CN117210124A - Coating treatment liquid for preparing heat-insulating mica tube, coating, heat-insulating mica tube and preparation method and application of heat-insulating mica tube - Google Patents
Coating treatment liquid for preparing heat-insulating mica tube, coating, heat-insulating mica tube and preparation method and application of heat-insulating mica tube Download PDFInfo
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- CN117210124A CN117210124A CN202311106959.9A CN202311106959A CN117210124A CN 117210124 A CN117210124 A CN 117210124A CN 202311106959 A CN202311106959 A CN 202311106959A CN 117210124 A CN117210124 A CN 117210124A
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- 239000010445 mica Substances 0.000 title claims abstract description 106
- 229910052618 mica group Inorganic materials 0.000 title claims abstract description 106
- 239000011248 coating agent Substances 0.000 title claims abstract description 82
- 238000000576 coating method Methods 0.000 title claims abstract description 82
- 239000007788 liquid Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 57
- 239000011325 microbead Substances 0.000 claims abstract description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 239000004964 aerogel Substances 0.000 claims abstract description 11
- 229920002050 silicone resin Polymers 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 8
- -1 vinyl phenyl Chemical group 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims 1
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 40
- 239000000463 material Substances 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 19
- 239000002994 raw material Substances 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 125000000449 nitro group Chemical class [O-][N+](*)=O 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000004965 Silica aerogel Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009718 spray deposition Methods 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229940081330 tena Drugs 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The application relates to the technical field of mica materials, and particularly discloses a coating treatment liquid for preparing a heat-insulating mica tube, a coating, the heat-insulating mica tube, and a preparation method and application of the heat-insulating mica tube. The application discloses a coating treatment liquid which comprises the following components in parts by weight: 25-35 parts of aerogel powder, 15-35 parts of microbead powder, 5-15 parts of glass powder and 35-45 parts of organic silicon resin. The application also discloses a coating prepared by using the coating treatment liquid, a heat-insulating mica tube and application thereof. The heat-insulating mica tube is obtained by coating the surface of the mica tube matrix with the coating treatment liquid disclosed by the application, and the prepared heat-insulating mica tube has excellent apparent characteristics, excellent normal voltage resistance, excellent fire resistance and excellent heat insulation performance.
Description
Technical Field
The application relates to the technical field of mica materials, in particular to a coating treatment liquid for preparing a heat-insulating mica tube, a coating, the heat-insulating mica tube and a preparation method and application thereof.
Background
With the integrated development of large-scale motors, mica materials have the electrical properties of high electrical strength, low dielectric loss, high surface resistance and high volume resistance, and are widely used in cables and large-scale electromechanical equipment.
At present, a main insulation structure of mica materials is developed in a thinner and more advanced direction, insulation thinning is favorable for increasing the single-machine capacity of a motor, the manufacturing cost of windings is reduced, the market competitiveness of high-voltage motor products is improved, and the reduction of the thickness of the insulation structure brings higher requirements on the size and physical and chemical properties of mica tube materials.
Mica tubes in the market are mainly produced by rolling mica paper, and the mica material has a general heat insulation performance under a high-temperature condition because the mica parent body is a semi-heat insulation material, so that the heat insulation performance of the prepared mica tube is poor. Therefore, a new preparation method is needed to solve the above problems.
Disclosure of Invention
In order to solve the technical problems and improve the heat insulation performance of the mica tube, the application provides a coating treatment liquid for preparing the heat insulation mica tube, a coating, the heat insulation mica tube and a preparation method and application thereof.
In a first aspect, the application provides a coating treatment fluid for preparing a heat-insulating mica tube, which comprises the following components in parts by weight: 25-35 parts of aerogel powder, 15-35 parts of microbead powder, 5-15 parts of glass powder and 35-45 parts of organic silicon resin.
The application uses aerogel powder, bead powder, glass powder and organic silicon resin with specific weight parts as coating treatment liquid for preparing the heat-insulating mica tube, and the heat-insulating mica tube is prepared by spraying the coating treatment liquid on a mica tube matrix, and the prepared heat-insulating mica tube sample has no defect in surface and excellent voltage resistance, fire resistance and heat insulation performance.
