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GEHR POM® C is produced from the continuous operating temperature of this engineering plastic ranges between -40 °C and +100 °C. Based on its toughness combined with high dimensional stability, there is no tendency to stress cracking. The copolymer has high thermal stability and chemical resistance. In particular, the increased hydrolytic stability and resistance to contact with many solvents must be taken into account. This material is frequently found in applications in the food industry, as cleaning processes require resistance to the use of hot water or various chemical agents. Our round rods and sheets in natural or black color comply with the food contact regulations according to 10/2011/EC.

Polymer Name: Polyacetal Copolymer (POM)

Physical Form: Bars, Custom, Rods, Sheets

Features: Chemical Resistant, Dimensional Stability, Electrically Insulating, Excellent Toughness, Good Environmental Stress Crack Resistance (ESCR), Good Sliding Properties, Good Solvent Resistance, Good Thermal Stability, High Hydrolytic Stability, High Rigidity, High Stiffness, High Strength, Low Water Absorption

Density: 1390.0 - 1390.0 kg/m³

Color: Black, Natural

Technical Data Sheet
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Identification & Functionality

Technologies

Features & Benefits

Properties
  • Pressure tested quality
  • High strength and stiffness
  • High rigidity (to -40 °C)
  • High thermal stability
  • Low water absorption
  • High dimension stability
  • Good electrical insulating properties
  • Very good sliding properties
  • High resistance to solvents
  • Very high resistance to stress cracks

Applications & Uses

Plastics & Elastomers Processing Methods
Applications
  • Bearings
  • Fittings
  • Gear wheels
  • Parts for pumps
  • Screws
  • Bobbins
  • Parts for the textile industry
  • Carrier for coating lines
  • Food industry
  • Components in medical technology and photovoltaics as well as the electrical industry
  • Components for filtration systems
  • Reactor housings
  • Sealing disks (mostly made of calendered sheets)

Properties

Flame Rating
Form and Condition
Rods. Sheets. Hollow Rods / Solid
Odor
Odorless
Insoluble in
Water
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strength at Yield67MPaISO 527
Elongation at Yield (S)22%ISO 527
Tensile Strength at Break65MPaISO 527
Elongation at Break (R)28%ISO 527
Impact Strength (an)No breakkJ/m2ISO 179
Notch impact Strength (ak)6kJ/m2ISO 179
Ball Indentation (Rockwell Hardness)125MPaISO 2039
Hardness83Shore DISO 868
Modulus of elasticity (Et)2855MPaISO 527
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.39ISO 1183
Water Absorption0.8%ISO 62
Humidity Absorption0.2%ISO 62
Maximum Permissible Service Temperature100°CUL746B
Lower Permissible Service Temperature-40°CUL746B
Thermal Properties
ValueUnitsTest Method / Conditions
Vicat Softening Point (VST/B/50)150°CISO 306
Heat Deflection Temperature (HDT/B)155°CISO 75
Heat Deflection Temperature (HDT/A)95°CISO 75
Coefficient of Linear Thermal Expansion1.2K-1.10-4ISO 11359
Glass Transition Temperature (Tg)-65°CISO 3146
Melting Temperature (Tm)166°CISO 3146
Typical Properties
ValueUnitsTest Method / Conditions
Density1.39g/cm³
Melting Temperature160 - 175°C
Thermal Decompositionmin. 240°C
Ignition Temperature320 - 340°C
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivitymin. 10^13Ω.cmIEC 60093
Surface Resistivity (Ro)min. 10^13ΩIEC 60093
Dielectric Constant (1MHz)38-IEC 60250
Dielectric Loss Factor (1 MHz)5-IEC 60250
Dielectric Strength40kV/mmIEC 60243-1
Tracking ResistanceCTI 600VIEC 60112
Additional Information
ValueUnitsTest Method / Conditions
Physiological Indifference (EEC)Yes-
Physiological Indifference (FDA)Yes-
FlammabilityHB-UL 94
Limiting Oxygen Index (LOI, 9)18%ASTM D2863

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Fire-fighting Measures

Suitable extinguishing agents

Water, foam, dry chemical, carbon dioxide (CO2).

Potential combustion products

Carbon dioxide (CO2), carbon monoxide (CO). Formation of further decomposition and oxidation products depend upon the fire conditions. Under special fire conditions traces of other toxic substances are possible.

Special protective equipment

Wear a self-contained breathing apparatus. If exposed to combustion fumes bring the victim into fresh air.

Further information

Dispose of fire debris and contaminated extinguishing water in accordance with official regulations..

Safety & Health

Safety Measures

The general industrial safety measures should be considered. A thermal damage during machining should be avoided.

Storage & Handling

Machining

The product can be machined with standard machinery and tools. Before machining the product should be stored at room temperature 24 h. Evacuate swarf to prevent slipping or tripping. Observe the maximum allowable concentration of dust and formaldehyd levels on the working area which apply in your country. Wear safety goggles during machining. General dust limit value: Respirable dust (6 mg/m3); Inhalable dust (10 mg/m3 ).

Storage

The products shall be stored indoor to keep away from any source of degradation such as sunlight, UV-jets, ionizing radiation, chemicals.