Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
  • C09D183/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
  • C09D183/14—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
  • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
  • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
  • C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
  • C23C18/1208—Oxides, e.g. ceramics
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C24/00—Coating starting from inorganic powder
  • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
• • 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
  • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
  • H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
• • 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
  • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
  • H01B3/305—Polyamides or polyesteramides
• • 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
  • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
  • H01B3/306—Polyimides or polyesterimides
• • 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
  • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
  • H01B7/29—Protection against damage caused by extremes of temperature or by flame
  • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/28—Coils; Windings; Conductive connections
  • H01F27/32—Insulating of coils, windings, or parts thereof
  • H01F27/323—Insulation between winding turns, between winding layers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
  • H04R9/02—Details
  • H04R9/04—Construction, mounting, or centering of coil
  • H04R9/045—Mounting
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F5/00—Coils
  • H01F5/06—Insulation of windings
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/066—Electromagnets with movable winding

Definitions

• the present invention relates to a ceramic insulated wire, a self-fusing ceramic insulated wire, a coating composition, a coil, and a voice coil for a speaker. More specifically, a ceramic insulated wire and a self-fusing ceramic insulated wire capable of maintaining coil characteristics even at high temperatures, a coating composition for producing the ceramic insulated wire, It relates to coils using electric wires and voice coils for speed. Background art
• a self-fusing wire wound in a line has been used as a voice coil for a speaker or a coil for a motor.
• an insulating paint such as polyester is used for an insulating film.
• an alcohol-soluble polyamide resin paint dissolved in an organic solvent is used for the fusion coating.
• the heat-resistant temperature of the insulation film is about 350 ° C, if the self-fusing electric wire becomes 350 ° C or more, there is a problem that the characteristics of the coil may be deteriorated. Was.
• a first object of the present invention is to provide a ceramic insulated wire and a self-fusing ceramic insulated wire capable of maintaining the characteristics of a coil even at a high temperature.
• a second object of the present invention is to provide a coating composition for producing the ceramic insulated wire.
• a third object of the present invention is to provide a coil using the ceramic insulated wire and a voice coil for a speaker.
• DISCLOSURE OF THE INVENTION '' provides a ceramic comprising a coating composition containing a zirconium compound and a silicon compound applied to a conductor and thermally cured to form a ceramic insulating film.
• a ceramic comprising a coating composition containing a zirconium compound and a silicon compound applied to a conductor and thermally cured to form a ceramic insulating film.
• a coating composition containing a zirconium compound and a silicon compound is directly applied to a conductor and baked to form a ceramic insulating film.
• a flexible electric wire with heat resistance that can maintain the characteristics was obtained.
• the present invention provides an adhesive coating obtained by dissolving a polyamide resin or a polyimide resin with an organic solvent on a ceramic insulating film of a ceramic insulated wire having the above-described configuration, and thermally curing and fusing.
• a self-fusing ceramic insulated wire characterized by having a film formed thereon.
• the present invention provides a coating composition comprising:
• 1 represents an organic group having 1 to 8 carbon atoms
• R 2 represents an alkyl group having 1 to 5 carbon atoms and / or an acyl group having 1 to 4 carbon atoms.
• the coating composition according to the third aspect described above comprises a zirconium compound or Z and silane / zirconium compound which has very high reactivity with organopolysiloxane and is excellent in heat resistance, corrosion resistance and durability. Since the composition is a flexible and highly heat-resistant insulating film, it can be suitably used for the ceramic insulated wire or the self-fusing ceramic insulated wire having the above configuration.
• additives such as an organic acid, an inorganic acid, various surfactants, a coupling agent, a chelating agent, and an inorganic pigment may be added to the components (a), (b), and (c).
• the organopolysiloxane in the component (a) is used as a highly heat-resistant and flexible insulating coating.
• Organopolysiloxane is obtained by dehydrating and condensing a hydrolyzate of halogenated alkylsilane or alkoxysilane, and uses pure silicone varnish.
• This is a silicon polymer with a siloxane (1-Si-0-Si-) bond as the main chain and a methyl group or a phenyl group in the side chain.
• the polycondensation is made by dissolving the initial condensate in a solvent.
