CN103236292A - Mica tape - Google Patents
Mica tape Download PDFInfo
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- CN103236292A CN103236292A CN2013101399404A CN201310139940A CN103236292A CN 103236292 A CN103236292 A CN 103236292A CN 2013101399404 A CN2013101399404 A CN 2013101399404A CN 201310139940 A CN201310139940 A CN 201310139940A CN 103236292 A CN103236292 A CN 103236292A
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- China
- Prior art keywords
- mica tape
- aromatic polyamide
- paper
- mica
- polyamide paper
- Prior art date
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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
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- Insulating Bodies (AREA)
- Organic Insulating Materials (AREA)
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 is the irreplaceable main insulation material that 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 be used.The motor winding is called the heart of motor by the insider, the motor winding is the coil of being made definite shape by the copper conductor that has insulation, mica tape according to difference wrapped certain number of plies on coil of electric moter voltage constitutes main insulation, the damage that has data to show that the motor winding is in operation is that the damage of its insulation causes more than 90%, so winding insulation then is most important most critical part in the 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 the multi layer cloud master tape serve as main constitute in the motor winding main insulation have a large amount of air-gaps, the existence of air-gap will cause moisture absorption increase, the thermal conductivity of mica tape to reduce greatly, increase the temperature rise of motor, increased dielectric loss, make motor generation thermal breakdown, air-gap also will reduce partial discharge voltage, increase the premature breakdown that the partial discharge electric weight causes whole insulating barrier, the useful life of having reduced motor.For the air-gap of eliminating in the insulating barrier will pass through vacuum pressure impregnation, with the air-gap in the insulating varnish filling winding main insulation, form the insulating barrier of a densification, to improve thermal conductivity, thermal endurance, moisture resistance, electric property and the mechanical strength of insulating barrier, therefore, mica tape saturating machine except having good thermal endurance, electric property, mechanical strength also is the key performance of mica tape.Be the mica tape of supporting material with the alkali-free glass cloth, glass is furnished with many meshes, and these mesh insulating varnish of dipping back are filled discontented, make the electric property of mica tape relatively poor relatively, and 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 see through film, insulating varnish need enter whole insulating barrier from the seam crossing of mica tape during vacuum pressure impregnation, make dip time longer, can't guarantee to soak into fully with thorough elimination air-gap, have influence on motor properties and useful life.So a kind of saturating machine of needs is good and electric property satisfies the motor winding insulating material that relevant criterion requires.
For convenience of description the direction parallel with the production line traffic direction is called vertically, the direction vertical with the production line direction of motion is called laterally.
Summary of the invention
The present invention solves the main insulation saturating machine difference of present motor winding and then influences motor properties and the technical problem in useful life, and a kind of mica tape is provided.
The present invention realizes by the following technical solutions: a kind of mica tape, described mica tape adopts following method to make: (a) vertically fix many 160 ~ 250 2 ~ 4 bursts surfaces through the silvalins of coupling agent treatment at the upper surface of aromatic polyamide paper, 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 coat adhesive at the upper surface of the aromatic polyamide paper that silvalin is fixedly arranged; Carry out prebake then, stoving temperature is 50 ± 2 ℃, and the time of curing is 3～5min; (c) mica paper was compound to the upper surface of baking and banking up with earth in advance and the aromatic polyamide paper of silvalin is fixedly arranged, and carried out second road and cure, temperature is 50 ± 2 ℃, and the time of curing is 3～8min; Carry out the 3rd road afterwards and cure, stoving temperature is 60～70 ℃, and the time of curing is 5～10min, carry out the 4th road at last and cure, and 70～80 ℃ of stoving temperatures, the time of curing is 3～6min; (d) will there be the aromatic polyamide paper of mica paper to carry out roll extrusion through the surface adhesion that the 4th road cures, namely obtain mica tape; The indicated weight of described mica paper is 60～180g/m
