Cable with parallel conductors

Abstract

The invention relates to a cable. An exemplary embodiment of the cable (1) includes a first core (10a), a second core (10b), a first film (20), a second film (30), a wire mesh shield (40), and a sheath (50). The first core (10a) comprises a first electrical conductor (12a) and a first insulator (14a) surrounding the first electrical conductor (12a). The second core material (10b) comprises a second electrical conductor (12b) and a second insulator (14b) surrounding the second electrical conductor (12b). The first core material (10a) and the second core material (10b) extend parallel to each other. The first film (20) surrounds the first core material (10a) and the second core material (10b). The second film (30) is applied to the first film (20). The wire mesh shield (40) is applied to the second film (30). The sheath (50) circumferentially surrounds the wire mesh shield (40).

Description

Technical Field

[0001] This invention relates to a cable. In particular, this invention relates to a cable that can be used in the automotive field, such as a data cable. Background Technology

[0002] Cables are used in many fields. Charging cables or data cables can be cited as examples of cables. Cables used for data transmission (referred to as data cables) are used in a wide variety of technical applications. Data cables are the medium for transmitting signals; that is, data is usually transmitted using signals as data signals. Transmission can, in principle, be carried out on an electrical foundation (electrical data cable), an optical foundation (optical data cable), or a combination of both (often called hybrid cables, and sometimes composite cables).

[0003] Electrical data cables used in the automotive industry typically have two cores, each consisting of a conductor made of copper or an alloy, covered with a cylindrical plastic sheet suitable for high frequencies. In conventional methods, these two cores are twisted together. This serves two purposes: firstly, to firmly press the cores together, as the spacing between the two conductors plays a crucial role in many high-frequency characteristics; and secondly, the twisting ensures force and elongation compensation under mechanical loads such as cable bending. Such cables with twisted cores typically have a cylindrical shape. In the automotive industry, many cables are often arranged in harnesses within vehicles.

[0004] In addition, data cables are used in data center applications, such as computing centers or server farms. These data cables typically have two cores with copper conductors, which are covered by a cylindrical sheath made of a suitable plastic. These data cables also typically have a cylindrical shape.

[0005] Document DE 11 2020 000 425 T5 discloses a shielded communication cable comprising parallel cable lines, each comprising a pair of insulated conductors arranged parallel to each other without twisting. The shielded communication cable comprises parallel cable lines comprising a pair of insulated conductors arranged parallel to each other. Each insulated conductor comprises a conductor and an insulating coating covering the conductor. A braided shield comprising an interlaced basic mesh and a foil shield comprising metal foil are arranged on the outer circumference of the parallel cable lines.

[0006] Regardless of the exact configuration, cables are typically exposed to strong mechanical loads, such as due to bending or torsion. Mechanical loads can impair cable performance, such as electrical or high-frequency performance, and may even cause the cable to break or break.

[0007] An improved cable is needed, particularly one that is more flexible and / or more durable. Summary of the Invention

[0008] According to a first aspect of the invention, a cable is provided. The cable has a first core, a second core, a first membrane, a second membrane, a wire mesh shield (Drahtschirm), and a sheath. The first core has a first electrical conductor and a first insulator surrounding the first electrical conductor. The second core has a second electrical conductor and a second insulator surrounding the second electrical conductor. The first and second cores extend parallel to each other. The first membrane circumferentially surrounds the first and second cores. The second membrane is applied to the first membrane. The wire mesh shield is applied to the second membrane. The sheath surrounds the wire mesh shield.

[0009] The first core material and the second core material may each have a separate insulator. In other words, the first insulator (first cable insulator) and the second insulator (second cable insulator) may be formed separately from each other or may be formed as separate insulators. Alternatively, the first insulator and the second insulator may be formed from a common insulator. In other words, the first electrical conductor and the second electrical conductor may be surrounded / covered by a common insulator that serves as both the first and second insulators.

