Acetal - Polyacetal

Strong, hard and form-retaining

Acetal (Polyacetal) is a strong, hard dimensionally stable plastic with very low frictional resistance. The static and dynamic coefficients of friction are equal, which means 'stick slip' is virtually impossible. 

Acetal is also easy to machine mechanically and boasts good chemical resistance to oils and fuels. Its low moisture absorption and excellent mechanical properties guarantee products that remain true to size. Acetal is widely used in machine construction.

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Unique features

  • Operating temperature -40 to +120 °C
  • Highly dimensionally stable
  • Wear, impact and shock resistant
  • Excellent mechanical processing
  • Resistant to organic solvents

Applications

  • Food industry
  • Mechanical engineering
  • Precision parts
  • Gears, racks
  • Bearings

Machining options

  • Gluing
  • Water jet cutting
  • Laser cutting
  • Welding
  • Warm bending
  • Cold bending
  • Thermoforming
  • Yes
  • Not in all cases
  • No

How to identify Acetal

Acetal is standard available in the colours black, natural and blue. Due to the specific mass of 1.41 grams per cubic centimeter, Acetal sinks. At the same time, this makes the material relatively heavy compared to other technical plastics.

Furthermore, Acetal is hard and robust. Due to its stiffness, the material is not easy to bend. During machining, Acetal shows short chips.

What are the main technical properties of Acetal?

Acetal is a widely used material in mechanical engineering.

The material is characterised by high dimensional and shape retention. Acetal also has good rolling properties.

Acetal is hard and at the same time impact-resistant and easy to machine.

The Acetal FoodGrade variant is suitable for direct contact with foodstuffs.

What are the main technical properties of Acetal?

Acetal is a widely used material in mechanical engineering.

The material is characterised by high dimensional and shape retention. Acetal also has good rolling properties.

Acetal is hard and at the same time impact-resistant and easy to machine.

The Acetal FoodGrade variant is suitable for direct contact with foodstuffs.

How to identify Acetal

Acetal is standard available in the colours black, natural and blue. Due to the specific mass of 1.41 grams per cubic centimeter, Acetal sinks. At the same time, this makes the material relatively heavy compared to other technical plastics.

Furthermore, Acetal is hard and robust. Due to its stiffness, the material is not easy to bend. During machining, Acetal shows short chips.

Technical information

  • General
    Definition Norm Unit Value
    Density ISO 1183 g/cm³ 1.41
    Moisture absorption in normal climate - % 0.25
    Fire rating DIN 4102 - HB
    Specific heat capacity - kj/Kg°C 1.5
  • Mechanical
    Definition Norm Unit Value
    Tensile strength DIN 53455 N/mm 70
    Elongation to break DIN 53455 40
    E-Module DIN 53457 (23°C) N/mm²  3100
    bending strength DIN 53452 N/mm²  115
    Impact strength DIN 53453 (23°C) Charpy 8
    Shore or ball pressure hardness Shore °D 83
    Coefficient of friction 0.36
  • Electrical
    Definition Norm Unit Value
    Relative electrical constant DIN 53485 (100Hz) 100 Hz 3.4
    Dielectric loss factor DIN 53483 (100Hz) tan (..x10-³ 0.003
    Specific resistance DIN 53482 16 cm 10
    Surface resistance DIN 53482 13 10
    Creep current resistance DIN 53480 KC >600
    Breakdown voltage DIN 53481 kV/mm 50
  • Thermal
    Definition Norm Unit Value
    Crystalline melting point °C 165
    Heat conductivity DIN 52162 W/m°K 0.31
    Linear coefficient of expansion DIN 53762 mm/m°C 0.1
    Long-term no-load operating temperature °C -50/100
    Maximum short-term operating temperature °C 140
    Heat deformation DIN 53461 °C 125
  • Temperature range
    Minimum temperature Maximum temperature
     -50°C  +100°C

Machining data

  • Circular sawing
    Clearance angle (α) 20 - 30 [o]
    Rake angle (λ) 0 - 5 [o]
    Cutting speed 500 - 800 [m/min]
    Tooth pitch 2 - 8 [mm]
  • Band sawing
    Clearance angle (α) 20 - 30 [o]
    Rake angle (λ) 0 - 5 [o]
    Cutting speed 500 - 800 [m/min]
    Tooth pitch 2 - 8 [mm]
  • Drilling
    Clearance angle (α) 5 - 10 [o]
    rake angle (λ) 15 - 30 [o]
    Top angle (φ) 90 [o]
    Cutting speed 50 - 200 [m/min]
    Start 0.1 - 0.5 [mm/rev]
  • Turning
    Clearance angle (α) 5 - 8 [o]
    rake angle (λ) 0 - 5 [o]
    Setting angle (χ) 45 - 60 [o]
    Cutting speed 300 - 600 [m/min]
    Start 0.1 - 0.2 [mm]
  • Milling
    Clearance angle (α) 5 - 15 [o]
    Rake angle (λ) 5 - 15 [o]
    Cutting speed 250 - 500 [m/min]
    Start 0.1 - 0.5 [mm/rev]