CN110993197A - Coaxial cable and method for manufacturing coaxial cable - Google Patents
Coaxial cable and method for manufacturing coaxial cable Download PDFInfo
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- CN110993197A CN110993197A CN201911133522.8A CN201911133522A CN110993197A CN 110993197 A CN110993197 A CN 110993197A CN 201911133522 A CN201911133522 A CN 201911133522A CN 110993197 A CN110993197 A CN 110993197A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/225—Screening coaxial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
Abstract
The invention provides a coaxial cable and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: an inner layer and an insulating layer which cover the inner conductor are sequentially formed on the outer side of the inner conductor, and the inner conductor and the insulating layer are bonded through the inner layer, wherein the insulating layer is formed on the outer side of the inner layer in a high-pressure nitrogen injection foaming extrusion mode; forming an aluminum foil structure on the outer side of the insulating layer in a mode of longitudinally wrapping and weaving the aluminum foil, and bonding the aluminum foil structure and the insulating layer by hot melt adhesive; the aluminum foil structure outer layer is sequentially provided with a shielding layer, a bonding layer and a sheath, hot melt adhesive is arranged between the bonding layer and the sheath, and the bonding layer and the sheath are bonded by heating the sheath. The invention improves the bonding effectiveness of the inner layer and the insulating layer and the oxidation resistance and corrosion resistance at high temperature through the inner layer proportion, improves the transmission performance of the product at high temperature and increases the high-temperature aging resistance of the insulation through the optimization of the insulation formula, and improves the shielding effectiveness of the coaxial cable when the coaxial cable is bent by utilizing the aluminum-based self-adhesive aluminum foil in the aluminum foil structure.
Description
Technical Field
The invention relates to the field of cable manufacturing, in particular to a coaxial cable and a manufacturing method of the coaxial cable.
Background
With the development of society, communication becomes an essential part of people's daily life, and coaxial cable is regarded as a transmission medium of communication signals, and the quality and the security of the coaxial cable are more and more emphasized. The common coaxial cable products in the market at present mainly adopt a corrugated copper pipe outer conductor, and are widely applied to radio frequency connection feeders in electronic equipment such as communication, radar, satellite and the like.
However, the coaxial cable of the existing product has the disadvantages of narrow range of use temperature, poor heat resistance, failure to effectively shield external interference when the temperature changes greatly and bends, and poor communication performance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a coaxial cable and a manufacturing method of the coaxial cable, wherein an insulating layer is arranged between the insulating layer and an inner conductor, the bonding effectiveness and the oxidation resistance and the corrosion resistance at high temperature of the inner layer and the insulating layer are improved through the inner layer proportion, the transmission performance of a product at high temperature is improved and the high-temperature aging resistance of insulation is increased through the optimization of an insulation formula, the shielding effectiveness of the coaxial cable during bending is improved by utilizing an aluminum-based self-adhesive aluminum foil in an aluminum foil structure, and the communication performance of the coaxial cable is enhanced.
In order to solve the above problems, the present invention adopts a technical solution as follows: a method of making a coaxial cable, the method comprising:
s101: the inner conductor and the insulating layer are sequentially formed on the outer side of the inner conductor, the inner conductor and the insulating layer are bonded through the inner layer, the inner layer comprises 100 parts of low-density polyethylene, 3-4 parts of a bonding agent and 0.4-0.6 part of a corrosion inhibitor, the inner layer is covered on the inner conductor in an inner layer extrusion mode, the insulating layer is formed on the outer side of the inner layer in a high-pressure nitrogen injection foaming extrusion mode, and the insulating layer comprises 70 parts of high-density polyethylene, 30 parts of low-density polyethylene, 0.3 part of a heat stabilizer and 0.7 part of a nucleating agent;
s102: forming an aluminum foil structure on the outer side of the insulating layer in a mode of longitudinally wrapping and weaving aluminum foils, wherein the aluminum foil structure comprises a four-aluminum-based self-adhesive aluminum foil, a hot melt adhesive is arranged between the aluminum foil structure and the insulating layer, and the aluminum foil structure and the insulating layer are bonded through the hot melt adhesive;
s103: the aluminum foil structure outer layer sequentially forms a shielding layer, a bonding layer and a sheath, a hot melt adhesive is arranged between the bonding layer and the sheath, and the bonding layer and the sheath are bonded by heating the sheath.
