In order to improve the quality of CJ 9.7 tex yarn, the company chose 15% long-staple cotton in the head and combined with fine-staple cotton to ensure the quality of the product while taking into account the normal production. The selected long-staple cotton index is: cotton grade 2.0, main body length 36.3 mm, quality length 38.2 mm, short pile ratio 8.17%, impurity content 1.26%, single fiber strength CV value 6.1%, The micronaire value was 3.82.

In the combing process, the spinning of long-staple cotton is particularly important. In order not to break the fibers, the combing of the cotton is reduced on the premise of ensuring the quality of the product, and the cost of the raw material of the ton of yarn is reduced.

First of all, the drafting ratio of the combing preparation process should not be too large to prevent the sliver from being too cooked. Pre-synthesis process A272F pre- draw frame adopts 5 joints, the rear zone draws 1.77 times; the total drafting is 5 times to 6 times, and the front hook fiber is stretched as much as possible; the roller gauge is 8 mm×14 mm. The A191 type winding machine adopts 18 pieces to prevent small rolls from sticking and improves the longitudinal and lateral uniformity of the small rolls; the total drafting is 1.399 times; in order to improve the streaks of the small rolls, the guide rollers are supplied to the cotton rollers. The drafting was reduced from 1.0294 times to 1.005 times.

Due to the long length of the long-staple cotton fiber, in order to prevent the detaching roller from being caught by the cylinder pin at the end of the cylinder when it is poured into the machine, the A201C comber bow position is adjusted from 1.5 to 0.5. Indexing, while adjusting the carding gauge. In order to make the upper clamp plater lip not affect the front end of the plexus aligning the separation jaws, the nipper closure timing is appropriately delayed and adjusted to 28.5 divisions, so that the nipper plate is closed at the third and fourth row pins of the cylinder.

When processing fine cotton, the length of the detaching roller is within 8.5 to 9.5 due to the relatively short fiber length. When the long-staple cotton is processed, the length of the fiber is relatively long, the bow-shaped plate is advanced, and the timing of the separation roller is advanced, in the range of 8.0 to 8.5. In order to reduce the rate of long-staple cotton, the top comb installation scale is adjusted from 4 to 7, and the top comb swing angle is increased, which can effectively comb the fiber end and reduce the neps.

The doffing dial is adjusted from 13 to 12, and the drop gauge is adjusted from 10.3 mm to 9.5 mm to reduce the rate of doffing. In addition, in order to prevent fiber damage and improve the drying of the combed strips, the front and rear drafting roller spacing is adjusted from 7 mm to 14 mm; the pressurization of the separating rubber roller is emphasized. After adjustment, the combing rate is 12.53%, the combed cotton has a short pile rate of 63.5%, the combed strip contains velvet (16 mm or less) is 4.85%, and the combed strip has a CV value of 4.95%. The yarn quality of the final product was: the dry CV value was 16.1%, the detail was 86/km, the thick section was 202/km, and the neps was 192/km. The final product quality meets the requirements for use and has achieved good economic benefits.

Yantai Liangcai Plastic Chemical Fiber Factory specializes in production: functional masterbatch, plastic masterbatch, standard monochromatic masterbatch, complex masterbatch, functional masterbatch, complex masterbatch, non-woven tester, meltblown non-woven Cloth machine, hydrophilic masterbatch, functional masterbatch, etc