CN219832324U - Mica paper tape for winding - Google Patents
Mica paper tape for winding Download PDFInfo
- Publication number
- CN219832324U CN219832324U CN202320467093.3U CN202320467093U CN219832324U CN 219832324 U CN219832324 U CN 219832324U CN 202320467093 U CN202320467093 U CN 202320467093U CN 219832324 U CN219832324 U CN 219832324U
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- CN
- China
- Prior art keywords
- fiber fabric
- fabric layer
- mica paper
- layer
- winding
- Prior art date
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- 239000010445 mica Substances 0.000 title claims abstract description 72
- 229910052618 mica group Inorganic materials 0.000 title claims abstract description 72
- 238000004804 winding Methods 0.000 title claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 48
- 239000000835 fiber Substances 0.000 claims abstract description 46
- 229920001721 polyimide Polymers 0.000 claims abstract description 24
- 239000003292 glue Substances 0.000 claims abstract description 9
- 239000003365 glass fiber Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 71
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 7
- 229920006231 aramid fiber Polymers 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 239000004760 aramid Substances 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 2
- 239000011810 insulating material Substances 0.000 abstract description 3
- 239000012790 adhesive layer Substances 0.000 description 17
- 238000010030 laminating Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Insulating Bodies (AREA)
Abstract
The utility model discloses a mica paper tape for winding, which comprises base mica paper, wherein the upper surface of the base mica tape is provided with a glue layer, a first fiber fabric layer, a polyimide film and a second fiber fabric layer are sequentially formed on the surface of the glue layer, and the surface of the glue layer is sealed by surface mica paper after the surface of the second fiber fabric layer is glued; the first fiber fabric layer is an alkali-free glass fiber fabric layer, and the second fiber fabric layer is a net surface reinforced fiber fabric layer; the polyimide film is provided with hollowed holes, and the hollowed holes are used as interface connecting channels of the first fiber fabric layer and the second fiber fabric layer. The mica paper tape body for winding is soft, has good toughness and better surface binding performance, and is particularly suitable for being used as an insulating material for wire winding.
Description
Technical Field
The utility model relates to a technology of mica paper products in insulating materials, in particular to a mica paper tape for winding.
Background
The mica tape is a tape-shaped insulating material formed by bonding with an epoxy adhesive as a secondary processed product of mica. The mica has the excellent electrical properties of high electrical strength, low dielectric loss, high surface resistance, high volume resistance and the like, and the physical and chemical properties of heat resistance, water resistance, chemical stability, elasticity, shearing resistance, tensile strength and the like, has softness in normal state, and is an ideal wrapping material for fire-resistant cables.
As insulating wrapping material, the quality of mica tape directly or indirectly influences the quality of cable performance, the mica tape in prior art adopts epoxy silicone resin material as adhesive and interface filling material to guarantee the whole physical properties of mica tape, but epoxy silicone resin material generally has the problem that coefficient of heat conductivity is lower, if the quantity is too much, can influence the heat dissipation defect of mica tape, the performance defect appears easily after continuous use, and the quantity is too little, can influence the physical strength and the package performance of mica tape, the laminating nature is poor and the condition that sticks up limit and laminating face strip easily takes place around the package edge. Along with the continuous improvement of the service performance of cables in the prior art, higher requirements are put on the service performance of the mica tape, and the mica tape with better heat dissipation performance and better wrapping performance is produced, so that technical advantages are brought to enterprises.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a mica paper tape for winding so as to solve the defects in the background art.
The technical problems solved by the utility model are realized by adopting the following technical scheme:
the mica paper tape for winding comprises a substrate mica paper, wherein the upper surface of the substrate mica tape is provided with a glue layer, a first fiber fabric layer, a polyimide film and a second fiber fabric layer are sequentially formed on the surface of the glue layer, and the surface of the glue layer is sealed by surface mica paper after the surface of the second fiber fabric layer is glued; the first fiber fabric layer is an alkali-free glass fiber fabric layer, and the second fiber fabric layer is a net surface reinforced fiber fabric layer; the polyimide film is provided with hollowed holes, and the hollowed holes are used as interface connecting channels of the first fiber fabric layer and the second fiber fabric layer.
