Polyester Filament Yarn – A Brief Overview
Polyester Filament Yarn has been on of the good textile products in greater demand due to its tensile capacity. Many products right from fabrics to hosiery and also some home textiles products.
Let me first begin with the manufacturing of filament yarn and then polyester which are amalgamated by a process. Partially oriented tow or partially oriented yarn is made by winding the filamentreceiving cylinder winds at a speed slightly higher than the speed of extrusion. Filaments from a large number of spinning positions are collected to form tow which can later be cut into staple. If the fiber is to be used as continuous filament yarn the filaments are wound onto metal cylinders paper tubes or bobbins. The diameter or fineness of spun yarn filament yarn or monofilament is designated by the term denier which is the weight in grams of 9000 meters of yarn or filament. Yarns for apparel and home furnishings usually have deniers ranging from 80 to 160.
Polyester Fiber spinning and drawing equipment can usually be used to produce other meltspun fibers such as nylon 6 and nylon 66 with relatively minor modification. Waste polyester polymer or fiber is sold reprocessed burned or buried depending largely on the purity. Some of the leading licensors of polyester fiber technology are Zimmer DuPont/Chemtex Inventa KarlFischer and NOY. Polyester fibers are produced by extruding molten polyethylene terephthalate PET through a metal plate or thimble with fine holes called a spinnerette spinning. Next the fibers are drawn to further orient the polymer molecules and to adjust the tensile strength elongation modulus dyeability and other physical properties of the fiber. The fibers are further processed by drawtwisting drawtexturizing spindrawing crimping coiling and looping.
China USA and West Europe have been major polyester importing countries in the last 3 years. On an average China imported close to 950 thousand tons of polyester in the last 3 years 20022004 which was about 10 of China annual consumption. Similarly USA and West Europe imported around 500600 thousand tons which met 30 and 40 of their consumption respectively. Among exporters Taiwan and Korea are large polyester exporters with close to 700900 thousand tons of exports in last three years. To a smaller extent Malaysia Thailand and Indonesia exported about 200300 thousand tons of polyester a year in the last three years. USA too has exported around 700 thousand tons of polyester per annum during 2002 ndash; 2006.
About the writer: YarnsandFibers.com is the largest textile portal in the world. It also has a large collections of buyers suppliers and traders of yarns and fibers.
Related posts: