Questo prodotto è un componente composito ad alte prestazioni realizzato utilizzando LSR (Liquid Silicone Rubber) overmolding on PSU (Polyphenylsulfone / Polysulfone).

It combines the exceptional high-temperature resistance and dimensional stability of PSU with the flexibility, sealing performance, and biocompatibility of medical-grade liquid silicone rubber.

The structure is widely used in medical, laboratory, and high-end fluid control systems where repeated sterilization, chemical resistance, and long-term reliability are required.

Through precision injection overmolding, the LSR layer is permanently bonded to the PSU substrate, forming a stable soft-hard integrated structure that eliminates traditional sealing assemblies.

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Key Advantages of LSR Over PSU

Excellent High Temperature Resistance

PSU is a high-performance thermoplastic engineered for extreme thermal environments.

• Continuous use temperature up to 160°C
• Excellent dimensional stability under heat
• Suitable for repeated sterilization cycles

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Medical Grade Silicone Performance

The LSR overmold provides biocompatible sealing and flexible interface functionality.

• ISO 10993 compliant
• USP Class VI certified material
• Non-toxic, odorless, and chemically stable
• Suitable for direct and indirect medical contact

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Superior Sterilization Resistance

Designed for demanding medical and laboratory environments.

• Resistant to autoclave sterilization (121°C–134°C)
• Compatible with EO and gamma sterilization
• No cracking, deformation, or yellowing

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Excellent Chemical Resistance

PSU combined with LSR provides strong resistance to aggressive media.

• Resistant to disinfectants and cleaning agents
• Stable in acidic and alkaline environments
• Suitable for repeated chemical exposure

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Integrated Sealing and Structural Design

LSR overmolding eliminates traditional assembly components.

• No O-rings or secondary seals required
• Reduced leakage risk
• Improved system reliability and assembly efficiency

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Processo di produzione

Il prodotto è realizzato utilizzando una tecnologia di sovrastampaggio di precisione:

1. PSU Injection Molding
   High-performance polysulfone is molded into the structural base.
2. Preparazione della superficie
   Surface activation improves bonding performance.
3. LSR Overmolding
   Liquid silicone rubber is injected onto PSU substrate.
4. Polimerizzazione termica
   Silicone is cured to form a permanent bonded interface.
5. Controllo qualità
   Sealing performance, adhesion strength, and dimensional accuracy are verified.

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Specifiche tecniche

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Applicazioni

• Medical sterilization equipment components
• Surgical and diagnostic device housings
• Laboratory fluid handling systems
• Pharmaceutical processing equipment
• High-temperature fluid control systems
• Reusable medical device assemblies
• Precision medical connectors and seals

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Aspetti ingegneristici

Bonding Between LSR and PSU

PSU has high chemical stability and low surface energy, requiring:

• Plasma surface treatment
• Specialized medical-grade primer systems
• Controlled molding temperature for adhesion stability

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Thermal Compatibility

Both materials are selected for high-temperature environments:

• PSU provides structural rigidity at elevated temperatures
• LSR maintains elasticity after repeated sterilization cycles

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Sterilization Performance Design

The system is optimized for:

• Repeated autoclave cycles
• Long-term chemical exposure
• Dimensional stability after thermal cycling

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Domande frequenti

Why choose PSU instead of PC or PA?

PSU offers significantly higher heat resistance and better long-term stability under sterilization conditions.

Is LSR suitable for medical applications?

Yes, medical-grade LSR is widely used in ISO 10993 and USP Class VI certified applications.

Can this product withstand repeated sterilization?

Yes, it is designed for repeated autoclave, EO, and gamma sterilization processes.

È possibile personalizzarlo?

Yes, PSU grade, silicone hardness, structure design, and sealing geometry can be customized.