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Polypropylene
MBA 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 online at H.E. Supplies.
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Site Summary:
H.E. Supplies (Hobby Engineering Supplies) offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, kites, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 186 Wecker Road Mansfield, Queensland, Australia, but we also sell by phone, fax, online and mail order. We offer all of our hobby parts through our online store and some of the more popular MBA items. If you would like to purchase other MBA items online, Small Parts and Bearings offer the full range in their online catalogue.Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.
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