CN1216384C - High performance data cable and high performance data cable with gas filled non-fluorinated sheath - Google Patents

Abstract

This invention deals with high preformance bound lateral shielded twisted pair cables (20, 25, 30) having a high performance data cable (10A & B) containing at least four of the bound lateral shielded twisted pair cables (20, 25, 30), and a method for preparing the same. The bound lateral shielded twisted pair cables (20, 25, 30) preferably have a 20 DEG C. adjusted standard impedance deviation of 4.5 or less and contains at least four of the bound lateral shielded twisted pair cables (10). The twisted pair is laterally wrapped with a metal shield tape (16) and one of a fabric, metal braid, or thread (18) at a tension that provides the above. The tension is such that it provides a cross-sectional void area of less that 25% and preferably less than 18% of the lateral shielded twisted pair cable cross-sectional area. The tape (16) is laterally wrapped with an overlap of at least 10%. Preferably, the cable (20, 25, 30) has a rating out to 600MHz and 1000MHz. We provide a UL 910 plenum at least category 5-high performance data cable (20, 25, 30) that has a non-fluorinated jacket (19) and between the jacket (19) and a cable core, a temperature-resistant flame-retardant separator tape (27).

Description

High performance data cable and high performance data cable with gas filled non-fluorinated sheath

technical field

The present invention relates to a high performance data cable which can successfully transmit in the frequency range of 0.3 MHz to 1200 MHz, especially in the range of 1.0 to 600 MHz and/or 1.0 to 1000 MHz. The invention also relates to a UL910 high performance plenum cable with a non-fluorinated sheath. In particular, the present invention relates to a high performance data cable having longitudinally wrapped shielded twisted pair cores. Also, the invention specifically relates to at least a class 5 UL910 cable having a non-fluorinated sheath and a heat resistant flame retardant tape around the inside of the sheath.

Background technique

Existing high performance data cables typically use a heavy and rigid 0.051 mm (2 mil) thick aluminum tape with a 0.025 mm (1 mil) thick polyester (Mylar) backing as a shield. The shield is wrapped around each unshielded twisted pair subgroup with a lay length equal to the length of the entire cable lay of the cable cores, typically 101.6 to 152.4 mm (4.0 to 6.0 inches). The strip is approximately 12.7 millimeters (0.5 inches) wide. The application angle of the wrap is shallow based on the overall long cable lay length (eg 127mm, ie 5 inches) and the tape is nearly parallel to the longitudinal axis of the twisted pair. A typical cable has a 4 twisted pair core to which a 40 to 65% tinned copper braid is applied and a final thermoplastic sheath is extruded over the braided pairs to complete the cable. The shallow application angle of the metal shielding tape often presents problems with loosening the tape during the cabling operation prior to binding or helical application of the drain wires.

Also, the ribbon typically does not conform to the shape of the twisted pairs under the ribbon. As wrapping operates on unshielded twisted pair cores, a band gap is created which does not provide a sufficiently stable ground plane to meet the electrical requirements of industry standards such as CENELEC pr EN 50288-4-1.

Said known cable constructions are mechanically unstable under static conditions and electrically unstable under installed conditions since the overall braid does not adequately ensure that the strap laps do not "bloom" open when the cable is bent . This "blooming" then increases and further impacts the impedance/RL performance as the ground plane is destroyed. This increases the non-uniformity of attenuation. This impedance value is also degraded by bending due to conductor-to-core and ground plane variations. The higher the bandwidth requirements, the greater these problems.

To our knowledge, no cable construction for high performance UL910 inflatable data cables has a non-fluorinated jacket. Pneumatic cables employing fluorinated sheaths and temperature and flame retardant barrier tapes such as Nomex ^(R) (a temperature and flame retardant nylon manufactured by DuPont) had been used and sold by Belden Wire and Cable Company in the year prior to the present invention. The ^Nomex® tape in its cable prevents the fluorinated (FEP) sheath from dripping and producing high peak smoke values in the UL910 burn test.

Contents of the invention

In order to solve the problems of the above-mentioned prior art, the technical solution of the present invention is achieved in this way:

An individually bundled longitudinally wrapped shielded twisted-pair data cable comprising: an insulated twisted-pair core, a shielding tape selected from a metal tape, a second layer having a non-metallic base layer and a layer of metal on one side of said base layer. In the group consisting of a composite tape, and a second composite tape having a non-metallic base layer with a layer of metal on both sides of said base layer; Lap longitudinal wrapping; fabric or metal binding wire is wrapped around said shielding tape to provide a bundled longitudinal wrapping shielded twisted-pair cable core; said shielding tape has a metal thickness of 0.008 to 0.051 mm; said shielding tape and The binding wire is wrapped around the twisted pair with a certain tension to eliminate a large amount of air, and to reserve a cross-sectional void space less than 25% of the cross-sectional area of the shielded twisted pair cable core to provide the bundled longitudinal wrap Shielded twisted-pair data cable; and when calculating a standard impedance deviation at a mean or average impedance of 50 to 200 ohms, providing said bundled longitudinally wrapped shielded twisted-pair data cable is 4.5 or less of said standard when conditioned at 20°C Impedance deviation.