[0010] Regardless of the exact configuration of the first and second insulators, the first and second core materials can be formed as a core pair or be configured as such. The first and second core materials can extend parallel to each other in the longitudinal direction of the cable. The first and second core materials can extend parallel to each other along their entire length and / or along the entire length of the cable. Due to the parallel arrangement of the first and second core materials, (very) high torsional stability is achieved. In technical language, having two core pairs extending parallel to each other in the longitudinal direction of the cable is also commonly described as a parallel pair or referred to as a parallel pair. The length of the first membrane and / or the second membrane and / or the wire mesh shield and / or the sheath can at least substantially correspond to the length of the first core material and / or the second core material and / or the cable. The core pairs used for data transmission can be formed regardless of the specific configuration.

[0011] The wire mesh shielding component may be a woven shielding component, a shielding braided component, or a spiral shielding component. The wire mesh shielding component may be formed as a woven shielding component, a shielding braided component, or a spiral shielding component.

[0012] The first electrical conductor can be formed as a single-wire conductor or a stranded conductor. For example, the first electrical conductor can be formed as a single-wire copper conductor. Such a conductor has very good high-frequency characteristics, especially in terms of attenuation behavior. Alternatively, the first electrical conductor can be formed as a stranded copper conductor, a single-wire alloy conductor, a single-wire copper-clad steel (CCS) conductor, a stranded conductor made of CCS, or a stranded conductor made of an alloy. These conductors are more flexible than the conductors with single-wire copper conductors described above. Alternatively, the first electrical conductor can be formed as a stranded conductor made of CCS or a stranded conductor made of an alloy. Depending on the alloy and / or the strand used, such a conductor can be even more flexible. Depending on the configuration and / or alloy used, even a single-wire CCS conductor or a single-wire alloy conductor can be very flexible. The CCS conductor consists of a steel core covered with a thin layer of copper.

[0013] The second electrical conductor can be formed as a single-wire conductor or a stranded conductor. For example, the second electrical conductor can be formed as a single-wire copper conductor. This conductor exhibits very good high-frequency characteristics, particularly in terms of attenuation behavior. Alternatively, the second electrical conductor can be formed as a stranded copper conductor, a single-wire alloy conductor, a single-wire CCS conductor, a stranded conductor made of CCS, or a stranded conductor made of an alloy. These conductors are more flexible than the conductors with single-wire copper conductors described above. Alternatively, the second electrical conductor can be formed as a stranded conductor made of CCS or a stranded conductor made of an alloy. Depending on the alloy and / or the strand used, such a conductor can be even more flexible. Depending on the configuration and / or alloy used, even a single-wire CCS conductor or a single-wire alloy conductor can be very flexible.

[0014] The first insulator and / or the second insulator may be arranged / formed into a cylindrical shape around the first electrical conductor and / or the second electrical conductor. In other words, each of the two electrical conductors may be provided with a cylindrical insulating layer. The insulating layer may be a plastic or formed of plastic as a dielectric. The plastic used may be selected based on / according to its high-frequency characteristics. For example, polyethylene (PE), polypropylene (PP), or fluorinated ethylene propylene (FEP) may be used in a solid structure or in a multilayer structure combining solid layers and foamed layers. Solid or foamed insulation materials may be selected according to the corresponding mechanical requirements of the finished cable. To the extent technically possible, the two core materials may be manufactured to be at least substantially identical in their properties and / or dimensions.

[0015] The first membrane can circumferentially surround the first core material and the second core material. Therefore, even if the cable is subjected to mechanical loads or stresses, such as bending or torsion, the first membrane can hold the first core material and the second core material in place.

[0016] The first membrane may have a metal layer, particularly an aluminum layer. Therefore, the first membrane can be formed as a metal-coated membrane, particularly an aluminum-coated membrane. Viewed radially from the cable, the metal layer may be disposed on the inner side of the first membrane.

[0017] The first film may have another metal layer. The other metal layer may be formed on the outside of the first film. In this case, the first film may be formed as a film coated with metal on both sides.

[0018] The first membrane may be in at least partial direct contact with the first insulator. The first membrane may be in at least partial direct contact with the second insulator.

[0019] As described above, the two core materials extend parallel to each other. To apply the first film, the two core materials can be guided parallel to each other into a bandiermaschine without any twisting. In the bandiermaschine, a metal-coated film can be applied as the first film. The first film can also be described as an inner film because it is the innermost film located in the radial view of the cable structure. As described above, the first film can be formed as a film coated on one side. In the case of a one-side coated film, the metal side can be oriented inward toward the core material. In this case, the metal side of the first film is separated from the wire mesh shield by at least a second film. Alternatively, the first film can be formed as a coated film on both sides, in which case one metal layer is located on the inner side in a radial view and one metal layer is located on the outer side.

