a plastic polymer of propylene, (C3H5)n, used chiefly for molded parts, electrical insulation, packaging, and fibers for wearing apparel.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use polypropylene in a sentence
Because they are made of polypropylene, most paints will chip off.
To boost viability, Coates and colleagues created a highly potent compatibilizer for polyethylene and polypropylene.Chemists are reimagining recycling to keep plastics out of landfills | Maria Temming | January 27, 2021 | Science News
They suggest wearing a cloth mask with two tightly woven layers and a filter made out of a type of plastic called polypropylene in between.When are two masks better than one for preventing COVID-19? | Tara Santora | January 20, 2021 | Popular-Science
It also comes with three disposable filters made from non-woven polypropylene—the same stuff that’s in some reusable bags—that serve as a third layer of protection.
Existing worldwide supplies of the melt-blown polypropylene used in the most coveted PPE item in hospitals—the N95 respirators capable of filtering out the virus—are spoken for through at least the first few months of 2021.
British Dictionary definitions for polypropylene
any of various tough flexible synthetic thermoplastic materials made by polymerizing propylene and used for making moulded articles, laminates, bottles, pipes, and fibres for ropes, bristles, upholstery, and carpets: Systematic name: polypropene
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for polypropylene
Any of various thermoplastic resins that are polymers consisting of repeated branched units derived from propane and having the formula CH2CH(CH3), usually with the methane groups (CH3) all on one side of the chain. Polypropylenes are similar to polyethylenes but are harder and tougher and are used to make molded articles and fibers.
A fabric of fibers made from any of these resins.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.