CN110903570B - Noctilucent grounding wire and processing technology thereof - Google Patents
Noctilucent grounding wire and processing technology thereof Download PDFInfo
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- CN110903570B CN110903570B CN201911130717.7A CN201911130717A CN110903570B CN 110903570 B CN110903570 B CN 110903570B CN 201911130717 A CN201911130717 A CN 201911130717A CN 110903570 B CN110903570 B CN 110903570B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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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
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers 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
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
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- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to the technical field of grounding wires, in particular to a noctilucent grounding wire and a processing technology thereof, and the noctilucent grounding wire comprises a grounding wire body, wherein the grounding wire body comprises a copper core and an insulating sheath wrapping the copper core, the insulating sheath is wrapped by a fluorescent sheath, and the fluorescent sheath is prepared from the following raw materials in parts by weight: 80-110 parts of polyvinyl chloride resin, 3-8 parts of ethylene-vinyl acetate copolymer, 10-20 parts of fluorescent material, 5-13 parts of toughening agent, 0.5-2 parts of antioxidant and 1-3 parts of coupling agent; the weight percentage content of vinyl acetate in the ethylene-vinyl acetate copolymer is 30-35%; fluorescent substances are added into the insulating sheath as raw materials, and the fluorescent substances can be uniformly dispersed in the insulating sheath, so that the grounding wire can stably emit light, and the problem that the grounding wire is missed to be detached due to insufficient light is solved; the processed fluorescent sheath has the highest tensile strength of 38MPa and the highest elongation at break of 187%, and the tensile strength and the elongation at break of the fluorescent sheath are basically kept unchanged after aging, so that the fluorescent sheath has excellent aging resistance.
Description
Technical Field
The invention relates to the technical field of grounding wires, in particular to a noctilucent grounding wire and a processing technology thereof.
Background
The grounding wire is a wire directly connected with the earth and can also be called a safety return line, and the grounding wire directly transfers high voltage to the earth in danger to be a life wire.
The household electrical appliance equipment has a certain static electricity on the shell due to poor insulation performance or damp use environment, and an electric shock accident can happen in serious cases. In order to avoid accidents, a wire can be connected to the metal shell of the electric appliance, the other end of the wire is connected to the ground, and once the electric appliance leaks electricity, the grounding wire brings static electricity to the ground to be released.
In order to ensure the reliability of power utilization of users in normal life and production, the maintenance work of a plurality of lines or equipment is usually arranged to be carried out at night, and when operating personnel carry out power cut-off operation at night, the grounding wire cannot be quickly positioned when the grounding wire is assembled and disassembled due to insufficient light of the equipment area, so that the operation time is prolonged. Meanwhile, when the earth wire is installed, if the earth wire is handed over, people who are not the same group who installs or removes the earth wire are easy to have the danger of missing the earth wire.
In order to solve the problems, the patent application with the application publication number of CN 103310899a discloses a portable fluorescent short-circuit grounding wire, which comprises a copper core and an insulating sheath wrapping the copper core, wherein a transparent insulating sleeve is further sleeved outside the insulating sheath, and a gap between the insulating sheath and the transparent insulating sleeve is filled with a luminous substance. Through the noctilucent substance filled between the insulating sheath and the transparent insulating sleeve, the luminous light can be emitted at night without illumination of the lighting equipment, the night operation is convenient, and the missing rate is reduced. However, the noctilucent substance is filled in the gap between the insulating sheath and the transparent insulating sleeve, and no matter the noctilucent powder or the noctilucent strip is separated from the transparent insulating sleeve; in the using process, the noctilucent substance is easily extruded locally due to repeated bending of the grounding wire, and the problems of non-uniform dispersion such as agglomeration and the like of the noctilucent substance are easily caused, so that the luminous effect and the stability of the grounding wire are influenced.
