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Synthetic Brush Fibers & Filaments

Carolina Brush offers a variety of different synthetic brush fiber options for our brushes, including Nylon, Polypropylene and Polyester. Synthetic brush fibers as a whole offer a number of advantages over natural fibers, including higher durability, chemical resistance, and excellent bend recovery. Synthetic fibers also have the advantage of a high absorption rate and high wet stiffness that make synthetic fibers a good choice for wet conditions. In addition, synthetic fibers are also antimicrobial and usually more economical than natural fibers, making them a popular choice. It is because of these particular features that synthetic fiber brushes have found use in applications like wet scrubbing, dentistry, cleaning, artwork, painting and forensics.

Nylon brush fiber


With a variety of nylon types each offering their own set of qualities, Carolina Brush is sure to have the right Nylon for your specific application. We offer Type 6, 6.6 and 6.12, as well as abrasive options under the "abrasive" category on this site.
Polyester Brush Fiber


With excellent bend recovery, solvent resistance and oxidation resistance, Polyester acts as a good substitute for Nylon in certain applications.
Polypropylene brush fiber


The high quality polypropylene we use is versatile, with excellent wet stiffness, flex fatigue resistance, and chemical resistance, among other properties.
Abrasive Brush Fiber


For rugged applications requiring a more coarse touch, we offer a long wearing abrasive filament impregnated with silicone carbide particles.

Fiber Property Comparisons

Filament Melting Point (*F) Tensile Modulus (kpsi) Tensile Strength (kpsi) Flicking Action % Bend Recovery Relative Abrasion Resistance
Nylon 6 410 480 53 Excellent 97 Excellent
Nylon 6.6 495 520 48 Excellent 97 Excellent
Nylon 6.12           410 480 42 Excellent 93 Excellent
Polypropylene 320 740 53 Good 75 Fair
Polyester 430 445 31 Excellent 92 Good

Filament Set Resistance Relative Flex Fatigue Resistance Water Absorption % Max Retention of Stiffness in Water Sunlight & UV Light Resistance General Solvent Resistance
Nylon 6 Good Excellent 9 Poor Fair Excellent
Nylon 6.6 Good Excellent 9 Poor Fair Excellent
Nylon 6.12           Good Excellent 3 Good Fair Excellent
Polypropylene Fair Best <0.1 Excellent Poor Excellent
Polyester Good Good 0.5 Excellent Fair Excellent

The above compares in a general way some of the properties of the synthetic filaments we most commonly use to aid in distinguishing between them when selecting the filament best suited for a particular application.