HU225924B1 - Data cable comprising at least one insulated twisted pair cable and method for preparing the same - Google Patents

Description

The present invention relates to a data cable comprising at least one insulated pair of wires, and to a method for manufacturing it.

The present invention relates in particular to a high speed data cable which is particularly useful for transmitting data in the frequency range of 0.3-1200 MHz, in particular 1-600 MHz and / or 1-1000 MHz.

Currently, high-speed data cables usually have a heavy, rigid 50 μιτι aluminum strip for shielding with a 25 µm polyester (Mylar) layer on the back. The shielding is wrapped around each of the unshielded twisted-pair wires so that the thread pitch is less than the typically twisted-wire twist wires themselves. 10-15 cm pitch. The width of the shade is approximately 1.27 cm. The drive angle of the belt is very small, given the large twisted pair conductor - typically approx. 12.7 cm - its pitch, so that the longitudinal axis of the shielding strip is almost parallel to the longitudinal axis of the twisted pair wire. A typical cable has 4 pairs of twisted-pair wires, each surrounded by 40-65% tin copper. A thermoplastic sheath is extruded around the metal-coated wires to form the finished cable. Because of the small folding angle of the metal shielding tape, the shielding tape often opens during cable manufacturing, before being tied together with a bandage or a spiral body cable.

Another problem is that the shield tape often does not match the outline of the wires running under it. In this way, gaps are formed around the core of the unshielded twisted pair, which do not provide a sufficiently stable grounding surface in accordance with the requirements of an industrial standard for electrical properties, such as CENELEC pr EN 50288-4-1.

The aforementioned known cables have a non-compact structure in static state and therefore electrical properties are unstable under operating conditions, since a single fabric of the cable as a whole cannot adequately ensure that the sheathing tape does not open when the cable is bent. This spreading spreads further and reduces the impedance / RL ratio as the ground surface is disrupted. To add to this is the damping unevenness. Impedance values are also worse when bending the cable, because the distance between the centers of the wires and the position of the earthing surface change. The greater the bandwidth required, the greater the disadvantages mentioned.

At present, there is no known cable structure for high-speed UL 910 plenum data cables containing a non-fluorinated sheath. Beiden Wire & Cable Company has used and marketed for more than a year before the present invention a fluorescent jacket and a heat-resistant, anti-inflammatory barrier tape, such as Nomex®, a heat-resistant, anti-inflammatory barrier branded by DuPont. The Nomex® tape used in these cables prevented the dripping of the jacket and the formation of high peaks in the smoke value during the UL 910 fire test.

U.S. Patent No. 6,010,788 discloses a data cable in which each pair of wires is not twisted pair, i.e. the two wires of the pair of wires are not wound around one another. The parallel veins of each pair of wires are interconnected by an insulating layer that surrounds them, which provides an accurate fixation of the veins in the pair of wires. One or more pairs of parallel cores are wound around each other to form a double or multiple helix. The structure of the data cable according to the invention differs fundamentally from the above structure, in that the data cable according to the invention is twisted in itself, and the twisted pair of wires provided with insulation and bonding are joined together in parallel. In said data cable, unlike the data cable according to the invention, the wire pairs do not have side shielding, instead they use standard spiral shielding, and the overlap of the shielding tape does not reach at least 10% and the shielding tape is not tensioned. displace closed air. Due to the novel structure of the data cable according to the invention, the crosstalk between twisted pairs is significantly reduced. Through the combined effect of side shielding and bonding, the wires of twisted pairs are tightened to each other, which improves the electrical properties of twisted pairs, and reduces the impedance and damping of the data cable through multiple shielding.

The data cable disclosed in U.S. Patent No. 5,574,250 also includes an additional separation tape. The purpose of this separation strip is merely to improve the electrical properties of the twisted pair. However, in the data cable according to the invention, the separation strip between the non-fluorinated sheath and the side-shielded wire pairs, when used together with the sheath, significantly improves the smoke-free burning properties of the data cable.