[0020] The first membrane can be applied along a first laying direction. The width and pitch of the first membrane can be selected accordingly. The first laying direction can be a so-called "S" laying direction or a "Z" laying direction.

[0021] The second film can be formed without a metal layer. For example, the second film can be composed of plastic, particularly polyethylene terephthalate (PET) or polypropylene (PP). The second film can be applied to a strapping machine like the first film. The second film can be formed as a non-metallic coated film. If the first film has a metallic coated film, the second film can be arranged as an insulating layer between the first film and the wire mesh shield.

[0022] The second membrane may be in direct contact with the first membrane, at least partially. Specifically, the second membrane may be applied directly to the first membrane after the first membrane has been applied.

[0023] The second membrane can be applied along a second layup direction. The second layup direction may differ from the first layup direction. The second layup direction may extend in the opposite direction to the first layup direction. Because the membranes have opposite layup directions (reversely bundled membranes), the core material remains largely continuous (always) fixed.

[0024] The second membrane can be bundled in a second laying direction opposite to the first laying direction. For example, if the first membrane is to be applied in a "Z" laying direction, the second membrane can be bundled in an "S" laying direction. The second membrane has at least 20% overlap. In other words, individual, at least partially overlapping turns or windings of the second membrane can overlap each other by at least 20%. Thus, even in cases where bending is possible, a closed insulating layer can be formed against the metal-coated first membrane.

[0025] The second membrane may have one or more carbon-containing elements or materials. This can increase shielding attenuation.

[0026] As described above, a wire mesh shield, such as a braided shield, can be applied to the first and second membranes. The wire mesh shield may also optionally be formed into a spiral shield. A sheath can be extruded onto a wire mesh shield, such as a braided shield. The wire mesh shield can be applied directly to or disposed on the second membrane.

[0027] The sheath can be applied directly to or disposed on the wire mesh shield. Alternatively, a separator or spacer can be provided between the wire mesh shield and the sheath. In other words, the cable can have a separator or spacer that can be provided between the wire mesh shield and the sheath. Therefore, a separator or spacer can be used between the wire mesh shield (e.g., a braided shield) and the sheath as needed. The separator can be formed, for example, a film, or comprise a film. For example, the spacer can be in powder form, for example.

[0028] The sheath may have a wall thickness that is at least substantially uniform or constant along its entire circumference. In other words, the sheath may be formed or created with a uniform wall thickness over the entire circumference.

[0029] The sheath may have an elliptical cross-section. Therefore, the resulting cable may have an elliptical and / or flat and / or oval cross-section, rather than a circular cross-section. The cable has an aspect ratio of at least 1:2.

[0030] The first electrical conductor may have an outer diameter ranging from 0.30 mm to 0.62 mm. The second electrical conductor may have an outer diameter ranging from 0.30 mm to 0.62 mm. The first core material may have an outer diameter ranging from 0.78 mm to 1.60 mm. The second core material may have an outer diameter ranging from 0.78 mm to 1.60 mm. The sheath may have internal dimensions ranging from 1.50 mm × 2.50 mm to 2.5 mm × 4.3 mm in height and width. Attached Figure Description

[0031] The invention will be further explained based on the accompanying drawings. The drawings schematically show:

[0032] Figure 1 These are possible configurations of the cable according to exemplary embodiments. Detailed Implementation

[0033] Specific details are set forth below to provide a complete understanding of the invention, without limitation. However, it will be apparent to those skilled in the art that the invention can be used in various other exemplary embodiments that may differ from the details set forth below. For example, specific configurations and arrangements of cables are described below, but should not be considered limiting. Furthermore, various application areas for cables are conceivable. Examples given here are only those in offices, public facilities, or various vehicles and transport vehicles. Specific exemplary applications of cables described in more detail below are in the vehicle (also commonly referred to as automotive) industry. In this field, it is common practice for data cables to extend from a central control unit to connectors arranged on or within the vehicle.