2, thickness 0.04～0.11mm, described adhesive are high-temperature resistant organic silicon resin, 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 thermal stability, anti-flammability, electrical insulating property and radiation resistance preferably, often is used in the electrical equipment and electrical field; Aromatic polyamide paper is to be raw material with the Nomex, through the paper that wet papermaking is produced, has the good characteristic of Nomex.Upper surface at aromatic polyamide paper vertically is placed with silvalin; Supporting material during described silvalin Chang Zuowei insulating material is produced, the thickness of silvalin " is propped up " with the weaving term and is reached " thigh " and describe, described " propping up " refers to the length of 1 gram fiber spun yarn, is spun into 160 meters long yarns as 160 expressions, 1 gram fiber, and the fineness of such yarn is just named 160; 160 2 strands silvalin refers to the silvalin that twiddled by two strands 160 single thread.The yarn of thickness and the density of arranging can significantly strengthen the electric property of mica tape like this, and guarantee that the mechanical performance of mica tape meets related request.Described coupling agent is this area surface conditioning agent commonly used, and surface property that can reinforcing material makes material obtain favorable 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 that silvalin is fixedly arranged, and carry out the preliminary drying training, be convenient to like this mica paper is compounded on the fibrous paper; Second road cures and can dry by the fire most of organic solvent contained in the adhesive; After curing through the 3rd, the 4th road again, just can be with mica paper and aromatic polyamide paper tight bond.Finally by crossing roll extrusion, just made the mica tape with excellent electric property, mechanical strength and saturating machine.The used content of high-temperature resistant organic silicon resin and cure and per step is cured employed temperature and time at four steps that high-temperature resistant organic silicon resin adopts can be guaranteed bonding more tight of mica paper and silvalin and aromatic polyamide paper; Adopt thickness and the indicated weight (and quality of unit length) of described mica paper, fibrous paper just can make the mica tape that has good combination property and can satisfy the requirement of insulating material correlated performance.The hot strength of described mica tape is 80～100N/10mm, dipping back electrical strength is 50KV/mm, exceeding with the glass cloth is supporting material mica tape electrical strength 12KV/mm, with be that the supporting material mica tape is suitable with the film, same insulation thickness dip time approximately can save 1/3～1/2, dielectric loss and increment thereof are the mica tape low 5%～8% of supporting material than polyimide film or alkali-free glass cloth all, hang lacquer amount and curing degree after the vacuum pressure impregnation and all exceed about 4%～8% with 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 is all 220 grades mutually with polyimide film.Every technical indicator of mica tape reaches and surpasses the correlated performance requirement of GB GB/T5019-2009 " be with the mica base insulating material ".
Further, described aromatic polyamide paper is the not aromatic polyamide paper of calendering of surface.The surface not aromatic polyamide paper of calendering is easier to the fixing of silvalin and compound with mica paper.
Mica tape of the present invention has excellent electric property and mechanical strength, very soft, good Wrapping technical is arranged, thermal endurance class is up to 220 grades, paint absorption capacity is big after the vacuum pressure impregnation, can effectively fill the air-gap in the electrical machine insulation layer within a short period of time and form fine and close integrated insulating barrier, have 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 adopts following method to make: (a) can select 160,180,170,190,200,250,210,230,220,260,240 at the vertically fixing many 160 ~ 250(of the upper surface of aromatic polyamide paper) 2 ~ 4(can select 2,3,4 strands) burst 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 laterally evenly distributed aromatic polyamide paper, and arranging density is that 3 ~ 5/10mm(can select 4/10mm, 3/10mm, 5/10mm); (b) evenly coat adhesive at the upper surface of the aromatic polyamide paper that glass fiber yarn is fixedly arranged; Carry out prebake then, stoving temperature is 50 ± 2 ℃ (can select 49 ℃, 50 ℃, 48 ℃, 52 ℃, 51 ℃), and the time of curing is that 3～5min(can select 3 min, 4 min, 5 min); (c) mica paper was compound to the upper surface of baking and banking up with earth in advance and the aromatic polyamide paper of silvalin is fixedly arranged, carrying out second road cures, temperature is 50 ± 2 ℃ (can select 48 ℃, 50 ℃, 49 ℃, 52 ℃, 51 ℃), and the time of curing is that 3～8min(can select 4 min, 3 min, 5 min, 6 min, 8 min, 7 min); Carrying out the 3rd road afterwards cures, stoving temperature is 60～70 ℃ (can select 60 ℃, 62 ℃, 66 ℃, 64 ℃, 70 ℃, 68 ℃), the time of curing is that 5～10min(can select 6 min, 5 min, 7 min, 9 min, 8 min, 10 min), carrying out the 4th road at last cures, 70～80 ℃ of stoving temperatures (can select 72 ℃, 70 ℃, 74 ℃, 76 ℃, 80 ℃, 78 ℃), the time of curing is that 3～6min(can select 3 min, 4 min, 5 min, 6 min); (d) will there be the aromatic polyamide paper of mica paper to carry out roll extrusion through the surface adhesion that the 4th road cures, namely obtain mica tape; The indicated weight of described mica paper is 60～180g/m
2(can select 60 g/m
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(can select 31 g/m
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, being the row's of employing yarn device comes the surface of aromatic polyamide paper and fixing with fibrous paper.The not calendering of the surface of described aromatic polyamide paper.