In accordance with the present invention, each twisted pair of wires is wound with a side shield ribbon joined to a textile or metal binder in order to meet specifications for impedance / RL, damping uniformity, and capacitance imbalance.

The data cable of the present invention displaces much of the air normally contained therein from the inside of the twisted pair cable. This is achieved by wrapping a side shield around each pair of wires which is preferably overlapped by at least 10%, and which is 8-50 µm, preferably about 8 µm. Contains 25 µm thick metal. The side wrapped shield is secured to the wire with a suitable binder. The binder is preferably a fabric, a metal mesh or a spirally wound textile yarn. With this recording method, the value of the impedance is much more manageable, while providing good shielding. If necessary, a narrow folding can be used for shading

EN 225 924 Β1 along the lateral edge to improve EMI / Rfi insulation. Consistent grounding over the entire length of the cable allows for better capacitance imbalance and increases damping uniformity by reducing RL reflections and capacitance imbalance.

The data cable according to the invention has a significant geometric stability even when bent. Tight side shielding of at least 10% overlap, and the use of textile or metal binder can prevent the shield tape from slipping and thus bend the cable when bending the cable. This provides the data cable according to the invention with extremely stable physical and electrical properties, even under adverse conditions of use. In the twisted pair data cable according to the invention, the distance d between the centers of each wire as shown in Figure 3 and the distance between the wires and ground is much more stable than with known cables.

The data cables of the present invention are particularly suitable for use as Category 7 or higher power cables. This is especially true for cables that are shielded and bound and are used in the frequency range of at least 600 or 1000 MHz. A typical high speed data cable produced by the process of the present invention comprises four twisted pair wires, each consisting of two wires which are individually insulated with foamed or non-foamed material, preferably a fluoropolymer or a polyolefin. Each twisted pair of pairs has the same tight side metal shield tape, wherein the shield tape and its side folded edge are tightly secured with a tight binding material, such as a textile fabric, metal fabric, or spirally wound thread. Preferably the binder is 40-95% metal fabric. If a thread is used, it is advisable to coil it. The lateral wedge pairs are then wrapped around each other to form a bundle arrangement. The bundle pairs are stitched together with a total of 40-95% fabric or thread. Finally, a thermoplastic jacket of fluoropolymer, polyolefin or polyvinyl chloride material is extruded around the bundled twisted pair.

Metal shading is usually a strip made of aluminum or composite material. The sleeve tape may be, for example, a 'BELDFOIL' tape with a narrow fold, which is a shield in which a metal film or metal coating is provided on one side of a plastic support film. The metal-containing shielding tape may further be a 'DUOFOIL' sheath, which is a shielding in which a metal foil or metal coating is provided on both sides of the plastic support film. The screening tape may also be a 'BELDFOIL' tape with a free edge. The metal-containing tape is generally 8-50 µm, preferably approx. It contains 25 µm of aluminum. Although the metal used in the shielding tape is preferably aluminum, other suitable metals can be used for this purpose, such as copper, copper alloy, silver, nickel, and the like. Each twisted pair of wires is wrapped with said shielding tape so that the metal layer faces outwards. Although the shade tape is preferably wound with about 25% overlap, the degree of overlap can practically vary from 10% to 50%. Shielding with the best damping and impedance characteristics is achieved primarily with tapes that are short-circuited. However, with proper overlap, narrow folding can be omitted.

The number of shielded twisted pair pairs in a high speed data cable is usually 4-8, but more may be required. The side shield and binder are wound with such a tensile force that most of the air is displaced from the inside, thereby providing a defined standard impedance spread for each side shielded twisted pair, and a defined average standard impedance spread for the high speed data cable containing the side shielded twisted pair. The tension of the shield tape and the binder is such that the proportion of unfilled areas at any point along the length of the cable in the cross-sectional view of the twisted pair of side shields is only 25%, preferably not more than 18%.

