RADEL R5500 vs RADEL R4400

Among PPSU (polysulfone) materials, RADEL R5500 and RADEL R4400 are two common models for purchasers. Both belong to the UL94 V-0 flame retardant grade, but they each have their own advantages in terms of toughness, heat resistance and application positioning. This article will take you through an in-depth comparison to help you make a quick selection.

01 | Performance Comparison

Toughness and impact performance

  ・R5500: The notched impact value of the cantilever beam is approximately 534 J/m, offering stronger impact resistance and making it suitable for extreme environments.

  ・R4400: Approximately 267 J/m, with a relatively low impact strength, making it more suitable for medium-load environments.

Heat resistance performance

  ・R5500: The heat distortion temperature can reach 207℃, making it suitable for frequent high-temperature applications.

  ・R4400: Approximately 190℃, with slightly inferior heat resistance.

Flexibility and ductility

  ・R5500: With an elongation rate as high as 90%, it is suitable for complex forming and parts that require toughness.

  ・R4400: Elongation is approximately 60%, and its molding compatibility is slightly lower.

Mechanical equilibrium

  ・R5500: It combines strength and toughness, and is more inclined towards a "comprehensive type".

  ・R4400: It has slightly higher bending strength and modulus, and has an advantage in scenarios with higher rigidity requirements.

02 | Application Differences

RADEL R5500

  ・Medical devices (repeated high-temperature sterilization, transparent components)
  ・Aerospace (impact-resistant components)
  ・High-end electronic and electrical products (parts with high requirements for flame retardancy and long-term stability)

RADEL R4400

  ・Electrical insulating parts (in scenarios with high rigidity requirements)
  ・General industrial components (Durability requirements in medium-temperature environments)
  ・Cost-sensitive projects (still reliable under limited budgets)

03 | Comparison and Purchasing Recommendations

  ・If you need high-end applications that are shock-resistant, heat-resistant and suitable for repeated sterilization → choose RADEL R5500

  ・If you are more concerned about rigidity, cost and general industrial applications → choose RADEL R4400

In a nutshell:

👉 R5500 = high-end medical & aviation grade PPSU

👉 R4400 = industrial general & cost-performance preferred

04 | Customer Feedback

R5500 user: Medical customers have reported a longer service life and a reduced frequency of parts replacement.

R4400 users: Electronic manufacturers prefer its rigidity and stability, which meet standard testing requirements and have controllable costs.

05 | FAQ

Q1: Can both be used in medical devices?

Sure, but the R5500 is more suitable for repeated sterilization and high-end medical scenarios.

Q2: Which material is more suitable to replace metal parts?

The impact toughness and ductility of A2: R5500 give it an edge when it comes to lightweight alternatives to metals.

Q3: How is the procurement cycle and supply situation?

Juyuan maintains a stable inventory and can provide a continuous supply of R5500 and R4400 according to customer demand.

06 | Reasons to Choose Juyuan

As an international plastic raw material trader with 24 years of experience, Juyuan is committed to providing customers with professional services for PPSU series materials (including RADEL R5500 and R4400) :

  ・Supply chain guarantee: Long-term cooperative channels to ensure stable supply of goods.

  ・Global experience: Exports cover industries such as healthcare, aviation, electrical, and food.

  ・Selection consultation: Assist customers in making a quick decision between R5500 and R4400.

  ・Cost optimization: Provide cost-effective solutions while ensuring performance.

07 | Conclusion

  ・RADEL R5500 - The preferred choice for high-end applications, suitable for extreme environments and high-frequency sterilization.

  ・RADEL R4400 - A reliable choice for industrial grade, with strong rigidity and high cost performance.

At PPSU procurement, Juyuan will provide you with a one-stop solution.

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