WILL
CORN REVOLUTIONIZE THE FIBER INDUSTRY?
By
Nancy Kelley, President Textile
Fabric Consultants, Inc.
Imagine instead of eating corn, you are now wearing
corn
and not as a Halloween costume, but as your favorite career dresswear.
This is not a corny joke, but NatureWorks PLA, a fiber entirely derived
from corn, with the final product a natural plastic. Nature Works PLA is
made from the dextrose extracted from corn.
The dextrose is then fermented to produce lactic acid.
The water is then removed and converted to fiber form.
Corn is being used as the dextrose source because of its abundance and
low cost.
The fiber is being produced as a joint venture (Cargill
Dow Polymers LLC) between Cargill, Inc. and The Dow Chemical Company, two of the
biggest names in agriculture and chemicals.
Cargill markets, processes and distributes agricultural products on an
international scale. Dow is a global manufacturer of chemicals, plastics and
agricultural products. Cargill supplies the lactic acid and Dow brings the
large-scale polymer manufacturing economics to the joint venture. An application for generic fiber classification has been
submitted to the Federal Trade Commission.
Fabrics made with NatureWorks PLA offer
consumers a unique combination of options.
These properties have attracted considerable attention. The fabrics exhibit the comfort and hand of natural fibers
such as cotton, silk and wool while having the performance, cost, and easy care
characteristics of synthetics.
PLA fibers demonstrate excellent resiliency, outstanding crimp retention
and improved wicking compared with natural fibers.
Fabrics produced from PLA are being utilized for their silky feel, drape,
durability and moisture properties.
PLA is not a new polymer. But the recent advances in the fermentation of glucose (which
is obtained from the corn) had led to a dramatic reduction in the manufacturing
cost of the lactic acid used to make the polymers. For the first time these fibers can be made entirely from a
renewable resource (corn) while at the same time compete in the marketplace in
relation to cost and performance.
People have know for years that plants hold
the potential to meet a number of our society needs, says Pat Gruber, Vice
President of Technology. What we
have done is take a basic plant function that has been going on for eons and
learned how to tap into it to make two of the worlds most used items,
plastics and fibers. And, we are
doing so in an environmentally and socially responsible manner.
Fiber producers, yarn spinners, manufacturers
have already been working with this fiber.
NatureWorks PLA can be used in a wide range of woven and non-woven
applications, including: clothing, carpets, diapers, mattresses, upholstery,
interior and outdoor furnishings, filtration and geotextile applications.
Industrial applications are attributed to its UV resistance, reduced
flammability, low smoke generation, toxicity and soil resistance and stain
removal. Several U.S. mills are
spinning yarn made from NatureWorks PLA including Unifi, Fiber Innovations
Technology and Parkdale Mills. At the 1998 Winter Olympic Games in Japan,
Cargill sponsored a fashion show of clothes from the earth which included
fabrics made with NatureWorks PLA.
Most important among its many advantages is
that NatureWorks PLA is a renewable resource.
Nature Works PLA is being touted as an eco-efficient and environmentally
friendly product. The NatureWorks
PLA process uses 30-50% less fossil fuel than usually required to produce
conventional fiber. PLA products
can be disposed of by composting. According
to William Stavropoulos, president and CEO of Dow Chemical Company, Whats
exciting about this technology is its breadth of applications and the fact that
it comes from annually renewable resources.
NatureWorks offers the opportunity to truly develop sustainable products
because we are using raw materials that can be regenerated year after year and
it is cost competitive and environmentally responsible.
Cargill Dow Polymers currently operates a plant near
Minneapolis, Minnesota. The company
is investing $8 million to double capacity this year to meet immediate market
development needs. Cargill and Dow
have invested more than $300 million in a new manufacturing facility in Blair,
Nebraska, which is scheduled to come on stream at the end of 2001.
This new plant will serve global demand until capacity is added in Europe
and Asia.
Future plans call for extracting dextrose from other
plant sources such as sugar beets, wheat, rice and other products containing
cellulose. Worldwide production is
an implication of this renewable resource
a boon for farmers here and around
the globe. A major new market for
producers of agriculture crops is created, securing an employment base for rural
workers.
To think that what is grown in a field can
now be converted into plastic is really quite amazing, says Jim Stoppert,
President and CEO of Cargill Dow Polymers.
The Nature Works process allows us to tap into the natural raw
materials contained within plants and creates plastics with performance that is
equal to or better than those made from non-renewable sources.
Sources:
http://textileworld.com
http://cdpoly.com
Copyright
Nancy Kelley
Courtesy of Textile Fabric Consultants
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