CN102231303A

CN102231303A - Shielding digital communication cable

Info

Publication number: CN102231303A
Application number: CN 201110097445
Authority: CN
Inventors: 沈小平; 周洪鹏; 徐伟
Original assignee: Jiangsu Tongding Optic Electronic Stock Co Ltd
Current assignee: Tongding Interconnection Information Co Ltd; Jiangsu Tongding Optic Electronic Stock Co Ltd
Priority date: 2011-04-19
Filing date: 2011-04-19
Publication date: 2011-11-02
Anticipated expiration: 2031-04-19
Also published as: CN102231303B

Abstract

The invention relates to a shielding digital communication cable which comprises: a plurality of line pairs, a woven shield coating out of the line pairs, a sheath extruding out of the woven shield. Each line pair comprises two single lines which are intertwisted. Each single line is formed by a copper conductor and an insulating layer coating out of the copper conductor. Each line pair is longitudinally wrapped with a layer of one-side aluminum foil. Two ends of the aluminum foil are overlapped. A row streamline is arranged between a plurality of line pairs. The row streamline is tightly contacted with aluminum foil metal surfaces of the each line pair. In the invention, the shield can be further formed through longitudinally wrapping the line pairs with the aluminum foils and the row streamline is arranged between the line pairs so as to reach requirements of protective grounding and shield grounding. A problem of crosstalk in the line pairs can be effectively solved and effective signal transmission can be guaranteed.

Description

A kind of shielding cable for digital communication

Technical field

The present invention relates to a kind of telecommunication cable, relate in particular to a kind of novel shielding cable for digital communication.

Background technology

Along with the fast development of global IT application highway, the local area network (LAN) digital cable has obtained further large-scale application, and rapidly being doubled and redoubled and the access network technology leapfrogging growth of network technology proposed requirements at the higher level for the transmission of Information media.

Gigabit Ethernet can not satisfy the consumer wideband requirement, and 10,000,000,000 will become mainstream technology than Ethernet (10Gbps).Corresponding cable for digital communication needs from surpassing five classes (100Mbps), six classes (200Mbps) to seven classes (600Mbps), eight classes (1000Mbps) production development, key technology is how to solve cross-talk and attenuation problem, and the application just is being based on the improvement of carrying out under the above-mentioned background situation.

Summary of the invention

The present invention seeks to provide the telecommunication cable of a kind of effective reduction cross-talk and decay in order to overcome the deficiencies in the prior art.

For achieving the above object, the technical solution used in the present invention is: a kind of shielding cable for digital communication, comprise that a plurality of lines are right, be coated on the woven shield of described a plurality of line to periphery, extrusion molding is at the sheath of described woven shield periphery, each described line is to comprising the single line of two mutually stranded settings, every single line is made up of copper conductor and the insulating barrier that is coated on the copper conductor periphery, the externally vertical bag one deck of each described line single face aluminium foil, the both ends overlaid of described aluminium foil is provided with, a plurality of described lines between also be provided with drain wire, described drain wire and each line are to the closely contact mutually of last aluminum foil metal face.

Further, described aluminium foil two ends overlaid arc length partly accounts for whole line to 20%～50% of circumference.

Described aluminum foil thickness is 0.05-0.10mm.

Described line is to being four, and described drain wire is positioned at four centers that line is right, and each described line is mutually 90 degree to the aluminium foil opening part along the circle tangential direction, thereby reaches best shield effectiveness.

Described drain wire is copper cash or tinned wird, and its diameter is 0.4～0.6mm.

Described woven shield is that copper wire or tinned copper wire braiding form.

The insulating barrier of described single line is the skin foam skin structure, and it is made up of endothelium, foaming layer and crust, and described endothelium is made by low-density polyethylene material, and its thickness is 0.02-0.03mm; Described foaming layer is a physical blowing, and foam degrees is 50%-60%; Described crust is made by high-density polyethylene material, and its thickness is greater than 0.1mm, and insulating barrier can reduce the external diameter that insulate by adopting the skin foam skin structure, further improves product decay index.

Because the utilization of technique scheme; the present invention compared with prior art has following advantage: cable of the present invention further forms shielding by online externally vertical alclad paper tinsel; and online between lay drain wire; reach protective ground and bonding requirement; can effectively solve the problem of line, guarantee that signal effectively transmits a cross-talk.

