HK1046769B - High performance data cable and a plenum non-fluorinated jacket high performance data cable - Google Patents
High performance data cable and a plenum non-fluorinated jacket high performance data cable Download PDFInfo
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- HK1046769B HK1046769B HK02108152.5A HK02108152A HK1046769B HK 1046769 B HK1046769 B HK 1046769B HK 02108152 A HK02108152 A HK 02108152A HK 1046769 B HK1046769 B HK 1046769B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1091—Screens specially adapted for reducing interference from external sources with screen grounding means, e.g. drain wires
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Abstract
This invention deals with high preformance bound lateral shielded twisted pair cables (20, 25, 30) having a high performance data cable (10A and 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 {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
Technical Field
The present invention relates to a high performance data cable which can successfully transmit in the frequency range of 0.3MHz to 1200MHz, in particular in the range of 1.0 to 600MHz and/or 1.0 to 1000 MHz. The invention also relates to UL910 high performance gas filled (plenum) cables with non-fluorinated jackets. The invention relates in particular to a high-performance data cable having a longitudinally wrapped shielded twisted pair cable core. Also, the invention is particularly directed to at least a grade 5 UL910 cable having a non-fluorinated jacket and a heat resistant flame retardant tape on the inside circumference of the jacket.
Background
Existing high performance data cables typically use a heavy, stiff 0.051 millimeter (2 mil) thick aluminum tape with a 0.025 millimeter (1 mil) thick polyester (Mylar) substrate as the shield. The shield is wrapped around each unshielded twisted pair subset, wherein the lay length is equal to the length of the entire cable lay of the cable core, typically a lay length of 101.6 to 152.4 millimeters (4.0 to 6.0 inches). The belt is about 12.7 millimeters (0.5 inches) wide. The angle of application of the wrapping is shallow over the entire length of the cable lay (e.g. 127 mm, i.e. 5 inches) and the tape is nearly parallel to the longitudinal axis of the twisted pair. A typical cable has 4 pairs of twisted pair cores with a 40 to 65% tin-plated copper braid applied over the four pairs of twisted pair cores and a final thermoplastic jacket extruded over the braided pairs to complete the cable. The shallow application angle of the metallic shielding tape typically presents a problem of loosening the tape during the cabling operation prior to the wire binding or helical application of the drain wire.
Also, the belt generally does not follow the shape of the underlying twisted pair. Tape gaps are created as the wrapping is done over the unshielded twisted pair conductors, which can result in an inability to provide a sufficiently stable ground plane to meet industry standard electrical requirements, such as CENELEC pr EN 50288-4-1.
The known cable construction is mechanically unstable in static conditions and the electrical performance is not stable in installed conditions, since the integral braiding does not adequately ensure that the tape lap does not "flower" open when the cable is bent. This "blooming" will then also increase and further with the destruction of the ground plane will also affect the impedance/RL performance. This increases attenuation non-uniformity. The impedance value also deteriorates upon bending due to variations in the conductor core to core and ground plane. The higher the bandwidth requirements, the greater these problems.
It is known that no cable construction for high performance UL910 plenum data cables has a non-fluorinated jacket. Using fluorinated sheaths and temperature-resistant flame-retardant insulating tapes such as Nomex*(temperature resistant flame retardant nylon manufactured by DuPont corporation) in a gas-filled cableThe present invention has been used and sold by Belden wire and Cable company for the previous year. Nomex in its cable*The tape prevents the Fluorinated (FEP) jacket from dripping and producing high peak smoke values in the UL910 burn test.
Disclosure of Invention
In order to solve the problems of the prior art, the technical scheme of the invention is realized as follows:
an individually bundled twisted pair longitudinal shielded data cable comprising: an insulated twisted pair cable core, a shielding tape selected from the group consisting of a metal tape, a first composite tape having a non-metallic base layer and 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; the shielding tape is longitudinally wrapped around the individually twisted pair cable with at least 10% overlap; the fabric or the metal binding wire is wrapped on the shielding belt to provide a binding longitudinal-wrapping shielding twisted pair cable core; the shielding tape has a metal thickness of 0.008 to 0.051 millimeters; said shielding tape and binder are wrapped around said twisted pairs with a tension to eliminate substantial amounts of air and to preserve a cross-sectional void space that is less than 25% of the cross-sectional area of said shielded twisted pair cable cores to provide said bundled longitudinal wrap shielded twisted pair data cable; and providing said standard impedance deviation of 4.5 or less when said bundled longitudinal shielded twisted pair data cable is tuned to 20 ℃ when the standard impedance deviation is calculated at a mean or average impedance of 50 to 200 ohms.
An air-filled high performance data cable, comprising: the cable core comprises at least four twisted pair cables, each of said twisted pair cables being longitudinally shielded and bundled to provide at least four bundled longitudinally shielded twisted pair cables, the shielding tapes bundling said at least four twisted pair cables each being longitudinally wrapped around a respective twisted pair with an overlap of at least 10%; each of said shielding tapes wrapped around a respective twisted pair with a tension to eliminate substantial amounts of air and to retain a cross-sectional void space less than 25% of the cross-sectional area of said shielded twisted pair cable core to provide a bundled longitudinal wrap shielded twisted pair data cable; and providing said standard impedance deviation of 4.5 or less when said bundled longitudinal shielded twisted pair data cable is tuned to 20 ℃ when the standard impedance deviation is calculated at a mean or average impedance of 50 to 200 ohms; and the temperature-resistant flame-retardant isolation belt is wrapped on the at least four binding longitudinal covering shielding twisted pair cable cores, the isolation belt is positioned between the sheath and the cable cores, and the sheath is made of non-fluorinated polyolefin.
