本文件规定了聚甲基丙烯酸甲酯（PMMA）挤出双皮和三皮平板的质量控制试验方法，该平板由无色和有色透明、半透明和不透明等级的材料制成。 最小板材宽度为600毫米。 这些板材主要应用于建筑和农业（温室）。

This document specifies the test methods for quality control of poly(methyl methacrylate) (PMMA) extruded double- and triple-skin flat sheets, obtained from colourless and coloured transparent, translucent and opaque grades of materials. The minimum sheet width is 600？mm. The main applications of these sheets are in building and agriculture (greenhouses).