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As a specialized supplier and processor of high-performance engineering plastics, Shanghai Yunshan Plasticizing Co., Ltd. proudly presents our premium-grade POM Asahi Kasei 4520 material. Engineered specifically for the demanding requirements of medical device manufacturing, this copolymer acetal resin is the trusted choice for creating long-life, reliable mechanisms where failure is not an option. Located in Shanghai, we leverage our technical expertise and supply chain efficiency to deliver this critical material directly to manufacturers who prioritize precision, durability, and patient safety in their medical device components.
The core value of POM 4520 lies in its exceptional balance of properties tailored for dynamic medical applications. Unlike standard plastics, it is formulated to withstand the repeated stresses and sterilization cycles inherent in medical environments.
- Unmatched Fatigue Endurance: The 4520 grade exhibits superior resistance to fatigue, making it ideal for components like gears, bearings, levers, and housing latches that undergo millions of cycles over the device's lifespan.
- Inherently Low Friction & Excellent Wear Resistance: Its low coefficient of friction and high abrasion resistance ensure smooth operation of moving parts without the need for additional lubricants, which is crucial for maintaining a clean, contaminant-free mechanism.
- High Rigidity and Dimensional Stability: It maintains precise tolerances across a wide range of temperatures and humidity levels, ensuring consistent performance and fit in assembled devices.
- Resistance to Sterilization Methods: POM 4520 demonstrates good resistance to common chemical sterilants (like glutaraldehyde) and can perform reliably in applications involving repeated exposure, though specific compatibility should be verified for autoclave (steam) sterilization.
- Good Processability: It offers excellent flow characteristics for injection molding, allowing for the production of complex, thin-walled components with high detail and repeatability.
For engineers and procurement specialists, the technical specifications are paramount. Below is a summary of key properties for POM Asahi Kasei 4520:
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Tensile Strength | ISO 527 | 62 | MPa |
| Flexural Modulus | ISO 178 | 2800 | MPa |
| Izod Impact Strength (Notched) | ISO 180 | 7.5 | kJ/m² |
| Melting Point | DSC | ~165 | °C |
| Coefficient of Friction (Dynamic) | -- | 0.15 - 0.35 | -- |
| Water Absorption (24h) | ISO 62 | 0.22 | % |
The advantages of selecting this material translate directly into benefits for your medical device and its end-users:
- Extended Device Service Life: Mechanisms built with POM 4520 last longer, reducing the frequency of maintenance or replacement and enhancing the device's overall value proposition.
- Enhanced Reliability: Consistent mechanical performance minimizes the risk of mechanism failure, which is critical for patient-monitoring equipment, drug delivery systems, and surgical tools.
- Quieter Operation: The material's damping properties contribute to quieter functioning devices, improving the user experience in clinical settings.
- Design Freedom: Its excellent moldability allows for innovative, integrated designs that can consolidate parts, simplify assembly, and reduce total production costs.
Choosing Shanghai Yunshan Plasticizing as your material partner means more than just a transaction. Our team in Shanghai provides dedicated technical support, from material selection and process optimization guidance to ensuring a stable and timely supply of genuine Asahi Kasei 4520 POM. We understand the stringent regulatory landscape of medical device manufacturing and supply materials that help our clients meet their compliance goals. By opting for this proven, high-performance polymer, you are investing in the durability, safety, and market success of your medical device mechanisms. Contact us today to discuss your specific application, request samples for testing, or to place an order.
Frequently Asked Questions (FAQ)
Q1: Is POM Asahi Kasei 4520 suitable for implantable medical devices?
A: POM 4520 is primarily engineered for long-life mechanisms in non-implantable medical devices. For implantable applications, specific, certified medical-grade polymers are required, and this material is not typically indicated for such use. Always verify biocompatibility standards (like ISO 10993) for your specific application.
Q2: How does it compare to other POM grades or acetal homopolymers?
A: The 4520 copolymer grade offers a better balance of thermal stability and chemical resistance compared to many homopolymers, especially in alkaline environments. Its key advantage for medical mechanisms is its superior fatigue life and lower tendency for stress cracking under repeated load.
Q3: Can it withstand gamma radiation or EtO sterilization?
A: POM materials, including the 4520 grade, generally have limited resistance to high-dose gamma radiation, which can lead to embrittlement. It is more compatible with Ethylene Oxide (EtO) sterilization cycles, but the cumulative effects should be evaluated through application-specific testing.
Q4: What are the typical medical device applications for this material?
A: Common applications include: gear systems in adjustable hospital beds or patient lifts, bearing components in infusion pumps, latch mechanisms in diagnostic equipment housings, and moving parts in inhalers or dose counters.
Q5: Are there specific drying or processing instructions for injection molding?
A: Yes, proper drying is crucial. Typically, it should be dried at 80-105°C for 2-4 hours to achieve a moisture content below 0.1%. Recommended melt temperatures range from 190-210°C. Consulting the technical data sheet and optimizing for your specific mold is advised.
Q6: Is it available in colors other than natural/white?
A: While the standard supply is in natural (opaque white), custom colors can be made available upon request using masterbatches that are compatible with medical applications. Lead times and minimum order quantities may apply.
Q7: Does Shanghai Yunshan Plasticizing provide material certifications or test reports?
A: We supply genuine Asahi Kasei material and can provide standard manufacturer certificates of analysis (CoA) with each batch. Additional specific test reports may be available upon request, subject to feasibility.
Q8: What is the lead time and packaging for orders?
A: Standard packaging is 25 kg paper bags. Lead times depend on current stock levels in our Shanghai warehouse, but we generally aim to support just-in-time delivery for our manufacturing clients. Please contact our sales team for precise scheduling.
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