POM (Polyoxymethylene/Acetal)

POM is an engineering thermoplastic used in precision parts that require high stiffness, low friction, and excellent dimensional stability. It's particularly suitable for technical components with close tolerances.

POM (Polyoxymethylene/Acetal) Material Properties

Mechanical Properties

High stiffness and strength
Excellent dimensional stability
Very low friction coefficient
Good fatigue resistance
High resilience
Excellent spring properties

POM (Polyoxymethylene/Acetal) Thermal Properties

Heat deflection temperature: 110-120°C
Continuous use temperature: up to 100°C
Good creep resistance
Low thermal expansion

POM (Polyoxymethylene/Acetal) Processing Properties

Good dimensional accuracy
Processing temperature: 180-220°C
Low mold shrinkage
Excellent surface finish
Good flow properties
Suitable for tight tolerances

POM (Polyoxymethylene/Acetal) Parts Manufacturing Processes

Injection Molding

Excellent

Advantages

High precision
Good dimensional stability
Excellent surface finish
Low friction

Key Parameters

melt temperature: 180-220°C

mold temperature: 80-120°C

injection pressure: 80-120 MPa

CNC Machining

Excellent

Advantages

Good machinability
High accuracy
Excellent surface finish
Tight tolerances

Key Parameters

cutting speed: 300-500 m/min

feed rate: 0.1-0.2 mm/rev

tool type: Carbide tools

3D Printing

Moderate

Advantages

Prototyping capability
No tooling required
Design freedom
Quick turnaround

Key Parameters

nozzle temperature: 200-220°C

bed temperature: 90-100°C

layer height: 0.1-0.2mm

POM (Polyoxymethylene/Acetal) Technical Specifications

density

1.41-1.42 g/cm³

water absorption

0.2-0.3%

tensile strength

60-70 MPa

flexural modulus

2600-3200 MPa

impact strength

80-240 J/m

heat deflection

110-120°C

coefficient of friction

0.2-0.3

surface hardness

M80-M85 (Rockwell)

Processing Guidelines

molding temperature

180-220°C

mold temperature

80-120°C

drying conditions

80°C for 2-4 hours

injection pressure

80-120 MPa

recommended thickness

0.8-3.0 mm

POM (Polyoxymethylene/Acetal) Parts Industry Applications

Precision Components

Gears and gear wheels
Bearings and bushings
Valve components
Precision fasteners

Automotive

Fuel system components
Window guides
Belt tensioners
Door lock components

Consumer Products

Zipper elements
Watch components
Writing instruments
Kitchen appliance parts

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