CN110970184A - Mica tape preparation method - Google Patents
Mica tape preparation method Download PDFInfo
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- CN110970184A CN110970184A CN201911305374.3A CN201911305374A CN110970184A CN 110970184 A CN110970184 A CN 110970184A CN 201911305374 A CN201911305374 A CN 201911305374A CN 110970184 A CN110970184 A CN 110970184A
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- mica
- paper
- mica tape
- magma
- glass fiber
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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
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/60—Composite 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
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/66—Joining insulating bodies together, e.g. by bonding
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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
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
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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
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
Landscapes
- Laminated Bodies (AREA)
- Paper (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention discloses a mica tape preparation method, which comprises the following steps: 1) making the suspension of the mica fine pulp to obtain mica paper; 2) bonding and pressing the glass fiber cloth and the mica paper surface paste prepared in the step 1) to obtain composite paper cloth, wherein the mica paper is in a wet state during bonding and pressing; 3) and carrying out squeezing treatment, drying and curing treatment on the composite paper cloth to obtain the target product mica tape. Compared with the traditional process, the preparation method is simple to operate; according to the invention, the glass fiber cloth with the adhesive is directly embedded into the mica paper wet blank under the external pressure, and the forming body are deeply combined with each other, so that the contact surface of the composite material is greatly enhanced, the base material is more effectively reinforced, and the composite mica tape with better effect is obtained.
Description
Technical Field
The invention belongs to the field of mica tape preparation, and particularly relates to a mica tape preparation method.
Background
The mica tape product is a disk tape-shaped insulating material which is formed by compounding an adhesive, mica paper and a reinforcing material and performing baking, rolling and cutting processing. Wherein, the mica paper is used as a main insulating and fireproof material and is formed by bonding the mica flakes by weak van der Waals force, although the insulating and fireproof performance is excellent, the mechanical strength of the mica paper is too poor, and the mica paper can be practically applied only by reinforcement; the reinforcing materials such as the glass fiber cloth and the film provide toughness in the processing process of the mica tape, and the mica tape reinforced by the glass fiber cloth has higher temperature resistance than the mica tape reinforced by the film; the adhesive is used for bonding mica paper and glass fiber cloth, and under the environmental protection pressure, the application of water-based and emulsion adhesives in the bonding of mica tapes is more and more common.
At present, the production method of the general mica tape is to prepare mica paper, prepare an adhesive and glass fiber cloth, then compound, dry, wind, cut and wind, and has long production cycle, and the mica tape is easy to layer when applied and to start filament when wound, all of which are because the glass fiber cloth and the mica paper are distributed in the upper and lower 2 layers in the bonding process of bonding the glass fiber cloth and the mica paper, and the glass fiber cloth can not be embedded into the structure of the mica paper.
The mica tape is a composite material obtained by compounding mica paper and a reinforcing material, such as glass fiber cloth, under the action of an adhesive, wherein the mica paper is used as a main body for providing fire resistance and insulation, the reinforcing material is used for reinforcing and compensating the brittleness of the mica paper, and the adhesive is the key for combining the mica paper and the reinforcing material without layering. Structurally, this type of composite material has a distinct layered structure, one layer of reinforcing material and the other layer of mica paper, with the mica paper and the reinforcing material being bonded together by the adhesive force of the adhesive. A significant drawback of this type is that the reinforcing material does not form an effective direct bond with the substrate, relying only on interfacial bonding, the failure of this bonded interface necessarily resulting in a functional failure of the composite material; meanwhile, the composite material is a composite of 2 layers and above materials, and the thickness of the composite material is the superposition of the thicknesses of all the materials.
Disclosure of Invention
One purpose of the invention is to provide a mica tape preparation method, which is simple to operate compared with the traditional process; moreover, the mica tape prepared by the method has enhanced mechanical strength, and has no defects of layering, silk lifting and the like.
The technical scheme provided by the invention is as follows: the invention provides a mica tape preparation method, which comprises the following steps:
1) making the suspension of the mica fine pulp to obtain mica paper;
2) bonding and pressing the glass fiber cloth and the mica paper surface paste prepared in the step 1) to obtain composite paper cloth; wherein, when in bonding and pressing, the mica paper is in a wet state;
3) and carrying out squeezing treatment, drying and curing treatment on the composite paper cloth to obtain the target product mica tape.
Preferably, in the mica tape preparation method, before the step 2), the mica paper is subjected to water absorption treatment.
Preferably, in the mica tape preparation method, the step 2) is specifically as follows:
2A) sizing on glass fiber cloth;
2B) and (3) bonding and pressing the mica paper and the glass fiber cloth gold river after glue application.
