What is semi-made POY yarn?
Orientally Oriented Yarn, or POY yarn in short, is the initial state of semi-arranged yarn, and this article provides you with comprehensive information about the production stages of POY yarn, the application of POY yarn, and the characteristics of this yarn.
Yarn production process:
A type of polyester yarn produced by melting PET spinning chips, we call POY polyester yarn, which creates a semi-arranged molecular chain in terms of the type of polymer structure.
The first step of melting Spinning chips:
POY yarn production industry by melt spinning method is very important. In this method, we first place the polyester chips packed in one-ton jumbos in the chips room, then transfer them to the hopper or material storage tank. The transfer of polyester chips located in the chips discharge hopper on the ground floor to the main chips tanks on the fifth floor of the system is carried out by compressed air according to a specific schedule.
The fullness and emptyness of the tanks are constantly checked by sensors, and when this amount reaches its lowest value and the hoppers are being emptied of chips, the chips are transferred to the storage hoppers until the chips exceed the maximum amount. .
Crystallization stage of chips:
The next step is crystallizing the chips. At this stage, the chips enter the crystallizers and we will reduce the amount of water inside the chips by hot air and spraying the chips. At the end of this stage, the chips will never stick together.
Dryer, filtering and extruder stage:
Next, to reduce the remaining moisture in the chips to the size of 0.005, we will enter them into the dryer. The next step is to put the chips into an extruder to turn them into a uniform molten polymer. Then, in order to filter the molten polymer and separate the excess material from it, we enter the filtering stage.
Production of threads:
It is time to transfer the molten polymer to the spinning head section of certain tubes. It should be noted that at this stage, the system is designed in such a way that it prevents the temperature drop of the molten polymer. Now we come to the main stage of production, which enters the molten polymer into gear-shaped pumps. The design of these pumps, which have a metering system, is such that molten polymer passes through each pump according to the desired thread score.
To form threads with the desired grade, molten polymer is introduced into the sprint spinning unit. The sprints have very small holes through which the threads come out. We enter the coaching phase to refresh these courses.
Oiling and winding POY thread:
After cooling, the thread becomes glazed by oiling. Now we are approaching the end of the process, which is the winding of the produced POY yarn on the bobbins by the winders, and finally this process is completed by removing the bobbins from the winder.
All these steps must be done with special care so that the production conditions are suitable. In order to prevent disruptions in procedures and devices.
Features of POY thread:
Yarn grade:
One of the criteria that determines the characteristics of POY yarn is the yarn grade. The yarn grade, which indicates how thin or thick the yarn is, is determined directly and indirectly, and the yarn grade unit is Denier.
The direct method is used to determine the grade of POY yarn. This means that the yarn score is calculated from the ratio of yarn weight to a certain length. For example, the production yarn score of 100 means that 10,000 meters of POY yarn has a weight of 100 grams.
The grade of yarn can be from 90 to 1100, which of course varies in different factories.
In terms of gloss, it is produced in three forms: semi-matte, matte, and super bright.
It is produced in a wide variety of colors and has high optical stability and washing stability
The filament range varies from 24 to 288 according to the thread grade.
Application of POY yarn:
In texturizing factories, this yarn is used as a base yarn for producing DTY yarn and other types of yarn such as ATY, ITY, FDY. Fabrics produced from POY yarn have high flexibility, good hanging ability and high thermal properties. Due to its high application and importance, the production of this yarn is very valuable in the clothing industry.
Uses of POY thread:
We can use this thread in the production of the following items:
All kinds of roomy and curtain fabrics
Production of underwear
women ‘s dress
work clothes
jogging suit
Shirt
socks
Knitted fabrics and
…
In general, the upper detex of this yarn is used in carpet weaving factories and the lower detex is used in the production of clothes and curtains.