Superfine coaxial line

Abstract

The utility model relates to the technical field of coaxial lines, in particular to a superfine coaxial line, which is characterized in that the periphery of a central conductor is coated with a PP belting layer, a winding layer and a polyester belt layer at one time, and a self-adhesive layer is formed on the surface, facing the winding layer, of the polyester belt layer. The PP wrapping tape with a stable dielectric constant is wound on the central conductor, so that the PP wrapping tape layer is formed, and the existing fluoride is replaced to serve as an insulating layer structure. The winding layer plays a role in shielding signal interference, then the periphery of the winding layer is wrapped with a layer of polyester belt to form a polyester belt layer, a self-adhesive layer is formed on the surface of the polyester belt and is made of hot melt adhesive, the hot melt adhesive adheres to the winding layer and the polyester belt layer through heating, and the outer diameter can be reduced while the internal structure is fixed; and the PP wrapping tape layer and the polyester tape layer are used for replacing the existing fluoride to serve as the structure of the insulating layer, so that the fluoride is prevented from being used under the condition that the original performance is met, and the market demand is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coaxial cable, in particular to an ultra-fine coaxial cable. BACKGROUND

[0002] The existing coaxial cable includes a center conductor, an insulating layer and an outer sheath layer covering the conductor. The conventional ultra-fine coaxial cable has a small outer diameter requirement, and the thickness of the insulating layer and the outer sheath layer needs to be very small. Currently, only fluorinated material can be extruded to form the insulating layer and the outer sheath layer of the ultra-fine coaxial cable, and other extruded materials cannot meet the thickness requirement. However, in recent years, with the development of society, the environmental protection requirements for wire materials are becoming increasingly stringent. Currently, the European Union is further restricting the use of PFAS fluorinated materials in accordance with the REACH regulation. However, the ultra-fine coaxial cable generally uses PFA or FEP fluorinated material, which cannot meet the relevant requirements. Therefore, it is necessary to design an ultra-fine coaxial cable that meets the original performance requirements without using fluorinated material. SUMMARY

[0003] In order to solve the above technical problems, the present application provides an ultra-fine coaxial cable, which includes a center conductor, a PP tape layer covering the center conductor, a winding layer wound on the outer periphery of the PP tape layer, and a polyester tape layer wrapped on the outer periphery of the winding layer. The surface of the polyester tape layer towards the winding layer is formed with a self-adhesive layer.

[0004] Preferably, the thickness of the PP tape layer is 0.06-0.08mm.

[0005] Preferably, the thickness of the PP tape layer is 0.07mm.

[0006] Preferably, the winding layer is formed by interlaced winding of tinned alloy hard copper wire and copper foil tape.

[0007] As can be seen from the above, the present application can achieve the following beneficial effects: by wrapping the PP tape layer and the polyester tape layer on the outer periphery of the center conductor, and forming a self-adhesive layer on the surface of the polyester tape layer towards the winding layer. By using PP tape with stable dielectric constant to wrap the center conductor to form a PP tape layer, the existing fluorinated material is replaced as the structure of the insulating layer. The winding layer plays a role in shielding signal interference, and then a layer of polyester tape is wrapped on the outer periphery of the winding layer to form a polyester tape layer. The surface of the polyester tape is formed with a self-adhesive layer, which is a hot melt adhesive. By heating, the hot melt adhesive adheres to the winding layer, and the polyester tape layer fixes the internal structure while reducing the outer diameter and meeting the voltage level requirements, thereby obtaining a stable coaxial cable structure. By replacing the existing fluorinated material with the PP tape layer 20 and the polyester tape layer 40 as the structure of the insulating layer, the use of fluorinated material is avoided while meeting the original performance requirements, thereby meeting the market demand. BRIEF DESCRIPTION OF DRAWINGS

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the ultra-fine coaxial cable structure according to an embodiment of this application. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0011] Example

[0012] Conventional ultra-fine coaxial cables require a small outer diameter, necessitating a very thin insulation layer on the outer layer of the conductor. Currently, only fluorinated materials can be extruded to create the insulation layer for ultra-fine coaxial cables; other extruded materials cannot meet the thickness requirements. With increasingly stringent environmental regulations for cables, the EU is further restricting the use of PFAS fluorinated materials under the REACH regulation.

