About

Acetal, also known by the brand name Delrin, is a high-performance engineering thermoplastic known for its excellent dimensional stability, low friction, and high stiffness. It machines cleanly with tight tolerances, making it ideal for precision parts. Acetal exhibits good fatigue and wear resistance, making it well-suited for applications involving sliding motion, such as bushings, gears, and bearings. It resists moisture, solvents, and a range of chemicals, while maintaining mechanical integrity in both dry and humid environments. Though not UV stable or flame retardant by default, Acetal is widely used in automotive, industrial, and consumer product applications requiring durability, machinability, and chemical resistance.

Technical Details

Accuracy

±0.2% (lower limit of ±0.13 mm)

Density

1.41 g/cm³

Min. wall thickness

-

Tensile strength

60 - 70 MPa

Tensile modulus

2600 - 3100 MPa

Tensile elongation

20 - 60%

Flexural strength

80 - 100 MPa

Flexural modulus

2500 - 3000 MPa

HDT (0.45 MPa)

160 - 170°C

HDT (1.8 MPa)

100 - 120°C

Embossing

min. 0.3 mm

Engraving

min. 0.3 mm

Warping risk

N/A