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Ensinger PEI

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Hippe PBT Polybutylene Terephthalate  (discontinued **)
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)
Material Notes: The mechanical properties of PBT are generally inferior to the partially crystallized PET, however, PBT is more easily machined.

Information provided by Hippe.
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Physical PropertiesOriginal ValueComments
Specific Gravity 1.30 g/ccDIN 53 479
Moisture Absorption at Equilibrium 0.25 %Absorption of humidity in standard operating environment; DIN 53 715
Water Absorption at Saturation 0.50 %DIN 53 495
 
Mechanical PropertiesOriginal ValueComments
Ball Indentation Hardness 115 MPa
@Time 30.0 sec		DIN 53 456
Tensile Strength 52.0 MPaDIN 53 455
Elongation at Break 200 %DIN 53 455
Tensile Modulus 2.60 GPaDIN 53 457
Charpy Impact, Notched NBDIN 53 453
Coefficient of Friction, Dynamic 0.24Against steel, p=0.05 N/mm², v=0.6 m/s, hardened and ground
Abrasion 0.20µm/km; Against steel, p=0.05 N/mm², v=0.6 m/s, hardened and ground
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+16 ohm-cmDIN 53 482, VDE 0303, Part 3
Surface Resistance >= 1.00e+14 ohmDIN 53 482
Dielectric Constant 3.0
@Frequency 1e+6 Hz		DIN 53 483, IEC-250
Dielectric Strength >= 45.0 kV/mmBreakdown; DIN 53 481, IEC-243, VDE 0303 Part 1
Dielectric Loss Index 0.012
@Frequency 1e+6 Hz		DIN 53 483, IEC-250
 
Thermal PropertiesOriginal ValueComments
CTE, linear 70.0 µm/m-°C
Specific Heat Capacity 1.21 J/g-°C
Thermal Conductivity 0.210 W/m-K
Melting Point 225 °CDIN 53 736
Maximum Service Temperature, Air 110 °CContinuous use
 180 °CShort Periods
Deflection Temperature at 0.46 MPa (66 psi) 165 °CISO-R 75 Method B
Deflection Temperature at 1.8 MPa (264 psi) 65.0 °CISO-R 75 Method A
Glass Transition Temp, Tg 22.0 °Cdynamic; DIN 53 736
Flammability, UL94 HB
 
Descriptive Properties
Creep ResistanceGrade CTI 600DIN 53 480, IEC-112, VDE 0303 Part 1
Resistance to hot water, sudsnot resistant

**
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