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PET

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PET(polyethylene terephalate)

PET is an unreinforced, semi-crystalline thermo-plastic polyester derived from polyethylene terephthalate. Its excellent wear resistance, low coefficient of friction, high flexural modulus, and superior dimensional stabilty make it a versatile material for designing mechanical and electro-mechanical parts. Because PET has no centerline porosity, the possibilty of fluid absorption and leakage is virtually eliminated.

Typical Property Values

Physical Properties
ASTM Test Method
Units
PET
Density
D792
lbs/cu in.3
0.0499
Water absorption, 24 hours
D570
%
.10
Mechanical Properties
ASTM Test Method
Units
PET
Specific Gravity
D792
g/cu cm.3
1.38
Tensile Strength at break, 73°F
D638
psi
11,500
Tensile Modulus, 73°F
D638
psi
4 X 105
Elongation at break, 73°F
D638
%
70
Flexural Strength, 
73°F
D790
psi
15,000
Flexural Modulus, 73°F
D790
psi
4 X 105
Izod Impact Strength, Notched, 73°F
D256
ft-lbs/in.
0.7
Rockwell Hardness
D785
—-
R117
Coefficient of Friction @ 40psi, 50 fpm
—-
Static/Dynamic
0.19/0.25
Thermal Properties
ASTM Test Method
Units
PET
Heat Deflection, 264 psi
D648
°F
175
Melting Point
—-
°F
490
Coefficient of Linear Thermal Expansion
D696
in./in./-°F
3.9 X 10-5
Applicable Temp. Range for Thermal Expansion
—-
°F
50 – 250
Max. Serving Temperature for Long Term
—-
°F
230
Flammability
UL94
—-
HB
Electrical Properties
ASTM Test Method
Units
PET
Volume Resistivity, 73°F
D257
ohm-cm
1016
Dielectric Constant @ 60 Hz, (73°F, 50% RH)
D150
—-
3.4
Dissipation Factor, @ 60 Hz, 73°F 
D150
—-
0.002
Dielectric Strength
D149
V/mil
400

Material Availability:

Rods: Diameters 1/4″ to 6 ”  – Length: 10 feet
Plates: 1/4″ to 2″ thickness inclusive are 24 X 48 inches
2 1/4 ” to 4″ thickness inclusive are 12 X 48 inches
Profiles, tubes and special sizes are custom-produced on request

This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved.

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