An Experimental Technique to Determine the Permissible Warp Tension Variation At the Required Pick Density
TSS Jayawardana1, EASK Fernando2, GHD Wijesena3

1T.S.S. Jayawardane*, Department of Textile & Clothing Technology, Faculty of Engineering, University of Moratuwa, Sri Lanka.
2E.A.S.K. Fernando, Department of Textile & Clothing Technology, Faculty of Engineering, University of Moratuwa, Sri Lanka.
3G.H.D. Wijesena, Department of Textile & Clothing Technology, Faculty of Engineering, University of Moratuwa, Sri Lanka. 

Manuscript received on September 09, 2020. | Revised Manuscript received on September 25, 2020. | Manuscript published on October 10, 2020. | PP: 14-18 | Volume-9 Issue-12, October 2020 | Retrieval Number: 100.1/ijitee.L78941091220  | DOI: 10.35940/ijitee.L7894.1091220
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Weaving is considered to be the most versatile means of manufacturing fabric. Due to versatility, process control is mandatory to ensure the quality of the woven fabric becomes a diverse task with a broader scope. With the advent of technology speed of weaving has been drastically increased due to which variation in warp tension becomes an inevitable fact for value-added technical products. Further, variation in warp tension results in different pick density which causes a shade variation due to different amounts of dye penetration along with the fabric. Maintain constant pick density throughout weaving is considered as the most important aspect. The pick density is greatly affected by the warp gaiting tension at which the fabric is woven and experiment results revealed that the warp gaiting tension is considerably changed when the beam is weaved down. Authors attempt to statistically analyze the quantitative relationship between the warp gaiting tension and the pick density. However, due to the high level of variability of warp gaiting tension along the warp with slightly scattered nature of experimental data, setting up a relationship with adequate accuracy is beyond achievable. Hence the warp gaiting tension is first grouped using a statistical technique and established the relationship for each group. The level of accuracy for each model is evaluated at 95% of the confidence interval and thereby determined the permissible tolerance in warp gaiting tension under which the required pick density could be still achieved. 
Keywords: Pick density, Warp gaiting tension, Statistical grouping, Analysis of variation, Regression models.