Different medical applications require different material properties. Some products need transparency and impact resistance, while others require high temperature resistance, chemical stability, or low-cost production.

The most commonly used medical plastics include PC (Polycarbonate), PEEK (Polyether Ether Ketone), POM (Polyoxymethylene), and PP (Polypropylene). Understanding their differences helps engineers and purchasing teams select the best material for their projects.

Key Factors When Selecting Medical Injection Molding Materials：Biocompatibility、Sterilization requirements、Mechanical strength、Chemical resistance、Cost、Production volume

一、PC (Polycarbonate): Transparent and Impact-Resistant Material

Advantages of PC

PC is widely used in medical injection molding because of its excellent transparency and impact resistance.

Main benefits:

• High optical clarity
• Strong impact resistance
• Good dimensional stability
• Suitable for visible medical components

Common Applications

PC is commonly used for:

• Medical device housings
• Transparent covers
• Diagnostic equipment components
• Fluid containers

Limitations

PC has lower chemical resistance compared with PEEK and PP, so material compatibility should be checked before use.

二、PEEK: High-Performance Medical Material

Advantages of PEEK

PEEK is one of the highest-performance medical plastics available.

Key features:

• Excellent heat resistance
• Outstanding chemical resistance
• High mechanical strength
• Long-term durability

Common Applications

PEEK is often used in:

• Surgical instruments
• Implant components
• High-performance medical devices

Limitations

The main disadvantage of PEEK is its high material cost and more complex processing requirements.

三、POM: Precision Plastic for Mechanical Components

Advantages of POM

POM is known for excellent precision and low friction.

Benefits include:

• High dimensional accuracy
• Good wear resistance
• Smooth mechanical performance

Common Applications

Used for:

• Medical device gears
• Valves
• Connectors
• Precision components

Limitations

POM is not suitable for extremely high-temperature applications compared with PEEK.

四、PP: Cost-Effective Medical Plastic

Advantages of PP

PP is one of the most popular medical plastics due to its balance of performance and cost.

Benefits:

• Excellent chemical resistance
• Lightweight
• Affordable
• Suitable for disposable products

Common Applications

PP is widely used for:

• Syringes
• Medical containers
• Laboratory consumables
• Disposable medical products

PC vs PEEK vs POM vs PP Comparison

Material	Main Advantage	Typical Applications
PC	Transparency & impact resistance	Medical covers, housings
PEEK	High temperature & durability	Surgical and advanced devices
POM	Precision & low friction	Mechanical components
PP	Low cost & chemical resistance	Disposable medical products

五、How to Choose the Right Medical Injection Molding Material?

1. Consider Product Function

Ask:

• Does the product need transparency?
• Does it require high strength?
• Is it disposable or reusable?

2. Consider Sterilization Method

Different sterilization processes require different materials.

For example:

• High-temperature sterilization -PEEK
• Disposable products - PP
• Transparent devices - PC

3. Consider Manufacturing Capability

Working with experienced medical injection molding companies helps ensure:

• Correct material selection
• Stable injection molding process
• Better product quality
• Compliance with medical standards

Conclusion

Selecting the right medical injection molding materials is essential for producing reliable medical components.

PC, PEEK, POM, and PP each provide unique advantages:

• PC: transparent and impact-resistant
• PEEK: premium performance material
• POM: precision mechanical solution
• PP: economical disposable material

By understanding material properties and application requirements, engineers can choose the best solution for their medical injection molding projects.

Related Reading: ISO 13485 Medical Injection Molding