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The manufacturing method of pure polyester yarn is an important product in the field of chemical production raw materials, widely used in industries such as textiles and clothing. This article will introduce the manufacturing method of pure polyester yarn, including the selection of raw materials, processing technology, post-treatment, and other aspects

1、 Raw material selection: The manufacturing of pure polyester yarn first requires the selection of suitable raw materials. Polyester is a synthetic fiber with good physical properties and chemical stability, making it the main raw material for manufacturing pure polyester yarn. When selecting polyester raw materials, it is necessary to consider their molecular weight, melting point, viscosity and other indicators to ensure that the subsequent processing process can proceed smoothly

2、 Processing technology 

1 Melt extrusion 

Add polyester raw materials into a high-temperature and high-pressure extruder, and melt and plasticize the polyester through the rotation and heating of the screw. Melted polyester forms filaments through the outlet of the extruder and enters the next processing step

2. Tensile deformation 

After cooling, the molten extruded wire strip enters the tensile deformation machine for tensile deformation treatment. By high-speed stretching and air spraying, the shape of the filament is changed, increasing its strength and elasticity

3. Twisting 

The stretched and deformed filament enters the twisting machine, and its twist is increased through twisting treatment to improve the structure and stability of the yarn. During the twisting process, attention should be paid to controlling the twist and tension to ensure the quality of the yarn

4. The twisted yarn is wound into a certain shape through a winding machine to facilitate subsequent textile processing. During the winding process, it is necessary to control the winding tension and speed to maintain the winding density and shape of the yarn

3、 Post processing 

1 Heat setting treatment is required to eliminate internal stress and improve the dimensional stability of pure polyester yarn during processing. During the heat setting process, temperature and time need to be controlled to ensure the quality and performance of the yarn

2. Testing Grading 

The yarn that has undergone heat setting treatment needs to undergo quality testing and grading to ensure that it meets relevant standards and customer requirements. The testing content includes indicators such as yarn strength, twist, and evenness

4、 Notes 

1 Throughout the manufacturing process, it is necessary to maintain the cleanliness and good operating condition of the equipment to avoid equipment failures and product quality issues

2. The storage and transportation of raw materials need to pay attention to measures such as moisture-proof and sun protection to ensure the quality and performance of the materials

During the manufacturing process, attention should be paid to controlling various process parameters to ensure the quality and performance of the product

In short, the manufacturing of pure polyester yarn requires multiple process steps and post-treatment processes, and strict control of various process parameters and quality indicators is required to ensure the quality and performance of the product. At the same time, it is necessary to pay attention to the maintenance and upkeep of equipment, as well as the storage and transportation of raw materials, to ensure the smooth progress of production and the stability of product quality.