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Polyester Film for Flexible Circuits and Membrane Switch
 1. COMPOSITION AND PRESENTATION FW- DK10&DK11 are biaxial oriented polyester film for flexible circuits and membrane switch. It has low thickness tolerance, low shrinkage, good planeness and good adhesiveness to ink and silver slurry etc.
2. PROPERTIES AND APPLICATIONS
Properties: the film exhibits excellent electric insulation properties, excellent mechanical strength and upper rebound elasticity, so it can meet the requirements of circuit layers o all flexible membrane switches, low shrinkage and good planeness, so it can meet the precision requirements of precise printing circuit.
Applications: This film is used applicable widely for membrane switch and flexible printing circuit ect.
3. MAIN TECHNICAL CHARACTERISTICS
Table 1
|
Properties |
Unit |
Values |
|
Tensile strength |
75¦Ìm ~100¦Ìm |
MPa |
¡Ý150 |
|
>100¦Ìm ~175¦Ìm |
¡Ý140 |
|
Elongation at break |
¡Ý75¦Ìm |
% |
¡Ý80 |
|
<75¦Ìm |
¡Ý60 |
|
Shrinkage |
MD |
% |
¡Ü0..8 |
|
TM |
¡Ü0..3 |
|
Power frequency dielectric strength
(50)Hz |
75¦Ìm |
V/¦Ìm |
¡Ý105 |
|
100¦Ìm |
¡Ý90 |
|
125¦Ìm |
¡Ý75 |
|
150¦Ìm |
¡Ý70 |
|
75¦Ìm ~100¦Ìm |
¡Ý65 |
Table 2 The allowed deviation of diameter and width of roll (mm)
|
Width |
Diameter |
Allowed deviation |
|
Width |
Extend from reel edge |
|
8¡«150 |
180¡«250 |
¡À0.5 |
£¼0.5 |
|
>150 |
>250 |
¡À1.0 |
£¼1.0 |
Other non-nominal thickness product can be supplied according to the requirement from the clients.
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