Polyester yarn

Hot selling Polyester Yarn in Dope Dyed Black From 15D to 300d

Production characteristics of polyester filament

The spinning, drawing and deformation processing of polyester filament are carried out on each spindle position. When the latter process processes the former ingot, although some defects can be improved or made up by adjusting the process of the latter process, some defects can not be made up, but may be magnified, such as the difference between ingot positions. Therefore, reducing the difference between spindles is the key to ensure the quality of filament. With the development of spinning technology, polyester filament production has the following production characteristics.

High production speed

With the development of filament production technology, the spinning speed is getting higher and higher, and now most of them have reached 3500m / min. With the increase of spinning speed, higher requirements are put forward for process, equipment and operation.

Large package capacity

The net weight of the winding bobbin is increased from 3 ~ 4kg to 15kg, and the deformed bobbin is increased from 1 ~ 2kg to 5kg. With the increase of the package capacity, new requirements are put forward for the winding mechanism, the uniformity of the bobbin quality and the packing and transportation of the bobbins.

High quality requirements for raw materials

The quality of polyester raw materials is closely related to the spinnability of filament and the quality of products. In addition to the quality indexes of chips, such as intrinsic viscosity number, softening point, diethylene glycol content, carboxyl content, ash content and agglomerated particles, the appearance shape of chips, the presence or absence of carbon black particles, the distribution of relative molecular weight and moisture content also have great influence on spinnability, especially the water content has a greater influence on high-speed spinning, and the ancient water content of chips is required to be no more than 30-50ppm 。 It is required that the quality of raw materials reach the quality index, and the quality between batches is stable and consistent.

Strict process control

Filament production requires strict process parameters. For example, the temperature difference between the upper and lower sides of the spinneret should not be greater than 1 m / s. There are also higher requirements for public works (such as water, gas, steam and electricity).

Total quality management is required

Filament production is a multi spindle position, multi machine assembly line operation, frequent operation, labor-intensive, management work is closely related to the quality of filament. In order to ensure the quality of products, it is necessary to implement total quality management and establish quality assurance system.

Inspection, packaging, storage and transportation are required

In order to ensure the quality of filament, the physical indexes of each batch of raw materials should be inspected, the appearance defects of winding bobbins should be inspected one by one, and the dyeing properties of finished silk should be sampled or all inspected. Different specifications should not be mixed in the packaging process. In addition, attention should be paid to warehousing and transportation. Storage should not be exposed to the sun and night, stacking boxes should not be too high, loading and unloading should be handled with care, and bumps should be avoided in transportation.

Our high-strength polyester yarn is made of polyester filament, which is characterized by good strength and gloss. It is mainly used for sewing jeans, automobile supplies, bags and so on.