Variety classification
Ordinary viscose fiber
（ 1) The cut length of viscose cotton type short fiber is 35~40mm, the fineness is 1.1~2.8dtex (1.0~2.5 denier) and blended with cotton to make fine cloth, validin, gabardine, etc.
(2) Viscose wool type short fiber, cut length 51~76mm, fineness 3.3~6.6dtex (3.0~6.0 denier), can be spun purely or blended with wool, can be made into tweed and coats Wait.
Rich and strong fiber
(1) It is an improved variety of viscose fiber.
(2) Pure spinning can be used to make fine cloth, poplin, etc.
(3) Blended with cotton, polyester, etc. to produce various clothing.
(4) It has good alkali resistance, the fabric is stiff and will not shrink or deform after washing, and it is relatively durable.
Viscose silk
(1) It can be used for clothing, quilt covers, bedding and decorations.
(2) Viscose silk and cotton yarn are interwoven to make feather yarn and thread quilt top.
(3) Viscose silk is interwoven with silk to make georgette, brocade, etc.
(4) Viscose thread is interwoven with polyester and brocade filaments to make crystal satin, antique satin, etc.
Viscose strong yarn
(1) The strength is twice as high as ordinary viscose yarn.
(2) Twisted and woven into cord fabric, used for automobile, tractor and carriage tires.
Production process
Natural fibers extracted from bamboo, cotton, and wood, which have been alkalized, aged, The soluble cellulose xanthate is made through sulfonation and other processes, which is then dissolved in dilute alkali solution to make viscose. After wet spinning, the cellulose is regenerated and precipitated by the action of sulfuric acid in the coagulation bath. The precipitated cellulose is washed, desulfurized, bleached and dried to make viscose fiber. Different types of viscose fibers can be obtained using different raw materials and spinning processes.
Main features
△Source: “Illustrated Textile Materials”
The cross-section of viscose fiber is round in shape Shape or irregular shape, with holes inside, and random grooves on the longitudinal surface.
Viscose fiber has good alkali resistance, but not acid resistance. Its acid and alkali resistance are worse than cotton fiber.
The degree of polymerization of viscose fiber macromolecules is 250~500. The macromolecule crystallinity is lower than that of cotton fiber, generally around 30%. The system is relatively loose, making its breaking strength relatively low. Cotton fiber is small, 16~27cN/tex; its elongation at break is larger than cotton fiber, 16%~22%; its strength in the wet state drops greatly, only about 50% of the dry strength, and its wet strength The body length increases by about 50%; its modulus is lower than cotton, its elastic recovery is poor, its dimensional stability is poor, the fabric is easy to stretch, and its wear resistance is poor. Rich and strong fiber can greatly improve the above shortcomings of viscose fiber, especially the strength in wet state has been greatly improved.
Viscose fiber has a loose structure, and its moisture absorption capacity is due to cotton. It is the fiber with the strongest moisture absorption capacity among common chemical fibers. It expands significantly after absorbing moisture, and the fabrics woven with it shrink greatly and become hard when exposed to water.
Viscose fiber has good dyeing performance and a full dyeing spectrum.
Viscose fiber has good heat resistance and thermal stability.
Because viscose fiber has strong dilution ability, low specific resistance and good antistatic properties.
The light resistance of viscose fiber is similar to that of cotton fiber.
Viscose fiber is man-made fiber (rayon, rayon, artificial wool and chemical fiber clothing, etc.). Viscose fiber fabric has the best moisture absorption performance among chemical fibers, and its wearing comfort and dyeability are better than synthetic fiber fabrics. It feels soft and has beautiful color, which is better than other chemical fiber fabrics. In particular, it has the advantages of pure spun and interwoven silk, brocade and other clothing materials made of light rayon. It is characterized by good gloss, soft and light texture, comfortable wearing, large shrinkage, poor wear resistance, easy fluffing and poor sunlight resistance. Accordingly, when washing and maintaining, you should do the following:
1. Due to its large shrinkage and low wet strength, it should be washed and soaked when washing, and it should not be soaked for a long time. Viscose fiber fabric will harden when exposed to water, so wash it gently to prevent lint or cracks. Use neutral detergent or low-alkali detergent. The temperature of the cleaning fluid cannot exceed 45°C. After washing, fold the clothes and squeeze out a lot of water. Do not twist them. Avoid exposure to the sun after washing. Expose in a cool or ventilated place. When purchasing fabric, make sure it is about 10% longer than the required amount of general cotton, and it should be shrunk before cutting.
2. Use a thinner needle when sewing, and the stitches should not be too dense.
3. It should be changed and washed frequently to prevent deformation after long-term wear. When washing, rub and wash gently, avoid using too much force, and do not use a board brush to prevent lint. After washing, squeeze the water and do not twist it hard to prevent wrinkles; it should be soaked and washed, and wrung out at any time. If soaked for a long time, its strength will be affected; because its sunlight resistance is not good, exposure will�It will fade and lose strength, so it should be dried in the shade in a ventilated place. Drying with water can also reduce wrinkles on clothing.
4. It is best to iron when it is semi-dry, and the temperature should not exceed 100 ℃. If it is dry now, you can place a damp cloth on top of the clothes for ironing, or spray some clean water on them. When ironing, push and pull with less force to allow the garment to expand and align naturally; iron slowly and lightly.
5. Due to poor wear resistance and easy fluffing and deformation, you should try to wear it as little as possible and pull it as little as possible to extend its life.
6. Since it is susceptible to moisture and mildew, it must be washed and dried thoroughly before being stored in a box or cupboard. </p