Further, the inner conductor is copper and has a diameter of 1.02 mm.
Further, the insulating layer is formed on the outer side of the inner layer in a foaming extrusion mode.
Further, the step of covering the inner conductor by means of inner layer extrusion specifically comprises:
and after the inner layer is proportioned, the particles are dispersed in a stirring and melting mode, and the particles are extruded on the inner conductor through an inner layer extruder.
And further, a small-taper weaving die is adopted for weaving to form an aluminum foil structure.
Furthermore, the shielding layer is composed of 60% -95% of aluminum magnesium alloy wires with weaving density.
Further, the aluminum foil structure comprises a first aluminum-based self-adhesive aluminum foil, a first PET layer, a second aluminum-based self-adhesive aluminum foil, a second PET layer, a third aluminum-based self-adhesive aluminum foil and a fourth aluminum-based self-adhesive aluminum foil from inside to outside in sequence, wherein the thickness of the first aluminum-based self-adhesive aluminum foil, the second aluminum-based self-adhesive aluminum foil and the third aluminum-based self-adhesive aluminum foil is smaller than that of the fourth aluminum-based self-adhesive aluminum foil.
Furthermore, the bonding protective layer is a double-sided bonding protective aluminum foil.
Based on the same inventive concept, the invention also provides a coaxial cable, which is formed by the manufacturing method of the coaxial cable.
Compared with the prior art, the invention has the beneficial effects that: the insulating layer is arranged between the insulating layer and the inner conductor, the bonding effectiveness of the inner layer and the insulating layer and the oxidation resistance and corrosion resistance at high temperature are improved through the inner layer proportion, the transmission performance of a product at high temperature is improved and the high-temperature aging resistance of insulation is improved through the optimization of the insulating formula, the shielding effectiveness of the coaxial cable during bending is improved by utilizing the aluminum-based self-adhesive aluminum foil in the aluminum foil structure, and the communication performance of the coaxial cable is enhanced.
Drawings
FIG. 1 is a flow chart of a method of making a coaxial cable according to one embodiment of the present invention;
fig. 2 is a detailed structural diagram of an embodiment of a coaxial cable in the manufacturing method of the coaxial cable according to the present invention;
FIG. 3 is a flow chart of one embodiment of a method for making a coaxial cable of the present invention;
fig. 4 is a block diagram of an embodiment of a coaxial cable of the present invention.
In the figure: 1. an inner conductor; 2. an inner layer; 3. an insulating layer; 4. an aluminum foil structure; 5. a shielding layer; 6. bonding a protective layer; 7. a sheath.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Referring to fig. 1-2, fig. 1 is a flow chart illustrating a method for manufacturing a coaxial cable according to an embodiment of the present invention; fig. 2 is a detailed structural diagram of an embodiment of a coaxial cable in the manufacturing method of the coaxial cable of the present invention. The method for making the coaxial cable of the present invention will be described in detail with reference to the accompanying fig. 1-2.
S1: the inner layer and the insulating layer which cover the inner conductor are sequentially formed on the outer side of the inner conductor, the inner conductor and the insulating layer are bonded through the inner layer, the inner layer comprises 100 parts of low-density polyethylene, 3-4 parts of binder and 0.4-0.6 part of corrosion inhibitor, the inner layer covers the inner conductor in an extrusion mode, the insulating layer is formed on the outer side of the inner layer in a high-pressure nitrogen injection foaming extrusion mode, and the insulating layer comprises 70 parts of high-density polyethylene, 30 parts of low-density polyethylene, 0.3 part of heat stabilizer and 0.7 part of nucleating agent.
In the present embodiment, the process route for forming the inner layer 2 and the insulating layer 3 covering the inner conductor 1 is conductor constant tension paying out → conductor straightening → conductor sizing and polishing → conductor cleaning → conductor preheating → inner layer extrusion → foaming extrusion → cooling molding → take-up. The conductor is the inner conductor 1. The insulating layer 3 and the inner conductor 1 are sufficiently bonded together by the inner layer 2 so that the insulating layer 3 is not easily separated. And the corrosion inhibitor added in the proportion of the inner layer 2 is utilized to effectively prevent the oxidation and corrosion of the inner layer 2. During constant tension paying-off, the tension applied to the inner conductor 1 is maintained constant to promote the inner layer 2 to be uniformly coated on the inner conductor 1.
