抗菌PTT POY的结构与性能研究

Structure and properties of antibacterial PTT POY

采用银系抗菌母粒与聚对苯二甲酸丙二醇酯(PTT)切片共混熔融纺丝,在一定纺丝速度下,通过改变泵供量,制备了不同线密度的抗菌PTT预取向丝(POY);研究了纤维的结晶、取向、物理性能和抗菌性能。结果表明:与未加抗菌母粒的PTT POY相比,对于相同规格的PTT POY,随抗菌母粒的加入,其初生纤维的结晶度降低,取向度略有上升,断裂强度和断裂伸长率有所下降,沸水收缩率变化不大;加入5%抗菌母粒的PTT POY对大肠杆菌和金黄色葡萄球菌具有良好的抑菌效果;随着喷丝头拉伸比的增加,抗菌PTT POY的取向度和结晶度相应增加,断裂伸长率降低,断裂强度增加,沸水收缩率有所下降。

Antibacterial polytrimethylene terephthalate pre-oriented yams （ PTT POY） with different linear density was pre- pared by regulating the pump delivery during the melt blend spinning of silver antibacterial masterbatch and PT]＂ at a certain spin- ning speed. The crystallinity, orientation, physical properties and antibacterial property of the resulted fiber were studied. The results showed that as compared with PIT POY without antibacterial masterbatch, the antibacterial PTT POY of the same specifi- cation had the crystallinity dropping, the orientation degree slightly rising, the breaking strength and elongation at break slightly dropping and boiling water shrinkage changing not much with the addition of antibacterial masterbatch; the fairly good antimicro- bial effect can be obtained against Escherichia coli and Staphylococcus aureus as 5% antibacterial masterbatch was added into PTT POY ; and the orientation degree and the crystallinity of the antibacterial FIT POY was correspondingly increased, the elon- gation at break was decreased, the breaking strength was increased and the boiling water shrinkage was decreased in some degree as the draw down ratio was increased.