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PP
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  Kianco Polymers PP Product
 

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.

Polypropylene possesses excellent resistance to organic solvents, degreasing agents and electrolytic attack. It has a lower impact strength, but it's 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 alkalies, but poor aromatic, aliphatic and chlorinated solvent resistance.

Typical properties of polypropylene
ASTM or UL test Property Unmodified resin
PHYSICAL
D792 Specific gravity 0.905
D792 Specific volume (in.³/lb.) 30.8-30.4
D570 Water absorption, 24 hours, 1/8 inch thick (%) 0.01-0.03
MECHANICAL
D638 Tensile strength (psi) 5,000
D638 Elongation (%) 10-20
D638 Tensile modulus (10~5 psi) 1.6
D790 Flexural modulus (10~5 psi) 1.7-2.5
D256 Impact strength, izod (ft-lb/in. of notch) 0.5-2.2
D785 Hardness, Rockwell R 80-110
THERMAL
C177 Thermal conductivity (10~4 cal-cm/sec-cm~2-°C) 2.8
D696 Coefficient of thermal expansion (10~5 in./in.-°F) 3.2-5.7
D648 Deflection temperature (°F)
At 264 psi
At 66 psi

125-140
200-250
UL94 Flammability rating HB
ELECTRICAL
D149 Dielectric strength (V/mil) short time, 1/8-in. thick 500-660
D150 Dielectric constant At 1kHz 2.2-2.6
D150 Dissipation factor At 1kHz 0.0005-0.0018
D257 Volume resistivity (ohm-cm) At 73°F, 50% RH 10~17
D495 Arc resistance(s) 160

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:
Polypropylene can be easily fabricated using the following techniques: Hot gas welded, Spin welded, Fusion and butt welded, Machined with wood or metal working tools, Vacuum formed, Ultra-sonic sealed...

Thermo-formed Applications:
Chemical resistant tanks and linings, Laboratory consoles, sinks and ducts, Plating barrels and tanks, Lavatory partitions, Filter press plates, Railroad crossing components, Pump components and housings, Prosthetic devices, Die cutting pads, Clean room walls, floors and ceilings...

PP Testing method Value
Basic property density Kg/m3 ASTMD 1505 905
  Melt flowing speed g/10 mins GB3682 29
  Tensile yield strength Mpa GB1040 23
  Elongation % GB1040 50
  Izod impact J/m ASTMD256 65
  hardness R GB9342 85
  Heat distortion temperature ° C ASTMD648 105
Mainly used for High impact resistant refrigerator, washing machine drum and related fittings.
 
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