| 摘要 |
PURPOSE: A polyester-based multi-layered foaming sheet and a method for manufacturing the same are provided to increase the life of the sheet by preventing the generation of interlayer peeling phenomenon. CONSTITUTION: A method for manufacturing a polyester-based multi-layered foaming sheet includes the following: a first polyester resin is manufactured by condensation-polymerizing an acid component and alkylene glycol; the first polyester resin is solid-polymerized to obtain a second polyester resin; a second sheet is co-extruded on both sides of a first sheet, composed of the first polyester resin, to obtain a multi-layered sheet; and the multi-layered sheet is gas-foamed. The acid component is based on aromatic dicarboxylic acid. The limiting viscosity of the second polyester resin is higher than the limiting viscosity of the first polyester resin. |