In this embodiment, the inner layer 2 is made of low density polyethylene having a melt index of 7 ± 0.5g/10min, which is made of 1C7A, and in other embodiments, other types or brands of low density polyethylene having the melt index may be used, which is not limited herein.
In this example, the binder type is Dow chemical (DOW)3004 and the corrosion inhibitor is benzotriazole. The low-density polyethylene, the binder and the corrosion inhibitor are mixed according to the weight ratio of 100: 3-4: 0.4-0.6. After the inner layer 2 is matched and finished, particles are supported through high-temperature melting and stirring, and the particles are extruded to the outer side of the inner conductor 1 through an inner layer extruder to form an inner layer 2 surrounding the inner conductor 1.
In a specific embodiment, the thickness of the inner layer 2 is 0.04 to 0.06 mm.
In this embodiment, the inner conductor 1 is copper and has a diameter of 1.02mm, and the insulating layer 3 is formed outside the inner layer 2 by foam extrusion.
The insulating layer 3 is formed on the outer side of the inner layer 2 in a foaming extrusion mode, the weight ratio of the insulating layer 3 is 70 parts of high-density polyethylene, 30 parts of low-density polyethylene, 0.3 part of heat stabilizer and 0.7 part of nucleating agent, materials with preset weight are used as one part, and the parts of the materials are multiples of the preset weight when the materials are matched. Therefore, when the insulating layer is formed, the weight ratio of the high-density polyethylene, the low-density polyethylene, the heat stabilizer and the nucleating agent is 70:30:0.3: 0.7.
In this example, the high density polyethylene has a melt index of 8 + -0.5 g/10min, a relative dielectric constant of 2.27 or less, and a dielectric loss tangent of 0.00007 or less, wherein the material selected includes DGDA-6944 NT.
In this example, the low density polyethylene has a melt index of 1.8. + -. 0.2g/10min, a relative dielectric constant of 2.34 or less, and a dielectric loss tangent of 0.00007 or less. Among the materials that may be selected are low density polyethylene available under the Dow chemical model DGDA-1253 NT.
When the above materials are mixed to form the insulating layer 3, it is necessary to inject a foaming gas, which is a high-purity nitrogen gas having a purity of 99.999% or more, into the mixed material of the high-density polyethylene, the low-density polyethylene, the heat stabilizer, and the nucleating agent by high-pressure nitrogen injection.
In this example, the thermal stabilizer is N-phenyl-N' -cyclohexyl-p-phenylenediamine, the nucleating agent is DOW DFNA-0078NT of DOW chemical, and when nitrogen is injected into the molten polyethylene, the nucleating agent provides a core of gas-generated bubbles, and the bubbles are of a moderate size and are uniformly dispersed, thereby improving the foaming effect.
S2: the aluminum foil structure is formed in the outer side of the insulating layer in a mode of longitudinally wrapping and weaving the aluminum foil, the aluminum foil structure comprises four layers of aluminum-based self-adhesive aluminum foils, hot melt adhesive is arranged between the aluminum foil structure and the insulating layer, and the aluminum foil structure and the insulating layer are bonded through the hot melt adhesive.
In this embodiment, the process for forming the aluminum foil structure 4 includes: constant tension paying-off → aluminum foil longitudinal wrapping → weaving → constant tension taking-up.
To further improve the signal shielding effectiveness of the coaxial cable when bent, the aluminum foil structure 4 may comprise four layers of aluminum-based self-adhesive aluminum foil.
When the intermediate frequency preheating is carried out on the insulating layer 3, EMAA glue (hot melt adhesive) is coated on the insulating layer 3, and the insulating layer 3 and the aluminum foil structure 4 are fully bonded together through the EMAA glue, so that the minimum electromagnetic signal leakage during the coaxial bending is ensured.
In this embodiment, the aluminum foil structure 4 sequentially includes, from inside to outside, a first aluminum-based self-adhesive aluminum foil, a first PET layer, a second aluminum-based self-adhesive aluminum foil, a second PET layer, a third aluminum-based self-adhesive aluminum foil, and a fourth aluminum-based self-adhesive aluminum foil, and the first aluminum-based self-adhesive aluminum foil, the second aluminum-based self-adhesive aluminum foil, and the third aluminum-based self-adhesive aluminum foil have the same thickness, and the thickness is smaller than that of the fourth aluminum-based self-adhesive aluminum foil.