An inflatable high-performance data cable, comprising: the cable core includes at least four twisted-pair cable cores, each of the twisted-pair cable cores is longitudinally shielded and bundled to provide at least four bundled longitudinally shielded twisted Twisted pair cable cores, each of the shielding tapes binding the at least four twisted pair cable cores is longitudinally wrapped around the respective twisted pair with an overlap of at least 10%; each of the shielding tapes is wrapped with a certain tension on the respective twisted pair, to eliminate a substantial amount of air, and to retain a cross-sectional void space of less than 25% of the cross-sectional area of the shielded twisted-pair core to provide a bundled longitudinally wrapped shielded twisted-pair data cable; and when When calculating the standard impedance deviation in the middle or average impedance of 50 to 200 ohms, provide the standard impedance deviation of 4.5 or less when the bundled longitudinally wrapped shielded twisted pair data cable is adjusted to 20°C; heat-resistant and flame-retardant isolation tape Wrapped on the at least four bundled longitudinally wrapped shielded twisted-pair cable cores, the isolation zone is located between the sheath and the cable core, and the sheath is non-fluorinated polyolefin.

A method of preparing individually bundled longitudinally wrapped twisted-pair data cables, comprising: providing a twisted-pair cable core with insulation selected from the group consisting of foamed, non-foamed fluorocopolymers and polyolefins; The shielding tape overlaps the twisted pair longitudinally with at least 10% of the shielding tape to provide a longitudinally wrapped shielded twisted pair cable core, the shielding tape has a metal thickness of 0.008 to 0.051 mm, and the shielding tape is selected from Composition of a free metallic tape, a first composite tape having a non-metallic base layer with a layer of metal on one side of said base layer, and a second composite tape having a non-metallic base layer and a layer of metal on both sides of said base layer In the group; using fabric or metal binding wire to wrap the longitudinally wrapped shield twisted pair cable core to provide a bundled longitudinally wrapped shielded twisted pair cable core; and wrap the longitudinally wrapped metal shield and tie wire with a certain tension, To make the bundled longitudinal shielded twisted-pair cable cores have a standard impedance deviation of 4.5 or less when the standard impedance deviation is detected for a cable of 99.97 meters or longer when adjusted to 20°C, wherein at least 350 times are performed Measure and perform standard impedance calculations at a median or average impedance of 50 to 200 ohms.

The present invention uses longitudinally wrapped shielding tape on each twisted pair cable core, which is bound with fiber or metal binding wires to meet the required impedance/RL, attenuation uniformity and capacitance imbalance.

The present invention eliminates the substantial amount of trapped gas typically found in shielded twisted pair cable cores. This can be accomplished by using longitudinal cladding shields preferably with a minimum of 10% overlap and having metal layers 0.008 to 0.051 mm (0.33 to 2.0 mils) preferably 0.025 mm (1 mil) thick. The longitudinal wrap shields may be held together by suitable ties and preferably by fabric or metal braids or helical ties to provide superior shielding with improved impedance control. When required, short folds can be applied along the longitudinal slots of the shield for improved EMI/Rfi isolation. The resulting consistent ground plane along the length of the cable results in better capacitive imbalance and improved attenuation uniformity by reducing RL reflections and capacitive imbalance.

The present invention also provides for substantial stability of the geometry under bending conditions. The use of dense longitudinal shielding with at least 10% overlap and fabric or metal ties eliminates tape gaps and flowering in case of bending. This creates very stable physical and electrical properties under adverse conditions of use. The core-to-core distance of the twisted pair cable of the present invention is shown in Fig. 3, and the conductor-to-ground distance remains more stable than that of existing cables.

The cables of the present invention are particularly suitable for class 7 and higher performance cables. In particular, the cable of the present invention employs longitudinal shielding and binding, and can be used at 600 MHz or 1000 MHz. A typical high performance data cable when made in accordance with the present invention has four (4) twisted pair wires, each of which is insulated by two foam or non-foam insulated (fluorocopolymer or polyolefin ) made of a single line. Each twisted pair cable has a single longitudinal metal shielding tape that is wrapped around the cable and that forms short folded longitudinal seams in place of binding wires, such as fabric or metal braid or spiral wrap. When braid is used as tie wire, it is 40 to 95% braid. When wire winding is used, it is preferably helically wound. Longitudinal shielded pairs are bundled or bundled in S-Z or planetary form. Stranded pairs can be bundled with an overall 40-95% braid or wrap. Finally a thermoplastic jacket (fluorocopolymer or polyolefin or polyvinyl chloride) is extruded over the bundled twisted pair cables.

Typically, the metal shield is aluminum tape or a composite tape such as short folded BELDFOIL tape (which is a shield in which a metal foil or cladding is applied on one side of a supporting plastic film), or DUOFOIL tape (which is a shield in which Metal foil or cladding applied on both sides of the supporting plastic film), or free edge BELDFOIL tape. The overall metal thickness is 0.008 to 0.051 mm (0.33 to 2.0 mils) aluminum layer thickness, and preferably about 0.025 mm (1.0 mils). While aluminum can be used, any metal suitable for this metal or composite metal strip can be used, such as copper, copper alloys, silver, nickel, and the like. Each twisted pair can be wrapped with the metal side out, and while the best wrapping forms have about a 25% overlap, the overlap can be from 10 to 50% depending on the situation. The shield that provides the best attenuation and impedance performance is best bonded to provide the breaking action. With proper lap joints, short folds can be eliminated.

