CN108766686B - Low-surface-resistance flexible insulating material and preparation method thereof - Google Patents
Low-surface-resistance flexible insulating material and preparation method thereof Download PDFInfo
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- CN108766686B CN108766686B CN201810570092.5A CN201810570092A CN108766686B CN 108766686 B CN108766686 B CN 108766686B CN 201810570092 A CN201810570092 A CN 201810570092A CN 108766686 B CN108766686 B CN 108766686B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/60—Composite insulating bodies
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/02—Drying; Impregnating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
Abstract
The embodiment of the invention discloses a low-surface-resistance flexible insulating material and a preparation method thereof. The low-surface-resistance flexible insulating material comprises a low-resistance coating, a first insulating paper layer, a first adhesive layer, a thin film layer, a second adhesive layer and a second insulating paper layer which are sequentially arranged from top to bottom, wherein the low-resistance coating is modified insulating paint doped with nano activated carbon, and the mass content of the nano activated carbon in the modified insulating paint is 10-25%. Through the mode, the insulating material provided by the embodiment of the invention has higher insulating performance, reduces the surface resistance of the insulating material, and can guide out electric charges generated in the operation of the motor in time, so that the operation safety of the motor is effectively improved, and the service life of the motor is prolonged.
Description
Technical Field
The embodiment of the invention relates to the technical field of insulating materials, in particular to a low-surface-resistance flexible insulating material and a preparation method thereof.
Background
The existing flexible insulating material has the purpose of improving the resistance due to the design of the material, so that the volume resistance and the surface resistance are higher before modification treatment. Some motors generate a large amount of charges during operation, and when the charges are accumulated, discharge is generated, so that the insulating material is broken down, the motor is failed, and loss of the motor can be caused to different degrees.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a flexible insulating material with low surface resistance and a preparation method thereof.
In order to achieve the purpose, the embodiment of the invention adopts the following technical scheme: provides a low surface resistance flexible insulating material, which comprises a low resistance coating, a first insulating paper layer, a first adhesive layer, a film layer, a second adhesive layer and a second insulating paper layer which are arranged from top to bottom in sequence, wherein,
the low-resistance coating is modified insulating paint doped with nano activated carbon, and the mass content of the nano activated carbon in the modified insulating paint is 10-25%.
Optionally, the particle size of the nano activated carbon is 20-100 nm.
Optionally, the insulating varnish in the modified insulating varnish is one or more selected from polyester resin, polyimide resin, polyurethane resin, epoxy resin, bismaleimide resin and silicone resin.
Optionally, the first insulating paper layer or the second insulating paper layer is made of electrical insulating polyester non-woven fabric, aramid paper, polyphenylene sulfide film or green case paper.
Optionally, the film layer is a PET film, a PBT film, a PEN film, a PPE film or an P I film.
The embodiment of the invention also provides a preparation method of the low-surface-resistance flexible insulating material, which is characterized by comprising the following steps:
(a) adding a certain amount of nano activated carbon into distilled water, fully stirring after ultrasonic dispersion, adding an organic metal solution into the suspension of the nano activated carbon, filtering and washing after a certain time, and drying to obtain nano activated carbon powder;
(b) adding the prepared nano activated carbon powder into insulating paint, and fully and uniformly mixing to prepare modified insulating paint, wherein the mass content of the nano activated carbon in the modified insulating paint is 10-25%;
(c) coating adhesive glue solution on both sides of the film base material;
(d) drying the film base material with the adhesive solution through a drying tunnel, and removing the solvent in the adhesive solution of the adhesive to prepare the film base material with the adhesive;
(e) respectively attaching insulating paper to two surfaces of the film substrate with the adhesive, and after hot-pressing compounding, uniformly coating the prepared modified insulating paint on the insulating paper on any surface to obtain a primary composite insulating material;
(f) and drying the primary composite insulating material through a drying tunnel again, removing the solvent of the modified insulating paint, cooling, rolling, and curing to obtain the low-surface-resistance flexible insulating material.
