Fiber crop

Last updated

Fiber crops are field crops grown for their fibers, which are traditionally used to make paper, cloth, or rope. [1]

Contents

Fiber crops are characterized by having a large concentration of cellulose, which is what gives them their strength. The fibers may be chemically modified, like in viscose (used to make rayon and cellophane). In recent years, materials scientists have begun exploring further use of these fibers in composite materials. Due to cellulose being the main factor of a plant fiber's strength, this is what scientists are looking to manipulate to create different types of fibers.

Fiber crops are generally harvestable after a single growing season, as distinct from trees, which are typically grown for many years before being harvested for such materials as wood pulp fiber or lacebark. In specific circumstances, fiber crops can be superior to wood pulp fiber in terms of technical performance, environmental impact or cost. [2]

There are a number of issues regarding the use of fiber crops to make pulp. [3] One of these is seasonal availability. While trees can be harvested continuously, many field crops are harvested once during the year and must be stored such that the crop doesn't rot over a period of many months. Considering that many pulp mills require several thousand tonnes of fiber source per day, storage of the fiber source can be a major issue.

Botanically, the fibers harvested from many of these plants are bast fibers; the fibers come from the phloem tissue of the plant. The other fiber crop fibers are hard/leaf fibers (come from the entirety of plant vascular bundles) and surface fibers (come from plant epidermal tissue). [1]

Fiber sources

To have a source of fiber to utilize in production, the fiber first must be extracted from the plant. This is done in different ways depending on the fiber classification. Bast fibers are harvested through retting which is where microbes are utilized to remove soft tissues from the plant and only the useful fibrous material remains. Hard fibers are harvested mainly through decortication which is where the non-fibrous tissues are removed by hand or machine. Lastly, surface fibers are harvested through ginning which is where a machine removes the fibers from other plant material.[ citation needed ]

Paper

Before the industrialisation of the paper production the most common fiber source was recycled fibers from used textiles, called rags. The rags were from ramie, hemp, linen and cotton. [4] A process for removing printing inks from recycled paper was invented by German jurist Justus Claproth in 1774. [4] Today this method is called deinking. It was not until the introduction of wood pulp in 1843 that paper production was not dependent on recycled materials from ragpickers. [4]

Fiber crops

Related Research Articles

<span class="mw-page-title-main">Flax</span> Flowering plant in the family Linaceae

Flax, also known as common flax or linseed, is a flowering plant, Linum usitatissimum, in the family Linaceae. It is cultivated as a food and fiber crop in regions of the world with temperate climates. Textiles made from flax are known in English as linen and are traditionally used for bed sheets, underclothes, and table linen. Its oil is known as linseed oil. In addition to referring to the plant, the word "flax" may refer to the unspun fibers of the flax plant. The plant species is known only as a cultivated plant and appears to have been domesticated just once from the wild species Linum bienne, called pale flax. The plants called "flax" in New Zealand are, by contrast, members of the genus Phormium.

<span class="mw-page-title-main">Linen</span> Textile made from spun flax fibre

Linen is a textile made from the fibers of the flax plant.

<span class="mw-page-title-main">Sisal</span> Species of flowering plant in the family Asparagaceae

Sisal is a species of flowering plant native to southern Mexico, but widely cultivated and naturalized in many other countries. It yields a stiff fibre used in making rope and various other products. The sisal fibre is traditionally used for rope and twine, and has many other uses, including paper, cloth, footwear, hats, bags, carpets, geotextiles, and dartboards. It is also used as fibre reinforcements for composite fibreglass, rubber, and concrete products. It can also be fermented and distilled to make mezcal.

<span class="mw-page-title-main">Pulp (paper)</span> Fibrous material used notably in papermaking

Pulp is a fibrous lignocellulosic material prepared by chemically, semi-chemically or mechanically producing cellulosic fibers from wood, fiber crops, waste paper, or rags. Mixed with water and other chemicals or plant-based additives, pulp is the major raw material used in papermaking and the industrial production of other paper products.

<span class="mw-page-title-main">Jute</span> Bast fiber from the genus Corchorus

Jute is a long, rough, shiny bast fiber that can be spun into coarse, strong threads. It is produced from flowering plants in the genus Corchorus, of the mallow family Malvaceae. The primary source of the fiber is Corchorus olitorius, but such fiber is considered inferior to that derived from Corchorus capsularis.

