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The planar amide (-CO-NH-) groups are very polar, so nylon forms multiple hydrogen bonds among adjacent strands. Because the nylon backbone is so regular and symmetrical, especially if all the amide bonds are in the trans configuration, nylons often have high crystallinity and make excellent fibers. The amount of crystallinity depends on the ...
The loincloth is the simplest form of underwear; it was probably the first undergarment worn by human beings. In warmer climates, the loincloth was often the only clothing worn (effectively making it an outer garment rather than an undergarment), as was doubtless its origin, but in colder regions, the loincloth often formed the basis of a ...
Nylon was the start of blending two or more yarns in the production of socks, a process that still continues today. In recent history, scientific evidence has suggested that wearing socks to sleep can be beneficial in that it helps the individual to fall asleep faster and stay asleep longer.
Nylon 66 (loosely written nylon 6-6, nylon 6/6, nylon 6,6, or nylon 6:6) is a type of polyamide or nylon. It, and nylon 6 , are the two most common for textile and plastic industries. Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid , which give nylon 66 its name. [ 1 ]
The wearing of clothing is exclusively a human characteristic and is a feature of most human societies. There has always been some disagreement among scientists on when humans began wearing clothes, but newer studies from The University of Florida involving the evolution of body lice suggest it started sometime around 170,000 years ago.
What could really move the needle on electric vehicle sales? "The three-row electric vehicle market is so important for EV sales in the U.S.," Ed Kim, president and chief analyst of AutoPacific ...
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DuPont made public in 1938 that their company had invented nylon. [1] This new invention was the first synthetic fiber, fabrics that are commonly used in textiles today. [2] In 1939, DuPont began marketing nylon monofilament fishing lines; however, braided Dacron lines remained the most used and popular fishing line for the next two decades, as early monofilament line was very stiff or "wiry ...