• the condensation of the hydroxyl groups remaining in the polysiloxane is further advanced to form a three-dimensional network structure.
• the alkyl group is methyl, the heat resistance is highest and the water repellency is excellent. Therefore, dimethyl silicone resin is mainly used as the organopolysiloxane in the coating composition of the present invention.
• the solid content of the organopolysiloxane in the component (a) is usually 45 to 60% by weight, preferably 50 to 55% by weight.
• the proportion of the component (a) in the coating composition is 5 to 55 parts by weight, preferably 25 to 50 parts by weight, in terms of solid content. 5 parts by weight
• the coating is too thin, and the component (c) increases relatively to lower the coating rate.
• the viscosity becomes too high and the workability deteriorates.
• the zirconium tetraalkoxide in the component (b) is hydrolyzed in the presence of a small amount of water to form a hydrolyzate zirconium tetrahydroxide, and the hydrolyzate is polycondensed to form a partial condensate, which is further polymerized. Since it is quantified to form a thin film with the passage of time, it functions as a high heat-resistant coating agent together with the component (a) and further promotes the curing, densification, and high heat resistance of the component (a).
• the zirconium tetraalkoxide in the component (b) has a very rapid hydrolysis and polycondensation reaction, and therefore cures in a short time by heating at a low temperature in combination with the component (a).
• R in the zirconium tetraalkoxide is, for example, an alkyl group having 1 to 5 carbon atoms, such as a methyl group, an ethyl group, an n-butyl group, a sec-butyl group, and an n-propyl group.
• Specific examples include zirconium tetramethoxide, zirconium tetraethoxide, zirconium tetra-n-butoxide, zirconium tetra-sec-butoxide, zirconium tetrapropoxide, and the like. One or more of these may be used. The above can be used together.
• the component (b) is particularly preferably zirconium tetra-n-butoxide.
• the zirconium tetraalkoxide as the component (b) includes, in addition to zirconium tetraalkoxide, a hydrolyzate thereof and a partial polycondensate of the hydrolyzate.
• a hydrolyzate and a Z or partial polycondensate may be formed from zirconium tetraalkoxide in the mixture, or may be previously blended when preparing the mixture. No.
• the tetraalkoxysilane in the component (b) also gradually hydrolyzes in the presence of water to form a hydrolyzate, tetrasilanol, and the hydrolyzate undergoes polycondensation to cause partial polymerization. Since a condensate is formed and the molecular weight is further increased to form a thin film, it acts as a highly heat-resistant coating agent, which further promotes the curing of component (a), high density, and high heat resistance.
• Tetraalkoxysilanes have much slower hydrolysis and polycondensation reactions than zirconium tetraalkoxides. Therefore, by mixing the two, the hydrolysis rate becomes appropriate, the workability is good, and the hardness (flexibility) of the coating film can be adjusted and cracks can be prevented.
• R in the tetraalkoxysilane is, for example, an alkyl group having 1 to 5 carbon atoms, such as a methyl group, an ethyl group, an n-butyl group, an n-propyl group, and an i-propyl group. Specific examples include tetramethoxysilane, tetraethoxysilane, tetra-n-butoxysilane, tetra-n-propoxysilane, and one or more of these may be used in combination.
• the component (b) is particularly preferably tetraethoxysilane.
• the tetraalkoxysilane in the component (b) includes not only tetraalkoxysilane but also a hydrolyzate and a partial condensate of the hydrolyzate.
• a hydrolyzate and / or a partial condensate may be composed of a tetraalkoxysilane in the composition, and may be prepared by using a hydrolyzate and a Z or a partial polycondensate in advance in preparing the composition. Good.
• the mixing ratio is 20 to 70:30 to 80 parts by weight, preferably 30 to 60: 40 to 70 parts by weight (the total is 100 parts by weight).
• the proportion of the component (b) in the coating composition is 0.5 to 15 parts by weight, preferably 1 to 5 parts by weight, in terms of solid content. If the amount is less than 0.5 part by weight, the curing reaction will be slow or the heat resistance will be insufficient.On the other hand, if the amount exceeds 15 parts by weight, the reaction will be too fast or the curing reaction will proceed too much to form a coating film. It is not preferable because cracking or peeling occurs.