The present invention provides a high speed twisted pair data cable in which a side shield is wrapped around an unshielded twisted pair, and simultaneously or thereafter, a textile or metal fabric or thread is wound around the side shield to secure the shield. Shading and dressing - e.g. fabric or thread is wound with a tensile force such that the unmatched impedance impedance of a twisted pair, otherwise usable as such, is limited to 3.5 for bundled, side-shielded twisted-pair pairs up to 600 MHz, where impedance spread of single vessels not exceeding 6; and for pairs up to 1000 MHz having a standard impedance spread of 4.5 or less, with a single wire having a maximum impedance of 6. Each wire having a multiple pair of side-shielded twisted pair wires with an average standard impedance of 600 MHz or more not more than 3.5 for all bundled shielded twisted pair pairs in the range 1-600 MHz with a standard impedance spread of 6 or less for each pair of twisted pair twisted pair twisted pair conductors with a minimum of 1000 MHz high speed data cable average paired standard impedance spread of up to 4.5 in the 1-1000 MHz range, with standard pairs of impedances of up to 6; standard impedance spread of 350 frequency measurements per 100 m cable 50-200 ohm average s impedance is calculated as the standard deviation.

The present invention also relates to a high speed data cable suitable for UL 910 high se3

EN 225 924 Β1 for use as a plenum data cable.

This cable preferably has a non-fluorinated sheath and a heat-resistant and anti-inflammatory shielding tape directly below the sheath.

The invention and its advantages will now be described in detail with reference to the drawing. In the drawing:

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

Figure 2 is a perspective view of a side shielded twisted pair wire used in the data cable of the present invention;

Fig. 3 is an enlarged cross-sectional view taken along line 3-3 of the wires of Fig. 2; 4A. FIG. 3A is an enlarged cross-sectional view of a twisted pair wire shielded twisted pair wire used in the data cable of the present invention;

4B. Fig. 3A is an enlarged cross-sectional view of a twisted pair wire-shielded twisted pair wire used in the data cable of the present invention;

FIG. FIG.

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

FIG. FIG. and Figure 8 is a perspective view of an embodiment of the UL 910 high speed plenum data cable according to the present invention.

Figure 1 shows a twisted pair of wires 10 having two wires 12, 13 wrapped around one another. The cores 12, 13 are preferably made of pure copper wire, but may be of any other material suitable for use in high speed data cable 20. The inserts 14 and 15 are extruded around both cores 12, 13, respectively, which may be a foamed or non-foamed fluoropolymer or a suitable polyolefin.

Fig. 2 shows a conductor 10A in which a metal-containing shield strip 16 is wound tightly around the twisted pair 10. The metal-containing shielding tape 16 may be a tape of any suitable material, such as a metal tape or a non-metal-based composite tape, such as polyester, namely MYLAR tape, containing metal widely used for shielding cables on one or both sides. The metal used for the metal strip and the composite strip may be, for example, aluminum, copper, copper alloy, nickel, silver, and the like. The total thickness of the metal layer is 8-50 µm, preferably 25 µm. If the material of the shield tape 16 is metal, the tape may be, for example, a narrow-fold BELDFOIL tape or a 'DUOFOIL' tape having a metal layer on both sides of the substrate.

As shown in Figure 3, the shielding tape 16 is wrapped around the twisted pair 10 so tightly that it does not squeeze the seals 14 and 15 while leaving only a small amount of void 17 between the cores 12, 13. The ratio of the unoccupied area 17 to the total cross-section of line 10A is less than 25% of line 10A shown in Figure 3. In the cross-section shown in Figure 3, the proportion of unoccupied area 17 is preferably less than 18%. The tightly wrapped shield tape fits into the outer shape of the conductor 10A. The twisted pair 10 and the surrounding shielding ribbon 16 thus together form a side shielded conductor 10A. The conveyor belt 16 is wound with a slight averaging and includes, if necessary, a narrow fold. As mentioned above, the thickness of the screening strip 16 made of aluminum or other metal is preferably 25 µm. The shade tape 16 is wide enough to be wound with at least 10% overlap.

