CN103236292B - Mica tape - Google Patents
Mica tape Download PDFInfo
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- CN103236292B CN103236292B CN201310139940.4A CN201310139940A CN103236292B CN 103236292 B CN103236292 B CN 103236292B CN 201310139940 A CN201310139940 A CN 201310139940A CN 103236292 B CN103236292 B CN 103236292B
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- mica tape
- aromatic polyamide
- paper
- mica
- polyamide paper
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention relates to an electric insulation material, particularly relates to a mica tape, and solves the technical problem that the performance and the service life of a motor are influenced by the poor main insulation soaking performance of a motor winding. The mica tape is produced through the following steps of (a) longitudinally fixing 160 to 250 branches of 2 to 4-share fiber yarns with the surface being treated by a treating agent on the upper surface of a piece of aromatic polyamide fiber paper; (b) uniformly coating adhesive on the upper surface of the aromatic polyamide fiber paper with the fiber yarns, and prebaking the aromatic polyamide fiber paper; (c) compounding a piece of mica paper onto the upper surface of the prebaked polyamide fiber paper with the fiber yarns, and carrying out a secondary baking, a third baking and a fourth baking; and (d) rolling the mica paper and the fiber paper, which are already subjected to the fourth baking, to obtain the mica tape. The mica tape has high heat conductivity, heat resistance, moisture resistance, electrical performance, mechanical strength and soaking performance, and the operation reliability and the service life of a high-voltage motor can be improved and prolonged.
Description
Technical field
The present invention relates to electrical insulating material, be specially a kind of mica tape.
Background technology
Mica tape be big-and-middle-sized high-voltage generator, high-tension motor, track traffic traction motor, metallurgy, mine and oil exploitation motor, wind-driven generator winding must irreplaceable main insulation material.Motor winding is called the heart of motor by insider, motor winding is the coil being made up definite shape of the copper conductor with insulation, mica tape according to difference wrapped certain number of plies on coil of electric moter voltage forms main insulation, the damage more than 90% having data display motor winding to be in operation is that the damage of its insulation causes, and therefore winding insulation is then most important most critical part in heart.Mica tape is that supporting material and mica paper are bonded together through cutting into banded insulating material by adhesive.Used supporting material mainly divides two kinds: film (polyester film, polyimide film) and alkali-free glass cloth.With multi layer cloud master tape for having a large amount of air-gaps in main formation motor winding main insulation, the existence of air-gap will cause that the moisture absorption of mica tape increases, thermal conductivity reduces greatly, increase the temperature rise of motor, increase dielectric loss, make motor generation thermal breakdown, air-gap also will reduce partial discharge voltage, increase the premature breakdown that partial discharge electricity causes whole insulating barrier, reduce the useful life of motor.For the air-gap eliminated in insulating barrier will through vacuum pressure impregnation, the air-gap in winding main insulation is filled with insulating varnish, form a fine and close insulating barrier, to improve the thermal conductivity of insulating barrier, thermal endurance, moisture resistance, electric property and mechanical strength, therefore, mica tape saturating machine except having good thermal endurance, electric property, mechanical strength is also the key performance of mica tape.Take alkali-free glass cloth as the mica tape of supporting material, glass is furnished with many meshes, and after dipping, these mesh insulating varnish is filled discontented, and make the electric property of mica tape relatively poor, glass fibre is smooth cylindrical fiber, does not have pore, can not suck insulating varnish; Be the mica tape of supporting material with film, because the structure of film is very fine and close, smooth surface and do not have pore, insulating varnish can not through film, during vacuum pressure impregnation, insulating varnish needs to enter whole insulating barrier from the seam crossing of mica tape, make dip time longer, can't guarantee to soak into thoroughly to eliminate air-gap completely, have influence on the performance and used life of motor.Therefore need a kind of saturating machine good and electric property meets the motor winding insulating material that relevant criterion requires.
