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Pp - Materials - Technical

Polypropylene

BSO Products made from this material
Balls

A thermoplastic with lower impact strength but better tensile strength and working temperature than LDPE or HDPE (low and high density polyethylene). Polypropylene is lighter than water, resists many acids and alkalis and has very low moisture absorption.

Disadvantages of polypropylene are high thermal expansion, high creep, poor UV resistance and accelerated oxidative degradation by contact with certain materials.

Properties of Polypropylene

Physical Properties
PROPERTY UNIT VALUE
Density g/cm3 0.905
Surface Hardness Rockwell R 80-110
Tensile Strength MPa 34
Flexural Modulus GPa 1.39
Notched Izod kJ/m 0.02 to 0.1
Coefficient of friction   0.1 to 0.3
Elongation at Break % 150-300
Max Operating Temp. oC 90-100
Water Absorption % 0.03
Flammability UL94 HB
Volume Resistivity Ohmcm 1016-1018
Dielectric Strength MV/m 30-40
Dissipation Factor @ 1 MHz 0.0003 - 0.0005
Dielectric Constant @ 1 MHz 2.2-2.6
Heat Deflection Temp. @ 0.45 MPa oC 100-105
Heat Deflection Temp. @ 1.80 MPa oC 60-65

Chemical Resistance
Chemical Resistance
Acids (Concentrated) Fair-Good
Acids (Dilute) Fair-Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair
Greases and Oils Fair-Good
Halogenated Hydrocarbon Poor-Good
Halogens Poor
Ketones Good

Note! Property values are typical and should be used only as a guide to selection of materials and not as purchase specifications.

You can purchase polypropylene items online in the Bearing Shop Online Polypropylene Online Catalogue pages.


The Small Parts and Bearings has a much larger range of engineering supplies.

Hobby and Engineering Supplies lists a smaller range of products and only the most popular items in each range. They also list many additional hobby specific categories.

For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.



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Bearing Shop Online offers 25069 products in 533 categories including ball bearings, roller bearings, thrust bearings, ceramic and ceramic hybrid bearings, stainless steel bearings, miniature bearings, linear bearings, shafting, oil seals and adhesives - see the full listing in the Online Catalogue. We have excellent Freight Rates within Australia and worldwide. We offer a choice of delivery with a signature required, or cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.

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