Preferably, in the mica tape preparation method, the mica magma is one or a combination of several of muscovite magma, phlogopite magma, calcined muscovite magma, calcined phlogopite magma and synthetic mica magma.
Preferably, in the mica tape preparation method, the particle size distribution of the mica seminal plasma is between-4 meshes and +120 meshes.
Preferably, in the mica tape preparation method, the particle size distribution of the mica seminal plasma is between-8 meshes and +100 meshes.
Preferably, in the mica tape preparation method, the particle size distribution of the mica seminal plasma is between-10 meshes and +80 meshes.
Preferably, in the mica tape preparation method, the binder for sizing is one of aqueous epoxy resin glue, aqueous polyester resin glue, aqueous polyurethane resin glue, aqueous polyurea resin glue, aqueous polyimide resin glue, aqueous organic silicon resin glue and their modified aqueous resin glue, and/or adhesives formed by epoxy resin emulsion/microemulsion, polyester resin emulsion/microemulsion, polyurethane resin emulsion/microemulsion, polyurea resin emulsion/microemulsion, polyimide resin emulsion/microemulsion, organic silicon resin emulsion/microemulsion and their modified substances.
Preferably, in the mica tape preparation method, in the step 3), the composite paper cloth is further subjected to slitting treatment after being subjected to pressing treatment, drying and curing treatment.
The invention at least comprises the following beneficial effects:
(1) compared with the traditional process, the preparation method is simple to operate;
(2) the mica tape prepared by the invention is internally reinforced, and the glass fiber cloth is embedded into the mica paper and macroscopically on the same plane with the mica paper;
(3) the mica tape prepared by the method has enhanced mechanical strength, and has no defects of layering, silk forming and the like.
(4) In the invention, the glass fiber cloth and the mica paper have no obvious interface, and the glass fiber cloth and the mica paper are deeply combined with each other body to body instead of the interface. The mica paper wet blank has certain strength and can bear certain pressure in the later stage of mica paper making, and in this state, a reinforcing material with an adhesive, such as glass fiber cloth with adhesive, is directly embedded into the mica paper wet blank under the external pressure, so that the forming body and the body are deeply combined with each other, the contact surface of the composite material is greatly enhanced, the base material is more effectively reinforced, and the composite mica tape with better effect is obtained.
Drawings
Fig. 1 is a schematic structural diagram of a mica tape obtained in example 1 of the present invention.
FIG. 2 is a schematic structural view of a mica tape obtained by a comparative example of the present invention.
FIG. 3 is a microscopic view of the mica tape obtained in example 1 of the present invention.
FIG. 4 is a microscopic view of a mica tape obtained by the comparative example of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The invention provides a mica tape preparation method, which comprises the following steps:
1) making the suspension of the mica fine pulp to obtain mica paper; carrying out vacuum water absorption treatment on the mica paper, wherein the mica paper after the vacuum water absorption treatment is in a wet state;
sizing on glass fiber cloth;
2) compounding the glass fiber cloth after sizing and the mica paper prepared in the step 1) through a compression roller to obtain composite paper cloth, wherein when bonding and laminating are carried out;
3) and carrying out squeezing treatment, drying and curing treatment, rolling and slitting on the composite paper cloth to obtain the target product mica tape.
Preferably, in the mica tape preparation method, the mica magma is one or a combination of several of muscovite magma, phlogopite magma, calcined muscovite magma, calcined phlogopite magma and synthetic mica magma.
Preferably, in the mica tape preparation method, the particle size distribution of the mica seminal plasma is between-4 meshes and +120 meshes.
Preferably, in the mica tape preparation method, the particle size distribution of the mica seminal plasma is between-8 meshes and +100 meshes.
Preferably, in the mica tape preparation method, the particle size distribution of the mica seminal plasma is between-10 meshes and +80 meshes.
Preferably, in the mica tape preparation method, the binder for sizing is one of aqueous epoxy resin glue, aqueous polyester resin glue, aqueous polyurethane resin glue, aqueous polyurea resin glue, aqueous polyimide resin glue, aqueous organic silicon resin glue and their modified aqueous resin glue, and/or adhesives formed by epoxy resin emulsion/microemulsion, polyester resin emulsion/microemulsion, polyurethane resin emulsion/microemulsion, polyurea resin emulsion/microemulsion, polyimide resin emulsion/microemulsion, organic silicon resin emulsion/microemulsion and their modified substances.
