Celanese Hostaform C 9021 GV1/30 POM

2.1 Physical Properties

The physical properties of Hostaform C 9021 GV1/30 are fundamental characteristics that dictate the material's weight, its flow behavior during the molding process, and the ultimate dimensional stability of the final product.

Its density of 1600 kg/m³ confirms the significant contribution of glass fibers. The Melt Volume Rate (MVR) of 4 cm³/10min at 190 °C indicates good flowability. Anisotropic molding shrinkage (0.6% parallel, 1.0% normal to flow) is a key consideration for precision part design due to glass fiber alignment. Low water absorption (0.9% at 23°C saturation) ensures consistent performance in humid environments.

2.2 Mechanical Properties

The mechanical properties quantify the material's response to applied forces, crucial for ensuring structural integrity. It boasts a high tensile modulus of 9200 MPa and tensile stress at break of 135 MPa, significantly higher than unreinforced POM. While ductility is reduced (2.5% tensile strain at break), its excellent tensile creep modulus (7700 MPa after 1h, 5400 MPa after 1000h) ensures shape retention under sustained loads.

Flexural modulus at 23°C is 7800 MPa and flexural strength is 165 MPa, highlighting its rigidity. Charpy impact strength is 30 kJ/m² (unnotched at 23°C), increasing to 35 kJ/m² at -30°C, but notched impact strength is lower (8 kJ/m²), emphasizing the need for careful design to avoid stress concentrators. Ball indentation hardness is 200 MPa, indicating high surface hardness.

2.3 Thermal Properties

Understanding thermal behavior is essential for high-temperature applications. The melting temperature is 166 °C. Its Deflection Temperature Under Load (DTUL) is exceptionally high at 160 °C (1.8 MPa) and 125 °C (8.0 MPa), indicating excellent stiffness retention under heat and load, making it suitable for hot environments like automotive under-the-hood components.

The Coefficient of Linear Thermal Expansion (CLTE) is anisotropic (0.4 E-4/°C parallel, 0.8 E-4/°C normal to flow), a critical factor for precision assemblies. Flammability is rated UL 94 HB, and it has a UL 746 B temperature index of 105 °C for electrical and 95/100 °C for mechanical applications, confirming its suitability for regulated sectors.

2.4 Electrical Properties

Hostaform C 9021 GV1/30 serves as an excellent electrical insulator. It maintains a relative permittivity of 4.3 at both 100Hz and 1MHz. While the dissipation factor increases with frequency (30 E-4 at 100Hz to 60 E-4 at 1MHz), its high volume resistivity (1E12 Ohm*m) and surface resistivity (1E14 Ohm) ensure robust insulation.

An electric strength of 40 kV/mm and a Comparative Tracking Index (CTI) of 600 further support its use in demanding electrical and electronic applications where high mechanical strength is also required.

4.1 Key Application Areas

Hostaform C 9021 GV1/30 is designed for molded parts demanding very high strength, rigidity, and superior hardness. Its robust properties and dimensional stability make it suitable for high-performance engineering applications across several sectors:

• Automotive Engineering: Ideal for under-the-hood components and critical mechanical systems requiring high structural integrity under varying temperatures and loads. Complies with BMW GS 93016, Bosch N28 BN22-X010, and FMVSS 302 burning rate.
• Precision Engineering: Perfect for components where tight tolerances and consistent dimensions are critical, such as small gear wheels, fasteners, and intricate mechanical parts.
• Electric and Electronic Industry: Excellent electrical insulation combined with mechanical strength and thermal stability makes it suitable for connectors, switches, and structural elements in electronic devices.
• Domestic Appliances: Its durability, hardness, and resistance to wear and chemicals ensure long-term reliability for various appliance parts.

4.2 Industry Standards and Certifications

Hostaform C 9021 GV1/30 complies with stringent industry standards and regulatory requirements:

• UL Registration and Flammability: UL 94 HB for thicknesses >1.57 mm (all colors), indicating slow burning and self-extinguishing properties.
• UL Temperature Index: UL 746 B with electrical rating of 105 °C, and mechanical ratings of 95 °C (tensile impact) and 100 °C (tensile) for continuous service.
• Automotive Standards: Complies with ISO 3795 and FMVSS 302 burning rate (<100 mm/min for >1 mm thickness). Meets specific OEM specs like BMW GS 93016 and Bosch N28 BN22-X010.
• Environmental and Food Contact Regulations: RoHS compliant (for variant 3133). Meets BgVV recommendation XXXIII for consumer goods, European Food Regulation EU 10/2011, and FDA Food Regulation FDA21CFR 177.2470.