In a specific embodiment, the thickness of the EMAA glue is 0.020-0.025 mm; the thickness of the first aluminum-based self-adhesive aluminum foil, the second aluminum-based self-adhesive aluminum foil and the third aluminum-based self-adhesive aluminum foil is 0.007 +/-0.001 mm; the thickness of the fourth aluminum-based self-adhesive aluminum foil is as follows: 0.013 +/-0.001 mm, and the thickness of the first PET layer and the second PET layer is 0.010-0.012 mm.
In the present embodiment, in order to make the aluminum foil coating tight and flat, the aluminum foil structure 4 is formed by using a small-taper braiding mold when forming the aluminum foil structure 4.
S3: the aluminum foil structure outer layer is sequentially provided with a shielding layer, a bonding layer and a sheath, hot melt adhesive is arranged between the bonding layer and the sheath, and the bonding layer and the sheath are bonded by heating the sheath.
In the present embodiment, the shielding layer 5 is made of an aluminum magnesium alloy wire having a braiding density of 60% to 95%, and the shielding layer 5 is also used as an outer conductor of a coaxial cable.
In a preferred embodiment the shield 5 of the coaxial cable consists of 90% braid density aluminium magnesium alloy wires.
In this embodiment, the protection layer 6 is a double-sided protection aluminum foil.
In this embodiment, the process for forming the adhesive layer 6 and the sheath 7 includes: constant tension paying-off → medium frequency preheating → aluminum foil longitudinal wrapping → sheath 7 extrusion → cooling → constant tension taking-up. Wherein, when the medium-frequency preheating is carried out, EMM glue is coated on the outer side of the double-sided adhesive protective aluminum foil so as to ensure that the adhesive protective layer 6 is fully adhered with the sheath 7. In the aluminum foil longitudinal wrapping process, EMAA glue on the double-sided adhesive protective aluminum foil is bonded with the sheath 7 at the extruder head of the sheath 7 by depending on the heating temperature of the sheath 7, so that the electromagnetic signal leakage generated when the coaxial cable is bent is further reduced.
The coaxial cable adopts the formula and the processing technology of the novel insulating layer 3 and the inner layer 2, and adopts the design of a multilayer composite outer shielding structure. The product ensures a soft structure and improves high-temperature phase stability and mechanical phase stability.
In a specific embodiment, the diameter of the inner conductor 1 in the coaxial cable is 1.02mm, the outer diameter of the insulating layer 3 is 4.57mm, the outer diameter of the aluminum foil structure 4 is 18mm, the shielding layer 5 is 90% weaving density aluminum-magnesium alloy wire with the thickness of 0.16mm, the adhesive protection layer 6 is double-sided adhesive protection aluminum foil with the outer diameter of 22mm, and the thickness of the sheath 7 is 7.2 mm.
In this embodiment, the sheath 7 may be any one of a polyethylene sheath, a low smoke zero halogen sheath, and other elastomer sheaths.
Has the advantages that: the insulating layer is arranged between the insulating layer and the inner conductor, the bonding effectiveness of the inner layer and the insulating layer and the oxidation resistance and corrosion resistance at high temperature are improved through the inner layer proportion, the transmission performance of a product at high temperature is improved and the high-temperature aging resistance of insulation is improved through the optimization of the insulating formula, the shielding effectiveness of the coaxial cable during bending is improved by utilizing the aluminum-based self-adhesive aluminum foil in the aluminum foil structure, and the communication performance of the coaxial cable is enhanced.
Based on the same inventive concept, the present application further provides a coaxial cable, please refer to fig. 3 and fig. 4, fig. 3 is a flowchart of an embodiment of a method for manufacturing a coaxial cable in the coaxial cable of the present invention, fig. 4 is a structural diagram of an embodiment of the coaxial cable of the present invention, and the coaxial cable of the present invention is described with reference to fig. 3 and fig. 4.
