layer are fixedly connected as a whole. Compared with the existing single-sided or double-sided non-conducting metal foil film belt, by using the double-sided conducting metal foil film belt to coat a core wire, the core wire can be completely shielded by metal, and the high-frequency shielding effect is better; and meanwhile, the double-sided conducting metal foil film belt is of higher toughness and is more applicable to cables with small diameter, the EMI and VSWR (Standing Wave Ratio) are improved, the bandwidth is extended, and the stability of product performance is improved. As the manufacturing process of the double-sided conducting metal foil film belt is simpler than that of the existing double-sided conducting metal foil film belt, the consumption of metal resources on a cable of unit length is reduced, and the production cost is reduced. The invention further provides a cable employing the double-sided conducting metal foil film belt.

Description

technical field [0001] The invention relates to the technical field of cable shielding and transmission, in particular to a double-sided conduction metal foil tape for the shielding layer of a data signal transmission line, and a cable using the double-side conduction metal foil film tape. Background technique [0002] In the production of transmission cables, in order to improve the anti-EMI performance, it is generally necessary to set up a shielding layer for the realization of circuit composition and electromagnetic shielding performance. [0003] Taking a coaxial cable as an example, the existing coaxial cable generally includes a central conductor and a shielding layer, an insulating medium is filled between the conductor and the shielding layer, and a sheath is wrapped around the shielding layer. [0004] The common form of shielding layer is tape, braid, winding, corrugated tube or a combination of these forms, and the most common form of tape shielding layer is meta...

Claims

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Application Information

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IPC IPC(8): H01B7/04H01B7/17H01B11/06
CPCH01B7/04H01B7/17H01B11/06
Inventor 魏代利
Owner DONGGUAN LANMU MATERIAL TECH
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