Prediction of Rotor Spun Yarn Strength Using Adaptive Neuro-fuzzy Inference System and Linear Multiple Regression Methods

This paper presents a comparison study of two models for predicting the strength of rotor spun cotton yarns from fiber properties. The adaptive neuro-fuzzy system inference （ANFIS） and Multiple Linear Regression models are used to predict the rotor spun yarn strength. Fiber properties and yam count are used as inputs to train the two models and the count-strength-product （CSP） was the targel. The predictive performances of the two models are estimated and compared. We found that the ANFIS has a better predictive power in comparison with linear multiple regression model. The impact of each fiber property is also illustrated.

Studies of the Mechanical Properties of Viscose Wrapped Spandex Yarn

In this paper ,we can learn the performance of viscose wrapped spandex yarn through several aspects ,including yarn strength, elastic recovery rate and boiling shrinkage.If we grasp these structure characteristics, we can spin out the best yarn that we need.

A Study of the Behaviour of Denim Cloth Made from Modified Rotor Spun Yarn

This paper described the physical behaviour of three types of denim cloths produced from rotor yarn, ring yarn and modified rotor yarn (prepared by adding conventional twist to rotor yarn) respectively. Experimental work showed that denim cloth produced from the modified rotor yarn has superior properties over conventional rotor yarn in terms of surface texture and appearance,tearing strength and resistance to abrasion.

Analysis of Cotton Yarn Properties Spun on Aerodynamic Compact and Open-End Rotor Spinning

This article presents a comparative analysis of the properties of cotton yarn spun on aerodynamic compact spinning and open-end rotor spinning systems. Yarn samples with a linear density of 50 Tex, 37 Tex, 30 Tex, 25 Tex, and 20 Tex were spun both on the aerodynamic compact and rotor spinning systems using the same finisher drawn sliver of medium staple cotton which were produced by a specific mixing. The quality parameters such as mass variation, imperfection index, hairiness, and tensile behavior (strength in count strength product, elongation percentage) of the yarn samples were assessed and analyzed. The results revealed that aerodynamic compact spun yarn had a lower unevenness and mass variation, a higher imperfection in case of a finer count, less hairiness, higher tensile strength, and lower elongation% compared to the open-end rotor spun yarn samples. Finally, paired- samples t-test and regression analysis were carried out by using IBM SPSS 25 to check the significance of yarn quality parameters and correlation among them.

Predicting the Tensile Curve of Polyester Twisted Ply Yarn under Large Deformation

Considering the changes of ply yarn 's structure parameters during the axial extension,a new model has been proposed for predicting the tensile curve of polyester twisted ply yarn under large deformation without the tensile strength tests.The relationships between the structural parameters and tensile properties under large deformation were considered.The feasibility and accuracy of the model were studied by comparing the predictive results and the experimental ones.The structural parameters in the model were acquired under every strain before rupture.The radial dimension and twist angle of the yarn were obtained by an observation platform and image processing technique.The true modulus of the yarn was obtained indirectly from the tensile data of the single yarn and the mathematical equations.The tensile curves of the yarns at different twist levels for predicting were plotted.The results demonstrated that the predicted curve tendency and the values were quite close to the experimental ones.The model exhibited a good applicability to predict the tensile curves for low and medium twist yarns.

The Effect of Gauge Length on Tenacity of Cotton Yarns

The tensile properties of cotton yarns are studied. A lot of data are gotten and analyzed. It indicates that the breaking strength of the yarns follows Weibull distribution. Then the effect of sample length on strength is analyzed using Weibull's statistics. The Weibull parameters are calculated through regression method.The breaking strength of the yarn at different sample length is predicted. Theoretical prediction conforms the experimental results very well.

