Hippe PET Polyethylene Terephthalate

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Hippe PET Polyethylene Terephthalate (discontinued **)
Categories:	Polymer; Thermoplastic; Polyester, TP; Polyethylene Terephthalate (PET)
Material Notes:	Linear, saturated polyesters are thermoplastics which are used where good dimensional accuracy, high creep resistance and good sliding and wear behavior are required. Partially crystallized PET possesses high hardness, strength at high temperatures and resistance against stress cracking. Information provided by Hippe.
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Physical Properties	Original Value	Comments

Specific Gravity	1.37 g/cc	DIN 53 479
Moisture Absorption at Equilibrium	0.30 %	Absorption of humidity in standard operating environment; DIN 53 715
Water Absorption at Saturation	0.50 %	DIN 53 495

Mechanical Properties	Original Value	Comments
Ball Indentation Hardness	145 MPa @Time 30.0 sec	DIN 53 456
Tensile Strength	80.0 MPa	DIN 53 455
Elongation at Break	70 %	DIN 53 455
Tensile Modulus	2.80 GPa	DIN 53 457
Charpy Impact, Notched	NB	DIN 53 453
Coefficient of Friction, Dynamic	0.25	Against steel, p=0.05 N/mm², v=0.6 m/s, hardened and ground
Abrasion	0.35	µm/km; Against steel, p=0.05 N/mm², v=0.6 m/s, hardened and ground

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm	DIN 53 482, VDE 0303, Part 3
Surface Resistance	1.00e+14 ohm	DIN 53 482
Dielectric Constant	3.2 @Frequency 1e+6 Hz	DIN 53 483, IEC-250
Dielectric Strength	30.0 kV/mm	Breakdown; DIN 53 481, IEC-243, VDE 0303 Part 1
Dielectric Loss Index	0.021 @Frequency 1e+6 Hz	DIN 53 483, IEC-250

Thermal Properties	Original Value	Comments
CTE, linear	70.0 - 80.0 µm/m-°C
Specific Heat Capacity	1.10 J/g-°C
Thermal Conductivity	0.240 W/m-K
Melting Point	255 °C	DIN 53 736
Maximum Service Temperature, Air	110 °C	Continuous use
	180 °C	Short Periods
Deflection Temperature at 0.46 MPa (66 psi)	170 °C	ISO-R 75 Method B
Deflection Temperature at 1.8 MPa (264 psi)	75.0 °C	ISO-R 75 Method A
Glass Transition Temp, Tg	69.0 °C	dynamic; DIN 53 736
Flammability, UL94	HB

Descriptive Properties
Color	natural/black
Creep Resistance	Grade CTI 350	DIN 53 480, IEC-112, VDE 0303 Part 1
Resistance to hot water, suds	not resistant

**
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PHIPPE987 / 121991

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