1. WEAVING TECHNOLOGY

4. Yarn Preparation Process Diagram WARP YARN, WEFT YARN 1.0 WARPING 2.0 SIZING 3.0 DRAW-IN / TYING-IN WEAVING

5. 1.0 WARPING The warping process transfers the yarn from multiple packages to a section beam. To produce a quality beam suitable for weaving, the following must be accomplished: 1) no lint, fly, wild yarn 2) no high or low selvage 3) maintain warper speed 4) maintain braking systems 5) no crossed or loose ends 6) uniform tension across beam 7) uniform tension beam to beam 8) smooth section beams, rollers

6. creel warpers beam

10. Schematic of a simple sizing configuration

12. The passage of the warp through a loom

16. Shedding

17. A. Shedding occurs here… Shedding is the lifting of some of the warp yarns, so that the warp is divided into 2 sheets. This creates an opening (a shed) between them for the weft carrier to pass through. B. Picking… The weft yarn taken from one side of the warp through the shed. C. Beating-up… The inserted pick is consolidated or ‘beaten-up’ into the fabric when the new pick is pushed into the cloth-fell by the reed. picks

23. Twill Weave

24. Satin Weave Warp faced satin weave filling faced satin weave

26. % Crimp, %c = [(l y – l fab ) / l fab ] x 100 Crimp (waviness of yarns) Fabric Take up % Take up, %t = [(l y – l fab ) / l y ] x 100