Lecture 1 ttqc-2
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This document discusses atmospheric conditions and the fabric length measurement process. It outlines the ideal relative humidity of 65% and temperature of 20°C, with tolerances of ±4% and ±2°C respectively. Fabrics are preconditioned at 25% relative humidity and 50°C for 4 hours according to ISO139:2005(E). The fabric length measurement process involves marking fabrics at 5 yard intervals and measuring if changes are less than 0.25% after 24 hours in the testing atmosphere. Continuous width measurement uses photoelectric cells at each selvedge to detect width changes and translate signals into an indicated or recorded cloth width with accepted accuracy of ±0.3cm.
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Lecture 1 ttqc-2
- 3. Atmospheric condition: • Relative Humidity:65% • Temperature:20◦C(68 ◦F) • Tolerance Zone: Relative Humidity :±4% Temperature:±2◦C • Preconditioning: Relative Humidity:25% Temperature:50◦C(122◦F) Time: 4hrs N.B: According to ISO139:2005(E)
- 4. Importance of Atmospheric Condition
- 6. Fabric Length Measurement Process Flow: A Wide Table which can accommodate the open cloth width with one edge graduated One trial measurement before conditioned
- 7. Marks are made on the selvedge at 5yds intervals (for fraction of 5yds measured at the end is measured nearest .5’’) leaving 24hrs testing atmosphere again measured. If changes <0.25% second measurement is appropriate Some fabrics may recover more than .25% in the first 24hrs. They are left for a further 24hrs and remeasured and repeated until <0.25%change of previous. Then final measurement is taken
- 8. Length measurement in Ware Houses and inspection rooms
- 10. Fabric Path Diagram on Inspection Table
- 12. Fabric width
- 13. Continuous Measurement of width By Jiewertz design Process • On running fabric using one pair of photoelectric cell at each selvedge through scanning edge. • Detecting changes in width. • Signals are translated into cloth width. indicated on meter or recorded on a chart. • Accuracy ±.3cm accepted.