In this embodiment, the coaxial cable includes, in order from inside to outside, an inner conductor, an inner layer, an insulating layer, an aluminum foil structure, a shielding layer, an adhesive layer, and a sheath. The coaxial cable is formed by the following manufacturing method of the coaxial cable:
s201: the inner layer and the insulating layer which cover the inner conductor are sequentially formed on the outer side of the inner conductor, the inner conductor and the insulating layer are bonded through the inner layer, the inner layer comprises 100 parts of low-density polyethylene, 3-4 parts of binder and 0.4-0.6 part of corrosion inhibitor, the inner layer covers the inner conductor in an extrusion mode, the insulating layer is formed on the outer side of the inner layer in a high-pressure nitrogen injection foaming extrusion mode, and the insulating layer comprises 70 parts of high-density polyethylene, 30 parts of low-density polyethylene, 0.3 part of heat stabilizer and 0.7 part of nucleating agent.
In the embodiment, the process route for forming the inner layer and the insulating layer covering the inner conductor is conductor constant tension paying off → conductor straightening → conductor sizing and polishing → conductor cleaning → conductor preheating → inner layer extrusion → foaming extrusion → cooling molding → wire winding. The conductor is an inner conductor. The insulating layer and the inner conductor are sufficiently bonded together by the inner layer, so that the insulating layer is not easily separated. And the corrosion inhibitor added in the proportion of the inner layer is utilized to effectively prevent the inner layer from being oxidized and corroded. When the constant tension is released, the tension applied to the inner conductor is kept constant so as to promote the inner layer to be uniformly coated on the inner conductor.
In this embodiment, the inner layer is made of low density polyethylene having a melt index of 7 ± 0.5g/10min, which is 1C7A, and in other embodiments, other types or brands of low density polyethylene having the melt index may be used, which is not limited herein.
In this example, the binder type is Dow chemical (DOW)3004 and the corrosion inhibitor is benzotriazole. The weight ratio of the low-density polyethylene, the binder and the corrosion inhibitor is determined. After the inner layer is matched, the particles are uniformly stirred through high-temperature melting, and then are supported, and the particles are extruded to the outer side of the inner conductor through an inner layer extruder to form an inner layer surrounding the inner conductor.
In a specific embodiment, the thickness of the inner layer is 0.04-0.06 mm.
In this embodiment, the inner conductor is copper and has a diameter of 1.02mm, and the insulating layer is formed outside the inner layer by foam extrusion.
The insulating layer is formed on the outer side of the inner layer in a foaming extrusion mode, and the weight ratio of the insulating layer is 70 parts of high-density polyethylene, 30 parts of low-density polyethylene, 0.3 part of heat stabilizer and 0.7 part of nucleating agent.
In this example, the high density polyethylene has a melt index of 8 + -0.5 g/10min, a relative dielectric constant of 2.27 or less, and a dielectric loss tangent of 0.00007 or less, wherein the material selected includes DGDA-6944 NT.
In this example, the low density polyethylene has a melt index of 1.8. + -. 0.2g/10min, a relative dielectric constant of 2.34 or less, and a dielectric loss tangent of 0.00007 or less. Among the materials that may be selected are low density polyethylene available under the Dow chemical model DGDA-1253 NT.
When the materials are mixed to form the insulating layer, foaming gas is needed to be injected, the foaming gas is high-purity nitrogen with the purity of more than 99.999 percent, and the high-density polyethylene, the low-density polyethylene, the heat stabilizer and the nucleating agent are injected into the mixed material in a high-pressure nitrogen injection mode.
In this example, the thermal stabilizer is N-phenyl-N' -cyclohexyl-p-phenylenediamine, the nucleating agent is DOW DFNA-0078NT of DOW chemical, and when nitrogen is injected into the molten polyethylene, the nucleating agent provides a core of gas-generated bubbles, and the bubbles are of a moderate size and are uniformly dispersed, thereby improving the foaming effect.
S202: the aluminum foil structure is formed in the outer side of the insulating layer in a mode of longitudinally wrapping and weaving the aluminum foil, the aluminum foil structure comprises four layers of aluminum-based self-adhesive aluminum foils, hot melt adhesive is arranged between the aluminum foil structure and the insulating layer, and the aluminum foil structure and the insulating layer are bonded through the hot melt adhesive.
In this embodiment, the process circuit for forming the aluminum foil structure is: constant tension paying-off → aluminum foil longitudinal wrapping → weaving → constant tension taking-up.
To further improve the signal shielding effectiveness of the coaxial cable when bent, the aluminum foil structure may comprise a tetra aluminum based self-adhesive aluminum foil.
