Application Handbook_Uster_Statistics - Uster Technologies

MicronaireCharacteristics Abbreviation Unit DescriptionMicronaire Mic Parameter describing cotton fiber finenessTable 4-2Micronaire Ratings:below 3.0 = very fine3.1 - 3.9 = fine4.0 - 4.9 = average5.0 - 5.9 = coarseover 6.0 = very coarseColor & TrashCharacteristics Abbreviation Unit DescriptionReflectance Rd % Reflectance of the fibers, higher Rd values mean a higher colorgradeYellowness +b Yellowness of the fibers (Nickerson/Hunter scale)Trash Area Tr Area % Area of the sample covered with trash particlesTrash Cnt Tr Cnt Number of trash particlesTable 4-3Applicable standards for USTER ® HVIASTM D-1448, ISO 2403 Micronaire reading of cotton fibersASTM D-1447Fibrograph measurement of length and length uniformityASTM D-1445Breaking strength and elongation (flat bundle method)ASTM D-2253Nickerson/Hunter colorimeterASTM D-2812Non-lint content of cottonASTM D-5867High-volume instrument testing4.1.2 Single fiber measurement with USTER ® AFISThe USTER ® AFIS (Advanced Fiber Information System) is used for the measurement of individualfibers. The fibers are opened and individualized with a pair of spiked rollers surrounded by cardingsegments. The fiber opening unit works by aero-mechanical separation to separate trash particlesand large seed-coat fragments from the fibers. These trash particles are extracted through the trashchannel, while individual fibers and neps pass through the fiber channel. Both channels are equippedwith opto-electrical sensors. The modular design of the USTER ® AFIS provides extensive informationon important quality parameters and the respective frequency distribution.NepsCharacteristics Abbreviation Unit DescriptionTotal Nep Nep 1/g Number of neps per gramSCN SCN 1/g Number of seed-coat neps per gramTable 4-4USTER ® STATISTICS 14 (36)