| Being the raw materials of the woven-glass PTFE copper-clad subsrtate,the woven-glass PTFE is made up of non-alkali;woven-glass varnished with the dispersed PTFE emulsion by way of diying,baking and sintering processes.It is a kind of heat resisting,insulation,and low loss microwave material with good electrical performances,non-adhesive and high-temperature abilities.It is suitable to electronic,electrical machinery,aviation,textile,chemical and food industries.It can be also used in microwave circuit devices as the separating layer for multi-layer printed-circuit boards. |
|
1.Types: |
| a.F4B-N Ant adhesive Woven-glass PTFE |
| b.F4B-J Insulation Woven-glass PTFE |
| c.F4B-T Air Permeable Woven-glass PTFE |
| 2.Technical Specifications: |
| a.Exterior Looks:Surface with well paleness and emulsion dispersed homogeneously without cracks and mechanical scars. |
| b.Dimensions:A(length)=1～50m B(width)=900mm～1000mm |
| c.Thickness and Tolerance: |
|
Type |
Guards against sticks uses F4B-N |
Insulation F4B-J |
The ventilation guards against
sticks the varnished cloth F4B-T |
|
Thicknessδ(mm) |
0.08 |
0.10 |
0.15 |
0.40 |
0.1 |
0.15 |
0.24 |
0.04 |
0.07 |
|
Tolerance(mm) |
±0.01 |
±0.02 |
±0.03 |
±0.04 |
±0.05 |
±0.01 |
±0.02 |
±0.004 |
±0.005 |
|
| Mechanical,Physical,Chemical and
Electrical Properties: |
|
No. |
Item |
Test Conditions |
Unit |
Technical Specifications |
|
1 |
Tonsil Strength |
Pulling Force Machin |
Kg/cm² |
1000 |
|
2 |
Donating Temperature |
In Back Oven |
℃ |
250℃ long-term operation 300℃
operation with interruption |
|
3 |
Chemical Temperature |
Immersed in Acid Sal Alkali Liquid |
|
All being inertial |
|
4 |
Surface Resisant Coefficient |
Under Atmospheric Temperature |
Ω |
≥10¹² |
|
5 |
Bullk Resistant Coefficient |
Under Atmospheric Temperature |
Ω.cm |
≥10¹³Ωcm |
|
6 |
Break down Voltage |
δ=0.8 |
KV |
≥0.6 |
| |
|
δ=0.1 |
KV |
≥0.8 |
| |
|
δ=0.15 |
KV |
≥1.1 |
| |
|
δ=0.20 |
KV |
≥1.3 |
| |
|
δ=0.40 |
KV |
≥1.5 |
|
7 |
Dialectical Constant |
1GHz |
εr |
2.7±0.1 |
|
8 |
Dialectical Loss Tangent |
1GHz |
tgδ |
≤2～5×10-4 |
|
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