The number of shielded twisted wire pairs in high-performance data cables is usually 4-8 pairs, and then it can be more as required. The longitudinal shield and tie are tensioned so that more air is eliminated by wrapping the shield and tie to provide standard impedance deviations for the longitudinal shielded twisted pair core and for high Performance data cables provide an average standard impedance deviation. The tension on the tape and tie is such that the overall cross-sectional area of the longitudinally wrapped shielded twisted pair taken at any point along the length of the cable has only 25% or less and preferably 18% or less void space.

The present invention provides a high performance twisted pair data cable having a shield longitudinally wrapped around an unshielded twisted pair core and a fabric or metal braid or yarn wrapped longitudinally around the shield to bind the shield Wire. Shielding and binding (braiding or bundling) are wrapped with a tension such that each twisted pair has an unsuitable impedance for each twisted pair available on itself, which is not the case for longitudinally wrapped shielded twisted pair cables The core has a nominal or standard impedance deviation. For the cable core above 600MHz, the standard impedance deviation is 3.5 or less in the range of 1.0 to 600MHz, and does not have a single impedance deviation greater than 6.0. For the cable above 1000MHz For cores, the standard impedance deviation is 4.5 or less in the range of 1.0 to 1000 MHz, and does not have a single impedance deviation greater than 6.0. High performance data cables having a plurality of longitudinally shielded twisted-pair cores having an average standard impedance deviation of 3.5 or more for all longitudinally shielded twisted pairs in the range 1.0 to 600 MHz for cores above 600 MHz below, and there is no single standard deviation greater than 6.0 for any core. High performance data cables having a plurality of longitudinally shielded twisted-pair cores having an average standard impedance deviation of 4.5 or more for all longitudinally shielded twisted pairs in the range 1.0 to 1000 MHz for cores above 1000 MHz below, and there is no single standard deviation greater than 6.0 for any core. Standard impedance deviations may be calculated around a median or average impedance of 50 to 200 ohms and at least 350 tests for a cut of 99.97 meters (328 feet) or longer of cable.

Also, the present invention provides a high performance data cable that is capable of being labeled as a UL910 High Performance Data Inflatable Cable. The cable preferably has a non-fluorinated sheath and a temperature-resistant and flame-retardant insulating tape connected to the sheath under the sheath. Other advantages of the present invention will be more clearly understood through the detailed description in conjunction with the accompanying drawings.

Description of drawings

Figure 1 is a perspective view of a twisted pair cable used in the present invention;

Figure 2 is a perspective view of a longitudinally wrapped twisted pair cable according to the present invention;

Figure 3 is an enlarged cross-sectional view taken along line 3-3 of Figure 2;

Fig. 4 A is the enlarged cross-sectional view of braided vertical sheathing twisted pair cable according to the present invention;

Fig. 4 B is according to the enlarged sectional view of cable binding longitudinally wrapped shielding twisted pair cable of the present invention;

Figure 5 is a cross-sectional view of a cable comprising four cores of Figure 4A;

Figure 6 is a perspective view of the cable of Figure 5;

Figure 7 is a cross-sectional view of a cable comprising the four cores of Figure 4B; and

Figure 8 is a perspective view of one of the pneumatic UL910 high performance data cables of the present invention.

Detailed ways

Figure 1 shows a twisted pair cable core 10 having conductor pairs 12 and 13, which are preferably solid copper conductors and can be any conductors suitable for high performance data cables. Each conductor 12 and 13 has extruded suitable insulation 14 and 15 which may be foamed or non-foamed fluorocopolymer or suitable polyolefin.

FIG. 2 shows the twisted pair of FIG. 1 with the metal shield 16 tightly wrapped around it. The metal shield can be any suitable shield such as metal tape or a composite tape with a non-metallic base layer such as polyester (MYLAR Mylar) with metal normally used for cable shielding on one or both sides of the non-metallic base layer. Metals used for the strip or composite strip are aluminum, copper, copper alloys, nickel, silver, and the like. The overall metal thickness is 0.008 to 0.051 millimeters (0.33 to 2.0 mils), and preferably 0.025 millimeters (1.0 mils). The shield is a metal shield, eg a short folded BELDFOIL type strip, or a DOUFOIL type strip which is a strip with metal on both sides of the strip.

Tape 16 is longitudinally wrapped with sufficient pressure, as shown in FIG. 3, so as not to crush insulation 14 and 15, and to provide a small void space 17, which is less than 25% of the cross-sectional area shown in FIG. Preferably the void space is less than 18% of the cross-sectional area shown in FIG. 3 . The tightly wrapped tape 16 conforms to the outer shape of the twisted pair 10 to provide longitudinally wrapped shielded twisted pair cable core 10A. The strap 16 is wrapped with a slight overlap and preferably with short folds. As noted above, the preferred thickness for aluminum or metal is 0.025 mm (1 mil). The width of the tape is then sufficient to provide a minimum overlap of 10%.