Optionally, the particle size of the nano activated carbon is 20-100 nm.
Optionally, the insulating varnish is one or more selected from polyester resin, polyimide resin, polyurethane resin, epoxy resin, bismaleimide resin and silicone resin.
Optionally, the insulating paper is made of electrical insulating polyester non-woven fabric, aramid paper, polyphenylene sulfide film or grey paper.
Optionally, the film substrate adopts a PET film, a PBT film, a PEN film, a PPE film or an P I film.
The embodiment of the invention has the beneficial effects that: different from the situation of the prior art, the insulating material provided by the embodiment of the invention comprises a low-resistance coating, a first insulating paper layer, a first adhesive layer, a thin film layer, a second adhesive layer and a second insulating paper layer which are sequentially arranged from top to bottom, wherein the low-resistance coating is modified insulating paint doped with nano activated carbon, the mass content of the nano activated carbon in the modified insulating paint is 10-25%, and the insulating paint is modified by the nano activated carbon, so that the insulating material has higher insulating performance, the surface resistance of the insulating material is reduced, charges generated in the operation of a motor can be timely guided out, the operation safety of the motor is effectively improved, and the service life of the motor is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a low surface resistance flexible insulating material provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, methods, schemes and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a low-surface-resistance flexible insulating material, which comprises a low-resistance coating 10, a first insulating paper layer 20, a first adhesive layer 30, a thin film layer 40, a second adhesive layer 50 and a second insulating paper layer 60 which are sequentially arranged from top to bottom as shown in figure 1, wherein the low-resistance coating is modified insulating paint doped with nano activated carbon, and the mass content of the nano activated carbon in the modified insulating paint is 10-25%.
The nano activated carbon has conductivity, and after the nano activated carbon is doped into the insulating paint to modify the insulating paint, the conductivity of the prepared modified insulating paint is increased, namely the resistivity of the modified insulating paint is reduced. Therefore, the modified insulating varnish is uniformly coated on the low-resistance coating layer 10 formed on the surface of the first insulating paper layer 20, so that the insulating material can reduce the surface resistance of the insulating material while keeping high insulating performance.
Optionally, the particle size of the nano activated carbon is 20-100 nm.
The insulating varnish in the modified insulating varnish is one or more selected from polyester resin, polyimide resin, polyurethane resin, epoxy resin, bismaleimide resin and organic silicon resin.
The first insulating paper layer 20 or the second insulating paper layer 60 is made of electrical insulating polyester non-woven fabric, aramid paper, polyphenylene sulfide film or blue-shell paper to ensure the heat resistance and good physical and mechanical properties of the insulating material.
Optionally, the thickness of the first or second insulating paper layer 20, 60 is 0.05-0.2 mm.
The film layer 40 is a PET film, a PBT film, a PEN film, a PPE film, or an P I film.
Optionally, the film layer 40 has a thickness of 0.05-0.2 mm.
The insulating material of this embodiment includes the low resistance coating 10 that top-down set gradually, first insulating paper layer 20, first adhesive layer 30, thin layer 40, second adhesive layer 50 and second insulating paper layer 60, wherein, low resistance coating 10 is the modified insulated paint that mixes nanometer active carbon in, the quality content of nanometer active carbon in modified insulated paint is 10 ~ 25, modify insulated paint through nanometer active carbon, make this insulating material reduce its surface resistance when keeping higher insulating properties, can in time guide away the electric charge that produces in the motor operation, thereby the effectual security that improves the motor operation and the life of extension motor.
