Created in DuPont’s Fundamental Research Laboratory in Wilmington, De., and unveiled by chemist Wallace H. Carothers on Feb. 28, 1935, Nylon 6,6 was the basis of what would soon become the first commercially successful synthetic thermoplastic polymer. This early example of Nylon 6,6 is wound on a spool marked “153 / 45-15-4 / 20 Z / Dull / Unsized.”
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