JP2007280762A - Non-halogen coaxial cable, and multicore cable using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-halogen coaxial cable excelling in an electric characteristic and a mechanical characteristic without containing a fluorine resin; and to provide a multicore cable using it. <P>SOLUTION: In this non-halogen coaxial cable, the circumference of an internal conductor 1 formed by intertwining tin-plated soft copper wires (or tin-plated copper alloy wires) with one another is coated with a polymer containing, as a main constituent, a PPE resin (or PPO) as an insulator 2; a shield layer 3 formed by spirally winding a tin-plated soft copper wire (or a tin-plated copper alloy wire) is arranged in the circumference of the insulator 2; and a jacket layer 4 is arranged in the circumference of the shield layer 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a micro coaxial cable used for differential signal transmission, and more particularly to a non-halogen coaxial cable and a multicore cable using the same.

  A cable used for signal transmission of a liquid crystal display is required to have electrical characteristics such as EMI and SKEW, and therefore an ultrafine coaxial cable is used (see Patent Document 1). In addition, with an increase in signal transmission speed, an increasing number of devices use a two-core parallel coaxial cable that has better EMI characteristics and SKEW than an ultrafine coaxial cable (see Patent Document 2).

JP 2002-352640 A Japanese Patent Laid-Open No. 2003-22718 Japanese Patent Laid-Open No. 5-28838 Japanese Patent Laid-Open No. 5-28839

  Conventional ultra-fine coaxial cables and two-core parallel coaxial cables use a fluorine resin as an insulator. Conventionally, in order to satisfy electrical characteristics such as characteristic impedance, capacitance, attenuation, and thin-wall extrusion with a thickness of 0.1 mm or less, the use of a fluorine resin as an insulator has been indispensable.

  However, since fluorine may be regulated as an environmentally hazardous substance, like chlorine and bromine, an ultrafine coaxial cable that does not contain a fluorine resin in an insulator is required.

  Accordingly, an object of the present invention is to provide a non-halogen coaxial cable having good electrical characteristics and mechanical characteristics and containing no fluorine resin, and a multicore cable using the same.

  In order to achieve the above object, the invention of claim 1 is characterized in that a polymer mainly composed of PPE resin or PPO is used as an insulator on the outer periphery of an inner conductor obtained by twisting tinned annealed copper wire or tinned copper alloy wire. A non-halogen coaxial cable characterized in that a shield layer in which a tin-plated hard copper wire or a tin-plated copper alloy wire is horizontally wound is provided on the outer periphery of the insulator, and a jacket layer is provided on the outer periphery of the shield layer. is there.

  The invention of claim 2 covers the outer periphery of the inner conductor twisted with a tin-plated annealed copper wire or tin-plated copper alloy wire with a polymer mainly composed of PPE resin or PPO as an insulator, and on the outer periphery of the insulator. A non-halogen coaxial cable comprising a shield layer braided with a tin-plated hard copper wire or a tin-plated copper alloy wire, and a jacket layer provided on the outer periphery of the shield layer.

  In the invention of claim 3, the core formed by coating the outer conductor of a tin-plated annealed copper wire or tin-plated copper alloy wire with a polymer mainly composed of PPE resin or PPO as an insulator on the outer periphery is parallel and parallel. And a shield layer in which a tin-plated hard copper wire or a tin-plated copper alloy wire is double-wrapped on the outer periphery of the two-core core, and a jacket layer is provided on the outer periphery of the shield layer. This is a non-halogen coaxial cable.

  According to the invention of claim 4, two cores are formed in parallel by coating a core of PPE resin or PPO as a main component on the outer periphery of an inner conductor formed by twisting tinned annealed copper wire or tinned copper alloy wire. Non-halogen coaxial, characterized in that a shield layer in which a tin-plated hard copper wire or a tin-plated copper alloy wire is braided is provided on the outer periphery of the two-core core, and a jacket layer is provided on the outer periphery of the shield layer. It is a cable.

  A fifth aspect of the present invention is the non-halogen coaxial cable according to any one of the first to fourth aspects, wherein the jacket layer is made of a polyester resin.

  The invention according to claim 6 is the non-halogen coaxial cable according to any one of claims 1 to 4, wherein the jacket layer is made of a polymer mainly composed of PPE resin or PPO.

