During World War 2, Nylon was invented and been replaced everything that was once made from #silk—such as silk stockings—as silk imports from Asia experienced significant #shortages and #price#fluctuations.
Nylon 6 and Nylon 66 are both synthetic polymers called #polyamides (PA), a.k.a 【聚酰胺】.
Most Nylons are semi-crystalline and possess good #strength and #durability for demanding applications.
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