Silicone Rubber Keypad Carbon Pill Switch Button

Carbon pill silicone buttons are a type of conductive silicone keypad known for their superior durability compared to conductive ink printing keypads. These buttons are crafted from rubber infused with graphite, enabling efficient electrical conduction when pressed.

Carbon Pills & Graphite Pads are widely employed in silicone rubber keypads due to their cost-effectiveness and low resistance. Conductive carbon pills are created by adding carbon to macromolecule elastomers like silicone, reducing volume resistance. The resistance levels are influenced by carbon particle properties and quantity, with smaller particles resulting in lower resistance.

Manufactured through die-cutting or compression molding, carbon pills come in two variants: textured finish and smooth finish. Silicone rubber keypad manufacturers typically choose among four conduction methods based on resistance requirements and application: conductive ink, carbon pills, metal domes, and golden pills.

Specification of Silicone Rubber Keypad Carbon Pill Switch Button

• Material: Silicone Rubber, Liquid Silicone Rubber
• Color: transparent and other colors
• Size:  According to your drawings
• Hardness: Shore A  30°~80°
• Legends: Screen Printing or Laser Etching & Engraving
• Molded Way: Compression Molding
• Performance: Aging resistance, cold resistance, heat resistance, chemical stability
• Certificate: ISO9001-2015, IATF16949
• OEM/ODM: Available
• Samples: free available samples
• Logo: Customized (Silkscreen logo, embossed or debossed logo)

Carbon Pills Silicone Buttons Manufacturing Process

Unlike conductive ink keypads, where conductive ink is applied post-compression molding, carbon pill silicone keypads incorporate carbon pills during the compression molding process. Carbon pills are strategically positioned within mold cavities using specialized tools before compression molding. This ensures their seamless integration with the silicone during vulcanization. Successful integration hinges on precise vulcanization timing and mold temperature control. Lower temperatures risk dislodging carbon pills, while higher temperatures may cause them to melt into the silicone.

The Advantages of Silicone Rubber Keypad Carbon Pill Switch Button

1. Enhanced Durability: Carbon pill switch buttons surpass conductive ink keypads in longevity. They resist wear over time, maintaining stable resistance. In contrast, conductive ink keypads may see increased electric resistance with extended use.
2. Cost Efficiency: Carbon pills offer a cost-effective solution for silicone rubber keypad manufacturing compared to pricier options like metal dome or golden pill keypads.