[0034] Automotive data cables are typically cut to length after production, supplied with plugs, and then inserted into a harness on the assembly panel (a flat structure), where they are bundled together with adjacent cables extending at the same point. The harness is formed in this manner. During vehicle assembly, the harness is inserted into the body shell, where it unfolds and is pushed through openings. At its ends, the initially produced flat harness has a complex three-dimensional nested structure. Therefore, the harness is exposed to the effects of bending and torsional stresses.

[0035] In the prior art, automotive data cables are formed from twisted (twisted) cores, or stranded pairs. In this case, such cables in the prior art are circular in shape. With this standard construction in the prior art, the twisting applied to the cable at random frequencies and directions during production and assembly can cause the two cores of the data pair to move and separate, thus compromising high-frequency characteristics.

[0036] Figure 1A cross-section of a cable 1 according to an exemplary embodiment is schematically shown. The cable 1 has a first core 10a, a second core 10b, a first membrane 20, a second membrane 30, a wire mesh shield 40, and a sheath 50. The first core 10a has a first electrical conductor 12a and a first insulator 14a surrounding the first electrical conductor 12a. The second core 10b has a second electrical conductor 12b and a second insulator 14b surrounding the second electrical conductor 12b. The first core 10a and the second core 10b extend parallel to each other. The first membrane 20 circumferentially surrounds the first core 10a and the second core 10b. As an example, the second membrane 30 is applied directly to the first membrane 20. As an example, the wire mesh shield 40 is applied directly to the second membrane 30. The sheath 50 circumferentially surrounds the wire mesh shield 40 and is therefore in direct contact with the wire mesh shield.

[0037] about Figure 1 The wire mesh shield 40 is described as a braided shield by way of example, and is therefore also described as a braided shield 40 by way of example. As an alternative to the braided shield, the wire mesh shield 40 may also be formed as a shielding braid or a spiral shield.

[0038] The first core 10a and the second core 10b may form a core pair or be constructed as a core pair. Such core pairs are also typically described as parallel pairs. The first core 10a and the second core 10b may extend parallel to each other in the longitudinal direction of the cable 1. The first core 10a and the second core 10b may extend parallel to each other along their entire length and / or along the entire length of the cable 1.

[0039] The lengths of the first membrane 20 and / or the second membrane 30 and / or the wire mesh shield 40 and / or the sheath 50 may at least substantially correspond to the lengths of the first core 10a and / or the first core 10b and / or the cable 1.

[0040] The first core 10a and the second core 10b can each be formed as a single core. Two single cores 10a and 10b can form a core pair. Alternatively, the core pair can be formed from two cores 10a and 10b placed parallel to each other, each having a common cover / insulator 14a and 14b of electrical conductors 12a and 12b and insulating material, wherein the insulators 14a and 14b are connected to each other integrally and can be applied to the core pair / conductor pair, for example, by co-extrusion. The first insulator 14a and the second insulator 14b must not be separate insulators, but can be formed from a common insulator. In this case, the common insulator can be integral. The common cover of the two electrical conductors 12a and 12b can be achieved through a mesh connection of the insulators 14a and 14b. Alternatively, the common cover can be formed from two overlapping circles (cross-sections). In this way, due to the construction of two overlapping circles, a (minimum) greater distance to the shield is achieved, which has a positive effect on attenuation (similar to the intermediate sheath).

[0041] like Figure 1 As shown, a core material pair, such as a data pair, has exactly two core materials, 10a and 10b. In other words, in Figure 1 In the configuration, according to its name, the core material pair consists of two core materials 10a and 10b.

[0042] Depending on the application environment or area of ​​use, various materials can be used for electrical conductors 12a and 12b. In the automotive environment, there are three flexibility grades: "Standard," "Flexible," and "Highly Flexible." These grade names are followed by a collection of various requirements regarding mechanical stress durability. For example, a single-conductor round copper wire can be used for the "Standard" flexibility grade. This conductor exhibits significant high-frequency characteristics, particularly in cases of attenuation behavior. For the "Flexible" flexibility grade, stranded copper conductors, single-conductor alloy conductors, single-conductor CCS conductors, and CCS stranded conductors or alloy stranded conductors can also be used. For the "Highly Flexible" flexibility grade, single-conductor CCS or alloy conductors can also be used. CCS stranded conductors or alloy stranded conductors may even be more suitable.

