POLY PROPYLENE RODS, SHEETS & MACHINED COMPONENTS

POLY PROPYLENE RODS, SHEETS & MACHINED COMPONENTS

Polypropylene copolymers have outstanding chemical resistance and show the highest resistance of all thermoplastics to organic chemicals. High density polypropylene has some similarity with Polypropylene co-polymers in respect of chemicals resistance, although here again Polypropylene co-polymers possesses the additional advantages of being usable at higher operating temperature. Both the polymers have similar solubility parameters and tend to swell by the same solvents.


In both the cases the absence of any possible interaction between the crystalline polymer and the liquid prevents solution of the polymers in any liquid at room temperature. Polypropylene copolymers also possess an extremely high resistance to inorganic environments. It is not attacked by aqueous solution of inorganic salts not by most mineral acids and bases, even when in concentrated form, though it is liable to be attacked by oxidising agents e.g. 100% fuming Nitric acid and Sulphuric acid or the halogens.


PROPERTIES OF POLYPROPYLENE EXTRUDED RODS:
PROPERTIES
ASTM
POLYPROPYLENE
Specific Gravity
D769
0.902 - 0.910
P.S.I. Tensile Strength
D638
4300 - 5500
% Elongation
D638
200.0 - 700.0
P.S.I. Comprehensive Strength
D695
5500 - 8000
Impact strength (½” x ½” notched)
D256
0.5 - 2.280 (1/8" x ½” bar)
Hardness Rockwell
D785
80 -110
105 P.S.I. 730 F Flexural Modules
D790
1.7 - 2.5
Coefficient of friction
-
0.3
-104 cal sec cm3 C cm Thermal conductivity
D177
2.8
Thermal expansion 105per 0C
D696
5.8 - 10.2
Resistance to heat0C (Continuous)
-
1100C
Ω - cm (230C50%) Volume resistivity
D257
1016
1/8 in thickness volts mil Dielectric strength
D149
500-650
1 KHz Dielectric constant
D150
2.2 - 2.6
1 KHz Dissipation (power) factor
D150
0.0005
0.0018
24/j3.2 mm % water absorption 24hr. 3.2 thickness, %
D570
0.01 - 0.03
in mm Burning rate
D635
0.75 - 0.82
Effect of weak acids
D534
None
Effect of strong acids
D543
Attacked slowly by oxidizing acids
Effect of weak alkalies
D543
None
Effect of Strong Alkalies
D543
Resistant
Effect of organic solvents
D543
Resistant below 800 C

Polyacetal is used in many static and dynamic industrial applications replacing materials like; steel, brass, bronze, copper and aluminium. Polyacetal have improved part life because of; better wear, more chemical & corrosion resistance.These materials reduce factory noise and will reduce or eliminate the need for lubricants

Railways :Pedestal Liner, Bush, pinion, wear pad.

Paper mills :Dryers Gears, Liner, Bush, Pulleys, Rollers.

Sugar Mills :Mill bush, liner, Wear plates, pulley, wear pads.

Cement Plants :Ropeway pulley, Uncoupling wheel, bush.

Textile Ind. :Bevel Gears, Bearings, Bushes.

Tyre Ind.:Guides, Bush, Gear, Bead Separator.

Steel Plants :Slipper pads, Bearings, Gear, Insert.

Chemical Plants :Wear pads, Scrapper.

Automobiles :Wear pads, Rings, Brush, Washers.

Bottling Plants :Star wheel, Guides, Sprockets.

  • Excellent abrasion resistance.
  • High Impact strength.
  • Low Co-efficient of friction.
  • Water Repellant.
  • Lighter than metal.
  • Corrosion Resistance to most acids & chemicals.
  • Energy Savings.
  • Resistance to stress, cracking & UV rays.
  • Has smooth & hard surface.
  • Excellent di-Electric Strength.
  • Easily Machinable.
  • Does not require bearings seals.