For convenience of description the direction parallel with production line traffic direction is called longitudinal direction, the direction vertical with the production line direction of motion is called transverse direction.
Summary of the invention
The present invention solves the main insulation saturating machine difference of current motor winding and then affects the technical problem of performance and used life of motor, provides a kind of mica tape.
The present invention realizes by the following technical solutions: a kind of mica tape, described mica tape is adopted and is made with the following method: (a) longitudinally fixing many 160 ~ 250 2 ~ 4 bursts of surfaces are through the silvalin of coupling agent treatment at the upper surface of aromatic polyamide paper, and described silvalin is alkali-free glass fibre yarn or aromatic polyamide fibre yarn; Described silvalin is laterally evenly distributed on aromatic polyamide paper, and arranging density is 3 ~ 5/10mm; B () evenly coats adhesive at the upper surface of the aromatic polyamide paper being fixed with silvalin; Then carry out prebake, stoving temperature is 50 ± 2 DEG C, and the time of curing is 3 ~ 5min; (c) mica paper was compound to bake and bank up with earth in advance and be fixed with the upper surface of the aromatic polyamide paper of silvalin, carry out second and cure, temperature is 50 ± 2 DEG C, and the time of curing is 3 ~ 8min; Carry out the 3rd road afterwards to cure, stoving temperature is 60 ~ 70 DEG C, and the time of curing is 5 ~ 10min, and finally carry out the 4th road and cure, stoving temperature 70 ~ 80 DEG C, the time of curing is 3 ~ 6min; D the surface adhesion cured through the 4th road has the aromatic polyamide paper of mica paper to carry out roll extrusion by (), namely obtain mica tape; The indicated weight of described mica paper is 60 ~ 180g/m
2, thickness 0.04 ~ 0.11mm, described adhesive is high-temperature resistant organic silicon resin, and the mass fraction that the content of adhesive accounts for whole mica tape is 5% ~ 11%; The thickness of aromatic polyamide paper is 0.025mm ~ 0.07mm, and indicated weight is 18g/m
2~ 70 g/m
2.
Described Nomex is a kind of special chemical fiber, not only has excellent physical and mechanical properties, also has good thermal stability, anti-flammability, electrical insulating property and radiation resistance, is often used in electrical equipment and electrical field; Aromatic polyamide paper take Nomex as raw material, through the paper that wet papermaking is produced, has the good characteristic of Nomex.Longitudinally silvalin is placed with at the upper surface of aromatic polyamide paper; Supporting material in described silvalin Chang Zuowei insulating material production, the thickness weaving term of silvalin " props up " and " stock " describes, described " " refers to the length of 1 gram of fiber spun yarn, and as 160 represent that 1 gram of fiber is spun into the yarn of 160 meters long, the fineness of such yarn is just named 160; The silvalin of 160 2 strands refers to the silvalin twiddled by the single thread of two strands 160.The yarn of such thickness and arrangement density significantly can strengthen the electric property of mica tape, and ensure that the mechanical performance of mica tape meets related request.Described coupling agent is the conventional surface conditioning agent in this area, can the surface property of reinforcing material, makes material obtain good surface quality and machinery, heat and electrical property; Described surface treatment method is known in those skilled in the art.Coat adhesive (high-temperature resistant organic silicon resin) on the aromatic polyamide paper surface being fixed with silvalin, and carry out preliminary drying training, be convenient to mica paper to be compounded in fibrous paper like this; Second cures and can dry majority of organic solvent contained in adhesive; Again after the 3rd, the 4th road cures, just can by mica paper and aromatic polyamide paper tight bond.Eventually pass roll extrusion, just obtain the mica tape with excellent electric property, mechanical strength and saturating machine.High-temperature resistant organic silicon resin content used and cure for four steps that high-temperature resistant organic silicon resin adopts and often step cure used temperature and time, can guarantee that mica paper and silvalin and aromatic polyamide paper bond more tight; Adopt the thickness of described mica paper, fibrous paper and indicated weight (and quality of unit length) just can make and there is good combination property and the mica tape that can meet the requirement of insulating material correlated performance.The hot strength of described mica tape is 80 ~ 100N/10mm, after dipping, electrical strength is 50KV/mm, exceeding with glass cloth is supporting material mica tape electrical strength 12KV/mm, with be that supporting material mica tape is suitable with film, same insulation thickness dip time approximately can save 1/3 ~ 1/2, dielectric loss and increment thereof are all that the mica tape of supporting material is low by 5% ~ 8% than polyimide film or alkali-free glass cloth, hanging paint amount and curing degree after vacuum pressure impregnation all exceeds with about 4% ~ 8% of the mica tape of film or glass cloth reinforcement, illustrate that mica tape saturating machine of the present invention is very good.The class of insulation and polyimide film are all 220 grades mutually.The all technical of mica tape reaches and exceedes the correlated performance requirement of GB GB/T5019-2009 " taking mica as the insulating material of base ".