The invention of claim 7 comprises an inner conductor in which a plurality of tin-plated annealed copper wires or tin-plated copper alloy wires having a diameter of 0.018 to 0.082 mm are twisted together, and a polymer mainly composed of PPE resin or PPO. A shield having a rate of 2.4 to 3.3, in which an insulator coated on the outer periphery of the inner conductor and a tin-plated hard copper wire or a tin-plated copper alloy wire are wound side by side, and the shield is coated on the outer periphery of the insulator A multi-core cable in which a plurality of coaxial cables composed of a layer and a jacket layer coated on the outer periphery of the shield layer are arranged in a ribbon shape,
A multi-core cable characterized in that the coaxial cable has a capacitance of 100 to 140 pF / m, a characteristic impedance of 50 ± 5 Ω, and an attenuation at a frequency of 10 MHz of 0.15 to 1.00 dB / m. is there.

The invention of claim 8 comprises an inner conductor formed by twisting seven tin-plated annealed copper wires or tin-plated copper alloy wires having a diameter of 0.028 to 0.032 mm, and a polymer mainly composed of PPE resin or PPO. The rate is 2.4 to 3.3 and the thickness is 0.08 to 0.14 mm, and the insulator coated on the outer periphery of the inner conductor and the tin-plated hard copper wire or the tin-plated copper alloy wire are wound horizontally. And a shield layer having a thickness of 0.025 to 0.035 mm coated on the outer periphery of the insulator and a jacket layer having an outer diameter of 0.35 to 0.50 mm coated on the outer periphery of the shield layer. A first coaxial cable,
It consists of an inner conductor formed by twisting seven tin-plated annealed copper wires or tin-plated copper alloy wires having a diameter of 0.048 to 0.052 mm, and a polymer mainly composed of PPE resin or PPO, and has a dielectric constant of 2.4 to 3 .3 and a thickness of 0.05 to 0.11 mm, and an insulator coated on the outer periphery of the inner conductor and a tin-plated hard copper wire or a tin-plated copper alloy wire are wound horizontally, and on the outer periphery of the insulator A second coaxial cable composed of a shield layer having a coated thickness of 0.025 to 0.050 mm and a jacket layer having an outer diameter of 0.35 to 0.50 mm coated on the outer periphery of the shield layer; ,
A multi-core cable in which a plurality of cables are arranged in a ribbon shape,
The first coaxial cable and the second coaxial cable have an electrostatic capacity of 100 to 140 pF / m, a characteristic impedance of 50 ± 5 Ω, and an attenuation at a frequency of 10 MHz of 0.15 to 1.00 dB / m. It is a multicore cable characterized by being.

  The present invention can obtain a non-halogen coaxial cable that does not contain a fluorine resin in an insulator and has the same electrical and mechanical characteristics as a conventional coaxial cable that uses a fluorine resin as an insulator.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The present invention is characterized by having an insulator mainly composed of PPE or PPO on the outer periphery of the conductor.

  A cross-sectional view of a non-halogen coaxial cable according to a preferred embodiment of the present invention is shown in FIG.

  The non-halogen coaxial cable according to the present embodiment shown in FIG. 1 is mainly made of PPE resin (or PPO) as an insulator 2 on the outer periphery of an inner conductor 1 twisted with tin-plated annealed copper wire (or tin-plated copper alloy wire). An outer conductor (shield layer) 3 composed of a tin-plated hard copper wire (or tin-plated copper alloy wire) is provided on the outer periphery of the insulator 2, and the outer conductor 3 is coated on the outer periphery of the outer conductor 3. A jacket layer 4 is provided.

The inner conductor 1 is preferably a stranded wire of a tin-plated annealed copper wire (or tin-plated copper alloy wire), but a single wire of a tin-plated annealed copper wire (or tin-plated copper alloy wire), a silver-plated annealed copper wire (or silver-plated copper alloy) A stranded wire or a single wire may be used. Further, a stranded wire or a single wire of a copper-coated steel wire may be used as the inner conductor 1. The conductor size of the inner conductor 1 is desirably 30 AWG (American Wire Gauge) or less (the cross-sectional area is 0.05097 mm ² or less). For example, when the inner conductor 1 is composed of seven stranded wires, the outer diameter of the strand is 0. .102 mm or less. This is because if the conductor size of the inner conductor 1 is more than 30 AWG (31 AWG or more), it is possible to cope with the covering molding with polyethylene conventionally used as the insulator 2.

