Asahi Kasei TENAC™ 5050
A High-Cycle POM Homopolymer for Demanding Engineering Applications
1.0 Executive Summary
1.1 Material Classification
Asahi Kasei TENAC™ 5050 is an unfilled, general-purpose polyacetal (POM) homopolymer. A high-performance, semi-crystalline thermoplastic, it is renowned for its excellent mechanical properties and dimensional stability.
1.2 Portfolio Position
Strategically positioned as a "High-Cycle Grade" with medium viscosity, this material is engineered for enhanced manufacturing efficiency, allowing for faster injection molding cycles ideal for components with thin wall sections.
1.3 Commercial Advantages
TENAC™ 5050 delivers superior mechanical performance with optimized processing. Key features include short cycling time, low warpage, high stiffness, and superior resistance to creep and fatigue, making it a strategic choice for high-volume automotive and electronics applications.
2.0 Comprehensive Material Properties
2.2 Mechanical Properties
| Property | Value | Unit | Standard |
|---|---|---|---|
| Tensile Modulus | 3300 | MPa | ISO 527 |
| Tensile Stress at Yield | 73 | MPa | ISO 527 |
| Flexural Modulus | 3100 | MPa | ISO 178 |
| Flexural Strength | 108 | MPa | ASTM D790 |
| Charpy Notched Impact | 7 | kJ/m² | ISO 179/1eA |
| Rockwell Hardness | R 120 | - | ASTM D785 |
2.1 Physical Properties
| Property | Value | Unit | Standard |
|---|---|---|---|
| Density | 1.42 | g/cm³ | ASTM D792 |
| Melt Mass-Flow Rate (MFI) | 21 | g/10min | ISO 1133 |
| Water Absorption (24 hr) | 0.2 | % | ASTM D570 |
Key Mechanical Properties (MPa)
3.0 Processing & Fabrication
3.1 Recommended Molding Parameters
| Parameter | Recommended Value |
|---|---|
| Pre-drying Temperature | 80 - 90 °C |
| Pre-drying Time | 3 - 4 hours |
| Melt Temperature | 190 - 210 °C |
| Mold Temperature | 60 °C |
3.2 Critical Considerations
POM homopolymers have a narrow processing window. Exceeding recommended temperatures or residence times (max 230°C) can lead to thermal decomposition and release of hazardous formaldehyde gas. Strict process control is essential.