不同芯丝对喷气涡流包芯纱及其织物性能的影响

为探究不同芯丝对喷气涡流包芯纱及其织物性能的影响规律,以莫代尔纤维和智能调温纤维为外包纤维,分别以T400长丝、涤纶DTY长丝和锦纶6长丝为芯丝纺制3种包芯纱,并织成针织物。探讨相同成纱条件下不同芯丝喷气涡流包芯纱的强伸性能、毛羽以及条干均匀度,同时分析相应针织物的悬垂性、耐折皱性和抗起毛起球性。结果显示:芯丝为T400长丝的包芯纱强伸性能最好,且其织物的抗起毛起球性最好;芯丝为涤纶DTY长丝的包芯纱织物挺括抗皱,保形性较好;芯丝为锦纶6长丝的包芯纱毛羽最少、条干最均匀,并且织物悬垂性、透气性最好。

细号纱超轻薄服装面料开发实践

为提高纯棉服装面料质量,拓展产品功能的多样性,以长绒棉为原料,采用单纱和股线均为Z捻的同捻向新工艺,开发CJ 5.83×2×CJ 5.83×2 248×248 165.1 ZZ强捻细号纱超轻薄服装面料;通过介绍其工艺流程,分析各工序工艺参数及技术要点,以及测试集聚纺CJ5.83 tex经纬筒纱成纱质量及相关织物质量指标。指出:生产特细号纱的关键是做好原棉选择、前纺各工序工艺参数设置及车间温湿度控制;提高精梳落棉率、减小并条工序牵伸倍数、采取集聚纺纱等措施,能有效降低条干不匀率、提高纤维利用率和伸直平行度,可使单纱强度提高10%;采用集聚纺CJ5.83 tex合股强捻纱生产的超轻薄面料,透气性、吸湿性、耐磨性、防水性好,织机效率可达90%,坯布下机一等品率达92.4%。

玄武岩基复合纱线的制备及其阻燃织物性能

玄武岩纤维是一种高性能绿色材料。为探究玄武岩纤维成纱结构及其织物性能,开发多功能纺织产品,以玄武岩为基体材料,运用包覆纺纱技术和摩擦纺纱技术,将芳纶、超高分子量聚乙烯、阻燃粘胶作为外包覆材料制备复合纱线,所制备的纱线包括双芳粘胶及聚芳粘胶两种,分析纱线的微观形貌、拉伸断裂、弯曲性能以及热稳定性能,测试所制成织物的阻燃性能及防切割性能。结果表明:双芳粘胶纱线具有较高的力学性能及热稳定性能,聚芳粘胶纱线拥有更优异的柔软性能。在织物阻燃效果方面,双芳粘胶织物与聚芳粘胶混纺织物的极限氧指数都超过27%,这两种织物切割性能均达到防护二级标准,混纺织物切割性能优于纯纺织物。

捻度配置对双向包覆纱性能的影响及优化

为了纺制兼具回弹性和导电性的包覆纱,探讨捻度配置对包覆纱强伸性能和回弹性能的影响。以氨纶、不锈钢丝、棉股线为原料,基于空心锭包缠纺设备,纺制以氨纶为纱芯、不锈钢丝为第一外包覆层、棉股线为第二外包覆层的双向包覆纱。重点分析包缠捻度、外内捻度比等工艺参数对双向包覆纱的强伸性能、回弹性能的影响,利用主成分分析法对试验结果进行综合评判。结果表明:包缠捻度和外内捻度比对双向包覆纱强伸性能影响显著。在设定范围内,当包缠捻度800捻/m、外内捻度比1.0时,双向包覆纱综合质量较优。双向包覆纱在拉伸态下具有优良的导电特性,拓展了其在柔性可拉伸导线和柔弹电加热器件领域的应用范畴。认为:纺制兼具回弹性和导电性的双向包覆纱时,捻度配置是关键参数。