[0013] To address the aforementioned technical problems, this embodiment provides an extremely fine coaxial cable, such as... Figure 1 As shown, the coaxial cable includes a center conductor 10, a PP wrapping layer 20 covering the center conductor 10, a winding layer 30 wrapped around the outer periphery of the PP wrapping layer 20, and a polyester tape layer 40 wrapped around the outer periphery of the winding layer 30. A self-adhesive layer is formed on the surface of the polyester tape layer 40 facing the winding layer 30. By using a PP wrapping layer with a stable dielectric constant to wrap around the center conductor 10, the PP wrapping layer 20 is formed. The winding layer 30 serves to shield against signal interference. Then, a polyester tape layer 40 is formed by wrapping the outer periphery of the winding layer 30, and a self-adhesive layer is formed on the surface of the polyester tape. The self-adhesive layer is a hot melt adhesive, which is heated to bond the winding layer 30. The polyester tape layer 40 fixes the internal structure while reducing the outer diameter and meeting voltage level requirements, thus obtaining a structurally stable coaxial cable. By using the PP wrapping layer 20 and the polyester tape layer 40 to replace the existing fluoride insulation layer, the use of fluoride is avoided while maintaining the original performance, meeting market demands.

[0014] Specifically, the thickness of the PP wrapping layer 20 is 0.06-0.08mm, and the thickness of the PP wrapping layer 20 is 0.07mm. Moreover, the outer covering is changed from conventional fluorine to self-adhesive polyester tape, which meets the voltage level requirements and can reduce the outer diameter while fixing the structure, thereby realizing an extremely thin coaxial cable.

[0015] Further, the winding layer 30 is formed by interlaced winding of tinned alloy hard copper wire and copper foil tape to reduce the influence of external electromagnetic interference on the coaxial cable, and to play a shielding role. At the same time, the interlaced winding of tinned alloy hard copper wire and copper foil tape ensures the tensile strength and pressure resistance of the cable, and improves the strength of the cable.

[0016] In summary, the scheme of the present application wraps the PP wrapping layer and the polyester tape layer around the outer periphery of the center conductor, and the surface of the polyester tape layer towards the winding layer is formed with a self-adhesive layer. The PP wrapping layer is formed by wrapping the PP wrapping layer with stable dielectric constant around the center conductor, thereby replacing the existing fluorine as the structure of the insulating layer. The winding layer plays a role in shielding signal interference, and then a layer of polyester tape is wrapped around the outer periphery of the winding layer to form a polyester tape layer, and the surface of the polyester tape is formed with a self-adhesive layer. The self-adhesive layer is a hot melt adhesive, which is heated to adhere to the winding layer. The polyester tape layer realizes the fixation of the internal structure while reducing the outer diameter, and meets the voltage level requirements, thereby obtaining a coaxial cable with stable structure. In the case of meeting the original performance, the use of fluorine is avoided, and the market demand is met.

[0017] The above-described embodiments do not constitute a limitation on the protection scope of the technical solution. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above-described embodiments shall be included in the protection scope of the technical solution.

Claims

1. An ultra-fine coaxial cable, characterized by: The center conductor (10), the PP tape layer (20) covering the center conductor (10), the winding layer (30) winding on the outer periphery of the PP tape layer (20), and the polyester tape layer (40) around the outer periphery of the winding layer (30) are provided, and a self-adhesive layer is formed on the surface of the winding layer (30) towards the polyester tape layer (40).

2. Very fine coaxial line according to claim 1, characterized in that: The thickness of the PP tape layer (20) is 0.06-0.08mm.

3. Very fine coaxial line according to claim 2, characterized in that: The thickness of the PP tape layer (20) is 0.07mm.

4. Very fine coaxial line according to claim 1, characterized in that: The winding layer (30) is formed by interlaced winding of plated tin alloy hard copper wire and copper foil tape.

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