6640 Polyester Film/Polyaramid Fibre
Paper Flexible Laminate(NMN)
Standard No.: JB/T 4061.1-1995
 |
6640 Polyester film/polyaramid fibre paper flexible laminate(NMN) is a three-layer flexible laminate in which polyaramid fibre paper(N) is bonded to the two sides of polyester film(M).
1 Technical requirements
1.1 Type, specification and composing of material are as shown in Form 1
Form 1
|
Type |
Specification |
µm Nominal thickness µm |
|
|
M one layer |
N two-layer(thickness of one layer) |
||
|
6640 |
0.15 |
50 |
50 |
|
0.18 |
75 |
50 |
|
|
0.20 |
100 |
50 |
|
|
0.23 |
125 |
50 |
|
|
0.25 |
150 |
50 |
|
|
0.30 |
190 |
50 |
|
|
0.35 |
190 |
80 |
|
1.2 General requirements
As per chapter 2 in GB 5591.1
1.3 Dimension
Width: No less than 400mm Nominal weight: 20kg～60kg
The splices should be no more than 4 in one roll.
1.4 Properties reqiurements
Properties are as shown in Form 2
Form 2
|
No. |
Properties |
Units |
Values |
||||||||
|
1 |
Nominal thickness |
mm |
0.15 |
0.18 |
0.2 |
0.23 |
0.25 |
0.3 |
0.35 |
||
|
2 |
Thickness tolerance |
mm |
±0.02 |
±0.03 |
±0.04 |
||||||
|
3 |
Grammage |
g/m2 |
180±25 |
210±30 |
240±30 |
260±35 |
300±40 |
350±50 |
430±50 |
||
|
4 |
Tensile strength |
MD |
No bending |
N/50mm |
≥150 |
≥160 |
≥180 |
≥200 |
≥220 |
≥270 |
≥320 |
|
After bending |
≥80 |
≥110 |
≥130 |
≥150 |
≥180 |
≥200 |
≥250 |
||||
|
TD |
No bending |
≥90 |
≥110 |
≥130 |
≥150 |
≥180 |
≥200 |
≥250 |
|||
|
After bending |
≥70 |
≥90 |
≥110 |
≥130 |
≥150 |
≥170 |
≥200 |
||||
|
5 |
Elongation |
MD |
% |
≥10 |
≥12 |
||||||
|
TD |
≥15 |
≥18 |
|||||||||
|
6 |
Breakdown voltage |
No bending |
kV |
≥7 |
≥10 |
≥11 |
≥12 |
≥13 |
≥15 |
≥20 |
|
|
After bending |
≥6 |
≥8 |
≥9 |
≥10 |
≥12 |
≥13 |
≥16 |
||||
|
7 |
Bonding property at room temp. |
No delamination |
|||||||||
|
8 |
Bonding property at 180℃±2℃ 10min |
No delamination, no bubble, no adhesive flow |
|||||||||
|
9 |
Temperature index of heat-resistance in a long term (TI) |
— |
≥155 |
||||||||
2 Testing methods
As per GB 5591.2-1985, Temperature index is as per JB 3730.
3 Inspection, marks, package, transportation and storage
3.1 Inspection items are as per Clause 1.2, 1.3 and Item 2,4,6,7 of Form 2 in Clause 1.4.
3.2 The other items are as per GB 5591.1-1985.
4 Remarks
6640 has excellent heat-resistance, dielectric properties and mechanical strength. It is suitable for slot insulation, interphase insulation and liner insulation in Class F electric motor and electrical apparatus, and it is specially used in special Class F electric motor.