数据驱动与有限元仿真融合的纱线断裂强力分析方法

为揭示机器人运动速度等参数对纱线性能的影响规律,考虑纱线夹持长度与拉伸速度对断裂强力分布的影响,分析了动态环境下环锭纺细纱断裂强力的分布特征。首先设计拉伸实验对环锭纺细纱性能进行分析,并构建了环锭纺短纤纱本构模型表征其强伸性能。其次建立有限元仿真模型模拟短纤纱的断裂过程,揭示了纤维间载荷传播的规律和纱体结构演化的4个阶段模型。最后对纱线强力数据的统计特征进行分析,建立了其分布参数模型。结果表明,分布检验与威布尔分布相比,对数正态分布的拟合误差最小,残差平方和为0.0006,进一步提高了动态环境下环锭纺细纱强力预测的可靠性。

玄武岩复合纱线的制备及强伸性能分析

为探究玄武岩复合纱线的强伸性能,分别制备了芯纱为单股、双股的玄武岩包覆纱,分析了玄武岩单股无捻结构芯纱包覆纱、玄武岩双股加捻结构芯纱、玄武岩双股无捻及加捻结构芯纱包覆纱在不同条件下的强伸性能变化规律。研究表明:以单股玄武岩为芯纱,外包不同种类材料如芳纶、超高分子量聚乙烯、锦纶及其复合纱时,纱线的强伸性能变化规律不同;以双股玄武岩为芯纱,复捻锭速在750 r/min且捻度为50捻/m时,芯纱强伸性能稳定,是合适的加捻参数;玄武岩双股加捻结构芯纱包覆纱强力较高,且随着包覆捻度的增大,其断裂强力变化明显小于双股无捻结构芯纱包覆纱。

混纺比对PLA棉混纺纱力学性能的影响

为了研究混纺比对PLA棉混纺纱力学性能的影响关系,制备了PLA含量为10%~90%的9种混纺纱以及纯PLA纱、纯棉纱,并对其力学性能进行测试。将混纺纱中各组分纤维的强伸曲线用纯PLA纱和纯棉纱的强伸曲线替代,建立混纺纱强伸性能预测模型,以提升模型预测的精准度。结果表明:试验所用PLA/棉的临界混纺比为70/30,当PLA含量低于70%时,混纺纱的断裂强度随着PLA含量的增加逐渐下降,而断裂伸长率趋于稳定;当PLA含量高于70%时,混纺纱的断裂强度和断裂伸长率都逐渐增大;混纺纱力学性能指标的实测值与模型预测值具有高度一致性,体现了预测模型的准确性。认为该预测模型为预测混纺纱力学性能提供了一种比较简便的方法。

酚醛纤维/聚酰亚胺纤维混纺纱开发

为了更好地利用酚醛纤维的热学性能开发适合应用的隔热织物,基于其纤维规格及性能,以聚酰亚胺纤维与其进行混纺,详述其原料处理、混纺比例、流程设计、梳理成条、粗纱、细纱工序的工艺要点,在尽可能提高酚醛纤维含量的基础上,纺制出酚醛纤维含量为40%~70%的4种32 tex混纺纱线,并对混纺纱的指标进行测试与分析。指出:在酚醛纤维/聚酰亚胺纤维混纺纱中,随着酚醛纤维含量增大,纱线的断裂强度、毛羽指数、条干CV值以及千米节结等质量指标均呈恶化趋势;酚醛纤维的含量最高能达到约70%水平。

ES/棉热粘合混纺纱的制备及性能

为了开发一种热粘合混纺纱,研究热粘合纤维的混入对纱线结构和性能的影响,采用ES纤维和棉纤维进行混纺,制备出不同混纺比(40/60、50/50、60/40、70/30、100/0)、不同细度(30tex、24tex、18tex)的ES纤维/棉混纺纱,研究了不同热粘合处理条件下(加热温度、加热时间)纱线断裂强力、毛羽指数和芯吸性能等变化。结果表明,热粘合处理后混纺纱的断裂强力有较大的提升,随着热粘合温度的升高、热粘合时间的增加,纱线的毛羽指数明显减小,但芯吸性能有所下降。