Further, described aromatic polyamide paper is the aromatic polyamide paper of the non-calendering in surface.The aromatic polyamide paper of the non-calendering in surface is easier to the fixing of silvalin and the compound with mica paper.
Mica tape of the present invention has excellent electric property and mechanical strength, very soft, there is good Wrapping technical, thermal endurance class is up to 220 grades, after vacuum pressure impregnation, paint absorption capacity is large, effectively can fill the air-gap in motor insulating layer within a short period of time and the insulating barrier of the integration of formation densification, there is very high thermal conductivity, thermal endurance, moisture resistance, electric property and mechanical strength, improve operational reliability and the useful life of high-voltage motor.The present invention is applicable on the motor winding of big-and-middle-sized high-voltage generator, high-tension motor, track traffic traction motor, metallurgy, mine and oil exploitation motor, wind-driven generator.
Embodiment
A kind of mica tape, described mica tape is adopted and is made with the following method: (a) aromatic polyamide paper upper surface longitudinally fixing many 160 ~ 250(can select 160,180,170,190,200,250,210,230,220,260,240) 2 ~ 4(can select 2,3,4 strands) stock surface is through the silvalin of coupling agent treatment, described silvalin is alkali-free glass fibre yarn or aromatic polyamide fibre yarn; Described silvalin is evenly distributed in the transverse direction of aromatic polyamide paper, arranging density be 3 ~ 5/10mm(can select 4/10mm, 3/10mm, 5/10mm); B () evenly coats adhesive at the upper surface of the aromatic polyamide paper being fixed with glass fiber yarn; Then carry out prebake, stoving temperature is 50 ± 2 DEG C (can select 49 DEG C, 50 DEG C, 48 DEG C, 52 DEG C, 51 DEG C), and the time of curing is that 3 ~ 5min(can select 3 min, 4 min, 5 min); (c) mica paper was compound to bake and bank up with earth in advance and be fixed with the upper surface of the aromatic polyamide paper of silvalin, carry out second to cure, temperature is 50 ± 2 DEG C (can select 48 DEG C, 50 DEG C, 49 DEG C, 52 DEG C, 51 DEG C), and the time of curing is that 3 ~ 8min(can select 4 min, 3 min, 5 min, 6 min, 8 min, 7 min); Carry out the 3rd road afterwards to cure, stoving temperature is 60 ~ 70 DEG C (can select 60 DEG C, 62 DEG C, 66 DEG C, 64 DEG C, 70 DEG C, 68 DEG C), the time of curing is that 5 ~ 10min(can select 6 min, 5 min, 7 min, 9 min, 8 min, 10 min), finally carry out the 4th road to cure, stoving temperature 70 ~ 80 DEG C (72 DEG C, 70 DEG C, 74 DEG C, 76 DEG C, 80 DEG C, 78 DEG C can be selected), the time of curing is that 3 ~ 6min(can select 3 min, 4 min, 5 min, 6 min); D the surface adhesion cured through the 4th road has the aromatic polyamide paper of mica paper to carry out roll extrusion by (), namely obtain mica tape; The indicated weight of described mica paper is 60 ~ 180g/m
2(60 g/m can be selected
2, 120 g/m
2, 80 g/m
2, 100 g/m
2, 160 g/m
2, 140 g/m
2, 180 g/m
2), thickness 0.04 ~ 0.11mm(can select 0.05 mm, 0.04 mm, 0.06 mm, 0.07 mm, 0.09 mm, 0.08 mm, 0.11 mm, 0.10 mm), described adhesive is high-temperature resistant organic silicon resin, and the mass fraction that the content of adhesive accounts for whole mica tape is that 5% ~ 11%(can select 6%, 7%, 5%, 8%, 10%, 9%, 11%); The thickness of aromatic polyamide paper be 0.025mm ~ 0.07mm(can select 0.025 mm, 0.07 mm 0.040 mm, 0.055 mm), indicated weight is 18g/m
2~ 70 g/m
2(31 g/m can be selected
2, 18 g/m
2, 44 g/m
2, 70 g/m
2, 57 g/m
2).
