Application of liquid silicone overmolding precision injection molding in blood glucose meter sensors

The application of liquid silicone rubber (LSR) overmolding precision injection molding technology in the manufacturing of continuous glucose monitoring (CGM) devices mainly involves sensor encapsulation, waterproof design, and improved wearing comfort. The following are the specific applications and advantages of this technology in CGM devices:

Sensor Liquid Silicone Overmolding - Suzhou Donghao

1. Sensor Encapsulation and Biocompatibility

- Waterproof and Sweatproof: CGM devices require prolonged wear (typically 14 days). The hydrophobicity and elasticity of liquid silicone make it an ideal waterproof material, preventing sweat and moisture from penetrating the sensor and ensuring device stability during showering, exercise, and other scenarios.

- Biocompatibility: Silicone materials are skin-friendly, reducing allergic or irritation reactions, making them suitable for long-term skin contact.

2. Precision Injection Molding Improves Manufacturing Efficiency

- Miniaturization Design: CGM devices are trending towards miniaturization (products weighing only about 2.0 grams). Liquid silicone overmolding technology can precisely mold ultra-thin, complex structures to meet the high-precision sensor encapsulation requirements.

- Liquid silicone can be used in injection molding to produce high-precision, complex-structured encapsulated components, meeting the demands for miniaturization and precision in sensors.

- Automated Production: The CGM production line utilizes automated injection molding, enabling large-scale, high-efficiency production with a high degree of automation and high production efficiency, while ensuring product consistency.

3. Wearing Comfort and Durability

- Soft Fit: The flexibility of silicone allows the probe to conform to the skin, reducing friction and discomfort during movement and improving user compliance.

- Anti-aging and Corrosion Resistance: Silicone is resistant to sweat, ultraviolet radiation, and temperature changes, ensuring stable performance of the device over long-term use.

4. Future Development Trends

- Integrated Design: With the development of closed-loop insulin pump systems, liquid silicone encapsulation technology may be further used to integrate CGM and insulin delivery modules, achieving more compact, integrated medical devices.

- Cost Reduction: By optimizing injection molding processes (such as multi-cavity molds and rapid vulcanization technology), the manufacturing cost of continuous glucose monitoring devices can be reduced, promoting widespread adoption.

The application of liquid silicone coating in CGM blood glucose meter sensors not only improves the performance and reliability of the sensors, but also enhances the wearing comfort and user experience for patients, which is of great significance to promoting the development of CGM technology.