CN211319761U

CN211319761U - Communication shielded cable

Info

Publication number: CN211319761U
Application number: CN201922486978.4U
Authority: CN
Inventors: 王鸿林; 王志良
Original assignee: Suzhou Donglihong Electronics Technology Co ltd
Current assignee: Suzhou Donglihong Electronics Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-21
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a communication shielded cable, including the inside PTFE heart yearn that possesses a plurality of leads the core, the seamless winding in periphery of PTFE heart yearn has the shielding film area, and the winding layer periphery that the shielding film was taken is equipped with the PVC protective sheath, and wherein, the shielding film area is taken for the compound shielding film area by copper foil and PI membrane hot pressing composite forming, is the hot melt rigid coupling between PI membrane and the PTFE heart yearn. The utility model discloses the shielding effect is showing, satisfies 5G communication shielded cable's demand, replaces the wicking copper metal braided sleeve through the shielding film area, has greatly reduced the cable cost. The winding layer is formed by the outer periphery wrapping sections which are spliced in a continuous overlapping mode, the production process cost is reduced, meanwhile, the insulating layer and the conducting layer of the winding layer are continuously matched, the transmission efficiency of an interference signal source is improved, and meanwhile, the insulation blocking performance is ensured. Possess the protective layer design, can increase the firm stability on winding layer, possess corrosion-resistant isolation demand simultaneously, prolonged communication shielded cable's life.

Description

Communication shielded cable

Technical Field

The utility model relates to a communication shielded cable belongs to shielded cable's technical field.

Background

The advent of 5G networks has had a significant impact on critical components, particularly connectors and cables used in wireless and wired infrastructures. Recently, the united states and the united kingdom have announced an acceleration in 5G network development, which has injected energy into the entire network industry. Today, western economies are trying to compete with the 5G technology that was intensively introduced in china.

However, achieving this leap on a large scale will depend on the adoption of new cable technology. Worldwide, copper-based mobile backhaul architectures are being upgraded to packet transmission over fiber architectures. Optical cables can transmit higher bandwidths and are therefore indispensable configurations for the processing speed of future 5G network products. Small base stations, new equipment and products, etc. that match 5G networks must be able to handle higher speeds and densities while reducing delays, consuming less energy, generating less heat, etc. Among them, the shielding performance of the cable is very strict.

Traditionally, communication shielded cable adopts PTFE heart yearn and PVC protective sheath, has designed the metal braid cover between PTFE heart yearn and PVC protective sheath, and the metal braid cover adopts the tin copper that soaks to handle, and this shielded cable's cost is higher, and shielding nature is relatively poor, and the diameter is also great, is unfavorable for cable laying.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the not enough of above-mentioned prior art, to the higher and relatively poor problem of shielding nature of traditional shielded cable manufacturing cost, provide a communication shielded cable.

In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:

a communication shielded cable comprises a PTFE core wire with a plurality of guide cores inside, a shielding film belt is seamlessly wound on the periphery of the PTFE core wire, a PVC protective sleeve is arranged on the periphery of a winding layer of the shielding film belt,

the shielding film belt is a composite shielding film belt formed by hot-pressing a copper foil and a PI film in a composite mode, and the PI film is fixedly connected with the PTFE core wire in a hot-melting mode.

Preferably, the shielding film belt is composed of a plurality of sequentially spliced peripheral wrapping sections, the copper foil of any peripheral wrapping section is staggered with the PI film, the PI films of adjacent peripheral wrapping sections are overlapped, and the copper foils are overlapped,

the two free ends of any of the peripheral wrapping sections overlap.

Preferably, a protective layer is arranged between the periphery of the winding layer and the PVC protective sleeve.

Preferably, the protective layer is an acrylic protective agent sprayed on the outer circumference of the winding layer.

Preferably, the thickness of the copper foil is 7-20 μm, and the thickness of the PI film is 8-25 μm.

The beneficial effects of the utility model are mainly embodied in that:

1. the shielding effect is showing, satisfies 5G communication shielded cable's demand, replaces the wicking copper metal braided sleeve through the shielding film area, has greatly reduced the cable cost.

2. The winding layer is formed by the outer periphery wrapping sections which are spliced in a continuous overlapping mode, the production process cost is reduced, meanwhile, the insulating layer and the conducting layer of the winding layer are continuously matched, the transmission efficiency of an interference signal source is improved, and meanwhile, the insulation blocking performance is ensured.

3. Possess the protective layer design, can increase the firm stability on winding layer, possess corrosion-resistant isolation demand simultaneously, prolonged communication shielded cable's life.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of the communication shielded cable of the present invention.

Fig. 2 is a schematic sectional view of the communication shielded cable of the present invention.

Detailed Description

The utility model provides a communication shielded cable. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings so as to be easier to understand and grasp.

The utility model provides a communication shielded cable, as shown in fig. 1 and 2, includes that inside possesses a plurality of PTFE heart yearns 2 of leading core 1, the seamless winding of the periphery of PTFE heart yearn 2 has shielding film to take 3, and the winding layer periphery that shielding film took 3 is equipped with PVC protective sheath 4.

The shielding film belt 3 is a composite shielding film belt formed by hot-pressing and compounding a copper foil 5 and a PI film 6, and the PI film 6 is fixedly connected with the PTFE core wire 2 in a hot melting mode.

Specifically, the composite shielding film belt is adopted to replace the traditional tin-impregnated copper metal braided sleeve, so that the cost of the shielding layer is effectively reduced, the diameter of the communication cable is controlled, and the shielding effect is better.

