WO2018121163A1

WO2018121163A1 - Flame retardant cable

Info

Publication number: WO2018121163A1
Application number: PCT/CN2017/113434
Authority: WO
Inventors: 杨政国; 贾健佳; 邹海鸥; 齐刚; 张丽红; 庞凯; 邱绍坤
Original assignee: 张家港特恩驰电缆有限公司
Priority date: 2016-12-26
Filing date: 2017-11-29
Publication date: 2018-07-05
Also published as: CN106653204A

Abstract

Provided is a flame retardant cable (10), comprising: a jacket (11) that is located outside and four sets of twisted wire pairs that are located inside the jacket (11) and are twisted in pair in different colors. The jacket (11) comprises an outer jacket (111) made of polyvinyl chloride or a low-smoke halogen-free material, and a flame-retardant layer (112) arranged adjacent to the outer jacket (111). Each twisted wire pair comprises: a first insulator (121), a first copper conductor (122) located in the first insulator (121), a second insulator (131) twisted in pair with the first insulator (121), and a second copper conductor (132) located in the second insulator (131). The cable of the scheme is covered or braided with a special flame retardant material, and the jacket (11) is provided with a special flame retardant property PVC or a special flame retardant property LSOH so that the data cable has a high fireproof performance in terms of flame retardant property.

Description

Flame retardant cable

Technical field

The invention belongs to the technical field of cables, and in particular relates to a flame-retardant cable.

Background technique

With the frequent occurrence of fire accidents, people continue to deepen their understanding of the dangers of wire and cable fires, and the requirements for the fire performance of wire and cable are getting higher and higher. The existing data cables are twisted-pair cable structure, copper conductor or other alloy conductor is used as the transmission carrier, and high-density polyethylene (HDPE) or foamed PE insulation is used. The cable is filled with PE frame, and the sheath is made of special flame retardant. Performance PVC or special flame retardant low smoke zero halogen (LSOH) material.

General test methods for cables in the current market under IEC 60332-3-24 ignition conditions: multiple bundled cable vertical flame burning test - Class C or GB/T 18380.35 cable or cable burning test under flame conditions : Vertically installed bundled wire and cable flame vertical spread test No. C can not pass effectively.

Therefore, it is necessary to design a new type of cable.

Summary of the invention

It is an object of the present invention to provide a flame-retardant cable having high fire resistance.

The present invention provides a flame-retardant cable comprising: an outer jacket, and four sets of twisted pairs located in the jacket and twisted by different colors; wherein the jacket comprises a polyvinyl chloride Or an outer sheath made of a low-smoke, halogen-free material, and a flame-retardant layer disposed adjacent to the outer sheath; each of the twisted wires includes: a first insulator, a first copper conductor located in the first insulator, a second insulator that is twisted with the first insulator, and a second copper conductor that is located within the second insulator.

Preferably, the first insulator and the second insulator are both made of high density polyethylene.

Preferably, the first insulator and the second insulator are different in color.

Preferably, the first insulator is provided with a color strip or a color ring of the same color of the second insulator.

Preferably, the four sets of twisted pairs are respectively: a first set of strands of the same color or the same color as the first color, and a second set of the same or different colors of the second color a second set of stranded strands, a third set of strands of a third color that is identical or different in color to the third color, and a fourth set of strands of the fourth color that are identical or different in color to the fourth color, wherein The first color, the second color, the third color, and the fourth color are all different.

Preferably, the flame retardant layer is located on an inner wall of the sheath.

Preferably, the cable further comprises: an insulating strip in a cross structure in the sheath, the insulating strip separating the four sets of twisted pairs from each other.

Preferably, the insulating strip is made of polyethylene.

The present invention also provides a flame retardant cable comprising a first cable and a second cable that are connected together.

The cable of the invention is coated or woven with a special flame retardant material, and the sheath has special flame retardant performance PVC or special flame retardant performance LSOH, so that the data cable has high fireproof performance on flame retardant.

