- In melt spinning, the fiber-forming substance is melted for
extrusion through the spinneret and then directly solidified by cooling.
Nylon, olefin, polyester, saran and sulfar are produced in this manner.
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Melt spun fibers can be extruded from the spinneret in different
cross-sectional shapes (round, trilobal, pentagonal, octagonal, and
others). Trilobal-shaped fibers reflect more light and give an
attractive sparkle to textiles.
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- Pentagonal-shaped and hollow
fibers, when used in carpet, show less soil and dirt. Octagonal-shaped
fibers offer glitter-free effects. Hollow fibers trap air, creating
insulation and provide loft characteristics equal to, or better than,
down.