POLYETHYLENE TEREPHTHALATE SHEET, MANUFACTURE THEREOF AND VESSEL USING THE SHEET

摘要

PURPOSE:To improve releasability at a time when polyethylene terephthalate (PETP) resin sheets are superposed. CONSTITUTION:A polyethylene terephthalate sheet is formed in the satin shape of surface roughness of 1.5-3.5S. Polyethylene terephthalate extruded from the T die 12 of an extruder 10 in a sheet shape is held between molding rolls 14, 16, in which irregular surfaces are formed to roll surfaces, thus forming irregularities to a sheet surface 20. A vessel is manufactured by using the polyethylene terephthalate sheet.