Specialty Fabrics Review December 2019 - 38

from low-cost feedstocks can ultimately
be competitive with petroleum-based
persistent textiles-the key is achieving
large scale. We believe methane offers
the best opportunity to bridge the current
pricing gap between biopolymers and
traditional plastics."

Textivision's glossy knit jacquard
features biobased Naia™ and elastane.
Photo: Eastman Chemical Co.

BIOPOLYMERS IN
COMMERCIAL USE
PLA, or polylactic acid, was the original
melt-processable biopolymer produced
from renewable resources, such as corn
starch, which is converted to glucose and
then to lactic acid. Commercialized in the
1990s as Ingeo™ by Cargill-Dow, it was not
especially successful in apparel textiles. PLA
has been well-received for bedding and
fiberfill, and is widely used for packaging.
PTT or Triexta (poly trimethylene
terephthalate), another substitute
for polyester, is created from BioPDO™, a bio-monomer developed by
DuPont™ in Wilmington, Del. BioPDO (1,3-propanediol), branded as
Susterra®, is the result of the aerobic

Bio-based Tencel fibers are seeing strong growth in various textile markets. Photo: Lenzing AG.

38 REVIEW DECEMBER 2019

fermentation of glucose; it's reacted
with a petrochemical monomer to create
PTT. The resulting polymer, branded as
DuPont Sorona® for apparel and carpet, is
37 percent renewably sourced. (The U.S.
government requires only 25 percent for
an official bio-based label.)
The Sorona brand team is rolling out a
new brand architecture in 2020 focused on
fabrics to make it easier for apparel brands
and garment manufacturers to find the
solutions they're looking for, according
to Laurie Kronenberg, global marketing
manager for Sorona, DuPont Tate & Lyle
Bio Products Co. LLC.
Sorona polymer-based fabrics and
insulation products offer a wide variety
of performance solutions for apparel
manufacturers: wrinkle-resistant
outerwear fabrics, spandex-free stretch
fabrics and long-lasting stretch fabrics that
maintain their shape wear after wear, as
well as soft and resilient solutions from
natural fiber fabric binds to insulation
and even new faux furs.
"People buy our product based on
performance," says Kronenberg. "We are
happy to provide brands with different
ways to move towards a circular economy."
DuPont Tate & Lyle continues to
expand its production of Susterra BioPDO as well. As a building block for
bio-TPUs (thermoplastic polyurethanes),
Susterra is increasingly showing up in
plant-based footwear, apparel and gear as
it integrates into existing manufacturing
processes from traditional injection
and cast molding to newer 3D printing
processes, says Kronenberg.
A NEW SPIN ON CELLULOSICS
Wood-based cellulosic fibers such as rayon,
acetate and lyocell have been around for
years. Now repositioned and marketed as
sustainable and biodegradable options, the
branded cellulosic fibers Lenzing TENCEL™
and Eastman Naia™ are both enjoying
success in the apparel textile market.



Specialty Fabrics Review December 2019

Table of Contents for the Digital Edition of Specialty Fabrics Review December 2019

Specialty Fabrics Review December 2019 - Cover1
Specialty Fabrics Review December 2019 - Cover2
Specialty Fabrics Review December 2019 - 1
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Specialty Fabrics Review December 2019 - 3
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