<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31370963</termId><termName>polyvinylidene chloride</termName><termType>PT</termType><termNote><![CDATA[ Synthetic resin that is produced by the polymerization of vinylidene chloride. Discovered in 1933, and developed as a flexible film primarily used as a food wrap, initially marketed as "Saran Wrap." It is used as a barrier against water, oxygen and vapor. Chemically resistant to alkalies and acids, it is insoluble in oil and organic solvents, and is impervious to mold, bacteria, and insects. ]]></termNote><termCreatedDate>2026-03-30 20:40:02</termCreatedDate><relation><relationType>UF</relationType><termId>31370964</termId><termName>PVDC</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31370965</termId><termName>chloride, polyvinylidene</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31340156</termId><termName>thermoset</termName><termType>PT</termType></relation></term>  </Zthes>