Regenerated fibers are essentially man-made fibers and are spinnable fibers with different functions and properties obtained through different processing methods. Resources on the earth are divided into organic matter and inorganic matter. Organic matter includes all living organisms, such as animals, plants, etc., and inorganic matter includes metals, minerals, high molecular polymers, etc.
1 Bamboo fiber, bamboo pulp fiber, bamboo charcoal fiber
Common recycled fibers such as bamboo fiber and bamboo pulp are currently on the market Fiber, bamboo charcoal fiber, etc. are usually easily confused. Bamboo fiber is divided into bamboo fiber and bamboo original fiber. It is customary to call bamboo fiber bamboo fiber. Bamboo fiber is made by biochemical treatment to obtain bamboo pulp and then spinning. It is similar to the viscose process, or it is made from bamboo cellulose, bamboo strips, etc. by physical methods such as cooking. The products include Tianzhu fiber, Cloud bamboo fiber, Lai Bamboo Fiber, Bamboo Dyer, etc. Bamboo raw fiber is a product obtained from moso bamboo treated with natural biological agents. It retains the natural antibacterial, anti-mite, and anti-UV functions of bamboo fiber, but its feel is not as good as that of bamboo fiber. Therefore, when promoting products, textile companies generally indicate that bamboo pulp fiber belongs to bamboo fiber, otherwise it is easy to judge it as bamboo fiber.
Lai bamboo fiber (including Zhudale fiber) is a new type of cellulose fiber developed using Lyocell fiber production technology. Its physical indicators are close to Modal fiber (but the dry and wet elongation larger than Modal). Bamboo charcoal fiber is carbonized by pure oxygen, high temperature and ammonia gas barrier, and then processed into nano-sized micron powder emulsion and blended with viscose or polyester spinning solution to form functional fiber, which is significantly different from the above process.
2 Cellulose fiber, cellulose ester fiber
In terms of manufacturing process, regenerated cellulose fiber and cellulose ester There is a clear difference in fiber. In the conventional viscose fiber wet spinning production process, the pulp is impregnated with sodium hydroxide solution, while the cupra ammonia fiber is impregnated with a concentrated ammonia solution of copper hydroxide or alkaline copper salt, ultimately forming cellulose xanthate. ester. Cellulose ester fiber uses cellulose as raw material. For example, the hydroxyl groups of cellulose are esterified to produce cellulose acetate ester, which is spun by dry or wet spinning. The dry strength of cupro ammonia fiber is similar to viscose fiber, but the wet strength and wear resistance are better than viscose fiber. Using a certain proportion in woolen products can significantly improve the smoothness and gloss of the fabric. Acetate fiber is a thermoplastic fiber with long-lasting resistance to pressure and ironing finishing properties. In addition, it has low modulus, soft hand feel, not easy to wrinkle, good elasticity and excellent drape. The above two fibers are commonly used in high-end silk or knitted fabrics, and they are also an option if they are cost-effective.
3 Tencel, Lyocell
Lyocell is known as the “21st century green fiber”. It is a regenerated cellulose fiber used for wet spinning using N-methylmorpholine-N-oxide (NMMO) as a solvent. The waste can be degraded naturally, and 99.5% of the amine oxide solvent used in the production process can be recycled and reused. “It has extremely low toxicity and does not pollute the environment.”
However, industry insiders, media, and even some experts often compare “Tencel®” and “Lyocell” as two types of fibers in academic reports or papers. Comparing Tencel with Lyocell and other 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 company Akzo first applied for a technology and product patent for Lyocell fiber. The British company Courtaulds was one of the first manufacturers to develop Lyocell fiber. Subsequently, Akzo
Nobel (Akzo-Nobel) acquires Courtaulds
65% of the shares, established Acordis company. Finally, the Austrian company Lenzing acquired the Acordis company Corsadi.
Tencel Group, a subsidiary of BV, has since unified the world of Lyocell fiber production. From March 2005, Lenzing decided to use the trade name “Tencel®” for all Lyocell fibers under the group. During this period, the manufacturer of Tencel® was the British company Courtaulds.
So, Tencel® and Tencel® are just the brand names of Lyocell fiber produced by Lenzing Company. They represent the trademark of a fiber product rather than the classification of fiber ingredients. . Since it is a trademark name, the symbol of the registered trademark needs to be added, otherwise it will be a wrong statement. Just like Polyester (polyester) fiber, the varieties include 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 filament mainly uses Akzo
Represented by Nobel’s Newcell®, Lyocell short fibers mainly include Tencel®, Alceru®, Cocel®, Acell®, etc. These varieties are all based on wood pulp as raw materials. Lenzing is the most widely used by spinning companies. Lyocell
Non-fibrillated Tencel® A100, while Tencel®
LF low fibrillation and G100 fibrillation are used for subsequent processing and special needs. Therefore, when writing a paper when you mention Lyocell or Lyocell fiber, you should indicate which trade name it is. You cannot generally compare Lyocell with other manufacturers’ regenerated fiber products, which will cause confusion between individual and overall concepts.
4 Hemp fiber, hemp pulp fiber
my country’s hemp fiber production ranks first in the world.�However, since hemp fiber pretreatment includes health care, moisturizing, pre-opening, etc., the processing process is complex, the processing time is long, the technical requirements are high, and it causes great damage to the equipment, so it is difficult for ordinary cotton spinning mills to get involved. To this end, the China Textile Research Institute has launched Lyocell fiber localization technology research and product development work since 2005, and has made considerable achievements in the environmental protection utilization of “bamboo” and “hemp” resources. Similar to bamboo fiber, hemp fiber is also divided into two types: hemp raw fiber and hemp pulp viscose fiber made from hemp as a cellulose donor. Hemp fiber, like bamboo fiber, is extracted through mechanical separation, flash explosion processing and chemical degumming. Hemp pulp viscose fiber is a regenerated cellulose fiber spun by wet method. The waste can be naturally degraded. Currently, there are holy hemp fiber, Lai Ma fiber, Ma Saier fiber, silk and hemp fiber, etc. By the way, I would like to explain that we often encounter the TM code in the upper right corner of the product name. Different from the trademark ®, TM indicates that the trademark has been applied to the National Trademark Office and an “Acceptance Notice” has been issued to prevent others from making repeated applications.
