The similarities and differences between cotton fiber and hemp fiber, the application of cotton fiber and hemp fiber, cotton fiber and hemp fiber are both near flame and burning, burning rapidly, the flame is yellow, blue smoke. The difference between the two smells of burning and the ash after burning is that the cotton burns to emit a paper smell, and the hemp burns to give off the ash smell of grass; after burning, the cotton has very little powder ash, which is black or gray, and the hemp produces a small amount of grayish white powder ash.
Hemp fiber structure performance Hemp fiber refers to a general term for fibers obtained from various hemp plants. There are many varieties of hemp fiber, including bast fiber and leaf fiber. Fiber made from various hemp plants, including the bast fibers of the annual or perennial herb dicotyledon cortex and the leaf fibers of monocots. The bast fiber crops are mainly ramie, jute, ramie, hemp (hemp), flax, apocynum and ramie. Among them, the cell walls such as ramie, flax and apocynum are not lignified, and the fibers are thick and slender and short, similar to cotton. They can be used as textile raw materials, woven into various cool fine linens and summer cloths, and can also be blended with cotton, wool, silk or chemical fiber; The cell walls of jute fiber such as jute and ramie are lignified and the fibers are short. They are only suitable for spinning ropes and sacks for packaging. Leaf fiber is thicker than bast fiber and can only be made into ropes. Hemp crops can also produce raw materials for chemicals, pharmaceuticals and paper. The hemp fiber is bonded to the tablet by the gum. The gum must be removed during the preparation to separate the fibers, which is called degumming. Ramie and linen can be separated into single fibers. The jute fiber is short and can only be separated into appropriately sized fiber bundles for spinning. This fiber bundle is called a process fiber. In the hemp fiber for textiles, colloid and other cellulose are associated with more bacteria. After scouring, the cellulose content of hemp fiber is still lower than that of cotton fiber. The cellulose content of ramie fiber and cotton are close to (more than 95%), the content of flax cellulose is slightly lower than that of ramie, and the cellulose content of jute and leaf fiber is only about 70% or less. The orientation of cellulose macromolecules in the cell wall of ramie and flax fiber is larger than that of cotton fiber, and the crystallinity is also good. Therefore, the strength of hemp fiber is higher than that of cotton fiber, up to 6.5 g/denier; the elongation is small, only cotton fiber Half, about 3.5%, is crisper than cotton fiber. The surface of ramie and flax fiber is smooth, it is easy to absorb water, and the moisture is released to the atmosphere faster; the fiber is relatively straight and not easily deformed. The Egyptians have used lining fiber for 8,000 years, and the shroud of the Egyptian mummies in the tomb is more than 900 meters long. China used ramie as a textile raw material in the Neolithic Age 4000 years ago. The ramie fabric fragments found in the unearthed relics of Qianshan Mountain in Wuxing, Zhejiang Province were relics before 2700 BC.
Both cotton fiber and hemp fiber are burning near the flame, burning rapidly, the flame is yellow, and blue smoke is emitted. The difference between the two smells of burning and the ash after burning is that the cotton burns to emit a paper smell, and the hemp burns to give off the ash smell of grass; after burning, the cotton has very little powder ash, which is black or gray, and the hemp produces a small amount of grayish white powder ash.
Hemp fiber profile Hemp fiber refers to fibers obtained from the stems, leaves and sheaths of hemp plants for textile use. China's hemp fiber is rich in resources, of which ramie production ranks first in the world.
There are many types of hemp fiber, and there are two types of fiber, fiber and leaf fiber. The stem fiber is in the phloem of the stem, so it is also called bast fiber. The bast fiber mainly includes ramie, flax, jute, ramie (also known as kenaf), hemp, ramie and the like. Among them, ramie and linen are superior in quality and are the main hemp fiber for textiles. Jute and hemp are hard and suitable for making sacks and ropes. Another type of hemp fiber obtained from leaves, such as sisal, abaca, etc., is not suitable for taking textile raw materials because of its rough texture, but it has high toughness, strong water resistance, and making fishing nets and ropes.