The aerogel powder, the microbead powder and the glass powder can fill the pores among the fine particles of the coating treatment liquid, and are mutually matched in a synergistic manner, so that the compactness of the system is improved, and the heat insulation performance of the coating can be obviously improved; the organic silicon resin has a very flexible main chain, weak intermolecular acting force, proper viscosity, weak surface tension, small surface energy and strong film forming capability, so that the apparent structure of the coating treatment liquid after spray forming is good.
Inorganic materials and organic materials in the coating treatment liquid can be well combined with the surface of the mica tube matrix, and the high-temperature insulation performance of the mica tube is improved through interaction; the coating treatment liquid can improve the performance of the mica tube, improve the high-temperature insulation performance of the mica tube, and finally obtain the mica tube with good high-temperature insulation performance and excellent heat insulation performance.
Preferably, the coating treatment liquid comprises the following components in parts by weight: 25-35 parts of aerogel powder, 15-25 parts of microbead powder, 5-15 parts of glass powder and 35-45 parts of organic silicon resin.
Further, the coating treatment liquid comprises the following components in parts by weight: 30 parts of aerogel powder, 20 parts of microbead powder, 10 parts of glass powder and 40 parts of organic silicon resin.
As shown by experimental analysis, the granularity of each component of the application is in the range, and the voltage resistance and the heat insulation performance of the heat insulation mica tube can be further improved.
Preferably, the bead powder is truly denseThe degree of the mixture is 0.20-0.57g/cm 3 。
Further, the true density of the microbead powder is 0.27-0.48g/cm 3 。
In a specific embodiment, the true density of the microbead powder may be 0.20-0.22g/cm 3 、0.27-0.30g/cm 3 、0.33-0.37g/cm 3 、0.44-0.48g/cm 3 、0.53-0.57g/cm 3 。
Preferably, the silicone resin is selected from one or more of hydroxy silicone resin RY-JJ-03, vinyl phenyl silicone resin RY-BJG-04, phenyl hydrogen-containing silicone resin RY-BJG-02, methyl silicone resin RY-ZNJ 01.
According to experimental analysis, the organic silicon resin of the type is selected, the true density of the microbead powder is controlled within the range, and the voltage resistance and the heat insulation performance of the heat insulation mica tube can be further improved.
The preparation method of the coating treatment liquid specifically comprises the following steps: and mixing the raw materials in parts by weight, and stirring at a speed of not less than 500rpm for not less than 60min to obtain the coating treatment liquid.
In the preparation process of the coating treatment liquid, when the stirring speed is lower than 500rpm or the stirring time is lower than 60min, the treatment uniformity is poor, the additive material cannot be uniformly stirred, and the prepared product has unstable performance; according to the application, the stirring speed and stirring time in the preparation process of the coating treatment liquid are optimized, and the obtained coating treatment liquid is excellent in uniformity, so that the subsequent preparation of the heat-insulating mica tube is facilitated.
In a second aspect, the application provides a coating, which is prepared by using the coating treatment liquid for preparing the heat-insulating mica tube.
In a third aspect, the present application provides a thermally insulated mica pipe comprising a mica pipe substrate and a coating as described above.
Preferably, the thickness of the coating is 80.+ -.10. Mu.m.
In a fourth aspect, the application provides a method for preparing the heat-insulating mica tube, which specifically comprises the following steps:
spraying the coating treatment liquid for preparing the heat-insulating mica tube on the surface of the mica tube matrix, and after spraying, placing the mica tube matrix at 120-140 ℃ until the coating is dried, thus obtaining the heat-insulating mica tube;
preferably, the conditions of the spraying are: the spraying temperature is 80-100deg.C, and the pressure is 32-38psi.