A method of making individually bundled longitudinal twisted pair data cables, comprising: providing a twisted pair cable having an insulation selected from the group consisting of foamed, non-foamed fluorocopolymer and polyolefin; longitudinally wrapping said twisted pairs with at least 10% overlap of said shielding tape with a metallic shielding tape having a metallic thickness of 0.008 to 0.051 mm to provide a longitudinally wrapped shielded twisted pair cable, said shielding tape being selected from the group consisting of a metallic tape, a first composite tape having a non-metallic base layer and 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; wrapping the longitudinal wrapped shielding twisted pair cable core by adopting a fabric or a metal binding wire to provide a bundled longitudinal wrapped shielding twisted pair cable core; and wrapping the longitudinal metal shield and the binder around the cable with a tension such that the bundled longitudinal shielded twisted pair cable has a standard impedance deviation of 4.5 or less when tuned to 20 ℃ when tested against said standard impedance deviation for 99.97 meters or more cable, wherein at least 350 tests are conducted and the standard impedance is calculated at a mean or average impedance of 50 to 200 ohms.
The present invention uses a longitudinally wrapped shielding tape with fiber or metal ties on each twisted pair cable core to meet the required impedance/RL, attenuation uniformity and capacitance imbalance.
The present invention eliminates the large amount of trapped gas typically found in shielded twisted pair cable cores. This can be accomplished by using a longitudinal wrap shield, preferably having a minimum of 10% overlap and having a metal layer of 0.008 to 0.051 mm (0.33 to 2.0 mils) thick, preferably 0.025 mm (1 mil). The longitudinal wrap shield may be held together by suitable binders and preferably by a fabric or metal braid or helical binder to provide a superior shield with improved impedance control. Short folds can be applied along the longitudinal seams of the shield to improve EMI/Rfi isolation, when desired. The resulting uniform ground plane along the length of the cable will make the capacitance imbalance better and improve the uniformity of attenuation by reducing RL reflections and capacitance imbalance.
The invention also provides substantial stability of the geometry in case of bending. The use of a dense longitudinal shield with at least 10% overlap and a fabric or metal binder eliminates tape gaps and blooming in bending situations. This establishes physical and electrical properties that are very stable under adverse use conditions. The twisted pair cable core to core distance of the present invention is shown in fig. 3 and the conductor to ground distance remains more stable than with prior art cables.
The cable of the present invention is particularly suitable for class 7 and higher performance cables. In particular, the cables of the present invention employ a longitudinal wrap shield and a binder and can be used for 600MHz or 1000 MHz. A typical high performance data cable when made according to the present invention has four (4) twisted pair cables, each of which is made of two single lines of foam or non-foam insulation (fluorocopolymer or polyolefin). Each twisted pair cable has a single longitudinal metal shielding tape wrapped around the cable and which forms a short, folded longitudinal seam in place of a binder such as a fabric or metal braid or a spiral wrap. When the braid is used as a binder, it is 40 to 95% braid. When a wire is used, it is preferably helically wound. The longitudinal wrap shield pairs are in the form of S-Z or planets in the form of bundles or bundles. The bundled wire pairs may be bundled by an overall 40-95% braiding or winding. Finally a thermoplastic jacket (a fluoro-copolymer or a polyolefin or polyvinyl chloride) is extruded over the bundle of twisted pair cables.
Typically, the metal shield is an aluminum tape or a composite tape such as a short folded BELDFOIL tape (which is a type of shield in which a metal foil or overlay is applied on one side of a supporting plastic film), or a DUOFOIL tape (which is a type of shield in which a metal foil or overlay is applied on both sides of a supporting plastic film), or a 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 is preferably about 0.025 mm (1.0 mil). Although aluminum may be used, any metal suitable for the metal or composite strip may be used, such as copper, copper alloys, silver, nickel, and the like. Each twisted pair may be metal-faced outward and the lap may be 10 to 50% as practical, although the best form of wrapping is about 25% lap. The shield, which provides the best attenuation and impedance properties, is preferably engaged to provide the disconnect. And the short fold can be eliminated by adopting proper lap joint.
The number of pairs of shield strands in a high performance data cable is typically 4-8 pairs, which may then be more as desired. The tension of the longitudinal shield and binder is such that the wrapped shield and binder eliminate more air to provide a standard impedance deviation for the longitudinal shield twisted pairs to the core and an average standard impedance deviation for a high performance data cable having many longitudinal shield twisted pairs. The tension on the shield tapes and binders is such that the overall cross-sectional area of the longitudinal shielded twisted pairs taken at any point along the length of the cable has a void space of only 25% or less and preferably 18% or less.
The present invention provides a high performance twisted pair data cable having a shield longitudinally wrapped around an unshielded twisted pair cable core and a fabric or metal braid or yarn simultaneously wrapped around the longitudinally wrapped shield for bundling the shield. The shields and binders (braided or bundled) are wrapped with tension such that for each twisted pair available on its own, the twisted pair has an unfavorable impedance with a nominal or standard impedance deviation for a longitudinally wrapped shielded twisted pair cable, a standard impedance deviation of 3.5 or less in the range of 1.0 to 600MHz and no single impedance deviation greater than 6.0 for a 600MHz or greater cable, and a standard impedance deviation of 4.5 or less in the range of 1.0 to 1000MHz and no single impedance deviation greater than 6.0 for a 1000MHz or greater cable. A high performance data cable having a plurality of longitudinally shielded twisted pair cores with a mean standard impedance deviation of 3.5 or less for all longitudinally shielded twisted pairs in the range of 1.0 to 600MHz for cores above 600MHz and a single standard deviation of greater than 6.0 for any core. A high performance data cable having a plurality of longitudinally shielded twisted pair cores with a mean standard impedance deviation of 4.5 or less for all longitudinally shielded twisted pairs in the range of 1.0 to 1000MHz for cores above 1000MHz and a single standard deviation of greater than 6.0 for any core. The standard impedance deviation may be calculated around a median or average impedance of 50 to 200 ohms and at least 350 tests are performed for a cut 99.97 meter (328 feet) or longer cable.
