Introduction
Silicone Rubber (Q) is widely used in micro-molding applications due to its exceptional temperature resistance, oil resistance, and biocompatibility. Its ability to withstand extreme heat and cold while remaining chemically stable and flexible makes it the preferred material for medical devices, aerospace components, and precision industrial seals.
This article explores the advantages of silicone rubber micro-molding, key design considerations, and its applications in high-precision medical and high-temperature environments.
Why Use Silicone Rubber (Q) for Micro-Molding?
Excellent Heat & Cold Resistance
- Operates from -100°C to 250°C (-148°F to 482°F), outperforming most elastomers.
- Ideal for aerospace, automotive, and industrial seals exposed to extreme temperatures.
Superior Biocompatibility for Medical Devices
- Meets FDA, ISO 10993, and USP Class VI standards for medical use.
- Used in implantable devices, catheters, seals, and surgical components.
Strong Chemical & Oil Resistance
- Resists oils, greases, and many chemicals better than Natural Rubber (NR) or EPDM.
- Suitable for fluid-handling seals, medical-grade tubing, and aerospace gaskets.
High Flexibility & Durability
- Low compression set ensures long-lasting elasticity in micro-seals and gaskets.
- Maintains softness and resilience even after repeated sterilization.
Design Guidelines for Silicone Rubber Micro-Molding
1. Optimize Wall Thickness & Uniformity
- Recommended thickness: 0.2mm – 1.5mm for micro-seals, gaskets, and biomedical components.
- Consistent thickness prevents air bubbles and ensures dimensional accuracy.
2. Maintain Tight Tolerances
- Standard tolerance: ±0.015mm for high-precision silicone parts.
- Account for ~1-3% shrinkage when designing micro-molded silicone components.
3. Surface Finish Considerations
- Ultra-smooth finishes → Ideal for medical implants and fluid-sealing applications.
- Textured surfaces → Improve grip for wearable medical devices and surgical tools.
4. Gate & Flow Optimization
- Liquid Injection Molding (LIM) ensures consistent flow into complex micro-molded parts.
- Venting is crucial to avoid trapped air in high-precision sealing applications.
Applications of Silicone Rubber Micro-Molding
- Medical & Biomedical Devices – Catheters, implantable seals, surgical tools, and drug delivery systems.
- Aerospace & Defense – Extreme-temperature gaskets, vibration isolators, and fuel-resistant seals.
- Industrial & Automotive – High-temperature O-rings, oil-resistant gaskets, and electrical insulation.
- Consumer Electronics & Wearables – Micro-seals, buttons, and protective casings for high-tech devices.
Silicone Rubber (Q) micro-molding is the top choice for high-precision medical devices, aerospace components, and extreme-temperature applications. With exceptional biocompatibility, chemical resistance, and flexibility, silicone is a trusted material in regulated and high-performance industries.
In need of Silicone Rubber micro-molded parts?
For custom silicone micro-molded components, consult rubber processing experts to optimize material selection and mold design for your application.
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