Disclosure of Invention
The first purpose of the invention is to provide a noctilucent ground wire, wherein fluorescent substances are added into an insulating sheath as raw materials, and the fluorescent substances can be uniformly dispersed in the insulating sheath, so that the ground wire can stably emit light, and the problem that the ground wire is not detached due to insufficient light is solved.
The first purpose of the invention is realized by the following technical scheme:
the utility model provides a night light earth connection, includes the earth connection body, the earth connection body includes the insulating sheath of copper core and parcel copper core, the outer parcel of insulating sheath has fluorescence sheath, fluorescence sheath is formed by the raw materials preparation including following part by weight: 80-110 parts of polyvinyl chloride resin, 3-8 parts of ethylene-vinyl acetate copolymer, 10-20 parts of fluorescent material, 5-13 parts of toughening agent, 0.5-2 parts of antioxidant and 1-3 parts of coupling agent; the weight percentage content of the vinyl acetate in the ethylene-vinyl acetate copolymer is 30-35%.
By adopting the technical scheme, the fluorescent sheath is wrapped outside the grounding wire body, so that the grounding wire can emit light in a dark environment, and is convenient for workers to find. In the fluorescent sheath, ethylene-vinyl acetate copolymer (EVA) can be blended and modified with polyvinyl chloride resin, so that the compatibility of the polyvinyl chloride resin in the system to fluorescent materials is improved, and the dispersion uniformity of the fluorescent materials in the polyvinyl chloride resin is improved, so that the noctilucent grounding wire can emit light more stably. A large number of tests prove that when the weight percentage of the vinyl acetate in the ethylene-vinyl acetate copolymer is 30-35%, the compatibility between the ethylene-vinyl acetate copolymer and the polyvinyl chloride resin is optimal, and the blending modification effect is best, so that the dispersion uniformity of the fluorescent material is optimal.
Preferably, the fluorescent sheath is prepared from the following raw materials in parts by weight: 90-100 parts of polyvinyl chloride resin, 5-7 parts of ethylene-vinyl acetate copolymer, 13-17 parts of fluorescent material, 8-10 parts of toughening agent, 1-1.5 parts of antioxidant and 1.5-2.5 parts of coupling agent.
Preferably, the coupling agent is a silane coupling agent A-172.
By adopting the technical scheme, the silane coupling agent A-172 can hydrophobize the fluorescent material, further improve the compatibility of the fluorescent material and the polyvinyl chloride resin and enable the dispersibility of the fluorescent material to be better. Meanwhile, the silane coupling agent A-172 can provide cross-linking points between the ethylene-vinyl acetate copolymer and the polyvinyl chloride resin, so that the blending modification between the ethylene-vinyl acetate copolymer and the polyvinyl chloride resin is facilitated, and the dispersion uniformity of the fluorescent material in the polyvinyl chloride resin system is improved.
Preferably, the toughening agent is an ethylene-octene copolymer.
By adopting the technical scheme, the ethylene-octene copolymer (POE) has the advantages of good dispersibility, good self-adhesion and mutual adhesion, good toughness, high transparency, excellent forming capability and the like. In the invention, the POE can improve the transparency of the fluorescent sheath while toughening the PVC resin, so that the fluorescent material is easier to perform light exchange with the external environment, and the blooming effect is improved.
Preferably, the toughening agent comprises an ethylene-octene copolymer and an ethylene-butene copolymer, and the weight ratio of the ethylene-octene copolymer to the ethylene-butene copolymer is (3-6): 1.
by adopting the technical scheme, since the fluorescent material is the inorganic filling particles, the self weight of the whole ground wire can be relatively increased after the fluorescent material is added, and the light weight is not facilitated. The specific gravity of the ethylene-butylene copolymer (SEBS) is lighter than that of the ethylene-octene copolymer, the ethylene-octene copolymer is used as a main toughening agent, and a part of the ethylene-butylene copolymer is matched, so that the specific gravity of the toughening agent can be relatively reduced while the toughening performance of the toughening agent is ensured, and the problems are solved.