Also, the present invention provides a high performance data cable having the capability of a high performance data plenum cable, which may be designated as UL 910. The cable preferably has a non-fluorinated jacket and a temperature resistant flame retardant insulating tape underlying the jacket and contiguous with the jacket. Other advantages of the present invention will be more clearly understood from the detailed description taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a perspective view of a twisted pair cable used in the present invention;
FIG. 2 is a perspective view of a longitudinal twisted pair cable according to the present invention;
FIG. 3 is an enlarged cross-sectional view taken along line 3-3 of FIG. 2;
FIG. 4A is an enlarged cross-sectional view of a braided longitudinal shielded twisted pair cable according to the present invention;
FIG. 4B is an enlarged cross-sectional view of a binder longitudinal shielded twisted pair cable according to the present invention;
FIG. 5 is a cross-sectional view of a cable including the four cores of FIG. 4A;
FIG. 6 is a perspective view of the cable of FIG. 5;
FIG. 7 is a cross-sectional view of a cable including the four cores of FIG. 4B; and
fig. 8 is a perspective view of one of the air-filled UL910 high performance data cables of the present invention.
Detailed Description
Figure 1 shows a twisted pair cable 10 having conductor pairs 12 and 13, which are preferably solid copper conductors and may be any suitable conductors for high performance data cables. Each conductor 12 and 13 has extruded thereon suitable insulation 14 and 15 which may be a foamed or unfoamed fluoropolymer or a suitable polyolefin.
Fig. 2 shows the twisted pair of fig. 1 with a metallic shield 16 tightly wrapped thereon. The metallic shield may be any suitable shield such as a metallic tape or a composite tape having a non-metallic base layer such as polyester (MYLAR polyester film) with a metal typically used for cable shielding on one or both sides of the non-metallic base layer. The metals used for the belt or composite belt are aluminum, copper alloys, nickel, silver, and the like. The thickness of the entire metal is 0.008 to 0.051 mm (0.33 to 2.0 mils), and preferably 0.025 mm (1.0 mil). The shield is a metal shield, such as a short folded BELDFOIL tape, or DOUFOIL tape, which is a tape with metal on both sides of the tape.
The tape 16 is wrapped with sufficient pressure, as shown in fig. 3, so as not to crush the 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. 3. 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 a longitudinal wrap shielded twisted pair cable 10A. The tape 16 is wrapped with a slight overlap and preferably a short fold. As noted above, the preferred thickness of the aluminum or metal is 0.025 millimeters (1 mil). The width of the tape is sufficient to provide a minimum overlap of 10%.
As shown in fig. 4A and 4B, the shielded twisted pair cable 10A (fig. 3) is held tightly together by a binder 18 or 18' to provide a bound shielded cable core 10B and 10C. The tension on the tape and wrap 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 distort the insulation 14 and 15. The longitudinal wrapping and bundling is performed under tension such that it eliminates a significant amount of air from within the coated shielded twisted pair cables 10B and 10C. This provides a dense overall cross-section with void spaces 17 at any point along the length of the cable. The dense coating may provide a standard impedance deviation and a mean standard impedance deviation as described above.
The insulation is preferably a foamed fluorocopolymer having a thickness of 0.010-0.060 inches, preferably having a thickness of 0.015 to 0.020 inches. The individual conductors 12 and 13 are typically 0.518 to 0.0509 square millimeters (20 to 30AWG) and preferably 0.326 to 0.205 square millimeters (22 to 24 AWG).
The wire may be solid or stranded, and is preferably solid. The lay lengths may be the same or different for all four twisted pair cables 10 and may be right and/or left twisted. The lay is preferably 0.3-2.0 inches. The lay of the entire cable is typically 10 to 20 times the average core diameter of the cable.
Dressing 18 may be a fabric (e.g., Aramid) or a metal braid, which is preferably 40-95% braid. The metal is preferably 45-65% tin-plated copper braid, but it may also be any type of metal braid suitable for high performance cables such as type 7 data cables, such as copper, copper alloy, bronze (a copper alloy where the alloying elements are other than nickel or zinc), silver, and the like.
Wrap 18' is a fiber yarn (Aramide aramid) that is helically wound to provide 40-95% coverage. Preferably, the present invention uses Aramid 760 count fibers having a pitch of 1/4 inches.
Referring to fig. 5, the wrapped shielded cable cores 10B and 10C have extruded sheaths 19 to produce the high performance data cable 20 of the present invention. The jacket may be any suitable cable jacket material, which may be a thermoplastic material suitable for grade 7 cable, such as flame retardant polyethylene, polyvinyl chloride, fluorocopolymer, and the like.
Figure 6 shows a cable 20 having four braided shielded twisted pair cables 10B. An optional ground wire 21 is located between the cable cores 10B. The ground wire is laid in any suitable position, such as just under the jacket and/or for bundling four braided shield cores 10B.
Figure 7 shows a cable 25 having four wrapped shielded twisted pair cables 10C. The four covered shielded twisted pair cables 10C may be further wrapped or bundled with a metal or braid 22. The braid 22 is generally of the same type as the braid 18 described above. An optional ground wire 21 is located between the cable cores 10C. As mentioned above, the ground line may be located in any suitable position, such as just under the jacket and/or for bundling four coated shielded cable cores 10C.
