Polypropylene is an economical material that offers a combination of outstanding physical, mechanical, thermal, and electrical properties not found in any other thermoplastic. Compared to low or high density polyethylene, it has a lower impact strength, but superior working temperature and tensile strength. Noted for its excellent chemical resistance in corrosive environments, Polypropylene provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It is light in weight, resistant to staining, and has a low moisture absorption rate.
Polypropylene is available in two basic types as either homopolymer or copolymer material. Although similar in many respects each type exhibits distinct differences in both appearance and performance.
Polypropylene Homopolymer (PPH) is the most widely utilized. PPH offers a high strength to weight ratio and is stiffer and stronger than copolymer, this combined with good chemical resistance and weldability allows this material to be used in many corrosion resistant structures.
Polypropylene copolymer (PPC) is a bit softer but have better impact strength, is tougher and more durable than homopolymer polypropylene. Copolymer polypropylene tends to have better stress crack resistance and low temperature toughness than homopolymer at the expense of quite small reductions in other properties.
A large number of end use applications for PP are possible by tailoring grades with specific molecular properties and additives during its manufacture. Contact an Emco Industrial Plastics representative who can help you choose the correct material to meet the needs of your applications.
Brand Names
Inertec 200
Protec®
Proteus®
Versadur® 570
Emco Industrial Plastics doesn’t claim to represent all of the manufacturers or trade name products listed. This list is intended as a guide of typical materials available for purchase from Emco Industrial Plastics, Inc. For additional information, contact an Emco Industrial Plastics representative with the form below.
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Properties
Physical Properties
Units
ASTM
Results
Density
lb/in³
D792
0.033
Water Absorption, 24 hrs
%
D570
0.01
Mechanical Properties
Units
ASTM
Results
Tensile Strength @yield
psi
D638
4800
Tensile Elongation @Yield
%
D638
23
Flexural Strength
psi
D790
5400
Flexural Modulus
psi
400000
160000
Compressive Strength
psi
D695
6000
Hardness, Rockwell R
D785
80
IZOD Impact Strength Notched
ft-lb/in
D256
7.5
Thermal Properties
Units
ASTM
Results
Coefficient of Linear Thermal Expansion
(x 10⁻⁵in./in./°F)
D256
6.6
Heat Deflection Temp at 66 psi
°F
D648
173
Heat Deflection Temp at 264 psi
°F
110
Melting Temperature
°F
D3418
327
Max Operating Temp
°F
170
Flammability Rating
UL94
NR
Electrical Properties
Units
ASTM
Results
Dielectric Strength 1/8″ th.
V/mil
D149
475
Dielectric Constant
D150
2.2 – 2.36
Dissipation Factor @ 1 Hz
D150
0.0017
Volume Resistivity, 50% RH
ohm-cm
D257
2 x 10¹⁶
Arc Resistance
sec
D495
100
NOTE: The property values presented above are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.
Applications
Pump components, impellers, and casings
Liners and covers
Fume hoods and ducts
Structural tanks for chemicals
Industrial battery cases
Orthotics
Advantages
Resists most acids, alkalis and solvents
No moisture absorption
USDA and FDA approved for use in food processing industries
Formable, machineable, and weldable
Impact and abrasion resistant
Stress crack resistant
Excellent insulating properties
Excellent dielectric properties
Grades
Copolymer
Homopolymer
Flame/Fire Retardant
NOTE: Several grades of this material are available. For additional information regarding this plastic, contact your Emco Industrial Plastics representative or call 973-862-4148.
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Polypropylene is an economical material that offers a combination of outstanding physical, mechanical, thermal, and electrical properties not found in any other thermoplastic. Compared to low or high density polyethylene, it has a lower impact strength, but superior working temperature and tensile strength. Noted for its excellent chemical resistance in corrosive environments, Polypropylene provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It is light in weight, resistant to staining, and has a low moisture absorption rate.