Observation of Damage of Cotton Fiber in the Processes of Blowing, Cleaning and Carding

Abstract

The quality of the produced yarn mainly depends on the properties of the raw material, its preparation for spinning, the condition of the equipment, and the preservation of the natural quality of cotton fiber during processing. The question of the number of defects in cotton fiber and their total content is a very important issue for cotton spinning. The non-standardized number of defects in the raw material reduces the quality indicators and yarn yield, which requires additional technological processes; therefore, on the part of production, the requirements for reducing the share of cotton fiber defects are constantly increasing. During processing in blowing and cleaning units and on carding machines, the cotton fiber is mechanically damaged. To observation the damaged fibers, we used the Congo-Roth red paint according to the method of Ch. Dore. Despite the carding is considered the last stage in the process of cleaning the fibers from impurities and defects in the spinning system, 30% of impurities and fiber defects still remain on the card sliver. Besides, it should be noted the carding machine is also considered an additional occurrence of defects, in particular (neps), which reduce the quality indicators of the card sliver and the finished product.

Setting Jarak Antara Top Flat dengan Cylinder terhadap Jumlah Neps Sliver Carding di Mesin Carding

“…Untuk kapas yang sulit dibersihkan, mungkin dilakukan dengan carding. Blowing hanya memakai bahan mentah menjadi jumbai (Dadol et al, [6]), carding harus terbuka ketahap serat (Tojimirzaev et al, [19]; Omonov et al, [16]), ini penting untuk memungkinkan pengotor dihilangkan dan operasi lainnya dilakukan. Penghapusan benda asing terjadi, tetapi tidak secara eksklusif di daerah licker-in.…”

The influence of increasing the productivity of the carding machine on the quality indicators of the card sliver

“…Since 1965, productivity has increased from approximately 5 kg/h to 180 kg/h [7]. Modern carding machines are very complex with many functions, regulation sensors, monitoring of neps, microprocessor-controlled operations, servomotor settings, integrated grinding systems (IGS) from Rieter [8], triple take-up drum, fixed flat segments, with increased carding area and automatic waste collection, suction points for lint extraction and easy-to-maintain machine design.…”