香蕉茎秆纤维/抗菌纤维混纺纱的制备及其性能

Preparation and properties of banana stem fiber/antibacterial fiber blended yarn

为促进天然香蕉茎秆纤维在纺织服装领域的应用,采用半精纺纺纱工艺,以香蕉茎秆纤维(BF)、优可丝安泰贝抗菌纤维(ATB)和稀土抑菌再生纤维素纤维(XT)为原料,制备了混纺比为50/50、65/35、70/30、85/15的8种BF/抗菌纤维混纺纱和1种BF纯纺纱,表征了纱线的线密度和捻度,探究了混纺比例与纱线力学性能、质量指标、抗菌性能的关系。结果表明,9种纱线实测的线密度和捻度与设计值存在偏差,但其偏差在允差范围内;ATB和XT的加入提高了BF纯纺纱的力学性能与抗菌性能,改善了BF纯纺纱的条干均匀度、毛羽指数、棉结、粗节、细节等质量指标,且香蕉/抗菌纤维混纺纱强度高、毛羽少、手感柔软,适宜开发各类机织和针织面料。

Objective With the proposal of the"double carbon economy"policy,green environmental protection and sustainable development become the direction of future textile development,and Xitu it is of great significance to develop new natural plant fibers and promote the application of natural banana stem fibers in the field of textile and clothing.Method The semi-worsted spinning process was adopted with banana stem fiber(BF),EcoCosy R antibacterial fibers(ATB)and rare earth antibacterial regenerated cellulose fiber(XT)as raw materials.Eight types of BF/antibacterial fibers(ATB and XT)blended yarns,with blending ratio of 50/50,65/35,70/30 and 85/15,and one BF pure spun yarn were prepared.The yarn density and twist were characterized,and the relationship between the blending ratio and mechanical properties,quality index and antibacterial properties of the yarn was investigated.Results The measured linear density and twist of the 9 types of yarns were different from the designed values,but the deviation was within the tolerance range.The mechanical properties of BF pure spinning are poor,with the breaking strength being(7.12±1.45)cN/tex,the elongation at break(2.56±0.43)%,and the initial modulus(247.11±81.07)cN/tex.The mechanical properties of yarns were improved with the addition of ATB and XT content.The elongation at break of BF/ATB(50/50)and BF/XT(50/50)yarns was the highest,which was(4.19±0.46)%and(4.74±0.41)%.The breaking strength of BF/ATB(85/15)and BF/XT(70/30)yarns is the highest,and they were(9.33±1.45)cN/tex and(8.97±1.28)cN/tex respectively.With the increase of the content of ATB and XT,the defects such as knots,thick knots and detail of the yarn were greatly reduced,and the evenness of yarn strip and hairiness index were improved.The yarn unevenness was decreased from^(2)1.83%to 13.91%and 14.8%respectively,and the hair index was decreased from 6.72 mm to 5.85 mm and 5.27 mm respectively,decreasing by 13%and 22%.The bacteriostatic rate of BF pure spinning against Escherichia coli was 65.47%,and the bacteriostatic rate of yarn increased with the increase of ATB and XT content.When the ratio of BF/ATB and BF/XT blended yarn was 50/50,the inhibition rate of Escherichia coli reached the maximum,which were 88.79%and 84.76%respectively,while for Staphylococcus aureus,the content of ATB and XT had little effect on the inhibition rate,and the inhibition rate of BF pure spun yarn and blended yarn could reach more than 95%.Conclusion The addition of ATB and XT improved the mechanical properties and antibacterial properties of BF pure spinning.In addition,it also improves the quality indexes of BF pure spun yarn,such as strip evenness,hairiness index,knots,thick knots and details,making the blended yarn have higher breaking strength,excellent antibacterial property.It is of great significance for its application and development in clothing,and is suitable for the development of leisure woven shirt fabric and knitted fabric.