EFFECT OF OPENING OPERATING PARAMETERS ON YARN QUALITY IN FINE AND MEDIUM COUNT FRICTION SPINNING

In this paper, a quantitative analysis of the opening quality in friction spinning and its main ef-fecting factors is first made. Upon this basis the Box-Hunter’s experimental design method is usedto establish the quadratic regressional equations in terms of primary opening technologicalparameters and yarn quality for medium and fine count friction spinning. The results of analysisand discussion show that the proper choice of opening roller speed and its reasonable match withthe yarn count is singificant for ensuring the spinning quality index as well as reducing unevenness,thin and thick places of the yarn.

Study on Licker-In and Flat Speeds of Carding Machine and Its Effects on Quality of Cotton Spinning Process

Spinning has a significant influence on all textile processes. Combinations of all the capital equipment display the process’ critical condition. By transforming unprocessed fibers into carded sliver and yarn, the carding machine serves a critical role in the textile industry. The carding machine’s licker-in and flat speeds are crucial operational factors that have a big influence on the finished goods’ quality. The purpose of this study is to examine the link between licker-in and flat speeds and how they affect the yarn and carded sliver quality. A thorough experimental examination on a carding machine was carried out to accomplish this. The carded sliver and yarn produced after experimenting with different licker-in and flat speed combinations were assessed for important quality factors including evenness, strength, and flaws. To account for changes in material qualities and machine settings, the study also took into consideration the impact of various fiber kinds and processing circumstances. The findings of the investigation showed a direct relationship between the quality of the carded sliver and yarn and the licker-in and flat speeds. Within a limited range, greater licker-in speeds were shown to increase carding efficiency and decrease fiber tangling. On the other hand, extremely high speeds led to more fiber breakage and neps. Higher flat speeds, on the other hand, helped to enhance fiber alignment, which increased the evenness and strength of the carded sliver and yarn. Additionally, it was discovered that the ideal blend of licker-in and flat rates varied based on the fiber type and processing circumstances. When being carded, various fibers displayed distinctive behaviors that necessitated adjusting the operating settings in order to provide the necessary quality results. The study also determined the crucial speed ratios between the licker-in and flat speeds that reduced fiber breakage and increased the caliber of the finished goods. The results of this study offer useful information for textile producers and process engineers to improve the quality of carded sliver and yarn while maximizing the performance of carding machines. Operators may choose machine settings and parameter adjustments wisely by knowing the impacts of licker-in and flat speeds, which will increase textile industry efficiency, productivity, and product quality.

Impact of the Speed of Flat of a Typical Carding Machine on the Quality of Carded Sliver and 40 Ne Yarn

The carding cycle affects the sliver quality and the subsequent yarn attributes since it is the main sliver formation step. Processing parameters assume a significant part in affecting the nature of the eventual outcome in any sorts of production. In the case of carding machine, a higher production rate makes the operation more sensitive. And this will cause degradation in product quality. So optimization of speed is the talk of the town in spinning field [1]. Extreme higher speed can prompt fiber harm and unnecessary neps generation will corrupt the end result. Again lower speed will lessen the production rate which isn’t reasonable. So we need to discover the ideal speed which will be advantageous to both product quality and production rate. In carding machine, real operational activity happens between flats and cards [1]. From an ordinary perspective, high produce able cards generates higher level of speed. Speed of the cards impacts the carding cycle and the nature of the yarn and in practical point of view, flat’s level of speed is advanced and optimized. The aim of the project was to find out the optimum flat speed in the context of yarn quality. 40 Ne cotton yarns were produced with the slivers manufactured at different flat speeds such as 240, 260, 280, 300 and 320 mm/min. The quality parameters of slivers and yarns were tested and analyzed.

Study on Licker-In and Flat Speeds of Carding Machine and Its Effects on Quality of Cotton Spinning Process

Spinning has a significant influence on all textile processes. Combinations of all the capital equipment display the process’ critical condition. By transforming unprocessed fibers into carded sliver and yarn, the carding machine serves a critical role in the textile industry. The carding machine’s licker-in and flat speeds are crucial operational factors that have a big influence on the finished goods’ quality. The purpose of this study is to examine the link between licker-in and flat speeds and how they affect the yarn and carded sliver quality. A thorough experimental examination on a carding machine was carried out to accomplish this. The carded sliver and yarn produced after experimenting with different licker-in and flat speed combinations were assessed for important quality factors including evenness, strength, and flaws. To account for changes in material qualities and machine settings, the study also took into consideration the impact of various fiber kinds and processing circumstances. The findings of the investigation showed a direct relationship between the quality of the carded sliver and yarn and the licker-in and flat speeds. Within a limited range, greater licker-in speeds were shown to increase carding efficiency and decrease fiber tangling. On the other hand, extremely high speeds led to more fiber breakage and neps. Higher flat speeds, on the other hand, helped to enhance fiber alignment, which increased the evenness and strength of the carded sliver and yarn. Additionally, it was discovered that the ideal blend of licker-in and flat rates varied based on the fiber type and processing circumstances. When being carded, various fibers displayed distinctive behaviors that necessitated adjusting the operating settings in order to provide the necessary quality results. The study also determined the crucial speed ratios between the licker-in and flat speeds that reduced fiber breakage and increased the caliber of the finished goods. The results of this study offer useful information for textile producers and process engineers to improve the quality of carded sliver and yarn while maximizing the performance of carding machines. Operators may choose machine settings and parameter adjustments wisely by knowing the impacts of licker-in and flat speeds, which will increase textile industry efficiency, productivity, and product quality.

