3 Quality Standard
-
Upload
shoreless-shaikat -
Category
Documents
-
view
31 -
download
5
description
Transcript of 3 Quality Standard
Problem of Quality Assessment
For decades, yarn buyers, as well as most spinning mills, have evaluated yarn quality based on the USTER® TESTER. These checks are based on random samples of 1/1000 of the spinning mill production.
Off-Line Laboratory tests (USTER® TESTER 4-SX etc.) allow a statement on average yarn quality. Bad bobbins (Off-Standards) such as higher hairiness, IPI etc. are only detected by pure chance.
But modern high-performance machines in knitting and weaving mills require an absolutely constant yarn quality.
A spinning mill produces with 40‘000 spindles a yarn Ne30 100% cotton. The daily production is 22‘000 kg.
conventional yarn testing in laboratory (Uster Tester)= testing scope per day:
Quality Assurance - Yarn Testing
0,014 % of production 3,12 kg (ca. 1 Cone)
. . . are therefore State-of-the-Art in Textile Quality Control and conform with the long-standing philosophy of Loepfe in modern textile quality control
100 % of the production checked
100 % of the Off-Standard bobbins removed
Online Textile Laboratory Functions
YarnMaster Spectra+
Cluster Channel ClearingShort, Long , Thin Clusterto detect: periodical and non periodical faults
Fault cluster can be detected independent of size of the single yarn defect.
- FaultCluster curve
Significance of the Surface Index?
The surface of a yarn is characterized by:
• Irregularities (Thick-Thin)• Hairiness, Neps
E
• You do not know when the ring spindle causes poor quality compact yarn.
• There are chances of producing very neppy yarn in compact spinning.
• Hairiness reduction and compact structure of the yarn surface are the key parameters of the compact spun yarn.
• So, surface monitoring of the yarn and the detection of the poor surface is a must – The ultimate solution for this is SFI
SFI- The Ultimate Solution for Compact Spun Yarn