The second purpose of the invention is to provide a noctilucent grounding wire, which is characterized in that 3-10 parts by weight of hollow glass beads are added into the raw materials of the fluorescent sheath on the basis of the first purpose.
By adopting the technical scheme, the hollow glass beads are a micron-sized novel light material, have the characteristics of high compressive strength, high melting point, high resistivity, small thermal conductivity coefficient, small thermal shrinkage coefficient and the like, and are a recognized light heat-insulating material. The hollow glass beads are added, so that the integral dead weight of the grounding wire can be relatively reduced, and the light weight is realized; and secondly, the filling and heat insulation effects can be achieved on the basis of meeting the mechanical strength of the fluorescent sheath, and the heat resistance and aging resistance of the fluorescent sheath are improved.
Preferably, the fluorescent material has a particle size of 4 to 8 μm, and the hollow glass beads have a particle size of 2 to 4 μm.
By adopting the technical scheme, the hollow glass beads have a reinforcing effect for the fluorescent material, the fluorescent material is dispersed and filled in the organic resin, the hollow glass beads are used as micro fillers and supported and filled among particles of the fluorescent material, and the organic resin material is used as an adhesive to adhere the uniformly dispersed fluorescent material and the hollow glass beads together, so that the hollow glass beads limit the movement path of the fluorescent material, and the problem of nonuniform dispersion such as local agglomeration of the fluorescent material after long-term use is avoided.
The third purpose of the invention is to provide a processing technology of the noctilucent ground wire in the first purpose, which comprises the following processing steps:
preparing a fluorescent sheath material: mixing and banburying polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent for 10-20min to 150-170 ℃ to obtain a high-temperature material A; adding a fluorescent material into the high-temperature material A, and banburying for 20-35min to 160-180 ℃ to obtain a fluorescent sheath material for later use;
preparing a luminous grounding wire: and extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, and sequentially adjusting the tension and arranging wires to obtain the noctilucent ground wire.
By adopting the technical scheme, the raw materials of the fluorescent sheath are melted, blended and banburied, so that the ethylene-vinyl acetate copolymer is matched with other auxiliary agents to modify the polyvinyl chloride resin; and then adding the fluorescent material, dispersing the fluorescent material in the high-temperature material A, and banburying the materials together to form the fluorescent sheath material. The fluorescent material is used as the raw material of the fluorescent sheath, and the fluorescent material can be dispersed in the fluorescent sheath after processing and forming, so that agglomeration cannot occur, and the luminous effect is good.
The fourth purpose of the invention is to provide a processing technology of the noctilucent ground wire in the second purpose, which is characterized by comprising the following processing steps:
preparing a fluorescent sheath material: uniformly mixing polyvinyl chloride resin, an ethylene-vinyl acetate copolymer, a toughening agent, an antioxidant and a coupling agent, and extruding by using a double screw at the temperature of a neck mold of 150-180 ℃ to obtain a high-temperature material B; feeding the high-temperature material B into another double-screw extruder, adding hollow glass beads and a fluorescent material at the head of the extruder at the neck mold temperature of 160-;
preparing a luminous grounding wire: and extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, and sequentially adjusting the tension and arranging wires to obtain the noctilucent ground wire.
By adopting the technical scheme, the raw materials of the fluorescent sheath are melted, blended and banburied, so that the ethylene-vinyl acetate copolymer is matched with other auxiliary agents to modify the polyvinyl chloride resin, and the fluorescent material and the hollow glass beads are uniformly coated and dispersed; during molding, the hollow glass beads and the fluorescent material are added to the machine head, so that the hollow glass beads can keep the structural integrity, and the strength supporting and filling functions of the hollow glass beads can be exerted.
Preferably, the hollow glass beads and the fluorescent material are added from the head until the fluorescent sheath material is obtained by extrusion, and the time required by the method is 10-15 s.
By adopting the technical scheme, the extrusion time is short, the molding is rapid, and the structural integrity of the hollow glass beads is further ensured.