After the hemp stem is harvested, it is subjected to preliminary processing such as degumming, and spinning is performed by single fiber or fast fiber. The ramie fiber has a large length and can be spun in a single fiber form. In the case of flax, jute, ramie, etc., since the length of the single fiber is short and not uniform, the degummed bundle fiber is used for spinning.
The main physical and chemical properties of hemp fiber 1. Length and linear density The single fiber length of hemp fiber is: ramie length 50 ~ 120mm, flax length 17 ~ 25mm, jute length 2 ~ 4mm, ramie length 2 ~ 6mm. The single fiber linear density of hemp fiber is about 0.91 to 0.4 tex for ramie, 0.29 tex for linen, and about 10 to 28 mm μm for jute. The bundled fiber obtained by the initial processing such as flax is further combed to become a technical fiber suitable for spinning. The linear density of the process fiber is related to the variety of hemp fiber, the degree of degumming and the number of combing.
2. Stretch and elastic hemp fiber is the fiber with the strongest strength and the smallest elongation in natural fiber. The break length of ramie can reach 40-55km, while the breakage of ramie, flax and jute is 2%~4%, respectively. About %, about 3%, hemp fiber is poorly single, and the fabric of hemp fabric is easy to wrinkle.
3. Hygroscopic hemp fiber has strong moisture absorption capacity, among which jute has the highest hygroscopicity, and the moisture regain rate under general atmospheric conditions can reach about 14%. In addition, hemp fiber absorbs moisture and disperses quickly, so its fabric is worn in summer. Cool and comfortable.
4. Acid-resistant alkaline hemp fiber is more resistant to alkali than acid, and in concentrated sulfuric acid, ramie will swell and dissolve.
5. Other properties Hemp fiber has a high initial modulus, a rough handle, good sunlight resistance and electrical insulation, but the heat resistance of ramie and linen is not as good as cotton fiber.
Cotton fiber overview Cotton fiber is the main raw material of China's textile industry, and it plays an important role in textile fiber. China is one of the major cotton-producing countries in the world. At present, China's cotton production has entered the forefront of the world. China's cotton cultivation is almost all over the country. Among them, the Yellow River Basin and the Yangtze River Basin are the main ones, plus the northwest inland, the Liaohe River Basin and South China, a total of five cotton areas.
Cotton is mostly an annual plant. It is developed from the epidermal cells that grow on cotton seeds. Cotton fiber can be divided into three stages: elongation period, thickening period and transition period. There are many types of cotton, and they are currently classified according to the following two methods.
The main physical and chemical properties of cotton fiber 1. Length Cotton fiber length refers to the distance between the ends of the fiber when it is straightened, which is one of the important physical properties of cotton fiber. The length of cotton fiber is mainly determined by factors such as cotton variety, growth conditions, and initial processing. The length of the cotton fiber is closely related to the quality of the yarn and the spinning process. The length of the cotton fiber is long, the uniformity is good, and the short velvet is less, the yarn is high in strength, the strip is evenly dried, the surface of the yarn is smooth, and the hairiness is small.
The length of the cotton fiber is not uniform, and the length and distribution of the cotton fiber are generally indicated by indicators such as the length of the body, the length of the quality, the uniformity, and the short pile ratio. The length of the body refers to the length of the fiber containing the most fiber. The quality length refers to the average length of the portion of the fiber that is longer than the length of the body and is used in the spinning process to determine the roller gauge. The velvet rate refers to the percentage of the fiber weight which is shorter than a certain length limit to the total weight of the fiber. Generally, when the short pile is more than 15%, the yarn strength and the stem will be significantly deteriorated. In addition, there are length indicators such as hand length and span length.
