Finite Fiber specializes in precision cut fiber polymer reinforcing materials.

Polyester Fibers

RFL treated precision cut polyester fibers deliver balanced properties
Polyester fibers characteristics are high density, tensile strength, modulus elongation at break, tear strength, abrasion resistance and moderate temperature sensitivity.


High tensile, RFL treated engineered textile fiber. Constructed mult-filament plied and twisted fiber bundles designed and treated for enhanced matrix dispersion. Polyesters are semi-crystalline materials.


High tensile Polyester is characterized by its dimensional stability at high temperatures, high breaking strengths, excellent resistance to mildew and acids, with good aging, abrasion resistance, high tensile strength, resilience and resistance to stretching, as well as, superior compressibility.

Polyester Fiber Properties

Form Precision Cut
Composition Semi-Crystalline Polymer
Standard Nominal Length* 3mm, 4mm, 8mm, Random
Specific Gravity 1.39
Ash Weight under 1%
Melting Point 263°C / 505°F
Water Absorption <1%
Color Black/Brown

* Custom sizes available.

Standard Packaging Options

Low-Melt Bags (71° C, 160°F) 6lbs. - 25 lbs.
Bulk Box (40-3/8" x 34-3/8" x 30") 400 lbs. - 500 lbs.
Bulk Box (39-1/2" x 33-1/2" x 43-1/2") 650 lbs. - 900 lbs.
Super Sack (38" x 38" x 46") 850 lbs. - 1,000 lbs.

Standard Cut Lengths

Polyester fibers standard cut lengths are 3mm, 4mm, and 8mm.
RFL treated precision cut polyester fibers have balanced properties.
RFL treated precision cut polyester fibers have balanced properties.
Polyester Data Sheet.

Polyester Fiber Safety Data Sheet
Polyester SDS

General Engineered Cut Fiber Products Information

Product Information Sheet

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