[0043] By way of example only, it should be noted that the first electrical conductor 12a and / or the second electrical conductor 12b may be formed of copper or an alloy. As an alloy, for example, a copper-silver alloy, a copper-magnesium alloy, or a copper-tin alloy may be used.

[0044] The first conductor 12a and / or the second conductor 12b may have a diameter of 0.057 mm. 2 Up to 0.22mm 2The cross-section within the range of [specified range]. The first conductor 12a and / or the second conductor 12b may be formed as a single-wire conductor or a multi-wire conductor, such as a seven-wire conductor. The conductor diameters of the first conductor 12a and / or the second conductor 12b may each be in the range of 0.30 mm to 0.62 mm.

[0045] As an example, the first conductor 12a and the second conductor 12b of cable 1 each have... Figure 1 Both are provided with insulators 14a and 14b, which, as an example, are formed as plastic cylindrical insulating layers. The plastic used can be selected based on its high-frequency characteristics. For example, PE, PP, or FEP can be used for solid structures or multi-layer structures with a combination of solid and foamed layers. For example, the choice between solid and foamed insulation materials can be precisely made based on the mechanical requirements of the finished cable 1. Figure 1 The two core materials 10a and 10b are manufactured with at least substantially the same performance and dimensions within the limits of technical possibility. The core diameter of the first core material 10a and / or the second core material 10b may range from 0.78 mm to 1.60 mm.

[0046] Two core materials 10a and 10b are guided into the strapping machine in parallel without any twisting. In the strapping machine, an inner metal-coated film is applied as a first film 20. When a one-sided coated film is used as the first film 20, the metal side is guided inward, i.e., oriented towards the core materials 10a and 10b. For example, a portion of the inner side of the first film 20 directly contacts the outer side of the first core material 10a, more specifically, the first insulator 14a. Furthermore, a portion of the inner side of the first film 20 directly contacts the outer side of the second core material 10b, more specifically, the second insulator 14b. As an alternative to a one-sided coated metal film, a film coated on both sides (the inner and outer sides of the film 20) can be used as the first film 20.

[0047] The first membrane 20 is applied along a first laying direction. More precisely, the first membrane 20 is applied around the two core materials 10a and 10b along the first laying direction.

[0048] The laying direction typically describes the orientation of one element wrapped around another. Therefore, in this case, the laying direction can be understood as the direction in which the first membrane 2 is bundled or wrapped around the core pair formed by the first core 10a and the second core 10b. The product feed per full turn parallel to the longitudinal axis of the cable 1 can be considered as the (membrane) pitch.

[0049] The width and pitch of the membrane can be selected according to the required cable characteristics and / or cable construction. The first lay-up direction can be "S" or "Z". The lay-up direction is generally indicated by the capital letter "S" for left-hand twist and by the capital letter "Z" for right-hand twist. The names here are derived from the similarity to the turns of the letters S and Z. In an S lay-up, the turn of the first membrane 20 extends from the upper left to the lower right of the core pair, as indicated by the letter S. In a Z lay-up, the turn extends from the upper right to the lower left of the core pair, as indicated by the letter Z. Therefore, instead of an S lay-up, it can also be described as left-hand twist. Therefore, instead of a Z lay-up, it can also be described as right-hand twist. The helical direction is specified according to the turn direction (helix). When the helix is ​​wound counterclockwise around the core pair (viewed from the direction it moves away from the observer), the helix is ​​left-hand twist (S lay-up), and when the helix is ​​wound clockwise around the core pair (viewed from the angle from the observer), it is right-hand twist (Z lay-up).

[0050] The second non-metallic coated film 30 is then applied to the first film 20. The second film 30 is bundled in a second laying direction opposite to the first laying direction. If the first film 20 is to be applied in a "Z-lay" manner, the second film 30 is bundled onto the first film 20 in an "S-lay" manner. The second film 30 has at least 20% overlap. In other words, viewed from the width or transverse direction of the second film 30, one turn of the second film 30 overlaps with the next turn of the second film 30 by at least 20%. This method is used to produce or manufacture the closed insulating layer against the metallic coated first film 20, even in cases where bending is possible. The insulating layer formed by the second film 30 insulates the wire braid 40 from the first metallic coated film 20, and vice versa.