When the coating treatment liquid is sprayed on the surface of the mica tube matrix, if the spraying temperature is too low or the pressure is too low, the binding force between the coating treatment liquid and the surface of the matrix is weak, and the coating treatment liquid does not form a dry coating on the surface of the matrix yet, namely, the phenomenon of falling occurs; if the spraying temperature is too high or the spraying pressure is too high, the coating treatment liquid is not fully combined with the surface of the substrate, the phenomenon of self drying occurs, or the surface of a finished mica tube product is easy to have the adverse phenomena of fuzzing, powder falling and the like.
In a fifth aspect, the application provides an application of the coating treatment liquid or the heat-insulating mica tube in preparing a fireproof heat-insulating material.
In summary, the technical scheme of the application has the following effects:
according to the application, aerogel powder, bead powder, glass powder and organic silicon resin with specific weight parts are used as coating treatment liquid, and the surface of the heat-insulating mica tube product prepared by spraying the coating treatment liquid on the surface of a mica tube substrate has no defects, and is excellent in voltage resistance, fire resistance and heat insulation performance.
The preparation method of the heat-insulating mica tube is simple to operate, reduces the production cost, and avoids the adverse phenomena of fracture, powder falling, cracking and the like in the forming process of the heat-insulating mica tube by controlling the raw materials and specific technological parameters.
The application further improves the heat insulation performance of the heat insulation mica tube by screening the true density of the microbead powder and the types of the organic silicon resin in the coating treatment liquid.
Detailed Description
The present application is described in further detail below in conjunction with examples, comparative examples and performance test experiments, which should not be construed as limiting the scope of the application as claimed.
Preparation example
Preparation examples 1 to 11
Preparation examples 1 to 11 each provide a coating treatment liquid.
The coating treatment liquid in the above preparation example is different in that: the amounts of the components in the coating treatment solutions were varied, and are shown in Table 1.
The preparation method of the coating treatment liquid in the preparation example comprises the following steps:
according to the addition amount shown in Table 1, silica aerogel powder (KN-0683, available from Takefir Keno building materials Co., ltd.) and microbead powder (YN 35, true density 0.33-0.37g/cm were taken 3 The coating treatment liquid was prepared by mixing glass frit (800 mesh, from Ind. Nanotechnology Co., ltd.) and silicone resin (hydroxy silicone resin RY-JJ-03, from Jiangxi Nitro New Material Co., ltd.) at 500rpm for 60 min.
TABLE 1 amounts of the components in the coating treatment solutions of preparation examples 1 to 11
Preparation examples 12 to 21
Preparation examples 12 to 21 each provide a coating treatment liquid.
The difference between the above preparation examples and preparation example 2 is specifically:
in preparation example 12: the silicone resin was vinyl phenyl silicone resin RY-BJG-04, available from Jiangxi Ri Yuan New Material Co.
In preparation example 13: the silicone resin was phenyl hydrogen-containing silicone resin RY-BJG-02, available from Jiangxi Nitro New Material Co.
In preparation example 14: the silicone resin was methyl silicone resin RY-ZNJ01, available from Jiangxi Nitro New Material Co.
In preparation example 15: the microbead powder is YN20, and the true density is 0.20-0.22g/cm 3 Purchased from Guangzhou Yuan New Material Co.
In preparation example 16: the microsphere powder is YN28, and has a true density of 0.27-0.30g/cm 3 Purchased from Guangzhou Yuan New Material Co.
In preparation example 17: the microbead powder is YN46, and has a true density of 0.44-0.48g/cm 3 Purchased from Guangzhou Yuan New Material Co.
In preparation example 18: the microbead powder is YN55 with true density of 0.53-0.57g/cm 3 Purchased from Guangzhou Yuan New Material Co.
In preparation example 19: silicone resin was replaced with a silicone rubber emulsion (model 5468, available from Shenzhen Shengshan silicone rubber materials science and technology Co., ltd.).
In preparation example 20: glass frit (800 mesh, available from middle-Anter nanotechnology Co., ltd.) was used instead of the microbead powder.
In preparation example 21: ceramic powder (800 mesh, available from the well An Tena m technology) was used instead of microbead powder.