As shown in Figures 4A and 4B, the shielded twisted pair cores 10A (Figure 3) are held tightly together by a wrap 18 or 18' to provide wrapped shielded cores 10B and 10C. The tension on the tape and wrapping is tight enough to conform to the contour of the unshielded twisted pair 10 to provide a substantially overall cross-sectional shape, and with a tightness that does not deform the insulation 14 and 15 . The longitudinal wrapping and bundling is done under tension such that it eliminates a large amount of air within the wrapped shielded twisted pair cores 10B and 10C. This provides a dense overall cross-section with void space 17 at any point along the length of the cable. This dense cladding provides standard impedance deviations and average standard impedance deviations as described above.

The insulation is preferably foamed fluorocopolymer having a thickness of 0.010-0.060 inches, preferably 0.015 to 0.020 inches. Each wire 12 and 13 is typically 0.518 to 0.0509 square millimeters (20 to 30 AWG), and preferably 0.326 to 0.205 square millimeters (22 to 24 AWG).

The wires can be solid or stranded, and are preferably solid. The lay torques can be the same or different for all four twisted pair cores 10 and can be right and/or left twisted. The twist torque is preferably 0.3-2.0 inches. The twist moment of the entire cable is usually 10 to 20 times the average core diameter of the cable.

Wrap 18 may be a fabric (such as Aramid) or a metal braid, preferably a 40-95% braid. The metal is preferably a 45-65% tinned copper braid, but it can also be any type of metal braid suitable for high performance cables such as Type 7 data cables, such as copper, copper alloys, bronze (a copper alloy, Among them, alloying elements except nickel or zinc), silver, etc.

The wrap 18' is a fiber thread (Aramide) that is helically wound to provide 40-95% coverage. The present invention preferably uses Aramid 760 fibers having a 1/4 inch pitch.

Referring to Figure 5, wrapped shielded cores 10B and 10C have an extruded jacket 19 to make a high performance data cable 20 of the present invention. The jacket can be any suitable cable jacket material, which can be a thermoplastic material suitable for class 7 cables, such as flame retardant polyethylene, polyvinyl chloride, fluorocopolymers, etc.

Figure 6 shows a cable 20 having four braided shielded twisted pair cores 10B. An optional ground wire 21 is located between the cores 10B. The ground wires are laid at any suitable location, such as just under the jacket and/or for bundling the four braided shielded cores 10B.

Figure 7 shows a cable 25 having four sheathed shielded twisted pair cores 10C. The four wrapped shielded twisted-pair cable cores 10C can be further wrapped or bundled with metal or braid 22 . Braid 22 is generally of the same type as braid 18 described above. An optional ground wire 21 is located between the cores 10C. As mentioned above, the ground wire lay can be located at any suitable location, such as just under the jacket and/or for bundling the four shielded cores 1OC.

Figure 8 shows a cable 30 with a sheath 26 and a separator strip 27 wrapped helically or longitudinally under the sheath. The separator tape 27 is wound around the four twisted-pair covered shielded cores 10C and their wrapping braid 22 . Sheath 26 is a non-fluorinated sheath, such as polyvinyl chloride. The separation belt 27 is a temperature-resistant and flame-retardant separation belt, such as ^Nomex® . The construction of this cable is similar to that of Figure 7 except that the cable has a separator strip 27 and does not have a fluorinated sheath. Many of these non-metallic braided or shielded twisted pair cores can be bundled or wrapped with ground wire 21 when desired. The bundled twisted-pair cores are then wrapped around the divider and extruded out of the sheath 26 .

As shown in Examples 1-7 of the present invention, the high performance braided longitudinally shielded twisted pair cable core has an unfavorable impedance with a standard impedance deviation of at least 350 measurements from 1.0 to 600 MHz for cables above 600 MHz 3.5 or less, and for cables above 1000 MHz, have a standard impedance of 4.5 or less for at least 350 measurements from 1.0 to 1000 MHz. A high performance data cable with many braided shielded twisted pair cores has an average impedance deviation of 3.5 or less in the range of 1.0 to 600 MHz and 4.5 or less in the range of 1.0 to 1000 MHz for all braided shielded twisted pairs , and the single standard impedance deviation is not greater than 6.0. The tests performed for all examples were impedance tests in accordance with CENELEC requirements and were performed on a 99.97 m (328 ft) length of bundled shielded twisted-pair core where the shielding is longitudinally wrapped to provide twisted Twisted pair cable core 10A. The longitudinal wrap shield was BELDFOIL tape with an aluminum thickness of 0.025 mm (1 mil). The strap wraps longitudinally with a slight lap. Longitudinal straps can be bound with metal braids. Detection was initiated at 0.3 MHz and at least three hundred and fifty (350) detections were performed in the range of about 1 to 600 MHz for Examples 1 and 8 and in the range of about 1.0 to 1000 MHz for Examples 2-7. The cable conductors 12 and 13 were 0.326 mm2 (22 AWG) solid copper and the insulation 14 and 15 were FEP. Measurements were carried out at various temperatures and adjusted to 20°C. All cables had less than 18% void space and were tested near an average impedance of 100 ohms.

example 1

A 99.97 meter (328 ft) length of the above braided shielded twisted pair core 10B was tested at 23.3°C. The cable impedance test is performed in the range of 0.3 to 600MHz, and at least 350 tests are performed in the range of 1.0 to 600MHz. The braided shielded twisted pair core was tested with a standard impedance deviation of 1.7714 around the average impedance of 95.2619.

