Polyester Physical & Chemical Properties

(Most Versatile Fiber)
Composition
Combination of Terephthalic Acid or Dimethyl terephthalate and Ethylene Glycol

Physical Properties
Microscopic Appearance
– Smooth, even, rod like, different cross-sectional shapes

Length
– Filament and staple

Color
– White

Luster
– Bright or dull

Strength
– Good to excellent

Elasticity
– Fair to good
– Greater than cotton or rayon

Resilience
-Excellent _

Moisture Absorption
– Less than 1%

Heat
– Softening or sticking temperature is above 400′ F (thermoplastic)

Flammability
– Bum slowly

Electrical Conductivity
– Accumulates static changes

Specific Gravity
– Typically 1.38