The embodiment of the invention also provides a preparation method of the insulating material, which comprises the following steps:
(a) adding a certain amount of nano activated carbon into distilled water, fully stirring after ultrasonic dispersion, adding an organic metal solution into a suspension of the nano activated carbon, filtering and washing after a certain time, and drying to obtain nano activated carbon powder;
(b) adding the prepared nano activated carbon powder into insulating paint, and fully and uniformly mixing to prepare modified insulating paint, wherein the mass content of the nano activated carbon in the modified insulating paint is 10-25%;
(c) coating adhesive glue solution on both sides of the film base material;
(d) drying the film base material with the adhesive solution through a drying tunnel, and removing the solvent in the adhesive solution of the adhesive to prepare the film base material with the adhesive;
(e) respectively attaching insulating paper to two surfaces of the film substrate with the adhesive, and after hot-pressing compounding, uniformly coating the prepared modified insulating paint on the insulating paper on any surface to obtain a primary composite insulating material;
(f) and drying the primary composite insulating material through a drying tunnel again, removing the solvent of the modified insulating paint, cooling, rolling, and curing to obtain the low-surface-resistance flexible insulating material.
Optionally, the particle size of the nano activated carbon is 20-100 nm.
The insulating varnish is one or more selected from polyester resin, polyimide resin, polyurethane resin, epoxy resin, bismaleimide resin and organic silicon resin.
The insulating paper is made of electrical insulating polyester non-woven fabric, aramid paper, polyphenylene sulfide film or blue-shell paper.
Optionally, the thickness of the insulating paper is 0.05-0.2 mm.
The film substrate adopts PET film, PBT film, PEN film, PPE film or P I film.
Optionally, the film substrate has a thickness of 0.05 to 0.2 mm.
The following description will discuss a chemical-resistant insulating material according to an embodiment of the present invention with reference to specific examples.
Example 1
(a) Adding a certain amount of nano activated carbon (with the particle size of 40-80nm) into distilled water, performing ultrasonic dispersion, fully stirring, adding an organic metal solution into a suspension of the nano activated carbon, filtering after a certain time, washing, and drying to obtain nano activated carbon powder;
(b) adding the prepared nano activated carbon powder into polyimide paint, and fully and uniformly mixing to prepare modified polyimide paint, wherein the mass content of the nano activated carbon in the modified polyimide paint is 18%;
(c) unwinding a polyimide film (P I film) with the thickness of 0.1mm, and immersing the polyimide film into an adhesive glue solution;
(d) drying the polyimide film with the adhesive solution through a drying tunnel, and removing the solvent in the adhesive solution of the adhesive to prepare the polyimide film with the adhesive;
(e) respectively attaching aramid paper with the thickness of 0.05mm to two surfaces of the polyimide film with the adhesive, and after hot-pressing compounding, uniformly coating the prepared modified polyimide paint on the aramid paper on any surface to obtain a primary composite insulating material;
(f) and drying the primary composite insulating material by the drying tunnel again, removing the solvent of the modified polyimide paint, cooling, rolling, and curing to obtain the low-surface-resistance flexible insulating material, wherein the adhesive content of the insulating material is 12.6%, and the insulating paint content is 6.4%.
Example 2
(a) Adding a certain amount of nano activated carbon (with the particle size of 40-80nm) into distilled water, performing ultrasonic dispersion, fully stirring, adding an organic metal solution into a suspension of the nano activated carbon, filtering after a certain time, washing, and drying to obtain nano activated carbon powder;
(b) adding the prepared nano activated carbon powder into polyester resin paint, and fully and uniformly mixing to prepare modified polyester resin paint, wherein the mass content of the nano activated carbon in the modified polyester resin paint is 22%;
(c) unreeling a polyester film (PET film) with the thickness of 0.05mm, and immersing the PET film into an adhesive glue solution;
(d) drying the polyester film with the adhesive solution through a drying tunnel, and removing the solvent in the adhesive solution of the adhesive to prepare the polyester film with the adhesive;
(e) respectively attaching aramid paper with the thickness of 0.10mm to two surfaces of the polyester film with the adhesive, and uniformly coating the prepared modified polyester resin paint on the aramid paper on any surface after hot-pressing compounding to obtain a primary composite insulating material;
(f) and drying the primary composite insulating material by a drying tunnel again, removing the solvent of the modified polyester resin paint, cooling, rolling, and curing to obtain the low-surface-resistance flexible insulating material, wherein the adhesive content of the insulating material is 17.5%, and the insulating paint content is 9.2%.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations that are made by using the contents of the present specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A low surface resistance flexible insulating material is characterized by comprising a low resistance coating, a first insulating paper layer, a first adhesive layer, a film layer, a second adhesive layer and a second insulating paper layer which are sequentially arranged from top to bottom, wherein,
the low-resistance coating is modified insulating paint doped with nano activated carbon, and the mass content of the nano activated carbon in the modified insulating paint is 10-25%;
the nano activated carbon has conductivity, after the nano activated carbon is doped into the insulating paint to modify the insulating paint, the conductivity of the prepared modified insulating paint is increased, namely the resistivity of the modified insulating paint is reduced, and the modified insulating paint is uniformly coated on the surface of the first insulating paper layer to form a low-resistance coating, so that the insulating material has higher insulating performance and the surface resistance of the insulating material is reduced.
