Alkalis : Good to dilute and both are destroyed in concentrated alkalis. To flame : Both fibers burn easily and quickly. 3.4 NYLON: Nylon was the first synthetic fiber. In 1928 the Dupont company decided to establish a fundamental research program. If anything was discovered it would be good for the company - a means of diversification. It was noticed that when a glass rod was taken out Manufacturing of Nylon Evaoprator Hexamethylene diamine Adipic acid Water Water Auto clave Chipper Spinning solution Water Washer Spinning Continuous Filament Meter and Pump Air cooled Twisting and Transferring yarn depending upon end use Individual filaments brought together as yarn Spinning Soution Drawing Rolls Spinning Staple Undrawn Tow Crimping Rolls Heat Baled 400 to 500 lb. Packages Cut to Desired Length of one of the polyester stills the solution adhering to it stretched out into a solid filament.

(a) Kick pleat (b) Sunray pleat (c) Box pleat (d) pinch pleat 10. How several Rows of gathers is called as. (a) Shirring (b) pleats` (c) Tucks (d) darts Answer in a one word: 1. What is the other name for full dart? 2. What is pin tuck? 3. What is size of pin tuck? 4. In which pleat, two knife pleats are turned towards each other? 5. Where will a bobbin elastic be used? 139 PART � II Answer in a paragraph: 1. What is single dart? 2. What is French dart.