阅读说明：本技术 一种废旧涤纶纺织品完全醇解纺制再生纤维的工艺 (Process for spinning regenerated fibers by complete alcoholysis of waste polyester textiles ) 是由 肖洪卫 成强 张昕 于 2021-07-15 设计创作，主要内容包括：本发明涉及一种废旧涤纶纺织品完全醇解纺制再生纤维的工艺,包括以下步骤：1挑选、分拣；2撕碎；3混料；4物料缓存；5密实处理；6预醇解；7粗过滤；8一次精过滤；9深度醇解；10二次精过滤；11低沸物脱除；12高沸物脱除；13预缩聚；14终缩聚；15熔体精过滤；16纺丝；17冷却成形；18上油卷绕；19多道牵伸；20卷曲；21定型；22切断；23打包。本发明通过废旧涤纶纺织品完全醇解,醇解液过滤除去低聚物、机械杂质；过滤得到的醇解液进行两次纯化脱杂,脱除低沸物、高沸物得到高纯度对苯二甲酸二乙二醇酯(BHET)；高纯度对苯二甲酸二乙二醇酯(BHET)聚合后得到粘度高、分子量分布窄、端羧基含量低、可纺性好、品质均一的再生纤维。(The invention relates to a process for spinning regenerated fibers by complete alcoholysis of waste polyester textiles, which comprises the following steps: 1, selecting and sorting; 2, shredding; 3, mixing materials; 4, caching materials; 5, compacting; 6, pre-alcoholysis; 7, coarse filtration; 8, fine filtering for one time; 9 deep alcoholysis; 10, fine filtering for twice; 11, removing low-boiling-point substances; removing 12 high-boiling-point substances; 13 pre-polycondensation; 14 final polycondensation; 15 fine filtering the melt; 16 spinning; 17 cooling and forming; 18, oiling and winding; 19, multi-pass drawing; 20, curling; 21, shaping; 22, cutting off; and 23, packaging. The method comprises the steps of completely alcoholyzing the waste polyester textiles, and filtering alcoholysis liquid to remove oligomers and mechanical impurities; purifying and removing impurities twice from the alcoholysis solution obtained by filtering, and removing low-boiling-point substances and high-boiling-point substances to obtain high-purity diethylene glycol terephthalate (BHET); the high-purity diethylene glycol terephthalate (BHET) is polymerized to obtain the regenerated fiber with high viscosity, narrow molecular weight distribution, low carboxyl end group content, good spinnability and uniform quality.)