As shown in FIG. 4B and 4B. 10A, the side-shielded twisted-pair conductor is tightly held together by a bonding material 18 and 18 ', thereby forming a bonded side-shielded conductor 10B and 10C. The shield tape 16 and the binder 18, 18 'are sufficiently tight to fit the contour of the unshielded twisted pair of pairs 10, thereby forming a conductor 10B, 10C having a substantially oval cross-section, yet not so tight as to deform the seal 14.15. The lateral shielding and tying are performed with a tension force that displaces much of the air from the inside of the tufted shielded conduits 10B, 10C. In this way, the conduit 10B, 10C has a narrow and oval cross-section containing unoccupied space at any point. As a result of the tight winding, the values of the standard impedance standard deviation and the average standard impedance standard deviation fall within the aforementioned range.

The insulation material 14, 15 is preferably a foamed fluoropolymer having a thickness of 0.254-1.524 mm, preferably 0.381-0.51 mm. Each of the veins 12, 13 typically has a value of 0.05-0.50 mm ² , preferably 0.20-033 mm ² .

The cores 12, 13 may be solid fibers or twisted fibers, preferably solid fibers. The thread pitch of the twisted pair 10 can be the same and different for the four conductors 10B, 10C, and the direction of twisting may be either right-handed or left-handed. The thread pitch is preferably 7.62-50.8 mm. The pitch of the conductors 10B, 10C is generally 10 to 20 times the average core diameter of the conductors 10B, 10C.

The bonding material 18 used for line 10B may be a textile fabric (e.g., Aramid) or a metal fabric, preferably 40-95% fabric. The metal fabric is preferably 45-65% tinned copper, but any other type of metal fabric suitable for use with a high speed data cable such as a Category 7 data cable may be used. The material of the metal fabric may thus include, but is not limited to, copper, copper alloy, bronze (i.e., alloying elements other than nickel and zinc), silver, and the like.

The binder 18 'used in the 10C conduit is a textile thread (e.g., Aramid thread) that is helically

EN 225 924 Β1 is wound and provides 40-95% binding.

The 18 'dressing is preferably 760 denier

Aramid thread, wound with a thread pitch of 6.35 mm, spirally wound.

As shown in Figure 5, a jacket 19 is extruded around the bound shielded conductors 10B. The wires 10B and the sheath 19 together form the high speed data cable 20 of the present invention. The material of the jacket 19 is any material suitable for Category 7 data cables, such as a thermoplastic material including, for example, flame retardant polyethylene, polyvinyl chloride, fluoropolymer and the like.

Fig. 6 shows a data cable 20 comprising four threaded shielded 10C wires. A grounding conductor 21 may be provided between the conductors 10C if necessary. The earth conductor 21 can of course be placed anywhere within the data cable 20 such as, for example, underneath the jacket 19 and / or externally to surround and join the four threaded shielded conductors 10C.

Figure 7 shows a data cable 25 having four fabric-bound shielded wires 10B. The bundle of four wires 10B is wound from the outside with a cord 22 made of metal or textile. The cord 22 is generally of the same type of material as the aforementioned binder 18. Between the 10C wires, 21 earth wires can be arranged as required. As mentioned in the previous example, the earth conductor 21 may be located at any location within the data cable 25 such as, for example, under the sheath 19 and / or around it! and assemble the four fabric-bonded shielded 10B wires.