<span class="mw-page-title-main">Kenaf</span> Species of flowering plant

Kenaf [etymology: Persian], Hibiscus cannabinus, is a plant in the family Malvaceae also called Deccan hemp and Java jute. Hibiscus cannabinus is in the genus Hibiscus and is native to Africa, though its exact origin is unknown. The name also applies to the fibre obtained from this plant. Kenaf is one of the allied fibres of jute and shows similar characteristics.

<span class="mw-page-title-main">Ramie</span> Species of plant

Ramie, Boehmeria nivea, is a flowering plant in the nettle family Urticaceae, native to eastern Asia. It is a herbaceous perennial growing to 1.0–2.5 m tall; the leaves are heart-shaped, 7–15 cm (2.8–5.9 in) long and 6–12 cm (2.4–4.7 in) broad, and white on the underside with dense, small hairs—this gives it a silvery appearance; unlike stinging nettles, the hairs do not sting. The true ramie or China grass is also called Chinese plant or white ramie.

<span class="mw-page-title-main">Hemp</span> Low-THC cannabis plant

Hemp, or industrial hemp, is a plant in the botanical class of Cannabis sativa cultivars grown specifically for industrial and consumable use. It can be used to make a wide range of products. Along with bamboo, hemp is among the fastest growing plants on Earth. It was also one of the first plants to be spun into usable fiber 50,000 years ago. It can be refined into a variety of commercial items, including paper, rope, textiles, clothing, biodegradable plastics, paint, insulation, biofuel, food, and animal feed.

<span class="mw-page-title-main">Ground tissue</span> Category of tissue in plants

The ground tissue of plants includes all tissues that are neither dermal nor vascular. It can be divided into three types based on the nature of the cell walls. This tissue system is present between the dermal tissue and forms the main bulk of the plant body.

  1. Parenchyma cells have thin primary walls and usually remain alive after they become mature. Parenchyma forms the "filler" tissue in the soft parts of plants, and is usually present in cortex, pericycle, pith, and medullary rays in primary stem and root.
  2. Collenchyma cells have thin primary walls with some areas of secondary thickening. Collenchyma provides extra mechanical and structural support, particularly in regions of new growth.
  3. Sclerenchyma cells have thick lignified secondary walls and often die when mature. Sclerenchyma provides the main structural support to the plant.
<span class="mw-page-title-main">Bast fibre</span> Fibre obtained from the phloem tissues of many plants, used for textiles, rope, and paper

Bast fibre is plant fibre collected from the phloem or bast surrounding the stem of certain dicotyledonous plants. It supports the conductive cells of the phloem and provides strength to the stem. Some of the economically important bast fibres are obtained from herbs cultivated in agriculture, as for instance flax, hemp, or ramie, but bast fibres from wild plants, as stinging nettle, and trees such as lime or linden, willow, oak, wisteria, and mulberry have also been used in the past. Bast fibres are classified as soft fibres, and are flexible. Fibres from monocotyledonous plants, called "leaf fibre", are classified as hard fibres and are stiff.

The United Nations General Assembly declared 2009 as the International Year of Natural Fibres (IYNF), as well as the International Year of Astronomy.

<span class="mw-page-title-main">Bamboo textile</span> Textile made from various parts of the bamboo plant

Bamboo textile is any cloth, yarn or clothing made from bamboo fibres. While historically used only for structural elements, such as bustles and the ribs of corsets, in recent years different technologies have been developed that allow bamboo fibre to be used for a wide range of textile and fashion applications.

Tree-free paper, or tree-free newsprint, is described as an alternative to wood-pulp paper due to its raw material composition. It is claimed to be more eco-friendly when considering the product's entire life cycle.

Deinking is the industrial process of removing printing ink from paperfibers of recycled paper to make deinked pulp.

<span class="mw-page-title-main">Scutching</span> Process of separating and cleaning vegetable fiber before spinning

Scutching is a step in the processing of cotton or the dressing of flax or hemp in preparation for spinning. The scutching process separates the impurities from the raw material, such as the seeds from raw cotton or the straw and woody stem from flax fibers. Scutching can be done by hand or by a machine known as a scutcher. Hand scutching of flax is done with a wooden scutching knife and a small iron scraper. The end products of scutching flax are the long finer flax fibers called line, short coarser fibers called tow, and waste woody matter called shives.

