Process of preparation
The two main sources of rayon are petroleum and biological sources. Regenerated fiber is rayon made from biological sources. The process of making mucilage begins with the extraction of pure alpha-cellulose (also known as pulp) from raw cellulose materials. This pulp is then processed with caustic soda and carbon disulfide to produce orange-colored cellulose sodium xanthate, which is then dissolved in diluted sodium hydroxide solution. The coagulation bath is made up of sulfuric acid, sodium sulfate, and zinc sulfate, and the mucilage is filtered, heated (put at a specified temperature for about 18 to 30 hours to reduce the esterification of cellulose xanthate), defoamed, and then wet spun. In the coagulation bath, the sodium cellulose xanthate decomposes with the sulfuric acid, leading to cellulose regeneration, precipitation, and the creation of cellulose fiber.
Classification Rich silk, coarse thread, feather yarn, non-glazed artificial silk
Advantages
With hydrophilic qualities (11% moisture return), viscose rayon is a medium to heavy duty fabric with ordinary to good strength and abrasion resistance. With proper care, this fiber may be dry cleaned and washed in water without static electricity or pilling, and it is not expensive.
Disadvantages
Rayon's elasticity and resilience are poor, it shrinks significantly after washing, and it is also susceptible to mold and mildew. Rayon loses 30% to 50% of its strength when wet, so care must be taken when washing. After drying, the strength is restored (improved viscose rayon - high wet modulus (HWM) viscose fiber, no such problem).
Uses
The final applications for rayon are in the fields of clothing, upholstery, and industry. Examples include women's tops, shirts, undergarments, coats, hanging fabrics, pharmaceuticals, nonwovens, and hygiene goods.
Differences between rayon
Artificial silk has a bright sheen, a slightly coarse and hard texture, as well as a wet and cold feeling. When it is crinkled and uncrinkled by hand, it develops more wrinkles. When it is flattened, it retains lines. When the end of the tongue is moistened and used to pull out the fabric, the artificial silk straightens easily and breaks. When dry or wet, the elasticity differs. When two pieces of silk are rubbed together, they can make a distinctive sound. Silk is also known as "silk," and when it is clenched and then released, wrinkles become less noticeable. Silk products also have both dry and wet elasticity.
Post time: Apr-24-2023