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Polypropylene Specifications
- Jun 10, 2017 -

GENERAL DESCRIPTION 

Polypropylene is an economical material that offers a combination of outstanding physical, chemical, 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.


GENERAL PROPERTIES

Polypropylene provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It has a lower impact strength, but its working temperatures and tensile strength are superior to low or high density polyethylene. It is light in weight, resistant to staining, and has a low moisture absorption rate. This is a tough, heat-resistant, semi-rigid material, ideal for the transfer of hot liquids or gases. It is recommended for vacuum systems and where higher heats and pressures are encountered. It has excellent resistance to acids and alkalines, but poor resistance to aromatic, aliphatic and chlorinated solvents.


FEATURES

• Lightweight • High tensile strength • Impact resistant • High compressive strength • Excellent dielectric properties • Resists most alkalis and acids • Resists stress cracking • Retains stiffness and flex • Low moisture absorption • Non-toxic • Non-staining • Easily fabricated • High heat resistance.


FABRICATION TECHNIQUES

• Hot gas welding • Spin welding • Fusion & butt welding • Machining with wood or metal working tools • Vacuum forming • Ultra-sonic sealing


THERMO-FORMED APPLICATIONS

• Chemical resistant tanks & linings  • Laboratory consoles, sinks & ducts • Plating barrels & tanks • Lavatory partitions • Filter press plates • Railroad crossing components • Pump components & housings • Prosthetic devices • Die cutting pads • Clean room walls, floors & ceilings 


TYPICAL PROPERTIES of POLYPROPYLENE 

ASTM or UL testPropertyHomopolymerCo-PolymerFlame
Retardant
PHYSICAL



D792Density (lb/in³)
(g/cm³)
0.033
0.905
0.033
0.897
0.035
0.988
D570Water Absorption, 24 hrs (%)<0.010.010.02
MECHANICAL



D638Tensile Strength (psi)4,8004,8004,300
D638Tensile Modulus (psi)195,000--
D638Tensile Elongation at Yield (%)122328
D790Flexural Strength (psi)7,0005,400-
D790Flexural Modulus (psi)180,000160,000145,000
D695Compressive Strength (psi)7,0006,000-
D695Compressive Modulus (psi)---
D785Hardness, Rockwell R9280-
D256IZOD Notched Impact (ft-lb/in)1.97.50.65
THERMAL



D696Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
6.26.6-
D648Heat Deflection Temp (°F / °C)
at 66 psi
at 264 psi

210 / 99
125 / 52

173 / 78
110 / 43

106 / 41
57 / 14
D3418Melting Temperature (°F / °C)327 / 164327 / 164327 / 164
-Max Operating Temp (°F / °C)180 / 82170 / 77180 / 82
C177Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10-4 cal/cm-sec-°C)

0.76-0.81
2.6-2.8

-
-

-
-
UL94Flammability RatingHBn.r.V-O
ELECTRICAL



D149Dielectric Strength (V/mil) short time, 1/8" thick500-660475500-650
D150Dielectric Constant at 1 kHz2.252.2-2.362.3
D150Dissipation Factor at 1 kHz0.0005-0.00180.0017-
D257Volume Resistivity (ohm-cm) at 50% RH8.5 x 10142 x 10161015
D495Arc Resistance (sec)160100-

NOTE: The information contained herein 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.

POLYSTONE is a registered trademark of Roechling Plastics.

PROPYLUX is a registered trademark of Westlake Plastic Company.

PROTEUS and LSG are registered trademarks of Quadrant EPP USA, Inc.

TECAPRO is a registered trademark of Ensinger Company.