Description of drawings

Accompanying drawing 1 be according to technical solution of the present invention concrete a kind of telecommunication cable of implementing;

Wherein: 1, line is right; 11, single line; 112, copper conductor; 111, insulating barrier; 1111, endothelium; 1112, physical blowing layer; 1113, crust; 21, drain wire; 22, aluminium foil; 23, woven shield; 3, sheath;

Embodiment

Below in conjunction with accompanying drawing, describe particular content of the present invention in detail for example:

Cable as described in Figure 1, it is made up of cable core, the screen 23 and the sheath 3 that are coated on the cable core.Wherein, cable core mainly is made of 1 four mutually stranded lines, each line to 1 by two single lines 11 even stranded forming mutually, every single line 11 is made up of solid copper wire 112 and the insulating barrier 111 that is coated on solid copper wire 112 peripheries, in the present embodiment, insulating barrier 111 structures are the skin foam skin structure, and promptly it is made up of endothelium 1111, foaming layer 1112 and crust 1113.Wherein, described endothelium 1111 is made by low-density polyethylene material (LDPE), and its thickness is 0.02-0.03mm; Described foaming layer 1112 is a physical blowing, and foam degrees is 50%-60%; Described crust 1113 is made by high-density polyethylene material (HDPE), and its thickness is greater than 0.1mm.Adopt the skin foam skin structure by insulating barrier, reduce the external diameter that insulate, improve product decay index.

The single face aluminium foil 21 that each described line is 0.05-0.10mm to 1 outer overlapping vertical bag one layer thickness, the line of four shieldings is arranged in order in the direction of the clock to 1, each line is provided with the aluminium foil 21 two ends overlaids on 1, and overlapping arc length accounts for whole line to 25% of circumference, and four lines are mutually 90 degree to aluminium foil 21 shielding opening part A along the circle tangential direction, to reach best shield effectiveness.

In the present embodiment, to 1 the center drain wire 21 that a diameter also is set is 0.4～0.6mm, right aluminium foil 21 metal coverings of described drain wire 21 and four lines contact, to guarantee protective ground and bonding requirement at four lines.

Described drain wire 21 and woven shield 23 are made by copper wire or tinned copper wire, and described sheath 3 thickness are 0.6mm-1.0mm, and it is formed by PVC material extrusion molding.

Present embodiment by online externally vertical alclad paper tinsel shielding, a drain wire is put at the center and cable core adds copper wire braid shielded mode, and by externally vertical alclad paper tinsel mask overlap rate of line and opening direction design, can effectively solve line to a cross-talk difficult problem.

More than specific embodiment of the present invention is illustrated and illustrates but the present invention is not only limited to above embodiment, is decided to be four to differing as line, all equivalent transformations of being done according to the present invention all should be within protection scope of the present invention.

Claims

1. one kind shields cable for digital communication, comprise that a plurality of lines are to (1), be coated on the woven shield (23) of described a plurality of line to (1) periphery, extrusion molding is at the sheath (3) of described woven shield (23) periphery, each described line comprises the single line (11) of two mutually stranded settings to (1), every single line (11) is made up of copper conductor (112) and the insulating barrier (111) that is coated on copper conductor (112) periphery, it is characterized in that: each described line is to (1) outer vertical bag one deck single face aluminium foil (22), the both ends overlaid of described aluminium foil (22) is provided with, also be provided with drain wire (21) between a plurality of described lines are to (1), described drain wire (21) closely contacts the aluminium foil on (1) (22) metal covering mutually with each line.

2. shielding cable for digital communication according to claim 1 is characterized in that: the arc length of described aluminium foil (22) two ends overlaid part accounts for whole line to 20%～50% of (1) circumference.

3. shielding cable for digital communication according to claim 1 and 2 is characterized in that: described aluminium foil (22) thickness is 0.05-0.10mm.

4. shielding cable for digital communication according to claim 3, it is characterized in that: described line is four to (1), described drain wire (21) is positioned at the center of four lines to (1), and each described line is mutually 90 degree to aluminium foil (22) opening part along the circle tangential direction.

5. shielding cable for digital communication according to claim 1 is characterized in that: described drain wire (21) is copper cash or tinned wird, and its diameter is 0.4～0.6mm.

6. shielding cable for digital communication according to claim 1 is characterized in that: described woven shield (23) is that copper wire or tinned copper wire braiding form.

7. shielding cable for digital communication according to claim 1, it is characterized in that: the insulating barrier (111) of described single line (11) is the skin foam skin structure, it is made up of endothelium (1111), foaming layer (1112) and crust (1113), described endothelium (1111) is made by low-density polyethylene material, and its thickness is 0.02-0.03mm; Described foaming layer (1112) is a physical blowing, and foam degrees is 50%-60%; Described crust (1113) is made by high-density polyethylene material, and its thickness is greater than 0.1mm.