Fig. 8 shows a cable 30 having a jacket 26 under which a separator 27 is wrapped in a spiral or longitudinal fashion. The separator 27 is wrapped around the four twisted pair coated shielded cable core 10C and its binder braid 22. The jacket 26 is a non-fluorinated jacket such as polyvinyl chloride. The separator 27 is a temperature-resistant flame-retardant separator, such as Nomex*. The cable is constructed similarly to the cable of fig. 7, except that the cable has a separator 27 and does not have a fluorinated jacket. When desired, a plurality of these non-metal braided or shielded twisted pair cables may be bundled or wrapped with the ground wire 21. The bundled twisted pair cable is then wrapped around the separator tape and extruded through the jacket 26.
As shown in inventive examples 1-7, the high performance braided longitudinal shielded twisted pair cable had an unsuitable impedance having a standard impedance deviation of 3.5 or less when measured at least 350 times from 1.0 to 600MHz for cables above 600MHz and a standard impedance of 4.5 or less when measured at least 350 times from 1.0 to 1000MHz for cables above 1000 MHz. A high performance data cable having a plurality of braided-shielded twisted pair cores has an average impedance deviation of 3.5 or less over the range of 1.0 to 600MHz and 4.5 or less over the range of 1.0 to 1000MHz for all braided-shielded twisted pairs and a single standard impedance deviation of no greater than 6.0. The tests performed for all of the examples were impedance tests as per CENELEC requirements and were performed for a 99.97 meter (328 foot) length of bundled shielded twisted pair cable in which the shielding was wrapped longitudinally to provide a twisted pair cable 10A. The longitudinal wrap shield was a BELDFOIL tape having an aluminum thickness of 0.025 millimeters (1 mil). The tape was wrapped longitudinally with a slight overlap. The longitudinal wrapping tape can be bundled by adopting a metal braided fabric. The assay was started at 0.3MHz and at least three hundred fifty assays (350) were performed in the range of about 1 to 600MHz for examples 1 and 8 and in the range of about 1.0 to 1000MHz for examples 2-7. The cable wires 12 and 13 are 0.326 square millimeter (22AWG) solid copper and the insulation 14 and 15 is FEP. Measurements were made at various temperatures and adjusted to 20 ℃. All cables had less than 18% void space and were tested near an average impedance of 100 ohms.
Example 1
The braided-shielded twisted pair cable 10B, which was 99.97 meters (328 feet) long, 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 between 1.0 to 600 MHz. Braided-shielded twisted pair cables were tested and had a standard impedance deviation of 1.7714 around 95.2619 mean impedance.
Example 2
The braided-shielded twisted pair cable 10B, which was 99.97 meters (328 feet) long, was tested at 23.3 c. The cable impedance measurements are made in the range of 0.3 to 1000MHz and at least 350 measurements are made between 1.0 to 1000 MHz. Braided-shielded twisted pair cables were tested and had a standard impedance deviation of 2.8565 around 94.3178 mean impedance.
Example 3
The high performance data cable 20 described above having a length of 99.97 meters (328 feet) with four braided-shielded twisted pair cables 10B was tested at 23.9 c. The impedance of each braided twisted pair cable was measured in the range of 0.3 to 1000 MHz. At least 350 detections are made in the range of 1.0 to 1000 MHz. The following data were adjusted to 20 ℃.
The first braided-shielded twisted pair cable had a standard impedance deviation of 4.2744 taken around a mean impedance of 100.5321.
The second braided-shielded twisted pair cable had a standard impedance deviation of 5.1630 taken around a mean impedance of 100.5321.
The third braided-shielded twisted pair cable had a standard impedance deviation of 4.0469 taken around a mean impedance of 101.4583.
The fourth braided-shielded twisted pair cable had a standard impedance deviation of 4.3360 taken around a mean 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
The high performance data cable 20 described above having a length of 99.97 meters (328 feet) with four braided-shielded twisted pair cables 10B was tested at 23.9 c. The impedance of each braided twisted pair cable was measured in the range of 0.3 to 1000 MHz. At least 350 detections are made in the range of 1.0 to 1000 MHz. The following data were adjusted to 20 ℃.
The first braided-shielded twisted pair cable had a standard impedance deviation of 4.0430 taken around a mean impedance of 101.1783.
The second braided-shielded twisted pair cable had a standard impedance deviation of 4.0027 taken around a mean impedance of 101.3086.
The third braided-shielded twisted pair cable had a standard impedance deviation of 3.6038 taken around a mean impedance of 101.7716.
The fourth braided-shielded twisted pair cable had a standard impedance deviation of 4.0092 taken around a mean 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
The high performance data cable 20 described above having a length of 99.97 meters (328 feet) with four braided-shielded twisted pair cables 10B was tested at 23.9 c. The impedance of each braided twisted pair cable was measured in the range of 0.3 to 1000 MHz. At least 350 detections are made in the range of 1.0 to 1000 MHz. The following data were adjusted to 20 ℃.
The first braided-shielded twisted pair cable had a standard impedance deviation of 3.2469 taken around a mean impedance of 199.2035.
The second braided-shielded twisted pair cable had a standard impedance deviation of 4.2070 taken around a mean impedance of 100.9596.
The third braided-shielded twisted pair cable had a standard impedance deviation of 3.4690 taken around a mean impedance of 102.8214.
The fourth braided-shielded twisted pair cable had a standard impedance deviation of 3.8990 taken around a mean 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
The high performance data cable 20 described above having a length of 99.97 meters (328 feet) with four braided-shielded twisted pair cables 10B was tested at 24.2 c. The impedance of each braided twisted pair cable was measured in the range of 0.3 to 1000 MHz. At least 350 detections are made in the range of 1.0 to 1000 MHz. The following data were adjusted to 20 ℃.
