CLANAE 20.300—Manufacturing of manufactured fibers

Where 20.300 sits

1. C Manufacturing industry
2. 20 Manufacturing of chemical substances and products
3. 20.3 Manufacturing of manufactured fibers
4. 20.30 Manufacturing of manufactured fibers
5. 20.300 Manufacturing of manufactured fibers

What 20.300 includes

• The manufacture of manufactured fibers generally encompasses artificial and synthetic fibers. While the origin of the raw materials differs, the spinning and dyeing processes are similar. Both types of fibers are formed by forcing a gelatinous substance obtained from the base raw material (cellulose or chemicals) through small holes (called spinnerets). As the filaments emerge from these holes, they solidify using systems specific to each fiber, process, or technology. Unlike natural fibers, in the spinning process, the fibers must not be parallel. The resulting filament is called a continuous filament; when these are bundled without specific twist into a cable, it is called a tow, and if it is cut, it is called a staple fiber. The reason for obtaining staple fibers is to allow them to be blended with other fibers. Artificial fibers are obtained through the chemical treatment of cellulose contained in cotton linters or wood pulp, for example, rayon (continuous filament) or rayon (staple filament). Synthetic fibers are produced from chemical substances according to the following scheme: * Polymers obtained by polycondensation or polyaddition: Polyamide yarns: nylon 6.6 obtained from adipic acid and hexamethylenediamine (HMDA) and nylon 6 obtained from caprolactam. Polyester yarns: manufactured from dimethyl terephthalate (DMT) and ethylene glycol. Polyurethane yarns: where the raw materials are butanediol and hexamethylenediisocyanate. * Polymers by polymerization: Polypropylene yarns: produced from propylene. Acrylic yarns: produced from polyacrylonitrile.
• The manufacture of: - Staple fibers and tow of artificial or synthetic filament, uncarded and uncombed - Synthetic or artificial fibers or strands without filament (e.g., artificial straw and polypropylene raffia) - High-strength, multi-ply or cabled yarns of synthetic or artificial filament - Textile and industrial yarns mentioned above

What 20.300 excludes

• Texturing, drawing, and other processes performed outside the chemical plant where they originated. The manufacture of woven, plied, cabled, or otherwise processed yarns from filaments, tow, staple fibers, and yarns not produced in the same unit (subclass 13.113).
• The manufacture of yarns from manufactured staple fibers (subclass 13.113).

20.300 in other systems