Classification of regenerated cellulose

Classification of regenerated cellulose

 

 

[Preface]

 

Recycled cellulose fiber is made from natural cellulose (cotton, hemp, bamboo, trees, shrubs, etc.) as raw materials, without changing its chemical structure, only changing the physical structure of natural cellulose, in order to produce regenerated cellulose fibers with better performance

 

 

[Classified by different processing techniques]

 

Regenerated fibers are natural fibers (such as cotton linter, wood, bamboo, hemp, sugarcane bagasse, reeds, etc.) that are processed through certain chemical processes and spun to reshape cellulose molecules, also known as artificial fibers. Due to the unchanged chemical composition and structure during the processing, manufacturing, and spinning of natural substances, it is also known as regenerated fibers

 

 

Non environmentally friendly processes (such as traditional viscose rayon) involve the sulfonation reaction of alkali treated cotton/wood pulp with carbon disulfide and alkali cellulose to produce a spinning solution, which is then wet spun and regenerated to solidify cellulose

 

 

Distinguish between non environmentally friendly (indirect dissolution method of cotton/wood pulp) and environmentally friendly processes (direct dissolution method of cotton/wood pulp) based on the requirements of processing and regression degradation environmental protection trends

 

[Classified by Main Physical Characteristics]

 

 

Key indicators such as modulus, strength, and crystallinity (especially under wet conditions) are important factors affecting the smoothness, moisture permeability, and drape of fabrics. For example, ordinary adhesive has excellent moisture absorption and easy dyeing, but its modulus and strength are low, especially the wet strength is low. Modal fibers improve the above-mentioned drawbacks of viscose fibers and also have high strength and modulus in a wet state, so they are commonly referred to as high wet modulus viscose fibers. The structure of Modal and the degree of polymerization of cellulose in its molecules are higher than those of ordinary viscose fibers and lower than those of Lyocell. It makes the fabric smooth, the fabric surface glossy and bright, and the drape is better than existing cotton, polyester, and artificial cotton. It has a silk like luster and feel, making it a natural silky fabric

 

 

Tencel

 

Tencel is a solvent based cellulose fiber derived from sustainable wood, with natural raw materials. It is non-toxic and pollution-free, and can be biodegraded after use, without causing pollution to the environment. Therefore, it is called "21st century green fiber" and has obtained an international green environmental protection certificate.
From the initial raw materials, to the final Tencel fabric produced through processes such as dissolution, spinning, and weaving. Advantages and disadvantages: ① Soft and drooping, breathable and skin friendly; ② Natural luster and smooth texture; ③ Durable and durable, with minimal shrinkage; ④ It is very prone to wrinkling due to machine washing and friction.

 

 

Copper ammonia wire

 

 

Although copper ammonia fiber is artificial silk, it is a new green and environmentally friendly regenerated cellulose fiber that can be naturally degraded and extracted from pure natural fabric fibers. Simply put, its ingredients come from nature, using high-quality wood pulp, which is green and environmentally friendly, and can also degrade on its own in the soil.
Similarly, the dyeing and color rendering performance of copper ammonia wire is excellent, so whether it is dyed into various bright colors or printed, the final effect is very good. Advantages and disadvantages: ① The fabric is breathable, smooth, and has a soft luster; ② It also has good moisture absorption and release properties, commonly known as "breathing", achieving warmth in winter and coolness in summer; ③ Good anti-static and suspension properties; ④ After washing, there will be normal shrinkage and fading.