CN219497393U

CN219497393U - Light heat-resistant differential signal flat cable

Info

Publication number: CN219497393U
Application number: CN202320490740.2U
Authority: CN
Inventors: 江平; 黄建卫; 蔡长威; 刘书鑫
Original assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-08-08
Anticipated expiration: 2033-03-15

Abstract

The utility model discloses a light heat-resistant differential signal flat cable which comprises two inner conductors which are arranged side by side at intervals and are coated in a foaming PFA inner insulating layer together, wherein the outer surface of each inner conductor is coated with a heat-resistant isolation layer, the heat-resistant isolation layer is a cylindrical supporting net body formed by mutually reverse spiral winding and braiding of inner and outer double-layer aramid fiber twisted wires, a plurality of polyacrylonitrile-based carbon fibers are uniformly distributed on the supporting net body in the circumferential direction, and the outer part of the foaming PFA inner insulating layer is sequentially coated with an ETFE outer insulating layer, a PPS conductive fiber shielding layer and an oval fluorine resin extrusion outer sheath. The cable is required based on light preparation, has excellent heat resistance, ensures the stability of signal transmission characteristics and has better durability.

Description

Light heat-resistant differential signal flat cable

Technical Field

The utility model relates to the technical field of cables, in particular to a light heat-resistant differential signal flat cable.

Background

Shielded cables are used in high speed data transmission applications, and electrical signals routed through the shielded cable pathway may radiate less EMI/RFI to the external environment than electrical signals routed through unshielded cables. The electrical signals transmitted through the shielded cable may be better protected from environmental EMI/RFI than signals through the unshielded cable. The signal conductors of the shielded electrical cable are typically arranged in pairs to communicate differential signals. However, in general differential signal cables, a foamed resin insulating layer such as foamed polyethylene, foamed fluororesin insulating layer, etc. is often used, and when a conductor generates heat, the insulating layer is easily deformed and deteriorated, the insulating performance is deteriorated, the transmission characteristics are unstable, the electrical characteristics of the cable are greatly affected, and the durability is poor.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide the light heat-resistant differential signal flat cable which is required by preparation based on light weight, has excellent heat resistance, ensures the stability of signal transmission characteristics and has better durability.

The utility model solves the technical problems through the following technical proposal.

The utility model provides a light heat-resistant differential signal flat cable, includes two inner conductors of side by side interval arrangement and cladding in foaming PFA inner insulation layer jointly, inner conductor surface cladding has heat-resistant isolation layer, heat-resistant isolation layer is inside and outside double-deck aramid fiber twisted yarn each other and is reverse spiral winding package and weave and form the cylinder support net body, a plurality of polyacrylonitrile base carbon fiber have evenly been laid to circumference on the support net body, the outside cladding in proper order of foaming PFA inner insulation layer has ETFE outer insulation layer, PPS conductive fiber shielding layer and oval fluororesin extrusion package oversheath.

Preferably, the inner conductor is formed by twisting a plurality of tinned copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fiber yarns.

Preferably, the inner conductor lay length is 5 to 15 times the outer diameter of the inner conductor.

Preferably, the diameter of the tinned copper monofilament is 0.01mm to 0.04mm.

Preferably, the PPS conductive fiber shielding layer is a conductive fiber bundle spiral winding structure, and the conductive fiber bundle is formed by twisting a plurality of PPS fibers and coating a copper conductive coating.

Preferably, the PPS conductive fiber shielding layer has a shielding density of 90% to 95%.

Preferably, the heat-resistant insulation layer has a thickness of 0.03mm to 0.15mm.

Preferably, the length-axis ratio of the fluororesin extrusion outer sheath is 1.25:1 to 1.5:1.

Preferably, an EVA adhesive layer is arranged on the inner surface of the fluororesin extrusion outer sheath.

Preferably, the thickness of the fluororesin extrusion coating outer sheath is 0.45mm to 1.8mm.

The utility model has the beneficial effects that:

1. the heat-resistant isolation layer is added on the outer surface of the inner conductor, and is formed by weaving aramid yarn and polyacrylonitrile-based carbon fiber with excellent heat resistance, so that the heat stability is excellent while the flexibility of the inner conductor is increased, the heat conduction to the insulating layer when the inner conductor heats is effectively prevented, the heat resistance and the heat dissipation of the cable are improved, the deformation, the degradation and the performance deterioration of the insulating layer are effectively prevented, the stability of the transmission characteristic is ensured, the service life is prolonged, and the durability is better.

2. The PPS conductive fiber shielding layer is favorable for light weight production, the shielding density is 90-95%, interference from external signals can be effectively restrained, the low-voltage differential signal transmission rate and the signal transmission stability are ensured, and the stable and reliable electrical characteristics of the cable are ensured.

