How Polyester Yarn Is Manufactured In The Industry
October 15, 2013 Leave a comment
There are many ways for making filament yarns and out of them, the Polyester Yarn is made through the Melt Spinning Process industrially. Out of the processes, melt spinning process is used for manufacturing polyester, polypropylene, polyamide and polyurethane filament yarns. The dry spinning process is used for making acetate and acrylic fiber yarns. Polyester filament manufacturing is the most widely practiced industrial process in this field.
In the first stage of making Polyester Yarn by the melt process, the polyester chips are dropped in the Feeding Hopper, which is a funnel shaped mechanism. The chips are fed with the help of a conveyor belt. From the Hopper, the contents are sent to the DGP section of the machine from where they are again conveyed to the storage silos through air-compressed and pressurized tubes. From the storage silos the chips are taken to the Blender for proper blending. After the blending process is complete, the chips are conveyed to a Wet Chips Hopper and stored there. The amount of chips in this Hopper is auto-controlled so that too much chips do not fall in. From the Hopper they are transferred to the Drying System of the machine through an air lock.
It is important during the whole process not to let air get in. In the Drying System the chips are dried by hot air to control the moisture levels in the polyester chips. From here, once the chips are dried, there are sent to the Dry Chips Hopper and then finally to the Extruder, but before it reaches the extruder the dried chips are melted into a homogenous molten polyester substance by heaters. This substance is filtered through the Polymer Filters. This filtered polymer substance is distributed among four spinning beams where the temperature is maintained by a special machine that transfers heat. Here the melted polymer is purified through sand and metallic filters before going out through the spinnerets. In most modern machines the extruder can melt polymer chips and give an output of 800 kilograms of chips every hour under 250 Bars of pressure.
The molten polymers in the spinning beans are left through the spinnerets after it goes through the polymer pump, where the speed is controlled by industrial computers. The melted polymers that pass out from the spinnerettes finally are in form of a yarn and are very hot as they are still at a temperature of 290°C. So naturally the cooling comes next, where the Polyester Yarnis cooled and the yarn is solidified. After it is cooled and solidified, the finishing oil is applied to the yarn to lubricate the surface, both for protection, texture and more processing. Finally at the end of the process the end product, the Polyester Yarn, is excited by the winder.
After the main manufacturing process is over the yarn thus created is sent to the texturing department where it is layered and textured by machines. After the final heating and cooling the Polyester Yarn are packaged and sent to the markets.
External: – Directory consisting information of manufacturers, suppliers and exporters of polyester yarn and yarn products.
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