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Ensinger PEI

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Lehmann & Voss LUVOCOM® 20-0778/BK Polyphthalamide with glass fiber and PTFE
Categories: Polymer; Thermoplastic; Polyphthalamide (PPA); Polyphthalamide (PPA), Glass/PTFE Filled

Material Notes: Properties/attributes include: Very strong and stiff parts; low coefficient of thermal expansion. Low influence from moisture and temperature to measures and electrical properties, compared with PA66 Suitable for metal inserts. Improved friction and wear behavior. Emergency (dry) running property.

Automotive industry, textile- and office machinery, apparatus- and precision engineering. Typical uses include: Bearings, sleeves, sliding elements, control disks, gear wheels, duty parts in switches.

Processing: During processing the moisture level should not exceed 0.05%, otherwise molecular degradation and surface defects (e.g. smearing) may occur. Processing temperatures above 340°C may very rapidly cause thermal damage and should therefore be avoided. The processing notes provided merely represent a recommendation for general use. Due to the large variety of machines, geometries and volumes of parts, etc., it may be necessary to employ different settings according to the specific application. High-temperature polymers place increased demands on the tool steels employed.

Information provided by Lehmann & Voss & Co.KG

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.56 g/ccISO 1183
Moisture Absorption <= 0.300 %
@Temperature 23.0 °C,
Time 86400 sec
Linear Mold Shrinkage 0.0020 - 0.0060 cm/cmDIN 16901
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength 195 MPaISO 527-2
Elongation at Break 2.0 %ISO 527-2
Modulus of Elasticity 12.0 GPaISO 527-2
Flexural Strength 275 MPaISO 178
Flexural Modulus 10.0 GPaISO 178
Flexural Strain at Break 2.5 %Flexural Elongation @ Fmax; ISO 178
Charpy Impact Unnotched 40.0 kJ/m²
@Temperature -30.0 °C
ISO 179
 45.0 kJ/m²
@Temperature 23.0 °C
ISO 179 1fu
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity >= 1.00e+12 ohm-cmIEC 60167
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 165 °CContinuous; UL 746B
 195 °CShort Term
Deflection Temperature at 1.8 MPa (264 psi) 270 °CISO 75-2/A
Vicat Softening Point 295 °CVST A; DIN ISO 306
 
Processing PropertiesOriginal ValueComments
Nozzle Temperature 320 - 330 °C
Zone 1 320 - 340 °C
Zone 2 320 - 345 °C
Zone 3 325 - 350 °C
Melt Temperature 330 °C
Mold Temperature 135 - 160 °C
Drying Temperature 80.0 °C
@Time >=57600 sec
Dehumidifying dryer
 105 °C
@Time 14400 - 18000 sec
Vacuum Dryer
Moisture Content <= 0.050 %
 
Descriptive Properties
Colorblack

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