In addition, the PI film is adopted as the copper foil base band, so that the flexibility and the strength of the composite shielding film band can be increased, the copper foil 5 is not easy to damage, and the stable quality of the communication cable is ensured. It should be noted that, an auxiliary adhesive is provided between the copper foil and the PI film during the hot-pressing composite molding, which belongs to the prior art and is not described herein again.

In a specific embodiment, the shielding film strip 3 is composed of a plurality of sequentially spliced peripheral wrapping sections 7, the copper foil 5 of any peripheral wrapping section 7 is staggered with the PI film 6, the PI films 6 and the copper foils 5 of adjacent peripheral wrapping sections are overlapped, and two free ends of any peripheral wrapping section 7 are overlapped.

Specifically, as is well known, the shielding film tape 3 is used for grounding operation, that is, external interference signals are grounded by the shielding film tape 3 to play a role in interference resistance, and conventionally, the shielding film tape 3 is processed by adopting a spiral winding mode, on one hand, the processing cost of spiral winding is high, on the other hand, a small overlapping part exists between the shielding film tapes 3 after the spiral winding, the overlapping part is overlapped by an insulating film and a conductive film, a certain signal passing gap exists, the shielding effect is greatly influenced, on the other hand, the conductive film of the spiral winding has a long stroke, high resistance, low transmission efficiency for the interference signals, and the interference risk is increased.

In the present case, adopt the production technology of a plurality of periphery parcel sections 7, the marching type carries out the parcel of periphery parcel section 7 promptly, and every section periphery parcel section 7 all has certain free end overlap area, effectively reduces signal interference, and the technology of segmentation parcel has effectively reduced manufacturing cost. In addition, the peripheral wrapping sections 7 are in staggered butt joint, namely the PI films 6 are overlapped and the copper foils 5 are overlapped, so that the insulating layers are connected into a whole, the conducting layers are connected into a whole, the insulating property requirement can be met, meanwhile, the copper foils 5 of a plurality of sections are in conduction connection, interference signals are easy to conduct away from transmission, and the shielding effect is obvious.

In one embodiment, a protective layer 8 is provided between the outer periphery of the wrapping and the PVC protective sleeve 4. The protective layer 8 is an acrylic acid protective agent sprayed on the outer periphery of the winding layer.

The specific implementation process and principle are described as follows:

firstly, a PTFE material is wrapped on a guide core 1 to form a PTFE core wire 2, and the forming process belongs to the prior art.

And then, carrying out heat wrapping on the shielding film belt 3 by using wrapping equipment, and overlapping the PI films 6 and the copper foils 5 of each peripheral wrapping section 7 in a stepping segmented wrapping mode to form a winding layer. The PI film and the PTFE are compounded by hot melting, and a high molecular adhesive can be added. This composition is prior art and will not be described further herein.

And spraying an acrylic acid protective agent on the winding layer, baking and curing, and finally forming the PVC protective sleeve 4 by an extruder.

Can increase periphery parcel section 7 and the reinforcing effect of mutually supporting on the one hand through this acrylic acid protective agent, on the other hand can protect the winding layer, plays corrosion-resistant and seal the effect that separates the air, prevents that invasion such as outside moisture from producing the damage to the winding layer behind PVC protective sheath 4 and the inner core production clearance, has prolonged communication shielded cable's life.

In one embodiment, the copper foil is rolled copper with a thickness of 7-20 μm and the PI film has a thickness of 8-25 μm. The shielding film strip 3 in the size range meets the shielding requirement of the 5G communication shielding cable.

Can discover through the above description, the utility model discloses a communication shielded cable shielding effect is showing, satisfies 5G communication shielded cable's demand, replaces the wicking copper metal braided sleeve through the shielding film area, has greatly reduced the cable cost. The winding layer is formed by the outer periphery wrapping sections which are spliced in a continuous overlapping mode, the production process cost is reduced, meanwhile, the insulating layer and the conducting layer of the winding layer are continuously matched, the transmission efficiency of an interference signal source is improved, and meanwhile, the insulation blocking performance is ensured. Possess the protective layer design, can increase the firm stability on winding layer, possess corrosion-resistant isolation demand simultaneously, prolonged communication shielded cable's life.

The above technical solutions of the present invention have been fully described, and it should be noted that the present invention is not limited by the above description, and all technical solutions formed by equivalent transformation or equivalent transformation adopted by the spirit of the present invention in the aspects of structure, method or function by those of ordinary skill in the art all fall within the protection scope of the present invention.

Claims

1. A communication shielded cable, comprising:

comprises a PTFE core wire with a plurality of guide cores inside, a shielding film belt is seamlessly wound on the periphery of the PTFE core wire, a PVC protective sleeve is arranged on the periphery of a winding layer of the shielding film belt,

2. The shielded electrical communication cable of claim 1, wherein:

the shielding film belt is composed of a plurality of sequentially spliced peripheral wrapping sections, the copper foil of any peripheral wrapping section is staggered with the PI film, the PI films of adjacent peripheral wrapping sections are overlapped, and the copper foils are overlapped,

the two free ends of any of the peripheral wrapping sections overlap.

3. The shielded electrical communication cable of claim 2, wherein:

the winding layer periphery with be equipped with the protective layer between the PVC protective sheath.

4. A communications shielded cable according to claim 3, wherein:

the protective layer is an acrylic acid protective agent sprayed on the periphery of the winding layer.

5. The shielded electrical communication cable of claim 1, wherein:

the thickness of the copper foil is 7-20 mu m, and the thickness of the PI film is 8-25 mu m.