Polypropylene Balls

Polypropylene Balls provide low density, high chemical resistance, and good fatigue durability, making them valuable for fluid handling, mechanical, and filtration applications. Their non-toxic, corrosion-resistant nature allows use in medical devices, chemical processing systems, and water treatment equipment. Industries employ PP balls for check valves, lightweight flow control components, and media separation systems. Specific uses include floating ball valves in corrosive liquids, rolling elements in chemical-resistant bearings, and agitation media in cleaning systems. In research, they are utilized to study wear resistance in polymeric spheres, buoyancy effects in engineered fluids, and long-term stability in harsh chemical environments. The combination of mechanical resilience, low weight, and inertness ensures dependable function in both industrial and laboratory contexts.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Ball/Sphere

Diameter	Standard	±5%
Diameter	Precision	See Item

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good-Fair
Acids - dilute	Good-Fair
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Fair
Greases and Oils	Good-Fair
Halogenated Hydrocarbons	Good-Poor
Halogens	Poor
Ketones	Good

Mechanical Properties

Element	Value
Coefficient of friction	0.1-0.3
Hardness - Rockwell	R80-100
Elongation at break( % )	150-300, for biax film >50
Tensile modulus( GPa )	0.9-1.5, for biax film 2.2-4.2
Izod impact strength( J m⁻¹ )	20-100
Abrasive resistance - ASTM D1044( mg/1000 cycles )	13-16
Tensile strength( MPa )	25-40, for biax film 130-300,

Electrical Properties

Element	Value
Dielectric constant @1MHz	2.2-2.6
Dissipation factor @ 1MHz	0.0003-0.0005
Dielectric strength( kV mm⁻¹ )	30-40
Surface resistivity( Ohm/sq )	10¹³
Volume resistivity( Ohmcm )	10¹⁶-10¹⁸

Physical Properties

Element	Value
Flammability	HB
Radiation resistance	Fair
Refractive index	1.49
Resistance to Ultra-violet	Poor
Limiting oxygen index( % )	18
Water absorption - equilibrium( % )	0.03
Density( gcm⁻³ )	0.9

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	100-105
Heat-deflection temperature - 1.8MPa( C )	60-65
Lower working temperature( C )	50
Upper working temperature( C )	90-120
Specific heat( J K⁻¹ kg⁻¹ )	1700-1900
Thermal conductivity( W m⁻¹ K⁻¹ )	0.1-0.22@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	100-180