Ultraviolet-Proof Waterproof Membrane Switch Keyboard For Outdoor Controller
let's discuss the key design considerations for an ultraviolet (UV)-proof membrane switch:
Material Selection
- The membrane material must be highly resistant to UV light exposure to prevent degradation over time.
- Polycarbonate, polyester, and silicone-based films are common choices for UV-resistant membranes.
- The conductive inks or metal domes used in the switch must also be UV-stable.
UV Protection
- To protect the internal components, the switch assembly needs to be designed with UV shielding.
- This can involve adding UV-blocking layers or coatings to the membrane and housing.
- The goal is to prevent UV light from penetrating and damaging sensitive elements like the conductive traces and adhesives.
Optical Clarity
- For applications where visual indicators or displays are important, the membrane must maintain optical clarity despite the UV protection measures.
- This may require specialized materials or coatings that block UV while still allowing visible light transmission.
Durability and Reliability
- The UV-resistant membrane and assembly must still meet the required durability and reliability standards for the application.
- Extensive testing is done to validate the switch can withstand long-term UV exposure without degradation of performance.
Environmental Factors
- In addition to UV resistance, the switch must also withstand other environmental stresses like temperature, humidity, chemicals, etc.
- Careful material selection and sealing techniques are required to protect the internal components.
Quality and Documentation
- Manufacturing in a controlled, ISO-compliant environment with robust quality systems is critical.
- Complete documentation is necessary to demonstrate compliance with applicable standards and regulations.
Overall, the key differences from a standard membrane switch are the focus on UV-resistant materials and shielding to protect the internal components and maintain long-term performance
Membrane switch Performance Index
| Environmentl | Operating Temperature | -40°C to +80°C (-40°to 176°F) | | | Storage Temperature | -40°C to +85°C (-40°to 185°F) | | | Humidity | 40°C, 90% to 95% for 240 hours | | | Vibration | 20G's max. | | Mechanical | Actuation Force | Non-tactile 60g to 300g (2oz to 10oz) | | | | Tactile 150g to 400g (6oz to 14oz) | | | Switch Stroke | Non-tactile 0.1 to 0.5mm | | | Life Expectancy | Tactile 0.6 to 1.5mm | | | | Non-tactile >5 million actuations | | | | Tactile >1 million actuations | | Electrical | Operating Voltage | 35 volts maximum | | | Operating Current | 10 micro amps to 100 milliamps, resistive | | | Operating Power | 1 watt maximum | | | Circuit Resistance | 10 ohms to 500 ohms, dependent on size and layout | | | Insulation Resistance | 100M ohms at 100V DC | | | Dielectric Withstand | >250 VRMs (50-60Hz 1 minute) | | | Contact Bounce | ≤ 5 milliseconds | |
Product spec :
| Overlay material ---For front or face overlay |
| Polyester | Polycarbonate |
| 1 Highly versatile for embossing
2 Highly resistant for chemicals
3 Better durability
4 For internal and external use | 1 wide range of the surface finishes and thicknesses
2 More cost-effective
3 For internal and external use
4 many Lexan label choose |
| Embossing --- Graphic overlay or up circuit can be embossed in order to insert metal stainless steel domes for good tactile when press .Leave space for mechanical keys and provide tactile indications |
| Pedestal embossing | Rim embossing | Pillow embossing | Dim embossing |
| Windows or LCD --- For display functions |
| Printed colors windows such like red ,black and so on | Transparent finishes windows |
| Keys |
| Tactile Keys :witch metal domes or Poly domes ,Metal dome with different diameter and pressure kinds | Non-tactile keys: printed silver spot on the circuit |
| LEDs ---Miniature LEDs ,LED colors :white ,Green ,Red ,Blue ,Yellow ,Orange and others |
| EL and Sensors or inductors --- EL can be light any place where where you like ,and sensors can be used as LEDs |
| Cables --- is extension of circuit and communication with your device |
| Screen printing conductive silver cable | Copper plated cable /Polyimide or FPC | PCB cable |
| Types of connector --- 1 Zero insertion force(ZIF) with 0.5MM ,1.0MM,1.25MM pitch ;2 Female connector with 2.54MM pitch; 3 Male connector |
| Shielding --- For protection function |
| Gasket seal/Waterproof :protect the conductors against from the humidity and splashes | EMI/RFI/ESD Shielding: use an Aluminum foil shielding /clear ITO electrical conductive polyester to protect |
| Rear Adhesive --- Mostly use the 3M double-side mounting glue brand of USA. Also accepted others such like Lohmann and others |
| Back plate --- Use in Aluminum ,Polycarbonate ,Acrylic Or PMMA |
| Matching color --- PMS or RAL Is best ,CMYK or RGB also can be ok if you can supply PMS Or RAL |
| Standard Tolerances :+/-0.2MM |
Common membrane keypad structure choose :
Other photo show :
About ShenZhen TaiDa Menbrane switch CO.,LTD
Taida are an OEM professional specializing in designing and manufacturing membrane switch ,graphic overlay and adhesive sticker/labels with with more than 15 years experience in Shenzhen of China which are widely used in industrial,electronics,household appliance,medical equipments.we have more than 500 different customers .and most of our customer come from USA ,EU ,UK ,middle east and other famous country of world wide.Taida can supply different kinds of Membrane switch based on each client's request .
Factory Strength:
Factory Area: Over 2000 Square meters
Employee :＞ 70
R＆D
Continued quality improvement ,professional Tech support and latest design
From our R＆D department for customers’ demand or samples
Manufacturing
Strong productivity and unified producing process to ensure the fastest delivery time.
QC/QA
20% Employee are QC/QA workers ,quality Guaranteed
Dispatch Department
Power dispatch ability to ensure shipping accuracy and speed
Sales ＆ Customers
Overall ,close and long-term service,No matter in saling and after-sales
Many customers show in our company from worldwide
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Ultraviolet Proof Flexibility Membrane Keypad Switch For Outdoor Controller Images
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