Examples
Examples 1 to 10
Examples 1-10 provide an insulated mica tube, respectively.
The above-described embodiments differ in that: the sources of the coating treatment solutions were varied and are shown in table 2.
The preparation method of the heat insulation mica tube in the embodiment comprises the following specific steps:
and taking a mica tube (specification and model are HP-5, and are from the electric equipment Co., ltd.) as a matrix, spraying a coating treatment liquid at the spraying temperature of 90 ℃ and the pressure of 35psi, and then drying the coating at 130 ℃ to obtain the heat-insulating mica tube with the thickness of 80+/-10 mu m.
TABLE 2 sources of coating treatment fluids in examples 1-10
Comparative example
Comparative examples 1 to 11
Comparative examples 1-11 each provide a mica tube.
The above comparative example is different from example 1 in that: the sources of the coating treatment solutions were varied, and are shown in Table 3. The above comparative example was the same as the preparation method of the mica tube in example 1.
TABLE 3 Source of coating treatment fluids in comparative examples 1-11
Comparative example 12
This comparative example provides a common mica tube.
The mica tube specification model of this comparative example was HP-5, which was from the Utility model electric power plant Inc. of Yangzhou
Performance test the following performances of mica pipes were measured using the mica pipes provided in examples 1 to 10 and comparative examples 1 to 12 as test subjects.
(1) Appearance characteristics: and observing whether the surface of the heat-insulating mica tube product is flat, and whether the defects such as powder, cracks, bubbles, pits and the like exist.
(2) Bond strength: the bond strength of the coating to the mica tube substrate was tested according to ASTM C633-2013, "standard test method for adhesion or bond strength of thermal spray coatings".
(3) Normal voltage resistance: reference is made to part 2 of national standard GB/T5019.2-2009 "insulating material based on mica": the test method is used for detecting the normal voltage resistance of the cable, and the normal voltage resistance can represent the insulation performance of the cable.
(4) Fire resistance: the fire resistance of the insulated mica tube was examined by the method specified in GBT 19216.11-2003.
(5) Heat insulation: referring to a testing method of GB/T25352-2010 heat-insulating and sound-insulating material burn-through-resistant testing method, one side of a heat-insulating mica tube is burned by flame at 1000 ℃ and the temperature of the other side is detected; the heat insulation calculation formula is: heat insulation= (1000-R)/1000×100%, wherein the firing temperature of the mica tube side is 1000 ℃; r (DEG C) represents the temperature of the other side of the mica tube.
Detection result: as shown in table 4.
TABLE 4 results of Performance measurements of heat insulating mica pipes in examples 1-10 and comparative examples 1-12
By combining the properties of the heat insulation mica pipes in comparative examples 1-10 and comparative examples 1-12, it is known that the heat insulation mica pipe is obtained by coating the surface of a mica pipe matrix with specific parts by weight of aerogel powder, bead powder, glass powder and organic silicon resin as coating treatment liquid, the surface of a sample is defect-free, the bonding strength of the coating and the mica pipe matrix is 70-83MPa, the normal electrical resistance of the heat insulation mica pipe is 60-66Mv/mm, the fire resistance is 805-855 ℃, and the heat insulation property is 70.7-80.2%. The detection result shows that the product prepared by using the coating treatment liquid provided by the application as the coating of the mica tube has no defect on the surface, the coating has strong bonding force with the surface of the mica tube matrix, and the coating has excellent voltage resistance, fire resistance and heat insulation.
From the detection results of comparative examples 1 to 3 and comparative examples 1 to 8, it is known that the addition ratio of each raw material in the coating treatment liquid has a great influence on the apparent characteristics of the subsequent heat-insulating mica tube and the performance of the heat-insulating mica tube; when the proportion of raw materials is too large or too small, the heat-insulating mica tube is easy to have the defects of powder falling, pitting, rough surface and the like, and the prepared heat-insulating mica tube is poor in normal voltage resistance, fire resistance and heat insulation.