When the intermediate frequency preheating is carried out on the insulating layer, EMAA glue (hot melt adhesive) is coated on the insulating layer, and the insulating layer and the aluminum foil structure are fully bonded together through the EMAA glue, so that the minimum electromagnetic signal leakage during the coaxial bending is ensured.
In this embodiment, the aluminum foil structure includes first aluminium base self-adhesion aluminum foil, first PET layer, second aluminium base self-adhesion aluminum foil, second PET layer, third aluminium base self-adhesion aluminum foil, fourth aluminium base self-adhesion aluminum foil from inside to outside in proper order, and first aluminium base self-adhesion aluminum foil, second aluminium base self-adhesion aluminum foil, third aluminium base self-adhesion aluminum foil's thickness is the same, and this thickness is less than the thickness of fourth aluminium base self-adhesion aluminum foil.
In a specific embodiment, the thickness of the EMAA glue is 0.020-0.025 mm; the thickness of the first aluminum-based self-adhesive aluminum foil, the second aluminum-based self-adhesive aluminum foil and the third aluminum-based self-adhesive aluminum foil is 0.007 +/-0.001 mm; the thickness of the fourth aluminum-based self-adhesive aluminum foil is as follows: 0.013 +/-0.001 mm, and the thickness of the first PET layer and the second PET layer is 0.010-0.012 mm.
In this embodiment, in order to make the aluminum foil coating tight and flat, a small-taper braiding mold is used to form the aluminum foil structure.
S203: the aluminum foil structure outer layer is sequentially provided with a shielding layer, a bonding layer and a sheath, hot melt adhesive is arranged between the bonding layer and the sheath, and the bonding layer and the sheath are bonded by heating the sheath.
In this embodiment, the shielding layer is made of an aluminum-magnesium alloy wire with a braiding density of 60% to 95%, and the shielding layer is also used as an outer conductor of the coaxial cable.
In a preferred embodiment, the shield of the coaxial cable is comprised of 90% braid density aluminum magnesium alloy wire.
In this embodiment, the protection layer is a double-sided protection aluminum foil.
In this embodiment, the process for forming the adhesive layer and the sheath includes: constant tension paying-off → medium frequency preheating → aluminum foil longitudinal wrapping → sheath extrusion → cooling → constant tension taking-up. And during intermediate-frequency preheating, EMM glue is coated on the outer side of the double-sided adhesive protective aluminum foil to enable the adhesive protective layer to be fully adhered to the protective sleeve. When the aluminum foil is longitudinally wrapped, EMAA glue adhered to the aluminum foil on the two sides is adhered to the sheath at the sheath extruder head by the heating temperature of the sheath, so that the leakage of electromagnetic signals generated when the coaxial cable is bent is further reduced.
The coaxial cable adopts a novel insulating layer, an inner layer formula and a processing technology, and adopts a multilayer composite outer shielding structure design. The product ensures a soft structure and improves high-temperature phase stability and mechanical phase stability.
In a specific embodiment, the diameter of the inner conductor in the coaxial cable is 1.02mm, the outer diameter of the insulating layer is 4.57mm, the outer diameter of the aluminum foil structure is 18mm, the shielding layer is 90% weaving density aluminum-magnesium alloy wire and is 0.16mm in thickness, the adhesive layer is double-sided adhesive protection aluminum foil, the outer diameter of the adhesive protection layer is 22mm, and the thickness of the sheath is 7.2 mm.
In this embodiment, the jacket may be any one of a polyethylene jacket, a low smoke zero halogen jacket, and other elastomer jackets.
Has the advantages that: the insulating layer is arranged between the insulating layer and the inner conductor, the bonding effectiveness of the inner layer and the insulating layer and the oxidation resistance and corrosion resistance at high temperature are improved through the inner layer proportion, the transmission performance of a product at high temperature is improved and the high-temperature aging resistance of insulation is improved through the optimization of the insulating formula, the shielding effectiveness of the coaxial cable during bending is improved by utilizing the aluminum-based self-adhesive aluminum foil in the aluminum foil structure, and the communication performance of the coaxial cable is enhanced.