Example 2

A 99.97 meter (328 ft) length of the above braided shielded twisted pair core 10B was tested at 23.3°C. The cable impedance test is performed in the range of 0.3 to 1000MHz, and at least 350 tests are performed in the range of 1.0 to 1000MHz. The braided shielded twisted pair core was tested with a standard impedance deviation of 2.8565 around the average impedance of 94.3178.

Example 3

A 99.97 meter (328 ft) length of the above-described high performance data cable 20 having four braided shielded twisted pair cores 10B was tested at 23.9°C. The impedance of each braided twisted pair cable core is tested in the range of 0.3 to 1000MHz. At least 350 detections are performed in the range of 1.0 to 1000 MHz. The following data can be adjusted to 20 ℃.

The first braided shielded twisted pair core has a standard impedance deviation of 4.2744 around the average impedance of 100.5321.

The second braided shielded twisted pair core has a standard impedance deviation of 5.1630 around the average impedance of 100.5321.

The third braided shielded twisted pair core has a standard impedance deviation of 4.0469 around the average impedance of 101.4583.

The fourth braided shielded twisted pair core has a standard impedance deviation of 4.3360 around an average impedance of 100.7506.

The high performance data cable 20 of this example has an average impedance deviation of 4.4551 ((4.2744+5.1630+4.0469+4.3360)/4).

Example 4

A 99.97 meter (328 ft) length of the above-described high performance data cable 20 having four braided shielded twisted pair cores 10B was tested at 23.9°C. The impedance of each braided twisted pair cable core is tested in the range of 0.3 to 1000MHz. At least 350 detections are performed in the range of 1.0 to 1000 MHz. The following data can be adjusted to 20 ℃.

The first braided shielded twisted pair core has a standard impedance deviation of 4.0430 around an average impedance of 101.1783.

The second braided shielded twisted pair core has a standard impedance deviation of 4.0027 around the average impedance of 101.3086.

The third braided shielded twisted pair core has a standard impedance deviation of 3.6038 around the average impedance of 101.7716.

The fourth braided shielded twisted pair core has a standard impedance deviation of 4.0092 around an average impedance of 101.3598.

The high performance data cable 20 of this example has an average impedance deviation of 3.9147 ((4.0430+4.0027+3.6038+4.0092)/4).

Example 5

A 99.97 meter (328 ft) length of the above-described high performance data cable 20 having four braided shielded twisted pair cores 10B was tested at 23.9°C. The impedance of each braided twisted pair cable core is tested in the range of 0.3 to 1000MHz. At least 350 detections are performed in the range of 1.0 to 1000 MHz. The following data can be adjusted to 20 ℃.

The first braided shielded twisted pair core has a standard impedance deviation of 3.2469 around the average impedance of 199.2035.

The second braided shielded twisted pair core has a standard impedance deviation of 4.2070 around an average impedance of 100.9596.

The third braided shielded twisted pair core has a standard impedance deviation of 3.4690 around an average impedance of 102.8214.

The fourth braided shielded twisted pair core has a standard impedance deviation of 3.8990 around the average impedance of 101.2338.

The high performance data cable 20 of this example has an average impedance deviation of 3.7055 ((3.2469+4.2070+3.4690+3.8990)/4).

Example 6

A 99.97 meter (328 ft) length of the above-described high performance data cable 20 having four braided shielded twisted pair cores 10B was tested at 24.2°C. The impedance of each braided twisted pair cable core is tested in the range of 0.3 to 1000MHz. At least 350 detections are performed in the range of 1.0 to 1000 MHz. The following data can be adjusted to 20 ℃.

The first braided shielded twisted pair core has a standard impedance deviation of 4.0488 around an average impedance of 101.4423.

The second braided shielded twisted pair core has a standard impedance deviation of 4.2081 around an average impedance of 100.9498.

The third braided shielded twisted pair core has a standard impedance deviation of 4.5567 around the average impedance of 102.0121.

The fourth braided shielded twisted pair core has a standard impedance deviation of 3.6408 around the average impedance of 102.9531.

The high performance data cable 20 of this example has an average impedance deviation of 4.1136 ((4.0488+4.2081+4.5567+3.6408)/4).

Example 7

A 99.97 meter (328 ft) length of the above-described high performance data cable 20 having four braided shielded twisted pair cores 10B was tested at 24.2°C. The impedance of each braided twisted pair cable core is tested in the range of 0.3 to 1000MHz. At least 350 detections are performed in the range of 1.0 to 1000 MHz. The following data can be adjusted to 20 ℃.

The first braided shielded twisted pair core has a standard impedance deviation of 3.6939 around an average impedance of 102.0776.

The second braided shielded twisted pair core has a standard impedance deviation of 3.8658 around an average impedance of 100.4614.

The third braided shielded twisted pair core has a standard impedance deviation of 3.5208 around the average impedance of 99.7808.

The fourth braided shielded twisted pair core has a standard impedance deviation of 3.9835 around an average impedance of 100.0594.

The high performance data cable 20 of this example has an average impedance deviation of 3.7660 ((3.6939+3.8658+3.5208+3.9835)/4).