In conclusion, the invention has the following beneficial effects:
(1) the invention successfully adds the fluorescent material into the sheath of the connecting wire to obtain the fluorescent sheath, overcomes the instability of filling the fluorescent material between the transparent sheath and the insulating sheath in the traditional process, and has the advantages of good luminous effect and no agglomeration of luminous points;
(2) the hollow glass beads are added into the fluorescent sheath, so that the fluorescent materials are reinforced and filled, the fluorescent materials are dispersed in the fluorescent sheath more compactly and are not easy to agglomerate, and the luminous effect is improved;
(3) the hollow glass beads are added into the fluorescent sheath, so that the self weight of the fluorescent sheath is reduced and the light weight is realized under the condition of the sheath with the same volume;
(4) according to the noctilucent ground wire, the highest tensile strength of the fluorescent sheath is 38MPa, the highest elongation at break is 187%, the tensile strength and the elongation at break are basically unchanged after aging, and the noctilucent ground wire is excellent in aging resistance.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The copper core in the invention is 25mm2The bare copper flexible wire is made; the polyvinyl chloride resin is PVC S-700; the ethylene-vinyl acetate copolymer selects VE810, wherein the weight percentage content of vinyl acetate is 33%; the fluorescent material is inorganic fluorescent powder with the particle size of 4-8 mu m; the ethylene-octene copolymer is selected from Dow, POE 8200, and specific gravity of 0.893g/cm3(ii) a The ethylene-butylene copolymer is Dow, 7467, with specific gravity of 0.862g/cm3(ii) a The grain diameter of the hollow glass micro-beads is 2-4 μm; the coupling agent is silane coupling agent A-172; the antioxidant is 1010. The grounding wire body in the invention adopts 50mm in the prior art2And (5) specification.
Example 1
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: adding polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent into an internal mixer according to the addition amounts in the table 1, and mixing and banburying for 10min to 150 ℃ to obtain a high-temperature material A; adding a fluorescent material into the high-temperature material A, and banburying for 20min to 160 ℃ to obtain a fluorescent sheath material for later use;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Example 2
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: adding polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent into an internal mixer according to the addition amounts in the table 1, and mixing and banburying for 13min to 158 ℃ to obtain a high-temperature material A; adding a fluorescent material into the high-temperature material A, and banburying for 26min to 167 ℃ to obtain a fluorescent sheath material for later use;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Example 3
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: adding polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent into an internal mixer according to the addition amounts in the table 1, and mixing and banburying for 17min to 164 ℃ to obtain a high-temperature material A; adding a fluorescent material into the high-temperature material A, and banburying for 30min to 172 ℃ to obtain a fluorescent sheath material for later use;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Example 4
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: adding polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent into an internal mixer according to the addition amounts in the table 1, mixing and banburying for 20min to 170 ℃, and obtaining a high-temperature material A; adding a fluorescent material into the high-temperature material A, and banburying for 35min to 180 ℃ to obtain a fluorescent sheath material for later use;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Examples 5 to 17
The noctilucent grounding wires of examples 5-17 are different from those of example 3 in the content of each raw material of the fluorescent sheath, and are shown in Table 1.
