Vaso para nebulizador respiratorio médico con sobremoldeado de LSR sobre una carcasa de PC

This product is a medical-grade nebulizer cup designed for respiratory and inhalation therapy equipment. It is manufactured using advanced LSR (Liquid Silicone Rubber) overmolding on PC (Polycarbonate) technology, combining rigid structural performance with flexible sealing functionality in a single integrated component.

The design enables high transparency, excellent sealing performance, and long-term durability under repeated sterilization conditions, making it suitable for critical medical respiratory applications.

Key Advantages of LSR Overmolding Technology

Caucho de silicona líquida (LSR) de grado médico

The overmolded silicone material is specially formulated for medical applications. It offers excellent biocompatibility and is suitable for inhalation-related environments.

• ISO 10993 biocompatibility compliant
• USP Class VI certified material
• Odorless, non-toxic, and stable under long-term use
• Suitable for direct or indirect patient contact

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Superior Sealing Performance

The LSR is permanently bonded to the PC substrate through precision injection molding, forming a seamless sealing interface.

• Eliminates traditional O-rings and manual assembly
• No leakage risk from joint gaps
• Stable sealing under long-term cyclic use

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High Temperature and Sterilization Resistance

Designed for repeated medical sterilization processes.

• Steam sterilization resistance: 121°C to 134°C
• Compatible with EO and gamma sterilization
• No deformation, cracking, or discoloration after repeated cycles

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High Transparency PC Structure

The PC housing provides excellent optical clarity and mechanical strength.

• Clear visibility of liquid level and flow status
• Alta resistencia a los impactos
• Dimensional stability under thermal stress

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Integrated One-Piece Structure

LSR overmolding enables a fully integrated soft-hard design.

• Menos pasos de montaje
• Mayor uniformidad en la producción
• Lower risk of human assembly error
• Enhanced product reliability

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Proceso de fabricación

The product is produced through a precision two-step injection molding process:

1. PC Injection Molding
   Medical-grade polycarbonate is molded into the structural base, forming the rigid housing and internal flow channels.
2. LSR Overmolding
   Liquid silicone rubber is injected onto the PC substrate, forming soft sealing structures and functional interfaces.
3. Permanent Bonding Formation
   Under controlled temperature and pressure, LSR chemically or mechanically bonds with PC, forming a durable integrated structure.

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Especificaciones técnicas

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Aplicaciones

• Medical nebulizer systems
• Respiratory therapy devices
• Inhalation drug delivery equipment
• ICU respiratory support systems
• Home healthcare nebulization devices
• Medical gas and fluid control systems

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Engineering Challenges and Solutions

LSR to PC Bonding Stability

Silicone rubber has natural chemical inertness, making adhesion to PC challenging. This is solved through:

• Self-bonding medical-grade LSR formulations
• Surface activation or primer treatment on PC
• Controlled mold temperature for optimal chemical bonding

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Thermal Processing Balance

PC and LSR have different thermal requirements.

• PC has a limited heat deflection temperature range
• LSR requires high curing temperature for vulcanization
• Requires optimized mold temperature and high-heat PC materials

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Precision Flash Control

Due to the very low viscosity of LSR:

• Mold tolerance must be controlled at micron level
• High-precision tooling is required to prevent flash formation
• Critical for medical-grade surface quality

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Preguntas frecuentes

What is the benefit of LSR overmolding compared to traditional assembly?

LSR overmolding eliminates separate sealing components such as O-rings, reducing leakage risk and improving long-term stability.

Is the product suitable for repeated sterilization?

Yes, it is designed for repeated autoclave sterilization between 121°C and 134°C without performance degradation.

Does the silicone become hard or degrade over time?

Medical-grade LSR maintains elasticity and mechanical stability under long-term use.

¿Se puede personalizar el diseño?

Yes, customization is available for geometry, hardness, color, and sealing structure based on application requirements.