Example 8

A 99.97 meter (328 ft) length of the above-described high performance data cable 20 having four braided shielded twisted pair cores 10B was tested at 24.4°C. The impedance of each braided twisted pair cable core is tested in the range of 0.3 to 600MHz. At least 350 detections were performed in the range between 1.0 and 600 MHz. The following data can be adjusted to 20 ℃.

The first braided shielded twisted pair core has a standard impedance deviation of 3.5621 around an average impedance of 102.2971.

The second braided shielded twisted pair core has a standard impedance deviation of 3.9185 around the average impedance of 103.9484.

The third braided shielded twisted pair core has a standard impedance deviation of 2.6943 around the average impedance of 103.2519.

The fourth braided shielded twisted pair core has a standard impedance deviation of 2.5206 around an average impedance of 102.9625.

The high performance data cable 20 of this example has an average impedance deviation of 3.1739 ((3.5621+3.9185+2.6943+2.5206)/4).

Example 9

Carry out the UL910 test on the two cables shown in Figure 8. Each cable has four twisted pair bundled shielded cores 10C. The shield 16 of each core is a 0.051 mm (2 mil) aluminum/0.0125 mm (0.5 mil) polyester tape having a width of 15.875 mm (0.625 inches). Each shield 16 is wrapped with an Aramid 760 wrap. Four bundled shielded cores are sheathed with a 40% tinned copper braid. The four braided bundle cores are wrapped with 0.051 mm (2 mil) Nomex barrier tape, which is 1.250 inches wide. Over the isolation strip is an extruded PVC sheath. Both cables have passed the UL910 inflatable test. In the UL910 inflation test, the first cable showed a flame of 38.1mm (1.5 inches), a peak of 0.32 and an average P/F of 0.09. The second cable showed a flame of 38.1 mm (1.5 inches), a peak of 0.29 and an average P/F of 0.09. Two cables will be classified as Class 7 cables, which have speeds above 1000MHz.

While the present invention has been tested to UL910 for at least a Class 5 inflatable high performance data cable to UL910 for the cable shown in Figure 8 for a Class 7 cable, it will be appreciated that the present invention is not limited to the particular construction of this cable, but rather may relate to Any class 5 or higher cable that uses a non-fluorinated sheath, such as PVC, and also has a temperature-resistant, flame-retardant barrier between the sheath and the cable. For example, the present invention provides a UL910 inflatable high-performance data cable with a rated frequency above 600 MHz, which has the structure disclosed in the common application of the present invention, wherein a helical shielded twisted-pair cable core is densely wound, and in Non-fluorinated sheath such as PVC sheath is used in the cable, and there is a temperature-resistant and flame-retardant separation belt between the sheath and the cable core. The UL910 gas-filled high-performance data cable of at least grade 5 of the present invention is not limited to the above-mentioned cable core, but for the UL910 gas-filled high-performance data cable of at least grade 5, it can have a non-fluorinated sheath, and the cable between the sheath and the cable core There may be a temperature-resistant and flame-retardant separation belt between them.

Of course, it can be understood that the embodiments have been described with reference to the accompanying drawings, but the present invention is not limited to the above specific embodiments. Those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention defined in the claims.

Claims (21)