TABLE 1 EXAMPLE 1 amount of each raw material added (unit/g) of the fluorescent sheath
Example 18
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: uniformly mixing polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent according to the addition amount in the table 2, adding the mixture into a double-screw extruder, controlling the temperature of a machine barrel to be 145 ℃ and the temperature of a neck mold to be 150 ℃ for extrusion, and obtaining a high-temperature material B;
feeding the high-temperature material B into another double-screw extruder, controlling the temperature of a machine barrel to be 167 ℃ and the temperature of a neck mold to be 160 ℃, adding the hollow glass beads and the fluorescent material added in the amount shown in the table 2 into a machine head, and extruding to obtain a fluorescent sheath material for later use; adding hollow glass beads and a fluorescent material from a machine head until the hollow glass beads and the fluorescent material are extruded to obtain a fluorescent sheath material, wherein the required time is 15 s;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Example 19
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: uniformly mixing polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent according to the addition amount in the table 2, adding the mixture into a double-screw extruder, controlling the temperature of a machine barrel to be 166 ℃ and the temperature of a neck mold to be 170 ℃ for extrusion, and obtaining a high-temperature material B;
feeding the high-temperature material B into another double-screw extruder, controlling the temperature of a machine barrel to be 175 ℃ and the temperature of a neck mold to be 165 ℃, adding the hollow glass beads and the fluorescent material added in the amount shown in the table 2 into a machine head, and extruding to obtain a fluorescent sheath material for later use; adding hollow glass beads and a fluorescent material from a machine head until the hollow glass beads and the fluorescent material are extruded to obtain a fluorescent sheath material, wherein the required time is 13 s;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Example 20
The utility model provides a night light earth connection, includes the earth connection body, and the earth connection body includes the insulating sheath of copper core and parcel copper core, and the outer parcel of insulating sheath has the fluorescence sheath, and this night light earth connection adopts following processing step processing to form:
preparing a fluorescent sheath material: uniformly mixing polyvinyl chloride resin, ethylene-vinyl acetate copolymer, toughening agent, antioxidant and coupling agent according to the addition amount in the table 2, adding the mixture into a double-screw extruder, controlling the temperature of a machine barrel to be 173 ℃ and the temperature of a neck mold to be 180 ℃ for extrusion, and obtaining a high-temperature material B;
feeding the high-temperature material B into another double-screw extruder, controlling the temperature of a machine barrel to be 175 ℃ and the temperature of a neck mold to be 170 ℃, adding the hollow glass beads and the fluorescent material added in the amount shown in the table 2 into a machine head, and extruding to obtain a fluorescent sheath material for later use; adding hollow glass beads and a fluorescent material from a machine head until the hollow glass beads and the fluorescent material are extruded to obtain a fluorescent sheath material, wherein the required time is 10 s;
preparing a luminous grounding wire: extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, spraying codes through a laser code spraying machine in sequence, adjusting the tension through a tension controller, and arranging wires through an automatic wire arranging machine to obtain the noctilucent ground wire.
Examples 21 to 24
The noctilucent grounding wires of examples 21-24 are different from those of example 19 in the content of each raw material of the fluorescent sheath, and are shown in Table 2.
TABLE 2 amount of each raw material added (unit/g) of the fluorescent sheaths in examples 18 to 24
Comparative example 1
Comparative example 1 is different from example 15 in that the coupling agent ML-140 is used as the coupling agent, and the rest is the same as example 15.
Comparative example 2
Comparative example 2 is different from example 23 in that the ethylene-vinyl acetate copolymer has a vinyl acetate content of 22% by weight, and the rest is the same as example 23.
Comparative example 3
Comparative example 3 is different from example 23 in that the fluorescent material has a particle size of 2 to 4 μm and the hollow glass microspheres have a particle size of 4 to 8 μm, and the rest is the same as example 23.
Comparative example 4
Comparative example 4 is different from example 23 in that the amount of hollow glass microspheres added was 2g, and the rest was the same as example 23.
Comparative example 5
Comparative example 5 is different from example 23 in that the amount of hollow glass microspheres added was 13g, and the rest was the same as example 23.
Comparative example 6
The difference between the comparative example 6 and the example 23 is that when the fluorescent sheath material is prepared, the polyvinyl chloride resin, the ethylene-vinyl acetate copolymer, the toughening agent, the antioxidant, the coupling agent, the hollow glass beads and the fluorescent material are uniformly mixed according to the addition amounts in the table 2, and the mixture is added into a double-screw extruder, and the barrel temperature is controlled to be 166 ℃, the die temperature is controlled to be 170 ℃ and the fluorescent sheath material is obtained through extrusion; the rest of the operation was the same as in example 23.
