Spinning cotton into yarn, generally involves major processes such as clearing, carding, drawing, roving, and spinning. Yarns for high-end products also require an additional combing process.
The production of different requirements of cotton yarn, to take different processing procedures, such as spinning pure cotton yarn and polyester cotton blended yarn, due to the use of different raw materials, various raw materials have different physical properties, and product quality requirements are different, when processing Different production processes are required.
(A) pure cotton yarn process
1. Carded yarn:
Clearing the flower → carding → first-combining→ second-combining → roving → spun yarn → post-processing
2. Combed yarns:
Clearing the flower → carding → pre-combining → strips → combing → first-combining → second-combining→ third-combining→ roving → spun yarn → post-processing
(B) Process flow of polyester-cotton blended yarn
Raw rotton:clearing the flower→ carding → first-combining → second-combining→ third-combining → roving → spun yarn → post processing
Polyester: clearing the flower → carding →
2. Combed yarn:
Clearing the flower → carding → pre-combining → strips → combing→ first-combining → second-combining→ third-combining→ rovings → spun yarn → post processing
Polyester: clearing the flower → carding → pre-and →
※ Spooling process:
Winding machine:It is to rewind the pipe yarn from the twisting machine into a certain shape and large capacity of the bobbin.At the same time, the impurities and defects on the yarn are eliminated, so as to improve the productivity of the post-process.
※ Warping process:
Warping machine: According to the process design requirements, A certain number of warp yarns, according to the specified length, width, under the action of a certain tension parallel winding on the warp beam.
※ Sizing process:
Sizing machine: In order to make the single fiber of the yarn bond with each other, increase the breaking strength of the yarn, to facilitate the smooth weaving of the machine.Put the finished warp shaft on the sizing machine, after the suction, through the oven drying.
※ Drawing-in process:
Drawing-in machine: According to the process design requirements,according to a certain order, each warp yarn on the warp beam is inserted into the harness wire and the reed, and the dropper is inserted into the warp yarn.To make sure everything goes smooth in the weaving process
※ Weaving process:
Shuttle loom: The warp beam is guided through the shuttle on the shuttle loom.The fabric is woven into grey fabric according to the technical requirements and coiling into a roll.
Gray fabric inspection: The cloth after weaving passes the inspection personnel to complete the inspection work using the CNS inspection standard to understand the quality status after the completion of the weaving to facilitate the dyeing of the grey cloth.
Reactive dyeing or normal dyeing are two ways of the dyeing . Reactive dyeing is now generally used because the color fastness, rubbing fastness, etc., are all superior to normal dyeing. The disadvantage is that the price is slightly higher than nomarl dyeing.In general, the dyeing step is like this: pre fabric setting→grey fabric genapping→do the preshrinking(This process is not required for every product, it’s up to the designs)→dyeing→heatsetting→semi-finished product genapping→calendering→steaming. To this end, the dyeing work was finished.
After dyeing, the unpackaged cloth will be sent to the inspection workshops for full inspection. We generally inspect the fabric according to the American standard four-point system. After that, according to the different requirements of different customers, completing the corresponding packaging, hereto, the entire production process is completed. Waiting for shipping.