邢喜全,秦丹,钱军,王方河,阮佳伦
XING Xi-quan,QIN Dan,QIAN Jun,WANG Fang-he,RUAN Jia-lun

• 1:宁波大发化纤有限公司
• 2:东华大学材料科学与工程学院纤维材料改性国家重点实验室

摘要(Abstract)：

为了寻求低成本、高附加值的再生方法,提出了微醇解与液相增黏结合的方式回收废旧聚酯(PET)纺织品。通过工艺探索及优化,确定了最佳工艺参数为:m[Zn(OAc)2]∶m(EG)∶m(PET)=1∶2.5∶1 000,醇解温度280℃,醇解时间10 min,自由沉降反应器温度275℃、压力4.0×104Pa,圆盘成膜反应器温度280℃、压力100 Pa。制备的再生PET熔体的特性黏度为0.658 d L/g,多分散性系数为2.14。与不经微醇解直接液相增黏的工艺对比,该再生方法使过滤器使用周期延长1.8倍,螺杆的加热和电机功率降低16%,节约了大量的能耗;且能够有效解决液相增黏过程中旋风分离器管道与反应釜之间管道堵塞和蒸汽喷射泵冷凝器易结焦的问题。
In order to seek the low cost way with high added value to recycle waste polyester fabric, the com-bined method of micro glycolysis and liquid polymerization was proposed in this paper. The optimal process pa-rameters were determined through research: m[Zn(OAc)2]∶m(EG)∶m(PET)=1∶2.5∶1 000, 280 ℃, 10 min;275 ℃, 4.0×104Pa(free falling reactor), 280 ℃, 100 Pa(disc film forming reactor). The intrinsic viscosityand polydispersity index of recycled PET were 0.658 d L/g and 2.14. A variety of high-quality and high val-ue-added recycled polyester staple fiber could be produced through process adjustment in industrial pro-duction. Compared with liquid polymerization process without micro glycolysis, the operation period of filtercould be prolonged 1.8 times and the screw heating and motor power could be decreased 16%, which saveda lot of energy consumption under the condition of the article. Besides, it could effectively solve the problemthat the pipeline was easy to be blocked and the steam jet pump condenser was easy to be coked in the pro-cess of liquid polymerization.

关键词(KeyWords)： 废旧聚酯纺织品;微醇解;液相增黏;自由沉降-圆盘成膜反应器
waste polyester fabric;micro glycolysis;liquid polymerization;free falling-disc film forming reactor

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 邢喜全,秦丹,钱军,王方河,阮佳伦
XING Xi-quan,QIN Dan,QIAN Jun,WANG Fang-he,RUAN Jia-lun

DOI: 10.16090/j.cnki.hcxw.2017.06.010

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