For something to float, it must have a specific gravity less than water, which is 1. Polypropylene has a 0.90 to 0.91 specific gravity, and polyethylene has a 0.94 to 0.965. These are the only two plastic balls that will float.
Nylon has a specific gravity of 1.09 to 1.14. Teflon has a specific gravity of 2.13 to 2.22.
Acrylic has a specific gravity of 1.17 to 1.20.
Title: Which of the solid plastic balls float?
Description: How to know if your plastic will float or sink.
Last Edited: 1/16/2023
The information contained in this article is for general information purposes only. The information is provided by
United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or
warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with
respect to the website or the information, products, services, or related graphics contained on the website for any purpose.
Any reliance you place on such information is therefore strictly at your own risk.
In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss
or damage, or any loss or damage whatsoever arising from loss of materials, time or profits arising out of,
or in connection with, the use of this information.