  The insulator 2 is made of a polymer alloy mainly composed of PPE (or PPO). Other components include polypropylene, polystyrene, polyethylene and the like. Since the insulator 2 is adjusted to have a characteristic impedance of about 50Ω and a capacitance per unit length of about 100 pF / m, its thickness is 0.4 to 2.0 times the outer diameter of the inner conductor 1. Is desirable.

  The outer conductor 3 is configured by braiding a tin-plated hard copper wire (or tin-plated copper alloy wire) or braiding a tin-plated hard copper wire (or tin-plated copper alloy wire). Instead of tin-plated hard copper wire (or tin-plated copper alloy wire), silver-plated annealed copper wire or silver-plated hard copper wire (or silver-plated copper alloy wire) may be used. A second shield layer (not shown) made of a copper-deposited polyester tape or the like may be provided on the inner layer (or outer layer) side of the outer conductor 3.

  The jacket layer 4 is provided on the outer periphery of the outer conductor 3 and is composed of a polymer alloy mainly composed of polyester or PPE (or PPO), and other components include polypropylene, polystyrene, polyethylene, and the like.

  Next, the operation of the present embodiment will be described.

  In conventional micro coaxial cables, when extruding a thin wall with a thickness of 0.1 mm or less, fluororesins such as PFA and ETFE are used, and long extrudates must be stably manufactured using a resin other than fluororesin. Was difficult. Therefore, the present embodiment is characterized in that a polymer alloy containing PPE (or PPO), which is an engineering plastic, as a main component is used as an insulating material for thin-wall extrusion that does not contain a fluorine resin. By using a polymer alloy containing PPE (or PPO) as the main component, it becomes possible to extrude a thin wall with a thickness of 0.1 mm or less, and stable production of long extrudates using resins other than fluorine resin. can do.

  In addition, these polymer alloys do not contain fluorine, chlorine, bromine and the like, and are non-halogen, so that there is an advantage that the load on the environment is small.

  Furthermore, these polymer alloys have a stable dielectric constant of 2.8 and a dielectric loss tangent of 0.0005 to 0.0006 from 1 MHz to 100 MHz, and stable electrical characteristics in the finished coaxial cable product. There is an advantage. That is, according to the non-halogen coaxial cable of the present embodiment, mechanical characteristics and electrical characteristics (for example, EMI characteristics and SKEW) equivalent to those of a conventional ultrafine coaxial cable using a fluorine resin can be realized.

  Next, another embodiment of the present invention will be described with reference to the accompanying drawings.

  A cross-sectional view of a non-halogen coaxial cable according to another preferred embodiment of the present invention is shown in FIG.

  The non-halogen coaxial cable shown in FIG. 1 is a cable having a single inner conductor. On the other hand, the non-halogen coaxial cable according to the present embodiment shown in FIG. 2 is a two-core parallel coaxial cable having two inner conductors.

  The non-halogen coaxial cable according to the present embodiment shown in FIG. 2 is mainly made of PPE resin (or PPO) as an insulator 6 on the outer periphery of an inner conductor 5 in which tin-plated annealed copper wire (or tin-plated copper alloy wire) is twisted. Two cores 9 that are coated with the polymer as a component are arranged in parallel in parallel, and an outer conductor (tin-plated copper wire (or tin-plated copper alloy wire)) is formed on the outer periphery of the two-core core 10. A shield layer) 7 is provided, and a jacket layer 8 is provided on the outer periphery of the outer conductor 7.

  As the constituent materials of the inner conductor 5, the insulator 6, and the jacket layer 8, the same constituent materials as those of the inner conductor 1, the insulator 2, and the jacket layer 4 of the non-halogen coaxial cable shown in FIG.

  The outer conductor 7 is composed of a double-side wound tin-plated hard copper wire (or tin-plated copper alloy wire) or a braid formed by braiding a tin-plated hard copper wire (or tin-plated copper alloy wire). . Instead of tin-plated hard copper wire (or tin-plated copper alloy wire), silver-plated annealed copper wire or silver-plated hard copper wire (or silver-plated copper alloy wire) may be used. A second shield layer (not shown) made of copper-deposited polyester tape or the like may be provided on the inner layer (or outer layer) side of the outer conductor 7.