基于聚丙烯酸钠溶液的给液纺纱线性能研究(下)

为显著降低环锭纱线毛羽,采用环锭给液纺进行纺纱,利用特定溶液与纤维之间的相互作用加强纤维控制,使毛羽紧密贴服在须条表面,并在加捻过程中被卷入须条内部,完成有害毛羽的有效降低。选取与纤维素极性相似的聚丙烯酸钠(PAAS)配置不同浓度溶液,对溶液性能与所纺纱线的结构与性能进行测试,结果表明,随PAAS浓度的增加,溶液表面张力逐渐增加并接近水的表面张力,粘度提高,对应粗纱粘附力也相应增加。给液纺纱线表面更加紧密光洁,纱线毛羽大幅度减少,毛羽减少率达60%以上,络筒后仍可保持,纱线强力与耐磨性能也有一定提升。因此,采用PAAS溶液进行给液纺纱生产纯棉纱线确实可有效降低纱线毛羽,改善纱线强力与耐磨性能,综合提升纱线品质。

基于聚丙烯酸钠溶液的给液纺纱线性能研究(上)

为显著降低环锭纱线毛羽,采用环锭给液纺进行纺纱,利用特定溶液与纤维之间的相互作用加强纤维控制,使毛羽紧密贴服在须条表面,并在加捻过程中被卷入须条内部,完成有害毛羽的有效降低。选取与纤维素极性相似的聚丙烯酸钠(PAAS)配置不同浓度溶液,对溶液性能与所纺纱线的结构与性能进行测试,结果表明,随PAAS浓度的增加,溶液表面张力逐渐增加并接近水的表面张力,粘度提高,对应粗纱粘附力也相应增加。给液纺纱线表面更加紧密光洁,纱线毛羽大幅度减少,毛羽减少率达60%以上,络筒后仍可保持,纱线强力与耐磨性能也有一定提升。因此,采用PAAS溶液进行给液纺纱生产纯棉纱线确实可有效降低纱线毛羽,改善纱线强力与耐磨性能,综合提升纱线品质。

基于聚酰亚胺纤维军用三角包扎巾混纺纱的开发

为了提高军用三角包扎巾的性能,采用抗静电剂对聚酰亚胺纤维进行预处理并设计混纺纱工艺流程,以聚酰亚胺纤维和新丽赛纤维为原料,成功纺制聚酰亚胺纤维含量为30%,40%和50%,号数为18.4 tex的混纺纱;对混纺纱的强力、毛羽和条干不匀率进行测试分析,利用模糊综合评价法综合评判出最优混纺比例纱线并试织小样、测试指标。指出:当聚酰亚胺纤维含量增大时,混纺纱的强伸性能增强,毛羽和条干性能逐渐恶化;聚酰亚胺纤维比电阻高、回潮率低,在纺纱时需要对其进行抗静电预处理;聚酰亚胺纤维/新丽赛纤维混纺比例为50/50的纱线综合性能最好,所制三角包扎巾满足YY/T 1467—2016标准要求,且具有止血抗菌性能。

再生棉涤包缠纱的纺纱工艺参数优化

为了提高再生棉短纤纱的性能,选择再生涤纶长丝包缠在再生棉短纤外层,制成具有紧密纱线结构的再生涤棉包缠纱。为了提高包缠纱的可纺性,分析关键工艺参数对成纱汇聚点的影响,通过具体纺纱试验优选长丝牵伸倍数、短纤须条与长丝间距和成纱捻系数。结果表明:以再生棉和再生涤纶长丝为原料纺制包缠纱时,在长丝牵伸1.03倍、短纤须条与长丝的间距4 mm和成纱捻系数400的工艺条件下,再生棉涤包缠纱的质量最优。将再生棉制成纱线是实现废旧纺织品循环再利用的有效方法。