As a further limitation, the thickness of the surface layer mica paper is 1-2 times that of the base mica paper; and the sum of the thicknesses of the surface layer mica paper and the substrate mica paper accounts for 50-70% of the total thickness of the mica paper tape for winding.
As a further limitation, the hollowed-out holes on the polyimide film are straight holes or oblong holes, the hole width is 1-2 mm, and the hole length is 10-15 mm.
By way of further limitation, the web-side reinforcing fiber fabric layer is preferably an acetate web or an aramid fiber web having a thickness of 0.08 to 0.2 mm.
As a further limitation, the mesh aperture on the mesh-side reinforcing fiber fabric layer is 3 to 5mm.
As a further limitation, a heat conduction enhancement layer is formed between the mesh reinforced fiber fabric layer and the polyimide film, and the heat conduction enhancement layer is formed by filling inorganic heat conduction particles.
As a further limitation, a tensile fiber reinforcing layer is formed between the mesh reinforced fiber fabric layer and the polyimide film, and the tensile fiber reinforcing layer is formed by filling chopped aramid fibers.
The beneficial effects are that: the mica tape for winding is filled in a mica paper structure by utilizing the double-fiber fabric layers, the tensile property, the laminating property and the structural stability of the mica tape are improved by utilizing the performance difference between the double-fiber fabric layers, and insulation assistance is performed by utilizing the polyimide film between the double-fiber fabric layers, so that the mica tape body has better tensile and surface laminating properties under the condition of ensuring the main insulation property of the mica tape, the outer edge is not easy to curl and warp, and the interface adhesive force of the mica tape can be effectively improved, so that the laminating and wrapping properties of the mica tape product prepared by the mica tape on the surface of a corresponding device are ensured.
Drawings
FIG. 1 is an enlarged schematic view of a longitudinal section detail of a preferred embodiment of the utility model.
Wherein: 1. surface layer mica paper; 2. a first adhesive layer; 3. a second fibrous fabric layer; 4. a structural reinforcement layer; 5. a second adhesive layer; 6. a polyimide film; 7. a third adhesive layer; 8. a first fibrous fabric layer; 9. a fourth adhesive layer; 10. a basal mica paper.
Detailed Description
The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.
Referring to a preferred embodiment of a mica paper tape for winding in fig. 1, in this embodiment, the mica paper tape for winding is mainly used for insulating and winding wires, and comprises a base mica paper 10 and a surface mica paper 1 as insulating structures, wherein the base mica paper 10 and the surface mica paper 1 are both in a single-layer mica paper structure, the forming thickness of the base mica paper 10 is 0.2mm, and the forming thickness of the surface mica paper 1 is 0.3mm, so that surface sealing is performed on the upper surface and the lower surface of the formed mica paper tape.
An interlayer space is formed between the substrate mica paper 10 and the surface layer mica paper 1, and a composite reinforcing layer is fixedly formed in the interlayer space by a multi-layer adhesive structure, and the composite reinforcing layer is mainly used for improving the structural strength, stability, tensile resistance and surface laminating performance of the finished mica tape.
The composite reinforcing layer comprises a first fiber fabric layer 8, in this embodiment, the first fiber fabric layer 8 is an alkali-free glass fiber fabric layer with the thickness of 0.08mm, the two side surfaces of the first fiber fabric layer 8 are respectively formed with a third adhesive layer 7 and a fourth adhesive layer 9, and the first fiber fabric layer 8 is adhered to the inner surface of the basal mica paper 10 through the fourth adhesive layer 9. A polyimide film 6 with the thickness of 0.045mm is formed on the surface of the third adhesive layer 7, the surface of the polyimide film 6 is provided with lattice hollowed-out holes, the hollowed-out holes on the polyimide film are straight holes, the hole width is 1.5mm, and the hole length is 10mm; the area ratio of the hollowed holes in the unit area of the polyimide film 6 is 15%, and the lattice hollowed holes in the polyimide film 6 are beneficial to forming a cross-linked structure on the adhesive layers on the two side surfaces of the polyimide film 6.