Example 1
Selecting imported Indian phlogopite, conveying the imported Indian phlogopite to a hydraulic crusher through a material conveyer, carrying out grading concentration to obtain a suspension of Indian phlogopite fine pulp, and conveying the suspension to a pulp making machine for pulp making treatment;
selecting a quantitative 32g/m2The glass fiber cloth is coated with organic silicon modified epoxy resin emulsion; compounding the glass fiber cloth after sizing and the mica paper prepared in the step 1) by a compression roller by using a vacuum water suction roller of a papermaking machine, entering a pressing part through the vacuum water suction roller, and pressing the glass fiber cloth into a mica paper blank under the pressing action of the pressing part to form composite mica paper; the composite mica paper passes through a multi-temperature-section variable-temperature drying channel, is dried and cured, and then passes through a winding machine to form a mica tape blank tape. And cutting the mica tape blank tape to obtain the mica tape.
Comparative example
Selecting imported Indian phlogopite, conveying the imported Indian phlogopite to a hydraulic crusher through a conveying machine, and performing grading concentration to obtain a suspension of Indian phlogopite seminal plasma;
the quantitative 32g/m of the phlogopite paper is soaked with the epoxy resin emulsion modified by organic silicon on a material conveying belt according to the conventional mica belt production process2And (4) compounding the glass fibers, drying to obtain a mica tape roll, and slitting to obtain the phlogopite tape.
TABLE 1 comparison of mica tape Properties
| Example 1 | Comparative example | |
| Production method | One-step process | General method |
| Mica tape basis weight (g/m)2) | 190 | 192 |
| Mica quantitative (g/m)2) | 140 | 140 |
| Glass fiber ration (g/m)2) | 32 | 32 |
| Glue quantity (g/m)2) | 18 | 20 |
| Mica tape thickness (mum) | 87 | 90 |
| Breakdown strength (kV) | 1.5 | 1.5 |
| Tensile Strength (N/cm) | 145 | 129 |
As can be seen from the data in table 1, the mica tape obtained in example 1 of the present invention has a reduced thickness and greatly increased mechanical properties (tensile strength) compared to the mica tape prepared by the conventional process;
FIG. 1 is a schematic structural view of a mica tape obtained in example 1 of the present invention; FIG. 2 is a schematic structural view of a mica tape obtained by a comparative example of the present invention. Wherein, 1-glass fiber cloth, 2-adhesive and 3-mica paper; fig. 1 shows that the mica tape prepared by the present invention has no obvious interface between the glass fiber cloth and the mica paper, and the glass fiber cloth and the mica paper are deeply combined with each other body to body, not only the interface. FIG. 2 shows the mica tape of the comparative example, with a distinct interface between the glass fiber cloth and the mica paper.
As can be seen from fig. 3 and 4, the mica tape obtained by the comparative example of the conventional method is obviously 2-layer structure (glass fiber cloth and mica paper, and a layer of obvious interface is arranged between the glass fiber cloth and the mica paper) from the picture under the microscope, while the mica tape obtained by the example 1 of the invention does not see the obvious interface between the glass fiber cloth and the mica paper, and the two are deeply combined with each other and not only the interface. The mica paper wet blank has certain strength and can bear certain pressure in the later stage of mica paper making, and in this state, a reinforcing material with an adhesive, such as glass fiber cloth with adhesive, is directly embedded into the mica paper wet blank under the external pressure, so that the forming body and the body are deeply combined with each other, the contact surface of the composite material is greatly enhanced, the base material is more effectively reinforced, and the composite mica tape with better effect is obtained.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. A mica tape preparation method is characterized by comprising the following steps:
1) making the suspension of the mica fine pulp to obtain mica paper;
2) bonding and pressing the glass fiber cloth and the mica paper surface paste prepared in the step 1) to obtain composite paper cloth, wherein the mica paper is in a wet state during bonding and pressing;
3) and carrying out squeezing treatment, drying and curing treatment on the composite paper cloth to obtain the target product mica tape.
2. The method for preparing mica tapes according to claim 1, wherein the mica paper is subjected to a water-absorbing treatment before the step 2).
3. The method for preparing a mica tape according to claim 2, wherein the step 2) is specifically:
2A) sizing on glass fiber cloth;
2B) and (3) bonding and pressing the mica paper and the glass fiber cloth gold river after glue application.
4. The method of making a mica tape according to claim 1, wherein the mica magma is one or a combination of muscovite magma, phlogopite magma, calcined muscovite magma, calcined phlogopite magma and synthetic mica magma.
5. The method of making a mica tape according to claim 1, wherein the mica magma has a particle size distribution between-4 mesh and +120 mesh.