During to the surperficial anchoring fiber yarn of aromatic polyamide paper, be that fibrous paper is come the surface of aromatic polyamide paper and fixing by the row's of employing yarn device.The non-calendering in surface of described aromatic polyamide paper.
Described coupling agent is KH560 coupling agent.Described high-temperature resistant organic silicon resin is YJ768 modified dimethyl polysiloxane resin.
The speed of production of mica tape is that 1.5m/min ~ 4.5 m/min(can select 1.5 m/min, 2.0 m/min, 2.5 m/min, 3.0 m/min, 4.0 m/min, 4.5 m/min).During actual production, be the fibrous paper of rolling is paved spread out, then by row's yarn device, silvalin be fixed in fibrous paper; Described row's yarn device is existing product, is exclusively used in and is fixed on other material surface by silvalin; Whole aromatic polyamide paper is placed on conveyer belt and processes; After coating adhesive, mica paper is compounded in aromatic polyamide paper surface; The process being coated with adhesive and the process of curing compound are carried out all on a production line continuously, therefore need to combine the speed of production that the time of curing determines whole production line, to ensure that produced product properties meets the requirement of index of correlation.After mica tape is produced, harvest plate-like, then checks, packaging, warehouse-in; Mica tape can be made different shapes, with practical requirement according to different electric equipments.
Claims (10)
1. a mica tape, it is characterized in that, described mica tape is adopted and is made with the following method: (a) longitudinally fixing many 160 ~ 250 2 ~ 4 bursts of surfaces are through the silvalin of coupling agent treatment at the upper surface of aromatic polyamide paper, and described silvalin is alkali-free glass fibre yarn or aromatic polyamide fibre yarn; Described silvalin is laterally evenly distributed on aromatic polyamide paper, and arranging density is 3 ~ 5/10mm; B () evenly coats adhesive at the upper surface of the aromatic polyamide paper being fixed with silvalin; Then carry out prebake, stoving temperature is 50 ± 2 DEG C, and the time of curing is 3 ~ 5min; (c) mica paper was compound to bake and bank up with earth in advance and be fixed with the upper surface of the aromatic polyamide paper of silvalin, carry out second and cure, temperature is 50 ± 2 DEG C, and the time of curing is 3 ~ 8min; Carry out the 3rd road afterwards to cure, stoving temperature is 60 ~ 70 DEG C, and the time of curing is 5 ~ 10min, and finally carry out the 4th road and cure, stoving temperature 70 ~ 80 DEG C, the time of curing is 3 ~ 6min; D the surface adhesion cured through the 4th road has the aromatic polyamide paper of mica paper to carry out roll extrusion by (), namely obtain mica tape; The indicated weight of described mica paper is 60 ~ 180g/m
2, thickness 0.04 ~ 0.11mm, described adhesive is high-temperature resistant organic silicon resin, and the mass fraction that the content of adhesive accounts for whole mica tape is 5% ~ 11%; The thickness of aromatic polyamide paper is 0.025mm ~ 0.07mm, and indicated weight is 18g/m
2~ 70 g/m
2.