In the embodiments provided in the present invention, it should be understood that the disclosed devices, modules and units may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the modules or partitions may be merely logical partitions, and may be implemented in other ways, e.g., multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, devices or indirect coupling or communication connection, and may be in an electrical, mechanical or other form.
The components described as separate parts may or may not be physically separate, and the components shown may or may not be physically separate, may be located in one place, or may be distributed in a plurality of places. Some or all of them can be selected according to actual needs to achieve the purpose of the embodiment.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. A method of making a coaxial cable, the method comprising:
s101: the inner conductor and the insulating layer are sequentially formed on the outer side of the inner conductor, the inner conductor and the insulating layer are bonded through the inner layer, the inner layer comprises 100 parts of low-density polyethylene, 3-4 parts of a bonding agent and 0.4-0.6 part of a corrosion inhibitor, the inner layer is covered on the inner conductor in an inner layer extrusion mode, the insulating layer is formed on the outer side of the inner layer in a high-pressure nitrogen injection foaming extrusion mode, and the insulating layer comprises 70 parts of high-density polyethylene, 30 parts of low-density polyethylene, 0.3 part of a heat stabilizer and 0.7 part of a nucleating agent;
s102: forming an aluminum foil structure on the outer side of the insulating layer in a mode of longitudinally wrapping and weaving aluminum foils, wherein the aluminum foil structure comprises four layers of aluminum-based self-adhesive aluminum foils, a hot melt adhesive is arranged between the aluminum foil structure and the insulating layer, and the aluminum foil structure and the insulating layer are bonded through the hot melt adhesive;
s103: the aluminum foil structure outer layer sequentially forms a shielding layer, a bonding layer and a sheath, a hot melt adhesive is arranged between the bonding layer and the sheath, and the bonding layer and the sheath are bonded by heating the sheath.
2. The method of claim 1 wherein said inner conductor is copper and has a diameter of 1.02 mm.
3. The method of claim 1, wherein the insulating layer is formed outside the inner layer by foam extrusion.
4. The method of claim 1, wherein said step of coating said inner conductor by extrusion of said inner layer comprises:
and after the inner layer is proportioned, the particles are dispersed in a stirring and melting mode, and the particles are extruded on the inner conductor through an inner layer extruder.
5. The method of claim 1 wherein the aluminum foil structure is formed by braiding with a braiding mold having a small taper.
6. The method of claim 1, wherein the shield layer is comprised of 60% -95% braided density aluminum magnesium alloy wire.
7. The method for manufacturing a coaxial cable according to claim 1, wherein the aluminum foil structure comprises, in order from inside to outside, a first aluminum-based self-adhesive aluminum foil, a first PET layer, a second aluminum-based self-adhesive aluminum foil, a second PET layer, a third aluminum-based self-adhesive aluminum foil, and a fourth aluminum-based self-adhesive aluminum foil, and the thicknesses of the first aluminum-based self-adhesive aluminum foil, the second aluminum-based self-adhesive aluminum foil, and the third aluminum-based self-adhesive aluminum foil are all smaller than the thickness of the fourth aluminum-based self-adhesive aluminum foil.
