General
-
Hemp is one of the
highest yielding and least intensive crops to cultivate. It is highly
self compatible so that there is no need for crop rotation, but is
also a sound crop rotation. It oppresses weeds well and is so fast
growing that it does not require any kind of herbicide treatment. Hemp
is also used in breeding nurseries for preventing out crossing of
other crops because of its tall, fast growing stature, thus having
good properties as an isolation crop.
-
Hemp is cut when the
male plants are in full flower and shedding pollen. The subsequent
retting and scutching processes are similar to those for linseed and
flax. Fibre quality is reported as high: 4-20% lignin in comparison
with tree wood fibres at over 30% lignin. Lignin content is
significant because it is positively correlated with paper yellowing;
a clearly undesirable characteristic for paper with long anticipated
life.
Process
- “Biocomposites”
of non woven hemp matting and polypropylene or epoxy are pressed into
parts
such as door panels and luggage racks, replacing heavier and less safe
fiberglass composites.
- The low impact
of the farming and processing of hemp stalks and the high strength,
length and yield of the bast fibers make hemp, a traditional source of
high-strength specialty paper.
Market
-
A share of 70 - 80% of the
hemp fiber market, this traditional application still represents the
by far most important product line. In absolute terms, demand has been
largely constant, except for yearly fluctuation. Its relative share
has decreased noticeably .
-
Significant technical
progress and/or the development of new fields of application, little
economic growth of this sector is to be expected. Only a small portion
of hemp fibres used for pulping is traded in the open market, the
majority enters process chains, integrated from raw material to end
product. France continues to be the most important country for the use
of hemp fibres in the specialty pulp sector.
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Cultivation Techniques,
Process, Market, Consultancy, Report, Benefits, Product