Film sticker(Backlit film buttons)
Film sticker(Backlit film buttons)
Film sticker (panel)
Product related words: film panel, touch panel, self-adhesive sticker, machine surface sticker, button panel, instrument label, equipment control mask, PET/PC nameplate, self-adhesive label, film label, film label
The panel layer is generally made of exquisite patterns and text printed on colorless transparent sheet materials such as PET, PC, etc. less than 0.25MM. Because the main function of the panel layer is to play the role of identification and keys, the selected material must have high transparency , High ink adhesion, high elasticity, high toughness and other characteristics.
Surface adhesive layer
The main function of the surface glue is to closely connect the panel layer and the circuit layer to achieve the effect of sealing and connection. The thickness of this layer is generally required to be between 0.05 and 0.15 mm, with high viscosity and anti-aging properties; in production In general, special membrane switch double-sided adhesive is used, and some membrane switches require waterproof and high temperature resistance. Therefore, the surface adhesive must also use materials of different properties according to needs.
Related Parameters
| Membrane switch parametersameters | ||
| Electronic properties | Working voltage:≤50V（DC） | Working current:≤100mA |
| Contact resistance:0.5~10Ω | Insulation resistance:≥100MΩ（100V/DC） | |
| Substrate pressure resistance:2kV（DC） | Rebound time:≤6ms | |
| Loop resistance: 50 Ω, 150 Ω, 350 Ω, or determined according to the user's needs. | Insulation ink withstand voltage:100V/DC | |
| mechanical propertiesti | Reliability service life:>One million times | Closure displacement: 0.1 ~ 0.4mm (tactile type) 0.4 ~ 1.0mm (tactile type) |
| Working force: 15 ~ 750g | Migration of conductive silver paste: at 55 ℃, temperature 90%, after 56 hours, it is 10m Ω / 50VDC between two wires | |
| There is no oxidation and impurity on the silver paste line | The line width of silver paste is greater than or equal to 0.3mm, the minimum interval is 0.3mm, the rough edge of line is less than 1 / 3, and the line gap is less than 1 / 4 | |
| Pin spacing standard 2.54 2.50 1.27 1.25mm | The bending resistance of outgoing line is 80 times with d = 10 mm steel rod. | |
| Environmental parametersme | Operating temperature:－20℃～+70℃ | Storage temperature: - 40 ℃ ~ + 85 ℃, 95% ± 5% |
| Atmospheric pressure:86～106KPa | ||
| Printing index index | The printing size deviation is ± 0.10 mm, the outline side line is not clear, and the weaving error is ± 0.1 mm | The chromatic deviation is ± 0.11mm/100mm, and the silver paste line is completely covered by the insulating ink |
| No ink scattered, no incomplete handwriting | The color difference is not more than two levels | |
| There shall be no crease or paint peeling | The transparent window shall be transparent and clean, with uniform color, without scratches, pinholes and impurities. | |
Surface adhesive layer
The main function of the surface glue is to closely connect the panel layer and the circuit layer to achieve the effect of sealing and connection. The thickness of this layer is generally required to be between 0.05 and 0.15 mm, with high viscosity and anti-aging properties; in production In general, special membrane switch double-sided adhesive is used, and some membrane switches require waterproof and high temperature resistance. Therefore, the surface adhesive must also use materials of different properties according to needs.
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