Polyester Yarn Process
Basic process and process
Tops→blending→needle combing→roving→spinning→doubling→twisting→inspection→packing of finished products.
Spinning fibers into yarn generally go through the main processes of blowing, carding, drawing, roving, and spinning. Yarns and threads for high-end products also require additional combing operations.
Different processing procedures are required to produce cotton yarns with different requirements, such as spinning pure cotton yarns and polyester-cotton blended yarns. Due to the different raw materials used, the physical properties of various raw materials are different, and the product quality requirements are different. Different production processes are required. (With the update of modern equipment, the process has also been adjusted to varying degrees, and the equipment can merge some of these processes together, making the actual observation less work that was originally necessary)
(1) Process flow of pure cotton yarn
1. Carded yarn: blowing → carding → first and second → roving → spinning → post-processing
2. Combed yarn: blowing→carding→pre-coupling→sliver roll→combing→heading→two-coupling→triple-coupling→roving→spinning→post-processing
(2) The technological process of polyester-cotton blended yarn
1. Carded yarn: raw cotton: blowing → carding →
Polyester: Blowing → Carding →
2. Combed yarn:
Raw cotton: blowing → carding → pre-combing → sliver roll → combing →
Polyester: blowing → carding → pre-merging →
The difference between weaving yarn and knitting yarn
Woven yarn requirements: high strength, less neps.
Knitting yarn is relatively stronger than woven yarn, but requires high details, and the twist is not as high as that of woven yarn.
Generally, the twist coefficient of woven yarn is about 380, while knitting yarn only needs about 340.
For example, 40s single yarn, the twist of woven yarn is 99 twists/10cm, while the knitted yarn is about 88-89 twists.
What is the difference between viscose yarn and cotton-like viscose rayon?
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The production method of cotton yarn is more complicated
Cotton yarn is a yarn made from cotton fibers through a spinning process, and is called cotton thread after plying.
Definition of polyester yarn
Where is the quality of polyester-cotton blended yarn 60 counts 80 counts?