Acrylic Overview: Uniform fabrics are specially designed for the needs of workers.It can effectively clean, prevent pollution, protect the body from mechanical injury and harmful chemicals, thermal radiation burns, including protection, washing resistance, fungus and mildew resistance, chemical resistance, heat resistance and so on.The composition usually is 100% cotton,100% polyester,cotton/polyester blended,cotton/polyamide blended. Uniform Fabric,Army Uniform Fabric,Workwear Fabric,Combat Uniform Fabric Zhejiang Xinjian Textile Inc.Ltd , https://www.zjxjtex.com
Acrylic is polyacrylonitrile fiber, which is obtained by copolymerizing 85% or more of acrylonitrile and a small amount of second and third monomers by wet spinning or dry spinning. Acrylic began its industrial production in the United States in 1950 and is currently one of the major synthetic fiber varieties. Since acrylic is similar to wool, it is also called "synthetic wool."
Acrylic fiber is mainly produced from short fibers. It can be purely spun or it can be blended with wool or other fibers to make clothing, wool, blankets and knitwear. It is especially suitable for curtains. Nitriles can also be made into filament bundles for processing into expanded acrylic yarns. In addition, acrylic fiber is the main raw material for the production of carbon fiber.
The main physical and chemical properties of acrylic
1. The morphology of acrylic longitudinal or there are a small number of grooves, the cross-section varies with the spinning method, dry spinning fiber section was dumbbell-shaped, wet spinning is round.
2. Strength and elasticity of acrylic fiber is 17.6 ~ 30.8cN/tex, lower than polyester and nylon, its elongation at break is 25% ~ 46%, and polyester, nylon similar. Acrylic is fluffy, curled, soft and elastic. However, the residual deformation of multiple stretches is large. Therefore, the acrylic cuffs and the collar are easily deformed.
3. Hygroscopicity and dyeing Acrylic structure is tight, low hygroscopicity, and the moisture regain is about 2% under normal atmospheric conditions. In addition, acrylic dyeability is not good enough, but cationic dyes can now be used to dye a variety of bright colors.
4. Lightfastness Acrylics have particularly good lightfastness and weatherability, and are the best in common textile fibers. When acrylic is exposed to outdoor air for one year, its strength is only reduced by 20%. Therefore, acrylic is most suitable for outdoor fabrics.
5. Acid and alkali resistant acrylic fiber has good chemical stability, acid and alkali resistance, antioxidant resistance and organic solvents. However, acrylic fibers will turn yellow in the lye, and macromolecules will break.
6. The quasi-crystalline structure of other properties of acrylic fibers makes the fibers thermoelastic, so acrylic fibers can be made into a variety of bulked yarns. In addition, acrylic heat resistance is good, not moldy, not afraid of insects, but poor wear resistance, poor dimensional stability. Acrylic relative density is small.
Polyester dyeing is poor, generally should use high temperature and high pressure dyeing.
4. Other properties Polyester's heat resistance is very strong, light resistance is second only to acrylic, poor conductivity, easy to produce static electricity, fabrics easy to dust and stain. Polyester has good chemical stability and is not prone to mold and insects.
Spandex Overview:
Spandex is a trade name of polyurethane elastic fiber in China. Spandex began its industrial production in 1959. It mainly produces elastic fabrics. It is usually used after weaving spandex and other fibers into a core yarn. It can be used to make all kinds of underwear, bathing suits, tights, jeans, sportswear, elastic parts of the class. Spandex-made garments are comfortable to wear, and can adapt to the needs of various parts of the body to deform, and can reduce the body's sense of restraint.
The main physical and chemical properties of spandex
1. The cross section of the morphology polyester elastic fiber is in the shape of broad bean, and the cross section of the polyether elastic fiber is triangular.
2. The strength of stretch and elastic spandex is very low, and the breaking strength of the filament is about 4-9 cN/tex, but the elongation of the spandex is large, the elongation at break reaches 450%-800%, and the elasticity is very good. Therefore, high elongation and high elasticity are the most important characteristics of spandex.
3. Hygroscopicity and dyeable spandex are poor in hygroscopicity, and the moisture regain is about 0.8% to 1% under normal atmospheric conditions. However, its dyeing performance is better.
4. Other properties of spandex density is better, only 1 ~ 1.3g/cm3. In addition, spandex's acid and alkali resistance, solvent resistance, light resistance, and abrasion resistance are all better.
Polypropylene profile:
Polypropylene is the trade name of polypropylene fiber. It is a fiber made from propylene as a raw material through polymerization and melt spinning. Polypropylene officially began its industrial production in 1957 and is a rising star in synthetic fibers. Because polypropylene has the advantages of simple production process, low cost, high strength, and relatively light density, polypropylene has developed rapidly. At present, polypropylene is the fourth largest variety of synthetic fibers.
Polypropylene production includes short fibers, filaments, and split fibers. Polypropylene membrane fibers are made by first forming polypropylene into a film and then stretching the film to split it into a fibril network. Polypropylene is widely used in the manufacture of industrial fabrics, non-woven fabrics and so on. Such as carpets, industrial filter cloth, ropes, fishing nets, building reinforcements, oil-absorbing blankets, and decorative fabrics. In civil use, polypropylene can be used for pure spinning or blended with wool, cotton, or viscose to make a variety of fabrics. In addition, polypropylene film fibers can be used as packaging materials.
The main physical and chemical properties of polypropylene
1. Polypropylene's vertical surface is smooth and the cross section is circular.
2. The biggest advantage of density polypropylene is its light texture. Its density is only 0.91g/cm3. It is the lightest density among common chemical fibers, so polypropylene with the same weight can get higher coverage than other fibers.
3. Strong stretch polypropylene has high strength, large elongation, high initial modulus and excellent elasticity. Therefore, polypropylene wear resistance is good. In addition, the wet strength of polypropylene is basically equal to dry strength, so it is an ideal material for making fishing nets and cables.
4. Hygroscopicity and dyeability Polypropylene's hygroscopicity is very small, almost no moisture absorption, and the moisture regain is close to zero under normal atmospheric conditions. However, it has a wicking effect and can transmit water vapor through the capillary in the fabric, but does not exert any absorption by itself. Polypropylene has poor dyeability and incomplete chromatogram, but it can be used to make up for deficiencies.
5. Acid-resistant and alkali-resistant polypropylene has good chemical resistance. In addition to concentrated nitric acid and strong caustic soda, polypropylene has good resistance to acids and alkalis, so it is suitable.