Side-By-Side Biconstituent - ANSWER-Polymer types each occupy half the fiber cross-
section. Used to produce a fiber which will develop a spiral crimp when exposed to heat
or moisture.
Cover/Core - ANSWER-One polymer forms the bulk of the fiber with the other forming
an outer cover. Used for dye effects, and to modify fabric hand.
MatrixFibril - ANSWER-One polymer forms a continuous phase with the other within it in
the form of very small fibers called fibrils. Used for specialty fabric production. A way to
produce microfibers.
Nylon - ANSWER-cross section: various
material: petroleum
melt spun
Polyester - ANSWER-cross section: various
material: petroleum
melt spun
*ethylene group
Olefin - ANSWER-cross section: various
material: petroleum
melt spun
Acrylic - ANSWER-cross section: various
material: petroleum
wet/dry spun
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