The first braided-shielded twisted pair cable had a standard impedance deviation of 4.0488 taken around a mean impedance of 101.4423.
The second braided-shielded twisted pair cable had a standard impedance deviation of 4.2081 taken around a mean impedance of 100.9498.
The third braided-shielded twisted pair cable had a standard impedance deviation of 4.5567 taken around a mean impedance of 102.0121.
The fourth braided-shielded twisted pair cable had a standard impedance deviation of 3.6408 taken around a mean 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
The high performance data cable 20 described above having a length of 99.97 meters (328 feet) with four braided-shielded twisted pair cables 10B was tested at 24.2 c. The impedance of each braided twisted pair cable was measured in the range of 0.3 to 1000 MHz. At least 350 detections are made in the range of 1.0 to 1000 MHz. The following data were adjusted to 20 ℃.
The first braided-shielded twisted pair cable had a standard impedance deviation of 3.6939 taken around a mean impedance of 102.0776.
The second braided-shielded twisted pair cable had a standard impedance deviation of 3.8658 taken around a mean impedance of 100.4614.
The third braided-shielded twisted pair cable had a standard impedance deviation of 3.5208 taken around a mean impedance of 99.7808.
The fourth braided-shielded twisted pair cable had a standard impedance deviation of 3.9835 taken around a mean 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
The high performance data cable 20 described above having a length of 99.97 meters (328 feet) with four braided-shielded twisted pair cables 10B was tested at 24.4 c. The impedance of each braided twisted pair cable was measured in the range of 0.3 to 600 MHz. At least 350 detections are made in the range between 1.0 and 600 MHz. The following data were adjusted to 20 ℃.
The first braided-shielded twisted pair cable had a standard impedance deviation of 3.5621 taken around a mean impedance of 102.2971.
The second braided-shielded twisted pair cable had a standard impedance deviation of 3.9185 taken around a mean impedance of 103.9484.
The third braided-shielded twisted pair cable had a standard impedance deviation of 2.6943 taken around a mean impedance of 103.2519.
The fourth braided-shielded twisted pair cable had a standard impedance deviation of 2.5206 taken around a mean impedance of 102.9625.
The high performance data cable 20 of this example had an average impedance deviation of 3.1739((3.5621+3.9185+2.6943+ 2.5206)/4).
Example 9
The UL910 test was performed on the two cables of fig. 8. Each cable has four twisted pair-wrapped shielded cable cores 10C. The shield 16 of each cable core was a 0.051 mm (2 mil) aluminum/0.0125 mm (0.5 mil) polyester tape having a width of 15.875 mm (0.625 inch). Each shield 16 is strapped around an Aramid 760 wrap. The four wrapped and bundled shielding cable cores are wrapped by 40% tinned copper braided fabric. The four braided bundled cables were wrapped with 0.051 mm (2 mil) Nomex tape, which was 1.250 inches wide. On the release tape was an extruded polyvinyl chloride jacket. Both cables passed the UL910 plenum test. In the UL910 plenum test, the first cable showed a flame (flame) of 38.1 millimeters (1.5 inches), a peak (peak) of 0.32, and an average P/F of 0.09. The second cable showed a flame (flame) of 38.1 millimeters (1.5 inches), a peak (peak) of 0.29, and an average P/F of 0.09. Two cables would be listed as class 7 cables, which have rates above 1000 MHz.
While the present invention has been tested for UL910 for at least a class 5 air-filled high performance data cable for UL910 for the cable shown in fig. 8 for a class 7 cable, it is to be understood that the present invention is not limited to this particular construction of the cable, but it can relate to any class 5 or higher cable that uses a non-fluorinated jacket, such as a polyvinyl chloride jacket, and also has a temperature-resistant flame-retardant release tape between the jacket and the cable. For example, the present invention provides a UL910 plenum high performance data cable having a nominal frequency of 600MHz or greater, having the structure disclosed in the present co-pending application wherein a helically shielded twisted pair cable core is densely wound and a non-fluorinated jacket such as a polyvinyl chloride jacket is used in the cable and a temperature resistant flame retardant separator tape is between the jacket and the cable core. The UL910 plenum at least grade 5 high performance data cable of the present invention is not limited to the cable core described above, but for UL910 plenum at least grade 5 high performance data cables may have a non-fluorinated jacket and may have a temperature-resistant flame-retardant separator between the jacket and the cable core.
It will of course be appreciated that embodiments have been described with reference to the accompanying drawings, but that the invention is not limited to the specific embodiments described above. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention as defined in the appended claims.
Claims (21)
1. An individually bundled twisted pair longitudinal shielded data cable comprising:
the twisted pair cable core is insulated and twisted,
a shielding tape selected from the group consisting of a metal tape, a first composite tape having a non-metallic base layer and a layer of metal on one side of the base layer, and a second composite tape having a non-metallic base layer and a layer of metal on both sides of the base layer;
the shielding tape is longitudinally wrapped around the individually twisted pair cable with at least 10% overlap;
the fabric or the metal binding wire is wrapped on the shielding belt to provide a binding longitudinal-wrapping shielding twisted pair cable core;
the shielding tape has a metal thickness of 0.008 to 0.051 millimeters;
said shielding tape and binder are wrapped around said twisted pairs with a tension to eliminate substantial amounts of air and to preserve a cross-sectional void space that is less than 25% of the cross-sectional area of said shielded twisted pair cable cores to provide said bundled longitudinal wrap shielded twisted pair data cable; and
providing said standard impedance deviation of 4.5 or less when said bundled longitudinal shielded twisted pair data cable is tuned to 20 ℃ when calculating said standard impedance deviation at a mean or average impedance of 50 to 200 ohms.