1. A separately bundled longitudinally wrapped shielded twisted pair data cable, comprising: Insulated twisted pair cable core, Shielding tape selected from the group consisting of a metallic tape, a first composite tape having a non-metallic base layer with a layer of metal on one side of said base layer, and a non-metallic base layer with a layer of metal on both sides of said base layer In the group consisting of the second composite belt; said shielding tape is longitudinally wrapped around said individual twisted pair cores with an overlap of at least 10%; Fabric or metal binding wires are wrapped around the shielding tape to provide bundled longitudinal shielded twisted-pair cable cores; The shielding strip has a metal thickness of 0.008 to 0.051 mm; The shielding tape and binding wire are wrapped around the twisted pair with a certain tension to eliminate a large amount of air, and to reserve a cross-sectional void space less than 25% of the cross-sectional area of the shielded twisted pair cable core to provide said bundled longitudinally wrapped shielded twisted pair data cable; and When the standard impedance deviation is calculated at a mean or average impedance of 50 to 200 ohms, it provides said standard impedance deviation of 4.5 or less when said bundled longitudinally wrapped shielded twisted pair data cable is conditioned at 20°C. 2. The cable of claim 1, wherein: The cable has a frequency of up to 1000MHz, and The standard impedance deviation is measured with at least 350 tests in the range of 1.0 to 1000 MHz for a cable length of 99.97 meters or longer and is calculated at an intermediate or average impedance of 90 to 110 ohms. 3. The cable of claim 1, wherein: said cable has a rated frequency up to 600 MHz, and said standard impedance deviation is measured by at least 350 tests in the range of 1.0 to 600 MHz for 99.97 meters or longer of cable, and said standard impedance deviation is 3.5 or less , and is calculated between 90 and 110 ohms or average impedance. 4. The cable of claim 2, wherein: said cross-sectional void space is less than 18% of the cross-sectional area of said shielded twisted pair core, and The shielding strip has a metal thickness of 0.019 to 0.032 mm. 5. The cable of claim 3, wherein: said cross-sectional void space is less than 18% of the cross-sectional area of said shielded twisted pair core, and The shielding strip has a metal thickness of 0.019 to 0.032 mm. 6. The cable of claim 1, further comprising: At least four bundled longitudinal shielded twisted-pair cable cores, a jacket wrapped around said at least four bundled longitudinal shielded twisted pair cores to provide a high performance data cable; and The high-performance data cable, when adjusted to 20°C, has an average standard impedance deviation of 4.5 or less when the cable is 99.97 meters or longer, The standard impedance deviation is the average of the standard impedance deviations detected for each of the bundled longitudinally wrapped shielded twisted pair cables, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cores at an average impedance of 50 to 200 ohms. 7. The cable of claim 6, wherein: said high-performance data cables have a rated frequency of at least 600MHz, The shielding tape and tie wires are individually wrapped around the four twisted pairs to eliminate a large amount of air and to retain a cross-sectional void space (17) of each of the four twisted pairs smaller than that of each shielded pair 18% of the cross-sectional area of the twisted pair cable core, When the high-performance data cable is adjusted to 20°C, when the cable is 99.97 meters or longer, the average standard impedance deviation is 3.5 or less, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cores in the range of 1.0 to 600MHz and calculating the average impedance of 90 to 110 ohms, and the single standard impedance deviation Not greater than 6 compared to the average impedance. 8. The cable of claim 6, wherein: High performance data cables with a rated frequency of at least 1000MHz, The shielding tape and tie wires are individually wrapped around the four twisted pairs to eliminate a large amount of air and to retain a cross-sectional void space (17) of each of the four twisted pairs smaller than that of each shielded pair 18% of the cross-sectional area of the twisted pair cable core, When the high-performance data cable is adjusted to 20°C, when the cable is 99.97 meters or longer, the average standard impedance deviation is 4.5 or less, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cables in the range of 1.0 to 1000 MHz and calculating the average impedance of 90 to 110 ohms, and the single standard impedance deviation Not greater than 6 compared to the average impedance. 9. The cable of claim 6, wherein: The temperature-resistant and flame-retardant isolation tape is wrapped on the at least four bundled longitudinally wrapped shielded twisted-pair cable cores, and is between the sheath and the cable core, and The sheath is non-fluorinated polyolefin. 10. The cable of claim 6, wherein: said high-performance data cables have a rated frequency of at least 600MHz, The shielding tape and tie wires are individually wrapped around the four twisted pairs to eliminate a large amount of air and to retain a cross-sectional void space (17) of each of the four twisted pairs smaller than that of each shielded pair 18% of the cross-sectional area of the twisted pair cable core, when the high-performance data cable is adjusted to 20°C, when the cable is 99.97 meters or longer, the average standard impedance deviation is 3.5 or less, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cores in the range of 1.0 to 600MHz and calculating the average impedance of 90 to 110 ohms, and the single standard impedance deviation not greater than 6 compared to said average impedance, The temperature-resistant and flame-retardant isolation tape is wrapped on the at least four bundled longitudinally wrapped shielded twisted-pair cable cores, and is between the sheath and the cable core, and The sheath is non-fluorinated polyolefin. 11. The cable of claim 6, wherein: said high performance data cables have a rated frequency of at least 1000MHz, The shielding tape and tie wires are individually wrapped around the four twisted pairs to eliminate a large amount of air and to retain a cross-sectional void space (17) of each of the four twisted pairs smaller than that of each shielded pair 18% of the cross-sectional area of the twisted-pair cable core, when the high-performance data cable is adjusted to 20°C, when the cable is 99.97 meters or longer, the average standard impedance deviation is 4.5 or less, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cables in the range of 1.0 to 1000 MHz and calculating the average impedance of 90 to 110 ohms, and the single standard impedance deviation not greater than 6 compared to said average impedance, The temperature-resistant and flame-retardant isolation tape is wrapped on the at least four bundled longitudinally wrapped shielded twisted-pair cable cores, and is between the sheath and the cable core, and The sheath is non-fluorinated polyolefin. 