A lightweight ultra-fine carbon fiber medical wire and medical cable signal cable core

Abstract

The present application relates to a lightweight ultra-fine carbon fiber medical wire and a medical cable signal cable core, wherein the central conductor is formed by twisting a number of carbon fiber conductors, and the surface of the carbon fiber conductor is coated with a silver layer. By replacing conventional copper conductors and shielding layer metals with low-density conductive carbon fiber conductors, the lightweight development of medical cables is achieved. At the same time, based on the advantages of high tensile strength, low deformation, and low sag of carbon fiber, the tensile strength of the cable is enhanced to meet the frequent pulling requirements of medical cables. In addition, the chemical properties of the carbon fiber conductor are stable and will not oxidize. It does not contain copper ions that catalyze the aging of the insulating layer resin and will not reduce the service life of the cable. The surface of the carbon fiber conductor is coated with a silver layer, which can reduce the signal conduction loss under the skin effect and ensure that the transmitted signal is not distorted in a complex electromagnetic environment.

Description

Technical Field

[0001] The present application relates to the technical field of medical cables, and in particular to a lightweight ultra-fine carbon fiber medical wire and a medical cable signal core. Background Art

[0002] Medical cables, especially signal cables used to connect probes and diagnostic equipment on the patient's body, are often bent and dragged during use. At present, in the production field of medical cables, the existing core wire structure still uses copper as the signal transmission conductor, and then constructs an electromagnetic shielding layer by wrapping with aluminum foil or braiding copper wire obliquely. However, the density of metal is relatively high, which is not conducive to the lightweight development of wires; and the tensile strength of copper conductors is low, but the current medical core wire conductors are developing in the direction of ultra-thinness, and the tensile strength of the cables is insufficient, so they are very easy to break during production or use. In addition, copper is easily oxidized, resulting in increased resistance, and copper ions will also catalyze the aging and degradation of the plastic in the cable insulation layer, reducing the service life of the cable. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a lightweight ultra-fine carbon fiber medical wire, including a central conductor, an insulating layer wrapped around the central conductor from the inside to the outside, a carbon fiber shielding layer and an inner coating layer, wherein the central conductor is formed by twisting a plurality of carbon fiber conductors, and the surface of the carbon fiber conductor is coated with a silver layer.

[0004] Preferably, the carbon fiber conductor has a diameter of 5-6 um.

[0005] Preferably, the silver layer has a thickness of 0.5-2 μm.

[0006] Preferably, the central conductor is formed by twisting at least 7 carbon fiber conductors.

[0007] Preferably, the carbon fiber shielding layer is made by weaving or obliquely wrapping a plurality of carbon fiber conductors.

[0008] Preferably, the insulating layer and the inner coating are made of fluoroplastics.

[0009] Preferably, the insulating layer comprises an inner skin layer, a foaming layer and an outer skin layer.

[0010] Preferably, a medical cable signal core comprises the above-mentioned lightweight ultra-fine carbon fiber medical wire, wherein the carbon fiber medical wire serves as a basic structural unit of the medical cable signal core.

[0011] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: by setting an insulating layer, a carbon fiber shielding layer and an inner layer that are wrapped around the central conductor from the inside to the outside, the central conductor is formed by twisting a number of carbon fiber conductors, and the surface of the carbon fiber conductor is plated with a silver layer. By replacing conventional copper conductors and shielding layer metals with low-density conductive carbon fiber conductors, the lightweight development of medical cables is achieved. At the same time, based on the advantages of high tensile strength, low deformation and low sag of carbon fiber, the tensile strength of the cable is enhanced to meet the frequent pulling and use requirements of medical cables. In addition, the chemical properties of carbon fiber conductors are stable and will not oxidize. They do not contain copper ions that catalyze the aging of the insulating layer resin and will not reduce the service life of the cable. The surface of the carbon fiber conductor is plated with a silver layer, which can reduce the signal conduction loss under the skin effect and ensure that the transmitted signal is not distorted in a complex electromagnetic environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0013] Figure 1 This is a schematic diagram of a lightweight ultra-fine carbon fiber medical wire according to an embodiment of the present application. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0015] Example

