废旧涤纶织物醇解再生制备低熔点粘合纤维  

Preparation of low-melting point copolyester bonding fiber from post-consumer polyester fabric by glycolysis

作　　者：钱军 王少博[2] 邢喜全 王朝生[2] 王方河 王赛博 林世东[3] 

机构地区：[1]宁波大发化纤有限公司,浙江宁波315336 [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,上海201620 [3]中国化学纤维工业协会再生化纤专业委员会,北京100022

出　　处：《合成纤维工业》2016年第4期45-48,共4页China Synthetic Fiber Industry

摘　　要：以废旧涤纶织物为原料，采用乙二醇醇解法对废旧涤纶织物进行化学再生，制得再生聚对苯二甲酸乙二醇酯（PET）；在化学再生过程中以间苯二甲酸，1，4－丁二醇为改性单体进行共聚，制得再生低熔点共聚酯（ LPET）；采用皮芯复合纺丝工艺将再生LPET（皮）与再生PET（芯）按一定复合比例进行纺丝并进行拉伸后处理，制得再生低熔点PET粘合纤维。结果表明：与常规大有光PET比较，再生PET的热稳定性与之相近，再生LPET的热稳定性稍差，但不影响其加工应用；再生LPET的软化温度为76℃，熔融温度为125℃；再生LPET与再生PET按皮芯质量比为4：6，在纺丝温度280℃，冷却风温度22℃，吹风速度1．2 m／s，纺丝速度1100 m／min，拉伸浴槽温度60～65℃，拉伸倍数2．9的条件下进行皮芯复合纺丝制得再生低熔点PET粘合纤维，纤维的线密度为4．6 dtex，断裂强度为3．22 cN／dtex，断裂伸长率为48．2％，干热收缩率为5．6％，回潮率为0．41％，完全达到FZ／T 52010—2014《再生涤纶短纤维》的指标要求。Polyethylene terephthalate （ PET） was recycled from post-consumer PET fabric by ethylene glycol glycolysis and was copolymerized with isophthalic acid and 1,4-butanediol as modified monomers during the chemical recycling process to produce a low-melting point copolyester （ LPET） .And a recycled low-melting point PET bonding fiber was prepared by using the recycled PET as the core and the recycled LPET as the sheath at a certain proportion via sheath -core composite spinning process prior to tensile post-processing .The results showed that the recycled PET had the similar thermal stability and the recycled LPET had the lower thermal stability than normal bright PET , giving no impact on the processing and application; the recycled LPET had the softening point of 76℃and the melting point of 125℃;the recycled low-melting point PET bonding fiber could be prepared with the linear density of 4.6 dtex, breaking strength 3.22 cN/dtex, elongation at break 48.2%, dry-hot shrinkage 5.6%, moisture regain 0.41%, perfectly satisfying the requirements of FZ/T 52010-2014 Recycled Polyester Staple Fiber , under the conditions as followed：sheath-core mass ratio 4：6, spinning temperature 280 ℃, quenching temperature 22 ℃, quenching speed 1.2 m/s,spinning speed 1 100 m/min, drawing bath temperature 60-65 ℃, draw ratio 2.9.

关 键 词：聚对苯二甲酸乙二醇酯纤维 废旧涤纶纺织品 再生 乙二醇 醇解 低熔点聚酯 皮芯复合纺丝 粘合纤维 

分 类 号：TQ342.2[化学工程—化纤工业]