POLYDOME button is a carbon film convex bag button with good compression resistance. It is an appropriate switch button on various remote controls. It uses polyester film hot pressing material, which can replace metal dome ,the operation feels better, there is a noise during operation, it can have a certain waterproof effect, and can effectively prevent dust, moisture, and heat.
Carbon film convex hull button can be up and down bonding assembly, backing and septum are double-sided adhesive, that is, with silicone bonding, and PCB bonding, good stability!
1.RUBBER
2.DOME(PET)
3.(Spacer)
4.Conductive point (carbon silver)
Product parameters:
1. Adhesive:
project/ | thickness(mm) | initial force | retentivity(hr/kg*inch) | adhesive force(kgf/inch) |
Plastic | ||||
Rubber | 0.125 | 10cmThe adhesive rolling distance of corresponding steel balls is less than 10cm
| Silicone and synthetic resin
| 0.8↑Silicone 1.0↑ synthetic resin |
Transparent/white one side glue
| thickness of adhesive：0.035~0.1 | The adhesive rolling distance of corresponding steel balls is less than 10cm
| 8↑ | 0.6↑ |
2.Conductive point: carbon silver, first printed silver paste in the printed carbon paste, thickness: 0.008~0.012.Advantages: strong antioxidant, not easy to scratch.
Carbon silver | resistance |
<10Ω |
3.Product Specification
specification | KEY point diameter(mm) | FORCE (g) | CLICK (%) | springbackFR(g) | STROKE(mm) | LIFE | Environmental testing conditions
|
/DOME material | |||||||
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 requirement：
project /sample | positioning hole to positioning hole(mm) | Positioning hole to shape(mm) | Shape to shape(mm) | Hole diameter(mm) | Positioning hole to key(mm) |
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.