Described coupling agent is the 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 to be paved spread out, by row's yarn device silvalin be fixed on the fibrous paper then; Described row's yarn device is existing product, is exclusively used in silvalin is fixed on other material surface; Whole aromatic polyamide paper is placed on the conveyer belt to be processed; After coating adhesive mica paper is compounded in the aromatic polyamide paper surface; Be coated with the process of adhesive and cure compound process and all carry out continuously on production line, therefore need to determine in conjunction with the time of curing the speed of production of whole production line, the every performance of product of being produced with assurance meet the requirement of index of correlation.After mica tape is produced, harvest plate-like, check then, packing, warehouse-in; Mica tape can be made different shapes according to different electric equipments, with practical requirement.
Claims (10)
1. mica tape, it is characterized in that, described mica tape adopts following method to make: (a) vertically fix many 160 ~ 250 2 ~ 4 bursts surfaces through the silvalins of coupling agent treatment at the upper surface of aromatic polyamide paper, 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 coat adhesive at the upper surface of the aromatic polyamide paper that silvalin is fixedly arranged; Carry out prebake then, stoving temperature is 50 ± 2 ℃, and the time of curing is 3～5min; (c) mica paper was compound to the upper surface of baking and banking up with earth in advance and the aromatic polyamide paper of silvalin is fixedly arranged, and carried out second road and cure, temperature is 50 ± 2 ℃, and the time of curing is 3～8min; Carry out the 3rd road afterwards and cure, stoving temperature is 60～70 ℃, and the time of curing is 5～10min, carry out the 4th road at last and cure, and 70～80 ℃ of stoving temperatures, the time of curing is 3～6min; (d) will there be the aromatic polyamide paper of mica paper to carry out roll extrusion through the surface adhesion that the 4th road cures, namely obtain mica tape; The indicated weight of described mica paper is 60～180g/m
2, thickness 0.04～0.11mm, described adhesive are high-temperature resistant organic silicon resin, 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 surperficial not aromatic polyamide paper of calendering.
3. mica tape as claimed in claim 1 or 2 is characterized in that, during described surperficial anchoring fiber yarn to aromatic polyamide paper, being the row's of employing yarn device comes the surface of aromatic polyamide paper and fixing with glass fiber yarn.
4. mica tape as claimed in claim 1 or 2 is characterized in that, described coupling agent is the KH560 coupling agent.
5. mica tape as claimed in claim 3 is characterized in that, described coupling agent is the KH560 coupling agent.
6. mica tape as claimed in claim 1 or 2 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 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 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 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 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 true CN103236292A (en) | 2013-08-07 |
| CN103236292B CN103236292B (en) | 2015-06-10 |
Family
ID=48884326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310139940.4A Active CN103236292B (en) | 2013-04-22 | 2013-04-22 | Mica tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103236292B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015192641A1 (en) * | 2014-06-18 | 2015-12-23 | 深圳昊天龙邦复合材料有限公司 | Highly heat conductive boron nitride insulation material and preparation method therefor |
| CN106671513A (en) * | 2015-11-10 | 2017-05-17 | 株洲时代新材料科技股份有限公司 | Mica tape and method for manufacturing 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 (4)
| 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 |
| WO2012062363A1 (en) * | 2010-11-10 | 2012-05-18 | Cogebi S.A. | Mica-based strip |
| 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 |
-
2013
- 2013-04-22 CN CN201310139940.4A patent/CN103236292B/en active Active
Patent Citations (4)
| 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 |
| WO2012062363A1 (en) * | 2010-11-10 | 2012-05-18 | Cogebi S.A. | Mica-based strip |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015192641A1 (en) * | 2014-06-18 | 2015-12-23 | 深圳昊天龙邦复合材料有限公司 | Highly heat conductive boron nitride insulation material and preparation method therefor |
| CN106671513A (en) * | 2015-11-10 | 2017-05-17 | 株洲时代新材料科技股份有限公司 | Mica tape and method for manufacturing mica tape |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103236292B (en) | 2015-06-10 |
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