Viscose is one of the old fiber varieties. In 1891, the British people Cross, Bevan and Beadle first made cotton sodium citrate solution from cotton. Because of the viscosity of this solution, it was named. For "adhesive". When the glue is in contact with acid, the cellulose will re-precipitate. According to this principle, in 1893 it developed into a method of making cellulose fibers, which is called "viscose fiber". By 1905, Muller of Germany invented a coagulation bath composed of dilute sulfuric acid and sulfate, which realized the industrial production of viscose fiber viscose fiber, also known as rayon, ice silk, viscose filament. In recent years, new varieties called Tencel and bamboo fiber have appeared. Among the 12 main textile fibers such as cotton and silk, the moisture content of the viscose fiber is most in line with the physiological requirements of human skin. It also has the characteristics of smooth, cool, breathable, antistatic, and dyeing.
The properties of viscose fiber are very similar to those of natural cotton fiber. At present, viscose is widely used in silk, weaving, knitting, weaving and thread making, and the industry of knitting. It can be woven into beautiful silk, rich spring spinning and various kinds. Silk is quilted, and it can be interwoven with fibers such as wool, hemp, silk, etc. It can also be interwoven with cotton yarn, silk and synthetic fibers into feather yarn, soft satin and fragrant scent. Due to its comfortable wearing, it is especially suitable for making underwear. Viscose fiber is an important fiber product with the most market competitiveness of chemical fiber products in China. Second, why is it that the sticky fiber is better than cotton because of cotton? Viscose fiber is mainly made of cotton or wood fiber as the raw material. Its biggest characteristic is that it is very similar to some of the natural cotton fiber, such as moisture absorption, breathability, easy dyeing, antistatic and easy spinning. But the viscose is more pure than the nature of natural cotton fibers. The cellulose content of the viscose is above 99.5%, while the cotton fiber is 95-97%; the fat and wax of the viscose fiber is 0.2-0.3%, the cotton fiber is 0.5-0.6%; the viscose is free of chlorine, cotton fiber The chlorine content in the medium accounted for 1-1.1%; the viscose did not contain pectin and polypyrene, while the cotton fiber contained 1.2%; the other ash content of the viscose was trace, and the ash content of cotton fiber reached 1.14%. Viscose is resistant to sunlight, insects, heat, chemicals, melts, and molds. Its main properties are more comprehensive in its main textile fibers. Therefore, the viscose has "the essence of cotton, the quality of silk" and is an authentic ecological fiber. It is derived from nature and is superior to nature. Third, why does the viscose fiber best meet the physiological needs of human skin moisture? Some experts wrote in "Man-made Fibers" that when the surface water of human skin is 12-15%, the skin is smooth and elastic. Once the skin is short of water, it becomes dry, and then it becomes rough and wrinkles appear over time.
Therefore, it is required that the textile must have a certain hygroscopicity and permeability, and the moisture regain of 12-14% of the fiber is used to ensure the moisture content of the skin surface layer of 12-15%. The standard equilibrium moisture regain of the main textile fibers: 7-8.5% for cotton, 14-16% for wool, 9-11% for silk, 12-14% for viscose, 0 for polypropylene and chlorene, 0.4-1.3% for spandex, and polyester for 0.4-0.5%, ramie 7.0-10.0%, etc.
It can be seen that the moisture regain of the viscose fiber is most in line with the requirements of human skin moisture. Breathable and sweat-absorbent when it is hot; it can moisturize when it is cold, it does not produce static electricity, it is soft and comfortable, especially in line with the physiological needs of human skin. This main feature of viscose is that a large amount of cellulose containing a large amount of hydrophilic groups [-hydroxy (-OH)] can adsorb water molecules and hydrate, and at the same time, the crystallinity of viscose is higher than other The low properties of textile fibers are determined. They also made such a scientific statement that even cotton underwear is not as good as viscose underwear for human skin moisturizing requirements. The wool fiber is slightly higher than the skin moisture content of 12-15% of the skin surface. Although it is kept warm, it is easy to carry static electricity. From this point, it is not as good as viscose. Because the viscose has the characteristics of keeping the human skin in the most moist state, it is used in underwear, pajamas, T-shirts, and shirts, and is also used in the production of cheongsam and Tang suits. 4. What harm does clothing static have on people? What is the antistatic performance of the viscose? In winter, the air is too dry, and static electricity is easily generated between human skin and clothing. The high static voltage can reach tens of thousands of volts, which will cause damage to the human body. Some people have investigated and measured the static electricity generated in daily life. Walking on the carpet can generate 1500 ~ 35000 volts of static electricity. When walking on the vinyl resin floor, it can generate 250 ~ 12000 volts of static electricity. Static electricity above 1800 volts. The level of static electricity depends mainly on the humidity of the surrounding air. Usually, if the static interference exceeds 7000 volts, people will have a shock.
Relevant information shows that static electricity is very harmful to the human body. Long-lasting static electricity can increase the alkalinity in the blood, reduce the calcium content in the serum, and increase the calcium excretion in the urine. This is for the growing children, the elderly with very low blood calcium levels, and the pregnant women who need a lot of calcium. And the mother and the child are undoubtedly worse. Excessive static electricity builds up in the human body, which also causes abnormal conduction of current in the nerve cell membrane of the brain, affecting the central nervous system, leading to changes in blood pH and oxygen characteristics of the body, affecting the physiological balance of the body, causing dizziness, headache, irritability, and insomnia. , loss of appetite, mental paralysis and other symptoms. Static electricity can also interfere with blood circulation, immunity and nervous system, affecting the normal operation of various organs (especially the heart), which may cause abnormal heart rate and premature beats. In winter, about one-third of cardiovascular disease is associated with static electricity. In flammable and explosive areas, the human body is electrostatically charged and may even cause a fire.
Recently, the Ministry of International Trade and Industry of Japan raised awareness of the damage caused by clothing to the skin. According to some surveys, 600 out of 1,500 people have different feelings of clothing damage to the skin. Nylon, polyester, polypropylene fiber and acetate fiber fabrics have a prominent problem that causes skin inflammation. They followed up on patients with premature heart beats and found that some patients had no organic heart disease, and there was no cause of arrhythmia caused by smoking, alcohol, or medication. Their total
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