Polyester Brushes

Polyester filament is suitable for use in brushes in some environments and applications where neither polypropylene nor nylon make a good fit. Polyester is less stiff than polypropylene and comparable to Nylon in dry stiffness modulus, but superior to Nylon in wet stiffness due to its lower water absorption rate. Like Nylon, Polyester offers a higher softening and melting point than Polypropylene, and superior memory or bend-recovery.

Characteristics Polyester Polypropylene 6.6 Nylon 6.12 Nylon
Stiffness Modulus Dry 450 745 512 450
Stiffness Modulus Wet 447 700 160 400
Water Absorption % 0.33% 0.03% 9% 3%
Bend Recovery % 90% 75% 90% 90%
Softening Point (°F) 250° 240° 250° 250°
Melting Point (°F) 482° 330° 495° 410°


Polyester is superior to nylons in moderate strengths of acids. In certain chemicals, Nylon 6.12 offers superior resistance, including: acetone, benzene, ethyl acetate, hydrocarbons, methyl ketones, potassium hydroxide, sodium hydroxide, and toluene. Application testing may be recommended, and a detailed chemical compatibility analysis can be performed upon request.

Most varieties of brushes can be filled with Polyester materials, including wheel brushes, cup brushes, end brushes, cylinder brushes and strip brushes.

The following sizes and formats of Polyester are normally available in stock, but other sizes can be ordered to suit the application:

Format Color Medium Stiff
Crimped Black and Natural 0.014″ 0.036″