3. The inner conductor is formed by twisting tin-plated copper monofilaments and para-type wholly aromatic copolyamide drawn fiber yarns, the para-type wholly aromatic copolyamide drawn fiber yarns improve the tensile strength of the inner conductor, the bending resistance is improved, the yarns and the cores are not easy to break, and the inner conductor is durable to use.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model.

In the figure: the heat-resistant composite material comprises a 1-inner conductor, a 2-heat-resistant isolation layer, a 3-foaming PFA inner insulating layer, a 4-ETFE outer insulating layer, a 5-PPS conductive fiber shielding layer and a 6-fluororesin extrusion outer sheath.

Detailed Description

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1, the lightweight heat-resistant differential signal flat cable according to the embodiment of the present utility model includes two inner conductors 1 arranged side by side at intervals and jointly coated in a foamed PFA inner insulating layer 3, specifically, the inner conductors 1 are formed by twisting a plurality of tinned copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fiber filaments, for example, the wire diameter of the tinned copper monofilaments is 0.01mm to 0.04mm, and further, the twisting pitch of the inner conductors 1 is 5 to 15 times the outer diameter of the inner conductors 1. The heat-resistant insulation layer 2 is coated on the outer surface of the inner conductor 1, the heat-resistant insulation layer 2 is a cylindrical support net body formed by mutually reverse spiral wrapping and braiding of inner and outer double-layer aramid twisted wires, a plurality of polyacrylonitrile-based carbon fibers are uniformly distributed on the circumferential direction of the support net body, and further, the thickness of the heat-resistant insulation layer 2 is 0.03mm to 0.15mm. The outer portion of the foaming PFA inner insulating layer 3 is sequentially coated with an ETFE outer insulating layer 4, a PPS conductive fiber shielding layer 5 and an oval-shaped fluororesin extrusion outer sheath 6, and further, the inner surface of the fluororesin extrusion outer sheath 6 is provided with an EVA bonding layer. In one embodiment, the PPS conductive fiber shielding layer 5 is a conductive fiber bundle spiral winding structure, the conductive fiber bundle is formed by twisting a plurality of PPS fibers and coating copper conductive coating, and further, the PPS conductive fiber shielding layer 5 has a shielding density of 90% to 95%. The length-axis ratio of the fluororesin extrusion outer sheath 6 is 1.25:1 to 1.5:1. The thickness of the fluororesin extrusion outer sheath 6 is 0.45mm to 1.8mm.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. Light heat-resistant differential signal flat cable, characterized by: including two inner conductors (1) of side by side interval arrangement and cladding in foaming PFA inner insulation layer (3) jointly, inner conductor (1) surface cladding has heat-resisting isolation layer (2), heat-resisting isolation layer (2) are inside and outside double-deck aramid fiber twisted wire each other and are reverse spiral package and weave formation cylinder support web body, a plurality of polyacrylonitrile-based carbon fiber have evenly been laid to circumference on the support web body, foaming PFA inner insulation layer (3) outside cladding has ETFE outer insulation layer (4), PPS conductive fiber shielding layer (5) and oval fluororesin crowded package oversheath (6) in proper order.

2. The lightweight, heat resistant differential signaling flat cable of claim 1, wherein: the inner conductor (1) is formed by twisting a plurality of tinned copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fiber yarns.

3. The lightweight, heat resistant differential signaling flat cable of claim 2, wherein: the inner conductor (1) has a lay length of 5 to 15 times the outer diameter of the inner conductor (1).

4. The lightweight, heat resistant differential signaling flat cable of claim 2, wherein: the diameter of the tinned copper monofilament is 0.01mm to 0.04mm.

5. The lightweight, heat resistant differential signaling flat cable of claim 1, wherein: the PPS conductive fiber shielding layer (5) is of a conductive fiber bundle spiral winding structure, and the conductive fiber bundles are formed by twisting a plurality of PPS fibers and coating copper conductive coatings.

6. The lightweight, heat resistant differential signaling flat cable of claim 5, wherein: the shielding density of the PPS conductive fiber shielding layer (5) is 90-95%.

7. The lightweight, heat resistant differential signaling flat cable of claim 1, wherein: the thickness of the heat-resistant isolation layer (2) is 0.03mm to 0.15mm.

8. The lightweight, heat resistant differential signaling flat cable of claim 1, wherein: the length-axis ratio of the fluororesin extrusion outer sheath (6) is 1.25:1 to 1.5:1.

9. The lightweight, heat resistant differential signaling flat cable of claim 1, wherein: the inner surface of the fluororesin extrusion outer sheath (6) is provided with an EVA bonding layer.

10. The lightweight, heat resistant differential signaling flat cable of claim 1, wherein: the thickness of the fluororesin extrusion outer sheath (6) is 0.45mm to 1.8mm.