不同品质类型海岛棉纺细号纱研究

为明确自育2份材料的可纺性及开发前景,与车间大货同步开展纺4.2~9.8 tex纺纱试验,并测试各环节质量指标。元龙39号纤维断裂比强度和马克隆值较高,更适合生产9.8 tex的纱;而元龙34号因纤维细度、纤维断裂比强度的优势,更适合生产4.2 tex的纱。对育种者而言,应根据纺纱需求制订选育目标,当选育开发低号、超低号纱的品种时,应重点筛选纤维细度、纤维断裂比强度,以此提升纱线强力及质量。

纯棉高支纱的纱线强伸性能测试与评价方法探讨

纯棉高支纱的强伸性能对原料性能变化更为敏感,同时在长度方向的变化更为平缓。因此,在采用现行标准规定的方法时,可能面临因采样过少而导致的结果不稳定,造成对产品性能的误判。文章提出一种大容量连续采样测试法,在测定样品断裂强力、断裂强力变异系数(CV)、断裂伸长率、断裂伸长率CV之外,还补充了强伸性能直方图、强伸性能散点图、断裂强力波谱图等评价指标,对现行方法进行补充完善。实验表明,该方法不仅能有效提升传统方法的准确性与可靠性,还能从强伸性能在纱线长度方向分布特点的角度对强伸性能进行更为综合的评价,为生产实践提供有效指导。

混纺纱标样设计制备及近红外光谱定量验证

为解决混纺纱标样制备方法成本高、周期长、成分含量覆盖面窄导致的模型准确性较低、模型种类较少、产业化应用受限等问题,将细号单纱/单丝混并法用于制备混纺纱标样,测试了该方法制备的棉涤纶锦纶三组分混纺标样的混纺偏差和均匀性,并制作棉涤纶二组分纱标样,对相应的近红外光谱定量检测模型进行了优化。经过化学溶解法和新建近红外光谱定量模型的验证,细号单纱/单丝混并法所制备的棉涤纶二组分、棉涤纶锦纶三组分和棉腈纶锦纶涤纶四组分混纺纱混和均匀、制备快速,成分含量偏差小于0.8%;不同织物结构会对近红外光谱的检测产生影响;加入空白标准混纺样品所建新模型测试更加准确。

棉纱线细度不匀特性的分析

为深入研究纱线细度不匀问题,依据纤维通道重排假构模型和纱线细度不匀的经验预报公式对棉纱线细度不匀的预报影响因数进行分析。将纤维有效长度改为平均长度,引入纤维线密度和纱线线密度因数改进了纱线细度不匀的经验预报公式。对改进后的经验预报公式进行分析,得到了纱线纤维通道数与纱条截面纤维根数的倍率、纱线线密度、纤维长度、线密度及不匀等参数对棉纱线条干不匀的影响规律。随着纤维细度变异系数的增大、纤维线密度的增大、纱线线密度的减小、纤维通道数与纤维根数倍率的减小、纤维平均长度的减小,棉纱线条干不匀增大,研究结果与实际生产相一致,对棉纱线生产质量的控制和提高具有参考作用。

提高特细号高密品种浆轴质量的实践

为提高特细号纱的浆轴质量,从原纱质量、设备状态、工艺参数、操作方法等方面入手,制定了一系列工艺措施及质量控制指标。通过改进整经工序张力区域划分、调整浆纱工艺路线和浆料配方、改进浆纱及穿筘操作方法,使浆纱好轴率提高到85%以上,织机效率达到82%左右。

影响浆液浸透效果的因素分析

引入了多孔介质、孔隙率、渗透率等概念,从纱线结构的特点出发,利用渗流理论,举例分析探讨了细号纱上浆的工艺理论,并强调了压浆力与上浆率的关系。

国产毛棉设备结合生产羊绒高支纱

通过生产实践,分析了毛精纺及棉纺设备在羊绒纺纱过程中的优缺点,提出了利用国产毛、棉设备结合生产羊绒高支纱技术的工艺路线及主要的工艺参数,有利于降低设备投资和生产成本,从根本上降低纺纱生产费用。

