TWM447579U - Signal transmission line in configuration with conductive plastic material layer - Google Patents

Description

Signal transmission line with conductive plastic material layer

This creation relates to the field of signal transmission lines, and specifically relates to the EMI protection of signal transmission lines.

With the development of modern electronic information technology, electromagnetic interference (EMI) is ubiquitous, it will directly or indirectly lead to electronic components, electrical equipment to generate erroneous control signals, or cause normal control signal interruption, in microelectronics products In the contemporary development of high speed, EMI protection is very important. At present, most of the signal transmission lines rely on the metal braid as a mask layer for EMI protection. The metal braid has high cost and is easy to corrode, and the mask effect is difficult to control.

In summary, the purpose of the present invention is to solve the problem that electromagnetic wave interference exists in the signal transmission line, and the EMI protection of the metal braid layer has high cost, easy corrosion, and difficulty in controlling the mask effect. A signal transmission line with a layer of conductive plastic material.

In order to solve the technical problem of the present invention, the technical solution adopted is: a signal transmission line provided with a conductive plastic material layer, wherein the signal transmission line includes at least one metal wire provided with an insulating layer, The outer surface of the metal wire of the insulating layer is provided with a layer of conductive plastic material, and an outer layer of insulating layer is further disposed outside the layer of conductive plastic material.

The technical solution further defined by the technical solution of the present invention includes: providing an isolation layer between the outer portion of the metal wire of the insulating layer and the conductive plastic material layer.

The isolation layer is a metal foil isolation layer or a non-metal isolation layer.

One or more grounding metal wires are disposed between the isolation layer and the conductive plastic material layer or in the isolation layer.

The metal foil isolating layer is composed of a metal foil shielding tape bundle.

The conductive plastic material layer has a surface resistivity of 100 to 1100 Ω/s.

The conductive plastic material layer is a conductive PVC, PE, TPU, TPE, PP, PC or ABS layer.

The conductive plastic material layer is an electromagnetic shielding grade material, and the composition thereof is a combination of a resin and a conductive carbon black. The conductive carbon black is: pore volume (DBP): 480-510 ml/100 g, particle diameter: less than 125 μm 7% w/w max, coarse particle content: 30 mg/kg max, humidity: 0.5% w/w max, volatile matter: 1.0% w/w max, iodine absorption value: 1000-1150 mg/g, ash content: 0.1% w/w max, pH: 8-10, bulk density: 100-120 kg/m3.

The utility model has the beneficial effects that the utility model adopts a conductive plastic material layer as a shielding layer for EMI protection, and the conductive plastic material is also called a conductive polymer plastic, which has better conductivity and antistatic property, and effectively solves the signal transmission line. The EMI protection problem, low production cost, easy processing, surface resistivity can be controlled according to the added conductive filler content.

The structure of the present invention will be further described below with reference to the accompanying drawings and preferred embodiments. Referring to FIG. 1, the present invention includes four metal wires 1 provided with an insulating layer 11 and a grounding wire 2, In the specific implementation process, the metal wires 1 provided with the insulating layer 11 are single or multiple, and four are taken as an example for illustration; the grounding wires 2 may also be single or multiple; as needed, it may also be selected. Set the grounding wire 2 or not the grounding wire 2. In the figure, a grounding wire is taken as an example.

A conductive plastic material layer 4 is disposed on the outside of the metal wire 1 and the ground wire 2 provided with the insulating layer 11, and the conductive plastic material layer 4 is a conductive PVC, PE, TPU, TPE, PP, PC or ABS layer. The conductive plastic material layer 4 is used for EMI protection and conducting static electricity, and the conductive plastic material is generally classified into an antistatic composite material (surface resistivity 109 to 1012 Ω/sq) and a static elimination composite material (surface resistivity 100 ～ according to the difference in surface resistivity). 1100 Ω / sq), conductive composite material (surface resistivity 100 ~ 1100 Ω / sq) and electromagnetic shielding grade material (surface resistivity 100 ~ 1100 Ω / sq), the conductive plastic material layer 4 of the present invention is selected as electromagnetic shielding grade material (surface resistivity: 100 to 1100 Ω/sq), the composition of which is a combination of a resin and a conductive carbon black, and the preferred embodiment of the conductive carbon black is: pore volume (DBP): 480-510 ml/100 g, particle size: less than 125 Micron 7% w/w max, coarse particle content: 30 mg/kg max, humidity: 0.5% w/w max, volatile matter: 1.0% w/w max, iodine absorption value: 1000-1150 mg/g, ash Parts: 0.1% w/w max, pH: 8-10, bulk density: 100-120 kg/m3. An insulating outer layer 5 for protecting the conductive plastic material layer 4 is further provided outside the conductive plastic material layer 4.

In the implementation process, the isolation layer 3 may be additionally disposed inside the conductive plastic material layer 4 on the outside of the metal wire 1 and the grounding wire 2 provided with the insulating layer 11; in the implementation process, the grounding wire 2 may be disposed in the isolation layer. 3, may also be disposed between the isolation layer 3 and the conductive plastic material layer 4; the isolation layer 3 is a metal foil isolation layer or a non-metal isolation layer. In order to facilitate the production process, the metal foil isolating layer or the non-metal isolating layer 3 may be an insulating layer composed of an aluminum foil shielding tape, a copper foil shielding tape or a cotton tape.

1. . . Metal wire

2. . . Ground wire

3. . . Isolation layer

4. . . Conductive plastic material layer

5. . . Insulating outer layer

11. . . Insulation

Figure 1 is a schematic cross-sectional view of the utility model.

1. . . Metal wire

2. . . Ground wire

3. . . Isolation layer

4. . . Conductive plastic material layer

5. . . Insulating outer layer

11. . . Insulation

Claims (7)

A signal transmission line provided with a conductive plastic material layer, characterized in that: the signal transmission line comprises at least one metal wire provided with an insulating layer, and a conductive plastic material layer is disposed outside the metal wire provided with the insulating layer, and is electrically conductive The outer layer of the plastic material layer is also provided with an insulating outer layer. The signal transmission line provided with the conductive plastic material layer according to claim 1, wherein an isolation layer is further disposed between the outer portion of the metal wire of the insulating layer and the conductive plastic material layer. The signal transmission line provided with the conductive plastic material layer according to claim 2, wherein the isolation layer is a metal foil isolation layer or a non-metal isolation layer. The signal transmission line provided with the conductive plastic material layer according to the second aspect of the invention is characterized in that: one or more grounding metal wires are disposed between the isolation layer and the conductive plastic material layer or in the isolation layer. The signal transmission line provided with the conductive plastic material layer according to claim 3, wherein the metal foil isolation layer is composed of a metal foil shielding tape bundle. The signal transmission line provided with the conductive plastic material layer according to claim 1, wherein the conductive plastic material layer has a surface resistivity of 100 to 1100 Ω/s. The signal transmission line provided with the conductive plastic material layer according to claim 1, wherein the conductive plastic material layer is a conductive PVC, PE, TPU, TPE, PP, PC or ABS layer.