2. Linear density The linear density of cotton fiber refers to the degree of fiber thickness and is one of the important quality indicators of cotton fiber. It is closely related to the maturity and strength of cotton fiber. The linear density of cotton fiber is also one of the main factors determining the spinning number and yarn quality, and is related to fabric feel and gloss. When the fiber is fine, the yarn is strong, the yarn is dry, and the fine yarn can be spun.
3. Maturity The maturity of cotton fiber refers to the degree of thickening of the fiber cell wall, that is, the degree of maturity of cotton fiber, which is closely related to the physical properties of the fiber. Normal mature cotton fiber has thick section, high strength, many turns, good elasticity, mercerized, large cohesion between fibers, and high yarn strength. Therefore, maturity can be seen as a comprehensive indicator of the intrinsic quality of cotton fibers.
4. The strength of the stretch and elastic cotton fiber is one of the necessary conditions for the fiber to have the spinning performance and the use value. When the fiber strength is high, the yarn strength is also high. The strength of cotton fibers is often expressed by the breaking strength and the length of the fracture. The strength of the fine cotton is 3.5 to 4.5 cN, the breaking length is 21 to 25 km, the strength of the long-staple cotton is 4 to 6 cN, and the breaking length is 30 km. Since the strength difference of a single cotton fiber is large, the strength of the cotton bundle fiber is generally measured, and then converted into a strength index of the single fiber. The elongation at break of cotton fibers is 3% to 7%, and the elasticity is poor.
5. Hygroscopic cotton fiber is a porous substance, and there are many hydrophilic genes (-OH) on the cellulose macromolecule, so its hygroscopicity is good. Under normal atmospheric conditions, the moisture regain of cotton fiber can reach 8.5%. about.
6. Acid-resistant alkaline cotton fiber is weak in resistance to inorganic acid. Cotton fiber has a greater resistance to alkali, but it causes lateral expansion.
The cotton cloth can be "silked" with a dilute alkali solution.
In addition, the cotton fiber is also interspersed with impurities and defects, and the impurities include sediment, branches, bell shells, etc., and there are neps and ropes. They affect the amount of cotton used in textiles and also affect the quality of processing and gauze, so they must be inspected and strictly controlled.
Hemp fiber structure performance Hemp fiber refers to a general term for fibers obtained from various hemp plants. There are many varieties of hemp fiber, including bast fiber and leaf fiber. Fiber made from various hemp plants, including the bast fibers of the annual or perennial herb dicotyledon cortex and the leaf fibers of monocots. The bast fiber crops are mainly ramie, jute, ramie, hemp (hemp), flax, apocynum and ramie. Among them, the cell walls such as ramie, flax and apocynum are not lignified, and the fibers are thick and slender and short, similar to cotton. They can be used as textile raw materials, woven into various cool fine linens and summer cloths, and can also be blended with cotton, wool, silk or chemical fiber; The cell walls of jute fiber such as jute and ramie are lignified and the fibers are short. They are only suitable for spinning ropes and sacks for packaging. Leaf fiber is thicker than bast fiber and can only be made into ropes. Hemp crops can also produce raw materials for chemicals, pharmaceuticals and paper. The hemp fiber is bonded to the tablet by the gum. The gum must be removed during the preparation to separate the fibers, which is called degumming. Ramie and linen can be separated into single fibers. The jute fiber is short and can only be separated into appropriately sized fiber bundles for spinning. This fiber bundle is called a process fiber. In the hemp fiber for textiles, colloid and other cellulose are associated with more bacteria. After scouring, the cellulose content of hemp fiber is still lower than that of cotton fiber. The cellulose content of ramie fiber and cotton are close to (more than 95%), the content of flax cellulose is slightly lower than that of ramie, and the cellulose content of jute and leaf fiber is only about 70% or less. The orientation of cellulose macromolecules in the cell wall of ramie and flax fiber is larger than that of cotton fiber, and the crystallinity is also good. Therefore, the strength of hemp fiber is higher than that of cotton fiber, up to 6.5 g/denier; the elongation is small, only cotton fiber Half, about 3.5%, is crisper than cotton fiber. The surface of ramie and flax fiber is smooth, it is easy to absorb water, and the moisture is released to the atmosphere faster; the fiber is relatively straight and not easily deformed. The Egyptians have used lining fiber for 8,000 years, and the shroud of the Egyptian mummies in the tomb is more than 900 meters long. China used ramie as a textile raw material in the Neolithic Age 4000 years ago. The ramie fabric fragments found in the unearthed relics of Qianshan Mountain in Wuxing, Zhejiang Province were relics before 2700 BC.
