Home > Products > Silicone Rubber Membrane Keypad > 20 button function rubber silicone keypad with carbon pill
20 button function rubber silicone keypad with carbon pill
- 500000 Piece / Pieces per Month
- Shanghai 20 button function rubber silicone keypad with carbon pill
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Product Details
Place of Origin: | Jiangsu, China | Brand Name: | FLEXKYS | Model Number: | Custom |
Application: | Telecommunication Equipment | Keypad Button Material: | Rubber |
Product Description
20 button function rubber silicone keypad with carbon pill
How do Silicone or Rubber Keypads Work?
A rubber keypad membrane switch uses compression-molded silicone rubber with conductive carbon pills or with non-conductive rubber actuators. The compression molding process creates an angled web around a keypad center. When a keypad is pressed, the webbing collapses or deforms to produce a tactile response. When the pressure on the keypad is released, the webbing returns the keypad to its original position with positive feedback. The closure of the switch circuit occurs when the conductive pill or printed conductive ink makes contact to a PCB when the web has been deformed.
What are the Benefits of Using Silicone or Rubber Keypads?
•Cost-effective: Rubber keypads are relatively inexpensive on a per piece basis, but require fairly expensive tooling, usually making them a design choice for higher volume projects.
• Outdoor Weatherability: Rubber keypads have exceptional resistance to extreme temperatures and aging and to chemicals and moisture.
• Design Flexibility: Rubber keypads offer a multitude of cosmetic and aesthetic options as well as tactile feedback customization.
• Superior tactile feedback: the geometry of the keypad webbing can create a 3-dimensional keypad with a firm tactile response and longer switch travel. Actuation forces and switch travel can be customized to your requirements.
• Can utilize carbon pills, non-conductive rubber actuators, or stainless steel tactile domes.
• Unusual keypad shapes and sizes can be used, as well as different rubber durometers (hardness).
• Multiple colors can be achieved by flow molding the color into the compression molding process.
• Rubber keypad graphics can be further customized by screen printing the keypad
•Rubber keypad switches can be spray coated with polyurethane for enhanced durability.
• Rubber keypads can be impervious to liquids, dust and gases by utilizing creative designs such as a wrap-around design.
• Back Lighting Flexibility: Rubber keypads can be backlit using LED’s, fiber optic lamps, and EL lighting. Laser-etching the rubber keypad can enhance the effects of back lighting. The use of light pipes in the individual keypads is also a way to customize back lighting and preventing light scatter.
What are Some Design Considerations for Silicone or Rubber Keypads?
• Tactile Response: Varying the tactile response is accomplished by a number of factors such as changing the web geometry and the durometer of the silicone rubber. Durometer can range from 30 – 90 shore A. Many key shape sizes can be designed, and the keypad travel can be as much as 3mm. Actuation force can be as high as 500 grams with certain keypad shapes and sizes.
• Snap Ratio: Altering the snap ratio of the keypad will also affect the tactile feedback of your rubber keypad. Snap ratios of 40% – 60% are recommended for the optimum combination of feel and maximizing the keypad life. Once the snap ratio goes below 40%, the keypad snap-action feel is diminished, although the life of the switch is enhanced.
• Flow Molding: A process by which custom colors are introduced into the compression process so that the colors are molded into the actual silicone rubber. Further customization can be achieved by screen printing custom graphics onto the top surface of the keypads.
• Laser Etching: The process of removing the top coat layer of a painted keypad (usually black in color) to reveal lighter colored layer below (usually white). This way the back lighting only shines through the areas that have been etched away. By combining laser etching with fiber optic, LED, or EL back lighting, there is no limit to the range of creative back lighting effects you can achieve.
Contact us now to speak with a Flexkys Imaging engineer about rubber keypad switch assemblies.
Why Consider Flexkys for Your Silicone or Rubber Keypad Assembly?
A rubber keypad by itself is just that it cannot work without a number of other critical components. Flexkys specializes in the integration of all the necessary components into one complex, feature-rich rubber keypad switch assembly. Our silicone rubber keypad assemblies could include any or all of the following components:
•Silicone rubber keypad
• Printed circuit board
• Bezel with our without additional graphics
• Backlighting components such as fiber optic lamp or LEDs
• Touch screen or LCD display
• Rigid support back panels (aluminum, stainless steel, acrylic, FR4, etc.) with PEM mounting hardware
• Enclosure or molded housing/case
How Do You Design a Silicone or Rubber Keypad?
Silicone rubber keypads are the most widely used form of switching technology today. They offer reliability, long life and design flexibility. There are some simple rules and basic design elements to consider when designing a silicone rubber keypad.
Key design will vary with the functional and aesthetic requirements of the application. It is possible to mold a key in almost any shape and to fit almost any configuration. It is important to remember that the key shape will affect the feel of the key. While a circular shaped standard key will have a consistent feel across the entire surface a half moon shaped key will respond different depending upon where the key is pressed.
Once you have decided upon a key shape and layout; the next item to consider is the method for marking the rubber and creating legends. There are three common methods for marking keypads; printing, laser etching, and plastic key caps.
Printing
Printing is the most common method of marking rubber. The rubber is fixtured to flatten the key top then screen printed. There is no limit to the number of colors available. The arc of the key top determines how far printing must be set back from the edge of the key.
There are currently several options available for improving legend life with printed rubber.