[0051] Here, the first membrane 20 and / or the second membrane 30 can be formed in the form of a particularly flat strip or membrane. The second membrane 30, formed in the form of a strip or membrane, can be wound here in a layup manner opposite to that of the first membrane 20, which is formed in the form of a strip or membrane. By reverse layup, it is understood that the layup directions of the first membrane 20 and the second membrane 30 do not match, but extend in opposite directions. The strip or membrane of the second membrane 30 can be wound around the strip or membrane of the first membrane 20 such that the strip or membrane extends along the strip / membrane extension direction and has a width extending orthogonally to that strip / membrane extension direction. Adjacent turns of the strip or membrane can overlap in the width direction. Each winding of the second membrane 30 can each have at least 20% overlap area.

[0052] The second membrane 30 may have insulating effects / properties. The second membrane 30 may be provided with one or more carbon-containing materials such as, for example, carbon black, and thus colored / dyed black. Therefore, the second membrane 30 will not be a conductor, but the carbon can dissipate high-frequency (HF) energy and increase shielding attenuation.

[0053] A braided shielding element 40 is applied or woven onto the first membrane 20 and the second membrane 30 as a wire mesh shielding element 40. Alternatively, a spiral shielding element may be applied as a wire mesh shielding element 40. A sheath 50 is pressed onto the braided shielding element 40. The sheath 50 may be applied directly to the braided shielding element 40.

[0054] Alternatively, the shield 50 can be applied indirectly to the braided shield 40. For example, a separator or spacer can be provided between the braided shield 40 and the sheath 50. The separator can be formed as a film. The spacer can be in powder form.

[0055] The sheath 50 is made with a uniform wall thickness over the entire circumference of the cable 1. Therefore, the cable 1 made in this way has a cross-section that is not circular, but rather flattened oval or elliptical. The cable 1 is constructed to have a height-to-width ratio of at least approximately 1:2. The diameter of the inner sheath of the cable 1 can range from 1.50 × 2.5 mm to 2.5 × 4.3 mm (height × width, not circular, but rounded).

[0056] The specific configuration of the cable can be determined by Figure 1 In summary, the first film 20, specifically with a metal coating on one side, can form a first shield (= inner shield) or a first shield. In this case, the metal side is oriented inward. The inner shield is insulated from the outer shield formed by the braided shield 40 by a second non-metallic coated film 30. The inner shield can operate in a floating / ungrounded / ungrounded manner. Due to... Figure 1 The described cable construction example shows a combination of an insulating inner shield and an elliptical sheath geometry. Furthermore, there are two reverse-bundled membranes 20 and 30, with the inner (first) membrane 20 being metal-coated.

[0057] As Figure 1The cable construction illustrated as an example offers numerous advantages. Approximately 50% of the sheath material is saved due to the elliptical shape and / or constant sheath thickness. Copper consumption is reduced in the case of core materials 10a and 10b due to the elimination of stranding / pair stranding. The required copper amount can be reduced by approximately 0.5-1%. Furthermore, copper consumption is saved in the core material. At least one working step, namely the pair stranding of core materials, is eliminated during manufacturing. Very high torsional stability is achieved through the longitudinally extending core materials 10a and 10b. The core materials 10a and 10b remain largely continuous (always) fixed due to the reverse-bundled membranes 20 and 30. The special flattened-oval shape of the cable 1 contributes to providing sufficient bending fatigue stability. In bending tests along the wide axis of the cross-section, the cable turns towards the narrow side. Therefore, elongation in the outer line / cable area is minimized, and durability is improved. With the aid of the second membrane 30, the insulation from the (floating) inner shield to the braided shield acts as a protective layer or lining during bending. This avoids wear from any metal layers (such as aluminum layers) that may exist on the first membrane 20, and the shielding attenuation remains stable for a longer time than in the case of a standard cable.

[0058] The cable 1 described herein is not specifically circular, but can be described as "flat with narrow, rounded sides," or elliptical or oval. Furthermore, core pairs such as data pairs are not stranded, but rather the two cores 10a, 10b involved are parallel and adjacent to each other, held together by shields 20, 30. This flat external geometry of the cable 1 can be introduced into the cable compound of the harness during its creation and is fixed therein. In the case of a standard construction, twisting applied to the cable at random frequencies and directions during production and assembly can cause the two cores of the data pair to move and separate, thus compromising high-frequency characteristics.