[0016] In order to solve the above technical problems, this embodiment provides a lightweight ultra-fine carbon fiber medical wire, such as Figure 1As shown, it includes a central conductor 10, an insulating layer 20 wrapped around the central conductor 10 from the inside to the outside, a carbon fiber shielding layer 30 and an inner layer 40. The central conductor 10 is formed by twisting a number of carbon fiber conductors 11, and the surface of the carbon fiber conductor 11 is plated with a silver layer 12. By replacing the conventional copper conductor and the shielding layer metal with a low-density conductive carbon fiber conductor, the lightweight development of the medical cable is achieved. At the same time, based on the advantages of high tensile strength, low deformation and low sag of carbon fiber, the tensile strength of the cable is enhanced to meet the frequent pulling requirements of the medical cable. In addition, the chemical properties of the carbon fiber conductor 11 are stable and will not oxidize. It does not contain copper ions that catalyze the aging of the resin in the insulating layer 20, and will not reduce the service life of the cable. The silver layer 12 is plated on the surface of the carbon fiber conductor 11, which can reduce the signal conduction loss under the skin effect and ensure that the signal is transmitted without distortion in a complex electromagnetic environment.

[0017] Specifically, the diameter of the carbon fiber conductor 11 is 5-6um, preferably, the diameter of the carbon fiber conductor 11 is 5um. At present, the diameter of the copper wire conductor is the thinnest at 23um, while the wire diameter of the carbon fiber conductor 11 can be 5um. The conductor diameter is small, and the wire diameter of the subsequent core wire and the finished product can be reduced, so as to achieve the effect of saving materials and reducing weight. The density of copper is 8.96g / cm3, while the density of carbon fiber is 1.5-2.0g / cm3, which is only 1 / 5 of that of copper, and can effectively reduce the weight of the wire. At the same time, the tensile modulus of copper is 0.11GPa, while the tensile modulus of carbon fiber is 230Gpa, which is 2,000 times that of copper. When the carbon fiber conductor 11 is extruded, the wire will not be deformed even if the wire tension is applied very large, and stable wire release can be achieved, which is convenient for adjusting the concentricity and reducing the difficulty of core wire processing. The tensile strength of copper is 209MPa, while the tensile strength of carbon fiber reaches 3.5Gpa, which is 16 times that of copper, which can improve the tensile strength of the cable and reduce the risk of scrapping. The tensile strength of the Shixin cable is high enough to withstand the tensile stress during dragging, especially the conductor is not easily broken, ensuring that the cable has a high degree of reliability.

[0018] Copper conductors will inevitably produce copper ions, which catalyze the decomposition of peroxides into free radicals and aggravate the aging of the insulation layer. Carbon fibers are chemically stable and do not promote the aging of the insulation layer, so the cable has a longer service life. At the same time, a silver layer 12 is plated on the surface of the carbon fiber conductor 11. Furthermore, the thickness of the silver layer 12 is 0.5-2μm. Preferably, the thickness of the silver layer 12 is 2μm, and the silver layer 12 can reduce the signal conduction loss under the skin effect. Among them, the center conductor 10 is formed by twisting at least 7 carbon fiber conductors 11. The carbon fiber conductors 11 are concentrically twisted.

[0019] Furthermore, the insulating layer 20 includes an inner skin layer 21, a foaming layer 22 and an outer skin layer 23. The insulating layer 20 is a skin-foam-skin structure, the inner skin layer 21 and the outer skin layer 23 are solid structures, the foaming layer 22 is a foaming structure, the foaming degree of the foaming layer 22 is 70%, and the introduction of air into the foaming layer 22 can reduce the average dielectric constant of the insulating medium and reduce the dielectric loss.