8. The method of claim 1, wherein the protective layer is a double-sided protective aluminum foil.
9. A coaxial cable formed by the method of making a coaxial cable according to any one of claims 1-8.
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799040A (en) * | 2020-06-22 | 2020-10-20 | 临安迅驰电子有限公司 | Foaming process for insulating layer in coaxial cable |
| CN112002489A (en) * | 2020-08-13 | 2020-11-27 | 重庆知遨科技有限公司 | Corrosion-resistant coaxial cable and production method thereof |
| CN114496390A (en) * | 2022-03-31 | 2022-05-13 | 中天科技装备电缆有限公司 | Coaxial cable for locomotive and manufacturing method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202067587U (en) * | 2011-05-18 | 2011-12-07 | 浙江汉力电缆有限公司 | Saline-alkaline corrosion-resistant coaxial cable |
| CN202120673U (en) * | 2011-06-23 | 2012-01-18 | 浙江万马集团特种电子电缆有限公司 | Coaxial cable |
| CN102361147A (en) * | 2011-10-10 | 2012-02-22 | 中天日立射频电缆有限公司 | Flexible type radio-frequency coaxial cable of smooth aluminum tube external conductor and production method thereof |
| CN103198904A (en) * | 2013-03-26 | 2013-07-10 | 贝思特宽带通讯(烟台)有限公司 | Process for processing benzotriazole on inner conductor |
| CN103258595A (en) * | 2013-05-27 | 2013-08-21 | 浙江万马集团特种电子电缆有限公司 | Seawater-corrosion-resistant coaxial cable |
| US20130306351A1 (en) * | 2011-02-04 | 2013-11-21 | Ineos Manufacturing Belgium Nv | Insulated electric cable |
| CN203397764U (en) * | 2013-08-21 | 2014-01-15 | 浙江万马集团特种电子电缆有限公司 | External layer hot melt type aluminum foil for three-shielding coaxial cable |
| CN104821205A (en) * | 2015-04-29 | 2015-08-05 | 浙江天杰实业有限公司 | High-definition high-performance coaxial cable and preparation method thereof |
| CN205069217U (en) * | 2015-09-22 | 2016-03-02 | 浙江万马集团特种电子电缆有限公司 | Two type CATV coaxial cable that glue of high shielding of resistant whipping |
| CN105958168A (en) * | 2016-06-24 | 2016-09-21 | 安徽宜德电子有限公司 | High-low-temperature-resistant radio-frequency coaxial cable |
| CN207009146U (en) * | 2017-07-13 | 2018-02-13 | 浙江光大普特通讯科技股份有限公司 | Double coaxial-cable with shielding structure of cable self-supporting three |
| CN207134164U (en) * | 2017-07-13 | 2018-03-23 | 浙江光大普特通讯科技股份有限公司 | Shielding attenuation 150dB cable |
-
2019
- 2019-11-19 CN CN201911133522.8A patent/CN110993197A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130306351A1 (en) * | 2011-02-04 | 2013-11-21 | Ineos Manufacturing Belgium Nv | Insulated electric cable |
| CN202067587U (en) * | 2011-05-18 | 2011-12-07 | 浙江汉力电缆有限公司 | Saline-alkaline corrosion-resistant coaxial cable |
| CN202120673U (en) * | 2011-06-23 | 2012-01-18 | 浙江万马集团特种电子电缆有限公司 | Coaxial cable |
| CN102361147A (en) * | 2011-10-10 | 2012-02-22 | 中天日立射频电缆有限公司 | Flexible type radio-frequency coaxial cable of smooth aluminum tube external conductor and production method thereof |
| CN103198904A (en) * | 2013-03-26 | 2013-07-10 | 贝思特宽带通讯(烟台)有限公司 | Process for processing benzotriazole on inner conductor |
| CN103258595A (en) * | 2013-05-27 | 2013-08-21 | 浙江万马集团特种电子电缆有限公司 | Seawater-corrosion-resistant coaxial cable |
| CN203397764U (en) * | 2013-08-21 | 2014-01-15 | 浙江万马集团特种电子电缆有限公司 | External layer hot melt type aluminum foil for three-shielding coaxial cable |
| CN104821205A (en) * | 2015-04-29 | 2015-08-05 | 浙江天杰实业有限公司 | High-definition high-performance coaxial cable and preparation method thereof |
| CN205069217U (en) * | 2015-09-22 | 2016-03-02 | 浙江万马集团特种电子电缆有限公司 | Two type CATV coaxial cable that glue of high shielding of resistant whipping |
| CN105958168A (en) * | 2016-06-24 | 2016-09-21 | 安徽宜德电子有限公司 | High-low-temperature-resistant radio-frequency coaxial cable |
| CN207009146U (en) * | 2017-07-13 | 2018-02-13 | 浙江光大普特通讯科技股份有限公司 | Double coaxial-cable with shielding structure of cable self-supporting three |
| CN207134164U (en) * | 2017-07-13 | 2018-03-23 | 浙江光大普特通讯科技股份有限公司 | Shielding attenuation 150dB cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799040A (en) * | 2020-06-22 | 2020-10-20 | 临安迅驰电子有限公司 | Foaming process for insulating layer in coaxial cable |
| CN112002489A (en) * | 2020-08-13 | 2020-11-27 | 重庆知遨科技有限公司 | Corrosion-resistant coaxial cable and production method thereof |
| CN114496390A (en) * | 2022-03-31 | 2022-05-13 | 中天科技装备电缆有限公司 | Coaxial cable for locomotive and manufacturing method thereof |
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Application publication date: 20200410 |