2. The cable of claim 1, wherein,
the cable has a frequency of up to 1000MHz, and
the standard impedance deviation is measured for at least 350 measurements over a range of 1.0 to 1000MHz for a 99.97 meter or longer cable and is calculated for a mean or average impedance of 90 to 110 ohms.
3. The cable of claim 1, wherein,
the cable has a nominal frequency of up to 600MHz, and the standard impedance deviation is measured for at least 350 tests in the range of 1.0 to 600MHz for a 99.97 meter or longer cable, and is 3.5 or less and is calculated at a 90 to 110 ohm mid-or average impedance.
4. The cable of claim 2, wherein,
said cross-sectional void space being less than 18% of the cross-sectional area of said shielded twisted pair cable, and
the shielding tape has a metal thickness of 0.019 to 0.032 mm.
5. The cable of claim 3, wherein,
said cross-sectional void space being less than 18% of the cross-sectional area of said shielded twisted pair cable, and
the shielding tape has a metal thickness of 0.019 to 0.032 mm.
6. The cable of claim 1, further comprising:
at least four of said bundled longitudinally wrapped shielded twisted pair cables,
the sheath is wrapped on the at least four bundled longitudinal-wrapped shielding twisted pair cable cores to provide a high-performance data cable; and
the high performance data cable has an average standard impedance deviation of 4.5 or less when tuned to 20 ℃ when taken from 99.97 meters or more,
the standard impedance deviation is the average of the standard impedance deviations measured for each of the bundled longitudinal shielded twisted pair cables,
the standard impedance deviation was calculated for each of the four bundled longitudinal shielded twisted pair cables using at least 350 measurements and a mean impedance of 50 to 200 ohms.
7. The cable of claim 6, wherein,
the high performance data cable is rated for at least 600MHz,
said shielding tape and binder being individually wrapped around said four twisted pairs to eliminate substantial amounts of air and to retain a cross-sectional void space (17) of each of said four twisted pairs less than 18% of the cross-sectional area of each shielded twisted pair cable core,
the high performance data cable has an average standard impedance deviation of 3.5 or less when tuned to 20 ℃ when taken for 99.97 meters or more,
the standard impedance deviation is calculated for each of the four bundled longitudinally shielded twisted pair cables for at least 350 tests in the range of 1.0 to 600MHz and for an average impedance of 90 to 110 ohms, and a single standard impedance deviation is no greater than 6 compared to the average impedance.
8. The cable of claim 6, wherein,
high performance data cables are rated for at least 1000MHz,
said shielding tape and binder being individually wrapped around said four twisted pairs to eliminate substantial amounts of air and to retain a cross-sectional void space (17) of each of said four twisted pairs less than 18% of the cross-sectional area of each shielded twisted pair cable core,
the high performance data cable has an average standard impedance deviation of 4.5 or less when tuned to 20 ℃ when taken for 99.97 meters or more,
the standard impedance deviation is calculated for each of the four bundled longitudinally shielded twisted pair cables for at least 350 tests in the range of 1.0 to 1000MHz and for an average impedance of 90 to 110 ohms, and a single standard impedance deviation is no greater than 6 compared to the average impedance.
9. The cable of claim 6, wherein,
a temperature-resistant flame-retardant isolation tape is wrapped on the at least four bundled longitudinal-wrapped shielding twisted pair cable cores, between the sheath and the cable cores, and
the jacket is a non-fluorinated polyolefin.
10. The cable of claim 6, wherein,
the high performance data cable is rated for at least 600MHz,
said shielding tape and binder being individually wrapped around said four twisted pairs to eliminate substantial amounts of air and to maintain a cross-sectional void space (17) of each of said four twisted pairs less than 18% of the cross-sectional area of the core of each shielded twisted pair, said high performance data cable having an average standard impedance deviation of 3.5 or less when tuned to 20 ℃ when taken with 99.97 meters or more,
the standard impedance deviation is calculated for each of said four bundled longitudinally shielded twisted pair cables at least 350 tests in the range of 1.0 to 600MHz and at a mean impedance of 90 to 110 ohms, and a single standard impedance deviation is no greater than 6 compared to said mean impedance,
a temperature-resistant flame-retardant isolation tape is wrapped on the at least four bundled longitudinal-wrapped shielding twisted pair cable cores, between the sheath and the cable cores, and
the jacket is a non-fluorinated polyolefin.
11. The cable of claim 6, wherein,
the high performance data cable is rated for at least 1000MHz,
said shielding tape and binder being individually wrapped around said four twisted pairs to eliminate substantial amounts of air and to maintain a cross-sectional void space (17) of each of said four twisted pairs less than 18% of the cross-sectional area of the core of each shielded twisted pair, said high performance data cable having an average standard impedance deviation of 4.5 or less when tuned to 20 ℃ when taken with 99.97 meters or more,
the standard impedance deviation is calculated for each of said four bundled longitudinally shielded twisted pair cables at least 350 tests in the range of 1.0 to 1000MHz and at a mean impedance of 90 to 110 ohms, and a single standard impedance deviation is no greater than 6 compared to said mean impedance,
a temperature-resistant flame-retardant isolation tape is wrapped on the at least four bundled longitudinal-wrapped shielding twisted pair cable cores, between the sheath and the cable cores, and
the jacket is a non-fluorinated polyolefin.
