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Ⅳ. Teflon film
Teflon film is a kind of nondirective film made of polyflon by die pressing and sinter roasting roughcast and lathe turning. The nondirective film makes directional film and half directional film by means of rolling.
1.Service application:
Shop sign |
Name of production |
Classification |
Service |
9201-1 |
Capacitor film |
Orientation |
Serve for capacitor medium and so on. |
9201-2 |
Conducting wire film |
Orientation
Half orientation
Nondirective |
Serve for the insulation of electric instrument and so on. |
9201-3 |
Film of bearing strip |
Nondirective |
Serve for insulation and sealing and bearing strip |
2. Appearance:
Teflon film doesn’t permit pore space, dirt, mechanism, damage, buckling, and conduction impurity. The end face of the film should be skinpassing and the edge shouldn’t permit chasm and cockle.
3.physical mechanical properties: 
Experimental project |
Unit |
Index value |
|
|
Directional film |
Nondirective film |
Tensile strength |
MPa |
≥30.0 |
≥10.0 |
Breaking elongation |
% |
≥30 |
≥100 |
1MH2 medium wastage angular cut value
≤0.01mm >0.01mm |
—— |
3.0×104
2.5×104 |
—— |
1MH2 dielectric quotiety |
—— |
Mean value
1.8-2.2 |
—— |
Direct current breakdown voltage (normal temperature) |
KV/mm |
Mean value 200 Minimum 40 |
Mean value 40 Minimum 4 |
The standard is accordant with the professional standard of the People’s Republic of China QB/T 3627 1999.
4.Specifications and allowable error:
Designation |
Classification |
Thickness
（mm） |
Margin tolerance of thickness
（毫米） |
Width
（mm） |
Margin tolerance of width
（mm） |
Length（m） |
9201-1 |
Directional |
0.03,0.035 |
±0.002 |
60,90,120 |
±0.3 |
≥50 |
0.04,0.045 |
±0.003 |
60,90,120 |
0.05,0.06 |
±0.004 |
60,90,120 |
9201-2 |
Directional |
0.03,0.04 |
±0.003 |
60,90,120 |
±0.3 |
≥50 |
0.05,0.06 |
±0.004 |
60,90,120 |
0.07,0.08 |
±0.005 |
60,90,120 |
Semi-directional |
0.03,0.04 |
±0.003 |
60,90,120 |
0.05,0.06,0.07 |
±0.005 |
60,90,120 |
0.08,0.09,0.10 |
±0.005 |
60,90,120 |
9201-3
9201-4 |
Non-directional |
0.05,0.06,0.07 |
±0.010 |
90,120,150 |
±2.0 |
≥50 |
0.08,0.10,0.15 |
±0.02 |
90,120,150 |
≥20 |
0.20,0.25,0.30 |
±0.03 |
120,200,250,300 |
±3.0 |
|
Turning board |
0.5,1.0,1.5 |
±0.05 |
120,200,250,300 |
±3.0 |
≥15 |
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