DRAWINGS

1 is a schematic structural view of a first embodiment of a cable according to the present invention;

2 is a schematic structural view of a second embodiment of a cable according to the present invention;

3 is a schematic structural view of a third embodiment of a cable according to the present invention;

4 is a schematic structural view of a fourth embodiment of a cable according to the present invention;

Figure 5 is a schematic structural view of a fifth embodiment of the cable of the present invention;

6 is a schematic structural view of a sixth embodiment of a cable according to the present invention;

Figure 7 is a schematic structural view of a seventh embodiment of the cable of the present invention;

8 is a schematic structural view of an eighth embodiment of a cable according to the present invention;

9 is a schematic structural view of a ninth embodiment of a cable according to the present invention;

10 is a schematic structural view of a tenth embodiment of a cable according to the present invention;

11 is a schematic structural view of an eleventh embodiment of a cable of the present invention;

12 is a schematic structural view of a twelfth embodiment of a cable according to the present invention;

Figure 13 is a schematic structural view of a thirteenth embodiment of the cable of the present invention;

Figure 14 is a schematic structural view of a fourteenth embodiment of the cable of the present invention;

Figure 15 is a schematic view showing the structure of a fifteenth embodiment of the cable of the present invention.

detailed description

The invention will now be further described with reference to the drawings and embodiments.

The flame-retardant cable of the present invention can be used as a transmission network cable of a local area network wiring system.

FIG. 1 is a schematic structural view of a first embodiment of the present invention. The cable core of the cable is four pairs of horizontal twisted pair cables, and the cable serves as a multi-log data and a voice transmission cable. The present cable 10 includes a jacket 11 located outside, and four sets of twisted pairs located within the sheath 11 and twisted by different colors.

Wherein, the sheath 11 comprises an outer sheath 111 made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH), and is made of a special flame retardant material and The outer sheath 111 abuts the flame-retardant layer 112 provided. The flame-retardant layer 112 is located on the inner wall of the sheath 11.

The four sets of twisted pairs are respectively: a first set of strands 12 having the same color or the same color as the first color, and a second set of strands having the same color or the same color as the second color 13. A third group of strands 14 having a third color identical to or different from the third color, and a fourth set of strands 15 having a fourth color identical to or different from the fourth color, wherein The first color, the second color, the third color, and the fourth color are different. In this embodiment, the first color is blue, the second color is 梧 color, the third color is green, and the fourth color is plucking color. .

The first set of twisted pairs 12, the second set of twisted pairs 13, the third set of twisted pairs 14 and the fourth set of twisted pairs 15 each include: a first insulator 121 having a color, located in the first insulator 121 The first copper conductor 122, the second insulator 131 having a color and being opposed to the first insulator 121, and the second copper conductor 132 located in the second insulator 131. The first insulator 121 is provided with a color strip or a color ring of the same color of the second insulator 131; the first insulator 121 and the second insulator 131 are both made of high density polyethylene (HDPE). The first set of twisted pair 12, the second set of twisted pair 13, the third set of twisted pair 14 and the fourth set of twisted pair 15 are respectively twisted by different pitches, and the first set of twisted pairs 12, The two sets of twisted pairs 13, the third set of twisted pairs 14 and the fourth set of twisted pairs 15 are then further twisted into a cable 10.

The cable 10 satisfies 100 MHz data transmission performance.

Among them, the outer sheath 111 and the flame-retardant layer 112 each have high flame retardancy.

2 is a schematic structural view of a second embodiment of the present invention. The cable 20 shown in FIG. 2 is different from the cable 10 shown in FIG. 1 in that the cable 20 further includes a cross structure in the sheath 11. An insulating strip 1617 that isolates the first set of twisted pairs 12, the second set of twisted pairs 13, the third set of twisted pairs 14, and the fourth set of twisted pairs 15 from each other. Among them, the insulating strip 1617 of the cross structure is made of polyethylene, the crosstalk of the cross-structure insulating strip is greatly improved, and the cross-structure insulating strip 1617 is made of a special flame-retardant material, which has high resistance. Flammability.