12. An air-filled high performance data cable, comprising:
the cable core comprises at least four twisted pair cables, each of said twisted pair cables being longitudinally shielded and bundled to provide at least four bundled longitudinally shielded twisted pair cables,
each of the shielding tapes bundling the at least four twisted pair cables is longitudinally wrapped around the respective twisted pair with an overlap of at least 10%;
each of said shielding tapes wrapped around a respective twisted pair with a tension to eliminate substantial amounts of air and to retain a cross-sectional void space less than 25% of the cross-sectional area of said shielded twisted pair cable core to provide a bundled longitudinal wrap shielded twisted pair data cable; and providing said standard impedance deviation of 4.5 or less when said bundled longitudinal shielded twisted pair data cable is tuned to 20 ℃ when the standard impedance deviation is calculated at a mean or average impedance of 50 to 200 ohms;
a temperature-resistant flame-retardant isolation belt is wrapped on the at least four bundled longitudinal-wrapped shielding twisted pair cable cores, the isolation belt is positioned between the sheath and the cable cores, and
the jacket is a non-fluorinated polyolefin.
13. The cable of claim 12, wherein,
said cable having a nominal frequency of at least 600MHz, and
the high performance data cable has an average standard impedance deviation of 3.5 or less when tuned to 20 ℃ when taken for 99.97 meters or more,
the standard impedance deviation is calculated for each of the four bundled longitudinally shielded twisted pair cables for at least 350 tests in the range of 1.0 to 600MHz and for an average impedance of 90 to 110 ohms, and a single standard impedance deviation is no greater than 6 compared to the average impedance.
14. The cable of claim 12, wherein,
the cable is rated for at least 1000MHz,
the high performance data cable has an average standard impedance deviation of 4.5 or less when tuned to 20 ℃ when taken for 99.97 meters or more,
the standard impedance deviation is calculated for each of the four bundled longitudinally shielded twisted pair cables for at least 350 tests in the range of 1.0 to 1000MHz and for an average impedance of 90 to 110 ohms, and a single standard impedance deviation is no greater than 6 compared to the average impedance.
15. A method of making individually bundled longitudinal twisted pair data cables, comprising:
providing a twisted pair cable having an insulation selected from the group consisting of foamed, non-foamed fluorocopolymer and polyolefin;
longitudinally wrapping said twisted pairs with at least 10% overlap of said shielding tape with a metallic shielding tape having a metallic thickness of 0.008 to 0.051 mm to provide a longitudinally wrapped shielded twisted pair cable, said shielding tape being selected from the group consisting of a metallic tape, a first composite tape having a non-metallic base layer and 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;
wrapping the longitudinal wrapped shielding twisted pair cable core by adopting a fabric or a metal binding wire to provide a bundled longitudinal wrapped shielding twisted pair cable core; and
the longitudinal metal shield and binder are wrapped with tension such that said bundled longitudinal shielded twisted pair cable has a standard impedance deviation of 4.5 or less when tuned to 20 ℃ when said standard impedance deviation is measured on 99.97 meters or longer cable, wherein at least 350 measurements are taken and the standard impedance is calculated at a mean or average impedance of 50 to 200 ohms.
16. The method of claim 15, wherein,
the shielding tape has a metal thickness of 0.019 to 0.032 mm,
wrapping and bundling the twisted pair cables such that the cross-sectional void space is less than 18%, and said cable having a nominal frequency of up to 600MHz,
said at least 350 detections are in the range of 1.0 to 600MHz, and
the standard impedance deviation is 3.5 or less and is calculated at a mean or average impedance of 90 to 110 ohms, and the single deviation is no greater than 6 compared to the mean or average impedance.
17. The method of claim 15, wherein,
the shielding tape having a metal thickness of 0.019 to 0.032 millimeters, wrapping and bundling the twisted pair cables to eliminate a substantial amount of air around the twisted pair cables such that the cross-sectional void space is less than 18%, and the cable having a frequency of up to 1000MHz,
said at least 350 detections are in the range of 1.0 to 1000MHz, and
the standard impedance deviation is 4.5 or less and is calculated at a mean or average impedance of 90 to 110 ohms, and the single deviation is no greater than 6 compared to the mean or average impedance.
18. The method of claim 15, further comprising:
bundling at least four of said bundled longitudinal shielded twisted pair cables,
extruding a jacket over at least four individually bundled longitudinal shielded twisted pair bundled cables to provide a high performance data cable, and
selecting said at least four individual bundled longitudinal shielded twisted pair cables to provide said high performance data cable having a nominal frequency of up to 600MHz, an average standard impedance deviation of 3.5 or less when tested at 99.97 meters feet or greater high performance data cable, wherein standard impedance deviation is the average of said standard impedance deviations measured for all four bundled longitudinal shielded twisted pair cables and measured at least 350 tests per each of said at least four bundled longitudinal shielded twisted pair cables and at a median or average impedance of 90 to 110 ohms.
19. The method of claim 15, further comprising:
bundling at least four of said individually bundled longitudinally wrapped shielded twisted pair cables,
extruding a jacket over at least four of the bundled shielded twisted pair cables to provide a high performance data cable, and
selecting said at least four bundled longitudinal shielded twisted pair cables to provide said high performance data cable having a nominal frequency of up to 1000MHz, an average standard impedance deviation of 4.5 or less when tested on a 99.97 meter or longer high performance data cable, wherein standard impedance deviation is the average of said standard impedance deviations measured on all four bundled longitudinal shielded twisted pair cables for at least 350 tests and at a median or average impedance of 90 to 110 ohms.
20. The method of claim 18, further comprising:
wrapping a heat-resistant flame-retardant separation tape around at least four of the bundled longitudinal shielded twisted pair cables before extruding the sheath, such that the heat-resistant flame-retardant separation tape is located between the sheath and the cable cores, and
the jacket is a non-fluorinated polyolefin.