• the organic solvent in the component (c) is a mixed dispersant and a concentration modifier for the components (a) and (b), and is used as a curing speed regulator for the components (a) and (b). is there.
• a low-boiling organic solvent for example, a low-boiling organic solvent, a glycol derivative, and an alcohol are preferable.
• organic solvents for example, a low-boiling organic solvent, a glycol derivative, and an alcohol are preferable.
• Specific examples include xylene, toluene, methyl ethyl ketone, ethylene glycol, ethylene acetate, ethylene glycol monoethyl ether, diethylene glycol monobutyl ether, n-butyl alcohol, methanol, ethanol and the like. .
• One of these may be used in combination of two or more.
• the organic solvent in the component (c) includes the organic solvent contained in the components (a) and (b).
• the proportion of the component (c) in the coating composition is 30 to 94.5 parts by weight, preferably 40 to 80 parts by weight. If the amount is less than 30 parts by weight, the viscosity of the composition increases and the workability deteriorates, and the coating film becomes too thick and cracks. On the other hand, if the amount exceeds 94.5 parts by weight, the coating film is too thin, so that insulation properties cannot be realized, which is not preferable.
• the present invention provides a coil formed by winding the above-described ceramic insulated wire, wherein the coil shape is held by an adhesive paint applied to the ceramic insulated wire during winding.
• the present invention provides a coil characterized by the following.
• the coil according to the fourth aspect uses the ceramic insulated wire having the above configuration, the heat resistance is improved, and the coil is extremely suitable for use in a high-temperature environment. Become.
• the present invention provides a coil formed by winding the above-described ceramic insulated wire, wherein the coil shape is formed by a coating composition having a higher configuration applied to the ceramic insulated wire during winding.
• a coil characterized in that the coil is held.
• the coil according to the fifth aspect uses the ceramic insulated wire having the above configuration and the coil shape is maintained by the coating composition having the above configuration, so that the heat resistance is further improved, and the coil is used in a high-temperature environment. And the shape retention is also good.
• the present invention provides a voice voice coil characterized by using the ceramic insulated wire or the self-fusing ceramic insulated wire configured as described above.
• the voice coil for a speaker uses the self-fusing ceramic insulated wire or the self-fusing ceramic insulated wire having the above-described configuration, the heat resistance is improved and the speaker is extremely suitable for use in a high-temperature environment. Suitable for high output speakers.
• FIG. 1 is a sectional view showing a ceramic insulated wire according to the first embodiment.
• FIG. 1 is a sectional view showing a ceramic insulated wire according to the first embodiment.
• FIG. 2 is a chart showing a composition example of a coating composition according to the present invention.
• FIG. 3 is an explanatory diagram showing a chemical structural formula of the ceramic insulating coating according to the present invention.
• FIG. 4 is a cross-sectional view showing a self-fusing ceramic insulation-coated wire according to a second embodiment.
• FIG. 5 is a sectional view showing a speaker voice coil according to a third embodiment.
• FIG. 6 is a cross-sectional view showing a high output speed using the voice coil for speaker according to the third embodiment.
• FIG. 7 is a block diagram showing a test circuit for speed.
• FIG. 8 is a characteristic diagram showing a test result of a high-output speaker using the speaker voice coil according to the third embodiment.
• FIG. 9 is a characteristic diagram showing test results of the speaker of the comparative example. BEST MODE FOR CARRYING OUT THE INVENTION
• FIG. 1 is a sectional view of a ceramic insulated wire 10 according to a first embodiment of the present invention.
• This ceramic insulated wire 10 has a structure in which a ceramic insulating film 2 is formed on the outer periphery of a conductor 1.
• the conductor 1 is a copper wire having a diameter of 0.02 to 0.5 mm.
• the ceramic insulating film 2 was formed by applying the coating composition of Composition Example 1, Composition Example 2, or Composition Example 3 shown in FIG. 2 to the conductor 1 and heat-curing (heat-curing). Things.
• the thickness of the ceramic insulating film 2 is 3 to 12 zm.
• FIG. 3 shows a chemical structural formula of the ceramic insulating film 2.
• FIG. 4 is a sectional view of a self-fusing ceramic insulated wire 20 according to a second embodiment of the present invention.
