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.

Probably the most common method is to convert fibers into yarns, which are then constructed into fabrics. Yarns are essential for knitted, woven or knotted structures and for many braided ones. Yarn is defined by the American Society for Testing and Materials (ASTM) as A generic term for a continuous strand of textile fiber, filament, or material suitable for knitting, weaving to form a textile fabric. Yarn occurs in the following forms.