  Since the non-halogen coaxial cable according to the present embodiment has better EMI characteristics and SKEW than the non-halogen coaxial cable shown in FIG. 1, the signal transmission can be further speeded up.

  Although the case where the core 9 has two cores has been described in the present embodiment, the present invention is not particularly limited thereto, and the core 9 may have three or more cores.

  A cross-sectional view of a multicore cable using a non-halogen coaxial cable according to another preferred embodiment of the present invention is shown in FIG.

  The multicore cable according to the present embodiment shown in FIG. 3 is a multicore wire using the non-halogen coaxial cable shown in FIG. 1, and n coaxial cables 11 are juxtaposed in parallel, and adhesive labels are respectively provided on the upper and lower surfaces thereof. 13 are provided in a ribbon shape (flat cable shape). The center-to-center distance (pitch P) between adjacent coaxial cables 11 and 11 is, for example, 1 mm or less.

  The coaxial cable 11 includes, for example, an inner conductor 14 formed by twisting seven tin-plated annealed copper wires (or tin-plated copper alloy wires) having a diameter of 0.018 to 0.082 mm and PPE resin (or PPO) as main components. It is made of a polymer, has a dielectric constant of 2.4 to 3.3, and is formed by horizontally winding an insulator 15 coated on the outer periphery of the inner conductor 14 and a tin-plated hard copper wire (or a tin-plated copper alloy wire). The shield layer 16 is covered on the outer periphery of the insulator 15 and the jacket layer 17 is covered on the outer periphery of the shield layer 16. The coaxial cable 11 has a capacitance per unit length of 100 to 140 pF / m, a characteristic impedance of 50 ± 5Ω, and an attenuation of 0.15 to 1.00 dB / m.

  FIG. 4 shows a cross-sectional view of a multicore cable using a non-halogen coaxial cable according to still another preferred embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same member as FIG.

  The multicore cable shown in FIG. 3 was a multicore wire using coaxial cables having the same size of the inner conductor. On the other hand, the multicore cable according to the present embodiment shown in FIG. 4 is a multicore wire in which coaxial cables having different internal conductor sizes are combined.

  Specifically, four coaxial cables 21 and (n-4) coaxial cables 22 are juxtaposed in parallel, and adhesive labels 13 are stacked on the upper and lower surfaces of the ribbon cables (flat cable shape). It is. The pitch P of the adjacent coaxial cables 21, 21 and 22, 22 is set to 1 mm or less, for example.

  The coaxial cable 21 (second coaxial cable) has the same structure as the coaxial cable 11 shown in FIG. 3, for example, a tin-plated annealed copper wire (or tin-plated copper alloy wire) having a diameter of 0.028 to 0.032 mm. ) And a polymer mainly composed of PPE resin (or PPO), having a dielectric constant of 2.4 to 3.3 and a thickness of 0.05 to 0.11 mm. The insulator 15 covered on the outer periphery of the inner conductor 14 and a tin-plated hard copper wire (or tin-plated copper alloy wire) are wound horizontally, and the thickness covered on the outer periphery of the insulator 15 is 0.025 to A shield layer 16 having a thickness of 0.050 mm and a jacket layer 17 having an outer diameter of 0.35 to 0.50 mm coated on the outer periphery of the shield layer 16 are configured.

  The coaxial cable 22 (first coaxial cable) has the same structure as the coaxial cable 11 shown in FIG. 3, for example, a tin-plated annealed copper wire (or tin-plated copper alloy wire) having a diameter of 0.048 to 0.052 mm. ) And an inner conductor 24 twisted together and a polymer mainly composed of PPE resin (or PPO), having a dielectric constant of 2.4 to 3.3 and a thickness of 0.08 to 0.14 mm. The insulator 25 covered on the outer periphery of the inner conductor 24 and a tin-plated hard copper wire (or tin-plated copper alloy wire) are wound horizontally, and the thickness covered on the outer periphery of the insulator 25 is 0.025 to A shield layer 26 having a thickness of 0.035 mm and a jacket layer 27 having an outer diameter of 0.35 to 0.50 mm coated on the outer periphery of the shield layer 26 are configured.

