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regenerated fiber

  • Regenerated fibers are essentially man-made fibers, which are spinnable fibers with different functions and properties obtained through different processing methods. The resources on the earth are divided into organic matter and inorganic matter. Organic matter includes all living organisms, such as animals and plants, and inorganic matter includes metals, minerals, and polymers.

    1 Bamboo fiber, bamboo pulp fiber, bamboo charcoal fiber

     

    At present, regenerated fibers such as bamboo fiber, bamboo pulp fiber, bamboo charcoal fiber, etc. are common in the market, which are often confused. Bamboo fiber is divided into bamboo fiber and bamboo fiber, and it is customary to call bamboo fiber bamboo fiber. Bamboo fiber is processed by biochemical methods to obtain bamboo pulp and then spun, which is similar to viscose technology or processed by physical methods such as bamboo cellulose, bamboo strips, etc. Lai Bamboo Fiber, Bamboo Dyer, etc. Bamboo fibril is a product obtained from bamboo treated with natural biological agents, which retains the natural antibacterial, mite removal, and anti-ultraviolet functions of bamboo fiber, but the hand feel is not as good as that of bamboo fiber. Therefore, textile companies generally indicate that bamboo pulp fiber is bamboo fiber when promoting products, otherwise it is easy to judge as bamboo fiber.


    Lay bamboo fiber (including Bamboo Dyer fiber) is a new type of cellulose fiber developed by Lyocell fiber production process. The physical indicators are close to Modal fiber (but the dry and wet elongation is greater than Modal). Bamboo charcoal fiber is carbonized by pure oxygen high temperature and ammonia gas barrier, and processed into nano-scale micro-powder emulsification, added with viscose or polyester spinning solution and blended to form functional fiber, which is obviously different from the above process.

     

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    2 Cellulose fiber, cellulose ester fiber

     

    In the manufacturing process, regenerated cellulose fibers are significantly different from cellulose ester fibers. In the conventional viscose fiber wet spinning production process, the pulp is impregnated with sodium hydroxide solution, while the cupro ammonia fiber is impregnated with a concentrated ammonia solution of copper hydroxide or alkaline copper salt, and finally forms cellulose xanthate ester. Cellulose ester fibers use cellulose as a raw material, for example, the hydroxyl groups of cellulose are esterified to produce cellulose acetate, which is spun dry or wet. The dry strength of cupro fiber is similar to that of viscose fiber, but its wet strength and wear resistance are better than viscose fiber. Using a certain proportion in woolen products can significantly improve the smoothness and luster of the fabric. Acetate fiber is a thermoplastic fiber, which has long-lasting pressure-resistant finishing properties, plus low modulus, soft hand feel, not easy to wrinkle, good elasticity, and excellent drapability. The above two kinds of fibers are commonly used in high-grade silk or knitted fabrics, and they are also a choice under the premise of good cost performance.


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    3 Tencel, Lyocell


    Lyocell, known as "21st century green fiber", is a wet spinning regenerated cellulose fiber using N-methylmorpholine-N-oxide (NMMO) as a solvent. The waste can be degraded naturally, and 99.5% of the amine oxide solvent in the production process can be recycled. "Extremely low toxicity, and does not pollute the environment."


    However, people in the industry, the media, and even some experts often compare "Tencel®" and "Lyocell" as two fibers in academic reports or papers. The comparison of cellulose fibers makes people more and more confused. For this reason, it is necessary to briefly review the origin of Lyocell. In 1980, the Dutch Akzo (Akesu) company first applied for the process and product patent of Lyocell fiber, and the British Courtaulds (Courtaulds) company was one of the earliest manufacturers to develop Lyocell fiber, and then Akzo Nobel (Akezo-Nobel) acquired Courtaulds 65% of the shares, the company Acordis was established. In the end, Lenzing (Lenzing) of Austria acquired the Tencel Group Company under Corsadi BV of Acordis Company. Since then, Lenzing has unified the production of Lyocell fibers. From March 2005, Lenzing decided to use the trade name "Tencel". ®" for all Lyocell fibers under the group. During this time period, the manufacturer of Tencel® was the British Courtaulds (Courtaulds).

     

     

    Therefore, Tencel® and Tencel® are just the brand names of Lyocell fibers produced by Lenzing, which represent the trademark of a fiber product, not the classification of fiber components. Since it is a trademark name, it needs to add the symbol of the registered trademark, otherwise it will be a misrepresentation. Just like Polyester (polyester) fiber, there are PET, PBT, PTT, cationic dyeable polyester, etc., Lyocell is the name of the fiber category, and ordinary Lyocell fiber includes filament and staple fiber. Lyocell filaments are mainly represented by Akzo Nobel's Newcell®, and Lyocell staple fibers are mainly Tencel®, Alceru®, Cocel®, Acell®, etc. These varieties are all made of wood pulp, which are used the most by spinning companies. The most widely used is Lenzing Lyocell non-fibrillated Tencel® A100, while Tencel® LF low-fibrillated and G100 fibrillated are used for downstream processing and application specific needs. Therefore, when writing a paper, when Lyocell or lyocell fiber is mentioned, it should indicate which trade name it is. It is not possible to compare Lyocell with other manufacturers' regenerated fiber products in a general way, resulting in confusion between the individual and the overall concept.

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