Plastic Key Caps - custom molded clear plastic is adhered over the legend or molded into the rubber
Oil or Epoxy Coating - coating is deposited on the top surface of the key over printing, available in matte, semi-gloss, or gloss finish
Drip Coating - drip coating can be hard or flexible. It adds a glossy layer over the key top. It can not be used on some keys with sharp angles. Hard coatings are subject to cracking if the key has large surface areas.
Parylene Coating - offers the highest level of protection for a non-plastic coating. Parylene bonds to the rubber at the molecular level.
Laser Etching
Laser etching is especially well suited for applications where the keypad is backlit. Etching typically involves three production steps.
1) Translucent rubber (any color) is sprayed with a translucent base coat ink which will be the legend color that is visible to the user.
2) Rubber is sprayed with an opaque top coat ink which will be the overall color of the keypad.
3) The top coat of ink is laser etched away using high speed etchers to reveal the base coat.
Alternatively, you can decide to use a single translucent or opaque rubber ink and laser etch the legends revealing the color of the rubber that is used.
Plastic Key Caps
The longest lasting legend type is custom molded plastic. Plastic legends will not wear out. Many cell phone keypads are designed with plastic keys over rubber.
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Quality Control Standard
Overlay Printing | Spelling mistake | Not allowed |
Incorrect Font | Not allowed | |
Dimension error | >0.2mm is Not allowed | |
Color | Less than 2 levels with the specified Pantone color | |
Dot impurities | Diameter less than 0.2mm Distance between two impurities is more than 50mm The number of impurities is less than 2 within 100cm² | |
Linear impurities | Width is less than 0.2mm,length is less 0.4mm in panel surface.Distance between two impurities is more than 50mm | |
Window impurities | Diameter is less than 0.2mm in the center of the window | |
Circuit layer Printing | Routing error | Not allowed |
Circuit Line width | >0.2mm is not allowed | |
Position offset | >0.2mm is not allowed | |
The key size deviation | >0.2mm is not allowed | |
Dot impurities | Diameter less than 0.4mm 20mmThe number of impurities is less than 3 within 100cm² | |
Linear impurities | Width is less than 0.3mm, length is less than 1mm Distance between two impurities is more than 50mm. Impurities can not across two lines. The number of impurities is less than 3 within 100cm² | |
Loose | Not Allowed | |
Askew | Obvious, Not Allowed | |
Appearance | Product layered, the edge cracking | Not allowed |
Stains | Not allowed | |
Damage | Not allowed | |
Performance | Life of single button | With usual operation method,more than 500K times |
Service life of the switch | In the standard environment and operation method, it is more than 1 year. |
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Packaging&Shipping
First put into a polybag per 50 pcs usually, seperated by cardboard, then paked into a 5-layer carton. According to clients' special requirements.
Delivery Detail:
10-15 days after getting payment.
Shipping: by air, by sea & expressage
Applications&Partners
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Welcome to Nanjing Momao(Flexkys) Electronic Technology Co., Ltd
Nanjing Momao (Flexkys)Electronic TechnologyCo., Ltd is a customer focused contract manufacturer with10years of experience in manufacturing qualified membrane switch products, including PCB Membrane Switch, Copper Flex Membrane Switch,Tactile and Non-tactile Membrane Switch, LED Integrated Membrane Switch , Capacitive Touch Switch,Metal Dome Membrane Swwitch, Poly Dome Membrane Switch,FPC Membrane Switch, Graphic Overlays &Panels&Labels, Silicone keypads&Keyboards and Rubber Keyboards&Keypads, Printed Circuits,etc.
With Nanjing Momao (Flexkys)Electronic Technology Co., Ltd as your collaborating partner we can offer development of prototypes customized production flow and volume production. The size of the contributes the benefits of a smaller companies flexibility, combined with the professionalism and competence of a bigger organization.
To a large extent we can offer customized solutions to our customers both concerning products and logistics.
Our most significant clients are represented within the following branches: electronic scales, safety equipment, household appliance, medical,automotive, and industrial control.
Certifications br
ane switch membr
Exhibition
Welcome to our Global Sources Electronic Components Show 2016
Name: Global Sources Electronic Components Show
Date: 11th-14th, April 2016
Place : Asia World-Expo, Hong Kong
Booth No.: 9G07
We will wait for you!
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1. How to make an order?
Please tell us your material,artwork design,logic circuit principle chart,size,surface,usage etc. And better send us the design drawing or samples together with other detailed datas, then we’ll customize the membrane switch upon your requests.
2. Sample available?
Yes, but based on freight collect. Most of the items are customized for clients, so molding charge is needed.
3. How to guarantee the after sales service?
We will track the production situation of the goods during the whole process,we promise the goods will be shipped to you smoothly. If any problem happened, we will provide the best solution for you.
4. Shipping ways & Delivery Time?
Shipping by: UPS/ Fedex /DHL /TNT or other ways specified.
Delivery time: 10~15 days after payment received.
5. Payment terms:100% T/T in advance.
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Our Service &Advantage
ISO9001:2008 Quality Assurance System
Over 10 years customized manufacturing experience.
Sample is free, you just need to bear the shipping cost.
Customized sourcing , purchasing &manufacturing service.
Help clients to upgrade their design &improve the quality of products.
Original Equipment Manufacturing (OEM)&Original Design Manufacturing (ODM) are welcome.
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Contact Us
- Nanjing Momao Electronic Technology Co., Ltd.
- Contact nameMarilyn Her
- Phone86-25-52104047-806
- Address P338 U Park No.12 Mozhou East Road,Jiangning District Nanjing,Jiangsu
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