Wood-free paper is paper created exclusively from chemical pulp rather than mechanical pulp. Chemical pulp is normally made from pulpwood, but is not considered wood as most of the lignin is removed and separated from the cellulose fibers during processing, whereas mechanical pulp retains most of its wood components and can therefore still be described as wood. Wood-free paper is not as susceptible to yellowing as paper containing mechanical pulp. Wood-free paper offers several environmental and economic benefits, including reduced deforestation, decreased energy consumption, and improved waste management. The term Wood-free paper can be rather misleading or confusing for someone unfamiliar with the papermaking process because paper is normally made from wood pulp derived from trees and shrubs. However, wood free paper does not mean that the paper in question is not made from wood pulp but it means that the lignin in the wood fiber has been removed by a chemical process.

<span class="mw-page-title-main">Setralit</span>

Setralit is a technical natural fiber based on plant fibers whose property profile has been modified selectively in order to meet different industrial requirements. It was first manufactured in 1989 by Jean-Léon Spehner, an Alsatian engineer, and further developed by the German company ECCO Gleittechnik GmbH. The name “Setralit“ is derived from the French company Setral S.à.r.l. which is a subsidiary company of ECCO, where Spehner was employed at that time. Setralit was officially described first in 1990.

<span class="mw-page-title-main">Leaf fiber</span> Plant fiber mainly used for producing rope

Leaf fibers or hard fibers are a type of plant fiber mainly used for cordage. They are the toughest of the plant fibers which is most likely due to their increased lignin content when compared to the other groups of plant fibers. They are typically characterized as being very tough and rigid lending them towards being used in rope production over clothing or paper like other plant fibers.

Hemp paper is paper varieties consisting exclusively or to a large extent from pulp obtained from fibers of industrial hemp. The products are mainly specialty papers such as cigarette paper, banknotes and technical filter papers. Compared to wood pulp, hemp pulp offers a four to five times longer fibre, a significantly lower lignin fraction as well as a higher tear resistance and tensile strength. Because the paper industry's processes have been optimized for wood as the feedstock, production costs currently are much higher than for paper from wood.

<i>Linum strictum</i> Species of flax

Linum strictum, commonly known as rigid flax, upright flax, and upright yellow flax, is a species of flax with a rigid stem, from whence it derives its taxonomic name, growing to a height of 10–45 cm. The plant is endemic to the Mediterranean region. It features highly in classical Hebrew and Greek literature, owing principally to its cultivation for its plant fiber, linen, but also for its edible seeds and culinary foliage.

References

  1. 1 2 Levetin, Estelle; McMahon, Karen (2012). Plants and Society. New York, NY: McGraw-Hill. p. 297. ISBN   978-0-07-352422-1.
  2. "Agripulp: pulping agricultural crops". Archived from the original on 2016-08-15. Retrieved 2007-10-03.
  3. "Nonwood Alternatives to Wood Fiber in Paper". Archived from the original on 2007-07-08. Retrieved 2007-10-03.
  4. 1 2 3 Göttsching, Lothar; Pakarinen, Heikki (2000), "1", Recycled Fiber and Deinking, Papermaking Science and Technology, vol. 7, Finland: Fapet Oy, pp. 12–14, ISBN   952-5216-07-1
  5. Li, Yu; Fu, Jiajia; Wang, Hongbo; Gao, Weidong (September 2022). "Evaluation of bamboo water-retting for fiber bundle extraction". Textile Research Journal. 92 (17–18): 3289–3298. doi:10.1177/00405175211062048. S2CID   245297960.
  6. Kovačević, Zorana; Vukušić, Sandra Bischof; Zimniewska, Malgorzata (2012). "Comparison of Spanish broom (Spartium junceum L.) and flax (Linum usitatissimum) fibre". Textile Research Journal. 82 (17): 1786–1798. doi:10.1177/0040517512447526 . Retrieved 26 January 2024.
  7. Strother, John L. "Tilia". Flora of North America. Missouri Botanical Garden & Harvard University. Retrieved 26 January 2024.