Chemical Fiber Detailed Recycled Fiber Part Basic Characteristics and Morphological Structure of Recycled Fiber
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Viscose fiber
1. The source of viscose fiber
Viscose fiber is made of wood, cotton linters, bagasse, reeds, etc., as raw materials, through a series of physical and chemical processing of fiber. Viscose fiber is the earliest industrialized chemical fiber. In 1905, it was industrialized in the United States. Its raw materials are abundant, the price is cheap, the technology is more mature, and it occupies an important position in the chemical fiber.
At present, there are many varieties of viscose, the most common is ordinary viscose fiber, in addition to high-moisture modulus viscose fiber (such as rich fibers), strong viscose fiber and so on. Viscose fibers are two types of filaments and short fibers, and the length of viscose is also known as rayon. Viscose filaments are often used for pure spinning or interweaving with silk, and there are many fabrics on the market, such as beautiful silk, Fuchunfang, and viscose silk satin. Viscose staple fiber is composed of cotton, wool, and medium-length fibers. Cotton-based viscose staple fiber is commonly known as rayon. It is commonly used for imitation of cotton or blended with cotton and other cotton-based synthetic fibers. Maoe-type viscose staple fibers are commonly used for wool. And other types of wool synthetic fibers blended, medium and long viscose staple fibers are often blended with medium-length polyester blends made of viscose / polyester wool products.
2. Composition and Morphology of Viscose Fibers
The main component of viscose is cellulose, so many properties are similar to cotton. Ordinary viscose fiber is a vertical columnar body with a groove on the surface, a saw-toothed section, and a thick skin without a cavity. The rich and strong fibers are longitudinally smooth and have an approximately circular cross section. 
3. Basic properties of viscose fiber
1 The moisture absorption capacity is better than that of cotton, and the moisture regain can reach about 13% under general atmospheric conditions. The thermal conductivity is good. It is comfortable to wear and is not prone to static electricity. It is not easy to pick up hair and pilling.
2 Dyeing is good, chromatography is complete, colorful.
3 low strength, poor wear resistance, especially wet performance is poor, wet strength is only about 50% of dry strength, intolerance to washing and wet processing, easy deformation under small load, poor dimensional stability; poor fabric elasticity, Wrinkle is serious and not easy to reply.
4 alkali-resistant acid, alkali-resistant than cotton.
5 The viscose fabric has soft and smooth touch, soft luster and good drape. But easy to mold, especially in high temperature and humidity conditions, easy to mold deterioration, maintenance should pay attention.
Acetate fiber
1. Source of acetate fiber
Acetate fibers are made from natural materials containing cellulose after some chemical processing. The long-standing acetate fiber is classified into diacetate fiber and triacetate fiber.
2. Composition and Morphology of Acetate Fibers
The main component of acetate fiber is cellulose acetate. Acetate fibers are straight and smooth in the longitudinal direction and generally have a flower-like cross-section.
3. Basic properties of acetate fiber
Acetate fibers are less absorbent and more comfortable than cellulose fibers. Triacetate fibers are prone to static electricity. The strength of diacetate fiber is poor in viscose fiber and low in wet strength, but the drop in wet strength is not as large as viscose fiber and the wear resistance is poor. Acetate fabrics are lighter in quality and feel smoother and softer. Triacetate fabric is more durable than diacetate fabric. Acetate fibres are weakly chemically resistant, but they are not as acid and alkaline as cellulosic fibres. The moisture regain of diacetate fibers ranges from 6% to 7%, and dry-cleaning is usually used to avoid fabric shrinkage. The moisture regain of triacetate fiber is 2.5% ~ 3.5%. The fabric is not shrinkable and can be washed. Diacetate fibers are poor in heat resistance and difficult to heat set. Triacetate fibers are more heat resistant than diacetate fibers and can be heat set to form pleats.
Diacetate fibers are often filaments, most often in silk style, and are commonly used in linings, ties, and shawls. Triacetate fibers are often short fibers, blended with nylon, used for weaving warp-knit fabrics, blouses and skirts. Triacetate fiber has better elasticity and elasticity than diacetate fiber and cellulose fiber.
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