聚酯-聚酰胺6中空桔瓣超细纤维/Lyocell纤维非织造复合材料的制备与性能

Preparation and properties of polyester-polyamide 6 hollow segmented-pie microfiber/Lyocellfiber non-woven composites

采用纺粘技术制备聚酯-聚酰胺6(PET-PA6)双组份中空桔瓣纤维,并与Lyocell纤维网复合,经高压水刺制备双层复合结构的PET-PA6/Lyocell非织造材料,研究了纤维复合比例及面密度对复合非织造材料性能的影响。结果表明:PET-PA6/Lyocell复合非织造材料具有明显的三维立体结构和双层复合结构,PETPA6纤维裂离后纤维等效直径介于3.60~6.50μm之间,Lyocell纤维的直径介于9.30~11.50μm之间,且有部分原纤化的微原纤维。面密度一定时,PET-PA6/Lyocell非织造材料相比于PET-PA6非织造材料,亲水性能有明显的提升,当PET-PA6与Lyocell纤维含量比值为1∶1时(面密度为160 g/m^(2)),透气率为249.47 L/(cm^(2)·s),提升117.83%;透湿率为4035 g/(m^(2)·24 h),提升36.01%;柔软度为4.39 mm,提升67.56%;同时力学性能有所增加,纵横强力比由1.5降至1.2,相差幅度明显降低;但热稳定性有略微的下降。随着的面密度增加,复合非织造材料的透气透湿性能逐渐降低,柔软度降低,力学性能有所增强。Lyocell纤维的复合使非织造材料的综合性能有了明显的提升,非织造布的三维立体结构和双层复合结构与天然皮革的微观结构相似,有望在超细纤维合成革基布领域得到应用。

Polyester-polyamide 6(PET-PA6)bicomponent hollow segmented-pie PET-PA6 microfiber was prepared by spunbond technology,and composited with Lyocell fibers web,and PET-PA6/Lyocell composite nonwoven materials with double-layer composite structure were prepared by high-pressure spunlace.The effects of fiber composite ratio and areal density on the performance of composite nonwoven materials were studied.The results show that the PET-PA6/Lyocell composite nonwoven material has an obvious three-dimensional structure and double-layer composite structure.After spunlacing,the fiber equivalent diameter of PET-PA6 fiber is between 3.60 and 6.50μm,the diameter of Lyocell fiber is between 9.30 and 11.50μm,and some fibrillation microfibrils appear.At the same areal density,PET-PA6/Lyocell nonwoven material is compared with PET-PA6 nonwoven material,the hydrophilic property has been significantly improved.When the content ratio of PET-PA6 and Lyocell fiber is 1∶1(gram weight is 160 g/m2),the air permeability is 249.47 L/(cm2·s),increased by 117.83%;the water vapor permeability is 4035 g/(m2·24 h),increased by 36.01%;the softness is 4.39 mm,increased by 67.56%;at the same time,the mechanical properties have been increased,and the aspect ratio of tensile strength is reduced from 1.5 to 1.2,and the phase difference is significantly reduced;but the thermal stability is slightly reduced.As the areal density increasing,the air permeability and water vapor permeability of the composite nonwoven material are gradually decreased,the softness is decreased,and the mechanical properties are increased.The combination of Lyocell fibers have significantly improved the overall performance of nonwoven materials.The three-dimensional and doublelayer composite structure of nonwoven fabrics are similar to the microstructure of natural leather,and are expected to be applied in the field of microfiber synthetic leather base.