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TorTai prides itself in having the experience and capability to meet the customer's requirements for a complete integrated solution ¨C incorporating the membrane switch, rubber keypad, FPC and PCB.
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Etched |
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printing |
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(Backlight design) | |
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Special Applications about TorTai:
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| Undercut Requested By Rubber Keypad |
| When the undercut around keypad is requested in order to fit the plastic or aluminum housing, Tortai can make it with good tactile snap feeling but no printing and rocking problems. |
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We are offering you the option to order your silicone rubber keypad with a printed circuit board, metal domes, polyester domes or membrane circuit ,thus reducing your time on managing the various sub-assemblies . | |
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| Rubber Emboss For Highlight LED |
| When you need use our products in the darkness,we can just insert the LEDs at bottom of the keypad.However, other places non-translucent. |
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| Rubber + Plastic Assembly |
| Some customers like to have more soft touch feeling and excellent click or good resistance against chemicaIs, he needs to mold the rubber to plastic and has good bonding adhesion between rubber and plastic. |
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| Rubber + Metal Or Brass Inserts |
| When you need insert the metal or brass parts into rubber to match your special requests, Tortai can offer the design & products with good bonding without problems. |
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Keypad Design Guide:
Mechanical & Electric Properties Of Silicone Rubber Keypad |
| Specific Gravity (at 25¢XC) |
1.1 - 1.4 |
| Linear Shrinkage (%) |
2.8 - 4.3 |
| Hardness |
30 - 80 |
| Tensile Strength (kg/cm) |
55 - 75 |
| Elongation(%) |
110 - 530 |
| Tear Strength (kg/cm) |
8 - 12 |
| Compression Set(%) |
11 - 22 |
| Dielectric Strength (kv/mm) |
20 - 25 |
| Actuation Force (grams) |
20 - 500 |
| Contact Resistance (ohm) |
<= 200 |
Cycle Life (10 ) |
0.5 - 20 |
| Operating Temperature Range (¢XC) |
-20 - +180 |
| Storage Temperature Range (¢XC) |
-30 - +250 |
| Contact Rating (at 12v DC for 0.5 sec & 50*10cycles) |
5 mA |
| Contact Bounce |
<= 12 msec | | |
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| Abrasion Testing Method And Criterion |
| All graphics must pass below minimum life on RCA Abrader, 2018664 per IU4001 PORA 5.3.1e. |
| 1. PU coating : 500 cycles |
| 2. PC coating : 1,000 cycles |
| 3. Epoxy coating : 2,000 cycles |
| 4. Plastic keytop bonded : Permanent |
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