Both cotton fiber and hemp fiber are burning near the flame, burning rapidly, the flame is yellow, and blue smoke is emitted. The difference between the two smells of burning and the ash after burning is that the cotton burns to emit a paper smell, and the hemp burns to give off the ash smell of grass; after burning, the cotton has very little powder ash, which is black or gray, and the hemp produces a small amount of grayish white powder ash.
Hemp fiber profile Hemp fiber refers to fibers obtained from the stems, leaves and sheaths of hemp plants for textile use. China's hemp fiber is rich in resources, of which ramie production ranks first in the world.
There are many types of hemp fiber, and there are two types of fiber, fiber and leaf fiber. The stem fiber is in the phloem of the stem, so it is also called bast fiber. The bast fiber mainly includes ramie, flax, jute, ramie (also known as kenaf), hemp, ramie and the like. Among them, ramie and linen are superior in quality and are the main hemp fiber for textiles. Jute and hemp are hard and suitable for making sacks and ropes. Another type of hemp fiber obtained from leaves, such as sisal, abaca, etc., is not suitable for taking textile raw materials because of its rough texture, but it has high toughness, strong water resistance, and making fishing nets and ropes.
After the hemp stem is harvested, it is subjected to preliminary processing such as degumming, and spinning is performed by single fiber or fast fiber. The ramie fiber has a large length and can be spun in a single fiber form. In the case of flax, jute, ramie, etc., since the length of the single fiber is short and not uniform, the degummed bundle fiber is used for spinning.
The main physical and chemical properties of hemp fiber 1. Length and linear density The single fiber length of hemp fiber is: ramie length 50 ~ 120mm, flax length 17 ~ 25mm, jute length 2 ~ 4mm, ramie length 2 ~ 6mm. The single fiber linear density of hemp fiber is about 0.91 to 0.4 tex for ramie, 0.29 tex for linen, and about 10 to 28 mm μm for jute. The bundled fiber obtained by the initial processing such as flax is further combed to become a technical fiber suitable for spinning. The linear density of the process fiber is related to the variety of hemp fiber, the degree of degumming and the number of combing.
2. Stretch and elastic hemp fiber is the fiber with the strongest strength and the smallest elongation in natural fiber. The break length of ramie can reach 40-55km, while the breakage of ramie, flax and jute is 2%~4%, respectively. About %, about 3%, hemp fiber is poorly single, and the fabric of hemp fabric is easy to wrinkle.
3. Hygroscopic hemp fiber has strong moisture absorption capacity, among which jute has the highest hygroscopicity, and the moisture regain rate under general atmospheric conditions can reach about 14%. In addition, hemp fiber absorbs moisture and disperses quickly, so its fabric is worn in summer. Cool and comfortable.
4. Acid-resistant alkaline hemp fiber is more resistant to alkali than acid, and in concentrated sulfuric acid, ramie will swell and dissolve.
5. Other properties Hemp fiber has a high initial modulus, a rough handle, good sunlight resistance and electrical insulation, but the heat resistance of ramie and linen is not as good as cotton fiber.
Cotton fiber overview Cotton fiber is the main raw material of China's textile industry, and it plays an important role in textile fiber. China is one of the major cotton-producing countries in the world. At present, China's cotton production has entered the forefront of the world. China's cotton cultivation is almost all over the country. Among them, the Yellow River Basin and the Yangtze River Basin are the main ones, plus the northwest inland, the Liaohe River Basin and South China, a total of five cotton areas.
