溶剂法回收废旧聚酯纺织品技术

利用二甲基亚砜（DMSO）溶解纯涤织物及涤/棉混纺织物，并回收利用涤纶（PET）和棉纤维。研究结果表明，DMSO试剂可以回收纯涤织物，尤其当温度在185~194℃时DMSO与纯涤织物溶解反应相对较快，溶解时间为12min。在一定反应时间内DMSO易溶解涤纶而不溶棉纤维，将其用于回收PET和棉纤维。涤/棉织物投入到温度为185~194℃的 DMSO试剂中，溶解60min，将不溶于DMSO试剂的棉纤维在温度为185~194℃的条件下滤出并回收，同时从溶解液中回收聚酯。回收的棉纤维性能稳定，运用领域广泛。再生PET的特性粘度随DMSO试剂回收率的增加而增大。

Recovery of waste polyester textiles via solvent method

Polyester (PET) and cotton fiber in polyester fabric and polyester/cotton fabric were separated and recycled by use of dimethyl sulfoxide (DMSO). The results show that, polyester fabric can be dissolved easily and recycled in DMSO. It just needed 12min especially when the temperature is during 185~194℃. Meanwhile, because polyester can be dissolved but cotton fiber insoluble in some time, DMSO can be used for separating and recycling PET and cotton fiber form Polyester/cotton fabric. Polyester /cotton fabrics put into the DMSO reagent for 60min. its temperature is 185~194℃.Because it can not be soluble in DMSO, the cotton fibers were recycled by filtering out from the solution with the conditions of temperature about 185~194℃. Moreover, polyester was recycled from the solution. Because of stable performance, the recycled cotton fibers can be used in areas. Intrinsic viscosity of PET increased with the high recycling of DMSO.