[0020] Since there are many instruments and equipment in the ward, medical cables need to have good electromagnetic shielding performance to ensure that the signal is transmitted without distortion in a complex electromagnetic environment. To this end, a carbon fiber shielding layer 30 is provided on the periphery of the insulating layer 20, and the carbon fiber shielding layer 30 is made of a plurality of carbon fiber conductors woven or obliquely wrapped. The carbon fiber shielding layer 30 is made of a plurality of bundles of highly conductive carbon fiber conductors woven on the surface of the core wire, which can further improve the tensile strength of the wire while shielding electromagnetic interference.

[0021] The insulating layer 20 and the inner layer 40 are made of fluoroplastics, which not only have high breakdown field strength and good safety, but also have a temperature resistance of -40 to 200°C and can withstand high-temperature sterilization.

[0022] On the other hand, this embodiment also provides a medical cable signal core, including the above-mentioned lightweight ultra-fine carbon fiber medical wire, a plurality of lightweight ultra-fine carbon fiber medical wires constitute the medical cable signal core, and the carbon fiber medical wire serves as a basic structural unit of the medical cable signal core.

[0023] In summary, the present application scheme is provided with an insulating layer, a carbon fiber shielding layer and an inner layer that are wrapped around the central conductor from the inside out. The central conductor is formed by twisting a number of carbon fiber conductors, and the surface of the carbon fiber conductor is plated with a silver layer. By replacing conventional copper conductors and shielding layer metals with low-density conductive carbon fiber conductors, the lightweight development of medical cables is achieved. At the same time, based on the advantages of carbon fiber's high tensile strength, low deformation, and low sag, the tensile strength of the cable is enhanced to meet the needs of frequent pulling of medical cables. In addition, the chemical properties of carbon fiber conductors are stable and will not oxidize. They do not contain copper ions that catalyze the aging of the insulating layer resin and will not reduce the service life of the cable. The surface of the carbon fiber conductor is plated with a silver layer, which can reduce the signal conduction loss under the skin effect and ensure that the transmitted signal is not distorted in a complex electromagnetic environment.

[0024] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A lightweight ultra-fine carbon fiber medical wire, characterized by: The invention comprises a central conductor (10), an insulating layer (20) covering the central conductor (10) from the inside to the outside, a carbon fiber shielding layer (30) and an inner coating layer (40), wherein the central conductor (10) is formed by twisting a plurality of carbon fiber conductors (11), and the surface of the carbon fiber conductor (11) is plated with a silver layer (12).

2. The lightweight ultra-fine carbon fiber medical wire according to claim 1, characterized in that: The carbon fiber conductor (11) has a diameter of 5-6 um.

3. The lightweight ultra-fine carbon fiber medical wire according to claim 2, characterized in that: The thickness of the silver layer (12) is 0.5-2 μm.

4. The lightweight ultra-fine carbon fiber medical wire according to claim 1, characterized in that: The central conductor (10) is formed by twisting at least seven carbon fiber conductors (11).

5. The lightweight ultra-fine carbon fiber medical wire according to claim 1, characterized in that: The carbon fiber shielding layer (30) is made by weaving or obliquely wrapping a plurality of carbon fiber conductors.

6. The lightweight ultra-fine carbon fiber medical wire according to claim 1, characterized in that: The insulating layer (20) and the inner cladding layer (40) are made of fluoroplastics.

7. The lightweight ultra-fine carbon fiber medical wire according to claim 6, characterized in that: The insulating layer (20) comprises an inner skin layer (21), a foaming layer (22) and an outer skin layer (23).

8. A medical cable signal core, characterized in that: The invention comprises the lightweight ultra-fine carbon fiber medical wire as described in any one of claims 1 to 7, wherein the carbon fiber medical wire serves as a basic structural unit of a signal cable core of a medical cable.

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