  Although the coaxial cables 21 and 22 have the same cable outer diameter, the coaxial cable 22 has a larger size of the core wire constituting the inner conductor (cross-sectional area of the inner conductor) than the coaxial cable 21 and is insulated. The body has a thin layer thickness. In the multicore cable according to the present embodiment, for example, the coaxial cable 22 is used as a power line, and the coaxial cable 21 is used as a signal line.

  The coaxial cable 21 has a capacitance per unit length of 100 to 140 pF / m, a characteristic impedance of 50 ± 5 Ω, and an attenuation of 0.15 to 1.00 dB / m.

  The multi-core cable shown in FIGS. 3 and 4 is, for example, a cable that is wired in a narrow space such as a hinge portion of a notebook computer, and more specifically, a cable that connects the main body of the notebook computer and the liquid crystal screen through the hinge portion. Can be used as

  In addition, these multi-core cables have electrical characteristics equivalent to those of conventional multi-core cables using ultrafine coaxial cables, and can achieve better bending resistance than conventional multi-core cables.

  In the multicore cable shown in FIG. 3 and FIG. 4, the case where the one-core structure shown in FIG. 1 is used as the coaxial cable has been described as an example, but the coaxial cable is shown in FIG. 2. A two-core parallel coaxial cable may be used.

  Seven copper alloy wires were twisted to produce five types of internal conductors (36 AWG, 38 AWG, 40 AWG, 42 AWG, 44 AWG).

  Two types of insulators were coated on the outer periphery of each inner conductor. Here, what coated PFA as an insulator was made into the comparative example (samples 1-5). Further, examples (samples 6 to 10) were coated with a polymer mainly composed of PPO having a dielectric constant of 2.8 as an insulator.

  An outer conductor (shield layer) made of hard copper wire was provided on the outer periphery of the insulator of each sample 1 to 10, and a jacket was provided by winding polyester tape around the outer conductor to produce a coaxial cable.

  Table 1 shows the structure, size, electrical characteristics, and mechanical characteristics of each coaxial cable.

  As shown in Table 1, the coaxial cable of the example using PPO as the insulator (non-halogen coaxial cable of the present invention) is comparable to the coaxial cable of the comparative example using the PFA as the insulator (conventional coaxial cable). Of mechanical and electrical properties. In particular, regarding the mechanical characteristics (bending life bending), the coaxial cable of the example was slightly superior to the coaxial cable of the comparative example.

  Seven copper alloy wires were twisted to produce five types of internal conductors (36 AWG, 38 AWG, 40 AWG, 42 AWG, 44 AWG).

  Two types of insulators were coated on the outer periphery of each inner conductor. Here, what coat | covered PFA as an insulator was made into the comparative example (samples 11-15). Moreover, what coat | covered the polymer which has PPE whose dielectric constant is 2.4 as a main component as an insulator was made into the Example (samples 16-20).

  An outer conductor (shield layer) made of hard copper wire was provided on the outer periphery of the insulator of each sample 1 to 10, and a jacket was provided by winding polyester tape around the outer conductor to produce a coaxial cable.

  Table 2 shows the structure, size, electrical characteristics, and mechanical characteristics of each coaxial cable.

  As shown in Table 2, the coaxial cable of the example using PPE as the insulator (non-halogen coaxial cable of the present invention) had the same mechanical and electrical characteristics as the coaxial cable of the comparative example. In particular, regarding the mechanical characteristics (bending life bending), the coaxial cable of the example was slightly superior to the coaxial cable of the comparative example.

  In addition, regarding the electrical characteristics of capacitance and attenuation, the coaxial cable using PPE in [Example 2] was slightly better than the coaxial cable using PPO in [Example 1].

  Insulation of a polymer mainly composed of PPE having the same outer diameter as that of the coaxial cable of Sample 18 in [Example 2] (a 40 AWG coaxial cable having a characteristic impedance of 50Ω) and a dielectric constant of 2.4. The multi-core cable shown in FIG. 4 was produced by combining 36 AWG coaxial cables having a body.