12. An inflatable high performance data cable comprising: The cable core includes at least four twisted pair cores, each of which is longitudinally shielded and bundled to provide at least four bundled longitudinally shielded twisted pair cores, each of the shielding tapes binding the at least four twisted pair cores is longitudinally wrapped around the respective twisted pair with an overlap of at least 10%; Each of the shielding tapes is wrapped around the respective twisted pair with a certain tension to eliminate a large amount of air, and to reserve a cross-sectional void space less than 25% of the cross-sectional area of the shielded twisted pair cable core to provide Bundled longitudinally wrapped shielded twisted-pair data cables; and providing said bundled longitudinally wrapped shielded twisted-pair data cables are conditioned to 4.5 or less when calculating standard impedance deviations at a median or average impedance of 50 to 200 ohms said standard impedance deviation; A temperature-resistant and flame-retardant isolation tape is wrapped on the at least four bundled longitudinally wrapped shielded twisted-pair cable cores, and the isolation tape is located between the sheath and the cable core, and The sheath is non-fluorinated polyolefin. 13. The cable of claim 12, wherein: The cable has a rated frequency of at least 600MHz, and When the high-performance data cable is adjusted to 20°C, when the cable is 99.97 meters or longer, the average standard impedance deviation is 3.5 or less, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cores in the range of 1.0 to 600MHz and calculating the average impedance of 90 to 110 ohms, and the single standard impedance deviation Not greater than 6 compared to the average impedance. 14. The cable of claim 12, wherein: The cable has a rated frequency of at least 1000MHz, When the high-performance data cable is adjusted to 20°C, when the cable is 99.97 meters or longer, the average standard impedance deviation is 4.5 or less, The standard impedance deviation is calculated by performing at least 350 tests on each of the four bundled longitudinally wrapped shielded twisted-pair cables in the range of 1.0 to 1000 MHz and calculating the average impedance of 90 to 110 ohms, and the single standard impedance deviation Not greater than 6 compared to the average impedance. 15. A method of preparing individually bundled longitudinally wrapped twisted-pair data cables, comprising: providing a twisted pair cable core with insulation selected from the group consisting of foamed, non-foamed fluorocopolymers and polyolefins; Longitudinally wrapping said twisted pair with a metal shielding tape overlapping at least 10% of said shielding tape to provide a longitudinally wrapped shielded twisted pair cable core, said shielding tape having a metal thickness of 0.008 to 0.051 mm, said shielding tape The tape is selected from a metal tape, a first composite tape having a non-metallic base layer with a layer of metal on one side of said base layer, and a second composite tape having a non-metallic base layer and a layer of metal on both sides of said base layer in groups composed of bands; wrapping said longitudinally wrapped shielded twisted pair cores with fabric or metal binding wires to provide a bundled longitudinally wrapped shielded twisted pair core; and Wrap the longitudinally wrapped metal shield and binding wire with a certain tension, so that when the bundled longitudinally wrapped shielded twisted pair cable core is adjusted to 20°C, when the standard impedance deviation is detected for 99.97 meters or longer cables, it has Deviation from standard impedance of 4.5 or less where at least 350 tests were performed and the standard impedance calculation was performed at an intermediate or average impedance of 50 to 200 ohms. 16. The method of claim 15, wherein, The shielding strip has a metal thickness of 0.019 to 0.032 mm, wrapping and bundling twisted-pair cable cores such that the cross-sectional void space is less than 18%, and said cable has a rated frequency up to 600 MHz, performing said at least 350 detections in the range 1.0 to 600 MHz, and The standard impedance deviation is 3.5 or less and is calculated at a median or average impedance of 90 to 110 ohms, and a single deviation is no greater than 6 compared to the median or average impedance. 17. The method of claim 15, wherein, The shielding tape has a metal thickness of 0.019 to 0.032 millimeters, wraps and bundles the twisted pair cores to eliminate a large amount of air around the twisted pair cores so that the cross-sectional void space is less than 18%, and the cables with frequencies up to 1000MHz, performing said at least 350 detections in the range 1.0 to 1000 MHz, and The standard impedance deviation is 4.5 or less and is calculated at a median or average impedance of 90 to 110 ohms, and a single deviation is no greater than 6 compared to the median or average impedance. 18. The method of claim 15, further comprising: bundling at least four bundled longitudinal shielded twisted-pair cable cores, Extruded jacket over at least four individually bundled longitudinally wrapped shielded twisted pair bundled cores to provide a high performance data cable, and said at least four individually bundled longitudinally wrapped shielded twisted-pair cores are selected to provide said high performance data cable having a rated frequency up to 600 MHz when tested on a high performance data cable of 99.97 meter feet or longer, An average standard impedance deviation of 3.5 or less, where the standard impedance deviation is calculated on at least 350 tests of each of said at least four bundled longitudinally shielded twisted-pair cores and at an intermediate or average impedance of 90 to 110 ohms , and the average standard impedance deviation is the average of the standard impedance deviations measured for all four bundled longitudinally wrapped shielded twisted-pair cables. 19. The method of claim 15, further comprising: bundling at least four individually bundled longitudinally wrapped shielded twisted-pair cable cores, extruded jacket over at least four bundled shielded twisted pair bundled cores to provide a high performance data cable, and Selecting said at least four bundled longitudinally wrapped shielded twisted-pair cores to provide said high performance data cable having a rated frequency up to 1000 MHz, average standard an impedance deviation of 4.5 or less, where the standard impedance deviation is a calculation of at least 350 tests on each of said at least four bundled longitudinal shielded twisted-pair cores and an intermediate or average impedance of 90 to 110 ohms, and The average standard impedance deviation is the average of the standard impedance deviations measured for all four bundled longitudinally wrapped shielded twisted pair cores. 20. The method of claim 18, further comprising: Before extruding the sheath, wrapping a heat-resistant and flame-retardant isolation tape on at least four bundled longitudinally-wrapped shielded twisted-pair cores, such that the heat-resistant and flame-resistant isolation tape is located between the sheath and the cable core, and The sheath is non-fluorinated polyolefin. 21. The method of claim 19, further comprising: Before extruding the sheath, wrapping a heat-resistant and flame-retardant isolation tape on at least four bundled longitudinally-wrapped shielded twisted-pair cores, such that the heat-resistant and flame-resistant isolation tape is located between the sheath and the cable core, and The sheath is non-fluorinated polyolefin.

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