MANUFACTURE OF ELECTRICALLY CONDUCTIVE PLASTIC CORRUGATED BOARD SHEET

摘要

PURPOSE:To efficiently obtain an electrically conductive plastic corrugated board sheet in line by a method wherein molten resin is extruded and simultaneously co-extruded heat bonding plastic film/electrically conductive film are delivered onto an inner core so as to laminate to the inner core formed by extruding molten resin on an endless belt. CONSTITUTION:Firstly, molten resin 12 is extruded from a T-die 11 on an endless belt 13 with a large number of recessed holes thereon and sucked from below the belt so as to form the inner core 14 of a corrugated board sheet. Secondly, molten resin 16 is extruded from a T-die 15 and simultaneously a film 17 consisting in co-extruding heat bonding plastic film/electrically conductive film is delivered onto the inner core. Thirdly, the resultant resin and film assembly is fixed by pressure with a roll 18. Finally, a plastic film is pasted onto the other side of the inner core 14 in order to obtain the titled electrically conductive plastic corrugated board sheet.