Overview
Our Conductive Silicone Rubber Keypad Button with PU Coating offers a durable, tactile user interface solution. The silicone provides flexible actuation with embedded conductive elements, while the PU topcoat ensures a smooth, wear-resistant, and easy-to-clean surface. Perfect for consumer electronics, industrial controls, and medical devices, we offer full OEM customization.
Basic Information
| Attribute | Details |
|---|---|
| Material | Food Grade Silicone Rubber (HCR/LSR) |
| Conductive Element | Molded-in Carbon Pill / Conductive Silicone |
| Surface Coating | Polyurethane (PU) Protective Layer |
| Hardness (Shore A) | 40 – 60 (Customizable) |
| Actuation Force | 100 – 350 gf |
| Contact Resistance | < 100 Ω (for carbon pill) |
| Legend Marking | Laser Etching, Under-PU Printing |
| Color | Any Pantone / RAL Color |
| Operating Temperature | -40°C to +200°C |
| Environmental Certifications | RoHS, REACH |
| Safety Certifications | FDA (Food Grade Material), ISO 9001 |
| Brand | OEM / White Label |
| Packaging | ESD Bags, Trays, Custom |
| Origin | Xiamen, China |
| Production Capacity | High-Volume Capable |
Surface Coating Options
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Abrasion-Resistant PU Coating: A polyurethane layer applied over the molded silicone, providing exceptional resistance to wear, scratching, and UV degradation while maintaining a consistent tactile feel.
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Matte or Gloss PU Finish: Available in a low-glare matte texture for a premium feel or a high-gloss finish for aesthetic appeal, both offering the same underlying protective qualities.
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Chemical-Resistant PU Formulation: A specialized PU coating designed to withstand exposure to oils, solvents, and cleaning agents commonly found in industrial or medical environments.
Advantages of Conductive Silicone Buttons with PU Coating
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Reliable Electrical Contact: The integrated conductive carbon pill or silicone provides a stable, low-resistance connection to the PCB, ensuring consistent switch actuation over the product’s lifespan.
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Enhanced Surface Durability & Cleanability: The PU coating creates a sealed, non-porous surface that resists wear from repeated use and can be easily wiped clean, protecting the underlying graphics and material.
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Superior Tactile Response & Comfort: The combination of flexible silicone and a tuned actuation force delivers a precise, satisfying keystroke feel, improving user experience and reducing input errors.
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Design Flexibility & OEM Integration: Fully customizable in shape, size, color, embossing, and graphic legends. Can be designed as individual buttons or full keypad matrices to integrate seamlessly into your product assembly.
Production Process
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Silicone Molding: Conductive carbon pills are precisely placed into a multi-cavity mold, followed by the injection or compression molding of liquid or high-consistency silicone rubber around them to form the button substrate.
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Post-Curing & Deflashing: The molded buttons are post-cured to achieve final material properties and then undergo a deflashing process to remove any excess material (flash) for a clean edge.
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Surface Preparation & Coating: The silicone buttons are cleaned and treated to ensure optimal adhesion for the PU coating, which is then uniformly applied via spraying or dipping.
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PU Coating Curing: The coated buttons are moved to a controlled curing oven where the PU layer is hardened, forming a durable, bonded top coat.
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Legend Application: Graphics, symbols, or letters are applied via precision pad printing onto the cured PU surface or via laser etching, which removes the top coating to reveal a contrasting silicone color beneath.
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Functional & Quality Testing: 100% of buttons undergo visual inspection. A sample batch is tested for actuation force, travel distance, and electrical continuity/resistance to ensure performance specifications are met.
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Packaging: Buttons are packaged in anti-static materials or custom trays designed to prevent damage and facilitate automated assembly by the customer.
Our Factory
Our production integrates cleanroom silicone molding with a dedicated coating facility. We operate LSR injection and compression presses with insert-molding capabilities for carbon pill placement. A separate, climate-controlled area houses our automated PU mixing, dispensing, and curing systems. Quality is rigorously controlled through in-process checks with digital force gauges and resistance meters, and final inspection under high-magnification optics. Our ISO 9001-certified system ensures traceability and consistent quality from raw material to finished, coated conductive button.