Polyester Fiber, Recycled

This is a sample polyester fiber from the cloth sample-set (#63) provided by Textile Fabric Consultants, Inc. The fibers have been dyed blue but the third order interference colors are still evident. Some mechanical damage is evident on the fibers.

Transmitted Crossed Circular Polarized Light

Definition/Function:

Polyester fiber is derived from terephthalic acid. It is formed into a fiber by extruding the heated polymer through a spinneret. This results in the fiber taking the cross-section of the spinneret. Polyester fiber can be round or any other desirable extruded shape.

Significance in the Environment:

This is a common clothing fiber.

Characteristic Features:

Rayon fiber has a refractive index along its length of about 1.71 to 1.73 and perpendicular to its length of about 1.53 to 1.54. It has a birefringence of about 0.18 and a positive sign of elongation. It tends to exhibit a smooth, regular surface along its length depending on its cross-section of the fiber. Extreme shapes, such as heptalobate types, can result in an irregular appearance along the length as the fiber twists or bends.

Associated Particles:

References:

DuPont Company Techinical Bulletin X-156: IDENTIFICATION OF FIBERS IN TEXTILE MATERIALS, December 1961.

http://en.wikipedia.org/wiki/Polyester