Home Glass-filled acetals (POM) Polyoxymethylene Exablend POM 525

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Polyoxymethylene Exablend POM 525

Description

Exablend POM 525 is a glass-filled polyoxymethylene (POM-C, acetal copolymer) with improved injection-molding properties. It combines stiffness, low friction and exceptional dimensional stability — the core advantages of POM — with an increased modulus provided by glass fiber. Ideal for precision parts that require both geometric accuracy and wear resistance. Counterpart of BASF Ultraform N2320 G53 and Celanese Hostaform C9021 GV1/30.

Key properties

The lowest shrinkage anisotropy among glass-filled polymers
Exceptional dimensional stability — precision parts
Low coefficient of friction, high abrasion resistance
Low moisture absorption (<0.2% per 24 h)
High Young's modulus and fatigue strength
High chemical resistance to fuels, oils and solvents

Applications

Precision gears, bushings, plain bearings. Drives in home appliances, automotive and industrial mechanisms.

Automotive. Fuel systems, latches, brackets, locking mechanisms — resistant to gasoline, diesel and ATF.

Electrical engineering. Connector housings, drive housings, brackets — geometric precision.

Industrial equipment. Cams, guides, pins.

Furniture hardware. Precision locks, latches, hinges.

parameter

unit

value

Physical properties:

Delivery form

—

Pellets

Pellet size

2…6

Density

g/cm³

1.60 (ISO 1183-1)

Glass fiber content

25 (ISO 3451-1)

Water absorption (saturation, 23 °C)

0.5 (ISO 62)

Rheological properties:

Melt flow rate (MFR, 200 °C / 2.16 kg)

g/10 min

10 (ISO 1133-1)

Mold shrinkage (flow direction)

0.8 (ISO 294-4)

Mold shrinkage (transverse direction)

0.8 (ISO 294-4)

Mechanical properties:

Tensile strength (conditioned)

MPa

72 (ISO 527-1/-2)

Tensile strength (dry)

MPa

77 (ISO 527-1/-2)

Tensile strength (10-year aging)

MPa

50 (ISO 527-1/-2)

Charpy impact strength (unnotched, 23 °C)

kJ/m²

27 (ISO 179-1/1eU)

Charpy impact strength (unnotched, −40 °C)

kJ/m²

22 (ISO 179-1/1eU)

Unnotched impact strength at maximum moisture absorption, +23 °C

kJ/m²

Impact strength after 10-year artificial aging, +23 °C

kJ/m²

Charpy notched impact strength, +23 °C

kJ/m²

4 (ISO 179-1/1eA)

Charpy notched impact strength, -40 °C

kJ/m²

3 (ISO 179-1/1eA)

Ball indentation hardness, conditioned specimen

MPa

140 (ISO 2039-1)

Ball indentation hardness, dry specimen

MPa

145 (ISO 2039-1)

Flexural stress

MPa

126 (ISO 178)

Elongation at break

2,3 (ISO 527-1/-2)

Compressive modulus, dry specimen

GPa

8,1

Flexural modulus, dry specimen

GPa

7,7 (ISO 178)

Thermal properties:

Melting temperature

°C

178 (ISO 11357-3)

Heat deflection temperature, 1.8 MPa (HDT/A)

°C

120 (ISO 75-2)

Heat deflection temperature, 0.45 MPa (HDT/B)

°C

160 (ISO 75-2)

Coefficient of linear thermal expansion, parallel to flow

µm/(m·K)

100 (ISO 11359-2)

Coefficient of linear thermal expansion, transverse to flow

µm/(m·K)

100 (ISO 11359-2)

Flammability

class

HB (UL 94)

Oxygen index

23 (ISO 4589-2)

Electrical properties:

Dielectric strength

kV/mm

32 (IEC 60243-1)

Volume resistivity

Ω·m

10^12 (IEC 62631-3-1)

Surface resistivity

10^15 (IEC 62631-3-2)

Comparative tracking index (CTI)

600 (IEC 60112)

Typical data for this polymer class, for reference.

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