| 摘要 |
The present invention relates to a polyester thermoplastic resin which is fed to a twin extruder, wherein said resin is heated under fusion, thereby removing humidity from the resin, evacuating and suctioning from its ventilation opening, injecting a foaming agent to the resin, which is pushed as a foaming sheet and, subsequently, forming the foaming sheet, which is divided into a formation body and a burring-loss, due to which the burring-loss is compressed to obtain compressed materials which are provided to place materials in the twin extruder as recollection materials and to recycle them. |