2. The low surface resistance flexible insulation material according to claim 1,
the particle size of the nano activated carbon is 20-100 nm.
3. The low surface resistance flexible insulation material according to claim 2,
the insulating paint in the modified insulating paint is one or more selected from polyester resin, polyimide resin, polyurethane resin, epoxy resin, bismaleimide resin and organic silicon resin.
4. The low surface resistance flexible insulation material according to claim 1,
the first insulating paper layer or the second insulating paper layer is made of electrical insulating polyester non-woven fabric, aramid paper, polyphenylene sulfide film or blue-shell paper.
5. The low surface resistance flexible insulation material according to claim 1,
the film layer is a PET film, a PBT film, a PEN film, a PPE film or a PI film.
6. A method for preparing a flexible insulating material with low surface resistance according to any of claims 1 to 5, characterized in that it comprises the following steps:
(a) adding a certain amount of nano activated carbon into distilled water, fully stirring after ultrasonic dispersion, adding an organic metal solution into the suspension of the nano activated carbon, filtering and washing after a certain time, and drying to obtain nano activated carbon powder;
(b) adding the prepared nano activated carbon powder into insulating paint, and fully and uniformly mixing to prepare modified insulating paint, wherein the mass content of the nano activated carbon in the modified insulating paint is 10-25%;
(c) coating adhesive glue solution on both sides of the film base material;
(d) drying the film base material with the adhesive solution through a drying tunnel, and removing the solvent in the adhesive solution of the adhesive to prepare the film base material with the adhesive;
(e) respectively attaching insulating paper to two surfaces of the film substrate with the adhesive, and after hot-pressing compounding, uniformly coating the prepared modified insulating paint on the insulating paper on any surface to obtain a primary composite insulating material;
(f) and drying the primary composite insulating material through a drying tunnel again, removing the solvent of the modified insulating paint, cooling, rolling, and curing to obtain the low-surface-resistance flexible insulating material.
7. The preparation method according to claim 6, wherein the particle size of the nano activated carbon is 20-100 nm.
8. The production method according to claim 7,
the insulating varnish is one or more selected from polyester resin, polyimide resin, polyurethane resin, epoxy resin, bismaleimide resin and organic silicon resin.
9. The production method according to claim 6,
the insulating paper is made of electrical insulating polyester non-woven fabric, aramid paper, polyphenylene sulfide film or blue-shell paper.
10. The production method according to claim 6,
the film substrate adopts a PET film, a PBT film, a PEN film, a PPE film or a PI film.
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| CN109577079B (en) * | 2018-11-29 | 2021-08-31 | 瑞安复合材料(深圳)有限公司 | Preparation method of low-temperature-resistant and high-temperature-resistant gummed paper for hydroelectric power generation motor |
| CN110293730A (en) * | 2019-06-06 | 2019-10-01 | 瑞安复合材料(深圳)有限公司 | A kind of surface enhanced slot insulation material and preparation method thereof |
| CN113963842A (en) * | 2021-10-13 | 2022-01-21 | 瑞安复合材料(深圳)有限公司 | High partial discharge insulating material for oil-cooled motor and preparation method thereof |
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