The polyimide film 6 has formed on its surface a second fibrous web layer 3, which second fibrous web layer 3 in this embodiment is an aramid fiber web having a thickness of 0.10mm and a mesh of square holes having a pore diameter of 3 to 5mm, and the second fibrous web layer 3 can be used in combination with the first fibrous web layer 8 to obtain a fibrous laminate structure to obtain more excellent tensile and tensile properties than a single-layer fibrous web reinforcing layer.
In this embodiment, a heat conduction enhancement layer is further formed between the second fiber fabric layer 3 and the polyimide film 6 as the structural enhancement layer 4, and the heat conduction enhancement layer is formed by filling organic heat conduction particles, and the inorganic heat conduction particles selected in this embodiment are nano-scale boron nitride particles; in other embodiments, the structural reinforcement layer 4 may be a tensile fiber reinforcement layer, and the tensile fiber reinforcement layer may be obtained by filling the position of the structural layer with chopped aramid fibers.
The second fiber fabric layer 3 is formed with a surface layer mica paper 1 on the upper surface, and the surface layer mica paper 1 and the second fiber fabric layer 3 are adhered and formed through the first adhesive layer 2.
In this embodiment, the mica paper tape for winding finished product includes a plurality of adhesive structural layers formed by epoxy silicone resin adhesive as interlayer connection structures, namely a first adhesive layer 2, a second adhesive layer 5, a third adhesive layer 7 and a fourth adhesive layer 9, wherein the first adhesive layer 2 and the fourth adhesive layer 9 are directly formed by spraying, the forming thickness is not more than 0.06mm, the second adhesive layer 5 is directly sprayed on two side surfaces of the corresponding polyimide film 6, and after the interlayer structures are compounded, the two sides of the polyimide film 6 are hot pressed and are compounded through pressure to form a cross-linked structure, so that the mica paper tape has stronger structural stability.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The mica paper tape for winding is characterized by comprising base mica paper, wherein the upper surface of the base mica tape is provided with a glue layer, a first fiber fabric layer, a polyimide film and a second fiber fabric layer are sequentially formed on the surface of the glue layer, and the surface of the glue layer is sealed by surface mica paper after the surface of the second fiber fabric layer is glued; the first fiber fabric layer is an alkali-free glass fiber fabric layer, and the second fiber fabric layer is a net surface reinforced fiber fabric layer; the polyimide film is provided with hollowed holes, and the hollowed holes are used as interface connecting channels of the first fiber fabric layer and the second fiber fabric layer.
2. The mica paper tape for winding of claim 1, wherein the thickness of the surface mica paper is 1-2 times the thickness of the base mica paper; and the sum of the thicknesses of the surface layer mica paper and the substrate mica paper accounts for 50-70% of the total thickness of the mica paper tape for winding.
3. The mica paper tape for winding according to claim 1, wherein the hollowed-out holes on the polyimide film are straight holes or oblong holes, the hole width is 1-2 mm, and the hole length is 10-15 mm.
4. The mica paper tape for winding of claim 1 wherein the web reinforced fiber fabric layer is formed from an acetate web or an aramid fiber web having a thickness of 0.08 to 0.2 mm.
5. The winding mica paper tape as in claim 1 wherein the mesh size on the web reinforced fiber fabric layer is 3 to 5mm.
6. The mica paper tape for winding of claim 1, wherein a heat conduction enhancing layer is formed between the mesh reinforced fiber fabric layer and the polyimide film, and the heat conduction enhancing layer is formed by filling inorganic heat conduction particles.
7. The mica paper tape for winding of claim 1, wherein a tensile fiber reinforcement layer is formed between the mesh reinforcement fiber fabric layer and the polyimide film, and the tensile fiber reinforcement layer is formed by filling chopped aramid fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320467093.3U CN219832324U (en) | 2023-03-13 | 2023-03-13 | Mica paper tape for winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320467093.3U CN219832324U (en) | 2023-03-13 | 2023-03-13 | Mica paper tape for winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219832324U true CN219832324U (en) | 2023-10-13 |
Family
ID=88280203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320467093.3U Active CN219832324U (en) | 2023-03-13 | 2023-03-13 | Mica paper tape for winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219832324U (en) |
-
2023
- 2023-03-13 CN CN202320467093.3U patent/CN219832324U/en active Active
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