Chapter 11
Elastomeric Fibers:
•
A natural or synthetic polymer which at
room temperature can be stretched repeatedly
to at least twice its original length
and which after removal of the tensile load will
immediately and forcibly return
to approximately its original length.
•
*rubber – natural, original elastomeric fiber
•
*spandex – first commercially successful synthetic eleatomeric fiber
•
Lycra *Dupont’s trademark name for spandex
•
anidex
- no longer produced
•
elastoester – made in Japan
•
elasterell-P
•
T400® - Invista *#41*
•
Polyester subclass
•
lastol
•
Dow XLA™
*#40*
•
Olefin subclass
Spandex:
•
1959 in U.S. - Lycra® spandex
•
A manufactured fiber in which the fiber-forming substance is a long-chain synthetic
polymer comprised of at least 85% of a
segmented polyurethane
•
elastane
is the term of spandex globally instead of spandex
Chemical composition of spandex:
•
block copolymer
•
segmented polyurethane
•
rigid aromatic segments
•
H bonded crystalline areas
•
polyester segments
•
amorphous areas
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•
stretch
•
crosslinks between chains
Manufacturing Spandex:
DuPont
•
Lycra® spandex
–
dryspun
–
tacky fibers fuse in bundles (add tenacity)
RadiciSpandex
•
Glospan® spandex
–
reaction spinning
•
short chain→long chain
–
fibers adhere to form bundles (adds tenacity)
Asahi Kasei Gr
o
up
•
Roica®spandex

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- Fall '10
- HRINCHEVICH
- Polymer, Rubber, Natural rubber, Spandex, rubber bands*
-
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