Fiber Cohesion and Unevenness

Different fibers have unique shapes and surface features, like dog-bone, square with voids, triangular, trilobal, lobular, circular, polygonal, oval, and flat with convolutions.

The acrylic and spandex fibers have a dog-bone shape.

Modified nylon and polyester fibers have a square shape with voids.

Silk fibers are triangular with rounded edges.

Modified nylon and polyester fibers can also have a trilobal shape.

Acetate fibers are lobular, and have lengthwise striations (lines).

Nylon, polyester, and lyocell fibers are circular and uniform in diameter.

Flax fibers are polygonal with a lumen (central channel).

Wool fibers are oval to round, with overlapping scales.

Cotton fibers are flat, oval-shaped, and have convolutions (folds).

Rayon fibers are circular with serrated edges (jagged) and lengthwise striations.

The ability of a fiber, yarn, or fabric to withstand surface wear, rubbing, and chafing.

A method used to test abrasion resistance on items like shoelaces and ropes.

A method used to test abrasion resistance on items like upholstery and carpets.