The process flow of yarn

Basic processes and procedures

Wool top → Mixed top → Needle combing → Roving → Fine yarn → Blending → Shaking and twisting → Inspection → Finished product packaging.

Spinning fibers into yarn generally involves major processes such as clearing, carding, drawing, roving, and spinning. The yarn and thread used for high-end products also require an additional combing process.

To produce cotton yarn with different requirements, different processing procedures need to be adopted, such as spinning pure cotton yarn and polyester cotton blended yarn. Due to the different raw materials used, the physical properties of each raw material are different, and the product quality requirements are different, different production processes need to be adopted during processing. (With the update of modern equipment, there have been varying degrees of adjustments in the process. The equipment can merge some of the processes together, reducing some of the necessary work in actual observation.)

（1） Process flow of pure cotton yarn

1. Carding yarn: Clear flower → Carding cotton → Head merging → Double merging → Coarse yarn → Fine yarn → Post processing

2. Combed yarn: Clearing → Carding → Pre merging → Stripe and roll → Combing → Head merging → Double merging → Triple merging → Roughing → Fine yarn → Post processing

（2） The process flow of polyester cotton blended yarn

1. Plain combed yarn: Raw cotton: Clear flower → Comb cotton →

→ Head merging → Two merging → Three merging → Coarse yarn → Fine yarn → Post processing

Polyester: Clear flower → Comb cotton →

2. Combed yarn:

Raw cotton: Clearing → Carding → Pre blending → Stripe and roll → Combing →

→ Head merging → Two merging → Three merging → Coarse yarn → Fine yarn → Post processing

Polyester: Clearing → Carding → Pre blending →

The difference between machine woven yarn and knitted yarn

Machine woven yarn requirements: high strength with few cotton knots.

Knitted yarn has relatively lower strength than machine woven yarn, but requires higher details and lower twist

The twist coefficient of woven yarn is generally around 380, while knitted yarn only needs around 340.

For example, for a 40s single yarn, the twist of woven yarn is 99 twists/10cm, while for knitted yarn, it is approximately 88-89 twists