Cable 20 meets the requirements for large beam-forming combustion tests and also meets the transmission frequency of 250 MHz.

The cable 20 satisfies 250 MHz data transmission performance.

3 is a schematic structural view of a third embodiment of the present invention. The cable 30 shown in FIG. 3 is composed of two cables as shown in FIG. 1, that is, the cable 30 includes a first cable 31 connected together and The second cable 32 is a connected jacket.

The cable 20 satisfies 100 MHz data transmission performance.

4 is a schematic structural view of a fourth embodiment of the present invention. The cable 40 shown in FIG. 4 is composed of two cables as shown in FIG. 2, that is, the cable 40 includes a first cable 41 connected together. And a second cable 42, the cable 40 is a connected jacket.

The cable 40 shown in FIG. 4 is different from the cable 30 shown in FIG. 3 in that the cable shown in FIG. 4 has an insulating strip in a cross structure.

This cable 30 satisfies 250 MHz data transmission performance.

FIG. 5 is a schematic structural view of a fifth embodiment of the present invention. The cable 50 shown in FIG. 5 is different from the cable 10 shown in FIG. 1 in that the sheath 51 of the cable 50 includes: an outer portion. a sheath 511, a flame-retardant layer 512 disposed adjacent to the outer sheath 511, a first shielding layer 513 disposed adjacent to the flame-retardant layer 512, and a first adjacent layer 513 and located inside the sheath 51 Second shield layer 514.

Wherein, the outer sheath 511 is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH), and the flame-retardant layer 512 is made of a special flame-retardant material, the first shielding layer 513 is a metal braid, and the second shield layer 514 is made of an aluminum-plastic composite tape.

The cable 50 satisfies 100 MHz data transmission performance.

FIG. 6 is a schematic structural view of a sixth embodiment of the present invention. The difference between the cable 50 shown in FIG. 6 and the cable shown in FIG. 5 is:

The sheath 52 of the cable 50 includes: an outer sheath 521 located outside, a flame-retardant layer 522 disposed adjacent to the outer sheath 521, a first shielding layer 523 disposed adjacent to the flame-retardant layer 522, and the same The first shielding layer 523 abuts the second cladding layer 524 disposed inside the jacket, and A ground line 525 is located between the first shield layer 523 and the second cladding layer 524.

Wherein, the outer sheath 521 is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH), and the flame-retardant layer 522 is made of a special flame-retardant material, the first shielding layer 523 is made of an aluminum-plastic composite tape, and the second cladding layer 524 is made of a polyester tape.

The cable 50 satisfies the 500 MHz data transmission performance.

FIG. 7 is a schematic structural view of a seventh embodiment of the present invention. The cable 50 shown in FIG. 7 is different from the cable shown in FIG. 5 in that the cable 50 further includes an insulation in a cross structure in the sheath 51. The strips 5657 are arranged in a crisscross pattern, and the strips 5657 isolate the first set of strands 52, the second set of strands 53, the third set of strands 54 and the fourth set of strands 55 from each other.

The sheath 51 of the cable 50 includes: an outer sheath 511 located outside, a flame-retardant layer 512 disposed adjacent to the outer sheath 511, a first shielding layer 513 disposed adjacent to the flame-retardant layer 512, and the same A shielding layer 513 abuts the second shielding layer 514 located inside the sheath 51.

Among them, the insulating strips 5657 are all made of polyethylene, and the crosstalk of the insulating strips 5657 is greatly improved, and the insulating strips 5657 can also be made of special flame retardant materials.

In other embodiments, the sheath of the cable includes: an outer sheath located at the outer portion, a flame-retardant layer disposed adjacent to the outer sheath, a first shielding layer disposed adjacent to the flame-retardant layer, and the first The second shielding layer disposed adjacent to the shielding layer and the first cladding layer disposed adjacent to the second shielding layer and located inside the sheath.

