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CN-122025276-A - Seven-class cable

CN122025276ACN 122025276 ACN122025276 ACN 122025276ACN-122025276-A

Abstract

The invention discloses a seven-class cable, and belongs to the technical field of communication cables. The cable protection sleeve comprises a cable protection sleeve, a graphene foaming liquid crystal polymer framework, a plurality of twisted pairs and wave-absorbing foam, wherein the graphene foaming liquid crystal polymer framework is axially arranged inside the cable protection sleeve and divides the inside of the cable protection sleeve into a plurality of independent accommodating cavities, the twisted pairs are correspondingly accommodated in the plurality of accommodating cavities respectively, and the wave-absorbing foam is filled in the accommodating cavities. Compared with the prior art, the graphene foaming liquid crystal polymer skeleton is arranged in the cable protective sleeve, so that the inner space is divided into a plurality of independent accommodating cavities, and each pair of twisted pairs is physically isolated, thereby being beneficial to reducing electromagnetic coupling among the pairs and reducing the influence of internal crosstalk.

Inventors

  • ZHANG HAITAO
  • Mo Huan
  • PENG ZHIQIANG
  • ZHAO GUIDE

Assignees

  • 金环宇电缆集团有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. A seven-class cable comprising: A cable protective sleeve (1); the graphene foaming liquid crystal polymer framework (2) is axially arranged inside the cable protection sleeve (1) and divides the inside of the cable protection sleeve (1) into a plurality of independent accommodating cavities; a plurality of pairs of twisted pairs (3) are correspondingly accommodated in the accommodating cavities respectively; And the wave-absorbing foam (4) is filled in the accommodating cavity.
  2. 2. The seven-category cable of claim 1, further comprising: The double-sided graphene aluminum-plastic composite belt (31) is longitudinally wrapped on the periphery of each pair of twisted pairs (3), and the double-sided graphene aluminum-plastic composite belt (31) sequentially comprises a first graphene coating layer (311), a second bonding layer (312), a third aluminum foil layer (313) and a fourth graphene coating layer (314) from inside to outside.
  3. 3. The seven-category cable according to claim 1, characterized in that the cable protection sleeve (1) comprises a graphene shielding layer (11) and an outer sheath (12), the graphene shielding layer (11) is wrapped around the periphery of the graphene foamed liquid crystal polymer skeleton (2), and the outer sheath (12) is extruded around the periphery of the graphene shielding layer (11).
  4. 4. A seven-category cable according to claim 3, characterized in that the outer surface of the graphene shield layer (11) is locally coated with a conductive glue layer for electrical connection with the ground terminal of the connector.
  5. 5. A seven-category cable according to claim 3, characterized in that the graphene shield layer (11) is wrapped by a multi-layer graphene composite tape, which is a cellular porous structure.
  6. 6. The seven-category cable according to claim 1, characterized in that each pair of twisted pairs (3) comprises a solid copper conductor (32) and an insulation layer (33) coated on the outer surface of the solid copper conductor (32), the insulation layer (33) being a three-layer co-extruded polyolefin insulation layer (33) consisting of an inner solid skin layer (331), an intermediate foamed layer (332) and an outer solid skin layer (333).
  7. 7. Seven types of cables according to claim 1, characterized in that the graphene-foamed liquid crystal polymer skeleton (2) comprises one central frame body (21) and a plurality of separating arms (22) extending radially outwards from the central frame body (21), and in that the central axis of the graphene-foamed liquid crystal polymer skeleton (2) coincides with the central axis of the cable.
  8. 8. Seven-category cable according to claim 1, characterized in that the graphene-foamed liquid crystal polymer skeleton (2) is of microporous foamed structure, and in that the graphene conductive phase is uniformly embedded inside.
  9. 9. Seven-category cable according to claim 1, characterized in that the twisted pairs (3) accommodated in the plurality of accommodation cavities have respectively mutually different pitches.
  10. 10. Seven-class cable according to claim 1, characterized in that the wave-absorbing foam (4) is based on flexible polymeric foam and the magnetic filler is uniformly dispersed inside the matrix.

