The lower adhesive type (PCB adhesive board) POLYDOME, SPACER is double-sided adhesive tape, and POLYDOME is firmly attached to the PCB board.
1. The DOME (PET)
2. Spacer
3. Conductive point (silver paste, carbon paste)
Product parameters:
1. Adhesive:
(mm) thichness | initial force | retentivity(hr/kg*inch) | adhesive force(kgf/inch) | |
Rubber material/project | ||||
Transparent/white one side glue ·
| thickness of adhesive：0.035~0.05 | The adhesive rolling distance of corresponding steel balls is less than 10cm ·
| 8↑ | 0.6↑ |
2.Conductive point: silver-carbon mixture, printing thickness:0.006~0.008
silver-carbon mixture | resistance |
<30Ω |
3.Product parameters
KEY point diameter(mm) | FORCE(g) | CLICK(%) | springbackFR(g) | STROKE(mm) | LIFE | Environmental testing conditions | |
DOME | |||||||
0.1PET | Φ4.5~5.0 | 100~180 | 45~75 | >25 | 0.3~0.45 | 30 | 70℃85%RH48hrs |
0.125PET | Φ5.5~6.0 | 160~260 | 45~75 | >30 | 0.4~0.55 | 50 | 70℃85%RH48hrs |
4. Tolerance requirements:
project | positioning hole to positioning hole(mm) | Positioning hole to shape(mm) | Shape to shape(mm) | Hole diameter(mm) | Positioning hole to key(mm) |
/sample | |||||
Manual sample | ±0.15 | ±0.15 | ±0.15 | ±0.1 | ±0.15 |
Mould sample | ±0.1 | ±0.1 | ±0.1 | +0.08/-0 | ±0.1 |
Note: (1) the positioning hole are minimum aperture Φ 1.0 mm;
(2) the distance between the inner side of the two key points shall be greater than 1.0mm;
(3) The hole edge of the mechanism should be greater than 1.0mm from the key point;
(4) The minimum diameter of the hole of the SP piece is greater than 0.4mm than the diameter of the key point.
5. The sample delivery：
The new model(50~100pcs) | The old model(50~100pcs) | |
Manual sample | 3 ~ 4 working days | 2 ~ 3 working days |
Mould sample | 1 working day after the mold returns | 2 ~ 3 working days |
Mold delivery time: a. forming mold 3-4 working days
B. 6-7 working days for steel mold
Note: 1. The conditions for the life test are as follows: the silicone flat head of the hitting head;Diameter: Φ 1.5;Speed: 2~3 times/second;Strike power: 400-500g.
2. Life determination: a. Before and after life hitting, the rate of change of elasticity and feel of DOME is less than 30%;B. No ink shedding, no KEY point cracking.
Application scenario
The lower adhesive type (PCB adhesive board) POLYDOME, SPACER is double-sided adhesive tape, and POLYDOME is firmly attached to the PCB board.
1. The DOME (PET)
2. Spacer
3. Conductive point (silver paste, carbon paste)
Product parameters:
1. Adhesive:
(mm) thichness | initial force | retentivity(hr/kg*inch) | adhesive force(kgf/inch) | |
Rubber material/project | ||||
Transparent/white one side glue ·
| thickness of adhesive：0.035~0.05 | The adhesive rolling distance of corresponding steel balls is less than 10cm ·
| 8↑ | 0.6↑ |
2.Conductive point: silver-carbon mixture, printing thickness:0.006~0.008
silver-carbon mixture | resistance |
<30Ω |
3.Product parameters
KEY point diameter(mm) | FORCE(g) | CLICK(%) | springbackFR(g) | STROKE(mm) | LIFE | Environmental testing conditions | |
DOME | |||||||
0.1PET | Φ4.5~5.0 | 100~180 | 45~75 | >25 | 0.3~0.45 | 30 | 70℃85%RH48hrs |
0.125PET | Φ5.5~6.0 | 160~260 | 45~75 | >30 | 0.4~0.55 | 50 | 70℃85%RH48hrs |
4. Tolerance requirements:
project | positioning hole to positioning hole(mm) | Positioning hole to shape(mm) | Shape to shape(mm) | Hole diameter(mm) | Positioning hole to key(mm) |
/sample | |||||
Manual sample | ±0.15 | ±0.15 | ±0.15 | ±0.1 | ±0.15 |
Mould sample | ±0.1 | ±0.1 | ±0.1 | +0.08/-0 | ±0.1 |
Note: (1) the positioning hole are minimum aperture Φ 1.0 mm;
(2) the distance between the inner side of the two key points shall be greater than 1.0mm;
(3) The hole edge of the mechanism should be greater than 1.0mm from the key point;
(4) The minimum diameter of the hole of the SP piece is greater than 0.4mm than the diameter of the key point.
5. The sample delivery：
The new model(50~100pcs) | The old model(50~100pcs) | |
Manual sample | 3 ~ 4 working days | 2 ~ 3 working days |
Mould sample | 1 working day after the mold returns | 2 ~ 3 working days |
Mold delivery time: a. forming mold 3-4 working days
B. 6-7 working days for steel mold
Note: 1. The conditions for the life test are as follows: the silicone flat head of the hitting head;Diameter: Φ 1.5;Speed: 2~3 times/second;Strike power: 400-500g.
2. Life determination: a. Before and after life hitting, the rate of change of elasticity and feel of DOME is less than 30%;B. No ink shedding, no KEY point cracking.
Application scenario
