Lyocell is a brand-new fiber product, which is obtained directly after NMMO dissolving the pulp, after spinning and after-treatment. The process is simple but not easy. In the textile industry, this revolutionary product has become almost hot. Whether it will obviously pull the demand for pulping, whether it will go through the recycling system of raw materials through waste paper, rags and special paper, if the answer No, we can't know nothing about Lyocell.
In the ordinary man-made fiber family, its manufacture often requires the addition of strong acids, alkalis, and other active substances in the pulp, and the production of derivatized cellulose by chemical reactions such as sulfonation and acetylation. The production of Lyocell is purely physical dissolution of wood or non-wood fiber pulp. The solvent used is NMMO with an appropriate proportion of water. NMMO is N-methyl morpholine, which can be recycled after use, and the recovery rate can reach more than 95%. NMMO itself is non-toxic and non-corrosive. It does not need to use and discharge any acid, alkali and other chemical substances in large quantities during production. Therefore, regardless of the product produced or the production process itself, it is clean and harmless, and it is also energy and chemical. The consumption of water is significantly lower than that of other man-made fibers. So Lyocell has a reputation of "21st century environmental protection fiber."
Lyocell can grow filaments and short filaments and can be widely used in the production of various types of textiles, nonwovens, cigarette filters, disposable articles, packaging materials and agricultural products. In the process of dissolving the slurry, by adding appropriate additives, functional Lyocell products with different characteristics can be obtained, so as to have various properties such as conductivity, anti-static, flame-retardant, antibacterial, and even ceramization. Some of the important characteristics of Lyocell fiber are compact structure, high degree of cellulose polymerization, high degree of crystallinity, and high degree of orientation, low lateral cohesion between chain macromolecules. This “three highs and one low†leads to: The fiber wet strength is very high, can reach 85% of the dry strength, which is far beyond the viscose fiber; easy to fibrillate in the case of infiltration and mechanical action, resulting in The appearance of hairy feeling. If the latter does not take measures, it will cause the fabric to lose its luster, or affect the printing and dyeing effect. However, bringing about troubles at the same time, it can provide the conditions for the development of new types of fabrics such as suede, peach, and antique.
Lyocell's manufacturing technology may seem simple, but the process control conditions are very strict, and it is almost lost. The Netherlands AKZO NOBEL company spent more than 10 years before it was successfully developed. Only a few countries in the world such as the Netherlands, Austria, Germany, Russia, South Korea, and Japan can manufacture this product on their own. The total global production now is more than 100,000 metric tons, and it is predicted that by 2005, it will reach 300,000 tons. To build a production line with a production capacity of 30,000 t/a, with a production value of 105 million U.S. dollars, which would require an investment of 175 million U.S. dollars, half of which is required for the purchase of equipment.
In view of Lyocell's attractive market prospects and huge economic potential, relevant parties in China are actively striving to directly introduce technical equipment or develop their own to solve the technical problems in Lyocell's production. At the same time, many manufacturers have also imported Lyocell fiber to pioneer the development of Lyocell fabrics and other downstream products.
In the ordinary man-made fiber family, its manufacture often requires the addition of strong acids, alkalis, and other active substances in the pulp, and the production of derivatized cellulose by chemical reactions such as sulfonation and acetylation. The production of Lyocell is purely physical dissolution of wood or non-wood fiber pulp. The solvent used is NMMO with an appropriate proportion of water. NMMO is N-methyl morpholine, which can be recycled after use, and the recovery rate can reach more than 95%. NMMO itself is non-toxic and non-corrosive. It does not need to use and discharge any acid, alkali and other chemical substances in large quantities during production. Therefore, regardless of the product produced or the production process itself, it is clean and harmless, and it is also energy and chemical. The consumption of water is significantly lower than that of other man-made fibers. So Lyocell has a reputation of "21st century environmental protection fiber."
Lyocell can grow filaments and short filaments and can be widely used in the production of various types of textiles, nonwovens, cigarette filters, disposable articles, packaging materials and agricultural products. In the process of dissolving the slurry, by adding appropriate additives, functional Lyocell products with different characteristics can be obtained, so as to have various properties such as conductivity, anti-static, flame-retardant, antibacterial, and even ceramization. Some of the important characteristics of Lyocell fiber are compact structure, high degree of cellulose polymerization, high degree of crystallinity, and high degree of orientation, low lateral cohesion between chain macromolecules. This “three highs and one low†leads to: The fiber wet strength is very high, can reach 85% of the dry strength, which is far beyond the viscose fiber; easy to fibrillate in the case of infiltration and mechanical action, resulting in The appearance of hairy feeling. If the latter does not take measures, it will cause the fabric to lose its luster, or affect the printing and dyeing effect. However, bringing about troubles at the same time, it can provide the conditions for the development of new types of fabrics such as suede, peach, and antique.
Lyocell's manufacturing technology may seem simple, but the process control conditions are very strict, and it is almost lost. The Netherlands AKZO NOBEL company spent more than 10 years before it was successfully developed. Only a few countries in the world such as the Netherlands, Austria, Germany, Russia, South Korea, and Japan can manufacture this product on their own. The total global production now is more than 100,000 metric tons, and it is predicted that by 2005, it will reach 300,000 tons. To build a production line with a production capacity of 30,000 t/a, with a production value of 105 million U.S. dollars, which would require an investment of 175 million U.S. dollars, half of which is required for the purchase of equipment.
In view of Lyocell's attractive market prospects and huge economic potential, relevant parties in China are actively striving to directly introduce technical equipment or develop their own to solve the technical problems in Lyocell's production. At the same time, many manufacturers have also imported Lyocell fiber to pioneer the development of Lyocell fabrics and other downstream products.
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