PFY – Polyester Filament Yarn
Polyester filament yarn (PFY) is a long chain or synthetic polymer composed of an ester of a substituted aromatic carboxylic acid such as terephthalic acid.
Polyester filament yarns are manufactured in a wide range of deniers and properties to suit virtually all textile requirements.
Its physical characteristics include appearance Solid (form: Bobbin, Beam), Colour - Raw-white, white or dyed, Odourless, Melting point/range 240 - 260 °C, relative density 1.3 – 1.4 g/cm3, Insoluble in common solvents.
Filament yarns, which are made from PET polyester strands that are grouped together, are available as either monofilament, which is made from one untwisted strand of polyester, or multifilament, which is made from a group of polyester strands that are twisted depending on the fabric's use.
In 1935, the DuPont Chemical Company created polyester, and the fiber from the chemical compound was strong enough to be twisted into yarn similar to natural fibers.
Source of technology for PFY manufacturing is from either PFY manufacturing companies like Du-Pont, Toray, Teijin or from engineering companies like Zimmer, Lurgi, Didier, Inventa, Chemtex etc. Major manufacturers of PFY in India are Baroda Rayon, Century Enka, Garware Nylons, J.K. Synthetics, Modipon, Nirlon, Orkay, Reliance and Shree Synthetics.
Major international producers are Du-Pont, Celanese, Hoechst, Chung Shing, Far Eastern, HualonTeijin, Nan Ya Plastics, Oriented Chemical (Taiwan), Kolon, Sung Yong, Tong Yang (Korea), Toyobo, Toray, Teijin, Kanebo (Japan), AOC, Ashland Performance Chemicals, DAK Americas, LLC, Diolen Industrial Fibers BV, E. I. du Pont de Nemours and Company, Far Eastern Industrial (Shanghai) Co., Ltd., Hyosung, Indo Rama Synthetics, Invista, JBF Industries Limited, Kolon Industries, Inc., Kordsa Global, Mitsubishi Chemical Corporation, Montefibre SpA, Nan Ya Plastics Corporation, Performance Fibers, Inc., Reichhold, Inc., Unifi, Inc., and Zhejiang GuXianDao Industrial Fiber Co., Ltd are some of the leading producers of PFY.
Nirlon started manufacturing PFY for the first time in India in 1967.
In 2011-12 total polyester filament production in India was around 1388 KTA which reached 2763 KTA in 2015-16 and is expected to touch 3025 KTA in 2016-17.
PFY is mainly used in Home Furnishing Fabrics, Fashion Fabrics, Denim, Terry Towel and others.
Filament yarn having trilobal bright lustre is widely used in making curtains, bed-sheets and carpets.
Polyester filament yarns is used in knitting and weaving to make design on frocks and home-textiles and making of webbings .
Polyester filament yarns are manufactured either from molten polymer or polyethylene terephthalic acid (PET) chips by melt spinning process. In this process molten polymer from a manifold is metered through various spinnerettes, having number of holes, to form filaments. These filaments are then solidified by air-quenching and wound on take-up winders after application of spin-finish. The yarns manufactured could be UDY (un-drawn yarn), POY (partially oriented yarn) or FDY (fully drawn yarn)depending upon the winder speed and heat setting methods.