• the self-fusing ceramic insulated wire 20 has a structure in which a fusion coating 3 is formed on the outer periphery of the ceramic insulated wire 10.
• the fusion coating 3 is formed by applying a coating material obtained by dissolving a polyamide-based resin or a polyimide-based resin with an organic solvent to the ceramic insulated wire 10 and thermally curing (heating and curing).
• the thickness of the fusion coating 3 is 3 to 10 / im.
• the polyamide resin used was M1178 or M1603, trade name of Elfat cheni, Germany.
• the polyimide resin used was BT210, trade name of Mitsubishi Gas Chemical Company.
• FIG. 5 shows a speaker voice coil 3 according to a third embodiment of the present invention.
• the speaker voice coil 30 is wound around the outer periphery of a cylindrical pobin 31 around which the self-fusing ceramic insulated wire 20 (outer diameter 0.25 mm) is wound (with a resistance value of 3.25). 5 ⁇ ) and heated at 190 ° C for 30 minutes to fuse the entire winding integrally.
• self-fusing ceramic A polyamide-based varnish was used for the fusion coating 3 of the heat insulating coated electric wire 20.
• the pobin 31 is a material obtained by coating a polyimide resin on a glass fiber cloth.
• FIG. 6 is a cross-sectional view of a high-output speaker 40 using the speaker voice coil 30.
• This high-output speaker 40 supports a voice coil 30 for speed power on a frame 41 via a damper 42, and has an edge 47 between the voice coil 30 for the speaker and the frame 41.
• a diaphragm 43 is stretched via a frame, and a frame 41 supports a magnetic circuit composed of a plate 44, a yoke 45, and a magnet 46.
• the diameter of the high-output speaker 40 is 17 cm.
• FIG. 7 is a block diagram of a test circuit of the high output speaker 40.
• Pink Noise Oscillator Generates pink noise in NG and generates high-output speakers via a weighting network WN (conforming to IEC 268-1 C), a clipping circuit CL and amplifier A to create a test frequency characteristic from pink noise. Driven 0.
• the voltage was measured with an rms voltmeter V to determine the power.
• the high-output speaker 40 did not break until 250 W or more.
• FIG. 9 shows the test results of the comparative example.
• the speaker of the comparative example was disconnected at 200 W.
• the loudspeaker of this comparative example is a self-fusing electric wire using an amidimide insulating coating instead of the ceramic insulating coating 2 and a polyamide varnish for the fusion coating (a self-fusing AIW wire manufactured by Tokyo Special Electric Cable Co., Ltd.) ) To form a voice coil.
• the disconnection was caused by both the amide imide insulating coating and the fusion coating of the polyamide varnish being thermally melted to unwind the coil, and the electric wire hitting the plate 44.
• first layer 80 turns, second layer
• a polyamide-based varnish was applied to an amide imid insulated wire (0.25 mm outer diameter), and two layers (the first layer of 80 turns) were formed around the outer periphery of a cylindrical pobin having a diameter of 30 mm. The second layer was wound around 70 turns) to form a coil.
• the coating composition of the present invention is suitable for heat-resistant insulation of other metals. Industrial applicability
• the characteristics of the coil can be maintained even at high temperatures.
• the ceramic insulated wire or the self-fusing ceramic insulated wire having the above configuration can be suitably manufactured. It is also suitable for heat-resistant insulation of other metals.
• the heat resistance is improved, and the coil is extremely suitable for use in a high-temperature environment.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Inorganic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Ceramic Engineering (AREA)
• Power Engineering (AREA)
• Signal Processing (AREA)
• Acoustics & Sound (AREA)
• Thermal Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Insulated Conductors (AREA)
• Paints Or Removers (AREA)
• Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
• Organic Insulating Materials (AREA)

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• 2001
  • 2001-01-24 JP JP2001016077A patent/JP3930254B2/ja not_active Expired - Fee Related
• 2002
  • 2002-01-22 EP EP02710324A patent/EP1365421A4/en not_active Withdrawn
  • 2002-01-22 US US10/468,568 patent/US6867374B2/en not_active Expired - Fee Related
  • 2002-01-22 WO PCT/JP2002/000446 patent/WO2002059911A1/ja not_active Ceased

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