精梳绒毛高支纱加工技术的研究进展

文章主要介绍了精梳绒毛高支纱加工中使用的羊毛原料培育、细分和改性加工技术,纺纱加工系统的选配以及新开发的各种纺纱加工方法。

用水溶性维纶伴纺高支羊绒/Modal产品

采用水溶性维纶伴纺技术生产的高支轻薄羊绒/Modal产品轻薄滑爽,手感柔软,悬垂性好,服用性能优良,而且生产成本低。文章对纤维的各项性能进行了分析,并重点介绍了纺纱各工序的关键工艺与措施。

CJ 5.8 tex×2巴里纱的无浆生产

为使CJ 5.8 tex×2巴里纱产品的顺利生产,采用长绒棉纺制了CJ 5.8 tex×2股线。由于CJ 5.8tex单纱和CJ 5.8 tex×2股线的捻度配置大,且单纱与股线采用同向加捻,平衡性差、捻缩较大,采用“两次定捻法”,确保定捻效率达到75%以上,为分条整经和剑杆织机织造提供了先决条件,使织机的效率达到95%以上,下机一等品率达到98.7%,取得了较好的效果。

线密度及其量和单位的规范使用

目前纺织科技期刊来稿中对术语线密度及其量和单位的表述方法不规范,术语有纤度、细度、纱支、号数等,单位有旦尼尔、公支、英支、支等。针对这一问题进行分析,认为主要原因是:部分标准本身没有标准化,有些现行术语标准标龄过长,部分纺织标准对线密度术语不重视;纺织工具书在解释线密度等词时不明确;《辞海》等工具书不重视线密度及其量和单位;纺织贸易中习惯用旦尼尔或支数,基本不用线密度(tex)。建议纺织科技期刊应严格执行《量和单位》国家标准的规定,准确使用线密度量符号和单位,并加强《量和单位》等基础性标准宣传的力度。

棉毛赛络纺包芯纱的生产

为了顺利纺制棉毛包芯纱并提高成纱包覆效果,对细纱机进行改造,安装了适应毛纱的退绕机构和张力控制方式,推导出理论最小外包棉纤维的号数,计算出棉在包芯纱中体积含量为60%时的包芯纱号数及粗纱定量,并对细纱工艺参数进行了优化设计。结果表明:纺制51 tex(18.4 tex)棉毛赛络纺包芯纱,芯纱张力控制在33 cN^35 cN为宜;两根粗纱的喂入间距以小为宜;捻系数以小为宜,但不能低于280;前罗拉速度偏小掌握,在240 r/min^280 r/min;后区罗拉中心距尽量放大至63 mm,纺制出的棉毛赛络包芯纱包覆效果好。

特细号及细号高密织物压浆力的选择

为提高细号高密织物及特细号高密织物的浆纱质量,在S432型浆纱机上应用不同压浆力进行了上浆实践。通过对浆纱质量及织造效果进行测试对比,认为细号高密织物适宜于采用高压上浆工艺,主压浆辊压力宜控制在24 kN左右;特细号高密织物适宜于采用中压上浆工艺,主压浆辊压力控制在15 kN左右有利于贴伏毛羽,增加被覆。

国产设备加工精纺高支羊绒纱的研究

阐述国产棉、毛设备加工精纺高支羊绒纱的设备选型、加工技术关键、设备改造以及加工工艺 ,并说明该套设备费用低、效果好 。

精纺高支轻薄面料综合性能分析

讨论了不同范围纱支的毛纱对轻薄毛纺面料产品风格、服用性能方面的影响,分析认为纱支过高对原料成本、生产成本、质量和管理成本会产生负面影响。为使原料资源得到合理的利用,同时满足消费者多元化及多样化的需求,提出了精梳毛纺织产品既要符合毛纺面料轻薄化发展趋势,纱线支数又应控制在合理的范围之内,同时提出了精梳毛纺产品应该向多样化发展的设想。

高支精梳纯纺牦牛绒机织面料工艺研究

针对牦牛绒纯纺精梳纱与轻薄型机织面料开发难度较高的现状,在比较牦牛绒与几种相近纤维理化性能的基础上,提出了基于精梳的毛纺工艺,生产高支精梳牦牛绒纱与机织面料的工艺措施。阐述产品技术规格以及生产工艺流程,介绍有关技术参数和工艺重点。对获得的纱线和织物的性能指标进行测试,结果表明:开发的60 Nm精梳机织纱各项性能符合后道织物生产要求,成品精纺面料轻柔滑爽、呢面整洁、手感丰满,比羊绒更有身骨,且无需染色,绿色环保。