Description

Seven-class cable Technical Field The invention relates to the technical field of communication cables, in particular to a seven-type cable. Background With the rapid development of big data, cloud computing and tera ethernet technology, the demands of the fields of data centers, industrial communication, high-end comprehensive wiring and the like for high-speed, stable and anti-interference network transmission cables continue to increase. Seven types of cables (Category 7 cable) are widely used in such application scenarios as twisted pair cables supporting 600MHz transmission frequency and 10Gbps transmission rate. In high-speed data transmission, cross talk (crosstalk) between pairs is one of the main factors affecting signal integrity and transmission quality. Crosstalk refers to signal interference between adjacent pairs of lines due to electromagnetic coupling, and includes near-end crosstalk (NEXT) and far-end crosstalk (FEXT). With the increase of the transmission frequency (such as 600 MHz), the wavelength of the electromagnetic wave becomes shorter, the electromagnetic coupling effect between the pair of wires is enhanced, and the crosstalk problem becomes more serious. Disclosure of Invention The invention aims to provide a seven-class cable, which solves the technical problem that the existing seven-class cable has serious line pair crosstalk during high-frequency transmission, thereby improving the purity and reliability of signal transmission. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a seven-class cable which comprises a cable protective sleeve, a graphene foaming liquid crystal polymer framework, a plurality of twisted pairs and wave-absorbing foam, wherein the graphene foaming liquid crystal polymer framework is axially arranged inside the cable protective sleeve and divides the inside of the cable protective sleeve into a plurality of independent accommodating cavities, the twisted pairs are correspondingly accommodated in the plurality of accommodating cavities respectively, and the wave-absorbing foam is filled in the accommodating cavities. According to one embodiment of the invention, the double-sided graphene aluminum-plastic composite belt is longitudinally wrapped on the periphery of each pair of twisted pairs, and comprises a first graphene coating layer, a second bonding layer, a third aluminum foil layer and a fourth graphene coating layer from inside to outside in sequence. According to one embodiment of the invention, the cable protection sleeve comprises a graphene shielding layer and an outer sheath, wherein the graphene shielding layer is wrapped on the periphery of the framework, and the outer sheath is extruded on the periphery of the graphene shielding layer. According to one embodiment of the invention, the outer surface of the graphene shielding layer is partially coated with a conductive adhesive layer for electrical connection with a ground terminal of the connector. According to one embodiment of the invention, the graphene shielding layer is formed by wrapping a plurality of layers of graphene composite tapes, and the graphene composite tapes are of honeycomb porous structures. According to one embodiment of the invention, each pair of twisted pairs comprises a solid copper conductor and an insulating layer coated on the outer surface of the solid copper conductor, wherein the insulating layer is a three-layer co-extrusion polyolefin insulating layer consisting of an inner solid skin layer, an intermediate foaming layer and an outer solid skin layer. According to one embodiment of the invention, the graphene foamed liquid crystal polymer skeleton comprises a central frame body and a plurality of separation arms which extend outwards from the central frame body in a radiation mode, and the central axis of the graphene foamed liquid crystal polymer skeleton coincides with the central axis of the cable. According to one embodiment of the invention, the graphene foaming liquid crystal polymer skeleton is of a microporous foaming structure, and a graphene conductive phase is uniformly embedded in the graphene foaming liquid crystal polymer skeleton. According to one embodiment of the present invention, the twisted pairs accommodated in the accommodating chambers have different pitches from each other. According to one embodiment of the invention, the wave-absorbing foam takes flexible polymer foam as a matrix, and magnetic fillers are uniformly dispersed in the matrix. The beneficial effects of the invention at least comprise: Through set up graphene foaming liquid crystal polymer skeleton in cable protective sheath inside, separate into a plurality of independent accommodation chamber with the inner space, make each pair twisted pair by physical isolation to help reducing the electromagnetic coupling between the pair, reduce the influence of inside crosstalk. Meanwhile, the wave-absorbing foam is