Cotton is mostly an annual plant. It is developed from the epidermal cells that grow on cotton seeds. Cotton fiber can be divided into three stages: elongation period, thickening period and transition period. There are many types of cotton, and they are currently classified according to the following two methods.
The main physical and chemical properties of cotton fiber 1. Length Cotton fiber length refers to the distance between the ends of the fiber when it is straightened, which is one of the important physical properties of cotton fiber. The length of cotton fiber is mainly determined by factors such as cotton variety, growth conditions, and initial processing. The length of the cotton fiber is closely related to the quality of the yarn and the spinning process. The length of the cotton fiber is long, the uniformity is good, and the short velvet is less, the yarn is high in strength, the strip is evenly dried, the surface of the yarn is smooth, and the hairiness is small.
The length of the cotton fiber is not uniform, and the length and distribution of the cotton fiber are generally indicated by indicators such as the length of the body, the length of the quality, the uniformity, and the short pile ratio. The length of the body refers to the length of the fiber containing the most fiber. The quality length refers to the average length of the portion of the fiber that is longer than the length of the body and is used in the spinning process to determine the roller gauge. The velvet rate refers to the percentage of the fiber weight which is shorter than a certain length limit to the total weight of the fiber. Generally, when the short pile is more than 15%, the yarn strength and the stem will be significantly deteriorated. In addition, there are length indicators such as hand length and span length.
2. Linear density The linear density of cotton fiber refers to the degree of fiber thickness and is one of the important quality indicators of cotton fiber. It is closely related to the maturity and strength of cotton fiber. The linear density of cotton fiber is also one of the main factors determining the spinning number and yarn quality, and is related to fabric feel and gloss. When the fiber is fine, the yarn is strong, the yarn is dry, and the fine yarn can be spun.
3. Maturity The maturity of cotton fiber refers to the degree of thickening of the fiber cell wall, that is, the degree of maturity of cotton fiber, which is closely related to the physical properties of the fiber. Normal mature cotton fiber has thick section, high strength, many turns, good elasticity, mercerized, large cohesion between fibers, and high yarn strength. Therefore, maturity can be seen as a comprehensive indicator of the intrinsic quality of cotton fibers.
4. The strength of the stretch and elastic cotton fiber is one of the necessary conditions for the fiber to have the spinning performance and the use value. When the fiber strength is high, the yarn strength is also high. The strength of cotton fibers is often expressed by the breaking strength and the length of the fracture. The strength of the fine cotton is 3.5 to 4.5 cN, the breaking length is 21 to 25 km, the strength of the long-staple cotton is 4 to 6 cN, and the breaking length is 30 km. Since the strength difference of a single cotton fiber is large, the strength of the cotton bundle fiber is generally measured, and then converted into a strength index of the single fiber. The elongation at break of cotton fibers is 3% to 7%, and the elasticity is poor.
5. Hygroscopic cotton fiber is a porous substance, and there are many hydrophilic genes (-OH) on the cellulose macromolecule, so its hygroscopicity is good. Under normal atmospheric conditions, the moisture regain of cotton fiber can reach 8.5%. about.
6. Acid-resistant alkaline cotton fiber is weak in resistance to inorganic acid. Cotton fiber has a greater resistance to alkali, but it causes lateral expansion.
The cotton cloth can be "silked" with a dilute alkali solution.
In addition, the cotton fiber is also interspersed with impurities and defects, and the impurities include sediment, branches, bell shells, etc., and there are neps and ropes. They affect the amount of cotton used in textiles and also affect the quality of processing and gauze, so they must be inspected and strictly controlled.
Etching Press Blankets,Etching Blankets,Phoenix Printing Blankets,Felt Etching Blankets
Nantong NATASHA Textiles Co.,Ltd. , https://www.ntnatashatextile.com