<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31436381</termId><termName>nylon 6,6</termName><termType>PT</termType><termNote><![CDATA[ A durable, dyable nylon fiber formed from hexamethylenediamine and adipic acid. Nylon 6,6 was developed at DuPont in 1935. It is very similar in structure to nylon 6, a rival product created ny I.G. Farbenindustrie four years later, and the two types of polyamide fiber remain the most commonly used by the textile and plastics industries worldwide. ]]></termNote><termCreatedDate>2026-03-30 20:57:40</termCreatedDate><relation><relationType>BT</relationType><termId>31409823</termId><termName>nylon</termName><termType>PT</termType></relation></term>  </Zthes>