  Similarly, the coaxial cable of sample 19 in [Example 2] (42 AWG coaxial cable having a characteristic impedance of 50Ω) and PPE having the same outer diameter as that of the coaxial cable and a dielectric constant of 2.4 are the main components. The multi-core cable shown in FIG. 4 was produced by combining 38 AWG coaxial cables having a polymer insulator.

  In addition, the coaxial cable of Sample 20 (a 44 AWG coaxial cable with a characteristic impedance of 50Ω) in [Example 2] and a polymer mainly composed of PPE having the same outer diameter as that of the coaxial cable and a dielectric constant of 2.4. The multi-core cable shown in FIG. 4 was produced by combining 40 AWG coaxial cables having the following insulators.

  40 AWG, 42 AWG, and 44 AWG coaxial cables are used as signal lines, and 36 AWG, 38 AWG, and 40 AWG coaxial cables are used as power lines. A power line having a larger cross-sectional area of the inner conductor than the signal line is used. In addition, since the power line performs terminal processing (peeling) together with the signal line, the outer diameter dimension thereof is the same as that of the signal line.

  Table 3 shows the structure, size, electrical characteristics, and mechanical characteristics of the coaxial cable in each multi-core cable. Here, for the power line, the capacitance, attenuation, and characteristic impedance were not taken into account, and thus these values were not measured.

  [Example 1] Sample 8 coaxial cable (a 40 AWG coaxial cable having a characteristic impedance of 50Ω) and a polymer insulation mainly composed of PPO having the same outer diameter as the coaxial cable and a dielectric constant of 2.8 The multi-core cable shown in FIG. 4 was produced by combining 36 AWG coaxial cables having a body.

  Similarly, the coaxial cable of sample 9 in [Example 1] (42 AWG coaxial cable with a characteristic impedance of 50Ω) and PPO having the same outer diameter as that coaxial cable and a dielectric constant of 2.8 are the main components. The multi-core cable shown in FIG. 4 was produced by combining 38 AWG coaxial cables having a polymer insulator.

  In addition, the coaxial cable (sample 44 AWG coaxial cable with characteristic impedance of 50Ω) of Sample 10 in [Example 1] and a polymer mainly composed of PPO having the same outer diameter as the coaxial cable and a dielectric constant of 2.8. The multi-core cable shown in FIG. 4 was produced by combining 40 AWG coaxial cables having the following insulators.

  40 AWG, 42 AWG, and 44 AWG coaxial cables are used as signal lines, and 36 AWG, 38 AWG, and 40 AWG coaxial cables are used as power lines. A power line having a larger cross-sectional area of the inner conductor than the signal line is used. In addition, since the power line performs terminal processing (peeling) together with the signal line, the outer diameter dimension thereof is the same as that of the signal line.

  Table 4 shows the structure, size, electrical characteristics, and mechanical characteristics of the coaxial cable in each multicore cable. Here, for the power line, the capacitance, attenuation, and characteristic impedance were not taken into account, and thus these values were not measured.

  According to the multicore cable of [Example 3] and [Example 4], the same electrical characteristics as those of the conventional multicore cable using the ultrafine coaxial cable can be obtained, and better than the conventional multicore cable. Bending resistance was obtained.

  In addition, regarding the electrical characteristics of capacitance and attenuation, the multicore cable using PPE in [Example 3] was slightly better than the multicore cable using PPO in [Example 4]. .

1 is a cross-sectional view of a non-halogen coaxial cable according to a preferred embodiment of the present invention. It is a cross-sectional view of a non-halogen coaxial cable according to another preferred embodiment of the present invention. It is a cross-sectional view of a multi-core cable using a non-halogen coaxial cable according to another preferred embodiment of the present invention. It is a cross-sectional view of a multi-core cable using a non-halogen coaxial cable according to still another preferred embodiment of the present invention.