Figure 8 shows a data cable 30 provided with a jacket 26 having, under its jacket 26, a separating strip 27 spirally wound around the wires 10B or folded sideways around them. The separation strip 27 surrounds each of the four conductors 10B and the cords 22 that hold them together. The sheath 26 is made of a non-fluorinated material such as polyvinyl chloride. Preferably, the release liner 27 is a heat resistant and anti-inflammatory tape such as Nomex®. The data cable 30 shown in Figure 8 is similar to the data cable 25 shown in Figure 7, except that the data cable 30 also includes a separation strip 27 and a non-fluorinated jacket 26. If necessary, such non-metallic fabric or thread shielded conductors 10B, 10C may also be wound around and bonded to the ground conductor 21. Subsequently, the separating strip 27 can be wrapped around the twisted pair wires and the jacket 26 is extruded around the resulting cable.

As shown in Figures 1-7 below. In the examples, high-speed, fabric-bound, twin-pair twisted-pair wires have an unmatched impedance with a standard impedance standard deviation of at least 3.5 for wires of 600 MHz or more when conducting at least 350 measurements in the 1-600 MHz range and at least 1000 MHz. up to 4.5 for bandwidth wires if at least 350 measurements are made in the 1-1000 MHz range. The average standard impedance spread of high-speed data cables 20, 25, including twisted pair twisted pair wires, is a woven band of fabric wound for all 10 twisted pair wires up to 3.5 in the range 1-600 MHz and up to 4.5 in the range 1-1000 MHz the standard impedance standard deviation is at most 6.0.

All of the tests presented below were impedance tests according to CENELEC and are shown in Figure 4A. 10A and 10B are performed on the bonded side shielded conductors 10B. The 10B wires were 100 m long. BELDFOIL tape containing 25.4 μηπ aluminum was used as a side shield. The screening tape 16 is wound slightly overlapped. The screening strip 16 was secured with a metal web. Measurements were started at 0.3 MHz and at least 350 measurements were made in the 1-600 MHz range for Examples 1 and 8, and in the 1-1000 MHz range in Examples 2-7. examples. The cores 12 and 13 consisted of pure copper with a cross-section of 0.33 mm ² and FEP 14, 15 insulation. Measurements were made at various temperatures but the results were referenced to 20 ° C. For all 10B wires, the proportion of unoccupied area 17 in the cross-sectional view of the 10B wire was less than 18%, and the average impedance in the tests was about. It was 100 ohms.

Example 1

First, a 100 m long fabric-bonded shielded 10B wire was tested at 23.3 ° C. The impedance of line 10B was measured in the 0.3 to 600 MHz range and at least 350 measurements were made in the 1-600 MHz range. The standard impedance standard deviation of line 10B was 1.7714 with an average impedance of 95.2619.

Example 2

A shielded 10B wire bound to a 100 m long web was tested at 23.3 ° C. The impedance of line 10B was measured in the range 0.3 to 1000 MHz and at least 350 measurements were made in the range 1 to 1000 MHz. The standard impedance standard deviation of line 10B was 2.8565 with an average impedance of 94.3178.

Example 3

A 100 m high speed 20 data cable was tested at 23.9 ° C and consisted of four fabric-bonded shielded 10B wires. The impedance of each of the four 10B wires was measured in the range 0.3 to 1000 MHz. At least 350 measurements were made in the 1-1000 MHz range. The measured values were referenced to 20 ° C.

The standard impedance spread of the first 10B wire was 4.2744 with an average impedance of 100.5321.

The standard impedance spread of the second 10B wire was 5.1630 with an average impedance of 101.4416.

The standard impedance standard deviation of the third conductor 10B was 4.0469 with an average impedance of 101.4583.

HU 225 924 Β1

The standard impedance spread of the fourth 10B wire was 4.3360 with an average impedance of 100.7506.

The average standard impedance standard deviation of the high speed 20 data cable in this test was (4.2744 + 5.1630 + 4.0469 + 4.3360) / 4 = 4.4551.

Example 4

A 100 m high speed 20 data cable was tested at 23.9 ° C and consisted of four fabric-bonded shielded 10B wires. The impedance of each of the four 10B wires was measured in the range 0.3 to 1000 MHz. At least 350 measurements were made in the 1-1000 MHz range. The measured values were referenced to 20 ° C.