2. mica tape as claimed in claim 1, is characterized in that described aromatic polyamide paper is the aromatic polyamide paper of the non-calendering in surface.
3. mica tape as claimed in claim 1 or 2, is characterized in that, when the surperficial anchoring fiber yarn of aromatic polyamide paper, is that alkali-free glass fibre yarn is come the surface of aromatic polyamide paper and fixing by the row's of employing yarn device.
4. mica tape as claimed in claim 1 or 2, it is characterized in that, described coupling agent is KH560 coupling agent.
5. mica tape as claimed in claim 3, it is characterized in that, described coupling agent is KH560 coupling agent.
6. mica tape as claimed in claim 1 or 2, it is characterized in that, described high-temperature resistant organic silicon resin is YJ768 modified dimethyl polysiloxane resin.
7. mica tape as claimed in claim 3, it is characterized in that, described high-temperature resistant organic silicon resin is YJ768 modified dimethyl polysiloxane resin.
8. mica tape as claimed in claim 4, it is characterized in that, described high-temperature resistant organic silicon resin is YJ768 modified dimethyl polysiloxane resin.
9. mica tape as claimed in claim 1 or 2, it is characterized in that, the speed of production of mica tape is 1.5m/min ~ 4.5m/min.
10. mica tape as claimed in claim 3, it is characterized in that, the speed of production of mica tape is 1.5m/min ~ 4.5m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310139940.4A CN103236292B (en) | 2013-04-22 | 2013-04-22 | Mica tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310139940.4A CN103236292B (en) | 2013-04-22 | 2013-04-22 | Mica tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103236292A CN103236292A (en) | 2013-08-07 |
| CN103236292B true CN103236292B (en) | 2015-06-10 |
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ID=48884326
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310139940.4A Active CN103236292B (en) | 2013-04-22 | 2013-04-22 | Mica tape |
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| CN (1) | CN103236292B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104072988B (en) * | 2014-06-18 | 2016-05-25 | 深圳昊天龙邦复合材料有限公司 | Boron nitride high heat conductive insulating material and preparation method thereof |
| CN106671513B (en) * | 2015-11-10 | 2019-05-21 | 株洲时代电气绝缘有限责任公司 | The method of mica tape and manufacture mica tape |
| CN107799241A (en) * | 2017-09-26 | 2018-03-13 | 佛山市华辉电源线材有限公司 | A kind of preparation method of ageing-resistant power line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0194974B2 (en) * | 1985-03-15 | 1996-08-28 | Schweizerische Isola-Werke | Process for manufacturing impregnatable thin mica strips containing an accelerator |
| CN202282173U (en) * | 2011-10-17 | 2012-06-20 | 金坛市华荣绝缘材料厂 | Polyimide film medium-adhesive-contented mica tape |
| CN202319160U (en) * | 2011-12-12 | 2012-07-11 | 江苏冰城电材股份有限公司 | Mica tape |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG190165A1 (en) * | 2010-11-10 | 2013-07-31 | Cogebi S A | Mica-based strip |
-
2013
- 2013-04-22 CN CN201310139940.4A patent/CN103236292B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0194974B2 (en) * | 1985-03-15 | 1996-08-28 | Schweizerische Isola-Werke | Process for manufacturing impregnatable thin mica strips containing an accelerator |
| CN202282173U (en) * | 2011-10-17 | 2012-06-20 | 金坛市华荣绝缘材料厂 | Polyimide film medium-adhesive-contented mica tape |
| CN202319160U (en) * | 2011-12-12 | 2012-07-11 | 江苏冰城电材股份有限公司 | Mica tape |
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| Publication number | Publication date |
|---|---|
| CN103236292A (en) | 2013-08-07 |
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