6. The method of making a mica tape of claim 5, wherein the mica magma has a particle size distribution between-8 mesh and +100 mesh.
7. The method of making a mica tape according to claim 3, wherein the mica magma has a particle size distribution between-10 mesh and +80 mesh.
8. The method for preparing mica tape according to claim 2, wherein the binder for sizing is one of aqueous epoxy resin glue, aqueous polyester resin glue, aqueous polyurethane resin glue, aqueous polyurea resin glue, aqueous polyimide resin glue, aqueous silicone resin glue and their modified aqueous resin glue, and/or adhesives formed from epoxy resin emulsion/microemulsion, polyester resin emulsion/microemulsion, polyurethane resin emulsion/microemulsion, polyurea resin emulsion/microemulsion, polyimide resin emulsion/microemulsion, silicone resin emulsion/microemulsion and their modified products.
9. The method for preparing a mica tape according to claim 1, wherein in the step 3), the composite paper cloth is further subjected to a slitting treatment after being subjected to a pressing treatment, a drying and curing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911305374.3A CN110970184A (en) | 2019-12-18 | 2019-12-18 | Mica tape preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911305374.3A CN110970184A (en) | 2019-12-18 | 2019-12-18 | Mica tape preparation method |
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| CN110970184A true CN110970184A (en) | 2020-04-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785432A (en) * | 2020-07-16 | 2020-10-16 | 安徽渡江电缆集团有限公司 | Halogen-free flame-retardant control cable |
| CN112053798A (en) * | 2020-08-26 | 2020-12-08 | 湖北平安电工股份有限公司 | Method for manufacturing composite mica tape for electric heating smelting furnace body |
| CN112071530A (en) * | 2020-08-26 | 2020-12-11 | 湖北平安电工股份有限公司 | Preparation method of calcined fire-resistant mica tape |
| CN112796151A (en) * | 2021-02-04 | 2021-05-14 | 通城县云水云母科技有限公司 | Preparation method of active mica paper and related products thereof |
| CN113844067A (en) * | 2021-09-06 | 2021-12-28 | 湖北平安电工科技股份公司 | Mica composite material and manufacturing method thereof |
| CN115029100A (en) * | 2022-05-27 | 2022-09-09 | 湖北平安电工科技股份公司 | Thermosetting hard mica plate repairing agent and preparation method thereof |
| CN116376432A (en) * | 2023-04-23 | 2023-07-04 | 北京倚天凌云科技股份有限公司 | Color separation coating treatment liquid, coating and ceramic color separation mica tape containing coating |
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| CN106816205A (en) * | 2015-12-01 | 2017-06-09 | 株洲时代新材料科技股份有限公司 | The preparation method of a kind of low resin mica tape and by its obtained low resin mica tape |
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2019
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| JPS55144608A (en) * | 1979-04-27 | 1980-11-11 | Mitsubishi Electric Corp | Method of fabricating heat resistive insulator |
| CN2250970Y (en) * | 1995-10-11 | 1997-04-02 | 河南省荥阳市长春造纸厂 | Ribbed paper |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785432A (en) * | 2020-07-16 | 2020-10-16 | 安徽渡江电缆集团有限公司 | Halogen-free flame-retardant control cable |
| CN112053798A (en) * | 2020-08-26 | 2020-12-08 | 湖北平安电工股份有限公司 | Method for manufacturing composite mica tape for electric heating smelting furnace body |
| CN112071530A (en) * | 2020-08-26 | 2020-12-11 | 湖北平安电工股份有限公司 | Preparation method of calcined fire-resistant mica tape |
| CN112053798B (en) * | 2020-08-26 | 2022-05-13 | 湖北平安电工科技股份公司 | Method for manufacturing composite mica tape for electric heating smelting furnace body |
| CN112796151A (en) * | 2021-02-04 | 2021-05-14 | 通城县云水云母科技有限公司 | Preparation method of active mica paper and related products thereof |
| CN113844067A (en) * | 2021-09-06 | 2021-12-28 | 湖北平安电工科技股份公司 | Mica composite material and manufacturing method thereof |
| CN115029100A (en) * | 2022-05-27 | 2022-09-09 | 湖北平安电工科技股份公司 | Thermosetting hard mica plate repairing agent and preparation method thereof |
| CN116376432A (en) * | 2023-04-23 | 2023-07-04 | 北京倚天凌云科技股份有限公司 | Color separation coating treatment liquid, coating and ceramic color separation mica tape containing coating |
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Application publication date: 20200407 |