The standard impedance spread of the first 10B wire was 4.0430 with an average impedance of 101.1783.

The standard impedance spread of the second 10B wire was 4.0027 with an average impedance of 101.3086.

The standard impedance spread of the third 10B wire was 3.6038 with an average impedance of 101.7716.

The standard impedance spread of the fourth 10B wire was 4.0092 with an average impedance of 101.3598.

The mean standard impedance standard deviation of the high speed 20 data cable for this test was (4.0430 + 4.0027 + 3.6038 + 4.0092) / 4 = 3.9147.

Example 5

A 100 m high speed 20 data cable was tested at 23.9 ° C and consisted of four fabric-bonded shielded 10B wires. The impedance of each of the four 10B wires was measured in the range 0.3 to 1000 MHz. At least 350 measurements were made in the 1-1000 MHz range. The measured values were referenced to 20 ° C.

The standard impedance spread of the first 10B wire was 3.2469 with an average impedance of 199.2035.

The standard impedance spread of the second 10B wire was 4.2070 with an average impedance of 100,9596.

The standard impedance spread of the third 10B wire was 3.4690 with an average impedance of 102.8214.

The fourth impedance 10B had a standard impedance spread of 3.8990 with an average impedance of 101.2338.

The mean standard impedance standard deviation of the high speed 20 data cable in this test was (3.2469 + 4.2070 + 3.4690 + 3.8990) / 4 = 3.7055.

Example 6

A 100 m high speed 20 data cable was tested at 24.2 ° C and consisted of four fabric-bonded shielded 10B wires. The impedance of each of the four 10B wires was measured in the range 0.3 to 1000 MHz. At least 350 measurements were made in the 1-1000 MHz range. The measured values were referenced to 20 ° C.

The standard impedance standard deviation of the first 10B wire was 4.0488 with an average impedance of 101.4423.

The standard impedance spread of the second 10B wire was 4.2081 with an average impedance of 100.9498.

The standard impedance standard deviation of the third conductor 10B was 4.5567 with an average impedance of 102.0121.

The standard impedance spread of the fourth 10B wire was 3.6408 with an average impedance of 102.9531.

The mean standard impedance standard deviation of the high speed 20 data cable for this test was (4.0488 + 4.2081 + 4.5567 + 3.6408) / 4 = 4.1136.

Example 7

A 100 m high speed 20 data cable was tested at 24.2 ° C and consisted of four fabric-bonded shielded 10B wires. The impedance of each of the four 10B wires was measured in the range 0.3 to 1000 MHz. At least 350 measurements were made in the 1-1000 MHz range. The measured values were referenced to 20 ° C.

The standard impedance spread of the first 10B wire was 3.6939 with an average impedance of 102.0776.

The standard impedance spread of the second 10B wire was 3.8658 with an average impedance of 100.4614.

The third impedance 10B had a standard impedance spread of 3.5208 with an average impedance of 99.7808.

The standard impedance spread of the fourth 10B wire was 3.9835 with an average impedance of 100.0594.

The average standard impedance standard deviation of the high speed 20 data cable in this test was (3.6939 + 3.8658 + 3.5208 + 3.9835) / 4 = 3.7660.

Example 8

A 100 m high speed 20 data cable was tested at 24.4 ° C and consisted of four fabric-bonded shielded 10B wires. The impedance of each of the four 10B wires was measured in the range 0.3 to 600 MHz. At least 350 measurements were made in the 1-600 MHz range. The measured values were referenced to 20 ° C.

The standard impedance spread of the first 10B wire was 3.5621 with an average impedance of 102.2971.

The standard impedance standard deviation of the second 10B wire was 3.9185 with an average impedance of 103.9484.

The standard impedance spread of the third 10B wire was 2.6943 with an average impedance of 103.2519.

The fourth impedance 10B had a standard impedance spread of 2.5206 with an average impedance of 102.9625.

