Corona resistance polyimide films ,not only with ordinary polyimide film electrical properties, good heat resistance and resistance chemicals, but also with the super corona resistance and good thermal conductivity performance, mainly apply to sintering electromagnetic winding wire ,traction motor, wind generators, and the special motor turn-to-turn insulation and heat insulation, the heat resistance level is a class C.
The technical requirements:
1. Type
CR type: Corona resistance polyimide film without any coating
FCR type: Corona resistance polyimide film with F46 single side coating
FCRF type: Corona resistance polyimide film with F46 double side coating
2. Appearance
its appearance is golden brown, translucent, the surface is bright and clean, no wrinkles, tear, particles, bubble, pinhole and foreign material defects. Its edge is tidy, and without damage.
3. Thickness and allowable deviation
Model CR type FCR type FCRF type
Thickness(um) 25 38 50
Allowable deviation(um) 2 3 3
Note: coating thickness may be based on customer demand in 5 ~ 12.5 um range regulation.
4. Width and allowable deviation
Width may cut according to the customer request within 600 -1050 mm. Each volume length is for 500-1000 m; Each volume joints for final product are not more than three, the proportion of volumes with joints vs the total volumes number in the one order is not more than 25%,the shortest length is more than 300 m; Single plate or roll products joint numbers are not more than three, the shortest length is more than 300 m.
FCR type and FCRF type using thermal bonding lap.
5. Film marks:
-Every single volume label marked: batch number, specification, net weight;Every single plate or roll labeling: specification.
-Package should have obvious and firm mark;
-The format of the packing cases is confirmed by purchase order related terms.
Serial Number Type CR FCR FCRF
1 Corona resistance life (h)
1 KV voltage, frequency 20 KHz
temperature 90 2
pulse rise time 400 ns
Y80
Y80
Y80
2 Industrial frequency electric intensity (v/um) Y200 Y120 Y100
3 Surface resistivity 1X1014 1X1014 1X1014
4 Volume resistivity 1 1X1010 1X1010 1X1010
5 Relative permittivity (48-62 Hz ac) 3.2 0.4 3.2 0.4 3.2 0.4
6 Dielectric power factor (48-62 Hz ac) 13.5X10-3 13.5X10-3 13.5X10-3
7 Tensile strength (Mpa) : Y135 Y80 Y80
8 Elongation at break (%) Y40 Y40 Y40.
1. Testing method: According to the ICE62068-1-2003/ GB /T13542.6-2006 "electrical insulation, part 6," Polyimide film for electrical insulation regulation experimental method.
2. Film packaging: Film roll with plastic film packaging, outer with shockproof foam cushion packaging, and support in place in the package overhead, make the film in the transportation conditions often get fully protected without damage, each volume end article sticker marking.
3. Dust is strictly prohibited in the packing box internal.
4. Film should be stored in a dry and clean indoor, film roll to be supported in the box, placed suspended and not be erected. It should not be close to the fire, central heating or exposed to direct sunlight.
5. Products should avoid damp and mechanical damage in the storage and transport.
6. Film storage period is for two years after COA issued date. Expired films are still available after again qualified according to the product standards inspection.
Standard number: 2006 GB/T13542.6-2006
Application range: The polyimide film is to be produced by cast method, which has High temperature resistance, resistance to radiation and excellent dielectric properties, applicable to electrical insulating of the class H electric motor and other electrical equipments , and other use electrical insulating materials.
A. Technical requirements
1. Appearance: Film surface is bright and clean, not due, tear, particle, bubbles,
Pinhole and foreign material defects ;Edge is tidy, without damage; Films supply in rolls.
2. Size
2.1. Thickness and allowable deviation:
The standard thickness(um) 12.5 25 40 50 75 100 125 175 200
The allowable deviation(um) +1 +2 +2 +2 +3 +4 +4 +5 +5
-1 -1 -2 -2 -3 -3 -4 -5 -5
Note: Supplying according to customer request with thickness 12.5-22.5 um, allowable deviation can be negotiated by both sides.
2.2. Width: no less than 250 mm, deviation +/-1.6mm. According to the needs of the users, tape can be cut with different specifications.
2.3. Length: Supplying according to the requirement of customer.
2.4. Performance requirements
Serial number Index name Unit Index
25um 40um 50um 75um 100um
1 density Kg/m3 1425 10
2 tensile strength horizontally Mpa Y165
vertically
3 elongations horizontally and vertically % Y40 Y50
4 shrinkage rate horizontally
and vertically 150 400 % 0.35 2.5
5 industrial frequency electric strength
48H2 62H2 v/um Y240 Y200 Y180 Y160
6 surface resistance,200 Y1.0X1014
7 Volume resistance,200 M Y1.0X1010
8 Relative permittivity
48 62Hz - 3.5 0.4
9 dielectric power factor
48 62Hz - 4.0X103
10 long-term heat resistance temperature index - Y180.
1. Film should be wrapped in a tube on core and supply in rolls; Each volume in a plastic bag packing and seal, placing in dry and clean case
2. Each box packaging should specify model or type, product name, specification, batch number, gross weight, net weight, manufacturing date, manufacture ¡¥s name, and product test report. At the same time, marked "Moisture proof" "Prevent Impact" and other words in packing body.
3.Film should be stored in a dry and clean indoor, from the date of original shipment, shelf life for two years, more than storage life according to the standard check again, qualified can still use.
4. In storage and transport process, should avoid damp and mechanical damage.