From the results of the comparison of example 1 and comparative example 9, it is understood that when a silicone rubber emulsion is selected to be added to the coating treatment liquid instead of the silicone resin, the heat-insulating mica tube is inferior in fire resistance and heat insulation; the organic silicon resin is selected as the raw material component of the coating treatment liquid, and the prepared heat-insulating mica tube has excellent normal voltage resistance, fire resistance and heat insulation. Further, according to the detection results of comparative examples 1 and 4 to 6, the present application can further improve the fire resistance and heat insulation of the heat insulation mica tube by screening the type of the silicone resin as the hydroxy silicone resin RY-JJ-03.
From the results of the comparison of example 1 with comparative examples 10 to 11, it is understood that when glass powder or ceramic powder is selected to be used instead of bead powder to be added to the coating treatment liquid, the heat-insulating mica tube is inferior in fire resistance and heat insulation; the application selects the microbead powder as the raw material component of the coating treatment liquid, and the prepared heat-insulating mica tube has excellent normal voltage resistance, fire resistance and heat insulation. Further, the present application controls the true density of the microbead powder to 0.27-0.48g/cm by comparing the detection results of example 1 and examples 7-10 3 The voltage resistance and the fire resistance of the heat insulation mica tube are further improved.
While the application has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the application and are intended to be within the scope of the application as claimed.
Claims (10)
1. The coating treatment fluid for preparing the heat-insulating mica tube is characterized by comprising the following components in parts by weight: 25-35 parts of aerogel powder, 15-35 parts of microbead powder, 5-15 parts of glass powder and 35-45 parts of organic silicon resin.
2. The coating treatment fluid for preparing the heat-insulating mica tube according to claim 1, comprising the following components in parts by weight: 25-35 parts of aerogel powder, 15-25 parts of microbead powder, 5-15 parts of glass powder and 35-45 parts of organic silicon resin.
3. The coating treatment fluid for preparing the heat-insulating mica tube according to claim 2, comprising the following components in parts by weight: 30 parts of aerogel powder, 20 parts of microbead powder, 10 parts of glass powder and 40 parts of organic silicon resin.
4. The coating treatment liquid for preparing an insulated mica tube according to claim 1, wherein the true density of the microbead powder is 0.20-0.57g/cm 3 。
5. The coating treatment fluid for preparing the heat-insulating mica pipe according to claim 1, wherein the organic silicone resin is one or more selected from the group consisting of hydroxy silicone resin RY-JJ-03, vinyl phenyl silicone resin RY-BJG-04, phenyl hydrogen-containing silicone resin RY-BJG-02, methyl silicone resin RY-ZNJ.
6. A coating layer characterized by being prepared by using the coating treatment liquid for preparing the heat-insulating mica tube according to any one of claims 1 to 5.
7. A heat-insulating mica pipe comprising a mica pipe substrate and the coating of claim 6.
8. The insulated mica pipe of claim 7 wherein the coating has a thickness of 80±10 μm.
9. The method for preparing the heat-insulating mica tube according to any one of claims 7 to 8, comprising the following steps:
spraying the coating treatment liquid for preparing the heat-insulating mica tube according to any one of claims 1-5 on the surface of the mica tube matrix, and after spraying, drying the coating at 120-140 ℃ to obtain the heat-insulating mica tube;
the spraying conditions are as follows: the spraying temperature is 80-100deg.C, and the pressure is 32-38psi.
10. Use of a coating treatment fluid according to any one of claims 1 to 5 for the preparation of a heat insulating mica pipe or of a heat insulating mica pipe according to any one of claims 7 to 8 for the preparation of a fire resistant heat insulating material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311106959.9A CN117210124A (en) | 2023-08-30 | 2023-08-30 | Coating treatment liquid for preparing heat-insulating mica tube, coating, heat-insulating mica tube and preparation method and application of heat-insulating mica tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311106959.9A CN117210124A (en) | 2023-08-30 | 2023-08-30 | Coating treatment liquid for preparing heat-insulating mica tube, coating, heat-insulating mica tube and preparation method and application of heat-insulating mica tube |
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