The average standard impedance standard deviation of the high speed 20 data cable for this test was (3.5621 + 3.9185 + 2.6943 + 2.5206) / 4 = 3.1739.

Example 9

Two data cables 30, shown in Figure 8, were subjected to UL 910 tests. For each data cable 30, a shielding tape 16 was used, which contained an aluminum layer of 50.8 µm and a polyester layer of 12.7 µm. The width of the screening strip 16 was 15.88 mm. Each conductor 10B was wrapped with Aramid 760 thread on the outside of the screening strip 16. The four 10B wires were wrapped with 22% 40 tin-plated copper cord. The four 10B wires bound together with 22 cords were coated with a 50.8 µm Nomex 27 strip having a width of 31.75 mm. Polyvinyl chloride-26 sheaths were extruded around the separating strip 27.

HU 225 924 Β1

Both of the 30 data cables passed the UL 910 plenum test. During the test, the first 30 data cables recorded a 45.72 cm flame, a peak 0.32, and an average P / F of 0.09, while the second 30 data cable recorded a 45.72 cm flame, a 0.29 peak and 0 , 09 mean P / F value. Each of the 30 data cables is suitable for use as a Category 7 cable in the 1000 MHz range.

Although the UL 910 high speed data cable of Category 5 or higher according to the present invention has been tested with the Category 7 cable shown in Figure 8, it is understood that the invention is not limited to such data cables 30, and any Category 5 or higher cable that forms a non-fluorinated sheath, such as polyvinyl chloride, and is heat-resistant, anti-inflammatory, between the sheath and the core. There are 27 dividers. Thus, for example, the UL 910 plenum high speed data cable having a bandwidth of at least 600 MHz, the structure of which is described in another parallel application, and which is helically wound with twisted-pair wires with shielding tape, is also part of the invention; non-fluorinated, for example, polyvinyl chloride 26 sheaths; it contains something between the jacket and the cable core, a heat-resistant, anti-inflammatory strip. The high-speed UL 910 full-size data cable of category 5 according to the invention is not limited to the above-mentioned 30 data cables, i.e., all high-speed UL 910 full-size data cables of category 5 with non-fluorinated sheath 26 and a heat-resistant, anti-inflammatory separation strip 27 is provided between the sheath 26 and the cable core.

It is to be understood that the embodiments disclosed herein are for purposes of illustration only, and that the invention is not limited to these particular embodiments. It will be apparent to those skilled in the art that the invention may be modified within the scope of the claims.

Claims (10)