Explanation of symbols

1 Inner conductor 2 Insulator 3 Shield layer 4 Jacket layer

Claims (8)

  The outer conductor of a tin-plated annealed copper wire or tin-plated copper alloy wire is covered with a polymer mainly composed of polyphenylene ether (hereinafter referred to as PPE) resin or polyphenylene oxide (hereinafter referred to as PPO) as an insulator. A non-halogen coaxial cable, wherein a shield layer in which a tin-plated hard copper wire or a tin-plated copper alloy wire is horizontally wound is provided on the outer periphery of the insulator, and a jacket layer is provided on the outer periphery of the shield layer.   An outer conductor of a tin-plated annealed copper wire or a tin-plated copper alloy wire is covered with a polymer mainly composed of PPE resin or PPO as an insulator, and the outer periphery of the insulator is coated with a tin-plated hard copper wire or A non-halogen coaxial cable comprising a shield layer braided with a tin-plated copper alloy wire and a jacket layer provided on the outer periphery of the shield layer.   Two cores made of PPE resin or PPO as a main component are arranged in parallel on the outer periphery of the inner conductor formed by twisting tin-plated annealed copper wire or tin-plated copper alloy wire. A non-halogen coaxial cable, wherein a shield layer in which a tin-plated hard copper wire or a tin-plated copper alloy wire is wound twice horizontally is provided on the outer periphery of the core core, and a jacket layer is provided on the outer periphery of the shield layer.   Two cores made of PPE resin or PPO as a main component are arranged in parallel on the outer periphery of the inner conductor formed by twisting tin-plated annealed copper wire or tin-plated copper alloy wire. A non-halogen coaxial cable, wherein a shield layer braided with a tin-plated hard copper wire or a tin-plated copper alloy wire is provided on the outer periphery of the core core, and a jacket layer is provided on the outer periphery of the shield layer.   The non-halogen coaxial cable according to any one of claims 1 to 4, wherein the jacket layer is made of a polyester resin.   The non-halogen coaxial cable according to any one of claims 1 to 4, wherein the jacket layer is made of a polymer mainly composed of PPE resin or PPO. It is composed of an inner conductor formed by twisting a plurality of tin-plated annealed copper wires or tin-plated copper alloy wires having a diameter of 0.018 to 0.082 mm, and a polymer mainly composed of PPE resin or PPO, and has a dielectric constant of 2.4 to 3 .3, an insulator coated on the outer periphery of the inner conductor, a tin-plated hard copper wire or a tin-plated copper alloy wire, and a shield layer coated on the outer periphery of the insulator, and an outer periphery of the shield layer A multi-core cable in which a plurality of coaxial cables configured with a jacket layer covered with a ribbon are arranged side by side,
A multi-core cable, wherein the coaxial cable has an electrostatic capacity of 100 to 140 pF / m, a characteristic impedance of 50 ± 5 Ω, and an attenuation at a frequency of 10 MHz of 0.15 to 1.00 dB / m. It consists of an inner conductor formed by twisting seven tin-plated annealed copper wires or tin-plated copper alloy wires having a diameter of 0.028 to 0.032 mm, and a polymer mainly composed of PPE resin or PPO, and has a dielectric constant of 2.4 to 3 .3 and a thickness of 0.08 to 0.14 mm, and an insulator coated on the outer periphery of the inner conductor and a tin-plated hard copper wire or a tin-plated copper alloy wire are laterally wound to form an outer periphery of the insulator. A first coaxial cable including a shield layer having a coated thickness of 0.025 to 0.035 mm and a jacket layer having an outer diameter of 0.35 to 0.50 mm coated on the outer periphery of the shield layer; ,
It consists of an inner conductor formed by twisting seven tin-plated annealed copper wires or tin-plated copper alloy wires having a diameter of 0.048 to 0.052 mm, and a polymer mainly composed of PPE resin or PPO, and has a dielectric constant of 2.4 to 3 .3 and a thickness of 0.05 to 0.11 mm, and an insulator coated on the outer periphery of the inner conductor and a tin-plated hard copper wire or a tin-plated copper alloy wire are wound horizontally, and on the outer periphery of the insulator A second coaxial cable composed of a shield layer having a coated thickness of 0.025 to 0.050 mm and a jacket layer having an outer diameter of 0.35 to 0.50 mm coated on the outer periphery of the shield layer; ,
A multi-core cable in which a plurality of cables are arranged in a ribbon shape,
The first coaxial cable and the second coaxial cable have an electrostatic capacity of 100 to 140 pF / m, a characteristic impedance of 50 ± 5 Ω, and an attenuation at a frequency of 10 MHz of 0.15 to 1.00 dB / m. A multicore cable characterized by being.

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