The outer sheath is made of flame retardant polyvinyl chloride (PVC) or special flame retardant low-smoke halogen-free material (LSZH), the flame-retardant layer is made of special flame-retardant material, and the first shielding layer is metal. The braided layer is made of an aluminum-plastic composite tape; the first cladding layer is made of a polyester tape.

The cable 50 satisfies the data transmission performance of 1200 MHz or less.

8 is a schematic structural view of an eighth embodiment of the present invention. The cable 60 shown in FIG. 8 is different from the cable shown in FIG. 1 in that the sheath 61 of the cable 60 includes: an outer sheath 611 located at the outer portion. A flame-retardant layer 612 disposed adjacent to the outer sheath 511 and a first shield layer 613 disposed adjacent to the flame-retardant layer 612 and located inside the sheath 61.

Wherein, the outer sheath 611 is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH), and the flame-retardant layer 612 is made of a special flame-retardant material, the first shielding layer 613 is a metal braid.

The first set of twisted pairs 62, the second set of twisted pairs 63, the third set of twisted pairs 64, and the fourth set of twisted pairs 65 each include: a first insulator 621 having a color, located in the first insulator 621 a first copper conductor 622, a second insulator 631 having a color and being twisted with the first insulator 621, and a second copper conductor 632 located in the second insulator 631, and the first insulator 621 and the second insulator 631 An outer second shield layer 641. Wherein, the second shielding layer 641 is made of an aluminum-plastic composite tape.

The four pairs of stranded wires are individually wrapped by the second shield layer 641.

Wherein, the first insulator 621 and the second insulator 631 are both made of high density polyethylene (HDPE) or foamed PE, and the second shielding layer 641 is made of an aluminum-plastic composite tape. The first set of twisted pairs 62, the second set of twisted pairs 63, the third set of twisted pairs 64, and the fourth set of twisted pairs 65 are all different. The first set of twisted pairs 62, the second set of twisted pairs 63, the third set of twisted pairs 64, and the fourth set of twisted pairs 65 are further twisted into a cable 60.

The cable 60 satisfies the data transmission performance of 1200 MHz or less.

9 is a schematic structural view of a ninth embodiment of the present invention. The cable 60 shown in FIG. 9 is different from the cable shown in FIG. 8 in that the first shield layer 614 inside the sheath 61 is made of an aluminum-plastic composite tape. production. The cable 60 also includes a ground wire 66 located within the jacket 61 between the two adjacent stranded wires and the jacket 61.

The first set of twisted pairs 62, the second set of twisted pairs 63, the third set of twisted pairs 64, and the fourth set of twisted pairs 65 each include: a first insulator 621 having a color, located in the first insulator 621 a first copper conductor 622, a second insulator 631 having a color and having the first insulator 621 twisted, and a second copper conductor 632 located in the second insulator 631, and being located outside the first insulator 621 and the second insulator 631 The second shielding layer 641.

Wherein, the second shielding layer 641 is made of an aluminum-plastic composite tape. Wherein, the first insulator 621 and the second insulator 631 are both made of high density polyethylene (HDPE) or foamed PE, and the second shielding layer 641 is made of an aluminum-plastic composite tape. The first set of twisted pairs 62, the second set of twisted pairs 63, the third set of twisted pairs 64 and the fourth set of twisted pairs 65 are all twisted by different pitches, the first set of twisted pairs 62, the first The two sets of twisted pairs 63, the third set of twisted pairs 64, and the fourth set of twisted pairs 65 are then collectively twisted into a cable 60.

In other embodiments, the ground wire is disposed intermediate the spaces formed by the first set of twisted pairs 62, the second set of twisted pairs 63, the third set of twisted pairs 64, and the fourth set of twisted pairs 65.

The cable 60 satisfies the data transmission performance of 1200 MHz or less.

10 is a schematic structural view of a tenth embodiment of the present invention. The cable 60 shown in FIG. 10 is different from the cable shown in FIG. 9 in that the sheath 61 of the cable 60 includes an outer sheath 611 located at the outer portion. A flame-retardant layer 612 disposed adjacent to the outer sheath 511 and a first shield layer 613 disposed adjacent to the flame-retardant layer 612 and located inside the sheath 61.

