Slippery at the molecular level, it does have a relatively high coefficient of friction. Polypropylene possesses good fatigue resistance. Does not break when repeatedly bent and Polypropylene is very resistant to absorbing moisture. Polypropylene has good chemical resistance over a wide range of bases and acids. Polypropylene has good impact strength. Polypropylene is a good electrical insulator 20 x red nuts, 20 x washers, 20x bolts M4 x 40mm, Pan Head Screw, Pantone 19-1664-TPX Water Resistant, Anti-Corrosion, Chemical Resistant, Electrical Insulator, Strong. APPLICATIONS: Polypropylene is an economical material that offers a combination of outstanding physical, chemical, mechanical, thermal and electrical properties not found in any other thermoplastic.