Comparative example 7
The noctilucent short-circuit ground lead of example 1 of the patent application publication No. CN 103310899 a.
Effect example 1
According to the test methods and standards of GB/T5023-2008 and GB/T12706-2008, the following tests are respectively carried out on the fluorescent sheaths of the noctilucent grounding wires of examples 1-24 and comparative examples 1-6, and the standard values of all test items are specifically as follows:
tensile strength is not less than 15.0 MPa;
elongation at break of not less than 180%;
thermal deformation is less than or equal to 50 percent;
the thermal aging temperature is 100 +/-2 ℃;
the tensile strength after aging is more than or equal to 15.0 MPa;
the elongation at break after aging is more than or equal to 180 percent;
the specific test results are detailed in table 3.
TABLE 3 test results of the Properties of the fluorescent sheaths of the noctilucent grounding lines of examples 1-24 and comparative examples 1-6
The detection results in table 3 show that the fluorescent material is successfully added into the outer sheath of the grounding wire, and all performance indexes of the obtained fluorescent sheath material meet the standard requirements. Examples 10 to 13 show that the ratio between the two components in the toughening agent has a greater influence on the overall performance of the sheath. Examples 14 to 17 show that the amount of the toughening agent added has a certain influence on the tensile strength, elongation at break, heat deformability, and the like of the fluorescent sheath. The examples 18-24 show that the tensile strength and the aging resistance of the fluorescent sheath are improved after the hollow glass beads are added, and the combination of the comparative examples 4-6 shows that the addition amount and the addition time of the hollow glass beads have great influence on the performance of the fluorescent sheath; if the addition amount is too much, the elongation at break of the sheath does not meet the standard requirement, and if the addition amount is too little, the aging resistance can not be improved. Comparative example 1 shows that the type of the coupling agent affects the performance of the sheath, and possibly the compatibility and the crosslinking performance of the PVC resin and the EVA are affected by the coupling agent, and improper selection can cause the reduction of the compatibility, so that the sheath is easy to crack, and the mechanical property is reduced. It is shown by comparative example 2 that the VA content in EVA has an influence on the jacket performance. The results of comparative example 3 show that the inverse particle size of hollow glass microspheres and fluorescent blanking particles can cause the elongation at break of the sheath to be greatly reduced to be not in accordance with the standard requirements.
Effect example 2
The noctilucent grounding wires of the embodiments 3, 7, 12, 15, 19 and 23 of the invention and the grounding wires of the comparative examples 1 to 7 are respectively placed in an openable sealed observation box with the volume of 0.25m by 5cm3The top end of the observation box is provided with an observation port, and no light source is arranged in the observation box. The light emission of each ground line was observed and recorded in table 4.
The ground wires were taken out of the observation box, bent alternately for 10 times and 20 times, and then placed in the observation box again for observation, and the results are shown in table 4. Wherein, the bending angle of each time is from 180 degrees to less than 45 degrees.
TABLE 4 luminous effect of different luminous grounding wires
The results in table 4 show that the noctilucent ground wire of the present invention has a good light emitting effect, and is superior to the existing ground wire in which the luminescent material is filled between the insulating sheath and the transparent sheath. Moreover, the luminous performance is basically not affected after the bending for many times, and the luminous stability is good. The luminous effect of the grounding wires of comparative examples 1 and 2 shows that the properties of the coupling agent and the EVA have an influence on the luminous effect of the grounding wire. The light-emitting conditions of comparative examples 3 to 6 show that the addition amount, the particle size and the addition timing of the hollow glass beads have great influence on the light-emitting performance of the grounding wire of the invention.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can modify the embodiments without inventive contribution as required after reading this specification, but only fall within the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a night light earth connection, includes the earth connection body, the earth connection body includes the insulating sheath of copper core and parcel copper core, its characterized in that, the outer parcel of insulating sheath has the fluorescence sheath, the fluorescence sheath is formed by the raw materials preparation of following part by weight: 80-110 parts of polyvinyl chloride resin, 3-8 parts of ethylene-vinyl acetate copolymer, 10-20 parts of fluorescent material, 5-13 parts of toughening agent, 0.5-2 parts of antioxidant, 1-3 parts of coupling agent and 3-10 parts of hollow glass beads; the weight percentage content of vinyl acetate in the ethylene-vinyl acetate copolymer is 30-35%; the particle size of the fluorescent material is 4-8 μm, and the particle size of the hollow glass bead is 2-4 μm; the coupling agent is a silane coupling agent A-172, the toughening agent comprises an ethylene-octene copolymer and an ethylene-butene copolymer, and the weight ratio of the ethylene-octene copolymer to the ethylene-butene copolymer is (3-6): 1.