[0059] The cable 1 described herein is free from twisting due to the parallel cores 10a and 10b. Therefore, torsional stress inevitably occurs during installation and use, negatively impacting it. Furthermore, a second membrane 30 is advantageous and is provided for this purpose. Additionally, an internally coated membrane with one laying direction can be provided on the cable 1 as a first membrane 20, and a membrane with the opposite laying direction can be provided as a second membrane 30. Therefore, it is guaranteed that regardless of the direction in which the cable 1 is twisted, one of the two membranes 20 and 30 will always tighten (become more taut), and thus, for example, the core pair maintains its good performance. In other words, it is guaranteed that one of the two membranes 20 and 30 is always tightened, and the two parallel cores 10a and 10b are firmly pressed against each other. Bending is not important for shielding. However, a conformal sheath 50 (outer sheath) is advantageous for bending. Due to the conformal outer sheath 50, the electrical line 1 (cable) is always positioned so that the force is evenly distributed, and bending occurs via the narrow side.

Claims

1. A cable (1) having: A first core material (10a) has a first electrical conductor (12a) and a first insulator (14a) surrounding the first electrical conductor (12a). The second core material (10b) has a second electrical conductor (12b) and a second insulator (14b) surrounding the second electrical conductor (12b), wherein the first core material (10a) and the second core material (10b) extend parallel to each other; A first membrane (20) surrounds the first core material (10a) and the second core material (10b). The second membrane (30) is specifically applied directly to the first membrane (20); A wire mesh shield (40), particularly a woven shield or a shielding braid or a spiral shield, is specifically applied directly to the second membrane (30); and A sheath (50) surrounds the wire mesh shield (40) circumferentially.

2. The cable (1) according to claim 1, wherein, The first electrical conductor (12a) is formed as a single conductor or a stranded conductor, and the second electrical conductor (12b) is formed as a single conductor or a stranded conductor.

3. The cable (1) according to claim 1 or 2, wherein, The first film (20) has a metal layer, particularly an aluminum layer.

4. The cable (1) according to claim 3, wherein, The metal layer is disposed on the inside of the first film (20).

5. The cable (1) according to claim 3 or 4, wherein, The first membrane (20) has another metal layer on the outside of the first membrane (20).

6. The cable (1) according to any one of claims 1 to 5, wherein, The first membrane (20) is in direct contact with the first insulator (14a) at least in part and with the second insulator (14b) at least in part.

7. The cable (1) according to any one of claims 1 to 6, wherein, The first membrane (20) is applied along the first laying direction.

8. The cable (1) according to any one of claims 1 to 7, wherein, The second membrane (30) does not have a metal layer and / or is made of plastic, particularly polyethylene terephthalate (PET) or polypropylene (PP).

9. The cable (1) according to any one of claims 1 to 8, wherein, The second membrane (30) is in direct contact with the first membrane (20) at least partially.

10. The cable (1) according to any one of claims 1 to 9, wherein, The second membrane (30) is applied along the second laying direction.

11. The cable (1) according to any one of claims 1 to 10, wherein, The second membrane (30) has one or more carbon-containing elements or materials.

12. The cable (1) according to any one of claims 1 to 11, wherein, A separating element or separator is provided between the wire mesh shield (40) and the sheath (50).

13. The cable (1) according to any one of claims 1 to 12, wherein, The sheath (50) has a wall thickness that is at least almost uniform or constant along its entire circumference.

14. The cable (1) according to any one of claims 1 to 13, wherein, The sheath (50) has an elliptical cross-section.

15. The cable (1) according to any one of claims 1 to 14, wherein: The first electrical conductor (12a) and / or the second electrical conductor (12b) have an outer diameter ranging from 0.30 mm to 0.62 mm; and / or The first core material (10a) and / or the second core material (10b) have an outer diameter ranging from 0.78 mm to 1.60 mm; and The inner side of the sheath (50) has height and width dimensions ranging from 1.50 mm × 2.50 mm to 2.5 mm × 4.3 mm.

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