21. The method of claim 19, further comprising:
wrapping a heat-resistant flame-retardant separation tape around at least four of the bundled longitudinal shielded twisted pair cables before extruding the sheath, such that the heat-resistant flame-retardant separation tape is located between the sheath and the cable cores, and
the jacket is a non-fluorinated polyolefin.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14499899P | 1999-07-22 | 1999-07-22 | |
| US60/144,998 | 1999-07-22 | ||
| PCT/US2000/016344 WO2001008167A1 (en) | 1999-07-22 | 2000-06-14 | High performance data cable and a ul 910 plenum non-fluorinated jacket high performance data cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HK1046769A1 HK1046769A1 (en) | 2003-01-24 |
| HK1046769B true HK1046769B (en) | 2005-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HK02108152.5A HK1046769B (en) | 1999-07-22 | 2000-06-14 | High performance data cable and a plenum non-fluorinated jacket high performance data cable |
Country Status (20)
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|---|---|
| EP (1) | EP1208572A4 (en) |
| JP (1) | JP3725823B2 (en) |
| KR (1) | KR100671184B1 (en) |
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| DE102006039604A1 (en) * | 2006-08-24 | 2008-02-28 | Weidmüller Interface GmbH & Co. KG | Cable, connector with cable and method of making the cable |
| FR2913840B1 (en) * | 2007-03-13 | 2009-08-28 | Sagem Comm | AUDIO AND VIDEO DATA BROADCASTING DEVICE |
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| CN102364613A (en) * | 2011-10-08 | 2012-02-29 | 江苏亨通电力电缆有限公司 | Method for manufacturing metal shielding layer of 'SZ' type copper-wire-shielded medium-voltage cable |
| CN104252915B (en) * | 2013-06-28 | 2017-10-20 | 日立金属株式会社 | Differential signal transmission cable |
| US20150075838A1 (en) * | 2013-09-19 | 2015-03-19 | Tyco Electronics Corporation | Cables for a cable bundle |
| US20160027558A1 (en) * | 2014-01-28 | 2016-01-28 | Delphi Technologies, Inc. | Tape Wrapped Unshielded Twisted Pair Cable For High Speed Data Transmissions |
| WO2016149349A1 (en) * | 2015-03-16 | 2016-09-22 | Hitachi Cable America, Inc. | Extended frequency range balanced twisted pair transmission line or communication cable |
| CN105510349A (en) * | 2016-01-20 | 2016-04-20 | 深圳市特发信息股份有限公司 | Intelligent processing system for cable jacket defects |
| WO2017132327A1 (en) | 2016-01-27 | 2017-08-03 | Hitachi Cable America, Inc. | Extended frequency range balanced twisted pair transmission line or communication cable |
| CN105957634A (en) * | 2016-06-29 | 2016-09-21 | 王根顺 | Frameless Ethernet cable |
| CN114242306B (en) * | 2017-11-08 | 2024-03-15 | 株式会社自动网络技术研究所 | Wire conductors, covered wires, wire harnesses |
| EP3547331B1 (en) * | 2018-03-28 | 2022-03-16 | General Cable Technologies Corporation | Fire resistant data communication cable |
| JP7234708B2 (en) | 2019-03-13 | 2023-03-08 | 株式会社オートネットワーク技術研究所 | Shielded wire for communication |
| KR102691836B1 (en) * | 2022-11-11 | 2024-08-06 | 주식회사 해광케이블 | twisted pair cable |
| CN116094548B (en) * | 2023-04-11 | 2023-06-13 | 深圳市联嘉祥科技股份有限公司 | Cable transmission performance analysis method, device and electronic equipment based on test data |
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-
2000
- 2000-06-14 ES ES200250011A patent/ES2211355B1/en not_active Expired - Fee Related
- 2000-06-14 WO PCT/US2000/016344 patent/WO2001008167A1/en not_active Ceased
- 2000-06-14 BR BRPI0012603-9A patent/BR0012603B1/en not_active IP Right Cessation
- 2000-06-14 CH CH00099/02A patent/CH695074A5/en not_active IP Right Cessation
- 2000-06-14 KR KR1020017016776A patent/KR100671184B1/en not_active Expired - Fee Related
- 2000-06-14 IL IL14699300A patent/IL146993A0/en active IP Right Grant
- 2000-06-14 CZ CZ20020180A patent/CZ301188B6/en not_active IP Right Cessation
- 2000-06-14 EP EP00939861A patent/EP1208572A4/en not_active Withdrawn
- 2000-06-14 PL PL352254A patent/PL197026B1/en not_active IP Right Cessation
- 2000-06-14 AU AU54877/00A patent/AU770298B2/en not_active Ceased
- 2000-06-14 CN CN008106967A patent/CN1216384C/en not_active Expired - Fee Related
- 2000-06-14 HU HU0201703A patent/HU225924B1/en not_active IP Right Cessation
- 2000-06-14 HK HK02108152.5A patent/HK1046769B/en not_active IP Right Cessation
- 2000-06-14 NZ NZ515979A patent/NZ515979A/en not_active IP Right Cessation
- 2000-06-14 CA CA002376973A patent/CA2376973C/en not_active Expired - Lifetime
- 2000-06-14 JP JP2001512590A patent/JP3725823B2/en not_active Expired - Fee Related
- 2000-06-14 GB GB0128892A patent/GB2366662B/en not_active Expired - Fee Related
- 2000-06-14 MX MXPA01012583A patent/MXPA01012583A/en active IP Right Grant
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2001
- 2001-12-09 IL IL146993A patent/IL146993A/en not_active IP Right Cessation
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2002
- 2002-01-21 NO NO20020318A patent/NO328971B1/en not_active IP Right Cessation
- 2002-01-22 DK DK200200109A patent/DK200200109A/en not_active Application Discontinuation
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