2. the noctilucent ground wire of claim 1, wherein: 90-100 parts of polyvinyl chloride resin, 5-7 parts of ethylene-vinyl acetate copolymer, 13-17 parts of fluorescent material, 8-10 parts of toughening agent, 1-1.5 parts of antioxidant and 1.5-2.5 parts of coupling agent.
3. A processing technology of a noctilucent ground wire according to claim 1 or 2, characterized by comprising the following processing steps:
preparing a fluorescent sheath material: uniformly mixing polyvinyl chloride resin, an ethylene-vinyl acetate copolymer, a toughening agent, an antioxidant and a coupling agent, and extruding by using a double screw at the temperature of a neck mold of 150-180 ℃ to obtain a high-temperature material B; feeding the high-temperature material B into another double-screw extruder, adding hollow glass beads and a fluorescent material at the head of the extruder at the neck mold temperature of 160-;
preparing a luminous grounding wire: and extruding the fluorescent sheath from the ground wire body and the fluorescent sheath material through a double-screw extruder, and sequentially adjusting the tension and arranging wires to obtain the noctilucent ground wire.
4. The processing technology of the noctilucent ground wire according to claim 3, characterized in that: adding the hollow glass beads and the fluorescent material from the machine head until the fluorescent sheath material is obtained by extrusion, wherein the required time is 10-15 s.
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| EP0903389A1 (en) * | 1996-05-31 | 1999-03-24 | Toto Ltd. | Antifouling member and antifouling coating composition |
| CN203082633U (en) * | 2013-02-04 | 2013-07-24 | 厦门海麟照明科技有限公司 | Attachable shadowless light-emitting diode (LED) fluorescent lamp |
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| CN201041757Y (en) * | 2007-05-08 | 2008-03-26 | 王春胜 | A transparent luminescent ground cable |
| CN103310899A (en) * | 2013-06-02 | 2013-09-18 | 安徽省电力公司蚌埠供电公司 | Portable noctilucent short circuit earth lead |
| CN107219600A (en) * | 2015-04-05 | 2017-09-29 | 沈群华 | Luminous optical cable and luminous cable |
| CN104698559B (en) * | 2015-04-05 | 2018-01-26 | 重庆成瑞光电科技有限公司 | The preparation method of luminous optical cable |
| CN105837997A (en) * | 2016-06-18 | 2016-08-10 | 合肥浦尔菲电线科技有限公司 | Novel environment-friendly cable sheath and production process thereof |
| CN106867353A (en) * | 2017-03-30 | 2017-06-20 | 南通蛇类治疗研究所 | Oyster shell whiting night energy-accumulating luminous nano paint |
| CN108912539A (en) * | 2018-06-21 | 2018-11-30 | 合肥安力电力工程有限公司 | A kind of insulating heat-conductive CABLE MATERIALS and preparation method thereof |
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| EP0903389A1 (en) * | 1996-05-31 | 1999-03-24 | Toto Ltd. | Antifouling member and antifouling coating composition |
| CN203082633U (en) * | 2013-02-04 | 2013-07-24 | 厦门海麟照明科技有限公司 | Attachable shadowless light-emitting diode (LED) fluorescent lamp |
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