History of hemp fiber | Properties of hemp | Cultivation and processing of hemp

Hemp

Hemp is a variety of Cannabis sativa plant species that are grown specifically for the industrial use of its products. It is one of the fastest-growing plants and it had been one of the primary plants spun into usable fibers 50,000 years ago. It can be modified into various commercial items including paper, textiles, clothing, biodegradable plastics, paints, insulation, biofuels, food, and animal feed.

Hemp

Hemp features a lower concentration of THC and a better concentration of cannabidiol (CBD), which reduces or eliminates its psychological effects. Some governments control the concentration of THC and only allow hemp that is bred with a particularly low THC content.

History of hemp fiber

Hemp is probably one of the earliest trees to be cultivated for fiber production. An archaeological site in the Oki Islands near Japan has had cannabis achenes from about 8000 BC, probably indicating the use of the plant. Archaeologically, the use of hemp dates back to the Neolithic period in China, and hemp fiber has been found in Yang Shao culture pottery since the 5th millennium BC. Later the Chinese used hemp to make early forms of clothing, shoes, rope, and paper. The classical Greek historian Herodotus (480 BC) said that the inhabitants of Scythia often breathed in the smoke of hemp seeds for breathing and their own pleasurable entertainment.

Hemp fiber

Hemp has been born for millennia for Asian and Middle Eastern fibers. Commercial production of hemp in the West began in the eighteenth century but was grown in the East of England in the sixteenth century. Due to the colonial and naval expansion of the age, economies needed large quantities of hemp for ropes and oakum. In the early 1940s, world production of hemp fiber ranged from 250,000 to 350,000 metric tons, with Russia being the largest producer.

Hemp fiber-producing countries

The world's leading producer of hemp is China, they are producing more than 70% of the world's output. France is in second place with around a quarter of the world's production. Small production occurs in Europe, Chile, and therefore the remainder of North Korea. Other countries that are producing hemp industrially are including Australia, Austria, Canada, Chile, China, India, Italy, Japan, Denmark, Egypt, Finland, Spain, Sweden, Switzerland, Germany, Greece, Hungary, Korea, Netherlands, New Zealand, Poland, Portugal, Romania, Russia, Slovenia, Thailand, Turkey, UK, and Ukraine.

Properties of hemp

1. Hemp is bast or plant fiber.

2. It is three-time stronger than cotton

3. Its fiber color is yellow to brown

4. Its elastic recovery is very less.

5. Moisture regain is 12%.

6. It has excellent heat resistance.

7. Its lustrous is very good.

8. it’s attacked by hot dilute acid or cold concentrated acid.

9. It's good resistance to alkali.

10. Its dye affinity is very poor.

11. The hand feel is not good.

12. The organic solvent doesn’t affect hemp fiber.

13. It has good abrasion resistance and durable fiber.

Cultivation and processing of hemp

In the southern hemisphere, hemp is usually planted between September and November, and between March and May in the northern hemisphere. Its maturity time is around three to four months. Selective breeding millennia results from the spread of species that exhibit different characteristics; Suitable for specific environments/latitudes, closely associated with long, slender plants with long fibers, making different combinations of different ratios and terpenoids and cannabinoids, fiber quality, oil/seed yield, etc. as a result.

Hurd and bast fiber Separation is known as decortication. Usually, before the stalks of the shell are first watered before being crushed from the inner base by hand, this process is known as scutching. With the development of mechanical technology, the fiber was separated from the original by crushing the rollers and brush rollers, or by hammer-milling, in which a mechanical hammer process was applied to the hemp as opposed to a screen to prevent dust from falling through small enclosure fibers and screens. Hit by. After the marijuana tax law came into force in 1938, the technology to separate fibers from the original remained "frozen in time." Recently, new high-speed kinematic descriptions have emerged, capable of separating hemp into three strands; bast, hurd, and green microfiber.

Uses of hemp

1. Hemp is mainly used as a textile fiber.

2. Its seeds are used as food for animals and birds.

3. Its seeds are an entire protein and a source of iron.

4. Its oil is used as oil-based paint, moisturizing cream, cooking, and plastic making.

5. Its fiber is used with other fibers for making blended textiles and furnishing.

6. Its fiber is used as rope, canvas, fabric, etc., and other products.

7. The hemp used with lime makes insulating materials.

8. Its pulp is used in the paper industry for paper making.

9. It is used in making jewelry products like a bracelet, necklaces, anklets, and other ornaments.

10. It can be used as a mop crop for purifying wastewater.

Reactions

Post a Comment

0 Comments