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Hobbyparts.com.au is selling off all hobby specific items at extremely reduced pricing. Please browse the website for special pricing on all items. Small Parts and Bearings will be taking over any non deleted ranges.


Pp - Materials - Technical
Hobby and Engineering Supplies

Polypropylene

HES 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 Hobby and Engineering Supplies Polypropylene Online Catalogue pages.


For a huge range of bearings online please visit the Bearing Shop Online Website.

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

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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Hobby and Engineering Supplies offers 2322 products in 238 categories including spare parts for remote control cars, assortment kits, kites, styrene, depron, ceramic and ceramic hybrid bearings, bearings, tools, belts 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.

Using the links throughout this site you will find extensive information including catalogues, technical data, and other product specific information. We sell our products worldwide through our online store and our overseas freight rates are competitive for fully traceable courier delivery.

Hobby and Engineering Supplies is part of MBA Group offering a select range from the MBA Group catalogue.

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