PATENT CLAIMS A data cable (20) comprising at least one twisted pair of wires (10) wrapped around a twisted pair of wires (10) with a shielding tape (16) and a data cable (20) made of a fabric or metal bandage (18,18 '). ) comprising twisted pair-wound twisted pair conductors (10B, 10C) wrapped around the shielding strip (16), characterized in that the shielding strip (16) has an overlap rate of at least 10%, and the shielding strip (16) and the bonding material (18, 18 ') is wrapped around the twisted pair (10) with a tensile force such that a substantial portion of the air is displaced from the interior of the resulting shielded twisted pair (10B, 10C) and the twisted pair shielded twisted pair wire (10B, 10C) has a cross-sectional area (17) of less than 25% and a standard 20 ° C data cable (20) impedance standard deviation up to 4.5, where the standard impedance standard deviation is calculated as the standard impedance between 50 ohms and 200 ohms. Data cable according to Claim 1, characterized in that the ratio of the unoccupied area (17) in the cross-section of the twisted pair twisted pair conductors (10B, 10C) is less than 18%. The data cable according to claim 1 or 2, characterized in that it further comprises at least three twisted pair of wires (10) which are in the same manner as the first twisted pair of wires (10) and the shielding tape (16). ') wrapped around; further comprising a jacket (19) that surrounds the at least four interlocked, side-shielded twisted pair wires (10B, 10C) forming a high speed data cable (20); an average standard impedance standard deviation of no greater than 4.5 over a section of at least 100 m of high speed data cable (20); wherein the mean standard impedance scatter is the mean of the standard impedance scatterings on each of the at least four bonded side shielded twisted pair wires (10B, 10C) and the standard impedance scatter on each of the at least four twisted pair shielded twisted pair wires (10B, 10C) The standard deviation is calculated from 350 frequency measurements and is calculated as the standard deviation between 50 ohms and 200 ohms impedance. Data cable according to Claim 2 or 3, characterized in that the at least four bound shielded twisted pair conductors (10B, 10C) have a heat-resistant, anti-inflammatory release tape (27) which is a sheath (26) and a located between four bonded side-shielded twisted-pair conductors (10B, 10C) and the jacket (26) is made of a non-fluorinated polyolefin. 5. A data cable according to any one of claims 1 to 5, characterized in that the data cable (20) has a bandwidth of at least 1000 MHz; and standard impedance filtering is based on a total frequency measurement of at least 350 wires (10B, 10C) on all bonded side-shielded twisted-pair wires, averaged over an impedance of 90 ohms to 110 ohms, with each wire (10B) , 10C) standard impedance standard deviation of the mean impedance of not more than 6. 6. A data cable according to any one of claims 1 to 5, characterized in that the data cable (20) has a bandwidth of at least 600 MHz; EN 225 924 ancia1 has an average standard impedance spread of less than or equal to 3.5 at 20 ° C over a section of high speed data cable (20) of at least 100 m; and the standard impedance spreading is calculated from the average frequency impedance of 90 ohms to 110 ohms on all wires (10B, 10C) based on at least 350 frequency measurements in the 1-600 MHz range, where the standard impedance spreading of each wire (10B, 10C) is average impedance of not more than 6. 7. Procedure 1-6. An insulated data cable according to any one of claims 1 to 6, characterized in that a twisted pair of wires (10) is wrapped around a metal shield tape (16) at least 10% overlapped, wherein the side metal shield tape (16) and the bandage (18, 18 ') wrap around the twisted pair (10) so that the standard impedance standard deviation of the resulting twisted pair shielded twisted pair conductor (10B, 10C) at 20 ° C is at most 4.5, where the standard impedance standard deviation of the conductor (10B, 10C) is Frequency measurement of at least 350 sections over a length of 100 m or more and calculated as the standard impedance of the ohms between 50 ohms and 200 ohms. Method according to claim 7, characterized in that the shielding and bonding of the twisted pair of wires (10) is carried out in such a way that the ratio of unfilled areas (17) in the cross-section of the bound side-shielded wires (10B, 10C) is less than 18%. and the wires (10B, 10C) have a bandwidth of at least 600 MHz; performing at least 350 frequency measurements in the range 1-600 MHz; and standard impedance spreading of up to 3.5 It is calculated as an average impedance standard deviation between 90 ohms and 110 ohms, where the average impedance standard deviation of any wire (10B, 10C) is at most 6. Method according to Claim 7, characterized in that the shielding and bonding of the twisted pair of wires (10) is carried out in such a way that the proportion of unfilled areas (17) in the cross-section of the bound side-shielded wires (10B, 10C) is less than 18%. and the wires (10B, 10C) have a bandwidth of at least 1000 MHz; performing at least 350 frequency measurements in the range from 1 to 1000 MHz; and a standard impedance standard deviation of up to 4.5 It is calculated as an average impedance standard deviation between 90 ohms and 110 ohms, where the average impedance standard deviation of any wire (10B, 10C) is at most 6. 10. A method according to any one of claims 1 to 5, characterized in that, before extruding the jacket (26), a heat-resistant, anti-inflammatory release strip (27) is wound around the at least four bound twisted-pair twisted pair conductors (10B, 10C). between the sheath (26) and the at least four twisted pair wires (10B, 10C) of twisted side shields.