<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31409816</termId><termName>acrylic sheet</termName><termType>PT</termType><termNote><![CDATA[ Acrylic in the form of transparent or translucent solid sheets. Prepared by cast polymerization or extrusion; acrylic sheets are lightweight, tough, and colorless with excellent clarity and outdoor weather resistance. Compared to glass, acrylic is lighter and shatter-resistant, but more susceptible to scratching and transmission of UV. Acrylic has the unique ability to carry light around corners. Originally introduced as 'organic glass' in 1931.  ]]></termNote><termCreatedDate>2026-03-30 20:50:11</termCreatedDate><relation><relationType>UF</relationType><termId>31409817</termId><termName>acrylic glass</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409818</termId><termName>acrylic sheets</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409819</termId><termName>organic glass</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409820</termId><termName>sheet, acrylic</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31370838</termId><termName>acrylic</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299296</termId><termName>Lucite (TM)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299297</termId><termName>Perspex (TM)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31299299</termId><termName>Plexiglas (TM)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31375048</termId><termName>sheet glass</termName><termType>PT</termType></relation></term>  </Zthes>