Yuntianhua® ST-20 POM
Plastic Granules
Yuntianhua® ST-20 Impact Modified Pellets Acetal Copolymer
Yuntianhua® ST-20 is an impact-modified POM copolymer. It offers higher toughness than standard M90. It keeps POM wear, fatigue, and chemical resistance. With 20 kJ/m² notched impact strength and 140% break strain, it fits clips, gears, sleeves, and gaskets.
Associated Documents
TDS - Data Sheet
Typical property data
Physical Properties
- Density: 1.3 g/cm³ (ISO 1183)
- Melt Mass-Flow Rate, MFR: 7 g/10 min at 190°C/2.16 kg (ISO 1133)
- Water Absorption: 0.6% after 24 hr at 23°C (ISO 62)
Mechanical Properties
- Tensile Stress at Yield: 33 MPa (ISO 527-2)
- Tensile Modulus: 1200 MPa (ISO 527-2)
- Strain at Break: 140% (ISO 527-2)
- Flexural Strength: 35 MPa (ISO 178)
- Flexural Modulus: 1100 MPa (ISO 178)
- Charpy Notched Impact Strength: 20 kJ/m² (ISO 179/1eA)
Thermal Properties
- Heat Deflection Temperature: 60°C at 1.8 MPa, unannealed (ISO 75)
Flame Characteristics
- UL Flame Rating: HB class (UL 94)
Injection Molding Conditions
- Material Drying Temperature: 80–90°C
- Material Drying Time: 2–4 hours
- Nozzle Temperature: 180–200°C
- Front Section Temperature: 180–200°C
- Center Section Temperature: 170–190°C
- Rear Section Temperature: 160–180°C
- Melt Temperature: 170–200°C
- Mold Temperature: 60–90°C
- Precision Parts Mold Temperature: Up to 120°C
- Injection Pressure: 50–100 MPa
- Holding Pressure: 30–80 MPa
- Back Pressure: 0–0.5 MPa
- Screw Rotational Speed: 50–120 rpm
Use & Applications
- Spoiler Clip
- Bumper Clip
- Mudguard Clip
- Gear
- Sleeve
- Gasket