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GEHR PEI® has a high mechanical strength in connection with a good chemical and heat resistance (operating temperature up to +170 °C), good dimensional stability and creep resistance. lts unique torque strength permits the economical substitution of machined fabricated small parts from steel.

Polymer Name: Polyether Imide (PEI)

Physical Form: Custom, Rods, Sheets

Features: Chemical Resistant, Creep Resistant, Dimensional Stability, Good Environmental Stress Crack Resistance (ESCR), Good Thermal Stability, Good Weather Stability, Heat Resistance, High Hardness, High Rigidity, High Strength

Density: 1270.0 - 1270.0 kg/m³

Color: Black

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Technologies

Features & Benefits

Properties
  • Very high strength and rigidity
  • High creep resistance
  • High torque strength and hardness
  • High thermostability
  • High weather resistance
  • High radiation resistance against γ-rays
  • Self-extinguishing
  • Limited resistance to stress cracks

Applications & Uses

Plastics & Elastomers Processing Methods
Applications
  • Parts for electrical engineering
  • Parts for food industry
  • Parts for aircraft construction
  • Dosing stations
  • Fixings and spacers
  • Flanges and sleeves
  • Valves
  • Gear wheels

Properties

Color
Flame Rating
Physical Form
Form and Condition
Rods. Sheets / Solid
Odor
Odorless
Insoluble in
Water
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.27-ISO 1183
Water Absorption1.3%ISO 62
Humidity Absorption0.25%ISO 62
Maximum Permissible Service Temperature170°CUL746B
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strength at Yield110MPaISO 527
Elongation at Yield (S)6%ISO 527
Tensile Strength at Break85MPaISO 527
Elongation at Break (R)min. 30%ISO 527
Impact Strength (an)115kJ/m2ISO 179
Ball Indentation (Rockwell Hardness)220 (M 109)MPaISO 2039
Hardness87Shore DISO 868
Flexural Strength (B 3,5 %)165MPaISO 178
Modulus of elasticity (Et)3450MPaISO 527
Thermal Properties
ValueUnitsTest Method / Conditions
Vicat Softening Point (VST/B/50)250°CISO 306
Vicat Softening Point (VST/B/50)211°CISO 306
Vicat Softening Point (VST/A/50)215°CISO 306
Heat Deflection Temperature (HDT/B)200°CISO 75
Heat Deflection Temperature (HDT/A)190°CISO 75
Coefficient of Linear Thermal Expansion0.56K-1.10-4ISO 11359
Thermal Conductivity (20°C)0.24W/(m.K)ISO 22007-4
Glass Transition Temperature (Tg)217°CISO 3146
Melting Temperature (Tm)217°CISO 3146
Typical Properties
ValueUnitsTest Method / Conditions
Density1.27g/cm³-
Thermal Decompositionmin. 480°C-
Ignition Temperaturemin. 535°C-
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivitymin. 10^13Ω.cmIEC 60093
Surface Resistivity (Ro)min. 10^13ΩIEC 60093
Dielectric Constant (1MHz)2.9-IEC 60250
Dielectric Loss Factor (1 MHz)13-IEC 60250
Dielectric Strength33kV/mmIEC 60243-1
Tracking ResistanceCTI 125VIEC 60112
Additional Information
ValueUnitsTest Method / Conditions
BondabilityYes--
Physiological Indifference (FDA)Yes--
FlammabilityV-0 7)-UL 94
Limiting Oxygen Index (LOI, 9)47%ASTM D2863
UV Stabilisation (6, 9)Yes--

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.