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MAJOR USES
OF INDUSTRIAL HEMP:
The three primary components of industrial
hemp, seeds, fiber, and hurds, and have a multitude of beneficial
industrial uses (historical, current, and potential), including:
SEEDS - the seeds are a highly nutritious food for both
humans and animals, and yield hempseed oil for nutrition, soaps,
cosmetics, paints, varnishes, etc.
· Food: Hemp oil is
mostly valued for its high content of polyunsaturated fatty acids
(PUFAs). At 80%, the hempseed oil contains the highest concentration
of total PUFAs in the plant kingdom, the majority of which are the
two essential fatty acids (EFA) linoleic acid (omega-6) and
alpha-linolenic acid (omega-3). Its balanced EFA ratio, which
closely matches human nutritional requirements, makes hemp oil a
suitable ingredient in a variety of food, supplement and personal
care products. Added to the value of hemp oil is the presence of a
rare fatty acid, gamma-linolenic acid (GLA), which is used to treat
ailments such as neurodermatitis, arthritis and premenstrual
syndrome.
· Chemicals: Like flax seed oil (also called
linseed oil) or cottonseed oil, hempseed oil can be processed into a
number of valuable products such as biodiesel, soaps, cosmetics,
paints varnishes, etc.
FIBER - the durable natural
fiber from the stalks can be used for textiles, clothing, canvas,
rope, cordage, for archival grade paper, & composite fibers
replacing heavier toxic fibers (e.g. fiberglass), and building
materials made with recycled plastic and fiber.
· Textiles, Rope &
Cordage: The strength, absorbency and comfort of hemp fiber is
unmatched by any other natural fiber. Historically, hemp rope
and canvas was extensively used on large sailing ships due to its
strength, resistance to salt water rot and UV resistance. The
original "Levis" brand jeans earned their reputation for strength
and durability while made of hemp canvas.
Nowadays hemp
textiles are increasingly viewed as an environmentally sound
alternative to cotton and dominate the alternative natural fiber
market in clothing and fashion wear. Due to its porosity and
absorbency, hemp fabrics take dyeing very well, and are compatible
with natural mineral and plant based dyes. Currently,
everything from diapers to bed-sheets are available made of hemp and
hemp blend fabrics. Major manufacturers such as Nike, Two-Star Dog,
Indigenous Designs, Artisan Gear and others enjoy success with their
various hemp textile products.
· Composite Fibers: Natural
fiber composites are now emerging as a realistic alternative to
wood-filled and glass-reinforced composites, especially in
automobiles. The can deliver the same performance at lower weights,
or be 25-30% stronger at the same weight. Moreover, they exhibit a
favorable non-brittle fracture on impact, another important
requirement in the passenger compartment.
The aerospace and
aviation industries are also attracted to natural fibers due to the
reduced toxicity of synthetic substances when they burn. It has been
claimed that many people have died in what would have been
survivable crashes, except for the fumes inhaled from toxic
substances burning.
HURDS - from the woody core of the
stalks, and the bulk of that stalk, can be used for paper, animal
bedding, oil absorbent, soil amendment, chemicals, plastics, &
fuels (ethanol, methane, co-firing with coal), etc.
·
Paper: During the processing of hemp, a large quantity of waste
material is produced. It was recognized rather early that this
material could be used as a feedstock for papermaking. In 1916 the
USDA published a report entitled "Hemp Hurds as a Papermaking
Material" in which the authors used chemical pulping methods to
reduce the material to fibers. After subsequent bleaching, the
material was formed into paper. The resulting paper was judged
to be of a sufficient quality to meet the specifications of the US
Government Printing Office. In fact, the strength and fold endurance
exceeded a typical wood-based material produced at that time. The
fiber yield from the hurds ranged between 35 and 44%, which, when
corrected for the weight of dirt, corresponds to 38 to 47% yield. A
chemical analysis of the hurds suggests they are 55% cellulose and
25% lignin, similar to many hardwoods. With modern process
optimization, it is likely that the fiber yield would be nearly
50%.
The value of the bast fibers as a component in paper
pulp is widely acknowledged. An analysis of the bast fibers shows
that they are composed of 70% cellulose and 8% lignin. Given that
this material is chemically quite different than the hurds, it
likely would have to be processed separately, but would likely have
a 70% yield to fiber. If one does a weighted average of 50% yield
for the hurds and 70% for the bast fibers, one obtains a value of
55% fiber yield from retted hemp stalks.
· Plastics: Hemp
hurds also serve as a renewable source of raw material for the
production of plastics, and are much cleaner and more
environmentally attractive than petroleum.
· Fuels: Use
of the hemp hurds as a biomass for fuel production is attractive for
a number of reasons:
Biomass-produced fuels, animal feeds and
industrial chemicals are economically competitive, for example: (1.)
A mixed alcohol fuel would sell for 70 cents a gallon today compared
to 80-90 cents a gallon for MTBE and $1.10 to $1.20 for ethanol.
(2.) Biomass-derived ketones such as acetone can sell for 65 cents a
gallon rather than the current market price of $2 a gallon for
ketones from conventional petrochemical technology. (3.) Carboxylic
acids from biomass technology can sell for 10 cents a pound compared
to 20 cents a pound for the conventionally produced version.
Unlike ethanol mixtures, mixed alcohol fuels ship compatibly
with gasoline in pipelines.
Chemicals produced from biomass
are all oxygenates, which are difficult to produce from oxygen-free
petroleum. Introducing oxygen into petroleum increases risk of
explosion, compared to the inherent safety of biomass
oxygenates.
Mixed alcohol fuels can be added directly
to motor fuel. They're an alternative oxygenate for making
clean-burning fuels and especially attractive in light of the recent
California ban on methyl tertiary butyl ether (MTBE ) that has
contaminated ground- and drinking water.
Biomass-derived
fuels do not contribute to global warming because the carbon dioxide
cycles, the CO2 released to the atmosphere during biomass
combustion, is offset by the CO2 taken from the atmosphere (through
photosynthesis) by the plants used to create the biomass.
ADDITIONAL INFORMATION NOTE: Above is only a brief
summary of the beneficial uses and attributes of industrial hemp.
More data is readily available by typing "industrial hemp" into any
Internet search engine, and following the links to a multitude of
sites. We particularly recommend these:
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