兴安宸亿工贸有限公司开发出一种废旧聚对苯二甲酸乙二醇酯回收再利用方法。回收废旧聚对苯二甲酸乙二醇酯制品,分拣去杂,清洗除去表面污染物,粉碎过80目筛,取筛下物干燥处理;将干燥后的筛下物送入双螺杆挤出机,挤出熔融后得熔体;用负压将熔体中的低聚物和气泡抽出;过滤熔体,过滤后熔体通过多层复合模头直接拉模,得PET薄膜粗品,将PET薄膜固定在卷染机上染色,第一次烘干,70~120℃水漂洗1~5 min,第二次烘干,得PET薄膜成品。该方法简单实用,操作步骤 Xing Chen Chen billion Industry and Trade Co., Ltd. developed a waste of polyethylene terephthalate recovery and reuse methods. Recycling waste polyethylene terephthalate products, sorting to remove impurities, cleaning to remove surface contaminants, crushed by 80 mesh sieve, and sieved material drying; the dried sieve into the twin-screw extrusion The melt is extruded after extrusion; the oligomers and bubbles in the melt are extracted by negative pressure; the melt is filtered, the melt is directly drawn through the multi-layer composite die to obtain the crude PET film, the PET The film was fixed on a jigger dyeing machine, the first drying, water rinsing 70 ~ 120 ℃ 1 ~ 5 min, the second drying, the PET film finished. The method is simple and practical, operation steps