Wherein, the outer sheath 611 is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH), and the flame-retardant layer 612 is made of a special flame-retardant material, the first shielding layer 613 is made of aluminum-plastic composite tape.

The cable 60 also includes a ground wire 66 located within the jacket 61 between the two adjacent stranded wires and the jacket 61.

The first set of twisted pairs 72, the second set of twisted pairs 73, the third set of twisted pairs 74, and the fourth set of twisted pairs 75 each include: a first insulator 721 having a color, located within the first insulator 721 a first copper conductor 722, a second insulator 731 having a color and being twisted with the first insulator 721, and a second copper conductor 732 located in the second insulator 731, and the first insulator 721 and the second insulator 731 The outer second shield layer 741.

The cable 60 satisfies the data transmission performance of 1200 MHz or less.

11 is a schematic structural view of an eleventh embodiment of the present invention. The cable 70 shown in FIG. 11 is different from the cable shown in FIG. 9 in that the sheath 71 of the cable 70 includes an outer sheath located at the outer portion. 711, and a flame-retardant layer 712 disposed adjacent to the outer sheath 711 and located inside the sheath 71. The sheath 71 is not provided with a shielding layer.

The outer sheath 711 is made of flame retardant polyvinyl chloride (PVC) or specially flame retardant low-smoke halogen-free material (LSZH). The flame retardant layer 712 is made of a special flame retardant material.

The first set of twisted pairs 72, the second set of twisted pairs 73, the third set of twisted pairs 4, and the fourth set of twisted pairs 75 each include: a first insulator 721 having a color, located in the first insulator 721 a first copper conductor 722, a second insulator 731 having a color and being twisted with the first insulator 721, and a second copper conductor 732 located in the second insulator 731, and the first insulator 721 and the second insulator 731 The outer second shield layer 741.

The cable 70 satisfies the data transmission performance of 1200 MHz or less.

12 is a schematic structural view of a twelfth embodiment of the present invention. The cable 80 shown in FIG. 12 is different from the cable shown in FIG. 9 in that the cable 80 includes a sheath 81 and is located inside the sheath 81. The plurality of twisted pairs 82 and the filling cord 83 located at the center of the sheath 81. In the present embodiment, the twisted pair 82 is provided with two rows, the first row of twisted pairs 82 is next to the inner wall of the sheath 81, and the second The pair of twisted pairs 82 are next to the first row of twisted pairs 82, and the fill cords 83 are located at the center of the second row of twisted pairs 82.

The sheath 81 includes an outer sheath 811 located outside, a flame-retardant layer 812 disposed adjacent to the outer sheath 811, and a first cladding layer 813 disposed adjacent to the flame-retardant layer 812 and located inside the sheath 81.

The first set of twisted pairs 82, the second set of twisted pairs 83, the third set of twisted pairs 84, and the fourth set of twisted pairs 85 each include: a first insulator 821 having a color, located within the first insulator 821 The first copper conductor 822, the second insulator 831 having a color and being twisted with the first insulator 821, and the second copper conductor 832 located in the second insulator 831.

The first insulator 821 is provided with a color strip or a color ring of the same color as the second insulator 831.

In this embodiment, there are 16 first-pair twisted pairs, and the second row has 9 pairs of glue lines, that is, 25 pairs of large logarithmic cables. The polyester tape 813 is wrapped around the cladding as a total cladding layer after 25 pairs of cables.

Table 1 line pairs are preferred to use color color order

Among them, the brackets in Table 1 indicate the color of the color strip or color circle of the strip.

Wherein, the outer sheath 811 is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH); the flame-retardant layer 812 is made of a special flame-retardant material; Layer 813 is made of a polyester tape. Each of the twisted wires 82 includes: a first insulator 821 having a color, a first copper conductor 822 located in the first insulator 821, a second insulator 823 having a color and being twisted with the first insulator 821, and located therein A second copper conductor 824 within the second insulator 823.

