<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31370895</termId><termName>polyethylene</termName><termType>PT</termType><termNote><![CDATA[ A group of polyolefin polymers derived from ethylene by polymerization by heat and pressure. ]]></termNote><termCreatedDate>2026-03-30 20:40:02</termCreatedDate><relation><relationType>UF</relationType><termId>31370896</termId><termName>PE</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31370897</termId><termName>polyethylene resin</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31340150</termId><termName>thermoplastic</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31373519</termId><termName>polyolefin</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31409825</termId><termName>ethylene-vinyl acetate</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31340114</termId><termName>polyethylene foam</termName><termType>PT</termType></relation></term>  </Zthes>