This cable 80 satisfies 100 MHz data transmission performance.

13 is a schematic structural view of a thirteenth embodiment of the present invention. The cable 80 shown in FIG. 13 is different from the cable shown in FIG. 12 in that the sheath 81 further includes a flame-retardant layer 812 and a first cladding. A second shield layer 814 between the layers 813 and a ground line 815 between the first cladding layer 813 and the second shield layer 814. The sheath 81 includes an outer outer sheath 811, a flame-retardant layer 812 disposed adjacent to the outer sheath 811, and a second shield layer 814 disposed adjacent to the flame-retardant layer 812, and the second shield layer 814 a first cladding layer 813 that is disposed adjacent to the interior of the sheath 81.

Wherein, the outer sheath 811 is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH); the flame-retardant layer 812 is made of a special flame-retardant material; Layer 813 is made of a polyester tape; second shield layer 814 is made of an aluminum-plastic composite tape.

This cable 80 satisfies 100 MHz data transmission performance.

14 is a schematic structural view of a fourteenth embodiment of the present invention. The difference between the cable 80 shown in FIG. 14 and the cable shown in FIG. 12 is that the cable 80 shown in FIG. 14 is not provided with a filling cord 83, and a stranded wire. There is no shield set outside.

The cable 80 includes a sheath 81 and at least 10 twisted pairs 84 located inside the sheath 81. In the present embodiment, the twisted pair 84 is provided with 25, and each twisted pair 84 includes: having a color a first insulator 841, a first copper conductor 842 located in the first insulator 841, a second insulator 843 having a different color or the same color and being twisted with the first insulator 841, and a second portion located in the second insulator 843 Two copper conductors 844.

In other embodiments, the cable includes: a sheath, and 25 pairs of strands inside the sheath, the sheath comprising: an outer sheath located externally, a flame retardant layer disposed adjacent to the outer sheath, and The flame-retardant layer is adjacent to the first cladding layer disposed inside the jacket.

Wherein, the outer sheath is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH); the flame-retardant layer is made of a special flame-retardant material; Made of polyester tape.

In other embodiments, the cable includes: a sheath, and 25 pairs of strands inside the sheath, the sheath comprising: an outer sheath located externally, a flame retardant layer disposed adjacent to the outer sheath, and The flame-retardant layer is adjacent to the second shielding layer, the first cladding layer disposed adjacent to the second shielding layer and located inside the sheath, and the ground line between the first cladding layer and the second shielding layer.

Wherein, the outer sheath is made of flame retardant polyvinyl chloride (PVC) or a special flame retardant low-smoke halogen-free material (LSZH); the flame-retardant layer is made of a special flame-retardant material; Made of a polyester tape; the second shielding layer is made of an aluminum-plastic composite tape.

This cable 80 satisfies the 16 MHz data transmission performance.

15 is a schematic structural view of a fifteenth embodiment of the present invention. The cable 90 shown in FIG. 15 is different from the cable shown in FIG. 14 in that the cable 90 includes a sheath 91 and is located inside the sheath 91. The four sub-units 92, 93, 94, 95, each of the sub-units are externally twisted by the identification strip 921, and each sub-unit is internally provided with a plurality of twisted pairs 96, each of which comprises: a color first The insulator 961, the first copper conductor 962 located in the first insulator 961, the second insulator 963 having a color and being twisted with the first insulator 961, and the second copper conductor 964 located in the second insulator 963.

The first insulator 961 is provided with a color strip or a color ring of the same color as the second insulator 962.

The label strip 921 in each sub-unit 92 is used to indicate the difference of the four sub-units 92.

In this embodiment, there are 25 twisted pairs in each subunit.

The color of 25 twisted pairs in each sub-unit is shown in Table 2 below.

Table 2 line pairs are preferred to use color color order

[Correct according to Rule 26 15.12.2017]

Among them, the brackets in Table 2 indicate the color of the color strip or color circle of the strip. The cable 90 satisfies the 16 MHz data transmission performance.

In other embodiments, the cable includes: a sheath, and four sub-units located inside the sheath, each of the sub-units is externally twisted by the identification tape, and each sub-unit is internally provided with 25 twisted pairs, each of which is twisted The wire includes a first insulator having a color, a first copper conductor located within the first insulator, a second insulator having a color and being twisted with the first insulator, and a second copper conductor positioned within the second insulator.

The sheath includes an outer sheath on the outer side, a flame-retardant layer disposed adjacent to the outer sheath, and a first cladding layer disposed adjacent to the flame-retardant layer and located inside the sheath.

The first cladding layer is made of a polyester tape.

The sheath includes an outer sheath located outside, a flame-retardant layer disposed adjacent to the outer sheath, a first shielding layer disposed adjacent to the flame-retardant layer, and a first portion disposed adjacent to the first shielding layer and located inside the sheath a second cladding layer and a ground line between the first shielding layer and the second cladding layer.

The first shielding layer is made of an aluminum-plastic composite tape, and the second coating layer is made of a polyester tape. The cable core of the cable of the invention is coated with a special flame-retardant material, which exhibits superior flame retardant performance in large-scale combustion test, can pass large-scale beam burning test, and electrical performance satisfies YD/T 1019 digital communication Polyolefin insulated horizontal twisted pair cable, IEC 61156-5 digital communication multi-core symmetrical paired/four-core cable, IEC 61156-4 digital communication twisted or star-stranded multi-core symmetrical cable, ANSI/TIA-568-C.

2 Standard for balanced twisted pair communication cables and their components, a special flame retardant layer is added to the core of the cable, and then sheathed to form the flame retardant cable of the present invention.

The cable of the invention is coated or woven with a special flame retardant material, and the sheath is made of special flame retardant PVC or special flame retardant property LSOH, so that the data The cable has high fireproof performance in flame retardant; the cable of the present invention serves as a data center, integrated wiring, server, machine room cabinet, Internet cafe equipment and equipment, distribution frame and equipment, and panel interface to equipment connection line.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details in the above embodiments, and various equivalent transformations may be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. It belongs to the protection model of the present invention.

Claims

A flame-retardant cable, comprising: an outer sheath, and four sets of twisted pairs located in the sheath and twisted by different colors; wherein the sheath comprises a polyvinyl chloride An outer sheath made of a low-smoke, halogen-free material, and a flame-retardant layer disposed adjacent to the outer sheath; each of the twisted wires includes: a first insulator, a first copper conductor located in the first insulator a second insulator that is twisted with the first insulator, and a second copper conductor that is located within the second insulator.
The flame-retardant cable according to claim 1, wherein said first insulator and said second insulator are each made of high-density polyethylene.
The flame-retardant cable according to claim 1, wherein the first insulator and the second insulator are different in color.
The flame-retardant cable according to claim 3, wherein the first insulator is provided with a color strip or a color ring of the same color of the second insulator.
The flame-retardant cable according to claim 1, wherein the four sets of twisted pairs are respectively: a first set of strands and a second color of the same color or the same color as the first color a second set of strands twisted with the same or different colors of the second color, a third set of strands of the third color that are identical or different in color to the third color, and the fourth color being the same as the fourth color or A fourth set of twisted pairs of different colors, wherein the first color, the second color, the third color, and the fourth color are all different.
A flame-retardant cable according to claim 1, wherein said flame-retardant layer is located on an inner wall of said sheath.
The flame-retardant cable according to any one of claims 1 to 6, wherein the cable further comprises: an insulating strip in a cross structure in the sheath, the insulating strip twisting the four groups The lines are isolated from each other.
A flame-retardant cable according to claim 7, wherein said insulating strip is made of polyethylene.
A flame-retardant cable, comprising: a first cable and a second cable connected together, wherein the first cable and the second cable are both according to any one of claims 1-6 cable.
A flame-retardant cable, characterized in that it comprises a first cable and a second cable connected together, the first cable and the second cable being the cable according to claim 7 or 8.